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A kind of preparation method of high cohesion polyurethane elastic fiber

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: 2017-10-17
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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PUM

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Abstract

The invention discloses a method for preparing polyurethane elastic fiber with high cohesion force. A low-melting point substance is added to the spinning stock solution, then heated and solidified in a tunnel to form filaments, and then the monofilaments are twisted into bundles. The added amount of the low melting point substance is 0.1%-30%, wherein the melting point of the low melting point substance is lower than the temperature in the spinning tunnel. The low melting point substance is any one of ethylene-vinyl acetate copolymer, polyolefin elastomer, thermoplastic polyurethane elastomer. The invention provides a preparation method of high cohesion polyurethane elastic fiber, which is to use low-melting point substances to add to spandex, melt and become sticky at high temperature, have strong viscosity, and achieve the effect of improving cohesion, instead of relying only on silk between the adsorption force.

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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Patent Type & Authority Patents(China)
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