Preparation method of high-elasticity and easy-to-stick polyurethane-urea fibers

A polyurethane urea and easy-adhesive technology, which is applied in the preparation of highly elastic and easy-adhesive polyurethane urea fibers and the manufacture of new functionalized spandex, can solve the problems of being unable to have both high adhesiveness and high resilience, and achieve good Resilience performance, increased affinity, and excellent resilience effects

Active Publication Date: 2018-05-18
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technology of the present invention is to prepare easy-adhesive spandex by adding high-molecular-weight low-temperature softening polyurethane and tackifier to polyurethane urea, so as to solve the problem that existing easy-adhesive products cannot have both high adhesiveness and high resilience problem

Method used

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  • Preparation method of high-elasticity and easy-to-stick polyurethane-urea fibers
  • Preparation method of high-elasticity and easy-to-stick polyurethane-urea fibers

Examples

Experimental program
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Effect test

Embodiment 1

[0050] 1) Add polytetramethylene ether glycol with a number average molecular weight of 1810, 4,4'-diphenylmethane diisocyanate and N,N-dimethylacetamide into the reactor to form a 69% mass fraction of solution, and reacted at 45°C for 120 minutes to prepare a prepolymer. After the prepolymer is cooled to 8°C, chain extension reaction is carried out with a mixed amine solution of ethylenediamine and diethylamine having a mass fraction of 5.5%, wherein the molar ratio of ethylenediamine to diethylamine is 20 :1. According to the solid content of polyurethane urea elastic fiber, 0.5wt% of 2-(2'-hydroxyl-3', 5'-di-tert-butylphenyl)-benzotriazole), 0.5wt% of bis(N, Add N-dimethylhydrazideamino4-phenyl)methane, 0.18wt% magnesium stearate, and 0.3wt% titanium dioxide into the stock solution, and stir thoroughly to obtain polyurethaneurea stock solution A with a solid content of 35%.

[0051] 2) set the melt flow rate to 5cm 3 / 10min of low-temperature softening polyurethane, cell...

Embodiment 2

[0054] Spandex fiber is prepared according to the same method described in Example 1, the difference is that the low-temperature softening polyurethane melt flow rate is 15cm 3 / 10min.

Embodiment 3

[0056] Spandex fiber is prepared according to the same method described in Example 1, the difference is that the low-temperature softening polyurethane melt flow rate is 30cm 3 / 10min.

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Abstract

The invention relates to a preparation method of high-elasticity and easy-to-stick polyurethane-urea fibers. The method comprises steps as follows: 1), a polyurethane-urea dope A is prepared from polypolyols, diisocyanate and an amine chain extender in an organic solvent; 2), a polymer dope B is prepared from low-temperature softened polyurethane, a tackifier and the organic solvent through mixing; 3), the dope B is added to the dope A, the two dopes are mixed sufficiently and cured, a spinning dope is obtained, and the polyurethane-urea fibers are obtained with a dry spinning technology. Theprepared polyurethane fibers have good elastic recovery rate and excellent heat bonding performance. Therefore, fabric woven by the fibers not only has outstanding elasticity and touches compact, butalso has the characteristics of being runproof, anti-laddering, not prone to curling selvedge and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer material preparation, and specifically relates to a method for manufacturing novel functionalized spandex, in particular to a method for preparing highly elastic and easily bonded polyurethane urea fibers. Background technique [0002] Polyurethane urea elastic fiber (also known as spandex) is a chemical fiber with high elasticity. It has the advantages of high strength, light specific gravity, and high elastic recovery rate at room temperature, so it is widely used in underwear, stockings and other clothing fields. However, fabrics containing conventional spandex often cause problems such as curling, spinning and falling off due to cutting, repeated stretching, scratching, etc. In order to effectively solve these problems, the researchers developed a spandex product with adhesive properties. This kind of spandex can be melted and bonded under the condition of heat, so that the interweaving of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/16D01F8/02D01F1/10C08G18/10C08G18/48C08G18/66C08G18/76C08G18/32C08G18/28
CPCC08G18/10C08G18/4854C08G18/6685C08G18/7671D01F1/10D01F8/02D01F8/16C08G18/3228C08G18/287
Inventor 梁红军王靖许图远陈厚翔杨晓印
Owner ZHEJIANG HUAFENG SPANDEX
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