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Low-shrinkage high-strength polyester industrial yarn and preparation method thereof

A high-strength, industrial yarn technology, applied in the direction of single-component copolyester rayon, synthetic polymer rayon chemical post-treatment, fiber type, etc., can solve the problems of spinneret affecting fiber quality and fiber unevenness , to achieve the effects of lowering temperature, improving fiber quality and saving energy

Active Publication Date: 2018-08-10
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the problems in the prior art that the oil agent volatilizes quickly and is easily bonded on the surface of the fiber, which causes uneven fiber and too many residual oligomers in the spinneret affect the quality of the fiber, and provides a spinning method that is uniform and Low-shrinkage high-strength polyester industrial yarn with less oligomer content and its preparation method

Method used

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  • Low-shrinkage high-strength polyester industrial yarn and preparation method thereof
  • Low-shrinkage high-strength polyester industrial yarn and preparation method thereof
  • Low-shrinkage high-strength polyester industrial yarn and preparation method thereof

Examples

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Effect test

Embodiment 1

[0089] A preparation method of low-shrinkage high-strength polyester industrial yarn, the specific steps are as follows:

[0090] (1) Preparation of modified polyester:

[0091] (a) Esterification reaction: terephthalic acid, ethylene glycol and 2-ethyl-2-methyl-1,3-propanediol in a molar ratio of 1:1.2:0.03 are made into a slurry, and antimony trioxide is added , titanium dioxide and triphenyl phosphate are mixed evenly, and 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 250°C. 90% of the value is the end point of the esterification reaction, wherein 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 It is 0.05% of the weight of terephthalic acid, wherein the structural formula of 2-ethyl-2-methyl-...

Embodiment 2

[0100] A preparation method of low-shrinkage high-strength polyester industrial yarn, the specific steps are as follows:

[0101] (1) Preparation of modified polyester:

[0102] (a) Esterification reaction; prepare terephthalic acid, ethylene glycol and 2,2-diethyl-1,3-propanediol in a molar ratio of 1:1.3:0.04 into a slurry, add ethylene glycol antimony, titanium dioxide After mixing evenly with trimethyl phosphate, carry out the esterification reaction under pressure in a nitrogen atmosphere. The pressurized pressure is normal pressure, and the temperature of the esterification reaction is 260°C. 91% is the end point of the esterification reaction, 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 0.02% of the weight of terephthalic acid. 0.03% by weight of phthalic acid, wherein the structural formula of 2,2-di...

Embodiment 3

[0110] A preparation method of low-shrinkage high-strength polyester industrial yarn, the specific steps are as follows:

[0111] (1) Preparation of modified polyester:

[0112] (a) Esterification reaction: terephthalic acid, ethylene glycol, and 2-butyl-2-ethyl-1,3-propanediol in a molar ratio of 1:1.4:0.05 are made into a slurry, and antimony acetate and titanium dioxide are added After mixing evenly with trimethyl phosphite, carry out esterification reaction under pressure in a nitrogen atmosphere. 92% is the end point of the esterification reaction, wherein 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 0.03% of the weight of terephthalic acid. 0.01% by weight of phthalic acid, wherein the structural formula of 2-butyl-2-ethyl-1,3-propanediol is as follows:

[0113]

[0114] (b) polycondensation reaction; after the est...

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Abstract

The invention relates to a low-shrinkage high-strength polyester industrial yarn and a preparation method thereof. The preparation method comprises: carrying out solid phase condensation polymerization tackifying on a modified polyester, melting, metering, extruding, cooling, oiling, drawing, carrying out heat setting, and winding, wherein the unchanged longitudinal height is maintained during thecooling, the cross section area of the slow cooling chamber is increased while the plate surface temperature of the spinning plate is maintained by using the thermal insulation method, and the oil agent for oiling contains 67.30-85.58 wt% of crown ether. According to the present invention, the preparation method is simple; the material of the prepared low-shrinkage high-strength polyester industrial yarn is the modified polyester with the molecular chain including a terephthalic acid chain segment, an ethylene glycol chain segment and a diol chain segment having the branched chain, the fracture strength is more than or equal to 7.3 cN / dtex, and the dry heat shrinkage rates at the conditions comprising 177 DEG C, 10 min and 0.05 cN / dtex and the conditions comprising 190 DEG C, 15 min and 0.01 cN / dtex respectively are 1.8+ / -0.5% and 3.5+ / -0.5%.

Description

technical field [0001] The invention belongs to the field of fiber preparation, and relates to a low-shrinkage high-strength polyester industrial 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. It is widely used in the fields of fiber, bottle packaging, film and sheet, etc., with the advantages of good stiffness and good stiffness. The output is increasing year by year, and the industry status has been significantly improved. [0003] However,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/84D01F11/08C08G63/183D06M13/02D06M13/224D06M13/11D06M13/292D06M13/256D01D5/096D01D4/02D01D5/088D06M101/32
CPCC08G63/183D01D4/02D01D5/088D01D5/096D01F6/84D01F11/08D06M13/02D06M13/11D06M13/2243D06M13/256D06M13/292D06M2101/32
Inventor 赵慧荣杨大矛张元华李晓林
Owner JIANGSU HENGLI CHEM FIBER
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