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Porous PBT fiber HOY filament and preparation method thereof

A fiber and spinneret technology, used in fiber processing, melt spinning, spinneret assemblies, etc., can solve problems such as poor mechanical properties and uneven dyeing of PBT fibers

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

[0007] 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 HOY filament and its preparation method

Method used

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  • Porous PBT fiber HOY filament and preparation method thereof
  • Porous PBT fiber HOY filament and preparation method thereof
  • Porous PBT fiber HOY filament and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A preparation method of modified PBT 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 1,4-butanediol terephthalate:

[0065] After mixing terephthalic acid and 1,4-butanediol into a slurry, the esterification reaction is carried out. The esterification reaction...

Embodiment 2

[0070] A preparation method of modified PBT 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 1,4-butanediol terephthalate:

[0074] After mixing terephthalic acid and 1,4-butanediol into a slurry, the esterification reaction is carried out. The esterification reaction is carried ...

Embodiment 3

[0079] A preparation method of modified PBT 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 1,4-butanediol terephthalate:

[0083] After mixing terephthalic acid and 1,4-butanediol into a slurry, the esterification reaction is carried out. The esterification reaction is carrie...

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Abstract

The invention relates to a porous PBT fiber HOY filament and a preparation method thereof. The method comprises the following steps: spinning modified PBT polyester by adopting a porous spinneret, so as to obtain porous PBT fiber HOY filaments. The spinneret orifices on the porous spinneret are arranged in an elliptical shape, namely the centers of the spinneret orifices are positioned on concentric ellipses, the concentric ellipses are a series of ellipses, and both long axes and short axes of all the ellipses are collinear. The porous PBT fiber HOY filament is prepared by metering, squeezing, cooling, oiling and winding the modified PBT polyester, and the preparation method of the modified PBT polyester comprises the steps: carrying out a reaction between terephthalic acid and 1,4-butanediol to prepare 1,4-butanediol -terephthalate, adding diethyl terephthalate prepared by carrying out a reaction between terephthalic acid and a dihydric alcohol containing branched chains, and continuously carrying out the reaction to obtain the modified PBT polyester. The fiber disclosed by the invention is excellent in performance, the linear density deviation rate is less than or equal to 0.2%, the breaking strength CV value is less than or equal to 2.5%, and the breaking elongation CV value is less than or equal to 5.0%.

Description

Technical field [0001] The invention belongs to the field of PBT fibers, and relates to a porous PBT fiber HOY yarn 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. The properties such as constant strength and strength, as well as the softness and friction resistance of nylon, and its dyeability and coloring surpass that of polyester and nylon, it can be directly used for normal pressure boiling dyeing with dispersible fuel without a carrier. The biggest advantage of PBT fiber is that it has good resilience, good crimp elasticity, and extensibility close to spandex, both of which are higher than polyester. With the development of differentiated fibers in recent years, the use value of PBT as a fiber has gradually been affirmed...

Claims

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Application Information

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IPC IPC(8): D01F6/84C08G63/183C08G63/78D01D4/02D01D5/08D01D5/092
CPCC08G63/183C08G63/78D01D4/02D01D5/08D01D5/092D01F6/84
Inventor 范红卫王丽丽邵义伟温浩孙晓华金管范
Owner JIANGSU HENGLI CHEM FIBER
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