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Method for preparing melt spun chlorine-resistance high resilient polyurethane fiber

A technology of spandex fiber and high resilience, applied in fiber processing, fiber chemical characteristics, rayon manufacturing, etc., can solve the problem of inability to meet chlorine resistance and resilience fields, poor chlorine resistance and resilience, and differential rate of spandex fibers. Low problems, to achieve the effect of maintaining physical properties, improving resilience, and improving the degree of microphase separation

Inactive Publication Date: 2011-04-13
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

Embodiment 1

[0022] Heat 4000 g of polycaprolactone diol to 85 °C to melt it, under the protection of nitrogen, add the melted polycaprolactone diol to the reaction kettle, turn off the nitrogen, vacuumize to -0.09 MPa, and keep at 85 °C, Degassing for 2 hours; heat 240 g of MDI to 50 °C to melt it, under the protection of nitrogen, add the melted MDI to the reactor, turn off the nitrogen, vacuumize to -0.09 MPa, keep at 50 °C, and defoam for 2 hours; Under the protection of nitrogen, the pretreated polycaprolactone diol and MDI were pre-reacted at 120 °C for 30 seconds, and then 40 g of ethylenediamine, 8 g of antioxidant Tinuvin622 and 20 g of Talc powder, control the reaction temperature at 170 °C to prepare thermoplastic polyurethane slices, and then mix it evenly with 280 g of chlorine-resistant crosslinking agent, then melt spinning, place the silk cake in an oven at 80 °C, and mature for 72 hours Get the product.

Embodiment 2

[0024] Heat 4000 g of polycaprolactone diol to 80 °C to melt it. Under the protection of helium, add the melted polycaprolactone diol to the reaction kettle, turn off the helium, vacuumize to -0.09 MPa, and keep at 80 ℃, degassing for 3 hours; heat 320 g MDI to 50 ℃ to make it melt, under the protection of helium, put the melted MDI into the reaction kettle, turn off the helium, evacuate to -0.09 MPa, keep at 50 ℃, degas Soak for 3 hours; under the protection of helium, pre-react the pretreated polycaprolactone diol with MDI at 130 ° C for 30 seconds, and then add 30 g of ethylenediamine and 10 g of propylene glycol to the middle of the twin-screw extruder at the same time Amine, 12 g of antioxidant Tinuvin622 and 20 g of titanium dioxide were controlled at a reaction temperature of 180 °C to prepare thermoplastic polyurethane slices, which were uniformly mixed with 320 g of chlorine-resistant cross-linking agent, and the silk cake was placed in the The temperature is in an ov...

Embodiment 3

[0026] Heat 4000 g of polycaprolactone diol to 90 °C to melt it. Under the protection of argon, add the melted polycaprolactone diol to the reaction kettle, close the argon, vacuumize to -0.09 MPa, and keep 90 ℃, degassing for 3 hours; heat 280 g MDI to 45 ℃ to melt, under the protection of argon, put the melted MDI into the reaction kettle, turn off the argon, evacuate to -0.09 MPa, keep at 45 ℃, degas Soak for 3 hours; under argon protection, pre-react the pretreated polycaprolactone diol with MDI at 135 °C for 35 seconds, then add 30 g of propylenediamine and 30 g of pentadiene to the middle of the twin-screw extruder at the same time Amine, 7 g of antioxidant Tinuvin622 and 24 g of titanium dioxide were controlled at a reaction temperature of 185 °C to prepare thermoplastic polyurethane slices, which were uniformly mixed with 300 g of chlorine-resistant cross-linking agent, and the silk cake was placed in the The temperature is 100 ℃ in the oven, aging for 60 hours to obta...

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Abstract

The invention discloses a method for preparing melt spun chlorine-resistance high resilient polyurethane fiber, comprising the following steps: 1) a thermoplastic polyurethane slice is prepared by a one-step method; 2) the slice is uniformly mixed with chlorine-resistance cross-linking agent; 3) melt extrusion is carried out; 4) spinning moulding is carried out; and 5) post curing is carried out. By utilizing the invention, the requirement on higher chlorine resistance and resilience in special fields is met, combination of the chlorine-resistance cross-linking agent and polyurethane fiber is good, and the physical performance of fiber can be effectively maintained when being used in a chlorine-containing environment; and besides, diamine is adopted as chain extension agent, the hard section of the formed polyurethane urea has higher cohesive energy, three-dimensional hydrogen bonds can be formed, and the microphase separation degree is improved, thus improving the resilience of fiber.

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 Applications(China)
IPC IPC(8): D01F6/94D01F1/10C08G18/66C08G18/48C08G18/42D01D1/00D01D1/10D01D5/088D01D10/02B29C47/92B29C48/92
CPCB29B9/065B29B7/46B29B7/72B29B7/90B29B9/12B29B9/14B29C48/92B29C2948/92704B29C2948/92895
Inventor 李敏超承黎明陈海风张东芝王文明李高强
Owner 奥斯汀新材料(张家港)有限公司
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