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High-resilience coarse-denier spandex and preparation method thereof

A technology of high resilience coarse denier spandex and coarse denier spandex is applied to the preparation of high resilience coarse denier spandex and the field of high resilience coarse denier spandex, which can solve the problems of difficulty in controlling the storage stability of the stock solution, and achieve easy industrialization and implementation. The effect of easy promotion and low material cost

Inactive Publication Date: 2019-10-11
ZHENGZHOU ZHONGYUAN SPANDEX ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese published patent CN101469463B adds MDI to the prepolymer to increase the hard segment content and increase the physical crosslinking point to improve the resilience. Due to the high MDI content, the storage stability of the stock solution is difficult to control
Chinese published patent CN103757741B increases the physical crosslinking between hard segments by adding a special chain extender to enhance resilience, but there is also the problem of storage stability of the stock solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1: Prepolymer Preparation

[0028] 1) Mix raw materials polytetramethylene ether glycol 2000 and 4,4'-diphenylmethane diisocyanate, and react at 90°C for 100 minutes to prepare prepolymer A, in which 4,4'-diphenylmethane The mol ratio of diisocyanate and polytetramethylene ether glycol 2000 is 1.70:1;

[0029] 2) Mix the raw material polyethylene oxide diol 1200 with a mixture of 2,4'-diphenylmethane diisocyanate and 4,4'-diphenylmethane diisocyanate, wherein 2,4'-diphenylmethane The mass ratio of diisocyanate and 4,4'-diphenylmethane diisocyanate is 1:9, react at 90°C for 120 minutes, and prepare prepolymer B, wherein the molar ratio of isocyanate group to hydroxyl group is 2.00:1;

[0030] 3) Mix prepolymer A and prepolymer B uniformly to obtain prepolymer C, which is stored at 45° C. for future use, wherein the mass percentage of oligomer B in prepolymer C is 30%.

[0031] Step 2: Preparation of fiber-forming polymer

[0032] 1) Dissolve ethylenediamine, hydr...

Embodiment 2

[0041] Step 1: Prepolymer Preparation

[0042] 1) Mix the raw materials polytetramethylene ether glycol 1800 and 4,4'-diphenylmethane diisocyanate, and react at 90°C for 100 minutes to prepare prepolymer A, in which 4,4'-diphenylmethane The mol ratio of diisocyanate and polytetramethylene ether glycol 1800 is 1.70:1;

[0043] 2) Mix the raw material polyethylene oxide diol 1200 with a mixture of 2,4'-diphenylmethane diisocyanate and 4,4'-diphenylmethane diisocyanate, wherein 2,4'-diphenylmethane The mass ratio of diisocyanate and 4,4'-diphenylmethane diisocyanate is 1:9, react at 90°C for 120 minutes, and prepare prepolymer B, wherein the molar ratio of isocyanate group to hydroxyl group is 2.00:1;

[0044]3) Mix prepolymer A and prepolymer B uniformly to obtain prepolymer C, which is stored at 45° C. for future use, wherein the mass percentage of prepolymer B in prepolymer C is 40%.

[0045] Step 2: Preparation of fiber-forming polymer

[0046] 1) Dissolve ethylenediamine,...

Embodiment 3

[0055] Step 1: Prepolymer Preparation

[0056] 1) Mix the raw materials polytetramethylene ether glycol 1800 and 4,4'-diphenylmethane diisocyanate, and react at 90°C for 100 minutes to prepare prepolymer A, in which 4,4'-diphenylmethane The mol ratio of diisocyanate and polytetramethylene ether glycol 1800 is 1.70:1;

[0057] 2) Mix the raw material polyethylene oxide diol 1200 with a mixture of 2,4'-diphenylmethane diisocyanate and 4,4'-diphenylmethane diisocyanate, wherein 2,4'-diphenylmethane The mass ratio of diisocyanate and 4,4'-diphenylmethane diisocyanate is 1:9, react at 90°C for 120 minutes, and prepare prepolymer B, wherein the molar ratio of isocyanate group to hydroxyl group is 2.00:1;

[0058] 3) Mix prepolymer A and prepolymer B uniformly to obtain prepolymer C, which is stored at 45° C. for future use, wherein the mass percentage of oligomer B in prepolymer C is 50%.

[0059] Step 2: Preparation of fiber-forming polymer

[0060] 1) Dissolve ethylenediamine, ...

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Abstract

The invention provides a preparation method for a high-resilience coarse-denier spandex. The method comprises the following steps that (1) a prepolymer A and a prepolymer B are prepared separately andthen uniformly mixed, and a reaction is performed to obtain a prepolymer C; (2) a certain amount of a mixed diamine chain extender is added into a N,N-dimethylacetamide solution of the prepolymer C to form a polymer solution, and the A and the B are subjected to block copolymerized into a polyurethane-urea macromolecule; (3) a sizing agent is added into the polymer solution, and after aging, a spinning dope is obtained; (4) through dry spinning, a magnetic suspension type false twister is used for false twisting, and through an air cushion type yarn guide, the high-resilience coarse-denier spandex is formed. The preparation method of the high-resilience coarse-denier spandex satisfies requirements for the high-resilience coarse-denier spandex in some special fields.

Description

technical field [0001] The present invention relates to functional chemical fiber and its manufacturing method technology, specifically a preparation method technology of high-resilience coarse denier spandex. Made of high resilience coarse denier spandex. Background technique [0002] High-resilience coarse-denier spandex is generally used for webbing, cuffs, socks, etc. During use, it must ensure a good fit with the skin in order to make it more comfortable and beautiful to wear. This puts forward higher requirements for resilience, otherwise Deformation will occur, affecting consumers' self-confidence, and the market prospect is broad. [0003] The current technical route is mainly to increase physical cross-linking and chemical cross-linking. Chinese published patent CN103436983B improves the resilience of coarse denier spandex through the crosslinking reaction in the spinning and dyeing and finishing process. This resilience cannot be evenly distributed in the fabric,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D7/00D01D11/04D01D5/04D01F6/94D01F1/10
CPCD01D5/04D01D7/00D01D11/04D01F1/10D01F6/94
Inventor 乔建强马立伟荆建林崔跃伟
Owner ZHENGZHOU ZHONGYUAN SPANDEX ENG TECH
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