Body fluid absorbent article
First Claim
1. A body fluid absorbent article comprising a layered composite that includes(A) a topsheet (4) consisting of a thickness of hydrophobic film having an upper surface and a lower surface which between them define the thickness of the material forming the topsheet (4), said topsheet (4) comprising (a) a first portion which is generally planar and (b) a second portion which comprises a plurality of tubular passageways (5) located at spaced apart points in said first portion and which extend downwardly from said planar portion a distance which is greater than the thickness of said topsheet (4), the walls of said tubular passageways (5) being composed of portions of said topsheet that have been deformed downwardly in relation to said planar portion, the lower end of each tubular passageway (5) having a ragged edge contour,(B) a meshy sheet (3) composed of hydrophobic plastic film having an upper surface and a lower surface, said film having been treated with a surfactant to make it hydrophilic, said meshy sheet (3) being split into a plurality of spaced apart fibers (6) that define between them a plurality of mesh openings that are smaller than the openings in the lower ends of each tubular passageway (5), the upper surface of said meshy sheet (3) being bonded integrally to the lower ends of each tubular passageway (5) so that said fibers (6) will extend across the lower ends of said tubular passageways (5) to thereby divide each of said lower openings into a plurality of smaller openings, and(C) an absorbent core (1) having an upper surface and a lower surface, said upper surface being covered by the lower surface of said meshy sheet (3).
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Accused Products
Abstract
A body fluid absorbent article comprising a topsheet formed with tubular liquid passages extending from the bottom surface of the topsheet and an absorbent core, wherein a meshy sheet comprising fibres defining meshes smaller than lower openings of the respective liquid passages is interposed between said topsheet and said absorbent core so that said fibres extend across the lower openings (FIG. 3).
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Citations
1 Claim
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1. A body fluid absorbent article comprising a layered composite that includes
(A) a topsheet (4) consisting of a thickness of hydrophobic film having an upper surface and a lower surface which between them define the thickness of the material forming the topsheet (4), said topsheet (4) comprising (a) a first portion which is generally planar and (b) a second portion which comprises a plurality of tubular passageways (5) located at spaced apart points in said first portion and which extend downwardly from said planar portion a distance which is greater than the thickness of said topsheet (4), the walls of said tubular passageways (5) being composed of portions of said topsheet that have been deformed downwardly in relation to said planar portion, the lower end of each tubular passageway (5) having a ragged edge contour, (B) a meshy sheet (3) composed of hydrophobic plastic film having an upper surface and a lower surface, said film having been treated with a surfactant to make it hydrophilic, said meshy sheet (3) being split into a plurality of spaced apart fibers (6) that define between them a plurality of mesh openings that are smaller than the openings in the lower ends of each tubular passageway (5), the upper surface of said meshy sheet (3) being bonded integrally to the lower ends of each tubular passageway (5) so that said fibers (6) will extend across the lower ends of said tubular passageways (5) to thereby divide each of said lower openings into a plurality of smaller openings, and (C) an absorbent core (1) having an upper surface and a lower surface, said upper surface being covered by the lower surface of said meshy sheet (3).
Specification
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- Resources
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Current AssigneeUnicharm Corporation
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Original AssigneeUnicharm Corporation
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InventorsMurakami, Masaki, Mizutani, Satoshi, Yamamoto, Masamitsu
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Primary Examiner(s)Green, Randall L.
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Assistant Examiner(s)ZUTTARELLI, ANTHONY
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Application NumberUS08/166,089Time in Patent Office421 DaysField of Search604/358, 604/378-385.1, 604/366, 604/370, 428/134, 428/136, 428/137, 428/161US Class Current604/384CPC Class CodesA61F 13/512 characterised by its apertu...A61F 13/51305 having areas of different p...A61F 2013/15406 Basis weightA61F 2013/51026 being in thermoplastic mate...A61F 2013/5103 being hydrophobicA61F 2013/51066 for rendering the surface h...A61F 2013/51409 being a filmA61F 2013/51441 being a fibrous materialA61F 2013/53908 with adhesiveA61F 2013/5395 with thermoplastic agent, i...
