Low melting point spandex slice and preparation method thereof

A low-melting, spandex technology, applied in the field of chemical materials, can solve the problems of ironing trouble, high Vicat softening temperature, and high Vicat softening temperature of spandex yarn, and achieves the effect of easy ironing and low Vicat softening temperature.

Inactive Publication Date: 2014-02-19
南通华盛高聚物科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Vicat softening temperature of the melt-spun spandex chips produced by the prior art is relatively high, which leads to the high Vicat softening temperature of the span

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1:

[0021] Mix 552.5kg of polytetramethyl ether glycol, 97.5kg of polycaprolactone glycol, 300kg of isophorone diisocyanate, 25kg of 1,4-butanediol, and 25kg of 1,3-propanediol. , It is injected into the twin-screw extruder by the metering pump through the high-speed mixing head, the screw diameter is 72-95, the screw length-to-diameter ratio is 45-80, and the temperature of each section of the screw is controlled at 120℃, 160℃, 180℃, 180℃ , 185℃, 185℃, 175℃, 170℃, 170℃, 185℃, 190℃, the accuracy is ±1℃, the screw speed is 80-120r / min, after underwater granulation, dry packaging, the finished product is obtained .

Example Embodiment

[0022] Example 2:

[0023] Mix 603 kg of polytetramethyl ether glycol, 67 kg of polycarbonate diol, 270 kg of 4,4'-diphenylmethane diisocyanate, 20 kg of 1,4-butanediol, and 40 kg of 1,3-propanediol The mixing is uniform, and the metering pump is injected into the twin-screw extruder through the high-speed mixing head. The screw diameter is 72-95, the screw L / D ratio is 45-80, and the temperature of each section of the screw is controlled at 120℃, 160℃, 180℃, 180℃, 185℃, 185℃, 175℃, 170℃, 170℃, 185℃, 190℃, the accuracy is ±1℃, the screw speed is 80-120r / min, after underwater granulation, dry packaging Get the finished product.

Example Embodiment

[0024] Example 3:

[0025] 665kg of polytetramethyl ether glycol, 35kg of polycaprolactone glycol, 250kg of 4,4'-diphenylmethane diisocyanate, 30kg of 1,4-butanediol, 20kg of 1,3- The propylene glycol is uniformly mixed and injected into the twin-screw extruder by a metering pump through a high-speed mixing head. The screw diameter is 72-95, the screw length-to-diameter ratio is 45-80, and the temperature of each section of the screw is controlled at 100℃, 135℃, and 145℃ , 150℃, 150℃, 160℃, 160℃, 150℃, 145℃, 150℃, 155℃, accuracy ±1℃, screw speed 80-120r / min, after underwater granulation, dry packaging, Make the finished product.

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PUM

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Abstract

The invention discloses a low melting point spandex slice and a preparation method thereof, and belongs to the field of chemical materials. The low melting point spandex slice comprises following raw materials, by weight, 65 to 70% of a mixture of polyether polyols and polyester polyols, 25 to 30% of isocyanate, and 4 to 7% of a chain extender, wherein the mixture comprises 85 to 95wt% of the polyether polyols, and 5 to 15wt% of the polyester polyols. Advantages of the preparation method are that: vicat softening temperature of the low melting point spandex slice prepared by the preparation method is relatively low, and vicat softening temperature of spandex fiber made of the low melting point spandex slice is relatively low, so that ironing and pressing are convenient.

Description

technical field [0001] The invention relates to a low melting point spandex slice and a preparation method thereof, belonging to the field of chemical materials. Background technique [0002] Melt-spun spandex chip is the upstream raw material for manufacturing melt-spun spandex. At present, there are two main types of spandex at home and abroad according to their different manufacturing methods: dry-process spandex and melt-spun spandex. A significant advantage of melt-spun spandex over dry-process spandex is production The process does not use solvents, so it is called "green spandex". It is an important chemical fiber raw material for manufacturing spandex high-end clothing and underwear, and is generally favored by domestic and foreign textile and chemical fiber markets. However, because of its lower heat resistance and resilience than dry-process spandex, melt-spun spandex limits its application fields to a large extent. The heat resistance and resilience of melt-spun...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/32B29B9/06
CPCC08G18/6607B29B9/06B29C48/505B29C48/92B29C2948/92619C08G18/3206C08G18/4854
Inventor 张春华
Owner 南通华盛高聚物科技股份有限公司
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