Method for preparing water soluble polyvinyl alcohol fiber through melt spinning

A polyvinyl alcohol fiber, melt spinning technology, applied in melt spinning, spinning solution preparation, stretch spinning and other directions, can solve problems such as low production efficiency, high energy consumption, pollution, etc., to improve production efficiency, Fiber is highly water-soluble and has the effect of reducing environmental pollution

Inactive Publication Date: 2013-11-27
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional PVA fibers are generally wet-spun, but there are shortcomings such as serious pollution...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Mixing: Add 1 kg of polyvinyl alcohol powder with a degree of polymerization of 800 and a degree of alcoholysis of 99% to 2 kg of a compound plasticizer containing ethylene glycol and 1,4 butanediol in a weight ratio of 1:3, 80 ℃ Mix well for 12h. Melt spinning: put the mixed raw materials into the spinning machine, after they are fully melted, they pass through the spinning assembly and are sprayed out from the spinneret with an aperture of 1mm. The temperature of each zone of the screw is: feed section 80°C, compression section 100°C and metering section 140°C, spinning assembly temperature 160°C, spinneret temperature 140°C, cooling blowing temperature 50°C, spinning speed of spun silk 300m / min; dry stretching and setting: the polyvinyl alcohol primary fiber prepared in the previous step is stretched twice at 110°C, and then dried in a hot air oven at a temperature of 70°C to make a strength of 3cN / dtex and a fineness of 1.8dtex 1. For polyvinyl alcohol fibers with...

Embodiment 2

[0024] Mixing: Add 1 kg of polyvinyl alcohol pellets with a degree of polymerization of 1700 and a degree of alcoholysis of 88% to 1.5 kg of polyacrylamide, caprolactam and 1,3 propylene glycol in a weight ratio of 1:10:30 In the compound plasticizer, mix thoroughly at 50°C for 8 hours. Melt spinning: put the mixed material into the spinning machine, after it is fully melted, it passes through the spinning assembly and is sprayed out from the spinneret with an aperture of 0.5mm, and the melt stream is cooled by blowing to obtain the primary polyvinyl alcohol fiber; The temperature of each zone of the screw is: feed section 70°C, compression section 120°C and metering section 150°C, spinning assembly temperature 180°C, spinneret temperature 160°C, ring blowing temperature 60°C, spinning speed of spun silk 300m / min; dry stretching and setting: the polyvinyl alcohol primary fiber obtained in the previous step is stretched twice at 100°C, and then dried in a hot air oven at a tem...

Embodiment 3

[0026] Mixing: Add 1 kg of polyvinyl alcohol pellets with a degree of polymerization of 1700 and a degree of alcoholysis of 99% to 2.5 kg of polyacrylate monohydroxyethylene glycol ester and 1,3 butanediol with a weight percentage of 10:75 In the compound plasticizer, after fully mixing at 80°C for 12 hours. Melt spinning: put the mixed raw materials into the spinning machine, after fully melting, pass through the spinning assembly and spray out from the spinneret with an aperture of 1.5mm, and the melt stream is cooled by blowing to obtain polyvinyl alcohol primary fibers; The temperature of each zone of the screw is: feed section 60°C, compression section 120°C and metering section 150°C, spinning assembly temperature 160°C, spinneret temperature 150°C, ring blowing temperature 90°C, spinning speed of spun silk 400m / min; dry stretching and shaping: the polyvinyl alcohol primary fiber obtained in the previous step is stretched 4 times at 100°C, and then dried in a hot air ov...

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PUM

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Abstract

The invention relates to a method for preparing water soluble polyvinyl alcohol fiber through melt spinning. The method comprises the following steps: adding polyvinyl alcohol into a composite plasticizer, and mixing for 0.5-24 h at the temperature of 0-120 DEG C; performing melt spinning to obtain polyvinyl alcohol nascent fiber; stretching, shaping and drying to obtain the water soluble polyvinyl alcohol fiber. According to the invention, the fusing point of modified polyvinyl alcohol is reduced to the decomposition temperature below to realize the melt spinning of the water soluble polyvinyl alcohol fiber, and the plasticizer is not needed to be removed; besides, the environmental pollution is eliminated, the production efficiency is improved, and the water-solubility of the water soluble polyvinyl alcohol fiber is superior to that of the traditional polyvinyl alcohol fiber.

Description

technical field [0001] The invention belongs to the field of preparation of water-soluble fibers, in particular to a method for preparing water-soluble polyvinyl alcohol fibers by melt spinning. Background technique [0002] Water-soluble fiber refers to the fiber that can be dissolved in water or slowly hydrolyzed into water-soluble molecules (or compounds) when encountering water. It is a valuable functional differentiated fiber. With the continuous enhancement of people's awareness of environmental protection, the application of non-toxic, non-polluting and hydrolyzable environmentally friendly water-soluble fibers has gradually become popular, and the research and development of this fiber has also been continuously deepened, and its application is very extensive. [0003] Water-soluble fibers are generally dissolved at a certain stage during processing and use to achieve a certain effect. Therefore, it should have the following characteristics: (1) It can be fully diss...

Claims

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Application Information

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IPC IPC(8): D01F6/50D01F1/10D01D1/02D01D5/08D01D5/12D01D10/02D01D10/06
Inventor 俞昊周腾飞范睿王珵黄涛
Owner DONGHUA UNIV
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