Porous superfine denier polyester fiber and preparation method thereof

A polyester fiber and ultra-fine denier technology, applied in the field of polyester fiber, can solve the problems of poor mechanical properties, uneven dyeing of polyester fiber, etc., and achieve the effect of improving processing performance, improving dyeing performance, and good cooling effect

Active Publication Date: 2017-02-08
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 po

Method used

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  • Porous superfine denier polyester fiber and preparation method thereof
  • Porous superfine denier polyester fiber and preparation method thereof
  • Porous superfine denier polyester fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0062] Example 1

[0063] A kind of preparation method of modified polyester, specifically comprises the following steps:

[0064] (1) preparation of terephthalic acid glycol ester:

[0065] The molar ratio of terephthalic acid and 2-pentyl-1,3 propanediol is made into a slurry and added to the reactor. Under the catalysis of sulfuric acid, the 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. When the water distillate in the esterification reaction reaches 90% of the theoretical value is the end point of the esterification reaction to obtain diol terephthalate;

[0066] (2) preparation of ethylene terephthalate:

[0067] The molar ratio of terephthalic acid and ethylene glycol is made into a slurry and then added to the reactor to carry out the esterification reaction. The esterification reaction is pressurized in a nitrogen atmosphere. The...

Example Embodiment

[0071] Example 2

[0072] A kind of preparation method of modified polyester, specifically comprises the following steps:

[0073] (1) preparation of terephthalic acid glycol ester:

[0074] The molar ratio of terephthalic acid and 2-hexyl-1,3-propanediol is made into a slurry and added to the reactor. The concentration is 55wt%, and the amount of concentrated sulfuric acid added is 0.32% by weight of terephthalic acid. Under the catalysis of , the esterification reaction is carried out, and the esterification reaction is pressurized in a nitrogen atmosphere, the pressurized pressure is 0.13MPa, and the temperature is 181 ° C. When the water distillate in the esterification reaction reaches 91% of the theoretical value For the end point of the esterification reaction, diol terephthalate is obtained;

[0075] (2) preparation of ethylene terephthalate:

[0076] The terephthalic acid and ethylene glycol with a molar ratio of 1:1.3 are mixed into a slurry and added to the react...

Example Embodiment

[0080] Example 3

[0081] A kind of preparation method of modified polyester, specifically comprises the following steps:

[0082] (1) preparation of terephthalic acid glycol ester:

[0083] The molar ratio of terephthalic acid and 2-heptyl-1,3 propanediol is made into a slurry and added to the reactor. Under the catalysis of sulfuric acid, the esterification reaction is carried out. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pressure is 0.12MPa and the temperature is 183°C. When the water distillate in the esterification reaction reaches 92% of the theoretical value is the end point of the esterification reaction to obtain diol terephthalate;

[0084] (2) preparation of ethylene terephthalate:

[0085] The molar ratio is 1:1.31 terephthalic acid and ethylene glycol are mixed into slurry and added to the reactor to carry out esterification reaction. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized...

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Abstract

The invention relates to porous superfine denier polyester fiber and a preparation method thereof. Modified polyester undergoes spinning by a porous spinneret plate to prepare porous superfine denier polyester fiber. The arrangement mode of spinneret orifices on the porous spinneret plate is elliptical arrangement. That is to say, the centers of the spinneret orifices are positioned at concentric ellipses which are series ellipses. Long axis of all the ellipses is collinear, and minor axis is collinear. The porous superfine denier polyester fiber is prepared by metering of modified polyester chip, extrusion, cooling, oiling, cooling, oiling and high-speed winding. A preparation method of modified polyester comprises the following steps: letting terephthalic acid and glycol react to prepare ethylene glycol terephthalate, adding terephthalic acid and propylene glycol containing branched chain and reacting to prepare terephthalic dibasic alcohol ester, and continuously reacting to obtain modified polyester. The prepared fiber has excellent properties. Deviation ratio of linear density is less than or equal to 0.5%; breaking strength CV value is less than or equal to 4.0%; breaking elongation CV value is less than or equal to 8.0%; and yarn unevenness CV value is less than or equal to 2.0%.

Description

technical field [0001] The invention belongs to the field of polyester fibers, and relates to a porous superfine polyester fiber 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 resistance and light resistance, acid resistance, alkali resistance and corrosion resistance. It has a series of excellent performances, such as anti-wrinkle and non-ironing, and good crispness. It is widely used in clothing, home textiles and other fields. [0003] However, due to the high crystallinity and compact structure of PET, and there is no functional group combined with the dye on the molecular chain, it is difficult for the dye molecule to enter the fiber and dyeing is difficult. Can't satisfy people to bright-coloured beautiful, the fabric demand of unique style. [0004] The reason for ...

Claims

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Application Information

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IPC IPC(8): D01F6/84C08G63/16C08G63/183D01D4/02D01D5/253D01D5/24
CPCC08G63/16C08G63/183D01D4/02D01D5/24D01D5/253D01F6/84
Inventor 范红卫丁竹君王丽丽孙晓华史宁张烨
Owner JIANGSU HENGLI CHEM FIBER
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