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Process for forming an elastic laminate comprising a crosslinked elastic film

A technology of laminates and elastic layers, applied in the field of elastic composite materials, can solve problems such as expensive materials

Inactive Publication Date: 2011-11-30
KIMBERLY-CLARK WORLDWIDE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared to styrenic block copolymers, Spandex TM and Lycra TM more expensive materials

Method used

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  • Process for forming an elastic laminate comprising a crosslinked elastic film
  • Process for forming an elastic laminate comprising a crosslinked elastic film
  • Process for forming an elastic laminate comprising a crosslinked elastic film

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[0079] The ability to form elastic composites from the first and second nonwoven facing layers and the crosslinked elastic film is demonstrated. The first nonwoven facing layer was an 18 grams per square meter (gsm) meltblown web comprising 100% by weight DNDA 1082 NT-7 (Dow Chemical). DNDA 1082 NT-7 is a linear low density polyethylene resin with a melt index of 155g / 10min (190°C, 2.16kg), 0.933g / cm 3density, and a melting point of 125°C. The meltblown web was formed on a forming belt using a 51 centimeter wide meltblown system with 12 capillaries per centimeter at an initial air temperature of 340°C and a die temperature of 250°C. The forming belt speed was set at 18 m / min and the polymer throughput was about 3.3 g / cm / min under metering pump control.

[0080] Next, the film skin is extruded onto the meltblown web and is applied to the meltblown web by suction and pinching while the film is still molten. 1″H 2 O to 15″H 2 A vacuum pressure of O is used to apply the sucti...

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Abstract

The present invention provides a method for forming an elastic composite material formed from a laminate comprising a crosslinked elastic film and a nonwoven facing layer.

Description

Background technique [0001] Elastic composites are generally incorporated into products (eg, diapers, training pants, clothing, etc.) to improve their ability to better conform to the contours of the body. For example, an elastic composite can be formed from an elastic film and a nonwoven facing. In the range of elastic materials currently available, there is a gap between intermediate performance and high performance elastic materials. For example, compared to Spandex with lower stress relaxation TM or Lycra TM Materials based on styrene SEBS polymers generally provide intermediate performance materials with relatively high stress relaxation compared to base materials. However, compared to styrenic block copolymers, Spandex TM and Lycra TM Materials are more expensive. Nonetheless, better elastic properties exhibited by expensive elastic materials are desirable. [0002] Thus, there currently exists a need for cost-effective elastic composites formed from lightweight a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H13/00B32B27/12B32B5/10
CPCB32B2307/51B32B2274/00A61F13/15593B32B25/16B32B38/1858B32B2310/08B32B2262/0253B32B5/022B32B2255/26B32B2310/0887B32B2305/20B32B37/144B32B25/10B32B37/153B32B2555/02B32B2260/023B32B2038/0076B32B2255/02A61F13/4902B32B5/08B32B27/08B32B27/12B32B27/16B32B27/20B32B27/302B32B27/32B32B27/34B32B27/36B32B27/40B32B2262/0223B32B2262/0276B32B2262/0292B32B2262/14B32B2307/718B32B2307/7246B32B2307/7265Y10T428/31938D04H13/00D04H1/42
Inventor O·P·托马斯J·A·V·D·斯奎拉
Owner KIMBERLY-CLARK WORLDWIDE INC