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Elastomeric multicomponent fibers, nonwoven webs and nonwoven fabrics

a multi-component fiber and nonwoven fabric technology, applied in the field of nonwoven fabrics, can solve the problems of requiring a significant amount of space within the manufacturing facility, drawing rolls can impart non-uniform stretching, and tenter frames are expensiv

Inactive Publication Date: 2006-04-20
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about a method for producing elastic nonwoven fabrics and elastic nonwoven fabrics made from multicomponent strands. The method involves melt spinning a plurality of multicomponent strands, which are then bonded or intertwined to form the nonwoven fabric. The fabric is then stretched in at least one direction to activate its elastic properties. The resulting fabric has a corrugated appearance and texture, with individual strands lengthy and infinite in length. The fabric can be used for a variety of applications, such as in elastic nonwoven fabrics and elastic nonwoven fibers. The technical effects of the invention include improved elastic properties, durability, and flexibility of the nonwoven fabric.

Problems solved by technology

Unfortunately, draw rolls can impart non-uniform stretching when used in conjunction with elastomeric fabrics.
Tenter frames are expensive and require a significant amount of space within manufacturing facilities.

Method used

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  • Elastomeric multicomponent fibers, nonwoven webs and nonwoven fabrics
  • Elastomeric multicomponent fibers, nonwoven webs and nonwoven fabrics
  • Elastomeric multicomponent fibers, nonwoven webs and nonwoven fabrics

Examples

Experimental program
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Effect test

example 1

[0109] A web of 10 / 90 sheath / core bicomponent filaments was prepared on a spunbond apparatus similar to that described in FIG. 4. The core was prepared from PELLETHANE2103-70A polyurethane and the sheath was prepared from Dow ASPUN 6811A polyethylene. The filaments were spun through a die having 144 holes of 0.35 mm diameter. The filaments were drawn at a speed of approximately 600 m / min through an air attenuation device and distributed on a foraminous belt as a web of 68 gsm basis weight. The denier of the filaments was approximately 5. The web was thermally point bonded at a temperature of 111° C. and passed through mechanical incremental stretching devices so that it was stretched in both the machine direction and the cross machine direction. The mechanical properties of the fabric are given in Table 1.

example 2

[0110] A web of 9 / 91 sheath / core bicomponent filaments was prepared in the apparatus used for Example 1. The core was prepared from PELLETHANE2102-75A polyurethane and the sheath was prepared from Arco 40-7956X polypropylene. The web was thermal point bonded at 136° C. and mechanically incrementally stretched in both the machine direction and the cross machine direction. The mechanical properties of this fabric are given in Table 1.

example 3

[0111] A web of 10 / 90 sheath / core bicomponent filaments was prepared on an apparatus similar to that described in FIG. 4. The core was prepared from PELLETHANE2102-75A polyurethane and the sheath was prepared from Arco 40-7956X polypropylene. The filaments were spun through a die having 4000 holes of 0.35 mm diameter across a width of 1.2 meters. The filaments were drawn at a speed of approximately 1200 m / min through an air attenuation device and distributed on a foraminous belt to form a web of 50 gsm basis weight. The denier of the filaments was approximately 5. The web was thermal point bonded at a temperature of 138° C. and mechanically incrementally stretched in both the machine and cross machine direction. The mechanical properties of this fabric are given in Table 1.

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Abstract

A bonded web of multi-component strands that include a first polymeric component and a second polymeric component is capable of overcoming a number of problems associated with nonwoven webs including both stickiness and blocking. The first polymeric component and second polymeric component are arranged in substantially distinct zones extending longitudinally along at least a portion of a length of the strands which make up the web with the second component containing a zone constituting at least a portion of the peripheral surface of the strand. The first polymeric component also has an elasticity which is greater than that of the second polymer component. A process producing elastomeric spunbonded nonwoven fabrics which utilizes the activation by incremental stretching of the strands is also provided.

Description

[0001] This application claims priority to provisional application Ser. No. 60 / 420,949, filed Oct. 24, 2002, incorporated herein by reference.FIELD OF THE INVENTION [0002] The invention relates to nonwoven fabrics produced from multi-component strands, processes for producing nonwoven webs and products using the nonwoven webs. The nonwoven webs of the invention can be produced from multi-component strands including at least two components, a first, elastic polymeric component and a second, extensible but less elastic polymeric component. BACKGROUND OF THE INVENTION [0003] In recent years there has been a dramatic growth in the use of nonwovens, particularly elastomeric nonwovens, in disposable hygiene products. For example, elastic nonwoven fabrics have been incorporated into bandaging materials, garments, diapers, support clothing, and feminine hygiene products. The incorporation of elastomeric components into these products provides improved fit, comfort and leakage control. [0004...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D04H13/00D01F8/06D01F8/16D04H3/00D06C3/00
CPCD01F8/06D01F8/16D04H3/00D04H3/14D06C3/00Y10T442/602Y10T442/601Y10T442/641Y10T442/69Y10T442/637Y10T442/627D04H3/10D04H3/11D04H3/005D01D5/30
Inventor AUSTIN, JARED A.KESSELMEIER, RUEDIGER
Owner DOW GLOBAL TECH LLC
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