One-step spun elastic composite filament and preparation method thereof

A composite yarn and elastic technology, applied in the direction of single-component polyester rayon, single-component copolyester rayon, etc., can solve the problems of color spots, difficult coloring, uneven dyeing, etc. The effect of good extensibility and maintaining dimensional stability

Active Publication Date: 2018-05-18
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of poor fiber heat setting effect, difficult coloring, uneven dyeing and color spots caused by the high content of oligomers in polyester fibers in the prior art, and

Method used

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  • One-step spun elastic composite filament and preparation method thereof
  • One-step spun elastic composite filament and preparation method thereof
  • One-step spun elastic composite filament and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A kind of preparation method of one-step spinning elastic composite yarn, concrete steps are as follows:

[0057] (1) prepare modified polyester;

[0058] (a) esterification reaction;

[0059] Prepare a slurry of terephthalic acid, ethylene glycol and 2-ethyl-2-methyl-1,3-propanediol with a molar ratio of 1:1.2:0.03, add antimony trioxide, titanium dioxide and triphenyl phosphate After mixing evenly, carry out the esterification reaction under pressure in a nitrogen atmosphere. At the end of the oxidation reaction, the addition of antimony trioxide is 0.01% of the weight of terephthalic acid, the addition of titanium dioxide is 0.20% of the weight of terephthalic acid, and the addition of triphenyl phosphate is 0.01% of the weight of terephthalic acid. 0.05%, wherein the structural formula of 2-ethyl-2-methyl-1,3-propanediol is as follows:

[0060]

[0061] (b) polycondensation reaction;

[0062] After the esterification reaction is over, start the polycondensati...

Embodiment 2

[0066] A kind of preparation method of one-step spinning elastic composite yarn, concrete steps are as follows:

[0067] (1) prepare modified polyester;

[0068] (a) esterification reaction;

[0069] Prepare terephthalic acid, ethylene glycol and 2,2-diethyl-1,3-propanediol in a molar ratio of 1:1.3:0.04 to form a slurry, add antimony ethylene glycol, titanium dioxide and trimethyl phosphate and mix well Finally, the esterification reaction is carried out under pressure in a nitrogen atmosphere, the pressurized pressure is normal pressure, and the temperature of the esterification reaction is 260 ° C. When the amount of water distilled in the esterification reaction reaches 91% of the theoretical value, it is an esterification reaction. End point, wherein the addition of ethylene glycol antimony is 0.02% of the weight of terephthalic acid, the addition of titanium dioxide is 0.21% of the weight of terephthalic acid, and the addition of trimethyl phosphate is 0.03% of the weig...

Embodiment 3

[0076] A kind of preparation method of one-step spinning elastic composite yarn, concrete steps are as follows:

[0077] (1) prepare modified polyester;

[0078] (a) esterification reaction;

[0079] Prepare a slurry of terephthalic acid, ethylene glycol and 2-butyl-2-ethyl-1,3-propanediol with a molar ratio of 1:1.4:0.05, add antimony acetate, titanium dioxide and trimethyl phosphite to mix After uniformity, carry out esterification under pressure in a nitrogen atmosphere, the pressurized pressure is 0.1 MPa, the temperature of the esterification reaction is 252 ° C, when the amount of water distilled in the esterification reaction reaches 92% of the theoretical value, it is esterification At the end of the reaction, the addition of antimony acetate is 0.03% of the weight of terephthalic acid, the addition of titanium dioxide is 0.23% of the weight of terephthalic acid, and the addition of trimethyl phosphite is 0.01% of the weight of terephthalic acid , wherein the structu...

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Abstract

The invention relates to a one-step spun elastic composite filament and a preparation method thereof. Two kinds of modified polyester with different viscosities are melted, metered, subjected to complex extrusion, cooled, oiled, stretched, heat-set and wound respectively, and the one-step spun elastic composite filament is prepared, wherein each of molecular chains of the two kinds of modified polyesters with different viscosities comprises a terephthalic acid chain segment, an ethanediol chain segment and a branched diol chain segment, and the structural formula of branched diol is as shown in the description. In the formula, R1 and R2 are independently selected from linear-chain alkylidene groups with 1-3 carbon atoms, R3 is selected from alkyl groups with 1-5 carbon atoms, and R4 is selected from alkyl groups with 2-5 carbon atoms. The elastic shrinkage of the prepared one-step spun elastic composite filament is higher than or equal to 35%. The method is simple and reasonable, and the prepared one-step spun elastic composite filament has the advantages of higher elasticity, good extensibility and the like, can also maintain dimensional stability and has excellent popularizationvalue.

Description

technical field [0001] The invention belongs to the field of fiber preparation, and relates to a one-step spinning elastic composite yarn and a preparation method thereof. Background technique [0002] Since the appearance of polyethylene terephthalate (PET) fiber, it has developed rapidly because of its excellent performance, and its output has become the crown of synthetic fiber in the world. Polyester fiber has a series of excellent properties such as high breaking strength, high elastic modulus, moderate resilience, excellent heat setting performance, good heat resistance and light resistance, acid resistance, alkali resistance and corrosion resistance, and the fabric prepared from it has wrinkle resistance. And good stiffness, so polyester fiber is widely used in clothing and home textiles and other fields. [0003] However, during the polycondensation reaction of synthesizing ethylene terephthalate, especially when producing linear high polymers, linear and cyclic oli...

Claims

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Application Information

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IPC IPC(8): D01F6/84C08G63/183C08G63/78
CPCD01F6/84C08G63/183C08G63/78D01F6/92C08L67/02C08L67/06C08L2203/12C08L2205/025
Inventor 范红卫金管范陈明任怀林王永锋王相明
Owner JIANGSU HENGLI CHEM FIBER
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