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Preparation method of multi-micropore polyester fibers

A technology of polyester fibers and a manufacturing method, which is applied in the field of manufacturing microporous polyester fibers, can solve problems such as waste and environmental burden, and achieve the effect of uniform polyester and easy over-control.

Inactive Publication Date: 2020-06-30
江苏银兆新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similar patent publications can also be cited a lot, but no matter which method, its common point is that a polymer and / or other additives added must be dissolved out, which will inevitably cause unnecessary waste and return Additional burden on the environment, especially when acid or alkali treatment is required

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh an equal amount of dimethyl terephthalate and ethylene glycol into the reactor, and gradually heat up to 220-230°C under nitrogen protection. o C undergoes a transesterification reaction. After the transesterification reaction is completed, add successively the K that is equivalent to 8wt% of polyester total weight 3 Al(C 2 o 4 ) 3 , and an appropriate amount of antimony trioxide catalyst and triphenyl phosphate stabilizer, gradually warming up to 280 o C undergoes a polycondensation reaction. Gained polyester is sliced ​​and granulated, and polyester fibers are obtained through melt spinning, and the fiber density is 1.39g / cm 3 .

[0036] Above-mentioned gained fiber is placed in 140 o Take it out after heat treatment in hot water for 10 minutes, and the measured fiber density is 1.25g / cm 3 , with a porosity of 10%. The fiber is at 34 o C. The moisture regain rate in an environment with a relative humidity of 92% is 8%. And under the same condition, th...

Embodiment 2

[0038] Weigh an equal amount of terephthalic acid and ethylene glycol into the reactor, and gradually heat up to 220-230°C under nitrogen protection. o C undergoes an esterification reaction. After the esterification reaction has reached 90% of the theoretical value, sequentially add K equivalent to 4wt% of the total polyester weight 3 Al(C 2 o 4 ) 3 , and an appropriate amount of antimony trioxide catalyst and triphenyl phosphate stabilizer, gradually warming up to 280 o C undergoes a polycondensation reaction. Gained polyester is sliced ​​and granulated, and polyester fibers are obtained through melt spinning, and the fiber density is 1.39g / cm 3 .

[0039] Above-mentioned gained fiber is placed in 150 o Take it out after heat treatment in hot water for 10 minutes, and the measured fiber density is 1.28g / cm 3 , with a porosity of 8%. The fiber is at 34 o C. The moisture regain rate in an environment with a relative humidity of 92% is 5.5%. And under the same conditio...

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Abstract

The present invention discloses a preparation method of multi-micropore polyester fibers. According to the polyester fibers, esterification or ester exchange is performed on terephthalic acid and / or dicarboxylic terephthalate and dibasic alcohol monomers, and further polymerization is performed in the presence of double oxalate and a conventional polycondensation catalyst to prepare polyester. Theobtained polyester is subjected to slicing, granulating and melt spinning so as to prepare the polyester fibers. The obtained polyester fibers are treated with high-temperature hot water, so that thesurfaces and the interiors of the obtained fibers contain a large amount of through micropores, the fiber density is 1.15-1.30 g / cm<3>, and cloth prepared from the fibers has good moisture absorptionand air permeability.

Description

technical field [0001] The invention relates to the technical field of polyester fiber manufacturing, in particular to a method for manufacturing microporous polyester fibers. Background technique [0002] Polyester fiber has excellent physical and chemical properties and is widely used in textiles such as clothing. However, the surface of polyester fiber is hydrophobic, and its moisture absorption and air permeability are poor, causing the wearer to feel stuffy and poor in comfort. In order to improve the hygroscopicity and breathability of polyester fibers, people often change the internal and surface physical or chemical structures of polyester fibers through modification methods to obtain better performance and comfort. [0003] Microporosity is one of the modification methods to change the internal and surface structure of the fiber by physical methods, and then change some basic characteristics of the original fiber. Introducing pores inside and on the surface of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/10
CPCD01F1/10D01F6/92
Inventor 李革
Owner 江苏银兆新材料科技有限公司
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