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Preparation method of comfortable polyurethane elastic fiber

A polyurethane elasticity and comfort technology, applied in the field of polyurethane elastic fibers, can solve problems such as clogging of filters and oxidation, and achieve the effects of reducing modulus, wearing comfort, and improving softness

Active Publication Date: 2018-07-06
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is easy to be oxidized at high temperature due to the structure containing dihydroxy silicone oil, which will block the filter screen in the spinning shaft

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Add 4,4'-oxobis(benzenesulfonylsemicarbazide) to N,N-dimethylacetamide, and perform high-speed grinding in a ball mill to form a uniform and stable 4,4'-oxobis (Benzenesulfonylsemicarbazide) solution, the concentration of which is 25%, and the decomposition temperature of 4,4'-oxobis(benzenesulfonylsemicarbazide) is 210°C-220°C;

[0027] 2) Mixing polyether polyol and diisocyanate to prepare -NCO-terminated polyurethane prepolymer, adding N,N-dimethylacetamide to fully dissolve to obtain a prepolymer solution;

[0028] 3) Carrying out chain extension of the prepolymer solution and the diamine to obtain the polyurethane stock solution;

[0029] 4) Add 4,4'-oxobis(benzenesulfonylsemicarbazide) solution to the polyurethane stock solution, and the mass of 4,4'-oxobis(benzenesulfonylsemicarbazide) accounts for 0.08% of the solid content of the polyurethane stock solution , stir and mix evenly, then add other conventional additives, and obtain spinning dope after aging an...

Embodiment 2

[0035] 1) Add barium azodicarboxylate into N,N-dimethylformamide, and perform high-speed grinding in a ball mill to form a uniform and stable barium azodicarboxylate solution with a concentration of 30%. Barium azodicarboxylate The decomposition temperature is 240°C-250°C;

[0036] 2) Mixing polyether polyol and diisocyanate to prepare -NCO-terminated polyurethane prepolymer, adding N,N-dimethylformamide to fully dissolve to obtain a prepolymer solution;

[0037] 3) Carrying out chain extension of the prepolymer solution and the diamine to obtain the polyurethane stock solution;

[0038] 4) Add the barium azodicarboxylate solution to the polyurethane stock solution, the mass of the barium azodicarboxylate accounts for 0.28% of the solid content of the polyurethane stock solution, stir and mix evenly, then add other conventional additives, and obtain spinning after aging and defoaming stock solution;

[0039] 5) By means of a dry spinning system, the spinning stock solution i...

Embodiment 3

[0044] 1) Add trihydrazinotriazine to N,N-dimethylformamide, and perform high-speed grinding in a ball mill to form a uniform and stable trihydrazinotriazine solution with a concentration of 15%. Trihydrazinotriazine The decomposition temperature is 235°C-275°C;

[0045] 2) Mixing polyether polyol and diisocyanate to prepare -NCO-terminated polyurethane prepolymer, adding N,N-dimethylformamide to fully dissolve to obtain a prepolymer solution;

[0046] 3) Carrying out chain extension of the prepolymer solution and the diamine to obtain the polyurethane stock solution;

[0047] 4) Add the trihydrazinyl triazine solution to the polyurethane stock solution, the mass of trihydrazinyl triazine accounts for 0.45% of the solid content of the polyurethane stock solution, stir and mix evenly, then add other conventional auxiliary agents, and obtain spinning after aging and degassing stock solution;

[0048]5) By means of a dry spinning system, the spinning stock solution is heated an...

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Abstract

The invention discloses a preparation method of comfortable polyurethane elastic fiber. The preparation method of the comfortable polyurethane elastic fiber comprises the following steps: 1, mixing achemical foaming agent and an organic solvent to obtain chemical foaming agent dispersing liquid; 2, mixing polyether polyol and diisocyanate to prepare a -NCO end-capped polyurethane formic ester prepolymer, adding an organic solvent and completely dissolving to obtain a prepolymer solution; 3, performing chain extension on the prepolymer solution and diamine to obtain a polyurethane stock solution; 4, adding the chemical foaming agent dispersing liquid into the polyurethane stock solution, adding a spandex aid, curing and defoaming to obtain a spinning solution; and heating and curing the spinning solution in a high-temperature processional road by a wet spinning system to form tows and performing winding molding to obtain the comfortable polyurethane elastic fiber. The decomposition temperature of the selected chemical foaming agent is high, the softness and the air permeability of the polyurethane elastic fiber can be improved, the modulus of the polyurethane elastic fiber is reduced and the comfortable wearing effect is achieved.

Description

technical field [0001] The invention relates to the technical field of polyurethane elastic fibers, in particular to a preparation method of comfortable 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. When the ammonia-containing fabrics such as underwear, sportswear and tights are in contact with the human body, the requirements for the lamination of the fabric are relatively high, and the high-modulus elastic fibers will cause discomfort to the human body due to certain oppression. In addition, the poor air permeability of close-fitting clothing will also affect the wearing comfort of the fabric. [0003] In the prior art, there...

Claims

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Application Information

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IPC IPC(8): D01F6/94D01F1/10
CPCD01F1/10D01F6/94
Inventor 陈铃刘亚辉杨晓印周志伟
Owner ZHEJIANG HUAFENG SPANDEX
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