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Preparation method of polyurethane urea elastic fibers with high thermal setting efficiency

A polyurethane urea and elastic fiber technology, which is used in the manufacture of spandex fiber and the manufacture of new functional spandex fiber, can solve the problems of the negative impact of fiber modulus and elasticity, reduce energy consumption, improve shaping efficiency, and improve production. The effect of efficiency

Active Publication Date: 2019-04-12
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the heat setting efficiency of polyurethane urea elastic fibers prepared by these methods has been improved to a certain extent, the negative impact on fiber modulus and elasticity is also relatively large.

Method used

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  • Preparation method of polyurethane urea elastic fibers with high thermal setting efficiency
  • Preparation method of polyurethane urea elastic fibers with high thermal setting efficiency
  • Preparation method of polyurethane urea elastic fibers with high thermal setting efficiency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1) Mix polytetramethylene ether glycol and 4,4'-diphenylmethane diisocyanate and react at 90°C for 120 minutes to prepare a prepolymer, in which 4,4'-diphenylmethane diisocyanate and poly The molar ratio of tetramethylene ether glycol is 1.70:1;

[0048] 2) Dissolve ethylenediamine and propylenediamine in a molar ratio of 4:1 into the solvent N,N-dimethylacetamide, and then add diethylamine with a diamine molar content of 15% to form a concentration of 6.00% by mass The mixed amine solution; then the mixed amine solution is added to the prepolymer solution and stirred, wherein the molar ratio of the amine group to the isocyanate group is 1.05:1, and the reaction is carried out to prepare the secondary polymerization stock solution ;

[0049]3) 0.5wt% of 2-(2'-hydroxyl-3',5'-di-tert-butylphenyl)-benzotriazole), 0.5wt% of bis(N,N-dimethylhydrazide Amino 4-phenyl)methane, 0.1wt% magnesium stearate, 0.5wt% titanium dioxide were added to N,N-dimethylacetamide and ground fo...

Embodiment 2

[0053] 20D polyurethaneurea elastic fibers having high heat-setting efficiency were obtained in the same manner as described in Example 1 except that the content of polymethylmethacrylate was 5 wt%.

Embodiment 3

[0055] 20D polyurethaneurea elastic fibers having high heat-setting efficiency were obtained in the same manner as described in Example 1 except that the polymethyl methacrylate content was 15 wt%.

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Abstract

The invention relates to a preparation method of polyurethane urea elastic fibers with high thermal setting efficiency. The preparation method comprises the following steps: 1) mixing dihydric alcoholwith excessive diisocyanate to prepare a prepolymer, that is, primary polymerization; then dissolving the prepolymer in an organic solvent and subsequently adding a chain extender and a chain terminator into the organic solvent for secondary polymerization to obtain a secondary polymerization raw liquid; finally, adding an anti-ultraviolet agent, an antioxidant, a lubricant and a delustering agent into the secondary polymerization raw liquid to obtain a polyurethane urea raw liquid; 2) preparing a setting improving auxiliary agent solution; 3) adding the setting improving auxiliary agent solution into the polyurethane urea raw liquid to be mixed to obtain a polyurethane urea spinning solution, stirring and curing the solution for 20-40 hours, and carrying out dry-method spinning to prepare the polyurethane urea elastic fibers with high thermal setting efficiency. The polyurethane urea elastic fibers with high thermal setting efficiency have excellent thermal setting efficiency and good hand feeling, and a fabric prepared from the fibers is free of a crimping phenomenon.

Description

technical field [0001] The invention relates to a method for manufacturing novel functionalized spandex fibers, in particular to a method for manufacturing spandex fibers with excellent shape setting, and belongs to the technical field of polymer material preparation. Background technique [0002] Polyurethane urea elastic fiber is a highly elastic chemical fiber, its elongation at break is 500% to 700%, the elastic recovery rate is generally greater than 90%, and its breaking strength is high. Therefore, spandex fiber is widely used in various fields. With the continuous expansion of its use, customers have higher and higher requirements for polyurethane urea elastic fiber. [0003] Generally speaking, due to the high heat setting temperature of polyurethane urea elastic fiber (about 190°C), heat-sensitive nylon, cotton, silk, wool and other fibers will be thermally embrittled during the post-weaving process, resulting in poor hand feeling. . In order to prevent these pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F1/10
CPCD01F1/10D01F6/94
Inventor 王靖梁红军杨晓印许图远陈厚翔蒋署毛兴树
Owner ZHEJIANG HUAFENG SPANDEX
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