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Method for preparing melt-spinning chlorine-resistant high-resilience spandex fiber

A technology of spandex fiber and high resilience, which is applied in the field of preparation of melt-spun chlorine-resistant high-resilience spandex fiber and the modification and manufacture of melt-spun spandex fiber, which can solve the problems of low differentiation rate of spandex fiber, poor chlorine resistance and resilience, It cannot meet the problems of chlorine resistance and resilience, and achieve the effect of maintaining physical properties, improving resilience, and improving the degree of microphase separation

Inactive Publication Date: 2013-02-27
奥斯汀新材料(张家港)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The spandex fiber prepared by the above method has a low differentiation rate, especially poor in chlorine resistance and resilience, and cannot meet the needs of some fields with high chlorine resistance and resilience.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] Heat 4000g of polytetrahydrofuran diol to 100°C, dehydrate under the condition of -0.10~-0.06 MPa for 2 hours, and then protect it with nitrogen. 40g of ethylenediamine preheated to 110°C and protected with nitrogen was sent to a twin-screw extruder, 8g of antioxidant Tinuvin622 and 20g of talcum powder were added, the reaction temperature was controlled at 110°C, and the pressure was at 5MPa to prepare thermoplastic polyurethane chips. After being fully mixed with 280 g of chlorine-resistant crosslinking agent, the silk cake is placed in an oven at a temperature of 80° C. and aged for 72 hours to obtain a product by melt spinning.

example 2

[0025] Heat 4000g of polyoxypropylene diol to 80°C, dehydrate under the condition of -0.10~-0.06 MPa for 4 hours, then protect it with helium gas, heat 320g of MDI to 50°C and protect it with helium gas, and mix the two evenly for pre-reaction. Then add 30g and 10g of the mixture of ethylenediamine and propylenediamine which has been preheated to 100°C and protected with helium, transported to the twin-screw extruder, add 12g of antioxidant Tinuvin622 and 20g of titanium dioxide, and control the reaction temperature to 120°C , pressure at 4MPa, prepared thermoplastic polyurethane chips, and then fully mixed with 320g of chlorine-resistant crosslinking agent, through melt spinning, the silk cake was placed in an oven at a temperature of 90°C, and matured for 64 hours to obtain a product.

example 3

[0027] Heat tetrahydrofuran and propylene oxide copolyethylene glycol 4000g to 110°C, dehydrate under the condition of -0.10~-0.06 MPa for 3 hours, then protect with argon gas, heat 280g MDI to 45°C and protect with argon gas, the two are pre-reacted, and then Add 30g and 30g of a mixture of propylenediamine and pentamethylenediamine preheated to 120°C and protected by argon, and transport it to a twin-screw extruder, add 7g of antioxidant Tinuvin622 and 24g of titanium dioxide, and control the reaction temperature to 115°C. The pressure is 5 MPa, prepare thermoplastic polyurethane chips, and then fully mix with 300g of chlorine-resistant crosslinking agent, through melt spinning, place the silk cake in an oven at 100°C, and ripen for 50 hours to obtain the product.

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Abstract

The invention discloses a method for preparing a melt-spinning chlorine-resistant high-resilience spandex fiber. The method comprise the following steps: 1) preparation of a thermoplastic polyurethane slice by a one-step method; 2) uniform mixing with a chlorine-resistant cross-linking agent; 3) melt extrusion; 4) spinning and moulding; 5) post-curing. The invention solves a problem of demand of high chlorine resistance and high resilience in some special fields. The chlorine-resistant cross-linking agent is well reacted and combined with the spandex fiber and will not separate out; and physical properties of the fiber can be well preserved during usage in a chlorine contained environment. In addition, a diamine chain extender and polyether polyol with low degree of unsaturation and high molecular weight are used to enhance fiber rebound resilience.

Description

technical field [0001] The invention relates to a modified manufacturing technology of melt-spun spandex fibers, which belongs to the field of chemical fiber modification, and specifically relates to a method for preparing melt-spun chlorine-resistant high-resilience spandex fibers. Background technique [0002] Melt-spun spandex technology has the advantages of simple process flow, low equipment investment, high production efficiency, and environmental protection. In recent years, there has been a boom in investment worldwide. Melt-spun spandex fibers are made by fully mixing thermoplastic polyurethane chips, additives, and cross-linking agents, and extruding them through a screw machine. [0003] The spandex fiber prepared by the above method has a low differentiation rate, especially poor in chlorine resistance and resilience, and cannot meet the needs of some fields with high chlorine resistance and resilience. Therefore, it is necessary to develop a new type of melt-sp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/94C08G18/66C08G18/48C08G18/32
Inventor 李敏超承黎明陈海风张东芝
Owner 奥斯汀新材料(张家港)有限公司
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