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Breathable laminate permanently conformable to the contours of a wearer

A technology for laminates and wearers, which can be used in layered products, pharmaceutical devices, synthetic resin layered products, etc., and can solve problems such as skin pressure and discomfort

Inactive Publication Date: 2005-12-14
KIMBERLY-CLARK WORLDWIDE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Potential energy stored in the stretched area of ​​the garment causes a retractive force against the wearer's body, causing skin compression and discomfort

Method used

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  • Breathable laminate permanently conformable to the contours of a wearer
  • Breathable laminate permanently conformable to the contours of a wearer
  • Breathable laminate permanently conformable to the contours of a wearer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0178] Several laminates were prepared using three layer A-B-A cast film supplied under the trade designation Huntsman Model 1885 by Huntsman Packaging Company (199 Edison Drive, Washington, Georgia 30763). The core layer of the film comprised 42 wt% linear low density polyethylene and 58 wt% calcium carbonate filler. The film had two skin layers and comprised a mixture comprising: a heterophasic combination of ethylene-vinyl acetate (28% vinyl acetate content), and a propylene-ethylene copolymer called Montell KS-037Pcataloy. The cortex accounts for approximately 3% of the total film thickness.

[0179] The film is stretched longitudinally to 3.8 to 4.0 times its original length, thereby producing a WVTR exceeding 2000g / m 2 ·24h breathable microporous film. The breathable film has a basis weight of 19 g / m 2 .

[0180] In the first set of examples (using low-neck spunbond webs), a breathable film of 3 g / m 2 Findley H2525A adhesive, manufactured by Ato Findley (Milwaukee, ...

example 1 and 2

[0188] Examples 1 and 2 (first group)

[0189] Table 1

[0190] As shown above, laminates made using breathable microporous films and low neck-in stretch spunbond materials can be stretched in the cross direction by 25% or 50% of their original width without breaking. After holding the stretched width for 1 min, the laminates in both cases retracted less than 30% of the difference between the stretched width and the original unstretched width.

example 3～6

[0191] Examples 3-6 (second group)

[0192] Table 2

[0193] As shown above, laminates prepared using breathable microporous films and highly necked stretched spunbond webs can be stretched 50%, 100%, 150%, or 200% in the cross direction without breaking. After being held at the stretched width for 1 min, the laminates in all cases retracted less than 30% of the difference between the stretched width and the original unstretched width.

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Abstract

A breathable, substantially liquid-impermeable laminate is provided that permanently conforms to the contours of the wearer's body when used in a personal care absorbent or medical article. The laminate comprises a breathable (preferably microporous) film and a fibrous nonwoven web. When a stretching force is applied, both the film and the web can elongate in the cross direction to a width at least 25% greater than their original unstretched width. Webs and films, and overall laminates, once elongated, exhibit little or no retractive forces. Diapers or other garments can be styled in small sizes using this laminate, saving material. When the garment is worn, the laminate stretches only where needed to provide a substantially perfect fit to the wearer. The minimal retraction force avoids the problems that elastic garments can cause such as skin strangulation and rashes.

Description

technical field [0001] The present invention relates to a breathable laminate (ie, water vapor permeable but substantially liquid impermeable) that is permanently conformable to the contours of the wearer. The laminate can elongate as necessary to conform to the contours of the wearer, and remains substantially in its elongated or stretched state even after the stretching force is released. Background technique [0002] Laminates that are water vapor permeable but substantially liquid water impermeable are known in the art and are commonly used in diaper backings, other personal care absorbent garments, medical garments, and the like. Such laminates can be constructed from breathable, stretch thinned filled films and spunbond webs. Breathable films can be made by blending one or more polyolefins with inorganic particulate fillers, forming a film from the mixture, and stretching the film to form voids around the filler particles. The resulting membrane can have a thin p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/12D04H13/00A61F13/15A41D13/00A41D31/00A41D31/02A61F13/00A61L15/22B32B5/04D04H3/16
CPCA61F13/514A61F13/5148A61F2013/51429B32B27/12B32B2555/02B32B2305/20B32B2262/02B32B2307/732B32B2535/00B32B2437/00B32B2307/7265
Inventor M·T·莫尔曼P·H·王A·T·奥诺H·M·韦尔奇C·J·莫雷尔S·-P·L·科尼尔D·G·乌伊藤布雷克
Owner KIMBERLY-CLARK WORLDWIDE INC
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