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Porous PBT fiber DTY (drawn textured yarn) and preparation method thereof

A fiber and spinneret technology, applied in the field of porous PBT fiber DTY yarn and its preparation, can solve the problems of poor mechanical properties, uneven dyeing of PBT fibers, etc.

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

[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 DTY silk and its preparation method

Method used

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  • Porous PBT fiber DTY (drawn textured yarn) and preparation method thereof
  • Porous PBT fiber DTY (drawn textured yarn) and preparation method thereof
  • Porous PBT fiber DTY (drawn textured yarn) and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] A preparation method of modified PBT polyester specifically includes the following steps:

[0067] (1) Preparation of glycol terephthalate:

[0068] 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;

[0069] (2) Preparation of 1,4-butanediol terephthalate:

[0070] After mixing terephthalic acid and 1,4-butanediol into a slurry, the esterification reaction is carried out. The esterification reaction...

Embodiment 2

[0075] A preparation method of modified PBT polyester specifically includes the following steps:

[0076] (1) Preparation of glycol terephthalate:

[0077] 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;

[0078] (2) Preparation of 1,4-butanediol terephthalate:

[0079] After mixing terephthalic acid and 1,4-butanediol into a slurry, the esterification reaction is carried out. The esterification reaction is carried ...

Embodiment 3

[0084] A preparation method of modified PBT polyester specifically includes the following steps:

[0085] (1) Preparation of glycol terephthalate:

[0086] 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;

[0087] (2) Preparation of 1,4-butanediol terephthalate:

[0088] 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 porous PBT fiber DTY (drawn textured yarn) and a preparation method thereof. The porous PBT fiber DTY is prepared from modified PBT through spinning by a porous spinneret plate; spinneret holes in the porous spinneret plate are arranged in an ellipse, that is, the centers of the spinneret holes are located on concentric ellipses which are a series of ellipses, major axes of the ellipses are collinear, and minor axes of the ellipses are collinear. The porous PBT fiber DTY is prepared from the modified PBT through metering, extruding, cooling, oiling and winding; a preparation method of the modified PBT comprises the following steps: terephthalic acid and 1,4-butanediol react to prepare butanediol 1,4-terephthalate, terephthalic acid and diol containing branched chains are added for a reaction, diol terephthalate is prepared and continuously subjected to a reaction, and modified PBT is obtained. The prepared DTY has excellent performance, the linear density deviation is lower than or equal to 0.2%, the breaking strength CV value is smaller than or equal to 2.5%, and the breaking elongation CV value is smaller 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 DTY 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): D01F6/92D01F1/10C08G63/183D01D5/08D01D5/088D01D5/096D01D5/253D01D5/24
CPCC08G63/183D01D5/08D01D5/088D01D5/096D01D5/24D01D5/253D01F1/10D01F6/92
Inventor 范红卫王山水史宁王力军王小雨晏金龙
Owner JIANGSU HENGLI CHEM FIBER
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