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 men

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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Example Embodiment

[0077] Example 1

[0078] In the manufacture of crimped composite 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 and a molecular weight distribution index ( PDI) is 2.4 polytrimethylene terephthalate, its weight ratio is 5:5, using existing melt composite spinning equipment to figure 2 -(d) The eccentric core-sheath cross-section, the spinning temperature is set to 270℃, the spinning speed is 2200 m / min, the residence time in the module is 4 minutes, and the polyester composite fiber with a monofilament fineness of 3.4 denier is manufactured . The composite fiber obtained by the spinning / winding was stretched by another stretching device to produce a crimped stretchable composite fiber imparted with a spring-shaped crimp, and the single filament fineness was 2.1 denier. The stretching ratio during stretching was 1.75, the stretching te...

Example Embodiment

[0079] Example 2

[0080] In the manufacture of crimped composite 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 2.1 polytrimethylene terephthalate with a weight ratio of 5:5. The existing melt composite spinning equipment is used to figure 2 -(a) The side-by-side cross-section, the spinning temperature is set to 275°C, the spinning speed is 2600 m / min, the residence time in the module is 4 minutes, and the polyester composite fiber with a single filament fineness of 3.4 denier is produced. The composite fiber obtained by the spinning / winding was stretched by another stretching device to produce a crimped stretchable composite fiber imparted with a spring-shaped crimp, and the single filament fineness was 2.1 denier. The stretching ratio during stretching was 1.70, the stretching temp...

Example Embodiment

[0081] Example 3

[0082] In the manufacture of crimped composite 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 and a molecular weight distribution index ( PDI) is 1.6 polytrimethylene terephthalate, its weight ratio is 5:5, using existing melt composite spinning equipment to figure 2 -(a) The side-by-side cross-section, the spinning temperature is set to 285°C, the spinning speed is 3800 m / min, the residence time in the module is 4 minutes, and the polyester composite fiber with a monofilament fineness of 3.4 denier is produced. The composite fiber obtained by the spinning / winding was stretched by another stretching device to produce a crimped stretchable composite fiber imparted with a spring-shaped crimp, and the single filament fineness was 2.1 denier. The stretching ratio during stretching was 3.7, the stretching temperature was ...

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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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