A preparation method of anti-slip elastic spandex core-spun yarn suitable for denim fabrics

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, which can solve problems such as complex technological process, achieve high production efficiency, avoid fiber adhesion, and improve Effect of Coefficient of Friction

Active Publication Date: 2021-11-19
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

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  • A preparation method of anti-slip elastic spandex core-spun yarn suitable for denim fabrics

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

A method for preparing an anti-slip elastic spandex core-spun yarn suitable for denim fabrics, comprising the following steps: (1) preparing a prepolymer solution, (2) adding a certain amount of mixed amine solution to the prepolymer solution for chain extension reaction and chain termination reaction to prepare a polyurethane urea solution; (3) adding specific additive slurry containing hydrotalcite and a small amount of stearate to the polymer solution, stirring and maturing to prepare a spinning stock solution; (4) After dry spinning, the oiling process uses a specific spinning oil composed of high-carbon silicone oil and stearate to make spandex fibers; (5) twist the spun fibers and short fibers to make non-slip elastic spandex core yarn. The invention relates to a method for preparing an anti-slip elastic spandex core-spun yarn suitable for denim fabrics, which can effectively improve the friction performance between spandex fibers and outer-wrapped yarns, exhibit a lower degree of slip and elasticity, and satisfy the requirement of anti-slip elastic spandex in the field of denim fabrics. fiber needs.

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 Patents(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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