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Method for preparing high-cohesive-force polyurethane elastic fibers

A technology of polyurethane elasticity and cohesion, which is applied in the field of polyurethane elastic fibers, which can solve the problems of limited improvement of cohesion of polyurethane elastic fibers, reduction of lubrication between tows, etc., to achieve strong viscosity and improve cohesion

Active Publication Date: 2016-01-13
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method reduces the lubrication between the tows by reducing the release agent in the polyurethane elastic fibers, thereby achieving the effect of improving the cohesion between the tows, but this method has a limited effect on improving the cohesion of the polyurethane elastic fibers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In the spinning dope, add low melting point substance ethylene-vinyl acetate copolymer, the melting point of which is 99°C, heat and solidify in the shaft to form filaments, and then twist the monofilaments into bundles. The spinning temperature in the shaft is 200-300 DEG C, and the addition amount of low melting point substance ethylene-vinyl acetate copolymer is 0.1%.

Embodiment 2

[0019] In the spinning dope, add low melting point substance ethylene-vinyl acetate copolymer, the melting point of which is 99°C, heat and solidify in the shaft to form filaments, and then twist the monofilaments into bundles. The spinning temperature in the tunnel is 200-300 DEG C, and the addition amount of low melting point substance ethylene-vinyl acetate copolymer is 0.5%.

Embodiment 3

[0021] In the spinning dope, add low-melting point polyolefin elastomer, whose melting point is 162°C, heat and solidify in the shaft to form filaments, and then twist the monofilaments into bundles. The spinning temperature in the tunnel is 200-300° C., and the addition amount of low melting point polyolefin elastomer is 2%.

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Abstract

The invention discloses a method for preparing high-cohesive-force polyurethane elastic fibers. The method includes the steps that low-melting-point substances are added into a spinning solution, then the mixture is heated to be solidified into yarns in channels, and then the yarns are twisted into bundles. The adding quantity of the low-melting-point substances is 0.1% to 30%, and the melting point of the low-melting-point substances is lower than the temperature in the spinning channels. The low-melting-point substances are any one kind of ethylene-vinyl acetate copolymers, polyolefin elastomers and thermoplastic polyurethane elastomers. According to the method for preparing the high-cohesive-force polyurethane elastic fibers, the low-melting-point substances are added into spandex, the mixture is melted at the high temperature to be stick, high stickiness is achieved, the effect of increasing cohesive force is achieved, and the cohesive force does not only depend on attraction force between the yarns.

Description

technical field [0001] The invention relates to a preparation method of high cohesion polyurethane elastic fibers, belonging to the technical field of polyurethane elastic fibers. Background technique [0002] At present, the application of polyurethane elastic fiber has been comprehensive and systematic from underwear to outerwear, from knitting to weaving, from sportswear to fashion clothing, from women's clothing to men's clothing, from ordinary fabrics to functional fabrics, and from the clothing industry to other industries. improvement. The force required to pull apart the monofilament in the spandex multifilament is called the cohesion force, and the cohesion force of the spandex is one of its important physical properties. If the cohesion force is poor, the spandex yarn structure is not tight, not resistant to friction, and its strength is reduced. It is easy to separate and break during the weaving process, and it is not resistant to use. After dyeing, it is easy t...

Claims

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Application Information

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IPC IPC(8): D01F6/94D01F1/10
Inventor 陈铃刘亚辉毛植森周志伟杨晓印
Owner ZHEJIANG HUAFENG SPANDEX
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