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

6 Cites 8 Cited by

AI-Extracted 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 eff...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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.

Application Domain

Monocomponent synthetic polymer artificial filamentArtifical filament manufacture

Technology Topic

PolyolefinYarn +8

Examples

Experimental program(5)
Comparison scheme(1)

Example Embodiment

[0016] Example 1:

[0017] In the spinning dope, add low-melting material ethylene-vinyl acetate copolymer with a melting point of 99°C, heat and solidify into filaments in the tunnel, and then twist the monofilaments into bundles. The spinning temperature in the tunnel is 200-300°C, and the added amount of the low-melting substance ethylene-vinyl acetate copolymer is 0.1%.

Example Embodiment

[0018] Example 2:

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

Example Embodiment

[0020] Example 3:

[0021] In the spinning dope, a low-melting material polyolefin elastomer with a melting point of 162°C is added, heated and solidified into filaments in a tunnel, and then the monofilaments are twisted into bundles. The spinning temperature in the tunnel is 200-300°C, and the addition amount of the low-melting substance polyolefin elastomer is 2%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

Login to view more

PUM

Property	Measurement	Unit
Melting point	<= 190.0	°C
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

Login to view more