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EP0955159A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Method for forming apertured laminate web

Assignee: Procter and Gamble Co
•
Filing: 1998-04-28
•
Granted: —
•
Expires: 2018-04-28
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Abstract

Abstract A method for forming an apertured laminate web (40) formed from a first material (42) and second material (44) which may be used as a topsheet (24) on a disposable absorbent article, such as a diaper. The second material (44) preferably has a hydrophilicity which is greater than the hydrophilicity of the first material (42). The first and second materials (42,44) are fed through a nip (250) formed by a first pair of heated rollers one of the rollers (260) having a smooth outer surface and the other roller (254) having an outer surface with a plurality of projections extending from it's outer surface. The first pair of rollers bond the materials together to form a laminate web (40) and create a plurality of apertures having a fused perimeter. Cooling the laminate web (40) to solidify the fused perimeter of the apertures. Feeding the laminate through a nip (280) formed by a second pair of rollers to break the solidified fused perimeter of the apertures.

Inventors

  • 👤 Andreas Flohr
  • 👤 Michael Divo
  • 👤 Ludwig Busam
  • 👤 Ralph Keck

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-05 02:12
CPC Classifications
B; B32; B32B; B32B37/00; B32B37/14; B32B37/16; B32B37/20; A; A61; A61F; A61F13/00; A61F13/15; A61F13/15577; A61F13/15707; A61F13/15731

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 149 words
A method of forming a laminate web comprising a liquid pervious first material and a liquid pervious second material, said method comprising the steps of: a) feeding a first material through a nip formed by a first pair of heated rollers one of said rollers having a smooth outer surface and the other roller having an outer surface with a plurality of projections extending from said outer surface, b) feeding a second material through said nip formed by the pair of rollers described in a), such that said first and second materials are apertured with a plurality of apertures and bonded together to form a laminate, said apertures having a fused perimeter; c) cooling said laminate web to solidify said fused perimeter of said apertures; and d) feeding said laminate through a nip formed by a second pair of rollers to break said solidified fused perimeter of said apertures.
Claim 2
Dependent Claim 22 words
The method of claim 1 wherein said second material having a hydrophilicity which is greater than the hydrophilicity of said first material
Claim 3
Dependent Claim 19 words
The method of either claim 1 or claim 2 wherein said first pair of rollers have the same velocity.
Claim 4
Independent Claim 19 words
The method of any one of the preceding claims wherein the second pair of rollers have the same velocity.
Claim 5
Independent Claim 23 words
The method of any one of the preceding claims wherein the laminate web is cooled by blowing cool air onto the laminate web.
Claim 6
Independent Claim 21 words
The method of any one of the preceding claims wherein said second pair of rollers each have a smooth outer surface.
Claim 7
Independent Claim 33 words
The method of any one of the preceding claims wherein the peripheral linear speed of the second pair of rollers is greater than the peripheral linear speed of the first pair of rollers.
Claim 8
Independent Claim 18 words
The method of any one of the preceding claims wherein said first and second materials comprise nonwoven webs.
Claim 9
Independent Claim 23 words
The method of any one of the preceding claims wherein said second material has a width greater than that of said first material.
Claim 10
Independent Claim 38 words
The method of any one of the preceding claims wherein said first material and/or said second material is slit into multiple strips prior to being fed through said nip formed by the pair of rollers described in a).

References Cited (Backward Citations)

JPS61199929A Cited
JPS62109621A Cited
US4758297A Cited
EP0598970A1 Cited
EP0687757A2 Cited
US5554246A Cited
WO1997011662A1 Cited

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