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Porous super-soft polyester fiber FDY and preparation method thereof

A polyester fiber, ultra-soft technology, applied in the field of polyester fiber, can solve the problems of uneven dyeing and poor mechanical properties of polyester fiber, and achieve the effect of improving dyeing performance, improving processing performance, and increasing the degree of diffusion

Active Publication Date: 2017-01-04
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 ultra-soft polyester fiber FDY filament and its preparation method

Method used

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  • Porous super-soft polyester fiber FDY and preparation method thereof
  • Porous super-soft polyester fiber FDY and preparation method thereof
  • Porous super-soft polyester fiber FDY 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-1,6 hexanediol 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 amount added 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 pres...

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-1,6-hexanediol 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] Put terephthalic acid and 2-heptyl-1,6 hexanediol in a molar ratio of 1:1.33 into a slurry 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 is...

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Abstract

The invention relates to a porous super-soft polyester fiber FDY and a preparation method thereof. The porous super-soft polyester fiber FDY is obtained by spinning modified polyester with a porous spinneret plate; spinneret pores in the porous spinneret plate are arranged in an oval shape, in other words, the centers of the spinneret pores are located on concentric ovals, and the concentric ovals are a series of ovals with the long axes collinear and the short axes collinear. The porous super-soft polyester fiber FDY is obtained by carrying out metering, extruding, cooling, oiling, stretching, heat setting and winding on modified polyester chips. The preparation method of modified polyester includes the steps that terephthalic acid and ethanediol react to obtain ethylene glycol terephthalate, dihydric alcohol terephthalate obtained after terephthalic acid and hexanediol containing branched chains react is added, the substances continue to react, and modified polyester is obtained. The fiber obtained with the method is good in performance, wherein the linear density deviation rate is smaller than or equal to 0.5%, the breaking strength CV value is smaller than or equal to 4.0%, the breaking elongation CV value is smaller than or equal to 8.0%, and the yarn unevenness CV is smaller than or equal to 2.0%.

Description

technical field [0001] The invention belongs to the field of polyester fibers, and relates to a porous supersoft 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] Th...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08G63/183D01D5/08D01D5/088D01D5/253
CPCC08G63/183D01D5/08D01D5/088D01D5/253D01F1/10D01F6/92
Inventor 范红卫王山水李文刚熊克杨超明张元华张烨
Owner JIANGSU HENGLI CHEM FIBER
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