Preparation method of polyurethane elastic fiber with moisture absorption and moisture liberation performance

A technology of polyurethane elasticity and polyurethane urea, which is applied in the field of polymer textile materials and its preparation, can solve problems such as difficulties in realization, and achieve the effects of changing the characteristics of hydrophobicity, degradable cost, and low cost

Active Publication Date: 2014-11-19
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of grafting and copolymerization needs to go through complex chemical reactions, which is difficult to realize

Method used

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  • Preparation method of polyurethane elastic fiber with moisture absorption and moisture liberation performance

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Experimental program
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Effect test

Embodiment 1

[0019] (1) Put 750 grams of polytetrahydrofuran ether glycol and 172 grams of diphenylmethane-4,4'diisocyanate in a reactor, and react at 86±2°C for 120 minutes to obtain an isocyanate group-terminated prepolymer, and then add 1.36Kg of dimethylacetamide dissolves the prepolymer to form a solution; then add 2.3 grams of 1,2-propylenediamine, 17 grams of ethylenediamine, and 0.3 grams of diethylamine to the prepolymer solution while stirring. The amine mixed solution formed in 713 grams of dimethylacetamide carries out chain extension reaction and chain termination reaction to obtain polyurethane urea stock solution;

[0020] (2) Grinding a mixture of 100 gram silk fibroin powder and 900 gram dimethylacetamide to make it into a uniform suspension;

[0021] (3) Measure polyurethane urea stock solution and silk fibroin suspension into a static mixer and mix evenly to form spandex blended spinning solution, wherein the weight ratio of silk fibroin powder to polyurethane urea polym...

Embodiment 2

[0024] The preparation process is the same as that in Example 1, except that step (3) controls the weight ratio of silk fibroin powder and polyurethane urea polymer to 10:90.

Embodiment 3

[0026] The preparation process is the same as that in Example 1, except that step (3) controls the weight ratio of silk fibroin powder and polyurethane urea polymer to 20:80.

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Abstract

The invention relates to a preparation method of a polyurethane elastic fiber with moisture absorption and moisture liberation performance. The method is as below: 1) successively conducting a prepolymerization reaction, a chain extension reaction and a chain termination reaction on raw materials of polytetramethylene ether glycol PTMG and diphenylmethane-4,4'diisocyanate 4,4'-MDI to obtain a polyurethane urea stoste; 2) grinding and dispersing a natural macromolecular fibroin powder in an organic solvent dimethylacetamide DMAC to obtain a fibroin suspension; 3) measuring and mixing the polyurethane urea stoste and fibroin suspension at the same time in a static mixer to form a spandex blended spinning solution; and 4) conducting spurting and filament stretching on the prepared spandex blended spinning solution by a dry method spinning system, and evaporating and drying the solvent, so as to obtain the polyurethane elastic fiber with moisture absorption and moisture liberation performance. Compared with conventional polyurethane elastic fiber, the product prepared by the invention has significantly improved moisture absorption and moisture liberation performance.

Description

technical field [0001] The invention relates to a method for preparing polyurethane elastic fibers with moisture absorption and release properties, and belongs to the technical field of polymer textile materials and their preparation. Background technique [0002] Spandex is a multi-block copolymer with alternating soft and hard segments. It has the advantages of good elastic recovery and high elongation at break. It can be used to manufacture various swimsuits, underwear, jeans, elastic webbing, etc. However, because spandex does not contain hydrophilic groups and has a smooth fiber surface, its hygroscopicity is poor, and its hydrophobicity limits its application in the textile field with high hygroscopicity requirements. [0003] Natural silk fibroin is derived from silk. It is a natural polymer, non-toxic, non-irritating, and has good biocompatibility and biodegradability. Clothes made of it are not only soft to the touch, but also comfortable to wear. At the same time,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/16D01F8/02C08G18/76C08G18/48
Inventor 薛士壮费长书王小华王靖钱锦梁红军席青
Owner ZHEJIANG HUAFENG SPANDEX
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