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Stretch circular knit fabrics containing elastomeric fiber and polyester bi-component filament, garments made therefrom and a method of making same

a technology of elastomeric fiber and polyester bi-component filament, which is applied in the direction of knitting, textiles and papermaking, ornamental textile articles, etc., can solve the problems of single elastic fiber generally incomplete, knit stitch rearrangement, and single elastic fiber recovery, and consumers may see the effect of permanent deformation or ‘bagging’ of single elastic knit fabrics

Inactive Publication Date: 2019-10-10
THE LYCRA CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a fabric made from polyester bi-component filament. One advantage of this fabric is that it is more resistant to chemical and environmental elements like chlorine and UV light compared to elastomeric fibers like spandex. This means that the fabric performs better in outdoor activities like swimming and other sports that are exposed to these elements. In summary, this fabric is designed to provide high performance in various environments.

Problems solved by technology

However, recovery by knit stitch rearrangement and single elastic fiber is generally incomplete because the yarns do not provide adequate recovery force to rearrange the stretched knit stitches.
As a consequence, single elastic knit fabrics may experience permanent deformations or ‘bagging’ in certain garment areas, such as at the elbows of shirtsleeves, where more stretching occurs.
Consumers thus see bagging and sagging issues after long time wear.
Due to the loop structure, circular knit fabrics exhibit lower holding forces as high deformation as compared with woven fabrics, which limits the penetration of circular knits in bottom weights.
However, higher spandex content creates other quality issues such as high fabric shrinkage, edge curling, and rubber touch feeling.
It is difficult to obtain fabrics which have easy stretch, high recovery, low shrinkage and good stability.
Another potential problem is the see-through issue for knit fabric, particularly in bottom wear such as yoga pants.
Such fabrics may become too shear and therefore see-through when a wearer bends over or stretches thus revealing a wearer's undergarments and / or body parts.
This problem may be difficult to detect when the wearer is simply standing.
When used in knitted fabrics, however, it has a tendency of showing severe, random, uneven surfaces making the fabric appearance as well as touch feeling undesirable.

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 circular knit fabrics containing elastomeric fiber and polyester bi-component filament, garments made therefrom and a method of making same
  • Stretch circular knit fabrics containing elastomeric fiber and polyester bi-component filament, garments made therefrom and a method of making same
  • Stretch circular knit fabrics containing elastomeric fiber and polyester bi-component filament, garments made therefrom and a method of making same

Examples

Experimental program
Comparison scheme
Effect test

example 2

rsey Fabric with Two Different Elastic Fibers

[0121]This sample had the same fabric structure as in example 1C with the exception of the incorporation of 50D LYCRA® T400® fiber. The fabric contained two elastic yarns in accordance with the present invention: 40D LYCRA® spandex fiber and 50d / 34f LYCRA® T400® polyester bi-component filament. The cotton yarn was 50 Ne count yarn. Table 1 summarizes the test results. It is clear that this sample had good stretch (length 85.3%×width 116.4%). The fabric also has low shrinkage. The fabric also has improved recovery power (length 205.9%×width 146.2%). Adding polyester bi-component filament significantly increased the jersey fabric holding force and limited the extra elongation in width direction, while at same time increasing the recovery force in both directions. Fabrics demonstrated high stable dimension and strong shape retention ability. The fabric contained 4.6% LYCRA® fiber, 28.0% LYCRA® T400® bi-component fiber and 67.4% cotton.

example 3

yer Knit Containing Double Elastic Fibers

[0122]This sample had the same fabric structure as in example 2 with the exception of the denier of LYCRA® T400® fiber: 40D T162B LYCRA® fiber with 2.7× draft and 75d / 34f LYCRA® T400® fiber with 1.10× draft was used. The hard yarn was 50 Ne 100% cotton ring spun yarn with single jersey stitch structure. The finished fabric had a weight of 6.1 oz / yard2 and 84.5% and 118.3% stretch in the length and width direction, respectively. The fabric recovery power was 314.6 grams×214.6 grams in length and width direction. As shown, the high denier of LYCRA® T400® fiber helped to increase the fabric recovery force in both directions. The fabric contains 7.6% LYCRA® fiber, 37.8% LYCRA® T400® bi-component fiber and 54.6% cotton.

example 4

yer Knit Containing Double Elastic Fibers

[0123]This sample had the same fabric structure as in example 2 with the exception of the denier of LYCRA® fiber: 70D T162B LYCRA® fiber, 2.7× draft and 1.05× draft for 70D LYCRA® fiber and 75d / 34fLYCRA® T400® fiber were used. The hard yarn was 50 Ne 100% cotton ring spun yarn with single jersey stitch structure. The finished fabric had a weight of 6.5 oz / yard2 and 100.8% and 97.3% stretch in length and width direction, respectively. The fabric recovery power was 290.2 grams×249.7 grams in length and width direction. As shown herein, the high denier of LYCRA® fiber increases the fabric recovery force in both directions. The fabric contains 14.4% LYCRA® fiber, 26.3% LYCRA® T400® bi-component fiber and 59.3% cotton.

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

Stretch circular knit fabric (40, 82, 94) containing two sets of different elastic fiber (12, 18) and optionally hard yarn (14) and methods for their production are provided.

Description

FIELD OF INVENTION[0001]The present invention relates to the manufacture of stretch circular knit fabric containing two sets of different elastic fibers with enhanced anti see-through, high holding force and recovery power. The elastic circular knit fabric is produced from elastomeric elastic fiber and polyester bi-component filament and optionally hard yarns.BACKGROUND[0002]Elastomeric fibers are commonly used to provide stretch and elastic recovery in knit fabrics and garments.[0003]Most available stretch circular knit fabrics on the market are made with a single type of elastic fiber and hard fibers. Such fabrics are widely known as comfort fabrics as they can more easily deform and / or stretch during wear. The wearing comfort of garments made from these knit fabrics comes from their stitch rearrangement and elastic fiber extension. However, recovery by knit stitch rearrangement and single elastic fiber is generally incomplete because the yarns do not provide adequate recovery for...

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): D04B1/12D04B1/18
CPCD04B1/123D04B1/18D10B2403/0114D10B2403/0241D04B1/24D04B1/16D10B2331/04D10B2401/061D10B2501/00D10B2331/10
Inventor LIAO, TIANYIHIETPAS, GEOFFREY D.WYNEGAR, FRED C.
Owner THE LYCRA CO LLC
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