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Stretch yarns and fabrics with multiple elastic yarns

a technology applied in the field of fabric manufacturing of stretch composite yarns and fabrics, can solve the problems of high recovery, low shrinkage performance, and difficult to obtain fabrics with easy stretch, and achieve the effects of low shrinkage performance, high recovery, and easy stretch

Pending Publication Date: 2015-12-10
THE LYCRA CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes methods for making double elastic composite yarns and stretch fabrics and garments made from them. The composite yarns have two sets of different elastic core fibers with different properties, which are covered together. The elastic core fibers may be bare or pre-covered with an elastic yarn. The fabric may be used to make garments, which can be stretched to different lengths. The technical effects of this patent include improved stretchability and comfort of fabrics and garments, as well as the ability to make specific types of stretch fabrics.

Problems solved by technology

It is difficult to obtain the fabrics which have easy stretch, high recovery and low shrinkage performance.
However, for the fabric with low tensile modulus, a typical quality issue is that the fabric can't quickly recovery to original size and shape after fabrics are over stretched out in some parts of the body, such as in knee, butt and waist, particularly for the fabrics with high stretch level.
Usually, the fabric has low recovery power when the tensile modulus is low.
Consumers see baggy and saggy issues after long time wear.
However, these fabrics have high extension modulus and higher restrict force.
Consumers complain higher garment pressures and uncomfortable restriction during wearing and movement.
In the same time, the fabric has poor dimension stability.
The garment comfort and freedom of movement are compromised by fabric shape retention and recovery function.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Stretch yarns and fabrics with multiple elastic yarns
  • Stretch yarns and fabrics with multiple elastic yarns
  • Stretch yarns and fabrics with multiple elastic yarns

Examples

Experimental program
Comparison scheme
Effect test

examples

[0067]The following examples demonstrate the present invention and its capability for use in manufacturing a variety of fabrics. The invention is capable of other and different embodiments, and its several details are capable of modifications in various apparent respects, without departing from the scope and spirit of the present invention. Accordingly, the examples are to be regarded as illustrative in nature and not as restrictive.

[0068]For each of the following denim fabric examples, 100% cotton open end spun yarn or ring spun was used as warp yarn. For denim fabrics, they included two count yarns: 7.0 Ne OE yarn and 8.5 Ne OE yarn with irregular arrangement pattern. The yarns were indigo dyed in rope form before beaming. Then, they were sized and made the weaving beam. For bottom weight fabrics, the warp yarn are 20Ne 100% cotton ring spun yarn. They were sized and made the weaving beam.

[0069]Table 1 lists four examples of core spun yarn with traditional one elastic core filamen...

example yarn a

Typical Core Spun Yarn with One Elastic Core Fiber

[0073]This is not an innovative yarn. This core spun yarn is 16Ne with one 40d LYCRA® spandex fiber covered by cotton sheath. The draft of the LYCRA® fiber is 3.5× during covering process. The cotton twist level TM is 18 twisters per inch. This yarn has 17.71% recoverable stretch after boil off.

example yarn b

Core Spun Yarn with Two Core Elastic Fibers

[0074]The core spun yarn is 16Ne with two sets of LYCRA® spandex fiber covered by cotton sheath. Elastic core I fiber is 20D T162B and Elastic core II fiber is 20D T162B as well. The total denier of the elastic finer is 40 denier. The draft of the LYCRA® fiber is 3.5× during covering process. The cotton twist level TM is 18 twisters per inch. Therefore, this core spun yarn has the same structure with Example Yarn A, including in yarn count, LYCRA® fiber denier and yarn twist level, except with 2 sets of core elastic filaments instead of one end of core spun yarn. The recoverable stretch of this yarn is 20.63%, which has 2.92 unit percent higher than yarn in sample A. That means the yarn with two sets of filaments core has high recoverable stretch than the yarn with one set of filament core under the same content of spandex. In this way, the innovative yarn can provide high stretch and high recovery power for the fabrics by using the same am...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

Included herein is an articles and methods including a core spun yarn. The core spun yarn includes a sheath of hard fibers and two sets of elastic fibers wherein the sets of elastic fibers have different properties. The properties may differ in one or more ways such as having a different denier, composition or draft. One or both of the sets of elastic fibers can be precovered.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]This invention relates to the manufacture of stretch composite yarns and fabrics. It specifically relates to the fabrics and methods including two sets of elastic core fibers within one yarn.[0003]2. Summary of Related Art[0004]Stretch fabrics with elastic composite yarn have been on the markets for long time. Fabric and garment manufacturers generally know how to make fabrics with the right quality parameters to achieve fabrics acceptable to consumers. In current commercially available fabrics, only one elastic fiber system exists inside yarn and fabrics. One elastic fiber provides double functions: stretch and recovery. It is difficult to obtain the fabrics which have easy stretch, high recovery and low shrinkage performance.[0005]Easy stretch is one important characteristic for comfort garment. For garment with greater comfort, the fabric can be easy stretched out when garment is put on human body and move. They have...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D02G3/38D03D15/08D02G3/32D03D15/56
CPCD02G3/38D02G3/328Y10T442/3008Y10T428/2936D03D15/08D03D15/56D02G3/324
Inventor LIAO, TIANYILEUNG, RAYMOND S. P.
Owner THE LYCRA CO LLC
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