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A Polyester Spinning Method for Reducing Extrusion Swelling Effect

A technology of extrusion swelling and polyester spinning, applied in the field of polyester spinning, can solve the problems of weakening the surface tension of extrusion swelling effect, poor shape retention effect of special-shaped fibers, etc.

Active Publication Date: 2020-06-05
JIANGSU HENGKE ADVANCED MATERIALS CO LTD
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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 overcome the poor shape retention effect of prior art preparation of special-shaped fibers, and to provide a polyester spinning method that weakens the extrusion swelling effect. The present invention introduces a small amount of rigid structural chains into polyester molecules Segments increase the rigidity of the polyester molecular chain. On the one hand, due to the low content of rigid structural segments, the excellent properties of the polyester body can be maintained. On the other hand, the increase in the rigidity of the polyester molecular chain can weaken the extrusion swelling effect and reduce Surface tension, and then prepare shaped fibers with better shape retention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A kind of polyester spinning method that weakens extrusion swelling effect, at first prepares modified polyester, and the steps are as follows:

[0053] (1) esterification makes dibasic acid glycol ester;

[0054] Prepare terephthalic acid, ethylene glycol and 2,6-naphthalene dicarboxylic acid into a slurry, the molar ratio of terephthalic acid, ethylene glycol and 2,6-naphthalene dicarboxylic acid is 1:1.2:0.02, add di After antimony and triphenyl phosphate are mixed evenly, carry out esterification reaction, the addition amount of antimony trioxide is 0.01% of the weight of terephthalic acid, the addition amount of triphenyl phosphate is 0.01% of the weight of terephthalic acid, the esterification reaction Pressurized reaction in a nitrogen atmosphere, the pressurized pressure is 0.1MPa, the temperature of the esterification reaction is 250 ° C, when the amount of water distilled in the esterification reaction reaches 90% of the theoretical value, it is the end of the...

Embodiment 2

[0062] A kind of polyester spinning method that weakens extrusion swelling effect, at first prepares modified polyester, and the steps are as follows:

[0063] (1) esterification makes dibasic acid glycol ester;

[0064] The diterephthalate of terephthalic acid, ethylene glycol and bisphenol A is made into slurry, and the mol ratio of the diterephthalate of terephthalic acid, ethylene glycol and bisphenol A is 1: 1.3:0.025, after adding antimony trioxide and triphenyl phosphate and mixing evenly, carry out esterification reaction, the addition of antimony trioxide is 0.015% of the weight of terephthalic acid, and the addition of triphenyl phosphate is 0.015% of the weight of terephthalic acid 0.015% by weight, the esterification reaction is pressurized in a nitrogen atmosphere, the pressurized pressure is 0.12MPa, and the temperature of the esterification reaction is 251 ° C. When the water distillation in the esterification reaction reaches 90% of the theoretical value, it is...

Embodiment 3

[0072] A kind of polyester spinning method that weakens extrusion swelling effect, at first prepares modified polyester, and the steps are as follows:

[0073] (1) esterification makes dibasic acid glycol ester;

[0074] Prepare terephthalic acid, ethylene glycol and 1,4-cyclohexanedimethanol into a slurry, and the molar ratio of terephthalic acid, ethylene glycol and 1,4-cyclohexanedimethanol is 1:1.4:0.03, After adding antimony trioxide and triphenyl phosphate and mixing evenly, carry out esterification reaction, the addition of antimony trioxide is 0.02% of the weight of terephthalic acid, and the addition of triphenyl phosphate is 0.02% of the weight of terephthalic acid , the esterification reaction is pressurized in a nitrogen atmosphere, the pressurized pressure is 0.14MPa, the temperature of the esterification reaction is 252°C, and the end of the esterification reaction is when the amount of water distilled out in the esterification reaction reaches 90% of the theoret...

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Abstract

The invention belongs to the field of polyester spinning, and relates to a polyester spinning method capable of weakening extrusion swelling effect. The spinning polyester is modified polyester; a molecular chain of the modified polyester comprises a terephthalic acid chain segment, an ethylene glycol chain segment and a rigid structure chain segment; the rigid structure chain segment is a 2,6-naphthalic acid chain segment, a bisphenol A chain segment, a 1,4-cyclohexanedimethanol chain segment, a 2,2,-biphenyldicarboxylic acid chain segment, a 4,4-oxydibenzoic acid chain segment, a 2,4-biphenyldicarboxylic acid chain segment, a 3,4-biphenyldicarboxylic acid chain segment, a 4,4,-biphenyldicarboxylic acid chain segment or a p-hydroxybenzoic acid chain segment; the molar ratio of the rigid structure chain segment to the terephthalic acid chain segment is (0.02 to 0.05) to 1; the extrusion swelling ratio of a modified polyester melt is 1.25 to 1.35. The method provided by the invention has the advantages that the extrusion swelling effect during extrusion of the polyester melt is effectively weakened, and the profiled fiber with good shape preserving effect is favorably prepared.

Description

technical field [0001] The invention belongs to the field of polyester spinning, and relates to a polyester spinning method for weakening extrusion swelling effect, in particular to a polyester spinning method for weakening extrusion swelling effect for preparing special-shaped fibers. Background technique [0002] Polyethylene terephthalate fiber (PET fiber or polyester fiber) has a series of high breaking strength and elastic modulus, moderate resilience, excellent heat setting, good heat resistance and light resistance, acid resistance, alkali resistance and corrosion resistance. Excellent performance, and the fabric has the advantages of anti-wrinkle, non-ironing, good crispness, etc., and is widely used in clothing, home textiles and other fields. However, polyethylene terephthalate fibers also have disadvantages such as poor hygroscopicity, non-absorbent fabric, stuffy feeling when worn, and difficult coloring, which greatly restricts the application and development of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/84D01D5/24C08G63/185C08G63/189C08G63/195C08G63/199C08G63/60C08G63/672C08G63/86
CPCC08G63/185C08G63/189C08G63/195C08G63/199C08G63/605C08G63/672C08G63/866D01D5/24D01F6/84
Inventor 柳敦雷李文刚陆佳颖
Owner JIANGSU HENGKE ADVANCED MATERIALS CO LTD
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