Polyester fiber with moisture absorption/desorption performance and preparation method thereof

A polyester fiber, moisture absorption and release technology, applied in the field of hygroscopic polyester fiber and its preparation, can solve the problems of increased thermal shrinkage and difficulty in use, and achieves good light fastness, good color tone, excellent absorption and release. The effect of wet performance

Inactive Publication Date: 2016-07-20
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no solution has been proposed for the problem that the thermal shrinkage rate caused by the use of low-melting point polymers becomes large and it is difficult to use in practical applications.

Method used

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  • Polyester fiber with moisture absorption/desorption performance and preparation method thereof
  • Polyester fiber with moisture absorption/desorption performance and preparation method thereof
  • Polyester fiber with moisture absorption/desorption performance and preparation method thereof

Examples

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preparation example Construction

[0043] The present invention also relates to a method for preparing the above-mentioned polyester fiber. In the method, the polyester and poly(N-vinyl lactam) are firstly mixed in a weight ratio of 95:5 to 60:40, and the screw length-to-diameter ratio L / D is used. Melt and knead in a twin-screw extruder above 40 to obtain a masterbatch polymer.

[0044] Poly N-vinyllactam with an average dispersion diameter of less than 500nm can be well complexed with polyester fibers, thereby inhibiting the dissolution of poly N-vinyllactam and preventing polyester fibers from The hygroscopicity of the polyester fiber is reduced, and the moisture absorption durability of the polyester fiber is improved. In the present invention, it is preferable that the average dispersion diameter of the poly-N-vinyllactam is not more than 300 nm, more preferably not more than 150 nm.

[0045] In order to keep the average dispersion diameter of poly-N-vinyllactam below 500 nm, the twin-screw extruder used ...

manufacture example 1

[0080] [Manufacturing example 1]

[0081] 784 g of ethylene glycol and 1,324 g of terephthalic acid were subjected to esterification reaction, followed by polycondensation reaction. First, put all the terephthalic acid, 533g of ethylene glycol, and 0.88g of tetrabutyl titanate into the reactor with a rectification tower, and start the esterification reaction at a temperature of 250°C and a vacuum of 400mmHg. While slowly raising the temperature, the residual ethylene glycol was added continuously. Then move to polycondensation reaction tank, carry out polymerization reaction under vacuum condition and temperature 285 ℃.

manufacture example 2

[0082] [Production Example 2]

[0083] Ethylene glycol 784g? Terephthalic acid 993g? Isophthalic acid 331g, sodium stearate nucleating agent for esterification reaction, followed by polycondensation reaction? First all the terephthalic acid and isophthalic acid , Sodium-based nucleating agent? Ethylene glycol 533g? Calcium acetate 1.2g? Tetrabutyl titanate 0.88g into the reactor with a rectification tower, the temperature was raised from 130°C to 235°C for 3 hours, and then moved to polycondensation In the reactor, the temperature was raised from 240°C to 285°C under vacuum for post-condensation reaction for 4 hours?

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Abstract

The invention discloses polyester fiber with moisture absorption / desorption performance and a preparation method thereof. The polyester fiber contains polyester with melting point being 200-240 DEG C, poly(N-vinyl lactam), a phosphorous heat stabilizer and a sodium nucleating agent, wherein poly(N-vinyl lactam) accounts for 3-15 wt% of weight of polyester fiber; weighed according to P element, the phosphorous heat stabilizer accounts for 50-500 ppm of weight of polyester fiber; weighed according to Na element, the odium nucleating agent accounts for 10-100 ppm of weight of polyester fiber; and content of antimony element in the polyester fiber is below 5 ppm. By adding a moisture absorption component, the phosphorous heat stabilizer and the sodium nucleating agent into polyester, the moisture-absorption polyester fiber which can be applied to materials for clothing such as underwear, sport suit and the like is obtained.

Description

technical field [0001] The invention relates to a hygroscopic polyester fiber and a preparation method thereof. Specifically, by adding a hygroscopic component, a phosphorus-based heat stabilizer, and a sodium nucleating agent to polyester, a hygroscopic polyester fiber that can be applied to clothing materials such as underwear and sportswear is obtained. Background technique [0002] Polyester fiber is a typical thermoplastic synthetic fiber. Since its birth, it has been widely used in clothing and industry due to its excellent mechanical strength, chemical resistance, and heat resistance. [0003] However, the moisture absorption and desorption properties of polyester fibers are extremely low, and sweat cannot be released in time. When they are directly in contact with the skin or worn close to the skin, they will feel sticky, thus limiting the development of polyester fibers in the use of underwear. [0004] The methods to improve the hygroscopicity of polyester fibers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01F8/10D01F1/10D01D5/08
Inventor 范志恒吴亚薇望月克彦
Owner TORAY FIBER RES INST(CHINA) CO LTD
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