feminine hygiene absorbent article

专利摘要:
AN ABSORBENT ARTICLE WITH A TOP SHEET WITH MULTILAYERS. An absorbent article capable of providing comfort to the user is maintained, while maintaining dryness and inhibiting fluid leakage. The absorbent article includes a multilayer topsheet that includes a first topsheet layer that has an opening placed above a second topsheet layer. The first top sheet layer and the second top sheet layer are joined by a seal, in one embodiment, generally corresponds to the shape of the opening that overlaps the second top sheet layer. In addition, a first sublayer of the topsheet is located below the multilayer topsheet and has an opening that is smaller than the opening of the first topsheet layer. This combination of openings located one below the other provides an absorbent article that can maintain a high level of dryness and prevent the leakage of body fluids due to a tapering effect and its ability to fit the user's body.
公开号:BR112015011504B1
申请号:R112015011504-7
申请日:2012-12-04
公开日:2020-12-29
发明作者:Lin Miao；Xueen George Hao；Chun Lei Pu
申请人:Kimberly-Clark Worldwide, Inc.；
IPC主号:

专利说明:

History of the Invention
[1] Absorbent articles, such as sanitary napkins, daily panty protectors, diapers and incontinence pads are devices that are typically used in the genital region of an underwear. Hygienic pads and daily panty protectors, for example, are worn by women in a panty, which is usually positioned between the user's legs, adjacent to the perineum area. Hygienic pads and daily panty protectors are designed to absorb and retain body fluids or discharges (eg menstrual flow) from the woman's body and prevent the wearer's body and clothing from being soiled. Absorbent articles have been developed so that a liquid-permeable top sheet can be positioned against the user's skin and can be configured to move fluid away from the user's skin, so that the skin remains relatively dry. The top sheet may contain several layers that work together with each other to be comfortable for the user's skin while maintaining dryness against the user's skin, providing for quick transfer of fluid away from the user's body. However, the ability of existing topsheets to remain soft against the user's body is often inadequate. For example, when the user walks, the absorbent article is subjected to compressive forces between the user's legs. As a result, peaks and valleys can form on the topsheet and other layers, creating channels where fluid can accumulate, which leads to a flow of fluid towards the edges of the absorbent article. This fluid can leak from the absorbent article, which makes the user's underwear, clothing or bedding dirty.
[2] Meanwhile, absorbent articles also include one or more additional layers below the topsheet that are designed to absorb and retain the liquid that entered the absorbent article. For example, an absorbent core can be used to hold the fluid that has passed through the liquid-permeable top sheet layer to prevent the fluid from contacting the user's skin or leaking out of the edges of the absorbent article. However, when the fluid enters the absorbent core, the absorbent core tends to get wet on its upper surface. This, in turn, decreases the ability of additional fluid to flow downward and outward towards the periphery of the absorbent core. As a result, the additional fluid entering the absorbent article absorbs laterally and leaks out from the edges of the absorbent, instead of moving downward and into the absorbent core. In addition, fluid can accumulate on top of the absorbent article in situations where rapid strokes of fluid are applied to the absorbent article.
[3] To help prevent such leaks and that build-up occurs, it is generally desirable to absorb and retain fluids in a central region of the absorbent article. Attempts have been made to design absorbent articles, for example, which have a thicker (i.e., three-dimensional) absorbent layer positioned in the center of the absorbent article that can capture the fluid at a desired absorbent fluid location. However, such a layer is often bulky and can be uncomfortable for the user, so the volume of the layer can prevent the absorbent article from conforming to the shape of the user's body. Although numerous types of three-dimensional structures have been used in an attempt to improve the fit of absorbent articles against the body and to facilitate the capture of excess liquid, many of these structures can be easily flattened by the compressive forces transmitted during use. This results in an increase in the spread of stains and the inability of the absorbent article to contain the fluid and the corresponding stain in a central area of the structure.
[4] In view of these problems, there is a need for an absorbent article that can absorb and retain fluid in a centralized area of the absorbent article. There is also a need for an absorbent article that can prevent and mask the spread of stains resulting from a fluid emission. In addition, there is a need for an absorbent article with a top sheet that can touch the user's body and conform to the user's body while, at the same time, resisting compression in order to prevent leakage and provide an acceptable level of comfort. Summary of the Invention
[5] According to an embodiment of the present invention, an absorbent article which is generally described extends in a plane defined by a longitudinal and a transverse direction. The article comprises a multilayer, liquid-permeable topsheet, a first sublayer of the topsheet located under the topsheet and a liquid-impervious baffle. The multilayer top sheet defines a contact surface with the body of the absorbent article, while the deflector defines a contact surface with the garment in the absorbent article. The multilayer topsheet extends in the longitudinal direction to define a distal end and an opposite proximal end of the absorbent article and in the transverse direction to define a first edge and a second opposite edge of the absorbent article. In addition, the multilayer topsheet has a length in the longitudinal direction, a width in the transverse direction, a longitudinal center line and a transverse center line. In addition, the multilayer topsheet comprises a first topsheet layer which is arranged above a second topsheet layer.
[6] The first top sheet layer may comprise a non-woven material, and the second top sheet layer may comprise a perforated film, although this is not necessary and both layers may be non-woven materials, both layers may be films, or the first top sheet layer may be a film, while the second top sheet layer may be a non-woven material. The first topsheet layer defines a first opening having a first perimeter, and the first topsheet layer and the second topsheet layer are joined by a seal. The first sublayer of the topsheet is positioned between the second topsheet layer and the deflector. The first sublayer of the top sheet defines a second opening having a second perimeter, and the first perimeter substantially surrounds the second perimeter. However, in other embodiments, the second perimeter can substantially involve the first perimeter in such a way that the second opening is larger (i.e., it has a greater length in the longitudinal direction (x) and a greater width in the transverse direction (y )) than the first opening, such that the entire second opening is not contained in the opening of the first top sheet layer when viewed from the contact surface with the body of the absorbent article in the z direction.
[7] In one embodiment, the first opening may have a substantially ovular shape, while in another embodiment, the first opening may have a complex shape, such as a generally oblong shape, where the perimeter is defined by a or more projections in the longitudinal direction and one or more projections in the transverse direction. In yet another embodiment, the multilayer topsheet comprises a raised region, wherein the raised region substantially surrounds the first opening. The raised region may have a shape that generally corresponds to the perimeter of the first opening.
[8] In addition, the first opening may be in substantial alignment with the longitudinal centerline. In addition, the first opening may be in substantial alignment with the transverse central line or it may be located towards the distal end or proximal end of the first topsheet layer. Regardless of its location, the first opening can have a length ranging from about 15% to about 80% of the length of the first top sheet layer and a width ranging from about 20% to about 80% of the width of the first top sheet layer.
[9] Turning now to the seal between the first top sheet layer and the second top sheet layer, in one embodiment, the seal is generally continuous. The seal can be formed by adhesive bonding, pressure bonding, thermal bonding, ultrasonic bonding, pressure bonding or a combination thereof. In addition, at least a portion of the seal can generally be coextensive with a raised region, if present. In general, the first top sheet layer can be arranged over the second top sheet layer at the distal end, proximal end, first edge and second edge of the absorbent article, and at least one printed graphic can be visible from the surface of contact with the body of the absorbent article along each of the distal, proximal, first and second edges.
[10] In one embodiment, the length of the second topsheet layer ranges from about 30% to about 100% of the length of the first topsheet layer. Meanwhile, the width of the second top sheet layer can vary between about 10% to about 100% of the width of the first top sheet layer.
[11] In yet another embodiment, a first liquid-permeable layer can be positioned between the second top sheet layer and the first top sheet sublayer. In addition, a second liquid-permeable layer can be positioned between the first sublayer of the top sheet and the deflector, where a pattern is printed on the second liquid-permeable layer so that the pattern is visible from the contact surface with the body of the absorbent article. The first and second liquid-permeable layer can be peak layers, transfer layers, distribution layers or combinations thereof. In addition, when countless layers are used, each layer can have a different color, shade, or pattern to further assist the user in placing the absorbent article in the proper position.
[12] In yet another embodiment, a part of the second top sheet layer may be exposed below the first opening so that the exposed part of the second top sheet layer is part of the body contact surface of the absorbent article, and the seal between the two layers can generally correspond to the first perimeter. In addition, the fence can generally be concentric with the first perimeter.
[13] In another embodiment, the second top sheet layer can define a third opening that has a third perimeter, and the first perimeter can substantially surround the third perimeter in such a way that the seal between the first top sheet layer and the second top sheet layer can generally correspond to the first perimeter. On the other hand, the third perimeter can instead substantially surround the first perimeter so that the fence can generally correspond to the third perimeter. In addition, when the first topsheet layer and the second topsheet layer include an opening, the absorbent article further comprises a third topsheet layer that is disposed between the second topsheet layer and the first topsheet sublayer.
[14] In yet another embodiment, an absorbent core can be arranged between the multilayer topsheet and the deflector. In addition, the absorbent core can be placed between the first sublayer of the top sheet and the deflector.
[15] In yet another embodiment, the absorbent article further comprises a second top sheet sublayer positioned between the first top sheet sublayer and the deflector. The second top sheet sublayer can define a fourth opening having a fourth perimeter. In addition, the second top sheet sublayer may have a shape that includes a first protrusion facing the first edge in the transverse direction and a second protrusion facing the second edge in the transverse direction, where the protrusions are visible from the surface of contact with the body of the absorbent article.
[16] In a further embodiment, the absorbent article comprises a third top sheet sublayer positioned at the distal end of the absorbent article between the second top sheet layer and the deflector. In this embodiment, the first topsheet layer defines a fifth opening having a fifth perimeter in which the third topsheet sublayer exists in the same plane as the first topsheet sublayer. In addition, the third topsheet sublayer is substantially ovular in shape.
[17] In another embodiment, the present disclosure is directed to an absorbent article that generally extends in a plane defined by a longitudinal and a transverse direction. The absorbent article comprises, in sequential order from a contact surface with the body to a contact surface with the garment, the following: a liquid-permeable multilayer top sheet, a first liquid-permeable peak layer, a top sheet sublayer, a second liquid-permeable peak layer, an absorbent core and a deflector. The liquid-permeable multilayer topsheet comprises a first topsheet layer disposed above a second topsheet layer, wherein the first topsheet layer defines a first opening having a first perimeter, wherein the first topsheet layer and the second top sheet layer is joined by a seal, and yet the multilayer top sheet extends in the longitudinal direction to define a distal end and an opposite proximal end of the absorbent article and in the transverse direction to define a first edge and a second opposite edge of the absorbent article. Meanwhile, the sublayer of the top sheet defines a second opening having a second perimeter, in which the first perimeter substantially surrounds the second perimeter. In addition, a pattern is printed on the second liquid-permeable peak layer in such a way that the pattern is present on the first top sheet layer and visible from the contact surface with the body of the absorbent article. In addition, at least one printed graphic is visible from the contact surface with the body of the absorbent article along each of the distal, proximal, first edge and second edge of the absorbent article.
[18] Other properties and aspects of the present invention will be discussed in more detail below. Brief Illustration of the Figures
[19] A complete and illuminating description of the present invention, including its best mode, aimed at people with technical knowledge in the field, is demonstrated in more detail in the rest of the specification, which makes reference to the attached figures in which:
[20] Fig. 1 is a perspective view of an embodiment of the absorbent article of the present invention;
[21] Fig. 2 is a top view of Fig. 1;
[22] Fig. 3 is an exploded perspective view of Fig. 1;
[23] Fig. 4 is a perspective view of an embodiment of the absorbent article of the present invention;
[24] Fig. 5 is a top view of Fig. 4;
[25] Fig. 6 is an exploded perspective view of Fig. 4;
[26] Fig. 7 is a top view of an embodiment of the absorbent article of the present invention;
[27] Fig. 8 is a top view of another embodiment of the absorbent article of the present invention;
[28] Fig. 9 is a top view of another embodiment of the absorbent article of the present invention;
[29] Fig. 10 is a side view of an embodiment of a perforated three-dimensional film that can be used in the absorbent article of the present invention;
[30] Fig. 11 is a top view of another embodiment of the absorbent article of the present invention;
[31] Fig. 12 is an exploded view of another embodiment of the absorbent article of the present invention;
[32] Fig. 13 is an exploded view of another embodiment of the absorbent article of the present invention;
[33] Fig. 14 is an exploded cross-sectional view of another embodiment of the absorbent article of the present invention, taken on the transverse centerline;
[34] Fig. 15 is a cross-sectional view of an embodiment of the absorbent article of Fig. 14 once assembled;
[35] Fig. 16 is an exploded cross-sectional view of another embodiment of the absorbent article of the present invention, taken on the transverse centerline;
[36] Fig. 17 is a cross-sectional view of an embodiment of the absorbent article of Fig. 16, assembled;
[37] Fig. 18 is an exploded cross-sectional view of another embodiment of the absorbent article of the present invention, taken on the transverse centerline;
[38] Fig. 19 is a cross-sectional view of an embodiment of the absorbent article of Fig. 18, assembled;
[39] Fig. 20 is a top view of another embodiment of the absorbent article of the present invention;
[40] Fig. 21 is a perspective view of Fig. 20;
[41] Fig. 22 is a top view of another embodiment of the absorbent article of the present invention;
[42] Fig. 23 is an exploded perspective view of Fig. 22;
[43] Fig. 24 is an exploded cross-sectional view of another embodiment of the absorbent article of the present invention, taken on the transverse centerline;
[44] Fig. 25 is a cross-sectional view of an embodiment of the absorbent article of Fig. 24, assembled;
[45] Fig. 26 is an exploded cross-sectional view of another embodiment of the absorbent article of the present invention, taken on the transverse centerline;
[46] Fig. 27 is a cross-sectional view of an embodiment of the absorbent article of Fig. 26, assembled;
[47] Fig. 28 is an exploded cross-sectional view of another embodiment of the absorbent article of the present invention, taken on the transverse centerline; and
[48] Fig. 29 is a cross-sectional view of an embodiment of the absorbent article of Fig. 28, assembled.
[49] The repeated use of reference characters in this specification and in the drawings is intended to represent the same or analogous characteristics or elements of the invention. Detailed Description of Representative Forms of Realization Definitions
[50] As used herein, "body contact" refers to the surface facing outwardly of the absorbent article that is intended to be disposed towards or placed adjacent to the user's body during normal use. This surface can be defined by a multilayer topsheet having one or more layers, which also includes an opposite inward facing surface.
[51] As used in this document, “in contact with the garment” refers to the surface facing outward from the absorbent article that is intended to be disposed away from the user's body during normal use. The surface is typically placed adjacent to the wearer's underwear when the item is worn. This surface can be defined by a deflector, which also includes an opposite inward facing surface. Detailed Description
[52] Detailed references will be made to various configurations of the invention, with one or more examples described below. Each example is provided by way of explanation of the invention, without limitation to the invention. Indeed, it will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. For example, features illustrated or described as part of one embodiment, can be used in another application to produce yet another embodiment. Thus, it is intended that the present invention covers modifications and variations that are within the scope of the attached claims and their equivalents.
[53] In general, the present invention is directed to a feminine hygiene absorbent article, such as a sanitary napkin capable of molding to the user's body, can be comfortable against the user's skin, and can provide the user with a visual indication for the correct placement of the absorbent article, while at the same time acting to maintain a high level of dryness and inhibit the leakage of body fluids at the peripheral edges of the absorbent article.
[54] The absorbent article, which includes a multilayer topsheet, at least a first sublayer of the topsheet, and a liquid impervious baffle, generally extends in a plane defined by a longitudinal direction to define a longitudinal center line, a distal end and opposite proximal end, and a transverse direction to define a transverse centerline, a first edge and a second edge. The multilayer topsheet, which defines a contact surface with the body of the absorbent article, has two zones and includes at least one first topsheet layer which is above a second topsheet layer. It should be understood that, so that the two layers can be in direct contact with each other in some embodiments, while in other embodiments, one or more layers of absorbent article can be placed between the first sheet layer top and the second top sheet layer. The first top sheet layer includes an opening defined by a perimeter that may leave part of the second top sheet layer exposed. However, it should also be understood that the second top sheet layer may also include an opening defined by a perimeter, where the opening is located below the opening of the first top sheet layer. The opening of the second top sheet layer may be smaller than the opening of the first top sheet layer such that, when the opening of the second top sheet layer is located below the opening of the first top sheet layer, a portion of the the second layer of top sheet remains exposed on the surface of contact with the body of the absorbent article, and thus the second layer of top sheet can touch the skin of the user and form part of the surface of contact with the body of the absorbent article. On the other hand, in another embodiment, the opening of the second top sheet layer may be larger than the opening of the first top sheet layer, such that when the opening of the second top sheet layer is located below the opening the first top sheet layer, the second top sheet layer is not exposed. Instead, a third layer of topsheet may be present, and exposed on the surface of contact with the body of the absorbent article, so that the third layer of topsheet may be in contact with the wearer's skin and form part of the surface. contact with the body of the absorbent article. In addition, the openings of the first and second topsheet mentioned above may have simple shapes or more complex shapes. For example, an opening may have a complex oblong shape, where the perimeter of the opening is defined by one or more projections in the longitudinal and / or transverse (y) direction. In general, the openings of the first and second topsheet layers act to move fluids away from the user's skin and towards the lower layers of the absorbent article which are positioned below the multilayer topsheet in the z direction through a funnel effect. In addition, the openings can allow the multilayer topsheet to fit the user's body, creating a means by which the multilayer topsheet can fold. In addition, the openings can also provide a visual indication for the correct placement of the absorbent article.
[55] It should be understood that the first top sheet layer and the second top sheet layer can be made of any suitable top sheet material or combination of materials. Suitable materials include non-woven materials, woven materials, liquid-permeable films, etc. It should also be understood that the first topsheet layer and the second topsheet layer can be made of the same material or material combinations suitable for the top sheet layer. If one of the topsheet layers includes a film, the film can be perforated to give the film liquid permeability. The openings in the film can work to draw body fluids away from the user's skin to keep a top sheet dry against the user's skin. In addition, regardless of the material or combination of materials used for the first top sheet layer or the second top sheet layer, the material or combination of materials can be comfortable and smooth against the user's skin.
[56] In addition, when the opening of the first top leaf layer is greater than the opening of the second top leaf layer or when there is no opening of the second top leaf layer, the first top leaf layer and the second layer topsheet can be joined by a seal which generally corresponds to parts of the perimeter of the opening of the first top sheet layer that overlap with the second top sheet layer. However, if the second topsheet layer has an opening located below the opening of the first topsheet layer, that opening of the second topsheet is larger than the opening of the first topsheet layer, then the first topsheet layer and the second top sheet layer can be joined by a seal which generally corresponds to parts of the perimeter of the opening of the second top sheet layer that overlap the top sheet layer. In addition, the first top sheet layer and the second top sheet layer are sealed in such a way that the area in which the two layers are sealed generally has the appearance and feel of a single, continuous layer instead of two separate layers. that have been sealed together.
[57] In addition to having a first top sheet layer and a second top sheet layer, the multilayer top sheet may include at least one raised region. The embossed region can be located on the absorbent article so that at least part of the seal between the first topsheet layer and the second topsheet layer is generally coextensive with the embossed region. It should also be understood that, in some cases, it may be possible for the embossed region to form the seal between the first and the second layer of the topsheet, although in general, the seal and the embossed regions are separated. The raised region can provide an aesthetically pleasing appearance to the multilayer topsheet and also creates a channel to direct fluid flow out of the periphery of the topsheet to prevent aggregation of fluids at the contact points along the multilayer topsheet.
[58] Meanwhile, the absorbent article also includes a deflector that defines a contact surface with the garment of the absorbent article and a first sublayer of the top sheet that is positioned between the multilayer top sheet and the deflector. It should be understood that, however, the other layers can be arranged between the multilayer topsheet and the first topsheet sublayer, and between the first topsheet sublayer and the deflector, such as topsheet layers, absorption layers fluid layers, peak layers, transfer layers, distribution layers and absorbent core layers, all of which may or may not have additional openings to further improve the absorbent article's ability to channel the fluid to a desired location in the absorbent article. In addition, in some cases, the first topsheet sublayer may actually be located between the first topsheet layer and the second topsheet layer so that the second topsheet layer is positioned below the first sublayer of the top sheet. top sheet in the z direction. In this case, the first topsheet layer and the second topsheet layer can interleave the first topsheet sublayer.
[59] In general, the first sublayer of the top sheet defines an opening of the first sublayer of the top sheet that is located under one or more of the openings of the multilayer top sheet layer in the Z direction out of the contact surface with the body. absorbent article. Regardless of the structure of the first sublayer of the top sheet, the opening of the first sublayer of the top sheet is used in conjunction with the opening of the first layer of the top sheet and / or the opening of the second layer of the top sheet to create a funnel-shaped configuration. to attract even more fluid towards a desired location in the absorbent article, such as a central region of the first sublayer of the topsheet or the absorbent core. For example, the first sublayer of the top sheet and its defined opening can create a structure similar to a well or cup to contain the fluid. The absorbent article may also include additional layers disposed between the second top layer layer of the multilayer topsheet and the deflector, such as additional layers of the multilayer topsheet, additional layers of the absorbent core, fluid absorption layers, distribution layers, layers transfer layers, peak layers, etc.
[60] Now, with reference to Figs. 1-27, various embodiments of a feminine hygiene absorbent article of the present invention will be described. As shown in general, the feminine hygiene absorbent articles 100-1200 of Figs. 1-4 and 11-27 include a multilayer topsheet 138 which generally overlaps a baffle 130. The multilayer topsheet 138 has a first topsheet layer 106 which is arranged above a second topsheet layer 108. In addition , the absorbent articles include a first sublayer of the topsheet 116 having an opening 150 such that the opening 150 is within and is generally surrounded or shaped by the area created by any openings in any of the layers 106 or 108 of the multilayer topsheet . The first sublayer of the top sheet 116 may be an additional top sheet layer, a peak layer, a fluid absorbing layer, an absorbent core layer, a fluid distribution layer, or any other layer suitable for use in an article. pad. It is to be understood that the absorbent article can optionally include other layers in addition to the multilayer topsheet 138, the first sublayer of the topsheet 116 and the deflector 130, such as, for example, peak layers 120 and 126, a sublayer of the topsheet distal end 168 such as absorbent core 128, fluid absorbing layers, distribution layers, transfer layers, additional top sheet sublayers, etc. The components and characteristics of the absorbent article of Figs. 1-27 are discussed in more detail below.
[61] First, the multilayer topsheet 138 provides comfort to the user as it is designed to adapt to the user's body and also has an aesthetically pleasing appearance, while serving to direct the body exudates away from the surface in contact with the body 144 of the absorbent article and towards the lower layers of the absorbent article, such as a sublayer of top sheet or absorbent core, which are positioned below the multilayer top sheet 138 in the z direction. The multilayer topsheet 138 is liquid-permeable and generally extends along the surface of contact with the upper body of the baffle 130 with the peripheral edges of the absorbent article. The multilayer topsheet 138 defines a distal end 102 and an opposite proximal end 104 in the longitudinal direction (x), as well as a first edge 132 and a second opposite edge 134 in the transverse direction (y) of the absorbent article. The multilayer topsheet 138 also defines a longitudinal centerline CL and a transverse centerline CT. Although the proximal and distal ends are shown here as the front and rear ends, respectively, the terms "proximal" and "distal" do not necessarily refer to the front and rear ends of the top sheet, as these terms are used only for the sake of convenience. In any case, the shape of the proximal and / or distal ends and / or edges of the topsheet can be configured to help improve the comfort of the article during use.
[62] In general, the multilayer topsheet 138 is constructed from liquid-permeable materials known in the art that are easily penetrated by body exudates. As described above, the multilayer topsheet 138 may include at least two layers, and each layer may comprise several layers of materials. Regardless of the number of layers used, the multilayer topsheet 138 typically has a basis weight of less than about 100 grams per square meter (gsm), and in some embodiments, between about 10 gsm to about 60 gsm. In the particular embodiments described in the present disclosure, the multilayer topsheet 138 defines a contact surface with the body 144 of the absorbent article and includes at least (1) a first layer of topsheet 106 that defines at least one opening 148, and (2) a second top sheet layer 108 that may or may not be exposed during opening in the first top sheet layer 106 depending on whether the second top sheet layer 108 has an opening located below the opening of the first top sheet layer 148. As shown in Figs. 3, 6, 12 and 13, the first topsheet layer 106 is disposed directly above the second topsheet layer 108 in the z direction, where additional layers are present under the second topsheet layer 108 and toward a absorbent layer in the Z direction. However, it should be understood that the multilayer topsheet 138 may include other additional layers that may or may not have openings and that may be located between the first topsheet layer 106 and the second topsheet layer. 108, as shown in Figs. 18-19 and 26- 27. The first top sheet layer 106, the second top sheet layer 108, and any additional layers can be manufactured from a combination of a wide variety of materials, such as, for example, materials fabrics, non-woven fabrics, perforated non-woven fabrics, porous foams, reticulated foams, perforated plastic films and laminates of these materials.
[63] For example, the first topsheet layer 106, the second topsheet layer 108 and / or any additional layers in the multilayer topsheet may include a nonwoven material. The non-woven material can be a meltblown weave, a spunbond weave, a hydro-matted weave, a linked carded weave, a carded and thermally bound weave, a spunbond weave of bicomponent fibers or a linked carded weave of bicomponent fibers. In addition, the first top sheet layer can be made of nylon, polyester, polyolefins such as polypropylene or polyethylene, polypropylene and polyethylene copolymers, low density linear polyethylene, aliphatic esters such as polylactic acid, heat-bondable fibers or combinations thereof. A specific example of material suitable for the first top sheet layer 106, the second top sheet layer 108 or any additional layers in the multilayer top sheet is a bonded carded web made of polypropylene and polyethylene, such as that used as a sheet raw material top of the daily KOTEX® pant protectors, marketed by Sandler AG (Germany). It is to be understood that one or both of the topsheet layers 106 and 108 can be formed from a non-woven material. In addition, if the first top sheet layer 106 and the second top sheet layer 108 are made of a non-woven material, the second top sheet layer 108 may have additional three-dimensional characteristics, perforations or other characteristics to improve the dryness level. transmitted to the absorbent article in the area of the second topsheet layer 108 compared to the first topsheet layer 106.
[64] In another embodiment, the first topsheet layer 106, the second topsheet layer 108 or any additional layers in the multilayer topsheet may include a film. The film can be made of any suitable polymer. Suitable polymers that can be used to form any multilayer topsheet layer 138 include any material that can be formed into a film, including, but not limited to, polyolefins and polyacrylates, as well as copolymers and mixtures thereof. For example, polymers to form any multilayer topsheet layer include, but are not limited to, polyethylene, low density polyethylene, linear low density polyethylene, polypropylene, polyvinyl chloride, polyvinyl alcohol, ethylene vinyl acetate, resins based on starch, cellulose esters, polyurethanes, polycaprolactone or combinations thereof. A specific example of a material suitable for any of the layers of the multilayer topsheet is a three-dimensional, perforated film made of polyethylene. For example, the film may be a perforated film with openings that are tapered capillaries. In addition, the film may have a runoff percentage less than about 10 percent and a greater flow of liquid through the tapered capillaries. The method of making such a film may include a surface treatment, although such treatment is not necessary.
[65] Referring now to Fig. 10, a film that can be used as the first top sheet layer 106, the second top sheet layer 108, or any other layer of the absorbent article is shown. The first topsheet layer 106 or the second topsheet layer 108 can be a three-dimensional film structure having a plurality of perforations 146, each of which can be tapered to have a base 156 (i.e., the widest point of the opening), and a vertex 158 (that is, the narrowest point of the opening). The apex 158 of the openings 146 may be in contact with any other suitable lower layer 172 of the absorbent article. Meanwhile, the bases 156 of the openings 152, which are wider than the vertices 158, may be in contact with an upper layer (if any) of the absorbent article. For example, when the film is used as the first topsheet layer 106, the vertices 158 may be in contact with the second topsheet layer 108 or any layer between the first topsheet layer 106 and the second topsheet layer 108 in the z direction, while the bases 156 may be located on the body contact surface 144 of the absorbent article. However, if the film is used as the second top sheet layer 108, the vertices 158 may be in contact with the first top sheet sublayer 116 or any other layer below the second top sheet layer 108 in the z direction, such as a additional top sheet layer, peak layer, absorbent core layer, absorption layer, distribution layer, etc., while bases 156 may be in contact with the first top sheet layer 106 or any layer between the second top sheet layer 108 and the first top sheet layer 106 in the z direction.
[66] In another embodiment, the first topsheet layer 106 and / or the second topsheet layer 108 may include a film made of thermoplastic material that is provided by several perforations 146 that resemble tapered capillaries. The first topsheet layer 106 and / or the second topsheet layer 108 may also include other types of perforated plastic films that are not thermoplastics. The type of film used depends on the type of processing that the first topsheet layer 106 and the second topsheet layer 108 are undergoing during the manufacture of the multilayer topsheet 138. For example, thermoplastic films can be used as the first layer of topsheet 106 and second topsheet layer 108, when the first topsheet layer 106 and the second topsheet layer 108 are integrally formed in a melt structure. Other types of perforated films include, but are not limited to, hydroformed films.
[67] Generally, the three-dimensional perforated film, which can be used in any layer of the multilayer top sheet, can have a total thickness between about 5 micrometers and 1000 micrometers, as well as from about 10 micrometers to about 500 micrometers, such as from about 25 micrometers to about 250 micrometers. As shown in Figs. 3, 6, and 10, several perforations 146 may extend through the first topsheet layer 106 or the second topsheet layer 108 to allow fluid to flow through the multilayer topsheet 138. The perforations create passages through of the layers of the absorbent article away from the body contact surface 144 so that the fluid is received by one or more additional layers through which it can flow, such as a first sublayer of the topsheet 116 or an absorbent core 128. In addition , the openings 146 may be located or extend across the entire surface of the first topsheet layer 106 or the second topsheet layer 108, which is shown in the embodiment of Figs. 3 and 6. The number and size of perforations 146 can be controlled in such a way that the first topsheet layer 106 and / or the second topsheet layer 108 have a percentage opening area, due to the presence of the perforations between about 10% and about 80% based on the surface area of the first top sheet layer or second top sheet layer, such as from about 15% to about 60%, such as from about 20% to about 40%, excluding the opening of the first top sheet layer 148 or the opening of the second top sheet layer 162 (see Figures 12 and 13). The percentage perforation area is calculated by specifying a unit area, calculating the surface area of the openings 146 within the specified area unit, dividing this total perforation area by the total surface area within the specified unit area, excluding opening the first top sheet layer 148 or opening the second top sheet layer 162, and then multiplying the quotient by 100, to determine the percentage of perforation area.
[68] Furthermore, it is to be understood that the first topsheet layer 106 and / or the second topsheet layer 108 can be equipped with perforations 146 having any suitable shape. For example, perforations 146 can be hexagonal, circular, ovular, elliptical, polygonal, or any other suitable pattern or combination of shapes. In addition, each perforation 146 has an average diameter of about 50 microns to about 1500 microns, such as from about 100 microns to about 1000 microns, such as from about 200 microns to about 800 microns, where the diameter is large enough to allow emission fluids to be acquired through the three-dimensional perforated film as quickly as they are emitted.
[69] In addition, perforations 146 can be arranged in any suitable pattern to impart the desired amount of stability and fluid transfer properties to the multilayer topsheet 138. The pattern can also be chosen such that it has an aesthetically pleasing appearance. nice. For example, in one embodiment, perforations 146 may be formed in a three-dimensional honeycomb pattern, such that the film has sufficient stability to prevent the collapse of the three-dimensional structure during use of the absorbent article, although it is to be understood that other patterns are also useful. The honeycomb pattern of the perforated three-dimensional film can be transmitted to the film using a metal screen with hexagonal holes. The materials used to form the film and / or film thickness can be adjusted to provide the desired stiffness and also provide the desired smoothness of the resulting film texture, since it is used in the multilayer top sheet 138, which comes in contact with the user's skin.
[70] Generally, the three-dimensional film with perforations can be made by any suitable process. For example, the film can be made by a thermoforming process. In the case of a thermoforming process, a molten film is extruded over a molding area of a molding screen. A pressure differential applied through the molding screen causes the molten film to conform to the three-dimensional shape of the molding screen (that is, a hexagonal shape to form a honeycomb pattern) to form the cells that break at their ends to become perforations. Alternatively, the film can be reheated and partially melted, while it is over the molding area of the molding web. A molten polymer is desirable to mold three-dimensional perforations, since a molten polymer is more easily pulled into the perforations on a molding screen. The three-dimensional perforated films of the present invention can also be formed by a hydroformed film (HFF) process. In an HFF process, hydraulic pressure, in the form of water jets, collides with a film as it passes through the molding area of a molding screen. The force of the water at high pressure causes the film to adjust to the three-dimensional shape of the molding screen to form cells that break at its ends to become perforations.
[71] Numerous embodiments of the absorbent article of the present invention will now be discussed in more detail. As shown in Figs. 1, 3, 4, 6, 12, 13, 21 and 23, the multilayer topsheet 138 defines a contact surface with the body 144 of the absorbent article and includes a first layer of topsheet 106 which is disposed above the second layer of topsheet 108 in the z direction, which is then disposed below the first top sheet layer 106 in the z direction. The first topsheet layer 106 can include any of the top sheet materials discussed above, and the first topsheet layer 106 can also include a combination of any of these materials, such as in a laminated form.
[72] The dimensions of the first topsheet layer 106 may vary depending on the particular need for which the absorbent article is being used. Generally, the length of the first top sheet layer 106 in the longitudinal direction (x) is about 100 mm (mm) to about 450 mm, or about 150 mm to about 400 mm, or about 200 mm at about 380 mm. In addition, the width of the first top sheet layer 106 in the transverse direction (y) (excluding any optional flap) is about 60 mm to about 200 mm, or about 70 mm to about 175 mm, or about 80 mm to about 150 mm. Accordingly, the first topsheet layer 106 can have a basis weight of about 50 gsm, such as from about 10 gsm to about 40 gsm. The first top sheet layer 106 defines the contact surface with the body 144 of the absorbent article and because of the material from which it is formed, it can provide a soft and comfortable material for the user's skin.
[73] As shown at least in Figs. 1-9, 11-13 and 20-23, the first topsheet layer 106 also defines an opening 148 having a perimeter 114a, 114b or 114c. The perimeter 114a, 114b or 114c forms the inner edge or inner end of the first topsheet layer 106, leaving an opening 148 through which at least a part of the second topsheet layer 108 can be exposed and visible due to the absence of the first top sheet layer 106 in opening 148, as shown in Figs. 3, 6, 12, 14-17, 23-27. However, it should be understood that in some embodiments, as in Fig. 13, the second top sheet layer 108 cannot be exposed in the opening 148 if the opening of the second top sheet layer 162 is larger than the opening of the top sheet. first top sheet layer 148. In any case, opening 148 in the first top sheet layer 106 helps to direct body fluids away from the user's body and towards an absorbent layer in the absorbent article, such as the sheet sublayer top 116, which is disposed below the first top sheet layer 106 in the z direction. Opening 148 also allows the multilayer topsheet 138 to be folded and fits the user's body to prevent fluid leakage due to the formation of peaks and valleys in the multilayer topsheet by introducing compressive forces.
[74] Opening the first top sheet layer 148 in Figs. 1-9 and 11-27, can be located in various positions along the longitudinal and transverse directions of the first topsheet layer 106, depending on the primary fluid inlet location or the purpose for which the absorbent article is being used. For example, in the embodiment shown in Figs. 1 and 4, the opening of the first topsheet layer 148 is positioned so that it is in substantial alignment with the longitudinal centerline CL and the transverse centerline CT. It should be understood that the longitudinal centerline CL is arranged in a location that is equidistant from the first edge 132 and second edge 134 and runs along the length of the first top sheet 106 in the longitudinal direction (x), while the transverse centerline CT is arranged in a location that is equidistant from the distal end 102 and proximal end 104 and runs along the width of the first topsheet 106 in the transverse direction (y). This configuration allows opening 148 to be arranged centrally, so that it can be positioned below the main fluid discharge point, and so that it can act as the main fluid receiving area of the multilayer top sheet 138. Thus, the opening of the first top sheet layer 148 can be used to direct body fluids to a central location in the absorbent article away from the surface of contact with the body 144 of the absorbent article in the z direction, which can reduce the risk of fluid leakage when a fluid emission at a central location in the absorbent article 100 or 200.
[75] However, centralized positioning of the opening of the top layer of the top sheet 148 is not necessary, and in some embodiments, depending on the main location where fluid intake may occur, the opening 148 may be substantially aligned with the longitudinal axis CL only. Thus, the opening of the first top sheet layer 148 can be displaced in the longitudinal direction (x) or towards the distal end 102, or proximal end 104 of the first top sheet layer 106, so that the opening of the first sheet layer upper 148 is not in substantial alignment with the transverse centerline CT as shown in Figs. 7 and 11. Such particular embodiments are discussed in more detail below.
[76] For example, the opening of the first topsheet layer 148 can be displaced towards the proximal end 104 of the first topsheet layer 106 such that the center of the opening 148 is not substantially aligned with the transverse centerline CT of the absorbent article in the longitudinal direction (x), although the opening 148 is substantially aligned with the longitudinal central line CL in the transverse direction (y). In another embodiment (not shown), the opening 148 defined by the perimeter 114a or 114b can be displaced towards the distal end 102 of the absorbent article, again depending on the primary location where fluid absorption can occur.
[77] Generally, the opening of the first topsheet layer 148 may have a complex closed or simple shape based on the shape of perimeter 114a, 114b or 114c, for example. For example, the perimeter can be a complex shape, such as the perimeter 114a of Figs. 1-3 or Figs 114c. 20-23. The perimeter 114a of the Figures. 1-3 is a complex shape that is generally oblong and defined as having one or more projections, such as several projections 184 located along the longitudinal direction (x) and multiple projections 186 located along the transverse direction (y). The presence of protrusions 184 and 186 at perimeter 114a results in an opening of the first top sheet layer 148 which has corresponding protrusions, and these protrusions allow the first top sheet layer 106 to fold and adjust to the genital region of the user's body, which can provide a tight fit and prevent compression forces from forming peaks and valleys in the absorbent article, which can lead to leaks and clumping. Meanwhile, the perimeter 114c of Figs. 20-23 is also a complex shape, and in this case, perimeter 114c has a protrusion 184 located along the longitudinal direction (x) going towards the first edge 132 and another protrusion 184 located along the longitudinal direction (x ) going towards the second edge 134 of the absorbent article. These two projections 184 create an opening 148 with corresponding protuberances along the transverse direction (y). It should be noted that a greater number of protrusions, such as four or more, six or more, eight or more, may be required at perimeter 114a to allow the first top sheet layer 106 to bend sufficiently to fit the user's body while perimeter 114c may require two projections to allow the first top sheet layer 106 to bend sufficiently to fit the user's body, due to the small opening 148 formed by perimeter 114c.
[78] In any case, the perimeter 114a or 114c may form an opening 148 that has a length in the longitudinal direction (x) that is from about 50 mm to about 300 mm, such as from about 75 mm to 275 mm , such as from about 100 mm to about 250 mm. The perimeter 114a or 114c can also form an opening 148 which has a width in the transverse direction (y) at its widest point which is about 20 mm to 100 mm, such as about 25 mm to 90 mm, such as from about 30 mm to about 80 mm. In addition, the aperture 148 defined by the perimeter 114a or 114c can have a length of about 15% to about 80%, such as from about 20% to about 75%, such as from about 25% to about 70% of the overall length of the first top sheet layer in the longitudinal direction (x). The aperture 148 defined by the perimeter 114a or 114c can also have a width of about 20% to about 80%, such as from about 25% to about 75%, such as from about 30% to about 70% the overall width of the first top sheet layer in the transverse direction (y), excluding any optional flap parts.
[79] Meanwhile, in the embodiment of Figs. 4-6, perimeter 114b has a simpler shape, and specifically has a smaller, smoother, and substantially ovular shape when compared to perimeters 114a and 114c. More specifically, the shape of perimeter 114b can be described as a rectangle with semicircular ends or in the form of a racetrack. Unlike perimeter 114a or perimeter 114c, perimeter 114b is devoid of protrusions, since its smaller dimensions mean that it does not need to bend to help shape and fit the body. In general, perimeter 114b can form an opening 148 that has a length in the longitudinal direction (x) that is from about 25 mm to about 200 mm, such as from about 50 mm to 175 mm, such as about 75 mm to about 150 mm. Perimeter 114b can also form an opening 148 that has a width in the transverse direction (y) that is from about 20 mm to 100 mm, such as from about 25 mm to 90 mm, such as from about 30 mm to about 80 mm. In addition, the aperture 148 defined by perimeter 114b can be from about 15% to about 80% in length, such as from about 20% to about 75%, such as from about 25% to about 70% the overall length of the first top sheet layer in the longitudinal direction (x). The aperture 148 defined by perimeter 114b can also have a width of about 20% to about 80%, such as from about 25% to about 75%, such as from about 30% to about 70% of the width general view of the first top sheet layer in the transverse direction (y), excluding any optional flap parts.
[80] Although perimeters 114a, 114b and 114c are generally shown in Figs. 1-9 and 20-23 as a complex oblong shape with multiple protrusions (Figs. 1-3), a simpler, substantially ovular shape (Figs. 4-9), or a complex shape that is generally ovular but has protrusions forms two protrusions in the absorbent article (Figs. 20-23), the perimeter 114a, 114b or 114c can be of any suitable shape, as it is necessary to create an opening 148 that can attract or direct direct body fluids, moving them away the user's skin and maintains fluids while they are being transferred away from the body contact surface 144 of the absorbent article towards several lower layers of the absorbent article in the z direction. The shape of the perimeter and opening it defines can also provide a visual indication to the user to assist in the proper positioning of the absorbent article. For example, perimeters 114a and 114b can be rectangular, square, circular, elliptical, dog bone shaped, triangular or diamond-shaped.
[81] In addition, as shown in Fig. 11, when the opening of the first topsheet layer 148 is displaced towards the proximal end 104 of the first topsheet layer 106 as mentioned above, an opening of the first topsheet layer the distal end 164 defined by the perimeter of the distal end 166 may be present in the direction of the distal end 102 of the first top sheet layer 106. In particular, the absorbent article 300 of Fig. 11 can be used as a nighttime absorbent and can provide additional protection against stains on clothing or sheets during the night use of the absorbent article, due to the presence of two discrete openings 148 and 164 in the first top sheet layer 106 which can direct the flow to different locations in the absorbent layers of the article. Such nighttime pads are often designed with long periods to provide coverage for the vaginal area (towards the proximal end 104) and the buttock area (towards the distal end 102) during sleep. These pads often include a wider distal end area to completely cover the buttocks.
[82] It should be understood that, although the opening of the first upper leaf layer of the distal end 164 is shown in Fig. 11 as having a simple shape, generally ovular, the opening 164 can be in any suitable form, as discussed above with reference to opening the first top sheet layer 148, such as a complex shape. In addition, it should be understood that the perimeters 114a, 114b, 114c and 166 and can be formed by any suitable method to form an opening 148 or 164 in the first top sheet layer 106, such as by blade cutting, laser cutting or die cut.
[83] Furthermore, regardless of the shape or size of the opening 148 formed by the perimeter 114a, 114b or 114c, at least part of the first top sheet layer 106 is present from the perimeter 114a, 114b or 114c of the first top sheet layer 106 to the outer periphery of the absorbent article towards the distal end 102, proximal end 104, first edge 132 and second edge 134. Additionally, at least a part of the material of the first topsheet layer 106 is present from the perimeter of the distal end 166 from the first top sheet layer 106 to the outer periphery of the absorbent article, towards the distal end 102, proximal end 104, first edge 132 and second edge 134. Thus, the first top sheet layer 106 is positioned above the second layer top sheet 108 in the Z direction so that the second top sheet layer 108 is exposed only (if it is exposed) at the opening 148 defined by perimeter 114a or 114b or optional opening 164 of the first top sheet layer 106.
[84] Due to the configuration of the multilayer topsheet 138 discussed above, in which the first topsheet layer 106 completely envelops the second topsheet layer 108, at least one printed graphic 124 can be printed anywhere near the periphery of the article absorbent in the first top sheet layer 106, although such an impression is not necessary. In addition, it is to be understood that the printed graphics 124 can be printed on a contact surface with the body 144 of the absorbent article, as defined by the first top sheet layer 106 or an opposite surface facing inwards of the first sheet layer upper 106 which faces the deflector or other lower layers of the absorbent article in the z direction. In addition, the printed graphics 124 can be printed on any other layer of the multilayer topsheet 138 and on the entire surface, provided that the printed graphics 124 are visible from the contact surface with the body 144 of the absorbent article. In addition, printed graphics 124 may be printed in layers in addition to or in addition to the multilayer topsheet 138, such as a peak layer, distribution layer, transfer layer, absorption layer, absorbent layer, etc., provided that the printed graphics 124 are visible from the surface in contact with the body 144 of the absorbent article. When the printed graphics 124 are visible from the surface in contact with the body 144 of the absorbent article, the overall aesthetic appearance of the absorbent article can be improved. In addition, printed graphics 124 can also function to mask the visible stains on the absorbent article and can be used in conjunction with any of the openings in the various layers of the absorbent article, to provide a visual indication of the proper placement of the absorbent article, once that printing around aperture 148 or 164 can make the aperture more visible.
[85] For example, at least one printed graphic 124 can be visible from the contact surface with the body 144 of the absorbent article and can be printed from the perimeter 114a, 114b or 114c of the opening 148 to the periphery of the absorbent article at each one of the distal end 102, proximal end 104, first edge 132 and second edge 134. As shown in Figs. 2, 5 and 7-9, printed graphics 124 can be of any aesthetically pleasing pattern. In addition, printed graphics 124 can be colored. Furthermore, it should be understood that the printed graphics 124 can be printed on a surface of the first top sheet layer 106, so that the surface defining the contact surface with the body of the absorbent article or the contact surface with the second top sheet layer 108. In addition, if the first top sheet layer 106 includes multiple layers or types of material, printed graphics 124 can be printed on any layer or material, as long as printed graphics 124 are visible from the contact surface with the body 144 of the absorbent article, as defined by the first top sheet layer 106.
[86] In addition, printed graphics 124 can be symmetrical or asymmetrical on a central axis in the longitudinal direction (x), in the transversal direction (y), or both, through the use of objects of different sizes, colors, shapes and designs . In the embodiments of Figs. 7-9, for example, the asymmetric nature of the printed graphics 124 can allow the color or stain of the body fluid to mix better with the visual nature of the patterns, and also distract the user's attention from areas where possible stains may be visible, such as opening the first top sheet layer 148.
[87] Asymmetry in the printed graphics 124 described above can be provided in a variety of ways, such as through the use of printed graphics 124 that have different sizes, colors, shapes and designs. Such asymmetry performs the dual functions of providing a unique and distinct "pre-use" visual appearance, and providing a "post-use" visual appearance that can mask stains after the product has been used. Asymmetry indicates that the patterns do not have simple symmetry such as reflection, rotation and translation symmetries and, preferably, they do not have plane, rotoreflection, helical or non-isometric reflection symmetries. Despite being asymmetric, patterns can nevertheless provide an asymmetric balance in that several smaller graphic objects on one side can be "balanced" by a larger graphic object on the other side, or smaller objects can be placed further away from the center than larger objects. Alternatively, a darker object can be similarly balanced by several light objects. It should also be noted that, although the printed graphics 124 of Figs. 2 and 5 are shown here as having relatively simple shapes, this is for example purposes only. However, almost any shape or design can be employed, such as dots, ovals, triangles, squares, rectangles, flowers, butterflies, stars, hearts, pinwheels, spirals, double spirals, clotoid curves, Cornu spirals, polynomial double spirals, double spirals Euler, parametric double spirals, paisley, etc. In fact, it is generally preferable for graphic objects to be more complicated in nature and to have some degree of curvature and color to provide a more complex visual perception and assist in the overall masking effect of the article. For example, Figs. 7-9 generally illustrate more complex graphic objects that can be used in the present invention.
[88] Specific printed graphics 124 can also be selected so that, although asymmetrical, they are visually coordinated with the surrounding environment to provide a perception that the product will perform better. The surrounding environment can, for example, be the packaging (for example, packaging, bag, etc.) in which the absorbent article is initially supplied, as described in U.S. Patent Publication No. 2005/0154365 to Zander et al ., which is hereby incorporated in its entirety for reference for all purposes. Objects can also be visually coordinated with a garment, as described in U.S. Patent Publication No. 2008/0058748 to Seifert, et al., Which is also incorporated in its entirety for reference for all purposes. Coordinated visual graphic objects are those in which two or more visual characteristics match or are made to match.
[89] In certain cases, printed graphics 124 can be arranged to give an optical illusion when viewed from a particular focal point of the user. For example, the arrangement of graphic objects in relation to each other can form an optical illusion of perceptible movement as, at least, one of the objects that appears to move away from an edge of the body. Examples of objects that provide such an illusory pattern may include geometric, spiral, anomalous movement, rotation, color change, peripheral displacement, positive after image blurring, flicker network, stereopsis and chromo-stereopsis, contraction and expansion, contrast polarities, convection, chromatic assimilation, etc., as described in U.S. Patent Publication No. 2009/0157021 to Sullivan, et al., which is incorporated herein in its entirety for reference for all purposes. In another embodiment, graphic objects of different shades can be used. Regardless of the mechanism used, the optical illusion can make the user perceive the stain as being different in the product than it really is, thus increasing the masking of the stain.
[90] Printed graphics 124 can be printed on the absorbent article by any suitable method. For example, offline printing can be used to print graphics 124 on the first top sheet layer 106 before forming the opening 148 on the first top sheet layer 106. In addition, various colors of ink can be used to form the graphics 124 printed on the desired layer of the absorbent article, such as one or more colors.
[91] To print the printed graphics 124 on the first top sheet layer 106 or any other suitable layer of the absorbent article, provided that the printed graphics can be seen from the surface of contact with the body of the absorbent article, various types of printing processes can be used, such as stencil and screen printing, relief printing, planographic printing, intaglio printing and electronic printing. Examples of embossed printing may include typography and flexography. Examples of planographic printing may include offset lithography, screenless lithography, collotype and waterless printing. In addition, intaglio printing examples may include engraving, steel matrix and copper plate engraving. Examples of electronic printing may include electrostatic, magnetographic, ion or electron deposition and inkjet printing.
[92] In addition to the various types of printing processes mentioned above, it should be understood that various types of inks or ink systems can be applied to the absorbent article to create the printed graphics described 124, such as solvent-based inks, based on of water and cured with UV light.
[93] Furthermore, in addition to a first top sheet layer 106, which was discussed in detail above, the multilayer top sheet 138 also includes a second top sheet layer 108 which is located below and may be in direct contact with the first top sheet layer 106, although it is to be understood that, in some cases, another layer of the absorbent article may be placed between the first top sheet layer 106 and the second top sheet layer 108 in the z direction. As shown in the particular examples of Figs. 3 and 6, the second top sheet layer 108 may be a three-dimensional, liquid-permeable, perforated film. However, it is to be understood that the second topsheet layer 108 can include any of the other suitable topsheet materials discussed above, and the second topsheet layer 108 can also include a combination of any of those materials. In some embodiments, the second topsheet layer 108 is normally located below the first topsheet layer 106 and, above a sublayer of the topsheet 116 and any other layer that may be disposed between the baffle 130 and the second layer topsheet 108 in the z direction, such as one or more peak layers, transfer layers, distribution layers, absorption layers, absorbent core layers or additional layers of the topsheet.
[94] In addition to being formed from, for example, a non-woven material or a film, the second top sheet layer 108 can be cut to any suitable size and shape according to the need of the particular absorbent article in which it is being used. . In one embodiment, the second top sheet layer 108 can extend across the entire absorbent article in the longitudinal and transverse directions, such that it has the same general dimensions as the first top sheet layer 106. However, also it should be understood that the second top sheet layer 108 may not extend to the parts of the flap 136, and the second top sheet layer 108 may have a shorter overall length in the longitudinal (x) direction and a smaller overall width in the direction transverse (y) than the first top sheet layer 106, as shown in Figs. 3 and 6. For example, the total length of the second topsheet layer 108 can be from about 30% to about 100% of the total length of the first topsheet layer 106, such as from about 40% to 99% of the total length of the first topsheet layer 106, such as from about 50% to about 98% of the total length of the first topsheet layer 106. In addition, the total width of the second topsheet layer 108 can be about 10% to about 100% of the total width of the first top sheet layer 106, such as from about 25% to about 99% of the total width of the first top sheet layer 106, such as about 50% about 98% of the total width of the first top sheet layer 106.
[95] Furthermore, like the first topsheet layer 106, the second topsheet layer 108 of the absorbent article of the present invention can also have an opening to contribute to the funnel effect exhibited by the absorbent article after a fluid emission, although this is not necessary. Figs. 1-6, 21 and 23 show an absorbent article in which the second topsheet layer 108 does not have an opening such that the second topsheet layer 108 is exposed in the opening of the first topsheet layer 148, while the Figs. 12-13 show an absorbent article in which the second topsheet layer 108 has an opening 162. As shown in absorbent article 400 of Fig. 12, the opening of the second topsheet layer 162, as defined by perimeter 160a, can be smaller than the opening of the first topsheet layer, such that when the opening of the second topsheet layer 162 is located below the opening of the first topsheet layer 148, a part of the second topsheet layer remains exposed . However, in another embodiment, as shown in absorbent article 500 of Fig. 13, the opening of the second top sheet layer 162, as defined by the perimeter 160b, may be larger than the opening of the first top sheet layer 148, such that when the opening of the second topsheet layer 162 is located below the opening of the first topsheet layer 148, the second topsheet layer 108 is not exposed. In addition, the openings of the aforementioned second layer of topsheet may have complex shapes, with protrusions or simple shapes, without protrusions, as discussed in more detail above with reference to the opening of the first layer of topsheet 148. In general, the openings of the top sheet layer, if present in both the first and second top sheet layer, or in only one of the layers, the function of moving body fluids away from the user's skin and isolating the fluids at a desired location on one level lower part of the absorbent article in the z direction. The openings also allow the absorbent article to be folded and fit to the user's body to avoid the accumulation of fluids in the channels that can be created in the absence of such openings, due to compression forces exerted on the absorbent article. When both the first topsheet layer 106 and the second topsheet layer 108 include openings 148 and 162, a third topsheet layer 182 devoid of opening can be disposed between the second topsheet layer 108 and the deflector in the z direction of the absorbent article, as shown in Figs. 12-13. In this way, the user's body can be in contact with a top sheet layer material that provides softness and is comfortable against the user's skin.
[96] If the second top sheet layer 108 is continuous, as in Figs. 3, 6, 21, and 23, or has an opening 162 located under the opening of the first top sheet layer 148 which is smaller than the opening of the first top sheet layer 148, as shown in Fig. 12, in such a way that the perimeter 160a is substantially enveloped or shaped by the perimeter 114a when viewed from the surface of contact with the body 144 of the absorbent article in the z direction, the second top sheet layer 108 can be joined to the first top sheet layer 106 by a seal which is formed around the opening of the first top sheet layer 148 at or near perimeter 114a, 114b or 114c and generally corresponds to the shape of perimeter 114a, 114b or 114c. Therefore, the seal can generally be concentric with the perimeter 114a, 114b or 114c. The seal can also be a generally concentric seal around the perimeter 114a, 114b or 114c. In the embodiments of the absorbent articles 100, 400, 900 and 1000, as shown in Figs. 1-3, and 12, the seal generally corresponds to the complex shape of the perimeter 114a of the opening 148, which has multiple projections 184 and 186 in the longitudinal (x) and transverse (y) directions. The seal can also generally correspond to the shape of the embossed region 112, as discussed in more detail below. Meanwhile, in the embodiment of the absorbent article 200 shown in Figs. 4-6, the seal generally corresponds to the shape of perimeter 114b of opening 148, which is generally in the form of an oval or a rectangle with semicircular ends. In addition, in the embodiments of the absorbent articles 900 and 1000, as shown in Figs. 20-23, the seal generally corresponds to the complex shape of the perimeter 114c of the opening 148, which generally has two protuberances formed by projections 184 located in the longitudinal direction (x). Therefore, the seal is generally concentric with the perimeter 114a, 114b or 114c. On the other hand, if the opening of the second topsheet layer 162 is larger than the opening of the first topsheet layer 148 in such a way that the perimeter 114b is substantially surrounded by the perimeter 160b, as shown in absorbent article 500 of FIG. 13, then the seal generally corresponds to the shape of the perimeter 160b of the opening of the second top sheet layer 162. Therefore, the seal can generally be concentric with the perimeter 160b. The seal can also be a generally concentric seal around perimeter 160b.
[97] In addition, the seal is formed in such a way that the area in which the two layers are sealed has the appearance and feel of a simple, continuous layer of two separate layers that have been sealed together. This improves user comfort, since the transition from the first top sheet layer 106 to the second top sheet layer 108 is smooth. In addition, the transition area where the two layers are sealed is visually attractive, since the first top sheet layer 106 and the second top sheet layer 108 appear as if they were in the same plane, although the first top sheet layer 106 is arranged above the second top sheet layer 108. The seal can be formed by methods known to those skilled in the art, such as by means of an adhesive, pressure, heat, ultrasonic bond or combinations thereof.
[98] Additional features can be incorporated into the multilayer top sheet 138 of the absorbent article to improve the aesthetic aspect of the absorbent article and reduce the likelihood of leakage upon occurrence and fluid emission to improve the aesthetic aspect of the absorbent article. For example, the side strips that run along the absorbent article in the longitudinal direction (x) can be applied over the first top sheet layer 106 on the body contact surface 144 of the absorbent article. As the side strips are generally applied over the first top sheet layer, the side strips become part of the body contact surface 144 of the absorbent article. These strips can be formed of any suitable top sheet material and can further prevent fluid leakage at the peripheral edges of the absorbent article in the transverse direction (y).
[99] In addition, one or more embossed regions can be formed in one or more layers of the multilayer topsheet 138. In general, one or more embossed regions can be described as channels formed in the multilayer topsheet 138 due to deformation of the multilayer top sheet 138. The raised regions are formed in any suitable pattern not only to create an aesthetically pleasing surface, but also to facilitate the absorption of body fluids, where the fluid tends to flow along the edges of the channels, instead to accumulate at the contact points of the multilayer top sheet 138. Embossed regions can also help to channel body fluids to a desired location on the absorbent article. Embossed regions can also improve the consistency of the fit properties of the article, both before and after a fluid emission. To provide the absorbent article with such characteristics, the embossed channels can be positioned towards the periphery of the multilayer topsheet 138 either symmetrically or asymmetrically.
[100] In addition, embossed regions can be formed using any known conventional technique. Suitable techniques include, for example, the use of projecting elements to provide the desired embossing pattern to create compressed channels on the multilayer top sheet 138. For example, a suitable process may involve thermal bonding, in which a layer is passed through two rollers (for example, steel, rubber, etc.) where one roll is engraved with an embossing pattern and the other is flat. One or both rolls can be heated. In addition, thermal and ultrasonic bonding techniques can be used to create the embossed regions.
[101] As discussed above, at least one raised region may be present in the multilayer top sheet 138 of the absorbent article of the present disclosure. In the embodiments shown in Figs. 1-2, 4-5, 11, 20 and 22, this region is shown as the embossed region 112. In addition, the embossed region 112 is present on both the first top sheet layer 106 and the second top sheet layer 108 of the multilayer top sheet 138 no matter the shape of the opening 148 defined by the perimeter 114a, 114b or 114c. This configuration has an aesthetically pleasing appearance and provides a certain relief for the absorbent article, to direct the fluid to a desired location, preventing leaks and / or accumulation of fluid around the edge of the absorbent article.
[102] Generally, the embossed region 112 can mask the appearance, if any, of the seal between the two layers of topsheet 106 and 108, and also to provide support and structure to the multilayer topsheet 138 near the seal. The embossed region 112 can generally extend around the entire absorbent article in a complex and oblong shape that has numerous projections along the longitudinal (x) and / or transverse (y) direction of the absorbent article. In addition, regardless of the shape and size of the perimeter 114a, 114b or 114c of the opening 148, the raised region 112 extends around the multilayer topsheet 138 in an area that generally shapes the opening 148 in the first layer of the topsheet 106 .
[103] Furthermore, if the opening of the first top sheet layer 148 is defined by the perimeter 114a, 114b or 114c, the raised region 112 can be located on the multilayer top sheet 138 in such a way that at least a part of the seal between the first topsheet layer 106 and the second topsheet layer 108 discussed above can generally be coextensive with the raised region 112. For example, in Figs. 1-2, the embossed region 112 is generally coextensive with the complete seal between the first topsheet layer 106 and the second topsheet layer 108, as the seal has the same complete and oblong shape as the embossed region 112. Meanwhile, in Figs. 3-4, 20 and 22, the embossed region 112 is generally coextensive with the portion of the seal between the first topsheet layer 106 and the second topsheet layer 108 that extend in the longitudinal direction (x) of the absorbent article.
[104] In addition, one or more optional embossed regions 110, may be provided near the distal end 102 and / or proximal end 104 of the absorbent article, as shown in Figs. 1-2, 4-5 and 11. Embossed regions 110 can be semicircular in shape, although any other suitable shape can be used. The embossed regions 110 can be formed on both the first topsheet layer 106 and the second topsheet layer 108 or on just the second topsheet layer 108 depending on the design of opening 148 in the first topsheet layer 106. For example, in the embodiment of Figs. 1-2, the optional raised region 110 is only present on the second top sheet layer 108 because the opening 148 in the first top sheet layer 106 defined by the perimeter 114a extends beyond the area of the multilayer top sheet 138 in which the relief region 110 is present. For example, in the embodiment of Figs. 4-5, the optional raised region 110 can be present on both the first top sheet layer 106 and the second top sheet layer 108 as the opening 148 in the first top sheet layer 106 defined by the perimeter 114b is limited by the area of the top sheet multilayer 138 in which the raised region 110 is present. In addition, in another embodiment (not shown), the optional embossed region 110 can be located between the embossed region 112 and the distal end 102 and / or proximal end 104 of the absorbent article, such that the region in relief 110 can be formed on both the first topsheet layer 106 and the second topsheet layer 108, even when the opening 148 is defined by the larger perimeter 114a, instead of the smaller perimeter 114b.
[105] Although Figs. 1-2 and 4-5 show only the embossed region 112 and the optional embossed region 110 on the multilayer top sheet 138, any number of embossed regions can be used in the present invention to direct the fluid to a desired location. For example, in Fig. 11, the embossed region 170 is used to help direct the fluid away from the distal end 102 of the top sheet when an opening in the top sheet layer of the distal end 164 is used in an absorbent article for use nocturnal. Furthermore, in Figs. 20 and 22, the embossed region 180 is used in an area that extends over the first sublayer of the topsheet 116 to provide additional structural support to direct the fluid flow towards a central region of the absorbent article 900 or 1000. In addition, one or more, in some embodiments two or more, and in some embodiments, two to twenty spaced relief regions may be additionally used. Regardless of their shape, it is usually desirable for the embossed regions to be arranged in a generally symmetrical shape around a longitudinal centerline CL and / or transverse centerline CT of the multilayer top sheet 138, such as the embossed regions 174 shown in Fig. 11. In addition, although it is not necessary, the embossed regions can be arranged in sets (for example, pairs) to further improve the aesthetic appearance, as well as the embossed regions 110 and 180.
[106] In addition to the topsheet layers discussed above, the absorbent article of the present invention also includes a first topsheet sublayer 116. In Figs. 1-6 and 11-17 and 20-25, for example, a first top sheet sublayer 116 is positioned between the second top sheet layer 108 of the multilayer top sheet 138 and the deflector 130 in the z direction. In other embodiments, such as in the absorbent article 800, shown in Figs. 18-19, the first sublayer of the topsheet can be positioned within the multilayer topsheet 138, between the first topsheet layer 106 and the second topsheet layer 108 in the z direction. Regardless of its location, the first sublayer of the topsheet 116 can be made of a material that is able to quickly direct, transfer and absorb, in the z direction, the body fluid that is delivered to the topsheet at the opening of the first layer of topsheet 148. The first sublayer of the topsheet 116 can generally be of any desired shape and / or size. In Figs. 1-6, for example, the first sublayer of the top sheet 116 generally has a simple shape that resembles a racetrack or a rectangle with semicircular ends and has a length and / or width less than the length and / or width deflector overlays 130. However, it should be understood that the first sublayer of the top sheet 116 can have a simple rectangular, square, circular or triangular shape, or a more complex shape with several protrusions. For example, in absorbent article 900 as shown in Figs. 20-21, the first sublayer of the topsheet 116 has a shape that generally corresponds to the perimeter 114c of the first topsheet layer 106, as discussed above, in which a projection 184 is present on the first edge 132 and the second edge 134 in the direction transverse (y) along the width of the absorbent article 900, providing the first sublayer of the top sheet 116 with a domed shape in the transverse direction (y). This shape of the first sublayer of the top sheet 116 can help to fold the three-dimensional layer to fit the user's body, thus preventing leakage of the fluid.
[107] In addition, the first sublayer of the top sheet 116 can generally have dimensions of length, width and thickness that can form a well or cup-like structure that can be used to channel and hold the fluid in a desired location of the absorbent article away from the body contact surface 144 of the absorbent article. In addition, the dimensions of the first sublayer of the top sheet can be chosen so that the first sublayer of the top sheet is wide enough to capture the fluid and still remain comfortable against the user's body. Generally, the length of the first sublayer of the top sheet 116 in the longitudinal direction (x) can be from about 20 mm to 200 mm, such as from about 40 mm to about 175 mm, such as from about 60 mm to about 150 mm. Meanwhile, the width of the first sublayer of the top sheet 116 in the transverse direction (y) can be from about 10 mm to 100 mm, such as from about 15 mm to about 80 mm, such as from about 20 mm to about 60 mm. In addition, the first sublayer of the top sheet 116 can have a thickness ranging from 100 micrometers (μm) to about 8 mm, such as from about 500 μm to about 5 mm, such as from about 300 μm to about 3 mm. Regardless of their particular length, width, or thickness, the first sublayer of the top sheet 116 can generally be shaped by opening the first top sheet layer 148 and may be smaller in size than the opening of the first top sheet layer 148 to help creating a funnel-shaped configuration between the opening of the first topsheet layer 148 and the first topsheet sublayer 116, which directs body fluids downwards and towards a desired location in the absorbent article.
[108] In addition, any of the various layers of absorbent article can be used as the first sublayer of the top sheet 116. For example, the first sublayer of the top sheet 116 can be an additional top sheet layer, a peak layer, a layer fluid-absorbing layer or an absorbent core layer. Any material known in the art can be used in the first sublayer of the topsheet, such as the materials of the topsheet layer discussed in more detail above, and the absorbent core and peak layer materials, discussed in more detail below. In addition, the first sublayer of the topsheet 116 can be made of synthetic, cellulosic materials, or a combination of synthetic and cellulosic materials. For example, multifunctional air-deposited fabrics, such as airflow-formed cellulose fabric, may be suitable for use in the sublayer of the top sheet 116. The airflow-formed cellulose fabric may have a basis weight ranging from about from 10 gsm to about 300 gsm, and in some embodiments, between about 40 gsm to about 150 gsm. The fabric formed by airflow can be formed from short and / or long fibers of wood. The air flow tissue has a fine pore structure and provides excellent evaporation capacity, especially for menstruation.
[109] In addition, to further improve the ability of the absorbent article to transfer body fluid in the Z direction from its body contact surface 144 to the lower layers in the absorbent article, as well as to increase the capacity of the first sublayer of the top sheet 116 to fit the user's body based on its ability to fold, the first sublayer of the top sheet 116 has an opening 150. The opening 150 can be of any suitable shape, such as ovular, circular, rectangular, square, triangular, etc. The opening 150 in the first sublayer of the top sheet 116 can serve to further channel and direct the body fluid away from the contact surface with the body 144 of the absorbent article and towards the lower layers of the absorbent article in the Z direction, when used together with the opening 148 in the first top sheet layer 106, since the opening 150 is smaller than the opening 148 in the first top sheet layer 106 discussed above. Opening 150 may also form a cup-like structure to contain fluid and prevent it from leaking from the central region of the absorbent article and towards the edges. As such, the opening 150 of the first sublayer of the top sheet 116 has a perimeter 118 defined by the first sublayer of the top sheet 116 which is substantially surrounded by the opening of the first layer of the top sheet 148 and, if present, the opening of the second layer of sheet top 162 when viewed from the body contact surface 144 of the absorbent article. In some cases, the opening of the first sublayer of the top sheet 150 is entirely shaped by the opening of the first layer of the top sheet 148 in the z direction, when viewed from the surface of contact with the body 144 of the absorbent article. In addition, aperture 148 can be substantially surrounded by a raised region 112, as discussed above. This arrangement creates the aforementioned funnel effect to move body fluids away from the contact surface with the body 144 of the absorbent article in the Z direction, towards the first sublayer of the topsheet 116 or an absorbent layer of the absorbent article.
[110] In general, aperture 150 may have a length in the longitudinal direction (x) that is from about 15 mm to about 150 mm, such as from about 20 mm to 100 mm, such as from about 30 mm about 75 mm. The perimeter 118 of the sublayer of the topsheet 116 can also form an opening 150 which has a width in the transverse direction (y) which is about 10 mm to 80 mm, such as about 15 mm to 60 mm, such as about 20 mm to about 40 mm. The size of opening 150 allows the first sublayer of the top sheet 116 to fold sufficiently to fit the user's body, which can prevent the leakage of body fluids due to the channels that can be created in the absorbent article by introducing compressive forces . It is also desirable that the opening 150 is large enough for a consumer to see easily and place it directly under the vaginal opening so that it is located under the part of the surface of contact with the body of the absorbent article having primary contact with the body fluids . To further assist in the proper positioning of the absorbent article, the first sublayer of the top sheet 116 can be made of a colored material or can be dyed or printed in a color that is distinguished from the other layers of the absorbent article 100 or 200 and is visible through at least the first and second topsheet layers or any other layer disposed between the first topsheet sublayer 116 in the z direction, when viewed from the contact surface with the body 144 of the absorbent article. This can provide an aesthetically pleasing appearance to the absorbent article and can also assist the user in positioning the first sublayer of the top sheet 116 in the appropriate location, providing a visual indication of the correct positioning of the absorbent article.
[111] Furthermore, in the absorbent article of the present invention, it is to be understood that the first sublayer of the top sheet 116 can have a thickness in the bands discussed above, which is high enough to create a three-dimensional configuration with a protruding aspect in the absorbent article to further increase the tapering effect of the arrangement of the various layers and openings in the absorbent article, as shown in Figs. 14-17 and 28-29. In particular, a cross-sectional view of the width of the absorbent article 600 in the transverse direction (y) is shown before (Fig. 14) and after assembly (Fig. 15). In absorbent article 600, the first top sheet layer 106 has an opening 148, and the second top sheet layer 108 does not have such an opening, such that the second top sheet layer 108 remains exposed in the opening of the first sheet layer top 148. In addition, the first top sheet sublayer 116 has an opening of the first top sheet sublayer 150 which is smaller than the opening of the first top sheet layer 148, such that the opening of the first top sheet sublayer 150 is substantially surrounded by the opening of the first top sheet layer 148, seen from the contact surface with the body of the absorbent article in the z direction. The first sublayer of the top sheet 116 also has a width and length (not shown) that are generally the same or smaller than the width and length of the opening 148 first layer of the top sheet 108. Thus, the first sublayer of the top sheet 116 is substantially encased or shaped by the perimeter of the opening of the first top sheet layer 148 in the multilayer top sheet when viewing the absorbent from its body contact surface. This allows the first sublayer of the top sheet 116 to be comfortable for the user's body and also allows it to fit the user's body more easily. In addition, the thickness of the top sheet sublayer 116 results in the first top sheet sublayer 116 and the opening of the sublayer 150 forming a puddle-like elevated configuration in the center of the absorbent article 600 above the absorbent core 128, which can increase the ability of the absorbent article of the present disclosure to maintain fluids in a central location of the absorbent article to prevent leakage. The relief of the first sublayer of the top sheet 116 also allows the user to have a solid visual indication for the correct placement of the absorbent article.
[112] In yet another embodiment, as shown in Figs. 28 and 29, an absorbent article 1200 can be formed, where the first topsheet layer 106 has an opening 148, and the second topsheet layer 108 does not have such an opening, such that the second topsheet layer 108 remains exposed at the opening of the first topsheet layer 148. In addition, the first topsheet sublayer 116 may have an opening of the first topsheet sublayer 150 that has a larger perimeter (i.e., it has a longer length in the longitudinal direction (x ) and a wider width in the transverse direction (y) than the perimeter that defines the opening of the first top sheet layer 148, such that the entire opening of the first top sheet sublayer 150 is not contained within the perimeter of the opening of the first top sheet layer 148 when viewed from the contact surface with the body of the absorbent article in the z direction. In addition, the first top sheet sublayer 116 can be one width and one compress (not shown) that are generally larger than the width and length of the opening 148 first top sheet layer 108. Thus, the first top sheet sublayer 116 may extend beyond the perimeter of the opening of the first top sheet layer 148 on the multilayer top sheet when viewing the absorbent from its body contact surface. Opening the first smaller top sheet layer in the absorbent article 1200 may allow the sublayer of the top sheet 116 to receive the fluid at a more centralized location in the absorbent article, after which the fluid can be directed to a desired location in the absorbent article, such as the sublayer of the top sheet 116 or absorbent core 128.
[113] In another embodiment, as shown in Figs. 16-17, an absorbent article 700 may be formed such that it has multiple openings in the multilayer topsheet to further increase the ability of the absorbent article to move fluid away from the user's body and toward a centralized location or well in the article pad. For example, in Figs. 16 and 17, a cross-sectional view of the absorbent article 700 in the transverse direction (y) is shown before (Fig. 16) and after assembly (Fig. 17). In the absorbent article 700, the first topsheet layer 106 has an opening 148, the second topsheet layer 108 has an opening 162. The opening of the second topsheet layer 162 is smaller than the first topsheet layer 106, such that the perimeter of the opening of the second top sheet layer 162 is surrounded by the perimeter of the opening of the first top sheet layer 148, when viewed from the contact surface with the body of the absorbent article in the z direction. However, it should be understood that the opening of the second topsheet 162 may be larger than the opening of the first topsheet layer 148. Regardless of which of the openings of the topsheet layer is larger, a third topsheet layer 182 without an opening is arranged below the second top sheet layer 108 in the z direction and is positioned over a first top sheet sublayer 116. The top sheet sublayer opening 150 is generally the same size or smaller than the widest of the top openings top sheet layer. Furthermore, in Figs. 16 and 17, it should be understood that the width and length (not shown) of the first sublayer of the top sheet 116 generally allows the entire sublayer of the top sheet 116 to be substantially wrapped or shaped by the perimeter of the opening of the largest opening in the multilayer top sheet , when viewing the absorbent article from its surface of contact with the body. The combination of the thickness of the first sublayer of the upper sheet 116 and the length and width of the sublayer of the upper sheet 116 results in the first sublayer of the upper sheet 116 and the opening of the sublayer of the upper sheet 150 forming a puddle-like configuration in the center of the absorbent article 700, which can increase the ability of the absorbent article of the present disclosure to keep fluids in a central location of the absorbent article to prevent leakage. Again, as described above with reference to Figs. 14 and 15, the relief of the first sublayer of the top sheet 116 also allows the user to have a solid visual indication for the correct placement of the absorbent article.
[114] Although Figs. 14-17 show that the first top sheet sublayer 116 is positioned below both the first top sheet layer 106 and the second top sheet layer 108, it should be understood that in some embodiments, the first top sheet sublayer 116 it can be positioned between the first topsheet layer 106 and the second topsheet layer 108 such that it is placed between the different layers of the multilayer topsheet. This particular embodiment is shown in Figs. 18 and 19, where a cross-sectional view of the absorbent article 800 in the transverse direction (y) is shown before (Fig. 18) and after assembly (Fig. 19).
[115] Furthermore, it should also be understood that more than one topsheet sublayer may be present in the absorbent article, to provide structural support to the absorbent article, which allows the absorbent article to be folded and adjusted to the user's body, provides a tapering effect and keeps the fluid in a well at a desired location in the absorbent article. For example, in Figs. 22-27, in addition to having a first topsheet sublayer 116, absorbent articles 1000, 1100 and 1200 also include a second topsheet sublayer 174 which is at least partially visible from the body contact surface 144 of the absorbent article in the z direction. The shape of the second topsheet sublayer 174 may be a complex shape that corresponds with a perimeter 114c of the first topsheet layer 106, which has a projection 184 present on the first edge 132 and on the second edge 134 of the absorbent article in the transverse direction ( y), giving the second upper layer sublayer 174 a curved shape in the transverse direction (y). Meanwhile, the first sublayer of the top sheet 116 may have a simple shape that resembles a race track or a rectangle with semicircular ends. The shape of the second sublayer of the topsheet 174 can help fold the three-dimensional layer to fit the user's body, thus preventing leakage of the fluid. The protrusions or protrusions in the second topsheet sublayer 174 extend beyond the periphery of the first topsheet sublayer 116 in the transverse direction (y) when viewed from the contact surface with the body 144 of the absorbent article. Thus, when two topsheet sublayers are present, the perimeter 114c of the opening 150 in the first topsheet layer 106 generally corresponds to the shape of the larger topsheet sublayer, which in this case is the second topsheet sublayer 174, because protrusions visible in the transverse direction (y). In addition, as shown in the transverse views of the transverse (y) transverse direction of an absorbent article 1100 disassembled (Fig. 24) and assembled (fig. 25), the first sublayer of the top sheet 116 and the second sublayer of the top sheet 174 can be located below the second topsheet layer 108 in the z direction, such that the second topsheet sublayer 174 is below the first topsheet sublayer 116, with no additional layers of absorbent article separating the first topsheet 116 and the second topsheet sublayer 174. However, in other embodiments, the second topsheet layer 108 can be positioned between the first topsheet sublayer 116 and the second topsheet sublayer 174 in the z direction, as shown in Figs. 26 and 27, which is shown in cross-sectional view (y) of the absorbent article 1200 disassembled (Fig. 26) and assembled (Fig. 27).
[116] Like the first topsheet sublayer 116, which has an opening 150 defined by a perimeter 118, the second topsheet sublayer 174 can also have an opening. As shown in Figs. 23, 24, and 25, the openings 150 and 178 can, in general, be of the same size, such that the first sublayer of the top sheet 116 and the second sublayer of the top sheet 174 create a well with uniform dimensions in the absorbent articles 1000 and 1100 to retain the fluid in a desired location under a multilayer topsheet. However, in other embodiments, such as the embodiment of absorbent article 1200 shown in Figs. 26 and 27, the second topsheet sublayer 174 may have an opening 178 defined by perimeter 176 which is slightly smaller than the opening 150 of the first topsheet sublayer 116. Thus, the opening 178 of the second topsheet sublayer 174 is totally wrapped or shaped by the opening 150 of the first sublayer of the top sheet 116 in the z direction, when seen from the contact surface with the body of the absorbent article. This configuration can increase the tapering effect of the absorbent article to move fluids away from the body contact surface and toward a desired location in the absorbent article under the multilayer topsheet in the z direction to prevent fluid leakage.
[117] In addition, in some embodiments, as shown in Fig. 11, the absorbent article may include a top sheet sublayer of the distal end 168 which is separate, but is on the same plane as the first sublayer of the top sheet 116. The top sheet sublayer of the distal end 168 can include the materials discussed above for the first top sheet sublayer 116 and is located below the opening of the first top sheet layer 164, as defined by perimeter 166. The top layer sublayer upper sheet of the distal end 168 is used in a night absorbent article to prevent leakage at the distal end 102 of the absorbent article during use at night, which can stain clothing or sheets. The upper leaf sublayer of the distal end 168 can have any shape, such as a complex shape or a simple shape, such as the ovular shape shown in Fig. 11. Regardless of the shape, the upper leaf sublayer of the distal end 168 is smaller than opening the first upper sheet layer of the distal end 164 having a perimeter 166, so as to create a tapering effect to attract fluid in the z direction to an absorbent layer of the absorbent article to help prevent leakage at the distal end 102 .
[118] In addition, in the illustrated embodiments, in addition to the layers discussed above, the absorbent article also includes a liquid impermeable baffle 130. Deflector 130 is generally impervious to liquids and defines a contact surface with the garment 142 of the absorbent article. Deflector 130 can allow air or steam to pass out of the absorbent article, while preventing the passage of liquids. Any liquid impervious material can generally be used to form baffle 130. For example, a suitable material that can be used is a microporous film with a polymeric filler, such as a polypropylene or polyethylene based film. In specific embodiments, a polyethylene film is used and it has a thickness in the range of about 5 μm to about 150 μm, such as from about 10 μm to about 75 μm. A specific example of a deflector material is a polyethylene film such as that used in KOTEX® pant protectors, marketed by Pliant Corporation, Schaumburg, IL, USA.
[119] The absorbent article may also include an absorbent core 128, which is disposed between the baffle 130 and the multilayer topsheet 138, an optional first peak layer 120 that can be positioned between the multilayer topsheet 138 and the first sublayer of the top sheet 116, and an optional second peak layer 126 that can be positioned between the first sublayer of top sheet 116 and absorbent core 128. Each of these characteristics is discussed in more detail below.
[120] As indicated above, an absorbent core 128 can be disposed between the multilayer topsheet 138 and the deflector 130. The absorbent core 128 can provide additional capacity to absorb and retain body exudates beyond the first sublayer of the top sheet 116 that performs this function. In addition, the absorbent core 128 can be made of several different materials and contain any desired number of layers. For example, core 128 generally includes one or more layers (eg, two layers) of absorbent weft material from cellulosic fibers (eg, wood pulp fibers), other natural fibers, synthetic fibers, sheets woven or non-woven fabrics, cotton fabrics or other stabilizing structures, superabsorbent materials, fixing materials, surfactants, selected hydrophobic and hydrophilic materials, pigments, lotions, odor control agents or the like, and the combination of these materials. In a given configuration, the absorbent web includes a cellulosic lanugo matrix and can also include superabsorbent materials. The "fluff" cellulose may comprise a mixture of "fluff" cellulose. One of the preferred types of fluff is identified by the trade name NB 416, marketed by Weyerhaeuser Corp. It is a bleached pulp of highly absorbent wood, basically containing soft wood fibers.
[121] If desired, absorbent core 128 may include an optional amount of superabsorbent material. Examples of suitable superabsorbent materials include salts and copolymers of poly (acrylic acid) and poly (methacrylic acid), poly (acrylamides), poly (vinyl ethers), maleic anhydride copolymers with vinyl ethers and alphaolefins, poly (pyrrolidone vinyl) , poly (vinylmorpholinone), poly (vinyl alcohol). Other superabsorbent materials include unmodified and modified natural polymers, such as hydrolyzed starch grafted with acrylonitrile, starch grafted with acrylic acid, methyl cellulose, chitosan, carboxymethyl cellulose, hydroxypropyl cellulose, and natural gums, such as alginates, xanthan gum, locust bean gum , and so on. Mixtures of natural and fully or partially synthetic superabsorbent polymers can also be useful in the present invention. The superabsorbent material can be present in the absorbent core 128 in any desired amount.
[122] Regardless of the combination of absorbent materials used in absorbent core 128, absorbent materials can be formed into a weft structure, using various conventional methods and techniques. For example, the absorbent web can be formed using a dry forming technique, an air forming technique, a wet forming technique, a foam forming technique and the like, as well as combinations of these techniques. A co-formed non-woven material can also be employed. Methods and apparatus for carrying out such techniques are well known in the art.
[123] In addition to the multilayer topsheet 138, the first sublayer of the topsheet 116, the absorbent core 128 and the deflector 130, the absorbent article of the present disclosure may also contain other additional layers that are known in the art. For example, the absorbent article of the present disclosure can also contain one or more peak layers. Generally, peak layers 120 and 126, as shown in Figs. 3, 6, 12, and 13, can be made of any woven or non-woven material that is easily penetrated by the body exudates. The peak layer helps to absorb, slow down and diffuse peaks or jets of liquid that can be quickly introduced into absorbent article 100 or 200. Peak layers 120 and 126 can quickly receive and temporarily store the liquid before releasing it, for example. for example, in the absorbent core 128 or any other layer of the absorbent article. The first peak layer 120 can be located between the second top sheet layer 108 and the first top layer sublayer 116, while the second peak layer 126 can be located between the first top layer sublayer 116 and the deflector 130, such as between the first sublayer of the topsheet 116 and the absorbent core 128. Various interwoven fabrics and non-woven fabrics can be used to construct the peak layers 120 and 126. For example, the peak layers may comprise a layer of nonwoven fabric. fabric consisting of a meltblown or spunbond weave of polyolefin or polyester filaments. Such layers of non-woven fabric may include conjugated, biconstituent or homopolymeric staple fibers or other lengths and mixtures of such fibers with other types of fibers. The peak layers 120 and 126 can also be a carded and bonded weave or an air-laid weave composed of natural and / or synthetic fibers. The carded and bonded web may, for example, be a carded and powder bonded web, an infrared carded and bonded web or a carded and bonded web by airflow processing. The linked carded wefts can optionally include a mixture or composition of different fibers. The peak layers generally have a basis weight of less than about 100 gsm, and in some embodiments, between about 10 gsm to about 40 gsm.
[124] If desired, one or more peak layers can be dyed or printed with a pattern that is visible from the contact surface with the body 144 of the absorbent article to highlight the opening of the top sheet sublayer 150 to assist in proper positioning absorbent article. For example, as shown in Figs. 1-6 and 12-13, the second peak layer 126 can be printed with a pattern 122 with, for example, a wax jet ink. Any suitable pattern can be printed on the peak layer, although a circular dot pattern is shown in Figs. 1-6 and 12-13. The pattern 122 can correspond to an area shaped by the opening 150 in the first sublayer of the top sheet 116 and the opening 148 in the first layer of the top sheet 106 so that the pattern 122 is visible from the body contact surface 144 of the article. pad. Pattern 122 can improve the aesthetic aspect of the absorbent article and can also assist the user in positioning the absorbent article in the appropriate place on a garment, providing a visual indication. Although the pitting layers have been discussed in detail above, it should be understood that, instead of or in addition to the described peak layers, other layers can be used in the absorbent article, such as absorption layers, transfer layers or layers of distribution, and these layers and the peak layers can be colored, shaded or patterned to provide a visual indication to the user as to the correct placement of the absorbent article. In addition, when countless layers are used, each layer can have a different color, shade or pattern to further assist the user in placing the absorbent article in the correct location.
[125] It should be understood that, regardless of the layers present in the absorbent article, the various layers of the absorbent article can be held in relation to each other by gluing all or part of the surfaces adjacent to each other. A variety of bonding mechanisms known to those skilled in the art can be used to achieve this firm relationship. Examples of such mechanisms include, but are not limited to, applying adhesives or embossing in a variety of patterns between the two adjacent surfaces, entangling at least parts of a surface with parts of the adjacent surface, or casting at least parts of one surface to parts of the adjacent surface (eg, ultrasound fusion).
[126] For example, the multilayer topsheet 138 can be attached to the base deflector 130 using any desired pattern, such as continuous or discontinuous (e.g., toothed, stepped, stitched, etc.). In addition, depending on the size and geometry of the first topsheet layer 106 and the second topsheet layer 108 and the location of the bond, the first topsheet layer 106 or the second topsheet layer 108 may come into direct contact with the deflector 130. For example, if the peripheral edges of the second top sheet layer 108 extend to the peripheral edges of the first top sheet layer 108 and the multilayer top sheet 138 is connected to the deflector 130 on the periphery of the absorbent article, the second top sheet layer 108 will be in direct contact with the deflector 130. On the other hand, if all dimensions of the second top sheet layer 108 are smaller than the first top sheet layer 106, then the first top sheet layer 106 can come in direct contact with deflector 130. In addition, adhesives or other types of connections can be used to join absorbent core 128 and deflector 130, or lighter of the other optional layers present in the absorbent article.
[127] In addition to the various layers discussed above, the various embodiments of the absorbent article of the present disclosure can also include laterally extending flap parts 136 that can be integrally attached to the side regions along the middle part of the article. For example, the flap parts 136 may be members provided separately, attached later or attached to the middle part of the product. In other configurations, the parts of the tabs can be formed unitarily with one or more components of the product. As shown schematically in Fig. 1, for example, one or both wing parts 136 can be formed from a corresponding extension of the material used to form the first top sheet layer 106. Alternatively, one or both parts of wing 136 can be formed from a corresponding extension of the material used to form the deflector 130, or formed from the combination of the corresponding multilayer top sheet materials 138 and deflector 130.
[128] In addition, if desired, various structural elements can also be used to further increase the three-dimensional topography of the absorbent article. Fluid guides can also be used in the present invention to assist in preventing leaks, such as those described in U.S. Patent No. 5,614,295 to Quincy, III, et al., U.S. Patent No. 7,388,123 to Cowell et al., US Patent No. 5,912,194 to Everhart, et al. and U.S. Patent No. 4,892,534 to Datta, et al., Which are incorporated herein in their entirety for reference. Such fluid guides can be used at the center and / or periphery of the product as desired.
[129] In addition, although not shown, the surface of contact with the garment 142 of the baffle 130 of any of the absorbent articles described above may include an adhesive which has been applied to the surface of contact with the garment of the baffle. The adhesive can be used to attach the absorbent article to a garment, such as underwear. In addition, a peel-off sheet or peel-off strip can be applied over the adhesive to prevent contamination of the adhesive until the absorbent article is ready for use. The adhesive can be composed of any suitable adhesive. For example, the adhesive can be a pressure-sensitive adhesive such as EASYMELT 34-5602, available from the National Starch and Chemical Company. Examples of suitable peelable strips include silicone-coated Kraft paper, silicone-coated film, or the like. Other removable coatings include coatings containing polytetrafluoroethylene.
[130] As a result of the combination of characteristics used in the present invention, an absorbent article can be formed that is comfortable to use and provides a high degree of dryness, while having a reduced likelihood of leakage during use. This can be evident throughout the use of the article, including in an initial emission of a fluid and, later, when the article has already absorbed a certain amount of fluid.
[131] While the invention is described in detail with respect to specific embodiments thereof, it will be noted that those skilled in the art, by gaining an understanding of the above, can easily conceive of changes and variations of equivalents for these forms of achievement. Therefore, the scope of the present invention must be assessed as that of the appended claims and their equivalents.

权利要求:
Claims (15)
[0001]
1. An absorbent feminine hygiene article (100, 200, 300, 600, 700, 800, 1000, 1100, 1200) that generally extends in a plane defined by a longitudinal and a transverse direction, where the article is characterized by comprise: a liquid-permeable multilayer topsheet (138) having a length in the longitudinal direction (x), a width in the transversal direction (y), a longitudinal central line (CL) and a transversal central line (CT); wherein the multilayer topsheet (138) defines a contact surface (144) with the body of the absorbent article, the multilayer topsheet comprising at least a first layer (106) of topsheet disposed above a second layer (108) of top sheet, where the first top sheet layer defines a first opening (148) having a first perimeter (144), centrally arranged so that, when in use, it is positioned below the main fluid discharge point, where the the first top sheet layer and the second top sheet layer are joined by a seal, and yet the top sheet layer extends in the longitudinal direction (x) to define a distal end (102) and an opposite proximal end (104) ) of the absorbent article and in the transverse direction (y) to define a first edge (132) and a second opposite edge (134) of the absorbent article; a liquid impervious deflector (130), wherein the deflector defines a contact surface with the garment of the absorbent article; and a first sublayer (116) of the top sheet positioned between the second top sheet layer and the deflector, wherein the first sublayer of the top sheet defines a second opening (150) having a second perimeter (118), wherein the first perimeter (114) substantially surrounds the second perimeter, where the second opening has a length in the longitudinal direction between 15mm and 150mm and / or a width in the transverse direction from 10mm to 80mm.
[0002]
The absorbent article according to claim 1, characterized by the fact that the first opening has a substantially ovular shape; or where the first opening is substantially oblong in shape, while the first perimeter is defined by one or more projections in the longitudinal direction and one or more projections in the transverse direction.
[0003]
The absorbent article according to claim 1, characterized by the fact that the multilayer top sheet comprises a raised region (112), wherein the raised region substantially involves the first opening and or the raised region has a shape which generally corresponds to the perimeter of the first opening or at least a portion of the seal is generally coextensive with the raised region.
[0004]
4. The absorbent article (100, 200, 300, 600, 700, 800, 900, 1000, 1100, 1200) according to claim 1, characterized in that the first opening is substantially aligned with the longitudinal center line and wherein the first opening is substantially aligned with the transverse center line or where the first opening is located towards the distal end or proximal end of the first top sheet layer.
[0005]
5. The absorbent article (100, 200, 300, 600, 700, 800, 900, 1000, 1100, 1200) according to claim 1, characterized by the fact that the first opening has a length that is 15% to 80% of the length of the first top sheet layer or where the first opening has a width that is 20% to 80% of the width of the first top sheet layer.
[0006]
6. The absorbent article (100, 200, 300, 600, 700, 800, 900, 1000, 1100, 1200) according to claim 1, characterized in that the seal is generally continuous or is formed by an adhesive bond , a pressure bond, a thermal bond, an ultrasonic bond or a combination thereof.
[0007]
The absorbent article (100, 200, 300, 600, 700, 800, 900, 1000, 1100, 1200) according to claim 1, characterized by the fact that the first layer of top sheet is arranged above the second layer upper sheet at the distal end, proximal end, first edge and second edge of the absorbent article.
[0008]
8. The absorbent article (100, 200, 300, 600, 700, 800, 900, 1000, 1100, 1200) according to claim 1, characterized in that the length of the second top sheet layer varies by 30% at 100% the length of the first topsheet layer, or where the width of the second topsheet layer varies from 10% to 100% of the width of the first topsheet layer.
[0009]
9. The absorbent article (100, 200, 300, 600, 700, 800, 900, 1000, 1100, 1200) according to claim 1, characterized by the fact that a first liquid-permeable layer (120) is positioned between the second top sheet layer and the first top sheet sublayer, or where a second liquid-permeable layer (126) is positioned between the first top sheet sublayer and the deflector, where a pattern (122) is printed on the second liquid-permeable layer so that the pattern is visible from the surface of contact with the body of the absorbent article.
[0010]
The absorbent article (100, 200, 300, 600, 700, 800, 900, 1000, 1100, 1200) according to claim 1, characterized in that a part of the second top sheet layer is exposed below the first opening, and where the fence generally corresponds to the first perimeter.
[0011]
The absorbent article (100, 200, 300, 600, 700, 800, 900, 1000, 1100, 1200) according to claim 1, characterized in that the second top sheet layer defines a third opening having a the third perimeter and the absorbent article further comprises a third top sheet layer (182), wherein the third top sheet layer is disposed between the second top sheet layer and the first top sheet sublayer.
[0012]
The absorbent article (100, 200, 300, 600, 700, 800, 900, 1000, 1100, 1200) according to claim 11, characterized in that the first perimeter substantially involves the third perimeter and the sealing generally corresponds to the first perimeter, or where the third perimeter substantially surrounds the first perimeter and the fence generally corresponds to the third perimeter.
[0013]
13. The absorbent article (100, 200, 300, 600, 700, 800, 900, 1000, 1100, 1200) according to claim 1, characterized by the fact that an absorbent core (128) is disposed between the first sublayer the top sheet and the deflector.
[0014]
The absorbent article (100, 200, 300, 600, 700, 800, 900, 1000, 1100, 1200) according to claim 1, characterized in that it further comprises a second top layer sublayer (174) positioned between the first sublayer (116) of the top sheet and the deflector (130); the second top sheet sublayer defining a fourth opening having a fourth perimeter; the second top sheet sublayer has a shape that includes a first protrusion facing the first edge (132) in the transverse direction and a second protuberance facing the second edge (134) in the transverse direction, where the protrusions are visible from the surface of contact with the body of the absorbent article; or further comprising a third topsheet sublayer positioned at the distal end (102) of the absorbent article between the second topsheet layer (108) and the deflector (130); the first top sheet layer (106) defining a fifth opening having a fifth perimeter; wherein the third topsheet sublayer exists in the same plane as the first topsheet sublayer and is substantially ovular in shape.
[0015]
An absorbent article (100, 200, 300, 600, 700, 800, 900, 1000, 1100, 1200) according to claim 1, characterized in that it comprises in sequential order from a contact surface (144) with the body to a contact surface with the garment of the absorbent article: a liquid-permeable multilayer top sheet (138), at least one printed graphic (124) is present in the first visible top layer (106) the contact surface (144) with the body of the absorbent article along each distal end (102), proximal end (104), first edge (132) and second edge (134) of the absorbent article; a first liquid-permeable peak layer (126); a sublayer (116) of the top sheet; a second liquid-permeable peak layer (126), wherein a pattern (122) is printed on the second liquid-permeable peak layer, such that the pattern is visible from the body contact surface of the absorbent article ; an absorbent core (128); and a liquid-permeable baffle (130).

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同族专利:

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公开号 | 公开日

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EP2928433B1|2020-03-18|

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US20150313766A1|2015-11-05|

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RU2608806C2|2017-01-24|

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RU2015123826A|2017-01-10|

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KR20150093712A|2015-08-18|

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AU2012396080B2|2017-09-28|

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CN104780883A|2015-07-15|

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AU2012396080A1|2015-07-09|

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US10213347B2|2019-02-26|

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WO2014085974A1|2014-06-12|

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EP2928433A1|2015-10-14|

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CN104780883B|2019-04-02|

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EP2928433A4|2016-08-17|

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BR112015011504A2|2017-07-11|

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法律状态:
2017-07-25| B08F| Application fees: dismissal - article 86 of industrial property law|

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2017-09-19| B08G| Application fees: restoration|

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2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|

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2019-10-29| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|

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2020-10-27| B09A| Decision: intention to grant|

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2020-12-29| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 04/12/2012, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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PCT/CN2012/085812|WO2014085974A1|2012-12-04|2012-12-04|An absorbent article with a multi-layered topsheet|

---