专利摘要:
COORDINATED AND EMBEDDED PERFORATED TOP LEAF LAYER MATERIALS AND ABSORBENT ARTICLES CONTAINING SUCH MATERIALS. A topsheet layer material for use in an absorbent article includes a longitudinal direction, a transverse direction, and a depth direction. The topsheet layer material includes visually and spatially coordinated raised channels and apertures. Embossed channels have curvilinear setbacks configured along the longitudinal, transverse, or a combination of longitudinal and transverse directions. The openings are positioned along the topsheet layer laterally adjacent to the embossed channels such that at least a portion of the openings have a general shape configuration that is similar or identical to at least a portion of the embossed channel shape. . Such a coordinated aperture configuration may also be generally concentric or generally parallel to the raised channels.
公开号:BR112015021843B1
申请号:R112015021843-1
申请日:2014-03-05
公开日:2022-01-25
发明作者:Ramona Zenkich;Adrienne R. Loyd;Wendy M. Takken;Hue Scott Snowden;Heidi B. Hopkins;Katie A. Boland
申请人:Kimberly-Clark Worldwide, Inc;
IPC主号:
专利说明:

FIELD OF THE INVENTION
[001] The present invention relates to topsheet layer materials for absorbent toiletries. More particularly, it relates to embossed, perforated topsheet materials, and absorbent toiletries containing such materials. HISTORIC
[002] Absorbent toiletries such as feminine hygiene products, adult incontinence products, and baby and child hygiene products often incorporate at least two layers, and more commonly, at least three layers in their structures. For example, sanitary pads, panty liners, incontinence pads, diapers, mattress pads commonly include at least the top sheet layer (covering layer) in contact with the wearer's skin, a back sheet layer or baffle, to contact the user's clothing or bedding and prevent leakage, and an absorbent core layer sandwiched between the top sheet layer and back sheet layer to absorb and retain bodily excretions such as urine, feces and menstruation. It is also possible to include additional layers located internally in the structure of the toiletries, such as, for example, a peak layer, transfer delay layer or distribution layer positioned between the topsheet layer and the absorbent core layer. Alternatively, multiple layers located inwardly, such as the aforementioned layers and/or multiple core layers can also be used in an article structure.
[003] It is known that such a topsheet layer may have a single-layer or multi-layer construction (such as a laminate of two or more non-woven layers) and is normally embossed either as a single layer, or in combination with more layers located inside the article. Such reliefs (or embossed features) are often used either to direct or restrict the flow of body exudates along specific paths on the surface of the topsheet layer or to affect the flow of said exudate residues into the layer(s). (s) of article core. Therefore, a raised pattern not only creates an aesthetically pleasing surface, but channels can also facilitate absorption/movement of menstrual fluid. Menstrual flow will tend to flow along the densified edges of the raised channels rather than accumulating at contact points of the top sheet layer. These bumps are typically formed by compressing the top sheet layer using a pattern/pin and anvil roller assembly. Heat can also be applied to the pattern roll to melt the embossed layer materials. These reliefs are usually in the form of enlarged channels or discrete points. Examples of such embossing are available in US Patent Nos. 3,542,634 to J.J. Such et al., 5,370,764 to Alikhan, 5,727,458 to Schulz, 6,231,555 to Lynard et al., 7,067,711 to Kuroda et al., 7,323,072 to Engelhart et al., and in the United States Publications 2003/0187418 to Kudo et al., 2008/0294135 to Hara et al., 2010/0178456 to Kuroda et al. and 2010/0280471 for Shah. It is known that such embossing can slow the flow of waste off the surface of an article along the transverse direction/axis, providing increased surface area and barrier-like structure as well as specific liquid absorption paths. . For example, raised channels that direct residues to the longitudinal edges of a product for absorption in peripheral end regions of a core layer, and away from the initial centralized location of article fouling (article insult central region), are frequently described in the patent literature. However, there is a continuing need for a topsheet layer material that allows for waste absorption/fluid capture and barrier protection. There is a continuing need for a topsheet layer material that assists in capturing bodily waste before it flows out of an absorbent article, providing increased surface area with non-straight embossing. There is also a need for a topsheet layer material that provides signals to a user of the product about desired fluid capture/absorption characteristics through visually apparent topographical features.
[004] Topsheet layer materials are often also perforated, either via initial layering or through a mechanical process after layering, so as to create direct channels for bodily waste to travel from the soiling point of the article (insult region) to an internally positioned absorbent layer. For example, if a topsheet layer is a film, such film may be perforated shortly after extrusion of the film, through a vacuum and screen process to create a series of holes or openings through which waste may eventually leak. Flow. Alternatively, the film or non-woven topsheet layers may be punched through a mechanical roller device, such as a set of punch rollers, so as to create relatively large openings in a topsheet layer. Examples of such openings are described, for example, in US Patent No. 5,370,764 to Alikhan, which is incorporated herein by reference in its entirety. Even with the wide variety of known perforation methods, there is a continuing need for perforation configurations of the topsheet layer material, which can promote selective/localized and regional fluid absorption/capture for absorbent layers situated internally within articles of personal hygiene and/or that provide a visual indication to a user of the localized absorption/fluid capture regions of the article. There is still a need for a liquid receiving arrangement that provides an improved aesthetic appearance to a user-contacting topsheet surface.
[005] It is known to use combined patterns of bonding and perforation with the perforations being made entirely within patterns of bonding, such as, for example, those described in US Patent No. 5,370,764 to Alikhan. It is also known to surround a series of matrix style openings with a continuous embossed channel, as can be seen in US Patent No. 7,067,711 to Kuroda. Finally, they are also known to have wavy/curvilinear relief features (both under that of dots and channels) on the upper leaves. See, for example, US publication 2004176734 to Rasmussen et al. and International Publication WO 2007/116346 to Di Virgilio et al. However, these reliefs do not provide a visual indication coordinated with perforations to provide a user with multiple, visually distinct and localized fluid receiving/absorbing features to a top sheet layer. There is therefore a need for perforation and embossing combinations that provide visual indications of localized absorption/fluid capture capabilities to a user of the product. Such features would increase user confidence in such products. SUMMARY OF THE INVENTION
[006] A topsheet layer material with coordinated perforations and embossed channel includes a longitudinal direction, a transverse direction, and a depth direction. The topsheet layer material includes at least one raised channel with at least two side edges and a first series of perforations. At least one embossed channel has a general curvilinear shape configuration along each longitudinal direction, transverse direction, or combination of longitudinal and transverse directions. The first series of perforations are positioned in an unbroken sequence on the topsheet layer adjacent (such as laterally adjacent) to at least one raised channel of material or a portion of the channel. The first series of openings are configured with the same overall configuration so that at least a part of the general configuration is at least one raised channel. In an alternative application, such a first series of perforations is at least adjacent to a side edge of at least one raised channel. In an alternative application, a series of visually and spatially coordinated perforations are laterally adjacent to at least one lateral edge of at least one embossed channel. In an application, this visual coordination must mean that the overall shape of the perforation mimics the curvilinear shape of the raised channel, either partially or in its entirety. In one application, this spatial coordination means that the overall shape configuration of the perforation is immediately adjacent to the raised channel, such as within 2 cm, alternatively to 1 cm; alternatively, less than 5 mm from the raised channel, such as laterally adjacent.
[007] In one embodiment, the material of the top sheet layer includes numerous embossed channels, each with coordinated perforations. In one embodiment, the perforations and the raised channels are visually coordinated, i.e. they resemble each other in their overall configuration, or are at least partially the same in the overall configuration and are spatially aligned. In another alternative embodiment, a general-shaped embossed channel configuration may be formed from a single embossed channel, or from nearby embossed channels separated in a series or sequence such that together they form a general shape (like a swirl or circle). In another alternative application, the raised openings and channel(s) are visually and spatially coordinated (i.e., they appear close to each other, such as immediately adjacent to each other, rather than widely separated from each other at different locations on the surface). material). In yet another alternative embodiment, such visually and spatially coordinated openings and channel are not separated by any other raised channel. In yet another alternative embodiment of the topsheet layer material of the invention, the embossed channel general shape configuration is selected from a curvilinear shape such as a wave, swirl, circle, oval or other shape. rounded shape. In yet another alternative application, the raised channel general shape configuration is a complete shape, such as a circle. Such a complete circle may have disconnected ends, such as a series of raised channels that outline a complete circular shape, or alternatively, may be of a continuous channel configuration. In yet another alternative application, the embossed channel general shape configuration is an open shape, such as a whirlpool or partial circle (such as a semicircle). In yet another alternative application of the invention, the first series of perforations are only visually and spatially coordinated with only part of an embossed channel (or partial embossed channel) or vice versa. In yet another alternative application, "substantially" the entire curve length of an embossed channel is visually and spatially coordinated with a first series of perforations. In one embodiment, the term "substantially" means that at least 51% of the curve length of the raised channel is adjacent to visually and spatially coordinated perforations and spaces between the perforations (spaces of material between the first series of perforations), alternatively, at least 75% of the length of the embossed channel curve is adjacent to visually and spatially coordinated perforations and spaces between perforations (material spaces between the first series of perforations), in yet another alternative application, at least 90% of the length of the channel relief curve is adjacent to visually and spatially coordinated perforations and spaces between perforations (relevant spaces between the first series of perforations).
[008] In yet another alternative embodiment of the invention, the material of the topsheet layer includes a first series of perforations that are at least partially situated (at least an unbroken continuous array of six perforations) adjacent a side edge of at least one raised channel. In another alternative embodiment of the invention, the raised channel has one end, and the first series of openings extend around the end of the raised channel. In yet another alternative embodiment of the inventive topsheet material, the first series of perforations are present at two side edges (such as two opposite side edges) of an embossed channel.
[009] In yet another embodiment, the topsheet layer material includes an embossed channel whose shape has an open curvilinear configuration and includes at least one side edge. A first series of perforations lies completely along at least the lateral edge of the raised channel. In yet another alternative embodiment, the topsheet layer material includes an embossed channel that has several side edges. A series of perforations surround the embossed channel along the multiple side edges, alternatively completely around the side edge of the embossed channel or side edges.
[0010] In another alternative embodiment of the invention, the material of the topsheet layer includes a raised channel having a side edge and the material of the topsheet layer further includes a first series of perforations which are present in the size larger adjacent to the lateral edge of the raised channel. In yet another alternative embodiment of the invention, the topsheet layer material includes progressively larger perforations in the first series of perforations, with larger size perforations positioned closer to the side edge of the raised channel. In another alternative embodiment of the invention, the first series of perforations extends beyond a side edge of the raised channel. In yet another alternative embodiment, a first series of perforations, desirably at least six, are coordinated with only a portion of a lateral edge of the raised channel. In yet another alternative embodiment, the topsheet layer material includes a second set of perforations. In yet another alternative embodiment, the second set of apertures is an array of apertures. In yet another alternative embodiment, the first series of openings is circular in shape. In another alternative embodiment, the material of the top sheet layer includes embossed channels of different shapes. In yet another alternative embodiment, the material of the topsheet layer includes raised channels that are concentric with each other. In another alternative embodiment, the material of the topsheet layer includes embossed channels having different general shape configurations, each channel having a coordinated series of openings accompanying the channel. In yet another alternative embodiment, such raised channel shapes are swirls and circles. In yet another alternative embodiment, multiple series of coordinated openings span two side edges (such as two opposing side edges) of a single embossed channel.
[0011] In yet another alternative embodiment of the invention, the material of the topsheet layer includes a first series of openings that are positioned in an embossed channel shape and have a width that extends beyond the width of the channel shape. in relief. In yet another alternative, the material of the topsheet layer includes an embossed channel that is coordinated with a first series of openings substantially along a side edge of the embossed channel. In another alternative embodiment, such an embossed channel is completely surrounded by a first series of openings, at least along a side edge. In yet another alternative embodiment of a topsheet layer material of the invention, the raised channel and coordinate apertures are present in at least one region of the topsheet layer material.
[0012] In yet another alternative embodiment, the topsheet layer material of the invention is incorporated into a topsheet layer of an absorbent article, such as a sanitary napkin, panty liner, or incontinence article. In another alternative embodiment, such topsheet layer material is incorporated into only a portion of the multilayer topsheet layer (such as a bilayer or double layer topsheet) of an absorbent article. For example, in one embodiment, the topsheet layer material with coordinated raised channel openings is positioned along a longitudinal side edge of an article, like side cover layers, or along a central underlying section of a two-ply topsheet layer along the central longitudinal direction of the article.
[0013] In yet another alternative embodiment of the invention, an absorbent article includes a topsheet layer, a backsheet layer, and an absorbent core layer. The topsheet layer and backsheet layer interleave the absorbent core layer. The topsheet layer (and absorbent article) includes a longitudinal direction, a transverse direction and a depth direction. The top sheet layer is a planar sheet including raised channels and a first series of apertures. Embossed channels have a curvilinear shape configured along the longitudinal, transverse or a combination of longitudinal and transverse directions of the top sheet layer. The first series of apertures are positioned along the topsheet layer adjacent the raised channels such that at least a portion of the apertures have a general shape configuration that is similar to the adjacent channel. Such channels may have generally swirling, circular or wavy configurations, for example.
[0014] The topsheet material of the present invention provides specific fluid absorption/capturing regions to direct body exudates into an absorbent article, as well as a visual indication to the consumer of regions of fluid permeability. Objects and advantages of the invention are defined below in the following description, or may be learned by practicing the invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] A complete and informative disclosure of the present publication is described in more detail in the remainder of the specification, which includes references to the accompanying figures, in which:
[0016] FIGURE 1 is a partial top plan view of the opening patterns of a topsheet layer material in accordance with the invention.
[0017] FIGURE 1A is a partial top plan view of coordinate apertures (such as those in FIGURE 1) and embossed channel patterns (embossed features) of a topsheet layer material in accordance with the invention.
[0018] FIGURE 1B is a partial top plan view of an alternative embodiment of opening coordinates and embossed channel patterns of a topsheet layer material.
[0019] FIGURE 1C is a partial top plan view of another alternative embodiment of coordinated embossed and opening channel patterns of a topsheet layer material.
[0020] FIGURE 1D is a partial cross-sectional view along line 1D-1D of the top sheet material layer of FIGURE 1A illustrating a coordinate pattern of opening and embossing in the Z (depth) direction.
[0021] FIGURE 2 is a top plan view of an absorbent article in the form of a sanitary napkin in accordance with the invention, including a topsheet layer material having coordinated patterns of raised openings and channels.
[0022] FIGURE 2A is a stylistic cross-sectional view of the feminine sanitary napkin of FIGURE 2, taken along line 2A-2A of FIGURE 2.
[0023] FIGURE 3 is a top plan view of another alternative embodiment of a feminine sanitary napkin employing a coordinated opening and sunken channel pattern of a topsheet layer material in accordance with the invention.
[0024] FIGURE 3A is a stylistic cross-sectional view of the feminine sanitary napkin of FIGURE 3, taken along line 3A-3A of FIGURE 3.
[0025] FIGURE 4 is a top plan view of another alternative embodiment of a feminine sanitary napkin in accordance with the invention.
[0026] FIGURE 4A is a stylistic cross-sectional view of the feminine sanitary napkin of FIGURE 4, taken along line 4A-4A of FIGURE 4. DESCRIPTION OF THE INVENTION
[0027] Detailed references will be made to various embodiments 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 may 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. For the purposes of this application, like features will be represented by like numbers between the figures. While not expressly illustrated in each view or location, it is to be understood that traditional absorbent article construction adhesive must be used between each of the various layers of the article to secure the layers within the article.
[0028] It has been found, that through visual coordination of embossed aperture and channel patterns (embossed features) and the spatial alignment of such aperture and relief features within a top sheet layer material (or the combination of material of the top sheet layer and underlying layers) for toiletries, absorption of bodily waste and/or initial uptake of fluids (and bodily exudates) by such items can be concentrated in specific, localized regions of such items as desired . For example, such initial fluid capture can be visually highlighted to consumers, and achieved by creating drainage or flow structures from the coordinated relief channel and opening features. In addition, these visually coordinated and desirably spatially aligned embossed opening and channel patterns provide additional indications of fluid absorption/capture paths to the wearer of the product, which can instill higher levels of confidence in the correct placement of the product on the garment. intimate area of a user (since such features are readily visible from the surface of the top sheet), as well as overall product absorption.
[0029] With specific reference to Figure 1, the figure illustrates a partial top plan view of an embossed top sheet material 10 which is manufactured from a flat sheet material 11. Such a flat sheet material 11 may be of a single layer material, or alternatively, of multiple layers that have been laminated together to form a unified planar structure. Such topsheet layer material may be formed from a number of materials known in the topsheet layer art, such as, for example, one or more fibrous non-woven sheets, which may themselves be single layered or multilayered, one or more sheets of foam, such as cross-linked foams, open-cell or closed-cell foams, one or more sheets of fabric, a coated non-woven sheet, or a combination of any of the aforementioned materials. Such a combination can be made by adhesive, thermal or ultrasonic lamination into a unified flat sheet structure. The topsheet layer material acts to receive and absorb fluids, such as urine or menstruation, and therefore comprises a liquid permeable material. Additionally, the topsheet layer materials can also help to insulate the wearer's skin from fluids held in an underlying absorbent layer of an absorbent article. It is also well known that one or more chemical treatments can be applied to the topsheet layer materials in order to improve fluid circulation through the topsheet layer and into the article. Suitable topsheet layer materials include, but are not limited to, those described in US Patent Nos. 4,397,644 to Matthews et al.; 4,629,643 to Curro et al.; 5,188,625 to Van Iten et al.; 5,382,400 to Pike et al.; 5,533,991 to Kirby et al.; 6,410,823 to Daley et al. and United States Publication 2012/0289917 to Abuto et al., each of which is incorporated herein by reference in its entirety.
[0030] In a desirable embodiment, the topsheet may be made of any woven or non-woven material, which passes body fluids, but which still remains comfortable for the wearer. Suitable non-woven materials include, but are not limited to, spunlace hydroentangled materials, bonded carded fabrics (BCW) made from fibers and spunbond fabrics. The basis weight of non-woven wefts can generally range from about 5 grams per square meter (g/m2 - "grams per square meter") to 150 g/m2, in some applications from about 10 gsm to about 125 g /m2, and in some applications from about 25 g/m2 to about 120 g/m2.
[0031] As used herein, the term "spunbond weft" generally refers to a web containing continuous fibers of substantially small diameter. The fibers are formed by extrusion of a molten thermoplastic material from a plurality of fine, generally circular capillaries with the diameter of the extruded fibers being then rapidly shrunk as through, for example, tensile extrusion and/or other well-known mechanisms of continuous bonding after extrusion. The production of spunbond wefts is described and illustrated, for example, in US Patent Nos. 4,340,563 to Appel, et al., 3,692,618 to Dorschner, et al., 3,802,817 to Matsuki, et al. ., 3,338,992 for Kinney, 3,341,394 for Kinney, 3,502,763 for Hartman, 3,502,538 for Levi, 3,542,615 for Dobo, et al., and 5,382,400 for Pike, et al., which are here incorporated in their entirety for reference for all purposes. Continuous bonding fibers after extrusion are generally non-sticky when deposited on a collecting surface. Continuously bonded fibers after extrusion can sometimes have diameters less than about 40 microns and often between about 5 to about 20 microns.
[0032] Examples of suitable topsheet materials include rayon (synthetic silk), welded carded fabrics of polyester, polypropylene, polyethylene, nylon or other heat-bondable fibers, polyolefins, copolymers of polypropylene and polyethylene, linear low density polyethylene, and the aliphatic esters such as polylactic acid. Other materials suitable for the topsheet layer include airflow bonded carded wefts (TABCW) made from standard length fibers, such as a 25 grams per square meter (gsm) weft made from 1.5 denier (d ), polyethylene cladding, two-component polypropylene core, 35 to 40 millimeters (mm) standard length fibers available from FiberVisions Corporation, based in Duluth, Georgia, USA, which are available under the tradename ESC215.
[0033] The topsheet layer material can also be made of two or more different non-woven or film materials, with the different materials placed at separate locations laterally across the topsheet layer. For example, the top sheet layer can be a two-layer material (in two depth direction planes) or a multi-component material with a center section (as illustrated in Figures 3-4A) positioned along and spanning the direction longitudinal center of the product, with side cover sections that flank and are joined to each side (or side edge of the center section). The core can be made, for example, from the above-mentioned TABCW materials or it can be made from a perforated film. The side sections may be made of a different non-woven fibrous material, which is joined to the longitudinally directed center section. This two-layer configuration (also known as double coating) is described, for example, in U.S. Patent Nos. 5,961,505 to Coe, Patent No. 5,415,640 to Kirby and Patent No. 6,117,523 to Sugahara, each of which is incorporated herein by reference in their entirety. Such a two-ply topsheet material (or bicomponent topsheet) could offer a dry feel along the longitudinally directed center section, and a soft feel along the longitudinally directed side sections. It is also contemplated that such a two-ply topsheet material may include elastic components along its side edges to lift portions of the side materials during use, thus forming physical barriers or retention features on the product so as to fit it. more to a user's body.
[0034] Such topsheet layer material includes a pattern or first series of apertures 12 which are desirably placed in an overall shape configuration that is curvilinear. For purposes of this application, the term "gaps" shall not refer to random gaps/interstitial/interfibrous spaces normally formed between the fibers or filaments of a flat sheet of woven or non-woven fabric during initial deposit of the sheet onto a forming wire. or weaving. As illustrated in the figure, the first series of apertures are shown in general shape configurations that resemble whirlpools or partial whirlpools. The term "general shape configuration" means the shape created by an uninterrupted series/sequence of openings, or several relatively short raised channels), whose sequence (in the case of short openings or channels) creates a relatively larger coherent shape, when compared to the individual openings or to the channels themselves. The series/sequence of short raised openings or channels are desirably and visually recognizable as part of a larger coherent shape when viewed from a distance of at least one foot, more desirably when viewed from a distance of at least two feet , even more desirably, when viewed from a distance of at least three feet. The individual openings themselves, of a generally shaped configuration of openings, may have an initial shape, or different shapes, although in Figure 1 they are illustrated as completely circular. Such individual openings may be, for example, oval, circular, triangular, hexagonal, polygonal, rectangular, square or other geometric shapes or combinations of such shapes. Such relief channel opening shapes or short shapes, may be uniform or non-uniform in a series, and may be equally spaced from one another, or non-uniformly spaced from one another. For example, as can be seen from the series of openings of the general whirlpool configuration at the top of Figure 1, the spaces or gaps of material between adjacent circular openings may vary across the general whirlpool configuration. It is desirable that such individual adjacent openings are, in one embodiment, evenly spaced from one another and of a geometrical type. In a second embodiment, it is desirable that such individual adjacent openings are at least 1 centimeter (cm) apart. In another embodiment, such adjacent individual openings must be spaced at least 5 millimeters (mm) apart. In another alternative embodiment, such types of adjacent aperture geometry may be the same in a general shape configuration, but of different sizes, such as progressively larger or smaller, adjacent to a side edge of an embossed channel. Furthermore, such openings may be present in a shape configuration that is a generally "full" shape configuration, such as arranged in a full circular shape, or alternatively, in a generally "open" shape configuration, such as a partial circle. with spaced material gaps between openings, or the swirl shapes as illustrated. Similarly, an embossed channel general shape configuration can be formed from an extended embossed channel or from close but separate embossed channels in a series or sequence so as to form together a general shape configuration (such as the swirl seen in the left swirl characteristic of Figure 1A). As shown in Figure 1, such topsheet layer material may also optionally include at least one additional set of openings 13, e.g. placed along a matrix within the material to provide additional permeability of the layer material. top sheet. As shown, such an additional set of apertures may include one or more shapes, and may have a regular repeating pattern or an irregular pattern. If present in a topsheet layer material, this matrix (or set of visually uncoordinated apertures) should be visually distinguishable from the first series of apertures that lie in a generally curvilinear configuration. For example, this first series of apertures differs from the aperture matrix of Figure 1 in aperture shape, size, and/or spatial configuration.
[0035] Each opening contained in the material of the top sheet layer can be formed from the same opening forming process or by a different process, such as through previously noted mechanical drilling techniques (pin and roll anvil drilling) or through from other non-random hole forming processes, such as, for example, by needling, by water jet drilling, vacuum drilling or other known melt forming techniques. As noted, the apertures can vary in shape, size, depth, and overall distribution/positioning in the topsheet layer material. For example, some regions of the topsheet layer material may include the first series of coordinated relief openings and channels, while others may not. This first series of apertures in an overall curvilinear configuration may be placed only along the central longitudinal direction of the topsheet layer material. The diameters of individual openings can, in one embodiment, range from 0.1mm to 5mm, from 0.4mm to 1.5mm, or from 0.5 to 1.0mm. In a desirable embodiment, the individual openings and the first series of openings are both readily visible to a user (visible from a distance of 1 foot, for example). If there is a matrix-type aperture pattern, the aperture density can also vary from about 7.8 x103 holes/m2 to about 1.9 x106 holes/m2, from about 4.7 x104 holes/m2 to about 9 .3 x105 holes/m2 or from about 1.6 x 105 holes/m2 to about 3.1 x 105 holes/m2. The apertures may extend through the material of the topsheet layer alone, or through the material of the topsheet layer and also the innermost layers of the absorbent article.
[0036] As can be seen in Figure 1, the whirlpool-shaped voids (areas without openings) within the flat sheet of top sheet material 10 lie immediately laterally adjacent to the first series of openings 12 , to allow placement of visually coordinated embossed features (embossed channels) in the material of the invention, which are desirably and spatially aligned with the first series of apertures. Such visually coordinated relief features are desirably located at least laterally adjacent to the first series of openings, such as along the transverse direction (as seen in Figure 1A). In one embodiment, that first series of openings is positioned partially adjacent to the raised channels such that there is only partial lateral overlap of the openings in the series along the visually coordinated raised channel.
[0037] As can be seen in the partial top plan view of Figure 1A, a top sheet layer material of the present invention 20 (the sheet materials described with respect to Figure 1) includes a longitudinal direction "L", a transverse direction "T" and a depth direction "Z" (as seen in Figure 1D) in the flat sheet material 11. The embossed channel pattern and visually and spatially coordinated openings can extend essentially in the longitudinal direction, mainly in the transverse direction. or in a combination of both directions. The topsheet material of the present invention 20 includes a first set or series of apertures 12, previously exemplified in Figure 1, and also includes a laterally adjacent, coordinated relief channel feature or pattern 30, and of similar overall configuration. or equal to the general shape configuration of the first series of apertures 12, or alternatively, a part of the first series of apertures (at least six apertures). Alternatively, a first series of apertures 12 (at least six apertures) may have a configuration generally similar to or equal to a coordinated sunken channel or a portion of the sunken channel. Hence coordination of features or patterns of openings for raised channels desirably refers to visual and spatial coordination. Desirably, such sinking features 30 have one or more curvilinear sunken channel shapes, such as the curvilinear shapes being full or open shapes, shapes such as swirls, waves, oval shapes, circular other rounded shapes. Such raised channels are desirably situated immediately, and laterally adjacent to a first series of openings 12, so that they are only slightly lateral to the openings. In one embodiment, the first series of openings desirably lie completely outside the coordinated relief channels. In this way, two separate fluid capture/control features are positioned across a relatively large surface area of the material. The raised channels are desirably aligned with the openings. For example, in one embodiment, it is desirable that the closest distance between edges 44 between the embossed (or patterned) channel 30 and the first series of openings 12 is less than about 2 cm. That is, the distance 44 between each side edge of the opening in the first series of openings, and the point closest to the side edge of the coordinated relief channel is less than about 2 cm. In a second embodiment, it is desirable that the distance (the separation distance) is less than about 1 cm. In yet a second embodiment, it is desirable for the distance to be less than about 5 mm. In yet a second embodiment, it is desirable that the distance is between 1 and 5 mm. In yet another alternative embodiment, this distance must be less than about 2 mm. In yet another embodiment, that first series of openings is situated over the raised channels such that at least each of the openings in the first series 12 has an edge that extends outward from the lateral edge of the channel. (outside the raised channel) by a distance of less than 5 mm. Essentially, in such an embodiment, as illustrated in Figure 1C to be described, the diameter or widths of each opening is greater than the width of the channel in coordinated relief.
[0038] By having the dual functionality of liquid absorption/capture present in such proximity, it is theorized that these elements (depending on the opening and size of the relief, placement, shape and depth) can provide specific and visually recognizable regions of absorption/ fluid capture in a top sheet layer material. In one embodiment, it is desirable for each embossed feature (such as curvilinear or swirling shape) to include its own visually and spatially coordinated series of openings, and in some cases, as illustrated, multiple sets of visually and spatially coordinated openings. (upper whirlpool functionality in Figure 1A). In yet another embodiment, all openings within the topsheet layer material are visually and spatially coordinated with an adjacent embossing feature. It is desirable, in one embodiment, for such spatially coordinated series of apertures to be located laterally close to the raised channel, desirably immediately, laterally adjacent to the raised channel (without any other aperture functionality in between), as opposed to far apart. of the raised channel. Widely spaced means, in one embodiment, a separation distance greater than 3 cm between each opening in the sequence (set), to the nearest point in the embossed channel. Desirably, in an alternative embodiment, such a first series of coordinated openings and embossing channel do not have an opening, or a dissimilar (visually) second embossing channel or other embossing functionality therebetween.
[0039] Desirably, that first series of openings is a continuous, unbroken series or sequence of openings laterally adjacent to at least one lateral edge of an embossed channel. Desirably, in one embodiment, such a first series of openings are evenly spaced from the raised channel functionality along a side edge of the channel. By way of example, as can be seen in Figure 1A, the embossed whirlpool channel illustrated at the top 30 includes an outwardly facing first side edge 42 and an outwardly facing second side edge 43. As can be seen in whirlpool-shaped channel observed, an unbroken and continuous series or sequence of openings is present laterally and along each opposite lateral edge. For purposes of this application, the term "continuous" means a series or sequence of apertures positioned along a curvilinear path laterally adjacent to a lateral edge of the coordinated curvilinear embossing feature (such as a series of discrete points adjacent in embossing, short channels, or a continuous embossed channel), and without the series/sequence of openings being separated into two or more series of isolated openings along the side edge of the coordinated embossing functionality, either by part of the embossing channel (or functionality) that links between them, or by any other uncoordinated relief feature. Such an unbroken series is illustrated by the visually and spatially coordinated features of channel embossing in the form of swirl and aperture shown in each of the swirl features of Figure 1A, and with the largest series of unbroken apertures, in the superior coordinated swirl feature. , illustrated in Figure 1A. For example, an embossed channel can be visually and spatially coordinated with a first series of openings and a second series of openings, as can be seen in the top and bottom of Figure 1A of whirlpool features. For the purposes of this application, an embossed channel is an embossing feature, where the length of the embossing feature exceeds its width, desirably at least twice. In one embodiment, the embossing features are desired channels.
[0040] In yet another alternative embodiment, such a first series of coordinated openings may partially overlap with the embossed channel itself, but have a width dimension that extends beyond the width dimension of the embossed channel functionality. , such as the series of coordinate apertures 38 shown in Figure 1C. The raised channel 30 and the series of openings 38 are desirably coordinated even in the overlapping configuration of Figure 1C such that each is present in the material in a generally visually similar or identical configuration, and in the case of Figure 1C, an overlapping swirl configuration. The overall shape configuration of the aperture series mimics the shape of the embossed channel it accompanies. The first series of openings 38 in Figure 1C are partially laterally adjacent to the raised channel. In Figure 1A, the first series of openings 12 are fully laterally adjacent to the raised channels.
[0041] In an embodiment of the invention, the first series of openings is only visually and spatially coordinated with only a part of an embossed channel, or vice versa, such as having six or more openings of a first series visually and spatially coordinated with a part of a raised channel. In yet another alternative application, "substantially" the entire curve length of an embossed channel is visually and spatially coordinated with a first series of perforations. In one application, the term "substantially" means that at least 51% of the length of the raised channel curve is adjacent to visually and spatially coordinated openings and spaces between the openings (spaces of material between the first series of openings), alternatively , at least 75% of the length of the embossed channel curve is adjacent to visually and spatially coordinated openings and spaces between the openings (material spaces between the first series of openings), in yet another alternative application, at least 90% of the length of the curved embossed channel is adjacent to visually and spatially coordinated openings and spaces between the openings (relevant spaces between the first series of openings).
[0042] Generally, in a desirable embodiment, the first series of openings 12 may partially surround the channel or embossed feature 30, or alternatively, may straddle one or both of the outwardly facing side edges of the embossed channel pattern. , as illustrated in Figure 1A (swirl functionality shown at the top). It is also contemplated that certain openings 14 in the first series of openings 12 may partially surround a relative end 45 of the raised channel feature 30 such that it extends across the raised channel feature 30 to the other, if the embossed feature is an open functionality, like a whirlpool. Although not shown in Figure 1A, it is also contemplated for a first series of openings to completely encircle a coordinated relief feature, such as an embossed channel. This is shown at 46, 48 in Figure 1B, which illustrates a full circle of openings around a full circular relief channel. It is contemplated in one embodiment of the material of the invention for one or more embossed channel features to intersect in such a way that two or more curvilinear shapes 30 intersect 32 in a given region or regions in the embossing pattern. In yet another alternative embodiment, separate groupings of apertures may be present in a first series such that the separate unbroken groupings of apertures appear along the same side edge of an embossed feature or portions of an embossed feature. This is illustrated, for example, at the bottom of the whirlpool illustrated in Figure 1A, where one continuous grouping of openings is present towards the central location of the whirlpool, while the other is positioned at the location of the whirlpool opening. For the purposes of this application, each grouping of apertures in a series desirably includes at least three or more individual apertures. In another alternative embodiment, each grouping of openings in a coordinated series desirably has six or more openings. In yet another alternative embodiment, each grouping of openings in a coordinated series desirably has 10 or more openings. It should generally be recognized that the greater the number of coordinated openings in a cluster, the more similar is the overall shape configuration of the first series of openings to the accompanying/coordinated embossed functionality (or channel), and the more visually apparent the target fluid absorption/capture region is for a potential consumer. Although the topsheet layer material shown in Figure 1A includes a second set of openings in a regularly spaced array of different sized rectangles 13, such a second set is not necessary for the practice of a topsheet layer material 20 of the present invention. .
[0043] As can be seen from Figure 1A, it is desirable that the general aperture shape configuration of the first series of apertures closely contours to the shape of the embossed feature. In a desirable embodiment, such a general aperture configuration is approximately concentric with the shape of the raised channel, or parallel with the shape of the raised channel. In an alternative embodiment, a first series of coordinated apertures may be positioned adjacent a second series of coordinated apertures without being separated by an embossed feature, as can be seen with the relatively large circular apertures towards the middle of the whirlpool feature. top illustrated in Figure 1A. In yet another alternative embodiment, a first series of coordinate apertures may be positioned entirely adjacent to a single side edge of an embossed channel feature, as can be seen in the swirl positioned on the right side of Figure 1A. In yet another alternative embodiment, a first and a second series of coordinated openings may be positioned over opposing side edges of two intersecting relief features, as seen along the intersecting swirl features over the lower left of the Figure 1A. While it is desirable to coordinate a long, unbroken series of openings with an embossed channel feature, wherein the continuous, unbroken series of openings is positioned along the same side edge of the embossed channel feature, it is contemplated in a manner alternative embodiment, positioning a shorter, unbroken series of openings with a space separating the shorter, unbroken series ((and in which no other dispersed openings of similar size or embossed feature (loop or uncoordinated)) are present. It is desirable in one embodiment, at least two unbroken series of coordinated aperture groupings, containing at least six apertures, positioned along the same side of a curvilinear raised channel feature This is illustrated in the coordinated raised aperture and swirl feature of Figure 1A (where there is a gap between each grouping of coordinate openings of size that are located on the same side as the embossed channel functionality). As can be seen in the upper swirl feature of Figure 1A, in an alternative embodiment, a series of coordinate openings adjacent to one of the side edges of channel 43 are coordinated with only a portion of the embossed channel shape (curve length ), rather than all or substantially all channel shape (curve length).
[0044] A partial top plan view of an alternative embodiment of the topsheet layer material of the invention is illustrated in Figure 1B. Such alternative topsheet layer material 40 includes a number of different embossing features 30, 46, such as a swirl-shaped embossed channel 30 as part of a paisley-like channel embossing feature and full and circular channel embossing features in relief 46. Although two such concentric circular embossed channel features are illustrated in Figure 1B, more concentric embossed channel features are included within the scope of the contemplated inventive material. The material of the topsheet layer 40 of Figure 1B also includes a first series of co-ordinated apertures 34 with progressively smaller aperture sizes from the center of the swirl channel embossing functionality to outer portions of the swirl. This size progression provides additional visual cues to the consumer of the fluid absorbing/capturing functionalities of the topsheet layer material. As exemplified by this first series of openings, such openings are coordinated with the general curvilinear/whirlpool relief shape 30, but may also include openings of different sizes and separation distances between the openings, and the functionality of the raised channel itself. While including progressively smaller sizes, that first series of coordinated apertures are still clearly visually and spatially coordinated with the shape of the laterally adjacent channel feature 30, as opposed to being merely surrounded by the boundaries of the closed embossed shape of the channel. This coordination is in part occurring as a result of the openings' close proximity to the embossed shape of the channel, and the imitation of the overall shape. As noted, a channel embossing pattern in the form of two concentric circles 46 is also shown in Figure 1B. A second or third series of co-ordinated apertures, in the form of a complete concentric circular configuration (of individual circular apertures) is shown 48 completely enclosing the smallest of the concentric circular embossing channels. To give additional visual emphasis (visual indication) to the embossed channel features and coordinated openings, print features are also included in the illustrated embodiment 110 of Figure 1B. Such print features can be placed on either side of the topsheet layer material to improve visual indication of the target absorption region using known printing techniques, such as inkjet, gravure and gravure printing methods. flexography. In addition, a third set of openings in the form of an array of circles 35 are also present in the topsheet layer material 40 to provide additional openings for liquid or vapor permeability. Various sets of apertures are desirable for conventional liquid impervious sheet materials, such as polymeric film sheets, or certain smaller fiber diameter, hydrophobic nonwoven sheet materials, such as those containing meltblown fibers.
[0045] As noted, another embodiment of the topsheet layer material of the invention 50 is illustrated in the top plan view of Figure 1C. As can be seen in the Figure, the material of the top sheet layer includes swirl-like embossing features 30 on the flat sheet material 11, which have a width W1. A first series of relatively larger circular apertures 38 is coordinated with embossing features 30 in a swirl pattern, but instead of the first series of larger circular apertures 38 being completely offset from and entirely adjacent to the embossing features 30, it is positioned over the embossing features, such that a part of its width dimension W2 extends laterally beyond the width dimension W1 of the embossing features 30. In this embodiment, a dimension of the openings W2 is larger than the W1 dimension of the embossing functionality. Essentially, the diameter of the aperture holes is greater than the width of the raised channels, such that they are partially laterally adjacent to the raised channels. As with the previous embodiments, the general shape configuration of the openings is coordinated with the raised channel shapes to concentrate permeability/absorbency functionalities to specific areas along the surface of the topsheet layer material and also visually emphasize these areas (in the form of visual cues) to consumers. In this embodiment, only a portion of the apertures extend outside the area of the embossing features, whereas in previous illustrated embodiments, all of the coordinated apertures are positioned outside the area of the embossing features. Also to be noted, in the embodiment illustrated in Figure 1C (as well as Figure 2), no additional set of openings is shown, except for the coordinated openings, although such a set may be included if desired. For purposes of the topsheet layer material of the invention, wherein the flat sheet is a film or film laminate, it is desirable to include at least a first and a second series of apertures, at least one of which is a coordinate series. of openings (as shown in Figure 1A). In such a case, given the relatively low liquid permeability of most polymeric films, having multiple series of apertures, at least one of which would coordinate with an embossing functionality, would increase the overall liquid permeability of the film. However, if such a topsheet layer material of the invention is formed from a non-woven or woven material, the need to include numerous distinct series/sets of apertures (some of which are not coordinated with the embossing features relief) is reduced, taking into account the normal interstitial spaces between the fibers of a woven or non-woven material, which often results in higher levels of permeability than polymeric films.
[0046] In an enlarged partial cross-sectional view of the topsheet layer material of Figure 1A, as seen in Figure 1D taken along line 1D-1D, the flat topsheet layer material 11 includes distinct openings 12 positioned immediately, laterally adjacent to the embossing features 30 (channels), which are compressed areas of flat sheet material 11. The aperture and the embossing features illustrated in Figure 1D are immediately adjacent, as no other apertures or embossing functionality separates them. The visually and spatially coordinated opening and embossing features of the topsheet layer material of the invention can be placed in the topsheet layer material, either in individual process steps, such as through a set of separate embossing rollers and a mechanical pin punching roller assembly, or as part of a single process where a set of rollers produces the openings and embossing features in the same material that passes through such a set of embossing rollers. rolls. As noted with regard to apertures, the embossing functionality can be placed on the top sheet layer material itself, or alternatively, the top sheet layer material and at least one underlying layer (not shown) positioned between the top sheet layer and the back sheet layer.
[0047] Absorbent toiletries in the form of feminine sanitary towels that include the topsheet material of the invention are illustrated in Figures 2 to 4A in a flat, unfolded state. Unless otherwise noted, discussion of article dimensions and/or positions of individual components thereof is made with reference to the article in a flat, unbent state. Although feminine hygiene articles (sanitary pads) are illustrated, it should be understood that many types of absorbent articles, such as diapers, training diapers, incontinence articles such as underpants and pads, bedding and bandages, may utilize the material. of the top sheet layer of the invention. Such a topsheet layer material is particularly useful in an absorbent article having at least a topsheet layer, a backsheet layer and an absorbent core layer sandwiched between the topsheet layer and the backsheet layer. As used herein, the terms "comprising" or "including" are inclusive or open-ended and do not exclude additional unmentioned elements, components, or method steps. Accordingly, the terms "comprising" or "including" embrace the more restrictive terms "consisting essentially of" and "consisting of".
[0048] Referring to Figures 2 and 2A, there are shown a top plan view and stylistic cross-sectional view, respectively, of an absorbent article in the form of a sanitary napkin 60. The sanitary napkin includes a longitudinal direction L and a direction transverse T. Such a pad includes longitudinally directed side edges comprising two outwardly extending wings or flaps 68 originating from the main body of the pad, where such wings are used to secure the pad around a wearer's underwear for fixation of the absorbent in the underwear. A first longitudinal end 72 and a second longitudinal end 75 are included in the absorbent. A central longitudinal region 74 on the topsheet layer is located along the longitudinal direction of the absorbent. The absorbent is illustrated including a topsheet layer material of the present invention. With respect to the overall function and structure of the sanitary napkin 60, the wearer-contacting topsheet layer 62 is shown with a visually and spatially coordinated opening and an embossed channel pattern in the form of open, curvilinear swirls. As described above, the topsheet layer material includes embossing features 30 that are coordinated with a first series of apertures 12. Some of the apertures are illustrated as appearing on only a side edge of an embossing feature, while whereas other embossing features feature a series of openings co-ordinated from both opposite side edges 76. Such user-contacting, liquid-permeable top sheet material is bonded, at least at its periphery, to the sheet layer back in contact with the garment or outer covering layer 66, in a peripheral sealing region 70. Such peripheral sealing region may be formed by any known bonding technique, such as, for example, ultrasonic, adhesive or thermal bonding. . Such a bonding region generally compresses and seals the top sheet layer to the back sheet layer. The outwardly facing surface of the topsheet layer 62 will eventually come into contact with a wearer's body, while the outwardly facing surface of the backsheet layer 66 will eventually come into contact with a wearer's garment or bedding. user.
[0049] The backsheet layer 66 or outer cover functions to isolate absorbed fluids from the wearer's garment or bedding, and thus, desirably comprises a liquid impervious material. In one aspect, the backsheet layer 66 may optionally comprise a material that prevents the passage of liquids, but allows air and water vapor to pass therethrough. The backsheet layer may comprise a single layer or multiple layers, and these one or more layers may include similar or different materials. Suitable backsheet layer materials include, but are not limited to, polyolefin films, non-woven and non-woven laminates, and non-woven film/laminates. The particular structure and composition of the backsheet layer 66 can be selected from a variety of known films and/or fabrics with the particular material being selected as appropriate, to provide the desired level of liquid barrier, strength, abrasion resistance, tactile properties, aesthetics, etc. Suitable backsheet layer materials include, but are not limited to, those described in US Patent Nos. 4,578,069 to Whitehead et al.; 4,376,799 to Tusim et al.; 5,695,849 to Shawyer et al.; 6,075,179 to McCormack et al. and 6,376,095 to Cheung et al., each of which is incorporated herein by reference in its entirety. Although not shown in the figures, it is known in the art that such an absorbent may also include garment contacting adhesive portions and protective sheets of adhesive on the outwardly facing lower surface (not shown) of the backsheet 66, both in the regions of flap 68 and also along the central longitudinal direction of the absorbent.
[0050] Between the liquid pervious topsheet layer 62 and the liquid impervious backsheet layer (outer cover) 66 is positioned one or more internally located layers 64, 65. For example, as illustrated, the absorbent includes a layer absorbent core layer 64. Absorbent core layer 64 functions to absorb, and preferably "lock in" and retain bodily fluids passing into absorbent article 60 through topsheet layer 62. Absorbent core layer 64 may comprise a single layer or multiple layers, and these one or more layers may include similar or different materials. In order to efficiently and effectively utilize the absorbent capacity of the article, it is common for the absorbent structure to include one or more peak layers, liquid distribution layers or drain layers 65 in combination with a highly absorbent core layer 64 that absorbs and preferentially retains liquids. Suitable drainage layers include, but are not limited to, bonded-carded wefts, hydroentangled non-woven wefts, or spunbond wefts containing treated fibers or containing one or more topical agents that improve the contact angle with body fluid and/or modify the fluidity properties of body fluid. Highly absorbent core layers 64 generally include, but are not limited to, wefts or webs that contain cellulose fiber, superabsorbent particles (also known as SAP or SAM), synthetic cellulose fibers, synthetic fibers, and combinations thereof. The absorbent core layer may comprise any number of materials and structures, the particular selection of which will vary depending upon the desired load carrying capacity, flexibility, body fluid to be absorbed and other factors known to those skilled in the art. By way of example, suitable materials and/or structures for the absorbent core layer include, but are not limited to, those described in US Patent Nos. 4,610,678 to Weisman et al.; 6,060,636 to Yahiaoui et al.; 6,610,903 to Latimer et al.; 7,358,282 to Krueger et al. and United States Patent Publication 20100174260 to Di Luccio et al., each of which is incorporated herein by reference in its entirety.
[0051] The shape of the absorbent core layer 64 can be varied as desired and can comprise any of several shapes, including, but not limited to, generally triangular, rectangular, bone-shaped, and elliptical shapes. In one embodiment, the absorbent core layer 64 has a shape that generally corresponds to the overall shape of the sanitary napkin 60 so that the absorbent core layer 64 terminates near the peripheral seal region 70 and the wings 68. absorbent core layer may be substantially similar to sanitary napkin 60; however, it will be appreciated that the dimensions of the absorbent core layer 64, while similar, will often be somewhat smaller than those of the sanitary pad 60 in general, in order to be properly contained therein, and desirably sealed around the edges. .
[0052] As indicated above, the absorbent core layer 64 is positioned between the topsheet layer 62 and the backsheet layer 66. The individual layers constituting the article may be bonded together using means known in the art, such as adhesive, heat/pressure bonding, ultrasonic bonding and other suitable mechanical bonds. Commercially available construction adhesives usable in the present invention include, for example, Rextac adhesives available from Huntsman Polymers of Houston, Texas, as well as adhesives available from Bostik Findley, Inc., of Wauwatosa, Wisconsin. In one embodiment, the absorbent core layer 64 may be sealed between the topsheet layer 62 and the backsheet layer 66 along the perimeter of the absorbent core layer 64 along the sealing region 70 formed by applying heat and pressure to melt the thermoplastic polymers located in the topsheet layer 62 and/or the backsheet layer 66.
[0053] The wings 68 may be made of the materials described above, with respect to the top sheet layer and back sheet layer. In one embodiment, the wings may comprise an extension of a layer of material within the topsheet layer and/or the backsheet layer. By way of example, the wings 68 may be formed by an extension of the topsheet layer 62 and backsheet layer 66 which are joined along the seal region 70. Such wings may be formed integrally with the main part of the absorbent article. . Alternatively, the wings can be independently formed and separately attached to an intermediate section of the article. Wings made independent of other components of the absorbent article may be welded or adhesive bonded to a portion of the topsheet layer and/or backsheet layer. Furthermore, as is known in the art, when cutting materials into the desired shape, it is preferable to arrange the components so as to minimize waste. Examples of processes for making absorbent articles and wings include, but are not limited to, those described in US Patent Nos. 4,059,114 to Richards; 4,862,574 to Hassim et al., 5,342,647 to Heindel et al., 7,070,672 to Alcantara et al., international publication WO1997040804 to Emenaker et al., and US patent publication 20040040650 to Venturino et al. , each of which are incorporated herein by reference in their entirety.
[0054] As noted, in order to further assist with maintaining the sanitary pad 60 in the desired location on the undergarment, the garment adhesive (not shown) may be applied to the garment-facing side of the layer. backsheet 66 (not shown). The use of garment adhesive on the backsheet to aid in the secure placement of an absorbent article on the garment is well known in the art and there are numerous adhesive patterns and release strips suitable for use with the present invention. Examples of suitable garment adhesives, patterns and release sheets include, but are not limited to, those described in DE700225U1; US Patent Nos. 3,881,490 to Whitehead et al.; 3,913,580 Ginocchio; 4,337,772 to Roeder et al.; GB1349962; and United States patent publication 20070073255A1 to Thomas et al., each of which are incorporated herein by reference in their entirety.
[0055] In an alternative embodiment of a sanitary pad 80 in accordance with the invention, a top plan view of a sanitary pad with a multiple or double top sheet layer is illustrated in Figures 3 and 3A. In particular, a stylized cross-sectional view of the sanitary napkin of Figure 3 on line 3A-3A is illustrated in Figure 3A. As can be seen in the figures, the sanitary pad includes a topsheet layer having a side covering topsheet layers 82 positioned along the longitudinal side edges of the pad, and an underlying central topsheet layer 84 positioned between the layers of Side cover topsheet 82 and absorbent core layer 64. Although shown as extending the full width dimension of the absorbent core, such underlying central topsheet layer 84 need not run the full width, but instead may extend only slightly under the edges of the side covering topsheet layers 86. The side covering topsheet layers 82 may be joined to such underlying central topsheet layer by any known bonding method, such as, for example, through adhesive, thermal or ultrasonic bonding processes. Such a two-layer topsheet offers the benefit of having a desired first material along the longitudinal side edges of the absorbent and another desired material along the central longitudinal direction of the absorbent 74. For example, it may be desirable to have a topsheet material. non-woven, fibrous, soft, placed along the longitudinal side edges of the pad to help reduce abrasion to the wearer's inner thighs during wear and to provide additional comfort. In contrast, an apertured film may be desirable as an underlying central topsheet layer 84 to assist in reducing staining and rewetting concerns in the center of the absorbent, where the absorbent would be more likely to soil.
[0056] In yet another alternative embodiment of a sanitary pad 90 according to the invention, a top plan view and stylistic cross-sectional view are illustrated in Figures 4 and 4A. As can be seen in these figures, a top sheet with two layers is also illustrated. However, in this case, the topsheet layer material of the invention is used as the side covering topsheet layers 92. A different topsheet material, such as a film or non-woven sheet material, is used for laying along the central longitudinal direction 74 of the absorbent, as a center topsheet layer 94 underlying the sidecover topsheet layers 92. As illustrated, a line of adhesive 88 secures the sidecover topsheet layers 92 to the backsheet layer. Underlying central topsheet 94 below side edges 86. Underlying central topsheet layer 94 is shown not to span the entire width of a transfer layer 65 or an absorbent core layer 64 positioned below it.
[0057] The sanitary absorbent/absorbent articles of the present invention may further include one or more components or elements as desired. By way of example, the absorbent article may optionally include slits, voids or uncoordinated embossments in the topsheet layer, inner layers and/or absorbent core layer, in order to improve fluid absorption, liquid distribution, stiffness (flexural strength) and/or aesthetic appeal. Examples of suitable additional embossing patterns and embossing methods include, but are not limited to, those described in US Patent Nos. 4,781,710 to Megison et al.; 7,686,790 to Rasmussen et al., EP0769284A1 to Mizutani et al.; and United States publication 20050182374 to Zander et al., each of which are incorporated herein by reference in their entirety.
[0058] The absorbent articles of personal hygiene may optionally contain one or more additional elements or components as are known and used in the art, including, but not limited to the use of fold lines, individual wrappers, elastic flaps that extend above the plane of the backsheet layer in use, additional independent wings, such as over the edges, odor control agents, perfumes, and the use ink printing on one or more surfaces of the topsheet layer, backsheet layer, wings , internally located layers and/or absorbent core layer. In addition, other additional features and various constructs are known in the art.
[0059] By including the topsheet material as the topsheet layer in absorbent articles, specific fluid absorbing/capturing regions can be created as the opening and embossing fluid control functionalities are in close proximity to each other, acting as a drainage feature. Furthermore, by visually and spatially coordinating at least a first series of openings that have a generally curvilinear configuration with a raised feature (such as a channel or series of channels) having a similar or identical generally curvilinear configuration, a Visual indication of fluid absorption/capture areas may be provided to consumers of such absorbent products. Such visually distinctive regions can be placed in certain consumer product areas to allow for proper placement of such items in underwear or under likely soiled locations.
[0060] Thus, although the invention has been described in detail with respect to specific representations, it will be apparent to those skilled in the art that various alterations, modifications and other alterations may be made to the invention without departing from the spirit and scope thereof. Therefore, the claims are intended to encompass all such modifications, alterations and other changes.
权利要求:
Claims (12)
[0001]
1. Topsheet layer material (20) with coordinated openings (12) and embossed channel (30), said topsheet layer material (20) including a longitudinal direction, a transverse direction and a depth direction, said topsheet layer material (20) including at least one embossed channel (30) having at least two side edges (42, 43), and a first series of openings (12), wherein said at least one embossed channel (30) has a generally curvilinear configuration along said longitudinal direction, the transverse direction or a combination of longitudinal and transverse directions, and wherein said first series of openings (12) are positioned in an unbroken sequence on said material. of top sheet layer (20) laterally adjacent to said at least one raised channel (30), characterized in that said first series of openings (12) are configured in the same or generally similar configuration. and, as at least a portion of said at least one raised channel generally shaped configuration (30), and wherein said first series of openings (12) are at least adjacent to a lateral edge (42, 43) of the at least at least one relief channel (30), and further wherein said relief channel (30) includes multiple side edges (42, 43) and the first series of openings (12) surround said relief channel (30) along each of said multiple side edges (42, 43).
[0002]
2. Top sheet layer material according to claim 1, characterized in that the shape of the embossed channel (30) is a generally open curvilinear shape configuration (13) and that it includes at least one side edge (42) , 43) with said first series of openings being situated substantially along at least said side edge of said raised channel.
[0003]
A topsheet layer material according to claim 1, characterized in that said raised channel (30) includes a side edge (42, 43) and said first series of openings (13) are present in increasing size. , adjacent said side edge of the embossed channel, wherein openings of larger size are positioned closer to said side edge of the embossed channel.
[0004]
A topsheet layer material as claimed in claim 1, characterized in that said first series of openings (13) extend beyond a side edge (42, 43) of said embossed channel (30).
[0005]
5. Top sheet layer material according to claim 1, characterized in that it further includes a second set of openings.
[0006]
6. Topsheet layer material according to claim 1, characterized in that it includes a plurality of embossed channels (30), each having at least one side edge (42, 43) and a general shape configuration, with each raised channel having a series of openings coordinated along at least one side edge of its general shape configuration, wherein the raised channel's general shape configurations are swirls.
[0007]
7. Top sheet layer material according to claim 1, characterized in that openings (13) span the two side edges (42, 43) of a general shape configuration of the embossed channel (30).
[0008]
8. Topsheet layer material according to claim 1, characterized in that the general shape configuration of the raised channel (30) has one end and said first series of openings (13) surround said end of said configuration generally raised channel shape; or wherein said embossed channel defines a width and the openings are positioned over an embossed channel generally shaped configuration, and extend beyond the width of said embossed channel generally shaped configuration.
[0009]
9. Top sheet layer material according to claim 1, characterized in that the openings (13) are positioned completely around said general shape configuration of the raised channel (30).
[0010]
The topsheet layer material as claimed in claim 1, characterized in that the raised channel general shape configuration and the aperture general shape configuration are coordinated in at least one region of said topsheet layer material.
[0011]
11. An absorbent article comprising the topsheet layer material (20) with coordinated openings (12) and raised channel (30), said topsheet layer material (20) including a longitudinal direction, a transverse direction and a direction in depth, said topsheet layer material (20) including at least one raised channel (30) having at least two side edges (42, 43), and a first series of openings (12), wherein said at least an embossed channel (30) has a generally curvilinear configuration along said longitudinal direction, the transverse direction or a combination of longitudinal and transverse directions, and wherein said first series of openings (12) are positioned in an unbroken sequence on said topsheet layer material (20) laterally adjacent to said at least one raised channel (30), characterized in that said first series of openings (12) are configured in the same or similar configuration. similar generally shaped configuration, such as at least a portion of said at least one raised channel generally shaped configuration (30), and wherein said first series of openings (12) are at least adjacent to a side edge (42, 43) of the at least one relief channel (30), and further wherein said relief channel (30) includes multiple side edges (42, 43) and the first series of openings (12) surround said relief channel (30) along each of said multiple side edges (42, 43).
[0012]
12. An absorbent article according to claim 11, characterized in that said article includes a longitudinal direction and has longitudinal side edges, and a transverse direction, and said embossed channel (30) is positioned along said edges. longitudinal sides (42, 43) of the article, or wherein said article includes a central longitudinal section, and said embossed channel is positioned along said central longitudinal section of the article.
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同族专利:
公开号 | 公开日
AU2014242609B2|2016-06-09|
EP2978397B1|2018-06-06|
KR101727423B1|2017-04-14|
AU2014242609A1|2015-11-05|
US20140296815A1|2014-10-02|
EP2978397A4|2016-11-16|
MX2015012208A|2015-12-01|
BR112015021843A2|2017-07-18|
US9173782B2|2015-11-03|
EP2978397A1|2016-02-03|
MX353459B|2018-01-12|
WO2014155216A1|2014-10-02|
KR20150136087A|2015-12-04|
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法律状态:
2018-11-13| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
2020-01-07| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
2021-08-24| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
2021-11-30| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
2022-01-25| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 05/03/2014, OBSERVADAS AS CONDICOES LEGAIS. |
优先权:
申请号 | 申请日 | 专利标题
US13/852,450|2013-03-28|
US13/852,450|US9173782B2|2013-03-28|2013-03-28|Coordinated apertured and embossed topsheet layer materials, and absorbent articles containing such|
PCT/IB2014/059475|WO2014155216A1|2013-03-28|2014-03-05|Coordinated apertured and embossed topsheet layer materials, and absorbent articles containing such|
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