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A side-by-side composite fiber

A composite fiber and fiber technology, which is applied in fiber processing, filament/thread forming, conjugated synthetic polymer rayon, etc., can solve the problems of high elongation of elastic elastic fibers, affecting appearance, and limiting the scope of use. Achieve the effect of improving the elastic recovery rate, good elasticity, and reducing the cost of fiber raw materials

Active Publication Date: 2021-01-01
TORAY FIBERS NANTONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But because what this application uses is hot-needle extension false-twisting processing, namely so-called outer false-twisting, its elongation of the obtained elastic elastic fiber is relatively too high, thereby its fabric is prone to wrinkle deformation after stretching, although because of relatively High elastic recovery rate can recover properly, but affects its appearance and limits its application range
[0006] Chinese patent CN1854355A discloses a side-by-side composite fiber in which cationic dye-dyeable copolyester components and polyethylene terephthalate components are compounded side by side, but in the fiber, cationic dye-dyeable copolyester components and The intrinsic viscosities of polyethylene terephthalate components are not much different, the difference in viscosity is only 0.02-0.10, and the fiber does not have good shrinkage

Method used

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  • A side-by-side composite fiber
  • A side-by-side composite fiber
  • A side-by-side composite fiber

Examples

Experimental program
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Effect test

Embodiment 1

[0051] 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.

[0052] False-twisting disc-false-twisting processing is performed on the wound pre-oriented yarn, the temperature of the hot box is 190°C, the false-twisting m...

Embodiment 2

[0055] 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

[0057] 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 a side-by-side composite fiber, which is composed of polybutylene terephthalate with an intrinsic viscosity of 1.00-2.00dl / g and polyester with an intrinsic viscosity of 0.45-0.65dl / g in a ratio of 70:30. The weight ratio of ~30:70 is obtained by side-by-side composite spinning and then processed by false twisting. Among them, the intrinsic viscosity difference between polybutylene terephthalate and polyester is 0.35~1.55dl / g, and the fiber's The elastic elongation rate is 20-129%, and the elastic recovery rate is above 65%.

Description

technical field [0001] The invention relates to a side-by-side composite fiber with good elasticity, in particular to a two-component elastic fiber containing polybutylene terephthalate. Background technique [0002] Side-by-side composite fibers are the earliest developed composite fiber varieties with large output and relatively important. Initially, when people were researching and developing composite fibers, they mainly wanted to simulate the crimp elasticity of natural wool with chemical fibers. As people continue to deepen the microstructure, it is found that the cross-section of wool is different from other natural fibers. It is composed of two semicircular cortex and secondary cortex that are closely bonded to each other. The properties and arrangements of various structural units (microfibril crystalline regions and disordered regions, etc.) in these two parts are different. In the dry state, the secondary cortex shrinks slightly less than the normal cortex, so it...

Claims

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Application Information

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IPC IPC(8): D01F8/14D01D5/32D01D5/08
CPCD01D5/08D01D5/32D01F8/14
Inventor 范志恒於朝来赵锁林季亚娟吉宫隆之
Owner TORAY FIBERS NANTONG CO LTD
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