Composite fibre and producing method thereof

A composite fiber and manufacturing method technology, applied in fiber processing, rayon manufacturing, fiber chemical characteristics, etc., can solve the problems of inability to obtain molecular weight distribution, no molecular weight and molecular weight distribution, etc., and achieve the minimum reduction in raw silk physical properties and stretchability chemical, good product stability, and excellent expansion and contraction properties

Active Publication Date: 2005-09-28
HYOSUNG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Of course, with the Mark-Hawinkequation, although the molecular weight can be inferred from the viscosity-molecular weight relationship, information about the molecular weight distribution cannot be obtained
In addition, in Patent Document 4, it is mentioned that stretchable composite fibers using two kinds of polyester polymers with different viscosity differences between PTT, or PTT-PET, PTT-PBT, etc., but there is no information about molecular weight and molecular weight distributed information

Method used

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  • Composite fibre and producing method thereof
  • Composite fibre and producing method thereof
  • Composite fibre and producing method thereof

Examples

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Effect test

Embodiment 1

[0078] In the manufacture of crimped conjugate fibers, polyethylene terephthalate with a number average molecular weight (Mn) of 12632 and a molecular weight distribution index (PDI) of 2.2 and a number average molecular weight (Mn) of 19149 with a molecular weight distribution index ( PDI) is the poly(trimethylene terephthalate) of 2.4, and its weight ratio is 5: 5, utilizes existing melt composite spinning equipment, with figure 2 - (d) eccentric core-sheath cross-section, set the spinning temperature at 270°C, spinning speed at 2200 m / min, residence time in the module at 4 minutes, and manufacture polyester composite fibers with a monofilament fineness of 3.4 denier . The conjugated fiber obtained by the above-mentioned spinning / coiling was stretched by another stretching device to produce a crimped stretchable conjugated fiber imparted with a spring-shaped crimp, and its single filament fineness was 2.1 denier. Table 1 shows the results of stretching at a stretching rati...

Embodiment 2

[0080] In the manufacture of crimped conjugate fibers, polyethylene terephthalate with a number average molecular weight (Mn) of 15385 and a molecular weight distribution index (PDI) of 2.1 and a number average molecular weight (Mn) of 33522 and a molecular weight distribution index ( PDI) is the poly(trimethylene terephthalate) of 2.1, and its weight ratio is 5: 5, utilizes existing melt composite spinning equipment, with figure 2 - (a) side-by-side section, set the spinning temperature to 275°C, the spinning speed to 2600 m / min, and the residence time in the module to be 4 minutes to produce a polyester composite fiber with a single filament fineness of 3.4 denier. The conjugated fiber obtained by the above-mentioned spinning / coiling was stretched by another stretching device to produce a crimped stretchable conjugated fiber imparted with a spring-shaped crimp, and its single filament fineness was 2.1 denier. Table 1 shows the results of stretching at a stretching ratio of ...

Embodiment 3

[0082] In the manufacture of crimped conjugate fibers, polyethylene terephthalate with a number average molecular weight (Mn) of 18211 and a molecular weight distribution index (PDI) of 2.1 and a number average molecular weight (Mn) of 88245 with a molecular weight distribution index ( PDI) is the poly(trimethylene terephthalate) of 1.6, and its weight ratio is 5: 5, utilizes existing melt composite spinning equipment, with figure 2 -(a) side-by-side section, set the spinning temperature to 285°C, the spinning speed to 3800 m / min, and the residence time in the module to be 4 minutes to produce a polyester composite fiber with a single filament fineness of 3.4 denier. The conjugated fiber obtained by the above-mentioned spinning / coiling was stretched by another stretching device to produce a crimped stretchable conjugated fiber imparted with a spring-shaped crimp, and its single filament fineness was 2.1 denier. Table 1 shows the results of stretching at a stretching ratio of ...

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Abstract

This invention provides a crimp forming conjugate fiber excellent in stretchability and improved in product stability in post processing and a method for producing the same. The crimp forming conjugate fiber is a side-by-side or an excentric sheath-core type fiber remarkably stable for heat hysteresis, tension and the like given to the fiber in knitting, weaving and dyeing processing. The stretchable conjugate fiber produced by the invention is remarkably excellent in product stability during post processing as the fiber has high stretchability with >=40% rate of crimp stretch, >=70% elastic recovery factor, >=155[deg.]C maximum temperature of thermal contraction stress and <=3% iron shrinkage of the finally processed fabric. Different fiber forming polymers having 5,000-70,000 number average molecular weight difference and 1.5-2.5 molecular weight distribution index in each fiber are used as the polymer.in the invention.

Description

technical field [0001] The present invention relates to a crimped conjugate fiber having excellent stretchability and improved product stability during post-processing and a method for producing the same. More specifically, it relates to a side-by-side or eccentric core-sheath type crimped composite fiber and a manufacturing method thereof, the crimped composite fiber has high stretchability, a crimp elongation rate of 40% or more, an elastic recovery rate of 70% or more, and at the same time Since the maximum temperature of thermal shrinkage stress is greater than or equal to 155°C, the fiber is very stable to the heating process and tension during weaving and dyeing. Background technique [0002] Patent Document 1 discloses a method of using two types of polyethylene terephthalate (PET) having a difference in limiting viscosity. In addition, Patent Document 2 and Patent Document 3 disclose a method of producing polyester fibers having latent curl expression using ordinary...

Claims

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Application Information

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IPC IPC(8): D02G1/00D01D5/08D01F8/14D02G1/02D02G3/04D02G3/26D02J1/22D03D15/56
CPCD01F8/14D01F1/02D01D5/34D01D5/098D01D10/02D02G3/04D02G3/26D10B2401/061D10B2401/062
Inventor 吴圣镇李炯在孙亮国权益铉
Owner HYOSUNG CORP
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