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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 spandex yarn produced by using these spandex chips, which causes certain troubles for ironing and is not suitable for some Fields of application of Vicat softening temperature

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix 552.5kg of polytetramethyl ether diol, 97.5kg of polycaprolactone diol, 300kg of isophorone diisocyanate, 25kg of 1,4-butanediol, and 25kg of 1,3-propylene glycol , 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°C, 160°C, 180°C, 180°C , 185°C, 185°C, 175°C, 170°C, 170°C, 185°C, 190°C, the precision is ±1°C, the screw speed is 80-120r / min, after underwater granulation, dry packaging, the finished product is obtained .

Embodiment 2

[0023] 603kg of polytetramethyl ether diol, 67kg of polycarbonate diol, 270kg of 4,4'-diphenylmethane diisocyanate, 20kg of 1,4-butanediol, 40kg of 1,3-propanediol Mix evenly, and inject it into the twin-screw extruder through the high-speed mixing head by the metering pump. 180°C, 185°C, 185°C, 175°C, 170°C, 170°C, 185°C, 190°C, the precision is ±1°C, the screw speed is 80-120r / min, after underwater granulation, dry packaging, Get the finished product.

Embodiment 3

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