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Side-by-side type 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 that the fiber does not have shrinkage, the fiber has no cationic dyeability, etc., and achieves elastic recovery. High rate, low L value, good elasticity

Inactive Publication Date: 2017-12-01
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 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
[0004] Chinese patent CN101851812A discloses a side-by-side composite fiber formed of polybutylene terephthalate and polyethylene terephthalate, and the intrinsic viscosity difference between the two is 0.40-1.05dl / g, But the fiber has no cationic dyeability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The side-by-side composite fiber is prepared by melting method, and the polybutylene terephthalate (PBT) with an intrinsic viscosity of 1.10dl / g and cationic dye with an intrinsic viscosity of 0.50dl / g and a S element content of 0.40wt% can be dyed together. Polyesters were co-spun and their intrinsic viscosity difference was 0.60 dl / g. Dry separately to make the water content less than 80ppm, put the dried polybutylene terephthalate and cationic dyeable copolyester into A and B screw respectively at a weight ratio of 50:50 for extrusion. The temperature of the A screw is 260°C, the temperature of the B screw is 270°C, and the temperature of the spinning box is 275°C. Spinning was performed using a side-by-side spinneret. The coiling speed is set to be 2500m / min to obtain a pre-oriented yarn of 150T-24f.

[0037] The coiled pre-oriented yarn is false-twisted, the temperature of the false-twisting hot needle is 90°C, the temperature of the hot box is 150°C, the elongat...

Embodiment 2

[0040] Select the polybutylene terephthalate that intrinsic viscosity is 1.25dl / g, the cationic dye dyeable copolyester that intrinsic viscosity is 0.65dl / g, other carry out composite spinning with embodiment 1. See Table 1 for specific values.

Embodiment 3

[0042] Select the polybutylene terephthalate with intrinsic viscosity of 1.20dl / g, the cationic dye-dyeable copolyester with intrinsic viscosity of 0.60dl / g, and carry out composite spinning with embodiment 1. See Table 1 for specific values.

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Abstract

The invention discloses a side-by-side composite fiber, which is composed of cationic dye-dyeable copolyester with intrinsic viscosity of 0.45-0.65dl / g and polybutylene terephthalate with intrinsic viscosity of 1.00-1.50dl / g The esters are compounded side by side, and the weight ratio of cationic dye-dyeable copolyester to polybutylene terephthalate is 70:30-30:70. The stretching elongation rate of the fiber is 25%-100%, the elastic recovery rate is above 85%, and the color development L value after cationic dyeing is below 14.0.

Description

technical field [0001] The invention relates to a side-by-side composite fiber with good elasticity and cationic dyeability. Background technique [0002] Polyester fiber is a typical thermoplastic synthetic fiber. Since its birth, it has been widely used in clothing and industry due to its excellent mechanical strength, chemical resistance, and heat resistance. The side-by-side composite fiber is a composite fiber with excellent mechanical properties and good thermal shrinkage properties combined with two polymers side by side. Since the beginning of the 21st century, this juxtaposed elastic fiber has attracted more and more attention, and has gradually occupied a pivotal position in the field of chemical fibers. It has self-curling properties, and based on the different shrinkage properties of the two components in the composite fiber, it can produce a helical three-dimensional crimp. Its advantages are high bulkiness, good elasticity and recovery, and excellent hand fee...

Claims

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Application Information

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IPC IPC(8): D01F8/14D01D5/32D01D5/08
CPCD01F8/14D01D5/08D01D5/32
Inventor 范志恒季亚娟吉宫隆之
Owner TORAY FIBER RES INST(CHINA) CO LTD
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