Disposable body fluids absorbent padding

• US 5,613,960 A
• Filed: 06/02/1995
• Issued: 03/25/1997
• Est. Priority Date: 06/03/1994
• Status: Expired due to Term

• Current Assignee: Unicharm Corporation
• Original Assignee: Unicharm Corporation
• Inventors: Mizutani, Satoshi
• Primary Examiner(s): Weiss, John G.
• Assistant Examiner(s): CUDDIHY, FRANCIS KEVIN
• Application Number:
  US08/459,998
• Time in Patent Office: 662 Days
• Field of Search: 604/358, 604/365, 604/366, 604/370, 604/372, 604/378, 604/379, 604/385.1, 604/380, 604/383
• US Class Current: 604/365
• CPC Class Codes: A61F 13/533 having discontinuous areas of compression
• CPC Class Codes: A61F 13/53747 the layer is facing the topsheet layer is part of the topsheet A61F13/511
• CPC Class Codes: A61F 2013/4587 with channels or deep spot depressions on the upper surface A61F13/4704 and A61F13/49001 take precedence
• CPC Class Codes: A61F 2013/51026 being in thermoplastic material
• CPC Class Codes: A61F 2013/5103 being hydrophobic
• CPC Class Codes: A61F 2013/5104 with pulp and polymeric fibres
• CPC Class Codes: A61F 2013/51042 with hydrophobic and hydrophilic fibres
• CPC Class Codes: A61F 2013/51066 for rendering the surface hydrophilic
• CPC Class Codes: A61F 2013/5108 in grids
• CPC Class Codes: A61F 2013/51165 with the combination of films and nonwovens
• CPC Class Codes: A61F 2013/51178 with the combination of nonwoven webs
• CPC Class Codes: A61F 2013/51182 with non-continuous bonding
• CPC Class Codes: A61F 2013/53778 with grooves
• CPC Class Codes: A61F 2013/5395 with thermoplastic agent, i.e. softened by heat

Abstract

A disposable body fluids absorbent padding is formed with a liquid-guiding fibrous sheet interposed between a liquid-permeable topsheet and a liquid-absorbent core. The fibrous sheet is intermittently fused to the topsheet in the direction of thickness as defined between the upper surface of the topsheet and the lower surface of the fibrous layer for improved fluid flow into the core.

Claims

1. A disposable body fluids absorbent padding comprising a liquid-permeable topsheet, a liquid-impermeable backsheet, a liquid-absorbent core disposed between said topsheet and backsheet and a liquid-guiding fibrous layer being more hydrophilic than said topsheet and interposed between said topsheet and said liquid-absorbent core to guide the body fluids from said topsheet into said core, wherein:

hot melt materials contained in both said topsheet and said liquid-guiding fibrous layer, respectively, are fused at a plurality of spots arranged intermittently in a plane of said topsheet whereby said topsheet and said liquid-guiding fibrous layer are integrally bonded together at said spots in a direction of thickness of said padding, said fused spots extending between an upper surface of said topsheet and a lower surface of said liquid-guiding fibrous layer.

2. A disposable body fluids absorbent padding according to claim 1, wherein said fused spots are arranged in a lattice pattern.

3. A disposable body fluids absorbent padding according to claim 1, wherein said plurality of intermittent fused spots form fused lines.

4. A disposable body fluids absorbent padding according to claim 1, wherein each of said fused spots is compressed to have a high density and to form a groove.

5. A disposable body fluids absorbent padding according to claim 1, wherein said topsheet and backsheet are bonded together along a seal line so that peripheral portions thereof extend outward beyond a peripheral edge of both the core and said seal line, and wherein said fused spots are also formed outwardly of the peripheral edge of the core to at least said seal line.

6. A disposable body fluids absorbent padding comprising a liquid-permeable topsheet, a liquid-impermeable backsheet, a liquid-absorbent core disposed between said topsheet and backsheet and a liquid-guiding fibrous layer being more hydrophilic than said topsheet and interposed between said topsheet and said liquid-absorbent core to guide the body fluids from said topsheet into said core, wherein:

hot melt materials contained in both said topsheet and said liquid guiding fibrous layer, respectively, are fused along fusing lines which in plan view form a lattice pattern, whereby said topsheet and said liquid guiding fibrous layer are integrally bonded together along said fusing lines in a direction of thickness of said padding, said fusing lines extending between an upper surface of said topsheet and a lower surface of said liquid guiding fibrous layer.