• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    absorbent article including a plurality of longitudinally extending channels. the present invention relates to an absorbent article which includes a first end region, a second end region and a central region, a plurality of channels arranged in each of the first and second end regions, at least one of the first and the second end, at least one channel arranged in the central region and extending in a longitudinal direction of the article, the at least one channel being connected at each end thereof to the plurality of channels in the first end region and the plurality of flutes in the second end region.
    公开号:BR102012019914B1
    申请号:R102012019914-9
    申请日:2012-08-08
    公开日:2021-04-13
    发明作者:Ana Maria Elena R. Marcelo；Fernanda Wiermann Paques；Steven H. White
    申请人:Johnson & Johnson Do Brasil Indústria E Comércio De Produtos Para Saúde Ltda.；
    IPC主号:
    专利说明:

    RELATED REFERENCE TO RELATED ORDER
    [001] This application is a part-continuation of U.S. Patent Application Serial No. 12 / 431,793 filed on April 29, 2009, a priority of which is hereby claimed. FIELD OF THE INVENTION
    [002] The present invention relates, in general, to sanitary napkins and, in particular, to a sanitary napkin that includes a plurality of channels that extend longitudinally to promote fluid absorption by improved capillary effect in a longitudinal direction of the pad. BACKGROUND OF THE INVENTION
    [003] For a hygienic absorbent to efficiently absorb a large amount of fluid during use, it must absorb fluids by capillary effect effectively through the entire absorbent structure of the absorbent. In the absence of effective capillary absorption properties, menstrual fluid tends to accumulate in certain regions of the absorbent as a result of which the total absorbent capacity of the absorbent is not used effectively. In addition to having superior capillary absorption capabilities, sanitary pads should also be able to absorb fluids quickly. That is, sanitary napkins must also have superior fluid penetration characteristics. Consequently, the inventors of the present invention have recognized a need to provide a sanitary pad that absorbs fluids by capillary effect efficiently in the longitudinal direction of the pad while at the same time providing superior fluid penetration characteristics. By providing an absorbent that efficiently absorbs fluids in the longitudinal direction, while at the same time absorbing fluids quickly, the inventors have provided a hygienic absorbent that exhibits superior fluid handling characteristics and effectively utilizes the total absorbent capacity of the absorbent. SUMMARY OF THE INVENTION
    [004] In view of the above, the present invention features an absorbent article that includes a longitudinally extending centerline, a transversely extending centerline, a first end region and a second end region, a central region disposed between the first and second end regions, a first longitudinal edge, a second longitudinal edge, a first transverse edge, a second transverse edge, a main absorbent body, a first embossing pattern which has a first portion disposed in the first region of end and a second portion disposed in the second end region, the first and second portions, each including a plurality of interconnected channels, the interconnected channels defining a plurality of protuberances facing the body, and a second embossing pattern including at least one channel arranged in the central region and extending in a longitudinal direction of the article, and at least one channel that crosses at least one of the plurality of interconnected channels in the first end region and at least one of the plurality of interconnected channels in the second end region. BRIEF DESCRIPTION OF THE DRAWINGS
    [005] Examples of embodiments of the present invention will now be described with reference to the drawings, in which:
    [006] Figure 1 is a perspective view of an absorbent article according to a first embodiment of the present invention; Figure 2 is an exploded view of the absorbent article shown in Figure 1 representing the layers of material that constitute it before embossing; figure 3 is a sectional view taken along line 33 in figure 1; figure 4 is a top plan view of an absorbent article according to a second embodiment of the present invention; figure 5 is a view detailed perspective view of a portion of the absorbent article shown in figure 4; figure 6 is a sectional view taken along line 66 in figure 5; figure 7 is a top plan view of an absorbent article according to a third embodiment of the present invention; figure 8 is a detailed perspective view of a portion of the absorbent article shown in figure 7; figure 9 is a sectional view taken along line 99 in figure 8; figure 10 is a sectional view perspective from one to Absorbent article according to a fourth embodiment of the present invention; Figure 11 is an exploded view of the absorbent article shown in Figure 10, representing the layers of material constituting it prior to embossing; Figure 12 is a perspective view of an article. absorbent according to a fifth embodiment of the present invention; figure 13 is a sectional view of the absorbent article shown in figure 12, taken along lines 13-13 thereof; figure 14 is a cross-sectional view of the absorbent article shown in figure 12 taken along lines 14-14 thereof; and figure 15 is an exploded view of the absorbent shown in figure 12, representing the layers of material that constitute it before embossing. DETAILED DESCRIPTION OF THE INVENTION
    [007] The present invention relates, in general, to disposable absorbent articles such as sanitary napkins, panties protectors, incontinence absorbent products, and other disposable absorbent articles used close to the user's body. Although the invention will be described here with reference to a sanitary napkin, it can be used with other disposable absorbent articles.
    [008] Absorbent articles according to the present invention provide superior fluid handling characteristics, and more specifically provide superior longitudinal capillary absorption characteristics. In addition, absorbent articles according to the present invention provide superior fluid penetration characteristics.
    [009] A specific embodiment of a sanitary napkin 10 according to the present invention is illustrated in figure 1. The sanitary napkin 10 includes a main absorbent body 11, a longitudinally extending center line 12, a transversely extending center line 14 , a first longitudinal edge 16, a second longitudinal edge 18, a first transverse edge 20, a second transverse edge 22, a first end region 24, a second end region 25, and a central region 28 located between the first and second end regions 24 and 25. The term "main absorbent body" for use in the present invention means the area defined by the main absorbent portions of the absorbent, excluding the areas defined solely by the cover and / or barrier, and excluding the areas defined by the flaps of the absorbent. product.
    [010] The absorbent 10 further includes a first embossing pattern 26. The first embossing pattern 26 has a first portion 27 disposed in the first end region 24 and a second portion 29 located in the second end region 25, causing the first and second portions 27 and 29 to be spaced in relation to each other in the longitudinal direction of the absorber 10. Each of the first portion 27 and second portion 29 comprises a plurality of interconnected arched channels 30, each of the channels. 30 extending from one side of the absorbent, along the center line extending longitudinally 12, to the other side of the absorbent. Each of the channels 30 crosses at least one other channel 30 at an oblique angle related to it and each of the channels 30 extends along the central line extending longitudinally 12 at an oblique angle to it. Each of the first and second portions 27 and 29 further includes a substantially U-shaped end channel 31. Each of the channels 30, in a distal portion thereof (i.e., that portion of channel 30 located as far away as possible). from the intersection between the central line extending longitudinally 12 and the central line extending transversely 14), it intersects with, and ends at, the end channel 31.
    [011] Each of the channels 30 is substantially arched in shape and has a length in the range of about 2 cm to about 10 cm, more preferably from about 5.0 cm to about 8.0 cm, when measured at along the path of the channel 30. Each of the channels 30 has a width in the range of about 1 mm to about 10 mm, more preferably from about 2 mm to about 4.0 mm. Each of the channels 30 has a depth of about 0.5 mm to about 5 mm, more preferably from about 1 mm to about 3 mm, when measured from a top surface of the absorbent 10. Each channel end 31 has a length in the range of about 5 cm to about 25 cm, more preferably about 10 cm to about 15 cm. Each end channel 31 has a depth of about 0.5 mm to about 5 mm, more preferably about 1 mm to about 3 mm, when measured from an absorbent top surface 10.
    [012] The channels 30 work to transport fluids towards the end regions 24 and 25 of the absorbent 10, so as to use the total absorbent capacity of the article along its length. The end channels 31 function to prevent fluid from being transported to the absolute end of the absorbent, and thus serve to prevent leakage at the end, i.e., leakage of fluid beyond the transverse edges 20 and 22 of the absorbent. In this sense, the channels 31 are preferably spaced in relation to their respective transverse edge, 20 and 22 respectively, from the absorber by a distance of about 5 mm to about 30 mm, more preferably from about 10 mm to about 20 mm.
    [013] Absorbent 10 further includes a second embossing pattern 32. The second embossing pattern 32 is generally located in the central region 28 of absorbent 10. The second embossing pattern 32 includes at least one channel extending longitudinally 35. Absorbent articles according to the present invention preferably have between about 1 and about 5 channels 35. In the specific embodiment shown in figure 1, the second embossing pattern 32 includes three channels that generally extend in a longitudinal 35a, 35b and 35c. The longitudinally extending channel 35a is coextensive with the longitudinally extending central line 12 and is symmetrically arranged in relation to it. Each of the channels 35b and 35c are arranged in a spaced relation to the channel 35a and are, in general, an arcuate shape. In addition, the channels 35b and 35c are arranged symmetrically with respect to the longitudinally extending central line 12 and are formed in such a way that they are concave with respect to the centrally extending longitudinally line 12. Each of the channels 35a, 35b and 35c preferably have a length in the range of about 3 cm to about 15 cm, more preferably from about 4.5 cm to about 10 cm, when measured along a path of the channel . Preferably each channel 35a, 35b and 35c has a width in the range of about 1 mm to about 20 mm, more preferably about 2 mm to about 10 mm. Each of the channels 35a, 35b and 35c preferably has a width in the range of about 1 mm to about 10 mm, more preferably between about 2 mm and about 5 mm.
    [014] Preferably, at least one of the channels 35a, 35b and 35c intersects with at least one of the channels 30 in the first end region 24 and at least one of the channels 30 in the second end region 25. In the specific embodiment of the invention shown in Figure 1, the channel 35a crosses, at the respective ends of it, with a channel 30 in the first end region 24 and another channel 30 located in the second end region 25. The interconnection of channel 35a with the first 27 and second 29 portions of the The first embossing pattern 26 allows the sanitary napkin 10 to absorb fluids by capillary effect effectively, from the central region 28 of the napkin 10 to the end regions 24 and 25 of the napkin. In this way, the total absorbent capacity of the absorbent 10 is used.
    [015] In an embodiment of the invention, as seen best explored navigator shown in figure 2, the sanitary napkin 10 includes a fluid-permeable cover layer 52, a first absorbent layer 54, a second absorbent layer 56, and a barrier layer fluid impervious 58. The first absorbent layer 54 includes a plurality of material-free zones that extend longitudinally 60, extending from the upper surface 62 of the first absorbent layer 54 to a lower surface 64 of the first absorbent layer 54. Each of material-free zones 60 preferably have a length of about 3 cm to about 15 cm, more preferably about 4.5 cm to about 10 cm, when measured along a path of the free zone material 60. Each of the material-free zones 60 preferably have a width in the range of about 1 mm to about 20 mm, more preferably about 2 mm to about 10 mm. It should be noted that each of the material-free zones corresponds in size, shape and location to channels 35a, 35b and 35c.
    [016] Absorbent articles according to the present invention preferably have between about 1 and about 5 material-free zones that extend longitudinally 60. Each of the material-free zones 60 are spaced apart from an area free of material. adjacent material 60 in the transverse direction, for a distance of about 0.5 cm to about 3 cm. The material-free zones 60 preferably extend over a surface area in the range of between 50 mm2 and about 4,000 mm2.
    [017] As can be seen better in figure 3, the cover layer 52 includes a plurality of first regions 66 that are arranged in a spaced relationship with the second absorbent layer 56 and a plurality of second regions 68 that are arranged in surface contact. the surface with the second absorbent layer 56. This structure is formed during the manufacture of the hygienic absorbent 10 through the use of a embossing cylinder that has a surface pattern that corresponds in size and shape to the channels 35a, 35b and 35c. Specifically, the cover 52 is embossed in such a way that the regions 68 of the cover 52 are arranged in a surface-to-surface contact with the second absorbent layer 56. Additionally, also during the embossing process, the second absorbent layer 56 is embossed to form channels 70a, 70b and 70c in the second absorbent layer 56 which corresponds in shape and location to channels 35a, 35b and 35c. In fact, the embossing cylinder used during manufacture must also have the surface characteristics used to form the first embossing pattern 26.
    [018] The arrangement of regions 68 in a surface-to-surface contact with the second absorbent layer 56 allows the sanitary pad 10 according to the present invention to rapidly absorb fluids in the center of the pad where such "flow management" is required. In addition, the regions 66 of the cover, together with the channels 35a, 35b and 35c, allow absorption by effective capillary effect of fluid in the end regions 24 and 25 of the absorbent. In this way, the sanitary napkin 10 according to the present invention can provide effective "flow management" while effectively utilizing the total absorbent capacity of the napkin 10 along its length.
    [019] A sanitary napkin 10a, according to the second embodiment of the present invention, is shown in figures 4 to 6. The sanitary napkin 10a has substantially the same structure as that of the sanitary napkin 10 described above. However, in the embodiment of the invention shown in figures 4 to 6, the "channels" 35a, 35b and 35c are not discontinuous, as in the absorber 10 described above, but are instead formed from a plurality of recessed regions arranged in distinctly 80. As shown in figure 4, each recessed region 80 is arranged in a spaced relation to an adjacent recessed region 80. The lowered regions 80 cooperate collectively to define the "interrupted" channels 35a, 35b and 35c. In the particular embodiment of the invention shown in figures 4 to 6, each recessed region 80 has a circular shape, as shown in detail in figure 5. In the embodiment shown in figures 4 to 6, the first absorbent layer 54 includes a plurality of material-free zones 60 each corresponding in shape, size and location to a corresponding recessed region 80, one of such material-free zones 60 and corresponding recessed regions 80 being shown in detail in figure 6.
    [020] A sanitary napkin 10b, according to a third modality of the present invention, is shown in figures 7 to 9. The sanitary napkin 10b has substantially the same structure as that of the sanitary napkin 10a described above with reference to figures 4 a 6. However, in the embodiment of the invention shown in figures 7 to 9, each recessed region 80a has a rectangular or diamond shape, as shown in detail in figure 8.
    [021] A sanitary napkin 10c, according to a fourth embodiment of the present invention, is shown in figures 10 and 11. The sanitary napkin 10c has, substantially, a structure identical to that of the sanitary napkin 10 described above. However, as shown in figure 10, the channels 35a, 35b and 35c are provided with colors, so as to provide a colored warning that is visible to a user from a top surface of the absorbent 10c. As shown in figure 11, the color notice can be provided by printing colored regions 92 on the cover layer 52. Colored regions 92 preferably correspond in size, shape and location to channels 35a, 35b and 35c. The function of the colored regions 92 is to provide the user with a colored warning regarding the presence and function of the channels 35a, 35b and 35c. The colored regions 92 can alternatively be printed on the second absorbent layer 56, provided that such colored regions 92 can be seen through a cover 52. Any means known to those skilled in the art can be used to provide the colored regions 92, such as printing , use of colored fibers, or any other suitable means.
    [022] A sanitary napkin 10d, according to a quintamodality of the present invention, is illustrated in figures 12 to 15. The sanitary napkin 10d includes a main absorbent body 11, a longitudinally extending center line 12, a center line that extends transversely extends 14, a first longitudinal edge 16, a second longitudinal edge 18, a first transverse edge 20, a second transverse edge 22, a first end region 24, a second end region 25, and a central region 28 located between the first and second end regions 24 and 25.
    [023] The absorbent 10d further includes a first gouging pattern 94. The first embossing pattern 94 has a first portion 96 disposed in the first end region 24 and a second portion 98 located in the second end region 25, causing the first and second portions 27 and 29 to be spaced in relation to each other in the longitudinal direction of the absorber 10d. Each of the first portion 96 and the second portion 98 comprise a plurality of interconnected channels 100. As shown in Figures 12 and 14, interconnected channels 100 define a plurality of protuberances 102 between them. When absorbent 10d is used, protuberances 102 they are positioned adjacent (or in contact with) and facing the user's body. Each of the channels 100 preferably has a depth in the range of about 1 mm to about 10 mm. Consequently, an apex 103 (as best seen in Figure 14) of each protuberance preferably extends from about 1 mm to about 10 mm above the base surface 104 of the surrounding channels 100.
    [024] As shown in figure 12, each protrusion 102 is substantially entirely surrounded by at least one of the channels 100. The channels 100 that surround each protuberance 102 are in general regions of reduced thickness or higher density than that of protuberance 102 which is circled. Preferably, the channels 100 are connected to form a continuous network of interconnected channels 100.
    [025] The absorbent 10d further includes a second gouging pattern 32. The second embossing pattern 32 is generally located in the central region 28 of the absorbent 10d. The second embossing pattern 32 includes at least one longitudinally extending channel 35. Absorbent articles according to the present invention preferably have between about 1 and about 5 channels 35. In the specific embodiment shown in figure 12 , the second embossing pattern 32 includes three channels which generally extend longitudinally 35a, 35b and 35c. The longitudinally extending channel 35a is coextensive with the longitudinally extending central line 12 and is symmetrically arranged in relation to it. Each of the channels 35b and 35c are arranged in a spaced relation to the channel 35a and are, in general, an arcuate shape. In addition, the channels 35b and 35c are arranged symmetrically with respect to the longitudinally extending center line 12 and are formed in such a way that they are concave with respect to the longitudinally extending center line 12. Each of the channels 35a, 35b and 35c preferably has a length in the range of about 3 cm to about 15 cm, more preferably about 4.5 cm to about 10 cm, when measured along a path of the channel. Each of the channels 35a, 35b and 35c preferably has a width in the range of about 1 mm to about 20 mm, more preferably about 2 mm to about 10 mm. Each of the channels 35a, 35b and 35c preferably has a depth in the range of about 1 mm to about 10 mm.
    [026] Preferably, at least one of the channels 35a, 35b and 35c intersects with at least one of the channels 100 in the first end region 24 and at least one of the channels 100 in the second end region 25. In the specific embodiment of the invention shown in figure 12, the channel 35a crosses, at the respective ends of it, with a channel 100 in the first end region 24 and another channel 100 located in the second end region 25. The interconnection of channel 35a with the first 27 and second 29 portions of the first embossing pattern 26 allows the sanitary pad 10d to absorb fluids by capillary effect effectively, from the central region 28 of the pad 10 to the end regions 24 and 25 of the pad. In this way, the total absorbent capacity of the absorbent 10d is used.
    [027] As shown in figure 12, the sanitary napkin 10d also includes a embossed ring 106. Embossed ring 106 works to block the flow of fluids out of the area enclosed by the ring and thereby assist in preventing lateral leakage and end. Embossed ring 106 preferably has a width in the range of about 1 mm to about 10 mm, and a depth in the range of about 1 mm to about 10 mm. In the particular embodiment shown in figure 12, the embossed ring 106 is spaced out in relation to the first embossing pattern 94 and the second embossing pattern 32. Preferably, the embossing ring is spaced out from the first 94 and according to 32 embossing patterns, for a distance of about 2 mm to about 30 mm. In the particular embodiment of the invention shown in figure 12, the longitudinal end regions 108 and 110 of the embossing ring 106 are further spaced from the first 94 and second 32 embossing patterns, in comparison to the lateral regions 112 and 114 of the ring embossing 106.
    [028] Preferably, the embossed ring 106 is continuous, that is, it is not interrupted along its length, and completely surrounds the first embossing pattern 94 and the second embossing pattern 32. In the particular embodiment of the invention shown in figure 12 , embossed ring 106 is arranged so that it is spaced inwardly from a peripheral edge 107 of main absorbent body 11 of absorbent 10d. Preferably the embossed ring 106 is spaced inwardly from the peripheral edge 107 of the main absorbent body 11 by a distance of about 5 mm to about 60 mm.
    [029] In an embodiment of the sanitary napkin 10d shown in figure 15, the sanitary napkin 10d includes a fluid-permeable cover layer 52, a first absorbent layer 54, a second absorbent layer 56, and a fluid-impermeable barrier layer 58. In the embodiment of the invention shown in figure 15 the first absorbent layer 54 does not include any free zones of material 60 as described above in relation to the first embodiment 10 of the invention. However, the sanitary pad 10d could be constructed with these material-free zones 60, if desired.
    [030] In relation to figures 13 and 14, the first embossing pattern 94 and the second embossing pattern 32 are structured and arranged in such a way that the embossed regions of the same, that is to say channels 100, the embossed ring 106 and the channels 35a, 35b and 35c, are formed so that they extend into the cover layer 52, the first absorbent layer 54 and the second absorbent layer 56. Covering layer
    [031] Covering layer 52 may be a relatively low density, bulky and highly aerated nonwoven material. The cover layer 52 may be composed of only one type of fiber, such as polyester or polypropylene, or it may include a mixture of more than one fiber. The cover can be composed of bicomponent or conjugated fibers that have a component with a low melting point and a component with a high melting point. The fibers can be selected from a variety of natural and synthetic materials such as nylon, polyester, rayon (in combination with other fibers), cotton, acrylic fiber and the like, as well as combinations thereof. Preferably, the cover layer 52 has a base weight in the range of about 10 gsm to about 75 gsm.
    [032] Two-component fibers can be made of a polyester layer and a polyethylene sheath. The use of suitable bicomponent materials results in a meltable non-woven cloth. Examples of such meltable cloths are described in US Patent No. 4,555,430 issued on November 26, 1985 to Chicopee. The use of a fusible cloth increases the ease with which the cover layer can be mounted on the absorbent layer and / or the barrier layer.
    [033] The cover layer 52 preferably has a relatively high degree of wettability, although the individual fibers comprising the cover may not be particularly hydrophilic. The covering material must also contain a large number of relatively large pores. This is necessary because the cover layer 52 is designed to absorb body fluids quickly and transport them away from the body and the deposition point. Therefore, the covering layer contributes little to the time that the absorbent takes to absorb a certain amount of liquid (penetration time).
    [034] Advantageously, the fibers that form the covering layer 52 should not lose their physical properties when moistened, in other words, they should not break apart or lose their resilience when subjected to water or body fluid. The cover layer 52 can be treated to allow the fluid to pass through it readily. The cover layer 52 also works to transfer the fluid quickly to the underlying layers of the absorbent. In this way, the cover layer 52 is advantageously wettable, hydrophilic and porous. When composed of synthetic hydrophobic fibers such as polyester fibers or bicomponent fibers, the cover layer 52 can be treated with a surfactant to provide the desired degree of wettability.
    [035] Alternatively, cover layer 52 may also be produced from polymeric films that have large pores. Due to this high porosity, the film fulfills the function of quickly transferring the body fluid to the inner layers of the underlying absorbent layers.
    [036] The cover layer 52 can be attached to the underlying absorbent layers 54 and 56, and / or to the barrier layer 58, by adhesion and / or by other suitable means known to those skilled in the art.
    [037] A material particularly suitable for use as a cover layer 52 is a 27 gram per square meter (gsm) hot air glue (commercially available) from Shalag Nonwovens Ltd., Upper Galilee , Israel, with product code HTA STA5ETW27. First absorbent layer
    [038] The first absorbent layer 54 may be composed of fibrous materials, such as wood pulp, polyester, rayon, flexible foam or the like, or combinations thereof. The first absorbent layer 54 may also optionally include a superabsorbent polymeric material (SAP). The first absorbent layer 54 may also comprise thermoplastic fibers for the purpose of stabilizing the layer and maintaining its structural integrity. The first absorbent layer 54 can be treated with a surfactant on one or both sides to increase its wettability, although generally the first absorbent layer 54 is relatively hydrophilic and may not need treatment. The first absorbent layer 54 is preferably attached on both sides to the adjacent layers, i.e., to the cover layer 52 and to the second underlying absorbent layer 56.
    [039] In specific embodiments of the present invention, the first absorbent layer 54 can be a "transfer" layer. The transfer layer provides a means for receiving body fluid from the fluid-permeable cover layer 52 and retaining such fluid until the second absorbent layer 54 has an opportunity to absorb it. The transfer layer is preferably denser than the fluid-permeable cover layer 52 and has a larger proportion of smaller pores than the previous one. These attributes allow the transfer layer to retain the body fluid and keep it away from the outer side of the fluid-permeable cover layer 52, thereby preventing the fluid from returning to the fluid-permeable cover layer 54 and its surface. However, the transfer layer is preferably not as dense in order to prevent the passage of fluid through the transfer layer and up to the second underlying aborbent layer 54.
    [040] When constructed as a transfer layer, the first absorbent layer 52 may comprise various materials, including, for example, cellulose fibers such as wood pulp, single component or bicomponent fibers that include thermoplastic materials (such as polyester, polypropylene) , polyethylene, among others) in fiber or other forms, rayon, organic binders (such as vinyl copolymers, acrylic and / or other monomers that can be coated in thermoplastic fibers or otherwise incorporated into the transfer layer) among other materials known in the technical.
    [041] A particularly useful material such as the first absorbent layer 52 is a material produced by air deposition (airlaid) of 90 grams per square meter (gsm) including pulp fibers, two-component fibers and a synthetic binder commercially available from Glatfelter Gatineau Ltd., Gatineau, Canada with product code MH090.102. Second absorbent layer
    [042] The second absorbent layer 56 may comprise a single layer of material or may comprise multiple layers. In preferred embodiments of the present invention, the second absorbent layer 56 functions as the absorbent core of the sanitary napkin 10. In preferred embodiments of the present invention the second absorbent layer 56 functions as an absorbent core. Preferably, this absorbent core has a high total absorbent capacity and retains the fluid received from the transfer layer. In addition, the absorbent core preferably has a higher density than that of the transfer layer.
    [043] In one embodiment, the second absorbent layer 56 is a blend or mixture of cellulosic and superabsorbent fibers disposed on it. Cellulosic fibers that can be used in the second absorbent layer 56 are well known in the art and include wood pulp, cotton, linen and peat moss. Wood pulp is preferred. The pulps can be obtained from mechanical or chemomechanical processes, sulfite, brown paper, rejected pulping materials, pulps based on organic solvent, etc. Both softwood and hardwood species are useful. Softwood pulps are preferred. It is not necessary to treat cellulosic fibers with chemical de-agglutinating agents, cross-linking agents and the like for use in the present material. Some portion of the pulp can be chemically treated, as discussed in US Patent No. 5,916,670, to improve the flexibility of the product. The flexibility of the material can also be improved by mechanically working the material or softening the material.
    [044] The second absorbent layer 56 can contain any superabsorbent polymer (SAP), which are well known in the art. For the purposes of the present invention, the term "superabsorbent polymer" (or "SAP" - superabsorbent polymer) refers to materials that are capable of absorbing and retaining at least about 10 times their weight in copolytic fluids under a pressure 3.4 kPa (0.5 psi). The superabsorbent polymer particles of the invention can be inorganic or organic cross-linked hydrophilic polymers, such as polyvinyl alcohols, polyethylene oxides, cross-linked starches, guar gum, xanthan gums and the like. The particles can be in the form of powder, grains, granules, or fibers. Preferred superabsorbent polymer particles for use in the present invention are cross-linked polyacrylates, such as the product offered by Sumitomo Seika Chemicals Co., Ltd. of Osaka, Japan, under the trade name SA70N, and the products offered by Stockhausen Inc. In a specific example , the second absorbent layer 56 is a material that contains about 90% to about 40% percent cellulosic fiber, and about 10% to about 60% SAP. The second absorbent layer 56 may comprise a material produced using air deposition means well known in the art.
    [045] Another useful material in the second absorbent layer 56, particularly in the embodiment of the invention shown in Figures 12 to 15, is a pin-embossed material formed from wood pulp and superabsorbent polymer of the type described in US patent application number standard 12 / 855.070. Barrier layer
    [046] Below the second absorbent layer 56 is a barrier layer 58 that comprises liquid-impermeable skin material, in order to prevent liquid that is trapped in the absorbent layer 56 from leaving the sanitary napkin and staining the user's underwear. Barrier layer 58 is preferably produced from polymeric film, despite the fact that it can be produced from liquid-impermeable and air-permeable material such as repellent-treated nonwovens, or micropore films or foams. .
    [047] Barrier layer 58 can be breathable, that is, it allows steam to transpire. Known materials for this purpose include non-woven materials and microporous films in which microporosity is created by, among others, stretching an oriented film. Single or multiple layers of permeable films, cloths, materials produced by melting and blowing, and combinations thereof, which offer a tortuous trajectory and / or whose surface characteristics offer a liquid-repellent surface can also be used to obtain a layer breathable bottom. The cover layer 52 and the barrier layer 58 are preferably joined along their marginal portions so as to form a closure or flange seal that holds the absorbent layers 54 and 56 attached. The connection can be made by means of adhesives, hot connection, connection by ultrasound, radio frequency sealing, mechanical crimping, and the like, and combinations thereof.
    [048] A positioning adhesive can be applied to the garment-facing surface of barrier layer 58 to bond absorbent 10 to a garment during use. The positioning adhesive can be covered with a removable protective paper, so that the positioning adhesive is covered with a removable protective paper before use.
    [049] The absorbent articles of this invention may include either wings, flaps or ears for attaching the absorbent article to underwear. Wings, also called, among other things, flaps or fins, and their use in protective sanitary articles are described in US Patent No. 4,687,478 to Van Tilburg, US Patent No. 4,589,876 also to Van Tilburg, US Patent No. 4,900,320 to McCoy, and in US Patent No. 4,608,047 to Mattingly. The descriptions of these patents are hereby incorporated by reference in their entirety. As shown in the documents above, wings are generally flexible and configured to be folded over the edges of the underwear, so that the wings are arranged between the edges of the underwear.
    [050] As illustrated by the above description and the accompanying drawings, absorbent articles according to the present invention provide a structure that allows such an article to provide superior capillary absorption characteristics while at the same time providing fluid penetration characteristics higher.
    权利要求:
    Claims (12)
    [0001]
    1. Hygienic absorbent article (10), comprising: a fluid-permeable cover layer (52); a first absorbent layer (54); a second absorbent layer (56); a fluid-impermeable barrier layer (58); a longitudinally extending central line (12), a transversely extending central line (14), a first end region (24) and a second end region (25), a central region (28) disposed between the first and second end regions (24, 25), a first longitudinal edge (16), a second longitudinal edge (18), a first transverse edge (20), a second transverse edge 22), a main absorbent body (11); characterized by the fact that a first carving pattern (26) having a first portion (27) disposed in the first end region (24) and a second portion (29) disposed in the second end region (25), each one of the first and second portions (27, 28) including a plurality of channels (30 ) interconnected, with the interconnected channels (30) defining a plurality of protuberances (102) facing the body, a second embossing pattern (32) including a pen (35) arranged in the central region (28) and extending in a longitudinal direction of the article, with one channel (35) crossing one of the plurality of channels (30) interconnected in the first end region (24) and one of the plurality of interconnected channels in the second end region (25) . wherein the embossed regions of the first and second patterns and embossing are formed so that they extend into the cover layer, first absorbent layer and second absorbent layer.
    [0002]
    2. Hygienic absorbent article (10), according to claim 1, characterized by the fact that an apex (103) of each of the protuberances (102) extends 1 mm to 10 mm above a surface of the base of a channel surrounding interconnected.
    [0003]
    3. Hygienic absorbent article (10), according to claim 2, characterized by the fact that each protuberance (102) is entirely surrounded by one of the interconnected channels (30).
    [0004]
    4. Hygienic absorbent article (10) according to claim 3, characterized by the fact that the plurality of interconnected channels (30) defines a continuous network of channels (30).
    [0005]
    5. Hygienic absorbent article (10) according to claim 4, characterized by the fact that a longitudinally extending channel (35) comprises a plurality of longitudinally extending channels (80), one of the channels (35) which extends longitudinally being coextensive with the central line of the article that extends longitudinally, and the other channels (35) that extend longitudinally being arranged in a spaced relationship with the channel (35) that is coextensive with the central line that extends longitudinally (12).
    [0006]
    6. Hygienic absorbent article (10), according to claim 5, characterized by the fact that the channel (35) that extends longitudinally that is coextensive with the central line that extends longitudinally (12), crosses one of the plurality of channels (30) in the first end region (24) and one of the plurality of channels in the second end region (25).
    [0007]
    An absorbent, hygienic article (10) according to claim 6, characterized by the fact that each of the plurality of channels (35) extending longitudinally is a continuous channel (35).
    [0008]
    8. Hygienic absorbent article (10) according to claim 7, characterized by the fact that the first portion (27) is arranged spaced in relation to the second portion (28).
    [0009]
    9. Hygienic absorbent article (10) according to claim 8, characterized by the fact that it still comprises a embossed ring.
    [0010]
    10. Hygienic absorbent article (10), according to king-vindication 9, characterized by the fact that the embossed ring (106) is spaced out in relation to the first (94) and second (32) embossing patterns.
    [0011]
    11. Hygienic absorbent article (10), according to the vindication king 10, characterized by the fact that the embossed ring (106) is structured and arranged so that the first (108) and second (110) end regions of the embossed ring (106) are more widely spaced from the first and second embossing patterns compared to the first (112) and the second (114) side region of the embossed ring (106).
    [0012]
    12. Hygienic absorbent article (10), according to the vindication king 11, characterized by the fact that the embossed ring (106) is spaced inwardly in relation to a peripheral edge (107) of the main absorbent body (11).
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    同族专利:
    公开号 | 公开日
    RU2012132655A|2014-02-10|
    US20120004633A1|2012-01-05|
    CN102949268A|2013-03-06|
    RU2628895C2|2017-08-22|
    CA2784505C|2019-01-15|
    CO6860306A1|2014-02-10|
    BR102012019914A2|2014-02-18|
    CA2784505A1|2013-02-09|
    US20180071154A1|2018-03-15|
    AU2012211368A1|2013-02-28|
    US8975466B2|2015-03-10|
    CN102949268B|2015-11-18|
    ZA201205996B|2014-07-30|
    EP2556810B1|2015-07-29|
    AU2012211368B2|2015-06-18|
    EP2556810A1|2013-02-13|
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    法律状态:
    2014-02-18| B03A| Publication of a patent application or of a certificate of addition of invention [chapter 3.1 patent gazette]|
    2018-12-11| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-11-05| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-11-24| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application [chapter 6.1 patent gazette]|
    2021-03-02| B09A| Decision: intention to grant|
    2021-04-13| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 08/08/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13205790|2011-08-09|
    US13/205,790|US8975466B2|2009-04-29|2011-08-09|Absorbent article including a plurality of longitudinally extending channels|
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