Preparation method of anti-skid elastic spandex core-spun yarn suitable for jean fabric

A technology of spandex core-spun yarn and denim fabric, which is applied in the preparation of anti-slip elastic spandex core-spun yarn and the field of preparation of anti-slip elastic spandex core-spun yarn. Effect of Hysteresis Area

Active Publication Date: 2021-01-12
ZHENGZHOU ZHONGYUAN SPANDEX ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods all add additional wrapping steps, or require the use of special processing equipment, which makes the process more complicated, and cannot fundamentally solve the problem of spandex slippage

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Preparation method of anti-skid elastic spandex core-spun yarn suitable for jean fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1: Prepolymer Preparation

[0034] 1) Mix the raw materials polytetramethylene ether glycol PTMG 2000 and 4,4'-diphenylmethane diisocyanate, and react at 80°C for 100 minutes to prepare an isocyanate group-terminated prepolymer, in which 4,4'- The mol ratio of diphenylmethane diisocyanate and polytetramethylene ether glycol 2000 is 1.70:1;

[0035] 2) After the prepolymer is cooled to 45° C., N,N-dimethylacetamide solution is added and mixed evenly by sufficient stirring to prepare a solution with a concentration of 35% by mass.

[0036] The second step: the preparation of polyurethane urea

[0037] 2) Dissolving ethylenediamine and diethylamine into the solvent N,N-dimethylacetamide to form a mixed amine solution with a concentration of 7.00% by mass;

[0038] 3) Add the prepared mixed amine solution to the N,N-dimethylacetamide solution of the prepolymer and stir rapidly to react to form a polyurethane solution with a concentration of 35% by mass, wherein the a...

Embodiment 2

[0047] Step 1: Prepolymer Preparation

[0048] 1) Mix the raw material polytetramethylene ether glycol PTMG 1800 with 4,4'-diphenylmethane diisocyanate and 2,4'-diphenylmethane diisocyanate, and react at 90°C for 120 minutes to prepare the isocyanate group Blocked prepolymer in which the mass ratio of 2,4'-diphenylmethane diisocyanate to 4,4'-diphenylmethane diisocyanate is 1:9 and the molar ratio of isocyanate groups to hydroxyl groups is 2.00:1 ;

[0049] 2) After cooling the prepolymer to 45° C., add N,N-dimethylacetamide solution, stir and mix evenly to prepare a solution with a concentration of 40% by mass.

[0050] The second step: the preparation of polyurethane urea

[0051] 2) dissolving ethylenediamine, butylenediamine, and diethylamine into the solvent N,N-dimethylacetamide to form a mixed amine solution with a concentration of 7.00% by mass;

[0052] 3) Add the prepared mixed amine solution to the N,N-dimethylacetamide solution of the prepolymer and stir rapidly...

Embodiment 3

[0061] Step 1: Prepolymer Preparation

[0062] 1) Mix the raw materials polytetramethylene ether glycol PTMG 2000 and 4,4'-diphenylmethane diisocyanate, and react at 90°C for 100 minutes to prepare an isocyanate group-terminated prepolymer, in which 4,4'- The mol ratio of diphenylmethane diisocyanate and polytetramethylene ether glycol 2000 is 1.50:1;

[0063] 2) After cooling the prepolymer to 45° C., add N,N-dimethylacetamide solution, stir and mix evenly to prepare a solution with a concentration of 40% by mass.

[0064] The second step: the preparation of polyurethane urea

[0065] 2) dissolving ethylenediamine, butylenediamine, diethylamine, and 1,4-butanolamine into the solvent N,N-dimethylacetamide to form a mixed amine solution with a concentration of 7.00% by mass;

[0066] 3) Add the prepared mixed amine solution to the N,N-dimethylacetamide solution of the prepolymer and stir rapidly to react to form a polyurethane solution with a mass percentage concentration of ...

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Abstract

The invention discloses a preparation method of anti-skid elastic spandex core-spun yarn suitable for jean fabric. The method comprises the following steps of (1) preparing a prepolymer solution, (2)adding a certain amount of a mixed amine solution into the prepolymer solution, and carrying out a chain extension reaction and a chain termination reaction to prepare a polyurethane urea solution; (3) adding specific auxiliary agent slurry containing hydrotalcite and trace stearate into the polymer solution, stirring, and curing to prepare a spinning solution; (4) performing dry spinning, and adopting a specific spinning oil agent consisting of high-carbon silicone oil and stearate in an oiling process to prepare spandex fiber; and (5) twisting the spun fiber and short fiber to obtain the anti-skid elastic spandex core-spun yarn. The invention relates to the preparation method of the anti-skid elastic spandex core-spun yarn suitable for the jean fabric, and the method can effectively improve the friction performance of the spandex fiber and outer covering yarn, show a lower slipping and elastic degree, and meet the requirements of the field of the jean fabric for the anti-skid elasticspandex fiber.

Description

technical field [0001] The invention relates to a method for preparing an anti-slip elastic spandex core-spun yarn suitable for denim fabrics. Specifically, it is a preparation method and technology of an anti-slip elastic spandex core-spun yarn, which can effectively improve the friction performance between spandex fibers and compatible yarns, and reduce the degree of slip and elastic of spandex fibers in denim fabrics. It belongs to the field of core-spun yarn manufacturing for denim fabrics. Background technique [0002] With the improvement of the quality of life, consumers have higher and higher requirements for clothing comfort. Traditional coarse-count twill denim fabrics are generally pure cotton or weft elastic fabrics. Pure cotton fabrics are non-elastic and easy to wrinkle. Although cotton fabrics are comfortable and breathable, they have no elasticity in both warp and weft, which greatly limits the application of pure cotton denim fabrics. The middle weft yarn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D02G3/32D01D5/04D01D13/02D01F1/10D01F6/94D06M13/188D06M15/643D06M101/30
CPCD01D5/04D01D13/02D01F1/10D01F6/94D02G3/328D06M13/188D06M15/643D06M2101/30
Inventor 周莉马立伟张豪张永琪汪英康许科孙湘东
Owner ZHENGZHOU ZHONGYUAN SPANDEX ENG TECH
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