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Heat-resistant spandex fiber and preparation method thereof

A spandex fiber, heat-resistant technology, applied in fiber chemical characteristics, rayon manufacturing, textiles and papermaking, etc., can solve problems such as heat resistance, limit the application of spandex, reduce elasticity, etc., and achieve excellent heat resistance and stable chemical structure , The effect of increasing the heat distortion temperature

Active Publication Date: 2017-04-26
YANTAI TAYHO ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, spandex has been used more and more together with polyester, but polyester generally requires high-temperature dyeing at 125-130°C, while ordinary spandex yarn is not heat-resistant, and when used for a long time at 100-140°C, the fiber will change. Yellow, sticky, and decreased strength, mainly because the hard segment of spandex is easily damaged at high temperature, and the urethane urea structure in the molecular chain is also easy to oxidize and degrade
Therefore, spandex is easily damaged at high dyeing temperature and reduces elasticity or causes yarn breakage
In addition, when spandex is blended with other fibers, especially polyester, due to the heat resistance of spandex, blended fabrics are difficult to meet people's diverse color requirements, which limits the application of spandex and has become an urgent breakthrough in the development of spandex. One of the technical bottlenecks

Method used

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  • Heat-resistant spandex fiber and preparation method thereof
  • Heat-resistant spandex fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: According to the data ratio in the scale table

[0028] Add m-phenylenediamine to dimethylacetamide at a concentration of 8%, lower the temperature to 0°C, and gradually add isophthaloyl chloride to react, and isophthaloyl chloride accounts for 90% of the total mass to obtain a prepolymer solution; add ammonia to the prepolymer solution to neutralize the hydrogen chloride therein to generate ammonium chloride solid insoluble in the solution; filter and remove the ammonium chloride to obtain a transparent prepolymer filtrate; then add the remaining spacer to the prepolymer filtrate Phthaloyl chloride, continue chain extension to obtain polymer solution; add neutralizing agent dibutylamine to the polymer solution, adjust the pH value of the polymer solution to neutrality, obtain the meta-aramid fiber spinning stock solution of the polymer The content is 20%.

[0029] React polytetramethylene ether glycol and diisocyanate at a molar ratio of 1:2 to obtain a ...

Embodiment 2

[0030] Embodiment 2: According to the ratio in the ratio table, the same method as described in Embodiment 1 is used to prepare novel heat-resistant spandex fibers, wherein the addition amount of the meta-aramid spinning stock solution is 2% of the solid content of the polyurethane polymer.

Embodiment 3

[0031] Embodiment 3: According to the ratio in the ratio table, the same method as described in Embodiment 3 is used to prepare novel heat-resistant spandex fibers, wherein the addition amount of the meta-aramid spinning stock solution is 3% of the solid content of the polyurethane polymer.

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PUM

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Abstract

The invention discloses a preparation method of heat-resistant spandex fiber. The preparation method is characterized in that a spinning solution for production of m-aramid fiber is added to a spinning solution for production of spandex. The method comprises four steps including preparation of the spandex spinning solution, preparation of the m-aramid fiber spinning solution, mixing of the spandex spinning solution and the m-aramid fiber spinning solution and dry spinning. The novel heat-resistant spandex fiber prepared through spinning after a few m-aramid fiber spinning solutions are added to the spandex spinning solution and mixed uniformly not only keeps original high elasticity, but also has more excellent heat resistance than conventional spandex fiber under the action of the m-aramid fiber spinning solution.

Description

technical field [0001] The invention relates to a fiber polymer preparation method, in particular to a heat-resistant spandex fiber and a preparation method thereof. Background technique [0002] Spandex is a highly elastic textile fiber that has been widely used in knitted and woven elastic fabrics. With the expansion of the application field of spandex, people put forward higher requirements for the performance of spandex. In addition to the requirements for elasticity, different requirements such as chlorine resistance, heat resistance, and oxidation resistance have been put forward for spandex according to different uses. requirements, among which the requirements for heat resistance are particularly prominent. For example, the color requirements of fabrics are becoming more and more stringent, and secondary and tertiary color changes are more common, which poses new challenges to the heat resistance of spandex. [0003] In recent years, spandex has been used more and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F1/10C08G18/66C08G18/48C08G18/32C08G18/10C08G69/32
CPCC08G18/10C08G18/4854C08G69/32D01F1/10D01F6/94C08G18/3228
Inventor 韩虎贾秋梓梁国东赵汉阳王卫庆魏会芳
Owner YANTAI TAYHO ADVANCED MATERIALS CO LTD
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