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Parallel composite elastic fiber and manufacture method thereof

An elastic fiber, manufacturing method technology, applied in fiber processing, conjugated synthetic polymer rayon, filament/thread forming, etc., can solve the problems of poor intrinsic viscosity, high intrinsic viscosity of PET, low potential shrinkage rate of fibers, etc. , to achieve good elasticity, improve elastic recovery rate, and reduce costs

Active Publication Date: 2012-07-04
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The elastic fibers obtained by stretching and cutting through the combination of these two intrinsic viscosities of PBT and PET, but due to the small intrinsic viscosity difference and the high intrinsic viscosity of PET, the potential shrinkage rate of the fiber is not high, and high elasticity cannot be obtained after stretching Elongation and elastic recovery

Method used

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  • Parallel composite elastic fiber and manufacture method thereof
  • Parallel composite elastic fiber and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The two-component elastic fiber is prepared by the melting method, and polybutylene terephthalate with an intrinsic viscosity of 1.31dl / g and polyethylene terephthalate with an intrinsic viscosity of 0.51dl / g are selected for composite spinning. Their intrinsic viscosity difference is 0.80dl / g. Dry them separately so that the water content is less than 100ppm, and then put the dried polybutylene terephthalate and polyethylene terephthalate into No. 1 / No. 2 spinning boxes at a weight ratio of 50:50. Set the spinning temperature, the screw temperature of the No. 1 extruder is 265°C; the screw temperature of the No. 2 spinning machine is 285°C; the temperature of the spinning box is 270°C. Use side-by-side spinnerets to spin out, set the winding speed to 2500m / min, and control the raw silk variety to 300dtex / 48F.

[0022] False-twisting processing is carried out on the wound pre-oriented yarn. The temperature of the hot needle after feeding the roller on the false twister...

Embodiment 2

[0025] Adopt the polymer weight ratio identical with embodiment 1, spinning temperature, spinning speed, precursor kind, processing method, processing temperature, processing ratio, processing speed, but change the intrinsic viscosity difference of two kinds of polymers, select intrinsic viscosity Polybutylene terephthalate with an intrinsic viscosity of 1.50dl / g and polyethylene terephthalate with an intrinsic viscosity of 0.45dl / g were used for composite spinning, and their intrinsic viscosity difference was 1.05dl / g. See Table 1 for specific values.

Embodiment 3

[0027] Adopt the polymer weight ratio identical with embodiment 1, spinning temperature, spinning speed, precursor kind, processing method, processing temperature, processing ratio, processing speed, but change the intrinsic viscosity difference of two kinds of polymers, select intrinsic viscosity Polybutylene terephthalate with an intrinsic viscosity of 1.00dl / g and polyethylene terephthalate with an intrinsic viscosity of 0.60dl / g are used for composite spinning, and their intrinsic viscosity difference is 0.40dl / g. See Table 1 for specific values.

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Abstract

The invention discloses parallel composite elastic fiber and a manufacture method thereof. The parallel composite elastic fiber is obtained through false twisting process after parallel composite spinning of valox and polyethylene glycol terephthalate according to a weight ratio of 70 / 30 to 30 / 70, wherein the inherent viscosity of the valox is between 0.45 to 0.60 dl / g, and the difference of the inherent viscosity of the valox and the inherent viscosity of the polyethylene glycol terephthalate is between 0.40 and 1.05 dl / g. The elastic extensibility of the elastic fiber of the invention is between 130 and 220 percent, and the elastic recovery rate is higher than 85 percent.

Description

technical field [0001] The invention relates to a side-by-side composite elastic fiber, in particular to a two-component elastic fiber containing polybutylene terephthalate. Background technique [0002] Composite fiber is a new type of chemical fiber developed in the 1960s in the world, and the two-component composite fiber is also called two-component fiber or conjugate fiber. It is to transport two kinds of fiber-forming high polymer melts with different components, proportions, viscosities, etc. to the same spinning assembly, meet at the appropriate part of the assembly, and spray out from the same spinneret hole to form a fiber. [0003] Side-by-side composite fiber is the earliest developed composite fiber variety with large output and relatively important. When people first researched and developed composite fiber, they mainly wanted to simulate the crimp elasticity of natural wool with chemical fiber. As people continue to deepen the microstructure, it is found that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/14D01D5/32D02G1/02
Inventor 张雷曹海兵藤森稔
Owner TORAY IND INC
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