Porous polyester fiber FDY and preparation method thereof

A technology of porous polyester and fiber, applied in the field of polyester fiber, can solve the problems of uneven dyeing and poor mechanical properties of polyester fiber, and achieve the effects of improving dyeing performance, 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 polyester fiber FDY filament and its preparation method

Method used

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  • Porous polyester fiber FDY and preparation method thereof
  • Porous polyester fiber FDY and preparation method thereof
  • Porous polyester fiber FDY and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A method for preparing modified polyester specifically includes the following steps:

[0062] (1) Preparation of glycol terephthalate:

[0063] A slurry of terephthalic acid and 2-pentyl-1,3 propylene glycol with a molar ratio of 1:1.3 was added to the reactor at a concentration of 50% by weight, and the added amount was 0.3% by weight of terephthalic acid. Under the catalysis of sulfuric acid, the esterification reaction is carried out. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurization pressure is normal pressure and the temperature is 180°C. When the amount of water distilled in the esterification reaction reaches 90% of the theoretical value When is the end point of the esterification reaction, the glycol terephthalate is obtained;

[0064] (2) Preparation of ethylene terephthalate:

[0065] The terephthalic acid and ethylene glycol are prepared into a slurry with a molar ratio of 1:1.2 and then added to the reactor for esterification r...

Embodiment 2

[0070] A method for preparing modified polyester specifically includes the following steps:

[0071] (1) Preparation of glycol terephthalate:

[0072] A slurry of terephthalic acid and 2-hexyl-1,3 propylene glycol with a molar ratio of 1:1.38 was added to the reactor at a concentration of 55wt%, and the added amount of concentrated sulfuric acid was 0.32% by weight of terephthalic acid The esterification reaction is carried out under the catalyzed action of, the esterification reaction is pressurized in a nitrogen atmosphere, the pressure is 0.13MPa, the temperature is 181℃, when the amount of water distilled in the esterification reaction reaches 91% of the theoretical value It is the end point of the esterification reaction to obtain the glycol terephthalate ester;

[0073] (2) Preparation of ethylene terephthalate:

[0074] The molar ratio of 1:1.3 terephthalic acid and ethylene glycol was prepared into a slurry and then added to the reactor to carry out the esterification reactio...

Embodiment 3

[0079] A method for preparing modified polyester specifically includes the following steps:

[0080] (1) Preparation of glycol terephthalate:

[0081] The terephthalic acid with a molar ratio of 1:1.33 and 2-heptyl-1,3 propylene glycol were prepared into a slurry and added to the reactor at a concentration of 55wt%, and the added amount was 0.33% by weight of terephthalic acid. Under the catalysis of sulfuric acid, the esterification reaction is carried out. The esterification reaction is pressurized in a nitrogen atmosphere. The pressure is 0.12MPa and the temperature is 183℃. When the amount of water distilled in the esterification reaction reaches 92% of the theoretical value When is the end point of the esterification reaction, the glycol terephthalate is obtained;

[0082] (2) Preparation of ethylene terephthalate:

[0083] The molar ratio of 1:1.31 terephthalic acid and ethylene glycol were prepared into a slurry and then added to the reactor to carry out the esterification rea...

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Abstract

The invention relates to porous polyester fiber FDY and a preparation method thereof. The porous polyester fiber FDY is prepared by spinning modified polyester through a porous spinneret plate; spinneret holes formed in the spinneret plate are arranged in an oval shape, that is to say, hole centers of the spinneret holes are located on concentric ellipses which are series ellipses, the long axes of all the ellipses are collinear, and the short axes of all the ellipses are collinear. The porous polyester fiber FDY is prepared from modified polyester slices through metering, extruding, cooling, oiling, stretching, heat setting and winding; a preparation method of modified polyester comprises the steps that terephthalic acid reacts with ethylene glycol to obtain ethylene terephthalate, terephthalic acid dihydroxy alcohol ester which is prepared through a reaction of terephthalic acid and terephthalic acid containing is added, reacting is conducted continuously, and porous polyester is obtained. The fiber prepared through the method is excellent in performance, 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 polyester fiber FDY yarn 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 and light resistance, acid and alkali resistance, and corrosion resistance. It has a series of excellent properties such as durability, and the fabric has the advantages of anti-wrinkle, non-ironing, and good crispness. It is widely used in clothing, home textiles and other fields. [0003] However, due to the high crystallinity of PET, compact structure, and no functional groups combined with dyes on the molecular chain, it is difficult for dye molecules to enter the fiber and dyeing is difficult. It cannot meet people's needs for bright and beautiful fabrics with unique styles. [0004] The reason for the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92C08G63/183D01D5/247D01D5/08
CPCC08G63/183D01D5/08D01D5/247D01F6/92
Inventor 范红卫王丽丽丁竹君尹立新孙晓华张烨邵义伟
Owner JIANGSU HENGLI CHEM FIBER
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