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A kind of polyester staple fiber and preparation method thereof

A polyester staple fiber and melt technology, which is applied in fiber processing, rayon manufacturing, fiber chemical characteristics, etc., can solve the problem that the thermal insulation performance of polyester staple fiber cannot well meet the thermal insulation requirements, and achieve good thermal insulation performance and improve thermal insulation. performance effect

Active Publication Date: 2022-01-18
福建经纬新纤科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, the thermal performance of polyester staple fiber does not meet the thermal requirements well

Method used

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  • A kind of polyester staple fiber and preparation method thereof

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[0021] A preparation method of polyester staple fiber, comprising the following steps:

[0022] (1) Mix 300 parts by weight of terephthalic acid and 50 parts by weight of ethylene glycol at 50-60°C; then heat up to 150-160°C for esterification, and the reaction time is 10-15min;

[0023] (2) Add 8-10 parts by weight of dimethylpropanediol, 5-10 parts by weight of 2,5-dimethyl-2,5-hexynediol, 5-15 parts by weight of the product after the esterification reaction Parts of 2-butene-1,4-di-n-butyl ester, 5-10 parts by weight of two (hexane-1,6-diol) titanium, 5-10 parts by weight of composite functional additives, 100 parts by weight of Terephthalic acid and 50 parts by weight of ethylene glycol ester, then heated up to 200-250°C, reacted for 10-15min under 200-300Pa vacuum conditions, and carried out the first polymerization reaction; then at 230-260°C and 250- React under 350Pa vacuum condition for 5-10min, carry out the second polymerization reaction, obtain copolyester melt; T...

Embodiment 1

[0038] Please refer to figure 1 , Embodiment 1 of the present invention is:

[0039] The preparation method of the polyester staple fiber of the present embodiment may further comprise the steps:

[0040] (1) Mix 300 parts by weight of terephthalic acid and 50 parts by weight of ethylene glycol at 55°C; then heat up to 155°C for esterification, and the reaction time is 12 minutes;

[0041] (2) Add 9 parts by weight of dimethylpropanediol, 8 parts by weight of 2,5-dimethyl-2,5-hexynediol, 10 parts by weight of 2-butene to the product after the esterification reaction -1,4-di-n-butyl ester, 8 parts by weight of two (hexane-1,6-diol) titanium, 8 parts by weight of composite functional additives, 100 parts by weight of terephthalic acid and 50 parts by weight of ethyl Glycol ester, then heated up to 230°C, reacted under 250Pa vacuum condition for 12min, and carried out the first polymerization reaction; then reacted at 240°C and 300Pa vacuum condition for 8min, carried out the s...

Embodiment 2

[0045] Please refer to figure 1 , the second embodiment of the present invention is:

[0046] The preparation method of the polyester staple fiber of the present embodiment may further comprise the steps:

[0047] (1) Mix 300 parts by weight of terephthalic acid and 50 parts by weight of ethylene glycol at 50°C; then heat up to 150°C for esterification, and the reaction time is 10 minutes;

[0048] (2) Add 8 parts by weight of dimethylpropanediol, 5 parts by weight of 2,5-dimethyl-2,5-hexynediol, 5 parts by weight of 2-butene to the product after the esterification reaction -1,4-di-n-butyl ester, 5 parts by weight of two (hexane-1,6-diol) titanium, 5 parts by weight of composite functional additives, 100 parts by weight of terephthalic acid and 50 parts by weight of ethyl Glycol ester, then heated up to 200°C, reacted under 200Pa vacuum condition for 10min, and carried out the first polymerization reaction; then reacted at 230°C and 250Pa vacuum condition for 5min, carried o...

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Abstract

The invention relates to a polyester staple fiber and a preparation method thereof. The preparation method of the polyester staple fiber comprises the following steps: (1) mixing terephthalic acid and ethylene glycol at 50-60°C; then heating up to 150 -160°C for esterification; (2) Add dimethylpropanediol, 5 2,5-dimethyl-2,5-hexynediol, 2-butene-1, 4-di-n-butyl ester, two (hexane-1,6-diol) titanium, composite functional additives, terephthalic acid and ethylene glycol ester, and then carry out the first polymerization reaction and the second polymerization reaction successively, Obtain copolyester melt; (3) copolyester melt is melt-spun; (4) melt is extruded through spinneret and cooled; Shaping and winding molding to obtain the polyester staple fiber. The polyester staple fiber obtained by the invention has the advantage of good thermal performance.

Description

technical field [0001] The invention relates to textile technology, in particular to a polyester staple fiber and a preparation method thereof. Background technique [0002] Polyester staple fiber is a fiber obtained by spinning polyester (that is, polyethylene terephthalate, PET for short, which is polymerized by PTA and MEG) and then cutting it into tow. PET is in the shape of rice grains or flakes, with various varieties and colors (usually the main component of the beverage bottles we come into contact with is polyester, slice it, and generally go through two main processes of pre-spinning and post-spinning to produce polyester staple fiber. According to different needs, polyester staple fibers of different specifications can be cut into after spinning, generally 4D-22D, and can be divided into two-dimensional and three-dimensional according to the crimp). 75% is used for polyester for chemical fiber, according to the requirements of the textile industry, to manufacture...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01F1/10D01D5/253C08G63/68C08G63/183
CPCD01D5/253D01F1/10D01F6/92C08G63/183C08G63/681
Inventor 林景
Owner 福建经纬新纤科技实业有限公司
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