• 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 THAT INCLUDES AN ABSORBENT CORE LAYER THAT HAS A MATERIAL-FREE ZONE AND A TRANSFER LAYER UNDER THE ABSORBENT CORE LAYER. The present invention relates to an absorbent article which includes a liquid-permeable cover layer, a liquid-impermeable barrier layer, an absorbent core disposed adjacent to the cover layer, the absorbent core including a material-free zone extending, a transfer layer disposed between the core and the barrier layer, the transfer layer including a planar portion having an upper surface and a lower surface and a protuberance extending upwards from the upper surface .
    公开号:BR102012031905B1
    申请号:R102012031905-5
    申请日:2012-12-14
    公开日:2020-11-24
    发明作者:Kofi Bissah；Francisco J. V. Hernandez；Fernanda Wiermann Paques；John Poccia
    申请人:Mcneil-Ppc, Inc.；
    IPC主号:
    专利说明:

    [0001] [0001] This application is a continuation in part of U.S. Patent Application Serial No. 12 / 554,047 filed on September 4, 2009, whose priority is hereby claimed. FIELD OF THE INVENTION
    [0002] [0002] The present invention relates, in general, to sanitary napkins and, in particular, to a sanitary napkin that has superior absorption characteristics due to transversal and longitudinal capillary effect, as well as superior time properties for fluid penetration and remolagem. BACKGROUND OF THE INVENTION
    [0003] [0003] For a sanitary napkin 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 sanitary napkin.
    [0004] [0004] 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. Consequently, the inventors of the present invention have recognized the need to obtain a hygienic absorbent that, by capillary effect, efficiently absorbs fluids in the longitudinal and transverse directions of the absorbent, so as to fully use its full absorbent capacity, while providing properties periods of time for fluid penetration and remoiling. SUMMARY OF THE INVENTION
    [0005] [0005] In accordance with the above, the present invention presents, according to a first aspect, an absorbent article containing a longitudinally extending central line, a transverse extending central line, a liquid-permeable covering layer which has a surface facing the user's body, a liquid impermeable barrier layer, an absorbent core adjacent to the cover layer, the absorbent core having an upper surface and a lower surface and a material-free zone extending from the upper surface to the lower surface, a transfer layer between the core and the barrier layer, the transfer layer having a planar portion having an upper surface and a lower surface and a protrusion extending upwards from the upper surface, the covering layer having a first region arranged in a spaced relation with the transfer layer and a second region arranged in surface-to-surface contact with the transfer layer, the protuberance being structured and arranged to be received, and extended upwards, in the material-free zone, and the protuberance having a greater height that the distance between the upper surface of the absorbent core and the lower surface of the absorbent core.
    [0006] [0006] The present invention features, according to the second aspect of the invention, an absorbent article that includes a longitudinally extending center line, a transversely extending center line, a liquid-permeable covering layer that has a surface facing the user's body, a liquid-impermeable barrier layer, an absorbent core disposed adjacent to the cover layer, the transfer layer including a planar portion having an upper surface and a lower surface and a plurality of protrusions extending upwards from the upper surface, the absorbent core including an upper surface and a lower surface, the absorbent core comprising a plurality of beams and a plurality of material-free zones, each beam being arranged in a spaced relation of an adjacent beam and each beam is separated from the adjacent beam by an area free of ma terial, each of the material-free zones extending from the upper surface to the lower surface, the covering layer including a plurality of first regions arranged in a spaced relationship with the transfer layer and a plurality of second ones regions, each of the second regions being located between two adjacent beams and arranged in surface-to-surface contact with the transfer layer, each of which among a plurality of protuberances is structured and arranged to be received in, and to extend upwards and inwards, one of the plurality of material-free zones, and each protuberance has a height greater than the distance between the upper surface of the absorbent core and the lower surface of the absorbent core. BRIEF DESCRIPTION OF THE DRAWINGS
    [0007] [0007] Examples of embodiments of the present invention will now be described with reference to the drawings, in which: figure 1 is a top perspective view of an absorbent article according to the present invention; figure 2 is a bottom perspective view of the absorbent article shown in figure 1; figure 3 is an exploded view of the absorbent article shown in figure 1, according to a first embodiment of the invention, figure 4 is a sectional view of the absorbent article shown in figure 1, taken along line 4-4 of figure 1, figure 5 is a partially cut-away perspective view of the absorbent article shown in figure 1, schematically representing the trajectory or flow of fluids within the article, figure 6 is an exploded view of the absorbent article shown in figure 1, according to a second embodiment of the invention, figure 7 is a sectional view of the absorbent article shown in figure 6, taken along line 7-7 in figure 6, figure 8 is a top perspective view of an absorbent article according to a third embodiment of the present invention, figure 9 is an exploded view of the absorbent article shown in figure 8, figure 10 is a sectional view of the absorbent article shown in figure 8, taken along line 10-10 in figure 8, figure 11 is a top perspective view of an absorbent article according to a fourth embodiment of the present invention; figure 12 is an exploded view of the absorbent article shown in figure 11; figure 13 is a sectional view of the absorbent article shown in figure 11 and taken along line 13-13 of figure 11; figure 14 is a top perspective view of an absorbent article according to a fifth embodiment of the present invention, figure 15 is an exploded view of the absorbent article shown in figure 14; Figure 16 is a sectional view of the absorbent article shown in Figure 15, taken along line 16-16 in Figure 14. DETAILED DESCRIPTION OF THE INVENTION
    [0008] [0008] 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 is described herein with reference to a sanitary napkin, the invention can be used with other disposable sanitary napkin articles, such as incontinence absorbent products, diapers, panties and the like.
    [0009] [0009] The absorbent articles according to the present invention provide superior characteristics of fluid handling and, more specifically, provide superior characteristics of absorption by longitudinal and transverse capillary effect, as well as superior properties of time for fluid penetration and recovery.
    [0010] [00010] As shown in Figures 1 to 4, the present invention relates to a sanitary napkin 10 intended for the absorption of body fluids. The sanitary pad 10 includes a surface facing the user's body 11, a surface facing the garment 13, a longitudinally extending center line 15 and a transversely extending center line 17.
    [0011] [00011] As best shown in the exploded view of Figure 3, the sanitary pad 10 includes a fluid-permeable cover layer 12, an absorbent core 14, a transfer layer 16, and a fluid impermeable barrier layer 18. As shown in Figure 3, the absorbent core 14 is disposed adjacent to the cover layer 12 and the transfer layer 16 is disposed between the absorbent core 14 and the barrier layer 18.
    [0012] [00012] The absorbent core 14 includes a material-free zone 20 which is devoid of any absorbent material. The material-free zone 20 extends from an upper surface 19 of the absorbent core 14 to the lower surface 21 of the absorbent core 14. The material-free zone 20 can be formed by any known method, such as cutting or the like. In the specific embodiment of the invention shown in figures 1 to 4, the material-free zone 20 is centrally aligned with respect to the longitudinally extending centerline 15 and the centrally extending line transversely 17. In the specific embodiment of the invention shown in the Figures 1 to 4, the material-free zone 20 is substantially elliptical in shape and preferably has a length, measured along the longitudinally extending center line 15, in the range of about 40 mm to about 160 mm and a width, measured along the central line extending transversely 17, from about 10 mm to about 60 mm. The material-free zone 20 preferably extends over a surface area in the range between 400 mm2 and about 6,000 mm2.
    [0013] [00013] As can be seen better in figure 4, the cover layer 12 includes a first region 22 located outside the area of the material-free zone 20 which is arranged in a spaced relation with the transfer layer 16, and the layer of The cover includes a second region 24 within the area defined by the material-free zone 20 which is arranged in surface-to-surface contact with the transfer layer 16. The surface-to-surface contact of the cover layer 12 with the transfer layer 16 defines essentially a trough 29 on the surface 11 facing the body of the sanitary napkin user 10. The absorbent core 14 is preferably between about 0.5 mm and about 20 mm thick. The depth of the chute 29 is in the range of about 0.5 mm to about 20 mm.
    [0014] [00014] The thickness and depth measurements presented in this paragraph can be determined using a suitable thickness gauge, such as the Mitutoyo Absolute Gauge or equivalent.
    [0015] [00015] Reference is made to figure 5, which represents the way in which the fluid is conducted within the absorbent structure of an absorbent item 10 according to the present invention. As shown, transfer layer 16 receives fluid directly from cover layer 12 in the area of the material-free zone 20. Transfer layer 16, in turn, transfers fluid in the longitudinal and transverse directions of the sanitary pad by capillarity until the fluid can be moved upwards and absorbed into the absorbent core 14.
    [0016] [00016] Reference is made to figure 6, which represents an exploded view of a sanitary napkin 10a according to a second embodiment of the present invention. The sanitary napkin 10a has a structure similar to that of the sanitary napkin 10 described above, but it also includes a secondary absorbent core 26 disposed between the primary absorbent core 14 and the transfer layer 16. As shown, the secondary absorbent core 26 includes a non-absorbent zone. material 28 corresponding in size and shape to the material-free zone 20 of the primary absorbent core 14. The material-free zone 28 extends from an upper surface 35 of the secondary absorbent core 26 to the lower surface 37 of the secondary absorbent core 26 .
    [0017] [00017] With reference to figure 7, the covering layer 12 includes a first region 22 located outside the material-free zones 20 and 28 that are arranged in a spaced relationship with the transfer layer 16, and the covering layer includes a second region 24 within the area of material-free zones 20 and 28 which are arranged in surface-to-surface contact with the transfer layer 16. The surface-to-surface contact of the cover layer 12 with the transfer layer 16 essentially defines a trough 29 on the surface facing the body of the hygienic absorbent user 10. The primary absorbent core 14 and the secondary absorbent core 28 are preferably between about 0.5 mm and about 20 mm thick. The depth of each chute 29 is in the range of about 1.0 mm to about 40 mm.
    [0018] [00018] Reference is made to Figures 8 to 10, which represent a sanitary napkin 10b according to a third embodiment of the present invention. As shown in figure 9, the sanitary pad 10b includes a fluid-permeable cover layer 12, an absorbent core 14, a transfer layer 16, and a fluid-impermeable barrier layer 18. As shown in figure 9, the absorbent core 14 is disposed adjacent to cover layer 12 and transfer layer 16 is disposed between absorbent core 14 and barrier layer 18.
    [0019] [00019] As is best seen in the exploded view shown in Figure 9, the absorbent core 14 includes a plurality of material-free zones 20 extending longitudinally from an upper surface 19 of the absorbent core 14 and to a lower surface 21 of the absorbent core 14. Each material-free zone 20 preferably has a width in the range of between 1 mm and about 10 mm, and a length in the range of between about 50 mm and about 250 mm. Absorbent articles according to the third embodiment of the present invention preferably have between about 2 and about 7 regions 20 free of material that extend longitudinally. Each material-free zone 20 is spaced from a material-free zone 20 adjacent in the transverse direction by a distance of about 5 mm to about 30 mm. Each material-free zone 20 preferably extends over a surface area in the range between about 50 mm2 and about 4,000 mm2. In the specific embodiment of the invention shown in figures 8 to 10, the material-free zones 20 are linear in shape, parallel to each other and equally spaced.
    [0020] [00020] The absorbent core 14 additionally includes a plurality of beams 25 extending longitudinally, each of the beams 25 being arranged in a spacing relationship with an adjacent beam 25, and each of the beams 25 being separated from an adjacent beam 25 by one of the material-free zones 20.
    [0021] [00021] As can be better seen in figure 10, the cover layer 12 includes a plurality of first regions 22 that are arranged in a spacing relationship with the transfer layer 16, and a plurality of second regions 24 that are arranged in surface to surface contact with the transfer layer 16.
    [0022] [00022] The surface-to-surface contact of the covering layer 12 with the transfer layer 16 in the second regions 24 essentially defines a plurality of rails 29 extending longitudinally on the surface facing the body of the user 11 of the absorber 10, which they are coextensive with the path of the material-free zones 20. The absorbent core 14 preferably has a thickness between about 0.5 mm and about 20 mm. The depth of each chute 29 is in the range between about 0.5 mm and about 20 mm.
    [0023] [00023] Although this is not shown in the figures, the sanitary napkin 10b can be provided with a secondary absorbent core disposed between the main core 14 and the transfer layer 16, the secondary absorbent core including a plurality of material-free zones that correspond, in format and size, to the material-free areas of the main nucleus 14.
    [0024] [00024] Although this is not shown in the Figures, the areas of the absorbent in which the tracks 29 are located can be colored with a different color than that of the rest of the absorbent article. For example, the areas in which the gutters 29 are located can be colored blue, while the rest of the pad is generally white. When the channels 29 are colored in a different color than the rest of the absorbent, the optimized characteristics of capillary absorption offered by the channels 29 are visually communicated to a potential user of the absorbent article. The color can be imparted to the absorbent by applying a color (e.g., paint) to the cover layer 12, and / or the transfer layer 16, and / or the barrier layer 18.
    [0025] [00025] Reference is made to Figures 11 to 13, showing a sanitary napkin 10c according to a fourth embodiment of the present invention. The sanitary napkin 10c has a similar structure to that of the sanitary napkin 10 described above. However, in the embodiment of the invention shown in Figures 11a 13, the transfer layer 16 is provided with a planar portion 42 having an upper surface 44 and a lower surface 46 and a protrusion 48 extending upwardly from the upper surface 44 , as can be seen better in Figure 12. In the specific embodiment of the invention shown in Figures 11 to 13, the protuberance 48 is structured and positioned to align with the material-free zone 20 of the absorbent core 14. More specifically, as seen in 13, the protuberance 48 is structured and positioned to be received in, and extend upwards and into, the material-free zone 20 of the absorbent core 14.
    [0026] [00026] In the specific embodiment of the invention shown in Figures 11 to 13, the protuberance 48 is generally elliptical and preferably has a length, measured along the longitudinally extending center line 15, in the range of about 40 mm to about 160 mm and a width, measured along the central line extending transversely 17, from about 10 mm to about 60 mm. The protuberance 48 preferably extends over a surface area in the range of about 400 mm2 to about 6,000 mm2.
    [0027] [00027] The protuberance 48 preferably has a height greater than the distance between the upper surface 19 of the absorbent core and the lower surface 21 of the absorbent core. Preferably, the height of the protuberance 48 is in the range of about 0.5 mm to about 50 mm, more preferably in the range of about 2.0 mm to 35 mm and most preferably in the range of about 2 , 5 mm to 30 mm. The term "hump height" for use in the present invention means the distance at which hump 48 extends above the upper surface 44 of the planar portion 42. Since hump 48 has a height greater than the distance between the upper surface 19 of the absorbent core and the lower surface 21 of the absorbent core, the protuberance 48 defines a raised area 31 extending upwardly from the planar portion 33 of the absorbent 10c, as best seen in Figure 11. As shown in Figure 11, the raised area 31 has a geometry of the same shape as the protuberance 48.
    [0028] [00028] The planar portion 42 and the protrusion 48 of the transfer layer 16 can be formed by any conventional method known to those skilled in the art. For example, transfer layer 16 can be compacted in the area defining planar portion 42 and not compacted in the area defining protuberance 48.
    [0029] [00029] Reference is made to figures 14 to 16, showing a sanitary napkin 10d according to a fifth embodiment of the present invention. The sanitary napkin 10d has a similar structure to the sanitary napkin 10b described above. However, in the embodiment of the invention shown in figures 14 to 16, the transfer layer 16 is provided with a planar portion 42 which has an upper surface 44 and a lower surface 46 and a plurality of protrusions 48 extending upwards from the upper surface 44, as best seen in Figure 15. In the specific embodiment of the invention shown in Figures 14 to 16, each protuberance 48 is structured and positioned to align with one of a plurality of material-free zones 20 in the absorbent core 14. More specifically, as seen in Figure 16, each protuberance 48 is structured and positioned to be received in, and extend upwards and inwards, one of the material-free zones 20 of the absorbent core 14.
    [0030] [00030] In the specific embodiment of the invention shown in the figures. 14 to 16, each protuberance 48 has a width in the range of about 1 mm to about 10 mm and a length in the range of about 50 mm to 250 mm. Absorbent articles according to this embodiment of the invention preferably have from about 2 to about 7 protrusions 48 extending longitudinally. Each protrusion 48 is spaced from the adjacent protrusion by a distance of about 5 mm to about 30 mm. Each protuberance 48 preferably extends over a surface area in the range of about 50 mm2 to about 4,000 mm2. In the specific embodiment of the invention shown in figures 14 to 16, the protrusions 48 have a linear shape, being parallel to each other and equally spaced.
    [0031] [00031] Preferably, each protuberance 48 has a height greater than the distance between the upper surface 19 of the absorbent core and the lower surface 21 of the absorbent core. Preferably, the height of each protuberance 48 is in the range of about 0.5 mm to about 50 mm, more preferably in the range of about 2.0 mm to 35 mm and most preferably in the range of about 2.5 mm to 30 mm. The term "hump height" for use in the present invention means the distance at which the hump extends above the upper surface 44 of the planar portion 42. Since each hump 48 has a height greater than the distance between the upper surface 19 of the absorbent core and the bottom surface 21 of the absorbent core, the protrusions 48 define a plurality of raised areas 31 extending upwardly from the planar portion 33 of the absorbent 10d, as best seen in Figure 14. As shown in 14, each of the raised areas 31 has a geometry equal to that of the corresponding protuberance 48.
    [0032] [00032] The planar portion 42 and each of the protrusions 48 can be formed by any conventional method known to those skilled in the art. For example, transfer layer 16 can be compacted in the area defining planar portion 42 and not compacted in areas defining protuberances 48. Cover layer
    [0033] [00033] The cover layer 12 can be a relatively low density, bulky and highly aerated nonwoven blanket material. The cover layer 12 can be composed of only one type of fiber, such as polyester or polypropylene, or it can include a mixture of more than one fiber. The cover can be composed of two-component 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 12 has a base weight in the range of about 10 g / m2 to about 75 g / m2.
    [0034] [00034] Two-component fibers can be made of a polyester layer and a polyethylene sheath. The use of suitable two-component materials results in a fusible 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 fabric increases the ease with which the cover layer can be fitted to the absorbent layers of the article and / or the barrier layer.
    [0035] [00035] The covering layer 12 preferably has a relatively high degree of wettability, despite the fact that individual fibers comprising the covering 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 12 is designed to absorb bodily 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).
    [0036] [00036] Advantageously, the fibers that form the covering layer 12 should not lose their physical properties when moistened; in other words, they must not fall apart or lose their resilience when subjected to water or body fluid. The cover layer 12 can be treated to allow fluid to pass through it readily. The cover layer 12 also works to transfer the fluid quickly to the underlying layers of the absorbent. In this way, the cover layer 12 is advantageously wetted, hydrophilic and porous. When composed of hydrophobic synthetic fibers such as polyester fibers or bi-components, the cover layer 12 can be treated with a surfactant to provide the desired degree of wettability.
    [0037] [00037] Alternatively, the covering layer 12 can also be produced from a polymer film with large pores. Due to this high porosity, the film performs the function of quickly transferring the body fluid to the underlying absorbent layers.
    [0038] [00038] The cover layer 12 can be attached to the underlying absorbent core 14, transfer layer 16 and / or barrier layer 18, by adhesion and / or other suitable means known to those skilled in the art. Absorbent core
    [0039] [00039] In one embodiment, the absorbent core 14 is a blend or mixture of cellulosic and superabsorbent fibers arranged in its interior. Cellulosic fibers that can be used in the absorbent core 14 are well known in the art and include wood pulp, cotton, linen and peat moss. Wood pulp is preferred. Pulps can be obtained by mechanical or chemomechanical processes, from sulphite, brown paper, pulp rejected materials, organic solvent pulp, 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 product flexibility. The flexibility of the material can also be improved by mechanically working the material or softening the material.
    [0040] [00040] The absorbent core 14 can contain any superabsorbent polymers (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 body fluids, under a pressure of 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. The preferred superabsorbent polymer particles for use in the present invention are cross-linked polyacrylates, like 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 one example Specifically, the absorbent core is a material containing from 95% to about 40% by weight of cellulosic fibers and from about 5% to about 60% by weight of SAP.
    [0041] [00041] In a specific embodiment of the invention, the absorbent core 14 is constructed from a mixture of cellulose pulp type "fluff1, commercially available under the name RAYFLOC J-LD-E from Rayonier Products of Jessup, Georgia, USA, and a superabsorbent polymer available commercially under the name SA70N from Sumitomo Seika Chemicals Co., Ltd. of Osaka, Japan, the mixture comprising 94% by weight of fluff cellulose pulp and 6% by weight of superabsorbent polymer.
    [0042] [00042] Materials particularly suitable for use as an absorbent core preferably have a base weight in the range of about 300 g / m2 to 1000 g / m2, a thickness in the range of about 0.5 mm to 20 mm , and a density in the range of about 0.015 g / c3 to 2 g / c3. Transfer layer
    [0043] [00043] In a position adjacent to the barrier layer 18 on its inner side is the transfer layer 16. The transfer layer provides the means for receiving body fluid from the covering layer 12 and for retaining body fluid until the absorbent core 14 has the opportunity to absorb the fluid and therefore serves as a transfer or fluid acquisition layer. In addition, the transfer layer 16 works to absorb the fluid by capillary effect, in the longitudinal and transverse directions of the absorbent, so that all the absorbent capacity of the absorbent is used.
    [0044] [00044] Transfer layer 16 preferably has a larger proportion of smaller pores than cover layer 12. These attributes allow transfer layer 16 to contain body fluid and retain it away from the outer side of the layer covering layer 12, thus preventing the fluid from wetting the covering layer 12 and its surface again.
    [0045] [00045] The transfer layer 16 can be composed of fibrous materials, such as wood pulp, polyester, rayon, flexible foam or the like, or combinations thereof. Preferably, transfer layer 16 is free of any superabsorbent polymer (SAP). The transfer layer 16 can also comprise thermoplastic fibers for the purpose of stabilizing the layer and maintaining its structural integrity. The transfer layer 16 can be treated with a surfactant on one or both sides, in order to increase its wettability, although generally the transfer layer 16 is relatively hydrophilic and may not require treatment. The transfer layer 16 is preferably joined on both sides to the adjacent layers, i.e., the cover layer 14 and the barrier layer 18. Barrier layer
    [0046] [00046] In a position underlying the transfer layer 16 is a barrier layer 18 comprising liquid-impermeable film material, which prevents the liquid from leaving the sanitary napkin and staining the user's underwear. The barrier layer 18 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 non-woven fabrics or foam films or foams. micropore.
    [0047] [00047] The barrier layer 18 can be breathable, that is, it can allow the passage of steam. 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, fabrics, 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 12 and the barrier layer 18 are preferably joined along their marginal portions, so as to form a closure or flange seal that holds the transfer layer 16 and the absorbent core 14 attached. it can be done by means of adhesives, hot bonding, ultrasound bonding, radio frequency sealing, mechanical crimping, and the like, and combinations thereof.
    [0048] [00048] A positioning adhesive can be applied to the surface facing the garment 13 of the barrier layer 18, to bond the absorbent 10 to a garment during use. As seen in figure 2, the adhesive for positioning can be covered with removable protective paper 40, so that the adhesive for positioning is covered by it before use.
    [0049] [00049] The absorbent articles of this invention may or may not include wings, flaps or ears for attaching the absorbent article to underwear. Wings, also called, among other things, flaps, and their use in health protection articles, are described in US patent no. 4,687,478 granted to Van Tilburg; U.S. Patent No. 4,589,876 also to Van Tilburg, U.S. Patent No. 4,900,320 to McCoy, and U.S. 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.
    权利要求:
    Claims (15)
    [0001]
    Absorbent article, characterized by the fact that it comprises: a central line that extends longitudinally, a central line that extends across, a liquid-permeable covering layer which has a surface facing the user's body, a liquid-impermeable barrier layer, an absorbent core disposed adjacent to the cover layer, the absorbent core including an upper surface and a lower surface and at least one material-free zone extending from the upper surface to the lower surface; a transfer layer disposed between the core and barrier layers, the transfer layer including a planar portion having an upper surface and a lower surface and at least one protuberance extending upwardly from the upper surface; wherein the cover layer includes at least a first region arranged in a spaced relationship with the transfer layer and at least a second region arranged in surface-to-surface contact with the transfer layer; wherein at least one protuberance is structured and positioned to be received in, and extend upwards and within at least one material-free zone; and wherein at least one protuberance is greater than the distance between the upper surface of the absorbent core and the lower surface of the absorbent core.
    [0002]
    Absorbent article, according to claim 1, characterized by the fact that it comprises: a central line that extends longitudinally, a central line that extends across, a liquid-permeable covering layer which has a surface facing the user's body, a liquid-impermeable barrier layer, an absorbent core disposed adjacent to the cover layer, the absorbent core including an upper surface and a lower surface and a material-free zone extending from the upper surface to the lower surface; a transfer layer disposed between the core and barrier layers, the transfer layer including a planar portion having an upper surface and a lower surface and a protuberance extending upwardly from the upper surface; wherein the cover layer includes a first region disposed in a spaced relationship with the transfer layer and a second region disposed in surface-to-surface contact with the transfer layer; wherein the protuberance is structured and positioned to be received in, and extend upward and within the material-free zone; and wherein the protrusion has a height greater than the distance between the upper surface of the absorbent core and the lower surface of the absorbent core.
    [0003]
    Absorbent article, according to claim 2, characterized by the fact that the material-free zone is centrally aligned in relation to the longitudinally extending central line and the transversely extending central line.
    [0004]
    Absorbent article according to claim 2 or 3, characterized by the fact that the material-free zone extends over an area between 400 mm2 and 6,000 mm2.
    [0005]
    Absorbent article according to any of claims 2 to 4, characterized by the fact that the material-free zone is elliptical in shape and has a length, measured along the longitudinally extending center line, in the range of 40 mm to 250 mm mm, and a width, measured along the central line extending transversely, from 10 mm to 60 mm.
    [0006]
    Absorbent article according to any one of claims 2 to 5, characterized in that the protrusion extends over an area of 400 mm2 and 6,000 mm2.
    [0007]
    Absorbent article, according to claim 1, characterized by the fact that it comprises: a central line that extends longitudinally, a central line that extends across, a liquid-permeable covering layer with a surface facing the user's body, a liquid-impermeable barrier layer, an absorbent core disposed adjacent to the cover layer, a transfer layer disposed between the core and the barrier bed, the transfer layer includes a planar portion having an upper surface and a lower surface and a plurality of protuberances extending upwardly from the upper surface; wherein the absorbent core includes an upper surface and a lower surface, the absorbent core comprises a plurality of beams and a plurality of material-free zones, each of the beams being arranged in a spacing relationship with an adjacent beam and each one of the beams is separated from an adjacent beam by a material-free zone, and each of the material-free zones extends from the upper surface to the lower surface, wherein the cover layer includes a plurality of first regions arranged in a spaced relation with the transfer layer and a plurality of second regions, each of the second regions being situated between two adjacent beams and arranged in a surface contact a surface with the transfer layer; wherein each of the plurality of protuberances is structured and arranged to be received in, and to extend upward and inward, one of the plurality of material-free zones; and each protuberance having a height greater than the distance between the upper surface of the absorbent core and the lower surface of the absorbent core.
    [0008]
    Absorbent article according to claim 7, characterized by the fact that each of the material-free zones has a width in the range of 1 mm to 10 mm, and a length in the range of 40 mm to 250 mm.
    [0009]
    Absorbent article according to claim 7 or 8, characterized in that the absorbent article includes between 2 and 7 material-free zones extending longitudinally, and in which each material-free zone is spaced in relation to a area free of adjacent material in the transverse direction for a distance of 5 mm to 30 mm.
    [0010]
    Absorbent article according to any one of claims 7 to 9, characterized by the fact that each of the material-free zones extends over a surface area in the range of 50 mm2 to 4,000 mm2.
    [0011]
    Absorbent article according to any one of claims 7 to 10, characterized in that each protuberance has a width in the range of 1 mm to 10 mm, and a length in the range of 40 mm to 250 mm.
    [0012]
    Absorbent article according to any one of claims 7 to 11, characterized in that the absorbent article includes between 2 and 7 protuberances, each protuberance being spaced in relation to an adjacent protuberance in the transverse direction by a distance of 5 mm to 30 mm.
    [0013]
    Absorbent article according to any one of claims 7 to 12, characterized by the fact that each of the protrusions extends over a surface area in the range of 50 mm2 to 4,000 mm2.
    [0014]
    Absorbent article according to any one of the preceding claims, characterized by the fact that each protuberance has a height in the range of 0.5 mm to 50 mm.
    [0015]
    Absorbent article according to any one of the preceding claims, characterized by the fact that each protuberance has a height in the range of 1.0 mm to 35 mm, or each protuberance has a height in the range of 1.5 mm to 30 mm.
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    同族专利:
    公开号 | 公开日
    CN102008375B|2015-10-14|
    CA2712563A1|2011-03-04|
    BRPI1003597A2|2012-05-29|
    ZA201006344B|2012-08-29|
    KR20110025619A|2011-03-10|
    AU2010219291B2|2015-11-05|
    ZA201209550B|2014-12-23|
    US20140249497A1|2014-09-04|
    US20120323202A1|2012-12-20|
    EP2298258A1|2011-03-23|
    BR102012031875A2|2015-01-20|
    BR102012031875B1|2020-08-04|
    PH12010000232A1|2016-04-04|
    US8952212B2|2015-02-10|
    CN102008375A|2011-04-13|
    BR102012031905A2|2015-01-20|
    US20110060303A1|2011-03-10|
    AU2015238926A1|2015-10-29|
    CO6380004A1|2012-02-15|
    US8764719B2|2014-07-01|
    US20120323201A1|2012-12-20|
    HK1184672A1|2014-01-30|
    US8858522B2|2014-10-14|
    US8859841B2|2014-10-14|
    AR078265A1|2011-10-26|
    BRPI1003597B1|2019-10-15|
    AU2010219291A1|2011-03-24|
    MX2010009725A|2011-03-17|
    RU2010136918A|2012-03-10|
    US20130178813A1|2013-07-11|
    PH12010000232B1|2016-04-04|
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    法律状态:
    2015-01-20| B03A| Publication of an application: publication of a patent application or of a certificate of addition of invention|
    2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-10-01| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2020-06-30| B09A| Decision: intention to grant|
    2020-11-24| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 14/12/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US12/554,047|US8764719B2|2009-09-04|2009-09-04|Absorbent article including an absorbent core layer having a material free zone and a transfer layer arranged below the absorbent core layer|
    US13/326,725|2011-12-15|
    US13/326,725|US8952212B2|2009-09-04|2011-12-15|Absorbent article including an absorbent core layer having a material free zone and a transfer layer arranged below the absorbent core layer|
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