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Nylon mixed composition with improved moisture absorption rate and shrinkage rate, nylon-based fiber prepared therefrom, and production method thereof

A technology of shrinkage rate and moisture absorption rate, which is applied in the direction of melt spinning, one-component polyamide rayon, one-component copolyamide rayon, etc., can solve the problems of poor heat resistance in spinning processing, and achieve Excellent spinning processability, uniform fiber cross-section, and excellent shape stability

Active Publication Date: 2018-07-27
GS CALTEX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the structure of this nylon 4, since the number of lipophilic carbon atoms per repeating unit is small, it has the advantages of excellent moisture absorption and excellent strength. Therefore, it appeared in 1973 as an ideal fiber that can replace cotton, but there are The following technical problem: the melting point is 265°C, but the thermal decomposition temperature is 260°C, so the heat resistance of spinning processing is extremely poor

Method used

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  • Nylon mixed composition with improved moisture absorption rate and shrinkage rate, nylon-based fiber prepared therefrom, and production method thereof
  • Nylon mixed composition with improved moisture absorption rate and shrinkage rate, nylon-based fiber prepared therefrom, and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Preparation of resin (nylon 4,6 resin) polymerized from 2-pyrrolidone and ε-caprolactam

[0050] 25.5 g of 2-pyrrolidone and 79.1 g of ε-caprolactam as monomers, 8.4 g of potassium hydroxide (KOH) as basic catalyst, 1.76 g of CO 2 An initiator and 0.32 g of 1,6-hexamethylene diisocyanate (1,6-hexamethylene diisocyanate) as an isocyanate compound were anionically polymerized to prepare a nylon 4,6 copolymer. 2-Pyrrolidone and ε-caprolactam as unreacted monomers in the nylon 4,6 copolymer and potassium hydroxide as a basic catalyst were purified with water. The pH is controlled by removing K+ by ion exchange resulting in purified water. The pH-controlled water was concentrated through a reverse osmosis membrane and distillation to recover 2-pyrrolidone and ε-caprolactam as unreacted monomers to finally prepare a nylon 4,6 resin (Mw=140 kg / mol).

[0051] (2) Preparation of nylon mixed composition

[0052] Mix 4.75kg of nylon 4,6 resin and 0.25kg of nylon 6 resin (KN...

Embodiment 2

[0055] It was the same as Example 1 except that 4 kg of nylon 4,6 resin and 1 kg of nylon 6 resin were mixed.

Embodiment 3

[0057] It was the same as Example 1 except that 3.5 kg of nylon 4,6 resin and 1.5 kg of nylon 6 resin were mixed.

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Abstract

The present invention relates to a nylon mixed composition for fiber production with improved moisture absorption and shrinkage, and nylon-based fibers prepared from the nylon mixture with improved moisture absorption and shrinkage, and to nylon fibers with improved moisture absorption and shrinkage. The nylon mixed composition for fiber preparation comprises: 70% to 95% by weight of resin polymerized from 2-pyrrolidone and lactam with 5 to 7 carbon atoms; and 5% to 30% by weight of nylon 6 resin.

Description

technical field [0001] The present invention relates to a nylon mixed composition with improved moisture absorption rate and shrinkage rate, a nylon-like fiber prepared therefrom and a preparation method thereof. Background technique [0002] Generally, nylon 6 has excellent properties such as strength, elastic recovery rate, and dyeability, but most synthetic fibers including nylon 6 have a disadvantage of low moisture absorption. Cotton, which is a natural fiber, has excellent moisture absorption and has a good touch compared to conventional synthetic fibers, but it cannot be processed into microfibers to express excellent touch, and it lacks ultraviolet (UV) protection and is expensive. There is thus a need for innovative nylon synthetic fibers that replace cotton. [0003] Those who study synthetic fibers have been researching new synthetic fibers repeatedly, so that while maintaining the advantages of conventional synthetic fibers, the advantages of high moisture absor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/90C08L77/02D01D5/08
CPCC08L77/02C08G69/18C08G69/24D01F6/80D01F6/90
Inventor 玄栋勋李垂贞
Owner GS CALTEX CORP