Apertured material for use in absorbent articles and method of making the same

Inactive Publication Date: 2004-08-19
TREDEGAR FILM PROD CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, once micro-texturing is completed, it is difficult to create the three-dimensional ("3D") funnel-shaped aperture that allows the fluid to pass through the film into the absorbent layer underneath without destroying the micro-texture.
Water or needle perforation has been attempted, however, the water approach is not at a high enough temperature t

Method used

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  • Apertured material for use in absorbent articles and method of making the same
  • Apertured material for use in absorbent articles and method of making the same
  • Apertured material for use in absorbent articles and method of making the same

Examples

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Effect test

example 7

[0037] Similar to Example 5, but with macro-apertures 18 with a spacing of about 11 apertures per square centimeter.

[0038] Example 8: Similar to Example 6, but with macro-apertures 18 with a spacing of about 11 apertures per square centimeter.

[0039] Strikethrough is a measure of the rate of absorption through a topsheet into an absorbent article and was conducted on finished articles as indicated below. In order to test strikethrough the original topsheet material is removed from the article and replaced with the topsheet material to be tested, except when testing the sample of the original material. The article is then insulted with a 10 ml sample of Menstrual Internal Synthetic Solution (MISS) and the strikethrough time is recorded using a Lister apparatus as described in EDANA Recommended Test Method ERT 150.5-02 Liquid Strike Through Time Test Method. Lower strikethrough numbers reflect a fast absorption and are desired in most absorbent articles.

[0040] Wetback is measured on t...

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Abstract

A film for use in absorbent articles is first microscopically textured and then macroscopically apertured while maintaining the microscopic texture. The micro-texturing may be done by a variety of means including vacuum forming, and may include micro-apertures. The macroscopic texture may be done by a variety of means including thermo-mechanical means with a heat shielding means. Where heated pins are used, the heat shielding means protects the micro-texture from the heat so that the heat does not deform the micro-texture.

Description

[0001] This application claims the benefit of U.S. Provisional Application No. 60 / 435,942, filed Dec. 20, 2002. The disclosure of the prior application is considered part of (and is incorporated by reference in) the disclosure of this application.[0002] This invention relates to the formation of three-dimensional thermoplastic films, and more particularly those with both micro-texture and macro-apertures.DESCRIPTION OF RELATED ART[0003] There has always been a need to create cloth-like textures in poly-olefin films that can in turn become three-dimensionally apertured fluid transporting structures. In the past this texturing was achieved through the creation of a plurality of micro-apertures that stick out from the surface of film. This fragile micro-texture can be created through the use of water forming or vacuum forming as described in the prior art. However, once micro-texturing is completed, it is difficult to create the three-dimensional ("3D") funnel-shaped aperture that allo...

Claims

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Application Information

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IPC IPC(8): A61F13/15B26F1/24B26F1/26B29C43/22B29C51/14B29C48/305B29C51/22B29C59/04B29C59/06B32B3/10B32B3/26B32B27/00B32B27/12B32B38/06
CPCA61F13/512Y10T156/1023A61F2013/15422A61F2013/51147A61F2013/53782B26F1/24B26F1/26B29C43/222B29C51/145B29C51/22B29C59/04B29C59/06B29C2059/023B29L2031/4878B32B3/10B32B3/26B32B27/00B32B27/12B32B38/06B32B2038/047B32B2305/20Y10T428/24273Y10T156/1056Y10T428/24322A61F13/537A61F13/51104A61F13/5123A61F13/15707A61F13/5122Y10T428/249921B32B2323/046B32B27/32B32B2555/02B32B2305/026B32B37/153
Inventor CREE, JAMES W.IULIANETTI, LINO
Owner TREDEGAR FILM PROD CORP
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