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Preparation method of polyurethane fiber with tensile fatigue resistance

A technology of polyurethane fiber and fatigue performance, applied in the field of polyurethane fiber to achieve the effect of improving tensile fatigue resistance

Active Publication Date: 2016-03-09
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there is no patent report to add helical nanotubes to the fiber to improve the tensile fatigue resistance of the fiber

Method used

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  • Preparation method of polyurethane fiber with tensile fatigue resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Disperse 15 grams of spiral carbon nanotubes in 300 grams of dimethylacetamide, add 2 grams of polyvinylpyrrolidone at the same time, and use a 500-watt ultrasonic oscillator to vibrate for 4 hours to make a spiral-shaped carbon nanotube with a mass concentration of 5%. Carbon nanotube dispersion;

[0036]2 kg of PTMG, 0.8 kg of 4,4'-diphenylmethane diisocyanate (MDI) and 3.6 kg of DMAC were prepolymerized at 60 degrees Celsius for 3 hours; the prepolymerized product was dissolved and diluted by adding 4.0 kg of DMCA, and Cool to 18 degrees Celsius; then slowly drop ethylene glycol, propylenediamine, diethylenetriamine mixed liquid as the chain extender reactant, and the agent reaction control agent is methanol. After the chain extension reaction is completed, add a helical carbon nanotube dispersion, an antioxidant, a light stabilizer, and a lubricant, and stir for 36 hours to obtain a polyurethane spinning solution;

[0037] Then the polyurethane spinning solution is...

Embodiment 2

[0039] Disperse 40 grams of spiral-shaped silicon nanotubes in 600 grams of dimethylacetamide, add 5 grams of polyvinylpyrrolidone at the same time, and use a 500-watt ultrasonic oscillator to vibrate for 6 hours to make a spiral-shaped silicon nanotube with a mass concentration of 6.7%. Silicon nanotube dispersion;

[0040] 3.5 kg of PTMG, 1.0 kg of 4,4'-diphenylmethane diisocyanate (MDI) and 5.2 kg of DMAC were prepolymerized at 53 degrees Celsius for 4 hours; the prepolymerized product was dissolved and diluted by adding 4.0 kg of DMCA, and Cool to 25 degrees Celsius; then slowly drop ethylenediamine, propylenediamine, and glycerol mixed liquid as the chain extender reactant, and the agent reaction control agent is n-butanol. After the chain extension reaction is completed, add a helical silicon nanotube dispersion, an antioxidant, a light stabilizer, and a lubricant, and stir for 48 hours to obtain a polyurethane spinning solution;

[0041] Then the polyurethane spinning ...

Embodiment 3

[0043] Disperse 50 grams of spiral silicon dioxide nanotubes in 500 grams of dimethylacetamide, add 8 grams of polyvinylpyrrolidone at the same time, and use a 500-watt ultrasonic oscillator to vibrate for 4.5 hours to make a mass concentration of 10%. Helical silica nanotube dispersion;

[0044] 3.2 kg of PTMG, 0.73 kg of 4,4'-diphenylmethane diisocyanate (MDI) and 3.2 kg of DMAC were prepolymerized for 3.5 hours at 38 degrees Celsius; the prepolymerized product was dissolved and diluted by adding 4.8 kg of DMCA, and Cool to 6 degrees Celsius; then slowly drop 1,4-butanediol, 1,5-pentanediamine, and glycerol mixed liquid as a chain extender reactant, and the agent reaction control agent is n-pentanol. After the chain extension reaction is completed, add a helical silica nanotube dispersion, an antioxidant, a light stabilizer, and a lubricant, and stir for 40 hours to obtain a polyurethane spinning solution;

[0045] Then the polyurethane spinning solution is squeezed to the ...

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Abstract

The invention discloses a preparation method of a polyurethane fiber with tensile fatigue resistance. According to the method, a screw-type nanotube is added to the polyurethane fiber for the first time. The method specifically comprises the following steps of firstly, using a high molecular surfactant and sonic oscillation treatment to do surface modification and dispersion processing on the screw-type nanotube, so as to prepare uniform and stable screw-type nanotube dispersion liquid; then uniformly mixing the dispersion liquid and other auxiliaries with a polyurethane solution; finally, forming the polyurethane fiber through a high-temperature channel evaporation solvent. According to the technical method, spring-effect of the screw-type nanotube is utilized to build a firmer elastic network structural system, so the tensile fatigue resistance of the polyurethane fiber is obviously promoted.

Description

technical field [0001] The invention belongs to the technical method of polyurethane fiber, in particular to a preparation method of polyurethane fiber with tensile fatigue resistance. Background technique [0002] Polyurethane fiber ("spandex" for short) is widely used in high-end clothing, sweatshirts, underwear, socks, swimsuits and other textile fields due to its good elasticity. Among them, spandex products with a fineness of more than 140 denier are mainly used in the production of underwear shoulder straps, socks mouth, cuffs and other elastic bands, etc. However, in the process of using ammonia-containing fabrics, it is often found that these elastic clothes will become less and less elastic after being worn for a long time and many times, and the clothes that originally have a self-cultivation effect become loose and loose, especially the neckline and cuffs, etc. parts tend to be more prone to elastic failure. This is mainly due to the poor tensile fatigue resista...

Claims

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Application Information

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IPC IPC(8): D01F6/94D01F1/10C08G18/66C08G18/48C08G18/10C08K9/04C08K9/00C08K7/24C08K3/36
CPCC08G18/10C08G18/4854C08G2261/93C08K3/36C08K7/24C08K9/00C08K9/08C08K2201/011D01F1/10D01F6/94C08G18/3228C08G18/3206
Inventor 许图远王靖陈厚翔梁红军杨晓印
Owner ZHEJIANG HUAFENG SPANDEX
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