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Method for preparing moisture absorption and sweat releasing polyurethane elastic fibers having skin core structure

A technology of polyurethane elasticity and skin-core structure, which is applied in fiber treatment, fiber chemical characteristics, rayon manufacturing, etc., can solve the problems of fabric moisture absorption and perspiration performance, insufficient hydrophilicity, etc., and achieve significant moisture absorption and perspiration performance.

Active Publication Date: 2018-12-11
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem that the conventional polyurethane elastic fiber has an impact on the moisture absorption and perspiration performance of the fabric due to insufficient hydrophilicity

Method used

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  • Method for preparing moisture absorption and sweat releasing polyurethane elastic fibers having skin core structure
  • Method for preparing moisture absorption and sweat releasing polyurethane elastic fibers having skin core structure
  • Method for preparing moisture absorption and sweat releasing polyurethane elastic fibers having skin core structure

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preparation example Construction

[0051] The preparation method of the skin-core structure moisture-absorbing and sweat-wicking polyurethane elastic fiber of the present invention specifically comprises the following steps:

[0052] 1) Add silica particles and toluene-2,4-diisocyanate into N,N-dimethylacetamide, disperse through a ball mill for 180 minutes, and then react at a temperature of 80-100°C for 6-8 hours, and the reaction ends Afterwards, centrifuge to obtain silica particles, then disperse with N,N-dimethylacetamide, and repeat several times to obtain functionalized silica particles;

[0053] 2) Add functionalized silica particles into N,N-dimethylacetamide, disperse in a ball mill for 180 minutes, add methoxypolyethylene glycol, and react at a temperature of 70-80°C for 2-4 hours to obtain the N,N-dimethylacetamide dispersion of aqueous silica particles;

[0054] 3) In the first reactor, add diisocyanate and polyether polyol at the same time, place it at a temperature of 70-80°C, and fully carry o...

Embodiment 1

[0063] Step 1. Disperse 3.00kg of silica particles (–OH group 1.0mol / kg, average particle size 20um) in 90kg of N,N-dimethylacetamide solvent, disperse in a ball mill for 180min, then add 3.13kg of toluene dropwise -2,4-Diisocyanate, reacted at 90°C for 6 hours under the protection of nitrogen, filtered with a filter screen after the reaction, and washed with N,N-dimethylacetamide at the same time to obtain functionalized silica particles (-NCO group Group 0.71mol / kg);

[0064] Step 2. Disperse 2.00kg of functionalized silica particles in 27.72kg of N,N-dimethylacetamide, and after dispersing in a ball mill for 180min, add 1.06kg of methoxypolyethylene glycol (molecular weight 750) dropwise, nitrogen React at 80°C for 3.5 hours under protection to obtain hydrophilic silica particles;

[0065] Step 3. Send 237.10kg polytetramethylene ether glycol (molecular weight 1800) and 53.90kg 4,4-diphenylmethane diisocyanate to the first reactor at the same time, the reaction time is 2.2...

Embodiment 2

[0073] Step 1. Disperse 3.00kg of silica particles (–OH group 1.0mol / kg, average particle size 20um) in 90kg of N,N-dimethylacetamide solvent, disperse in a ball mill for 180min, then add 3.13kg of toluene dropwise -2,4-Diisocyanate, reacted at 90°C for 6 hours under the protection of nitrogen, filtered with a filter screen after the reaction, and washed with N,N-dimethylacetamide at the same time to obtain functionalized silica particles (-NCO group Group 0.71mol / kg);

[0074] Step 2. Disperse 2.00kg of functionalized silicon dioxide particles in 27.72kg of N,N-dimethylacetamide, after dispersing in a ball mill for 180min, add dropwise 1.06kg of methoxypolyethylene glycol (molecular weight 2000), nitrogen React at 80°C for 3.5 hours under protection to obtain hydrophilic silica particles;

[0075] Step 3. Send 237.10kg polytetramethylene ether glycol (molecular weight 1800) and 53.90kg 4,4-diphenylmethane diisocyanate to the first reactor at the same time, the reaction time ...

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Abstract

The invention discloses a method for preparing moisture absorption and sweat releasing polyurethane elastic fibers having a skin core structure. The method comprises the following steps: (1) preparinga N,N-dimethylacetamide dispersion solution of hydrophilic silicon dioxide particles; (2) preparing an N,N-dimethylacetamide solution of polyurethane-polyurea, and curing to obtain a sandwich layer spinning liquid; (3) adding conventional additives and the N,N-dimethylacetamide dispersion solution of hydrophilic silicon dioxide particles into part of the polyurethane-polyurea solution, diluting with N,N-dimethylacetamide, and curing to obtain a skin layer spinning fluid; and (4) performing spin-stretching on the sandwich layer spinning liquid through a spinning plate, drying at high temperature through a first corridor to preparing sandwich layer polyethene elastic fiber yarns, coating the skin layer spinning fluid to the surface of the polyurethane elastic fiber yarns through a specificstructure coating device, and performing high-temperature drying, oiling and winding through a second channel to obtain the moisture absorption and sweat releasing polyurethane elastic fibers.

Description

technical field [0001] The invention belongs to a preparation method of polyurethane elastic fibers, in particular to a preparation method of a skin-core structure moisture-absorbing and sweat-wicking polyurethane elastic fiber. Background technique [0002] Polyurethane elastic fiber, referred to as spandex, is a kind of elastic synthetic fiber with high elongation at break, high elastic recovery rate, corrosion resistance, anti-aging, heat resistance, fatigue resistance and other excellent properties, and is widely used in the textile industry. However, polyurethane elastic fibers have a problem of insufficient hydrophilicity due to the hydrophobicity of the raw material polyurethane itself. In recent years, with the increasing proportion of polyurethane elastic fibers in fabrics, the moisture absorption and perspiration performance of fabrics will be affected due to insufficient hydrophilicity. The poor moisture absorption and perspiration performance of the fabric makes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/16D01F1/10D01D5/34
CPCD01D5/34D01F1/10D01F8/16
Inventor 孔懿阳杨晓印温作杨邵晓林池晓智
Owner ZHEJIANG HUAFENG SPANDEX
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