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Porous PBT fiber POY yarn and preparation method thereof

A fiber and spinneret technology, applied in fiber processing, melt spinning, filament/thread forming, etc., can solve the problems of uneven dyeing and poor mechanical properties of PBT fibers, so as to improve dyeing performance, improve processing performance, Effect of reducing melt viscosity

Active Publication Date: 2017-01-25
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of uneven dyeing and poor mechanical properties of existing PBT fibers, realize large-scale production and spinning, and provide a porous PBT fiber POY filament and its preparation method

Method used

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  • Porous PBT fiber POY yarn and preparation method thereof
  • Porous PBT fiber POY yarn and preparation method thereof
  • Porous PBT fiber POY yarn and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A preparation method of modified PBT polyester, specifically comprising the following steps:

[0060] (1) Preparation of glycol terephthalate:

[0061] Put terephthalic acid and 2-pentyl-1,3 propanediol with a molar ratio of 1:1.3 into a slurry 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 sulfuric acid, 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. Time is the end point of the esterification reaction to obtain diol terephthalate;

[0062] (2) Preparation of 1,4-butylene terephthalate:

[0063] After making terephthalic acid and 1,4-butanediol into slurry, carry out esterification reaction, the esterification reaction is carried out in a nitrogen atmosphere, the pressure is controlled at 0.6KPa, the temperature is 160 ° C, when the wa...

Embodiment 2

[0068] A preparation method of modified PBT polyester, specifically comprising the following steps:

[0069] (1) Preparation of glycol terephthalate:

[0070] Put terephthalic acid and 2-hexyl-1,3 propanediol with a molar ratio of 1:1.38 into a slurry and add to the reactor, at a concentration of 55wt%, add concentrated sulfuric acid in an amount of 0.32% of the weight of terephthalic acid Under the catalysis of the catalyst, the 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. For the end point of the esterification reaction, obtain diol terephthalate;

[0071] (2) Preparation of 1,4-butylene terephthalate:

[0072] After making terephthalic acid and 1,4-butanediol into slurry, carry out esterification reaction, the esterification reaction is carried out in a nitrogen atmosphere, the pressure is controlled at 0.6KPa, the temperature is 165 ° C, whe...

Embodiment 3

[0077] A preparation method of modified PBT polyester, specifically comprising the following steps:

[0078] (1) Preparation of glycol terephthalate:

[0079] Put terephthalic acid with a molar ratio of 1:1.33 and 2-heptyl-1,3 propanediol into a slurry and add it to the reactor. Under the catalysis of sulfuric acid, esterification reaction is carried out. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pressure is 0.12 MPa and the temperature is 183 ° C. When the amount of water distilled in the esterification reaction reaches 92% of the theoretical value Time is the end point of the esterification reaction to obtain diol terephthalate;

[0080] (2) Preparation of 1,4-butylene terephthalate:

[0081] After making terephthalic acid and 1,4-butanediol into slurry, carry out esterification reaction, the esterification reaction is carried out in a nitrogen atmosphere, the pressure is controlled at 0.6KPa, the temperature is at 170 ° C, when t...

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Abstract

The invention relates to porous PBT fiber POY yarn and a preparation method thereof. Modified PBT polyester is spun through a porous spinneret plate, so that the porous PBT fiber POY yarn is obtained; the arrangement mode of spinneret orifices on the porous spinneret plate adopts elliptic arrangement, that is, the centers of the spinneret orifices are positioned in concentric ellipses, the concentric ellipses adopt series ellipses, the long axes of all the ellipses are collinear, and the short axes of all the ellipses are also collinear. The porous PBT fiber POY yarn is formed by performing metering, extruding, cooling, oiling and coiling on the modified PBT polyester; the preparation method of the modified PBT polyester comprises the following steps: terephthalic acid and 1, 4-butanediol are reacted, so that terephthalic acid 1, 4-butylene terephthalate is obtained; terephthalic acid is added and reacted with dihydric alcohol containing branches, so that terephthalic acid dihydric alcohol ester is obtained; reaction is continued, so that the modified PBT polyester is obtained. The fiber prepared through the method is excellent in properties, the linear density variation rate is smaller than or equal to 0.2 percent, the breaking strength CV value is smaller than or equal to 2.5 percent, and the breaking elongation CV value is smaller than or equal to 5.0 percent.

Description

technical field [0001] The invention belongs to the field of PBT fibers, and relates to a porous PBT fiber POY filament and a preparation method thereof. Background technique [0002] The molecular structure of PBT fiber has both the same aromatic ring as polyester and the same longer methine segment as nylon. Therefore, it has the durability, dimensional stability, wrinkle resistance and moisture resistance of polyester. It has the properties of constant strength and strength, as well as the softness and friction resistance of nylon, and its dyeability and coloring exceed polyester and nylon, and it can be directly dyed at atmospheric pressure with disperse fuel without carrier. The biggest advantage of PBT fiber is that it has good resilience, its crimp elasticity is good, and its extensibility is close to that of spandex, both of which are higher than polyester. In recent years, with the development of differentiated fibers, the use value of PBT as a fiber has gradually ...

Claims

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Application Information

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IPC IPC(8): D01F6/84C08G63/183D01D5/247D01D5/08D01D5/253
CPCC08G63/183D01D5/08D01D5/247D01D5/253D01F6/84
Inventor 范红卫汤方明陈德伟杨超明张元华
Owner JIANGSU HENGLI CHEM FIBER
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