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Porous soft polyester fiber FDY yarn and preparing method thereof

A polyester fiber, soft technology, applied in the field of porous soft polyester fiber FDY 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 FDY filament and its preparation method

Method used

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  • Porous soft polyester fiber FDY yarn and preparing method thereof
  • Porous soft polyester fiber FDY yarn and preparing method thereof
  • Porous soft polyester fiber FDY yarn and preparing 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 a porous soft polyester fiber FDY yarn and a preparing method thereof. According to the invention, modified polyester employs a porous spinneret for spinning to prepare the porous soft polyester fiber FDY yarn; an arrangement mode of the spinneret holes on the porous spinneret is in an elliptical shape, the aperture center of the spinneret holes is positioned on concentric ellipses, the concentric ellipses are a series of ellipses, the long shafts of all ellipses are collinear, and the short shafts are collinear. the porous soft polyester fiber FDY yarn is prepared by metering modified polyester slices, extruding, cooling, oiling, stretching, thermoforming and reeling the material. A preparation method of the modified polyester comprises the following steps: terephthalic acid and glycol are subjected to a reaction to prepare ethylene glycol terephthalate, terephthalic acid and branched chain-containing hexanediol are subjected to a reaction to obtain the terephthalic acid glycol ester, and continuous reacting is carried out on the material to obtain the product. The yarn has excellent fiber performance, the linear density deviation ratio is less than or equal to 0.5%, the breaking tenacity CV value is less than or equal to 4.0%, breaking elongation CV value is less than or equal to 8.0%, and a yarn unevenness CV value is less than or equal to 2.0.

Description

technical field [0001] The invention belongs to the field of polyester fibers, and relates to a porous soft polyester fiber FDY 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): D01F6/84C08G63/183C08G63/78D01D4/02D01D5/08D01D5/253D01D5/24
CPCC08G63/183C08G63/78D01D4/02D01D5/08D01D5/24D01D5/253D01F6/84
Inventor 邓丽娜丁竹君李文刚王丽丽罗凯敏邵义伟
Owner JIANGSU HENGLI CHEM FIBER
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