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Core spun yarn and woven stretch fabric

a stretch fabric and core spun technology, applied in the field of core spun yarns, can solve the problems of poor appearance after finishing operation or in-house washing, high shrinkage, and excessive stretch power of conventional stretch fabrics made by using core spun spandex yarns, and achieve the effect of high dra

Inactive Publication Date: 2008-12-25
CENT TEXTILES HK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]According to yet another aspect there is provided a core spun yarn comprising a bi-component polyester filament and an elastomeric fiber. The elastomeric fiber has a higher draft than the bi-component polyester fiber.

Problems solved by technology

Conventional stretch fabrics made by using core spun spandex yarn has, in general, too much stretch power.
Without heat setting, there will be high shrinkage and poor appearance after a finishing operation or in-house washing.
However, the required heat setting process is time and cost consuming with many side affects such as affected elongation, growth and the stability of the fabric width.
This is a tedious process and can reduce the elastic properties of the fabric.
Also, it is limited to denim fabric.
Additionally, the elongation of the fabric is limited and can only be adjusted by the fabric construction which, in order to get a higher stretchability, resulted in a fabric that was “too soft”.

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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  • Core spun yarn and woven stretch fabric
  • Core spun yarn and woven stretch fabric
  • Core spun yarn and woven stretch fabric

Examples

Experimental program
Comparison scheme
Effect test

example 1

t Stretch Fabric

[0035]This example shows the weft stretch denim fabric as shown in Table 1 below. Fabric no. 1 is in accordance with the present disclosure and uses a core bi-component polyester and spandex spun yarn in the weft, whereas fabric no. 2 and fabric no. 3 are previously known stretch fabrics made by using core bi-component polyester filament and a bare bi-component polyester filament respectively. As will be noted, fabric no. 1, in accordance with the present invention, obtains a better elongation as compared to fabrics no. 2 and fabric no. 3, and has a 100% cotton feel. Without any heat set process, fabric no. 1 achieves a good dimensional stability (−6.2%), good elongation (20%) and growth (2.5%). Other characteristics are summarized in Table 1.

TABLE 1Denim Woven Stretch Fabric - Weft StretchFabric Sample No.Fabric No. 1Fabric No. 2Fabric No. 3YarnWarp YarnNe7 SlubNe7 SlubNe7 SlubWeft YarnNe10 CSY 75D bi-Ne10 CSY 150D bi-Bare 600D bi-componentcomponent polyestercompone...

example 2

DYED WEFT STRETCH FABRIC

[0036]This example demonstrates a weft stretch fabric which has been dyed with a single step process. As shown in Table 2, fabric no. 4 is a fabric which uses a weft yarn in accordance with the present disclosure, which is a core bi-component polyester filament and spandex. Fabric no. 5 is a common stretch fabric with the weft yarn being a core bi-component polyester filament only. Both weft yarns had a cotton sheath, and were subjected to a one step dyeing process. As will be noted, fabric no. 4, in accordance with the present disclosure, achieved weft elongation of 21.6% and had growth of 1.9% and good stability of 3.5%. One significant advantage as compared to the use of the bare bi-component polyester filament or core bi-component polyester filament spun yarn is that the exposure of the bare polyester filament is improved. As shown in FIG. 7a, no bare polyester can be seen on fabric no. 4. On the other hand, FIG. 7b shows exposure of the bare polyester fi...

example 3

H DENIM FABRIC

[0037]This example shows the advantage of the use of yarns in accordance with the present disclosure in bi-stretch denim fabric as shown in Table 3. Fabric no. 6 uses yarns in accordance with the present disclosure and comprises a core bi-component polyester filament and spandex spun yarn both in the warp and weft direction. Fabric no. 7 comprises only a core bi-component polyester filament in the warp and weft as in previously known stretch fabrics. As shown in the table, fabric no. 6, has a higher stretch power (29%) in the weft direction. Further, the concern of exposure of the bare polyester in the warp of the previously known core bi-component polyester filament spun yarn is not a problem with the fabric no. 6 as the percentage of the polyester is much less. In this example, the exposure of the bare polyester was not seen on the finished fabric using the yarns in the present disclosure. The fabric's characteristic is summarized in Table 3.

TABLE 3Denim Woven Stretc...

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Abstract

A core spun yarn comprising a bi-component polyester filament and an elastomeric fiber. The polyester filament has a denier from about 20 to about 150 and the elastomeric fiber has a denier from 20 to 140. The polyester filament is about 2 weight percent to about 60 weight percent, based on total weight of the yarn and the elastomeric fiber is from about 1 percent to about 40 percent, based on total weight of the yarn. The elastomeric fiber may have higher draft than the bi-component polyester fiber. The polyester filament comprises poly (trimethylene terephthalate) and at least one polymer selected from the group consisting of poly (ethylene terephthalate) and poly (tetramethylene terephthalate) and said elastomeric fiber is spandex. The yarn may include a sheath of at least one staple fiber. The disclosure also includes a fabric of the bi-component polyester filament and an elastomeric fiber.

Description

TECHNICAL FIELD[0001]This invention relates generally to core spun yarns with bi-component polyester filaments and an elastomeric fiber and fabrics made there from, and more particularly, the present invention relates to core spun yarns comprising poly (trimethylene terephthalate) and poly (ethylene terephthalate) and an elastomeric fiber comprising spandex, or poly (trimethylene terephthalate) and poly (tetramethylene terephthalate) and an elastomeric fiber comprising spandex.BACKGROUND[0002]Conventional stretch fabrics made by using core spun spandex yarn has, in general, too much stretch power. As used herein, core spun yarn refers to a yarn consisting of a number of component yarns, of which one or more are constrained to lie permanently at the central axis of the composite thread, while the remaining yarns act as covering yarns. Therefore, heat set is necessary to prevent retraction of the elastic fibers and the resultant compression of the fabric. Without heat setting, there w...

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): D03D15/08D02G3/00D03D15/56
CPCD01H1/02D02G3/324D02G3/328D02G3/36D03D13/004D03D13/008D03D15/00D03D15/0027D03D15/08D10B2201/02D10B2201/24D10B2211/02D10B2331/04D10B2331/10D10B2401/061Y10T442/3008Y10T428/2929D03D15/47D03D15/56D03D15/292D03D15/283D03D15/217
Inventor CHENG, CHI PING
Owner CENT TEXTILES HK
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