Soft polyester fiber and preparation method thereof

A polyester fiber and soft technology, applied in the field of soft polyester fiber and its preparation, can solve the problems of poor softness of polyester fiber, and achieve the effects of high volatilization point, excellent heat resistance stability and good softness

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

[0007] The purpose of the present invention is to provide a kind of soft polyester fiber with better softness and its preparation method in order to overcome the problem of poor softness of polyester fibers in the prior art

Method used

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  • Soft polyester fiber and preparation method thereof
  • Soft polyester fiber and preparation method thereof
  • Soft polyester fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A kind of preparation method of soft polyester fiber, concrete steps are as follows:

[0060] (1) Preparation of modified polyester:

[0061] (a) esterification reaction;

[0062] Prepare a slurry of terephthalic acid, ethylene glycol and adipic acid with a molar ratio of 1:1.2:0.03, add antimony trioxide, titanium dioxide and triphenyl phosphate and mix evenly, pressurize in a nitrogen atmosphere for esterification For the reaction, the pressurized pressure is normal pressure, and the temperature of the esterification reaction is 250°C. When the amount of water distilled out in the esterification reaction reaches 90% of the theoretical value, it is the end of the esterification reaction. The amount of antimony trioxide added 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 0.05% of the weight of terephthalic acid;

[0063] (b) polycondensation reaction; ...

Embodiment 2

[0069] A kind of preparation method of soft polyester fiber, concrete steps are as follows:

[0070] (1) Preparation of modified polyester:

[0071] (a) esterification reaction;

[0072] Make a slurry of terephthalic acid, ethylene glycol and adipic acid with a molar ratio of 1:1.4:0.05, add antimony acetate, titanium dioxide and trimethyl phosphite and mix evenly, then carry out esterification under pressure in a nitrogen atmosphere Reaction, pressurized pressure is 0.1MPa, the temperature of esterification reaction is 252 ℃, when the amount of water distilled in the esterification reaction reaches 92% of the theoretical value, it is the end of the esterification reaction, wherein the addition of antimony acetate is p-benzene 0.03% of the weight of diformic 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;

[0073] (b) polycondensation reaction;

[0074] A...

Embodiment 3

[0079] A kind of preparation method of soft polyester fiber, concrete steps are as follows:

[0080] (1) Preparation of modified polyester:

[0081] (a) esterification reaction; terephthalic acid, ethylene glycol and adipic acid with a molar ratio of 1:1.4:0.05 are made into a slurry, after adding antimony acetate, titanium dioxide and trimethyl phosphite and mixing uniformly, The esterification reaction is carried out under pressure in the atmosphere, the pressurized pressure is 0.1MPa, and 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 the end point of the esterification reaction, of which acetic acid The addition of antimony 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;

[0082] (b) polycondensat...

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Abstract

The invention relates to soft polyester fiber and a preparation method thereof. The preparation method comprises steps as follows: modified polyester is subjected to metering, extrusion, cooling, oiling, stretching, heat setting and winding, and the soft polyester fiber is prepared, wherein an oil agent for oiling contains 67.30wt%-85.58wt% of crown ether. The soft polyester fiber is prepared frommodified polyester with a molecular chain containing a terephthalic acid chain segment, an ethylene glycol chain segment and an adipic acid chain segment and has the initial modulus smaller than or equal to 80 cN/dtex, the fineness of 75-300 dtex, the breaking strength higher than or equal to 3.6 cN/dtex, the elongation at break of 45.0% plus or minus 3.0%, the breaking strength CV value smallerthan or equal to 5.0%, the breaking elongation CV value smaller than or equal to 10.0%, the boiling water shrinkage of 7.5% plus or minus 0.5% and the oil content of 0.90% plus or minus 0.20%. The preparation method is simple, and the acquired polyester fiber has better flexibility and very considerable application prospects.

Description

technical field [0001] The invention belongs to the field of fiber preparation, and relates to a soft polyester fiber and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET) is a polymer with excellent properties. PET is widely used in fibers, bottles because of its advantages such as high modulus, high strength, good shape retention and good barrier properties. In the fields of packaging, film and sheet materials, the output is increasing year by year, and the industry status has been significantly improved. [0003] Due to the small dielectric constant, low moisture regain and high friction coefficient of most PET fibers, spinning oil must be used in the spinning process. The main component of the oil agent is a surfactant, which can form a directional adsorption layer on the surface of the chemical fiber, that is, an oil film. On the one hand, the hydrophilic group of the oil film faces the space, which will absorb moisture in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/84D01F11/08C08G63/78C08G63/183D01D5/08D01D5/096D01D5/16
CPCC08G63/183C08G63/78D01D5/08D01D5/096D01D5/16D01F6/84D01F11/08
Inventor 李文刚刘灯胜杨超明张群窦弘
Owner JIANGSU HENGLI CHEM FIBER
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