Porous soft polyester fiber POY and preparation method thereof

A polyester fiber, soft technology, applied in the field of porous soft polyester fiber POY yarn and its preparation, can solve the problems of poor mechanical properties, uneven dyeing of polyester fibers, etc., to improve processing performance, improve dyeing performance, reduce melting The effect of bulk viscosity

Active Publication Date: 2017-02-08
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 of uneven dyeing and poor mechanical properties of existing polyester fibers, realize large-scale production and spinning, and provide a porous and soft polyester fiber POY yarn and its preparation method

Method used

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  • Porous soft polyester fiber POY and preparation method thereof
  • Porous soft polyester fiber POY and preparation method thereof
  • Porous soft polyester fiber POY and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A preparation method of modified polyester, specifically comprising the following steps:

[0062] (1) Preparation of glycol terephthalate:

[0063] Add terephthalic acid and 2-pentyl-1,4-butanediol into a slurry with a molar ratio of 1:1.3 and add it to the reactor at a concentration of 50 wt%, and the addition amount is 0.3% of the weight of terephthalic acid Under the catalysis of concentrated sulfuric acid, the esterification reaction is carried out. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pressure is normal pressure and the temperature is 180°C. 90% is the end point of the esterification reaction to obtain diol terephthalate;

[0064] (2) Preparation of ethylene terephthalate:

[0065] Put terephthalic acid and ethylene glycol into a slurry with a molar ratio of 1:1.2 and put them into the reactor to carry out esterification reaction. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized p...

Embodiment 2

[0070] A preparation method of modified polyester, specifically comprising the following steps:

[0071] (1) Preparation of glycol terephthalate:

[0072] Put terephthalic acid and 2-hexyl-1,4-butanediol in a molar ratio of 1:1.38 into a slurry and add it to the reactor at a concentration of 55 wt%, and the addition amount is 0.32% of the weight of terephthalic acid Under the catalysis of concentrated sulfuric acid, esterification reaction is carried out. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pressure is 0.13 MPa and the temperature is 181 °C. % is the end point of the esterification reaction to obtain diol terephthalate;

[0073] (2) Preparation of ethylene terephthalate:

[0074] Put terephthalic acid and ethylene glycol into a slurry with a molar ratio of 1:1.3 and add them into the reactor to carry out esterification reaction. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pressure is 0....

Embodiment 3

[0079] A preparation method of modified polyester, specifically comprising the following steps:

[0080] (1) Preparation of glycol terephthalate:

[0081] Add terephthalic acid and 2-heptyl-1,4-butanediol into a slurry with a molar ratio of 1:1.33 and add it to the reactor at a concentration of 55 wt%, and the amount added is 0.33% of the weight of terephthalic acid Under the catalysis of concentrated sulfuric acid, the esterification reaction is carried out. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pressure is 0.12MPa and the temperature is 183°C. 92% is the end point of the esterification reaction to obtain diol terephthalate;

[0082] (2) Preparation of ethylene terephthalate:

[0083] Put terephthalic acid and ethylene glycol into a slurry with a molar ratio of 1:1.31 and put them into the reactor to carry out esterification reaction. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pressure ...

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Abstract

The invention relates to porous soft polyester fiber POY and a preparation method thereof. Modified polyester undergoes spinning by a porous spinneret plate to prepare porous soft polyester fiber POY. The arrangement mode of spinneret orifices on the porous spinneret plate is elliptical arrangement. That is to say, the centers of the spinneret orifices are positioned at concentric ellipses which are series ellipses. Long axis of all the ellipses is collinear, and minor axis is collinear. According to the porous soft polyester fiber POY, modified polyester undergoes grain-sized dicing to obtain modified polyester chip; and the modified polyester chip undergoes metering, extrusion, cooling, oiling and winding so as to prepare the product. A preparation method of the modified polyester comprises the following steps: letting terephthalic acid and glycol react to prepare ethylene glycol terephthalate, adding terephthalic acid and dihydric alcohol containing branched chain and reacting to prepare terephthalic dibasic alcohol ester, and continuously reacting to the modified polyester. The prepared fiber has excellent properties. Deviation ratio of linear density is less than or equal to 0.2%; breaking strength CV value is less than or equal to 2.5%; and breaking elongation CV value is less than or equal to 5.0%.

Description

technical field [0001] The invention belongs to the field of polyester fibers, and relates to a porous soft polyester fiber POY filament and a preparation method thereof. Background technique [0002] Since its inception, polyethylene terephthalate (PET fiber or polyester fiber) fiber has high breaking strength and elastic modulus, moderate resilience, excellent heat setting, good heat resistance and light resistance, acid resistance, alkali resistance and corrosion resistance. It has a series of excellent performances, such as anti-wrinkle and non-ironing, and good crispness. It is widely used in clothing, home textiles and other fields. [0003] However, due to the high crystallinity and compact structure of PET, and there is no functional group combined with the dye on the molecular chain, it is difficult for the dye molecule to enter the fiber and dyeing is difficult. Can't satisfy people to bright-coloured beautiful, the fabric demand of unique style. [0004] The rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/84C08G63/183C08G63/16D01D4/02D01D5/253D01D5/24
CPCC08G63/16C08G63/183D01D4/025D01D5/24D01D5/253D01F6/84
Inventor 范红卫尹立新晏金龙王丽丽杨超明邵义伟
Owner JIANGSU HENGLI CHEM FIBER
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