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Preparation technique of water-soluble polyvinyl alcohol fiber and application thereof

A technology of polyvinyl alcohol fiber and preparation process, which is applied in the direction of spinning solution preparation, fiber treatment, fiber chemical characteristics, etc., can solve problems such as difficulties in industrial production, difficulties in stock solution preparation, spinneret holes, etc., and achieve excellent performance effects

Active Publication Date: 2011-04-27
CHINA PETROCHEMICAL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to factors such as the difficulty in preparing the stock solution and the small number of spinneret holes, it is difficult to realize industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039]With degree of polymerization 1750 ± 50, polyvinyl alcohol 48.3kg of degree of polymerization 97mol% and degree of polymerization 1750 ± 50, polyvinyl alcohol 20.7kg blending of degree of alcoholysis 92mol%, join in containing dimethyl sulfoxide: water = 90:8 In a 231kg ​​stainless steel dissolution kettle, under stirring at a temperature of 100±3°C and a pressure of -0.05Mpa, after dissolving for 3 hours, it was pumped and filtered, degassed under normal pressure for 8 hours, and the degassing temperature was 97°C to obtain The temperature of the spinning stock solution is 97°C; after being metered by a metering pump, it enters the candle filter for filtration, and then enters the insulated spinning assembly. The spinning assembly is immersed in a methanol coagulation bath at -10°C, and then sprayed through a 0.10mm pore size and 15,000-hole spinneret Slabs are sprayed out to form as-spun fibers in a jelly state, and then enter a methanol bath at 35°C, stretched 6 times,...

Embodiment 2

[0043] With degree of polymerization 1000 ± 50, polyvinyl alcohol 48.8kg of degree of polymerization 99mol% and degree of polymerization 1750 ± 50, polyvinyl alcohol 26.2kg of degree of alcoholysis 92mol% are blended, join in containing dimethyl sulfoxide: water = 90:8 In a 237kg stainless steel dissolution kettle, under stirring, at a temperature of 100±3°C and a pressure of -0.02Mpa, after dissolving for 3.5 hours, it was pumped and filtered, degassed under normal pressure for 8 hours, and the degassing temperature was 97°C to obtain Spinning stock solution with few gel particles; metered by a metering pump, filtered through a candle wick filter, and then entered into an insulated spinning assembly. The spinning assembly is immersed in a methanol coagulation bath at -12°C, passed through a 0.12mm pore size, 10,000-hole The spinneret is sprayed out to form as-spun fibers in a jelly state; then enters a 30°C methanol bath, stretches 4.8 times, and draws and extracts in a 50°C m...

Embodiment 3

[0047] 1750 ± 50, polyvinyl alcohol 41.5kg of degree of alcoholysis 97mol% and degree of polymerization 1750 ± 50, polyvinyl alcohol 35.5kg of degree of alcoholysis 92mol% are blended, join in containing dimethyl sulfoxide: water=92: 6 In a 223kg stainless steel dissolution kettle, under stirring, at a temperature of 100±3°C and a pressure of -0.01Mpa, after dissolving for 3.5 hours, it was pumped and filtered, degassed under normal pressure for 8 hours, and the degassing temperature was 97°C to obtain the spinning stock solution The temperature is 97°C; after being metered by a metering pump, it enters the candle filter for filtration, and then enters the insulated spinning assembly. The spinning assembly is immersed in a methanol coagulation bath at -15°C, and is sprayed out through a spinneret with an aperture of 0.08mm and 20,000 holes. Form the primary fiber in jelly state, then enter the methanol bath at 30°C, stretch it 4.5 times, and then draw and extract the wet stretc...

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Abstract

The invention relates to a preparation technique of water-soluble polyvinyl alcohol fiber and application thereof, which is characterized in that in the preparation of spinning stock solution, the mixed solvent of dimethyl sulfoxide and water is used for dissolving polyvinyl alcohol, and the weight percentage concentration is controlled to 5-25%; porous wet gel spinning is adopted, and at least 5000 holes are available; and the water soluble temperature of the obtained fiber is 20-80 DEG C. The invention shortens the dissolution time of the polyvinyl alcohol and leads the polyvinyl alcohol to be fully dissolved; and the obtained solution is good in spinnability, is capable of producing high-quality water-soluble fiber and realizes the requirement of industrialization for the yield. The water-soluble fiber obtained by the invention is used for producing long tows, or being processed into wool tops, or being blending with the wool tops, cotton slivers, hemp and other chemical fibers, and can be made into high count yarn or hollow yarn or short fiber used for non-woven fabrics, embroidered base cloth and paper making.

Description

technical field [0001] The invention relates to a water-soluble polyvinyl alcohol fiber, in particular to a preparation method and application of low-temperature water-soluble polyvinyl alcohol. Background technique [0002] Polyvinyl alcohol is a polymer with excellent performance and a wide range of uses. The high-performance fiber prepared from it has excellent corrosion resistance, weather resistance and good bonding performance with the substrate interface. It is the most developed among synthetic fibers. Promising asbestos materials are widely used in the construction industry. At the same time, they can also be used as tire cords, industrial fabrics, high-performance ropes, plastic and rubber reinforcement materials, etc., with great market potential. [0003] Polyvinyl alcohol contains a large number of hydroxyl groups and has good water solubility, especially when the content of acetic acid groups is high, the macromolecular regularity is poor, the possibility of cr...

Claims

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Application Information

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IPC IPC(8): D01D1/02D01D1/10D01D5/06D01D10/00D01D10/02D01D10/06D01D11/00D01F6/14
Inventor 赵寰叶光斗何云李守群王华全王建巩清建
Owner CHINA PETROCHEMICAL CORP
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