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Highly resilient, dimensionally recoverable nonwoven material

A non-woven fiber web, elastic technology, applied in the direction of non-woven fabrics, synthetic cellulose/non-cellulose material pulp/paper, textiles and paper making, etc., can solve the problems of limiting non-woven fiber webs, etc.

Inactive Publication Date: 2008-09-03
AHLSTROM MUNKSJO OYJ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This surface deterioration also limits the usefulness of wet-laid nonwoven webs

Method used

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  • Highly resilient, dimensionally recoverable nonwoven material
  • Highly resilient, dimensionally recoverable nonwoven material
  • Highly resilient, dimensionally recoverable nonwoven material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] This example shows the effect of microcreping (according to Specification C2715 method) on product appearance, shrinkage and tensile recovery. Therefore, a wet-laid nonwoven fabric was prepared from a fiber slurry consisting of the following components: 40% 1.5 denier × 0.5 inch T-103 type polyester fiber; 20% 15.0 denier × 0.75 inch T- Type 103 polyester; 10% Aracruz eucalyptus pulp and 30% Irving softwood pulp. After preparation, the resulting nonwoven web was treated with an acrylic binder (TR407 from Rohm & Haas) such that the binder content was about 24% of the final total weight. After treatment with binder the material was dried and collected. The total material basis weight is 88.5 grams per square centimeter (g / m 2 ) and labeled as sample 100. Sample material 100-M for passing Sample 100 material after processing of Corporation Microcrease Specification C2715. Representative data for the resulting wetlaid nonwovens and their microcrepes are summarized in ...

Embodiment 2

[0078] In this example, two standard wet-laid nonwoven fabrics were prepared by papermaking according to Example 1. The first prototype was prepared using the following fiber composition: 30% 1.5 denier x 0.5 inch T-103 type polyester; 30% 1.5 denier x 0.25 inch T-103 type polyester; 10% Aracruz eucalyptus pulp and 30% Irving Cork pulp. After forming, the resulting nonwoven web was treated with an acrylic binder (TR407 from Rohm & Haas) so that the binder content reached the final total weight (set at 37 g / m 2 ) of about 18%. However, microcreping the nonwoven web yielded 49 g / m 2 The final product was marked 101-M. A second standard wet-laid nonwoven was prepared using the following fiber composition: 30% 1.5 denier by 0.5 inch T-103 type polyester fiber; 30% 15.0 denier by 0.75 inch T-103 type polyester fiber; 10% Aracruz Eucalyptus pulp and 30% Irving softwood pulp. After forming, the resulting nonwoven web was treated with an acrylic binder (E32NP from Rohm & Haas) so...

Embodiment 3

[0082] In this example, two identical nonwoven webs from Example 2, microcreped according to Specification C2715 with or without heatsetting, were washed and dried for 3 wash and dry cycles to determine their appearance and shrinkage properties. The samples were also hot air dried once to determine their heat shrinkage. Table 3 illustrates the shrinkage, appearance and stretch recovery results for 10 stretch cycles at 5% elongation.

[0083]

[0084] * These samples actually expand in length rather than contract.

[0085] The data indicate that heat setting during microcreping is also beneficial in providing dimensional stability of the samples after washing and drying cycles. The samples that were not heat set also showed a surface roughening or "crocodile" pattern on the surface after the wash and dry cycle. The samples that were heat set showed no surface roughening or "crocodile" pattern on the surface.

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Abstract

The present invention provides a microcreped wet laid nonwoven with recoverable stretch suitable for apparel applications such as waistbands and interlinings. The microcreping and heat setting improves dimensional stability after washing and drying cycles, minimizes shrinkage and substantially eliminates the surface wrinkling phenomenon, known in the industry as ''alligatoring'', associated with wet laid and other apparel nonwovens.

Description

Background of the invention [0001] Wet laid nonwoven fabrics have been widely used in apparel applications as various interlinings and interliners. Wet laid nonwoven fabrics provide more dimensional stability and uniformity in all directions than other types of nonwoven fabrics such as carded webs. However, wet-laid nonwoven fabrics have only very limited stretchability, typically about 10%-15% in MD (machine direction) and 20% in CD (cross direction) before breaking. The tensile properties of wet-laid nonwoven fabrics result from fiber separation and binder deformation, if present. The stretch properties of wet-laid nonwovens are inelastic, so a wet-laid nonwoven stretched 10% (stretched to 110% of its original length) will remain at 110% length after the tension is removed. The use of wet-laid nonwovens has therefore been limited in certain applications, such as trouser waists, which require a certain amount of elasticity or recoverable stretch properties in their machine ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D03D17/00
CPCY10T442/602Y10T428/24322D21H11/12D21H13/24D21H25/005D04H1/4258D04H1/4334D04H1/425D04H1/542
Inventor L·L·金R·B·弗雷拉C·J·哈利R·A·德阿马托
Owner AHLSTROM MUNKSJO OYJ
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