Melt direct-spinning polyester and polyester supersoft composite yarn and preparation method thereof

A technology of melt direct spinning and composite yarn, which is applied in the direction of conjugated synthetic polymer rayon, chemical post-treatment of synthetic polymer rayon, textiles and papermaking, etc., and can solve the problems of poor softness of PET fiber

Active Publication Date: 2018-04-03
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 overcome the problem of poor softness of PET fiber in the prior art, to provide a ki...

Method used

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  • Melt direct-spinning polyester and polyester supersoft composite yarn and preparation method thereof
  • Melt direct-spinning polyester and polyester supersoft composite yarn and preparation method thereof
  • Melt direct-spinning polyester and polyester supersoft composite yarn and preparation method thereof

Examples

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Effect test

Embodiment 1

[0079] A method for preparing melt direct spinning polyester supersoft composite yarn, the specific steps are as follows:

[0080] (1) Preparation of modified polyester:

[0081] (a) esterification reaction;

[0082] Prepare a slurry of terephthalic acid, ethylene glycol and hexanediol 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;

[0083] (b)...

Embodiment 2

[0091] A method for preparing melt direct spinning polyester supersoft composite yarn, the specific steps are as follows:

[0092] (1) Preparation of modified polyester:

[0093] (a) esterification reaction;

[0094] Make a slurry of terephthalic acid, ethylene glycol and hexanediol with a molar ratio of 1:1.4:0.05, add antimony acetate, titanium dioxide and trimethyl phosphite, mix evenly, and 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;

[0095] (b) polycondensat...

Embodiment 3

[0103] A method for preparing melt direct spinning polyester supersoft composite yarn, the specific steps are as follows:

[0104] (1) Preparation of modified polyester:

[0105] (a) esterification reaction; terephthalic acid, ethylene glycol and hexylene glycol 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...

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Abstract

The invention relates to a melt direct-spinning polyester and polyester supersoft composite yarn and a preparation method thereof. The preparation method comprises the following steps of firstly, respectively preparing modified polyester POY (polyester pre-oriented yarn) and modified polyester FDY (fully drawn yarn); then, combining strands of the modified polyester POY and the modified polyesterFDY into a network, heating and stretching, falsely twisting, thermally shaping, coiling and shaping, so as to obtain the melt direct-spinning polyester and polyester supersoft composite yarn. The preparation method has the advantages that in the preparation process of modified polyester POY and modified polyester FDY, the oil for oil applying contains crown ether, the content of crown ether is 67.30 to 85.58wt%, the distance of a slow cooling area is 80 to 120mm in the cooling process, and molecular chains of the modified polyester contain a terephthalic acid chain section, an ethylene glycolchain section and a hexanediol chain section. The prepared melt direct-spinning polyester and polyester supersoft composite yarn has the advantages that the initial modulus is less than or equal to 70cN/dtext; the method is simple and reasonable; the softness is realized, the appearance shaping is good, and the quality is high.

Description

technical field [0001] The invention belongs to the field of fiber preparation, and relates to a melt direct spinning polyester supersoft 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 crispness and other advantages, so polyester fiber is widely used in clothing and home textiles and other fields. [0003] Due to the small dielectric constant, low moisture regain and high friction coefficient of most PET fibers, spinning oil mus...

Claims

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Application Information

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IPC IPC(8): D01F8/14D01F11/08C08G63/183D06M13/02D06M13/224D06M13/11D06M13/256D06M13/292
CPCC08G63/183D01F8/14D01F11/08D06M13/02D06M13/11D06M13/2243D06M13/256D06M13/292
Inventor 尹立新邵义伟金管范王相明陈明潘光宇
Owner JIANGSU HENGLI CHEM FIBER
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