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Anti-wear polyvinyl alcohol aldehyde acetal fiber and its preparing method and use

A technology of polyvinyl acetal and polyvinyl alcohol, which is applied in fiber treatment, fiber chemical characteristics, wet spinning, etc., can solve the problems of poor hot water resistance of fibers, affecting fiber application, and low elongation, and achieves increased elongation. High degree, good crimp stability, and the effect of improving elongation at break

Active Publication Date: 2007-01-24
SOLDIER SYST RES CENT MILITARY SUPPLY EQUIP INST GENERAL LOGISTICS DEPT PLA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods are all based on wet production. Although the strength and modulus of the fiber have been greatly improved, the hot water resistance of the fiber is poor and the elongation is low, so it cannot be used for clothing, tarpaulins, training clothes, etc., which directly affects the fiber Applications in the textile field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: Add 25kg of polyvinyl alcohol with a degree of polymerization of 2950±50 and a degree of alcoholysis of 99mol%, 1.5Kg of boric acid, and 150kg of water into a stainless steel dissolution kettle, and stir at a temperature of 100±3°C and a pressure of 0.12MPa After dissolving for 8 hours, it was pumped and filtered, degassed at normal pressure for 9 hours, and the degassing temperature was 97°C to obtain a spinning stock solution with a temperature of 97°C, metered by a metering pump, and passed through a spinneret with a diameter of 0.10mm and 8000 holes Spinning, forming in an alkaline coagulation bath, drawing the spinneret 1 time, and the spun fibers are neutralized, washed, dried, stretched, and heat-set. The total stretch is 6 times, and then relaxed and heat-set. The semi-finished fiber is acetalized with formaldehyde with a concentration of 90g / L at a temperature of 90°C, then crimped, oiled, cut, and dried to obtain short fibers with a linear density of...

Embodiment 2

[0039] Add 25Kg of polyvinyl alcohol with a degree of polymerization of 1600±50 and an alcoholysis degree of 98mol%, 1.5Kg of copper sulfate, and 120Kg of water into a stainless steel dissolution kettle, and dissolve 6 After 1 hour, it was pumped and filtered, degassed under normal pressure for 8 hours, and the degassing temperature was 98°C. Finally, the spinning stock solution with very few colloidal particles was obtained. The spinneret is spun, formed by an alkaline coagulation bath, the spinneret is drawn 2.5 times, and the spun fibers are neutralized, wet-heat drawn, washed, and then dried, stretched, heat-set and relaxed. The total stretching is 12 times, and the semi-finished fiber is obtained. The semi-finished fiber is acetalized with succinic dialdehyde with a concentration of 45g / L at a temperature of 70°C, and then oiled, dried, cut, and crimped to obtain a linear density of 1.0-2.0dtex. Short fibers with a breaking strength of 9.2cN / dtex, a breaking elongation of...

Embodiment 3

[0041]Add 25Kg of polyvinyl alcohol with a degree of polymerization of 2000±50 and a degree of alcoholysis of 92mol%, 0.5Kg of ammonium titanyl sulfate, and 100Kg of water into a stainless steel dissolution kettle, under stirring at a temperature of 98-100°C and a pressure of 0.10MPa , after dissolving for 6 hours, filtered by pump pressure, degassed at normal pressure for 8 hours, and degassed at a temperature of 97°C, and finally obtained a spinning stock solution with good spinnability. mm, 8000 hole spinneret, formed by alkaline coagulation bath, the spinneret is drawn 4 times, the spun fibers are neutralized, drawn by wet heat, washed with water, then dried, stretched and heat-set , the total stretching is 10 times, and the semi-finished fiber is obtained. The semi-finished fiber is acetalized at a temperature of 50 °C with a concentration of 20g / L glutaraldehyde, and then the fiber is cut, crimped, oiled, and dried to obtain a fiber thread. Short fibers with a density of...

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Abstract

The present invention refers to wearability vinylon and preparation method and application. It is composed of 100 part by weight polyvinyl alcohol with degree of polymerization 1500-3000, alcoholysis degree 92-99 mol per cent, additive 2-6 part by weight, water 400-900 part by weight, adding to dissolution kettle, at temperature 90-120 degree centigrade, pressure 0.02-0.17 MPa, dissolution 6-10 hr, through filtering and debubbling to make spinning raw liquor; utilizing wet spinning, drawing-heat treating, aldehyde concentration 20-80 g / L, acid concentration 20-300 g / L, temperature 50-90 degree centigrade acetalation processing, to make wearability vinylon with linear density being 1.0-10 dtex, rupture strength 7-11 CN / dtex, elongation at break 10-30 per cent, softening temperature in water 110-120 degree centigrade, number of crimp 3.0-5.0 piece / 25 mm. Said short fiber pure spinning or mixed spinning with other fiber to make different count yarn, fabric used as tent gabe, Knapsack or training garment etc.

Description

technical field [0001] The invention relates to a wear-resistant polyvinyl acetal fiber and its preparation method and application, belonging to the field of synthetic fiber preparation. Background technique [0002] Polyvinyl alcohol is a polymer with excellent performance and wide application. The high-performance fiber prepared from it has excellent corrosion resistance, weather resistance, abrasion resistance and good bonding performance with the substrate interface. It is a synthetic fiber It is one of the most promising varieties in China. It is widely used in construction, papermaking, mariculture, non-woven fabrics and other industries. At the same time, the hot water resistance is significantly improved after acetal treatment. It can also be used in clothing, industrial fibers, high-strength ropes and plastics. , Rubber reinforced materials, etc., have great market potential. [0003] There are the following three methods for wet spinning of polyvinyl alcohol fiber...

Claims

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Application Information

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IPC IPC(8): D01F6/14D01D5/06D02J1/12D06M13/137
Inventor 赵寰施楣梧叶光斗何云赵彬黎园徐建军李海英李守群唐庆邢海冷平刘建华魏建平黄世文
Owner SOLDIER SYST RES CENT MILITARY SUPPLY EQUIP INST GENERAL LOGISTICS DEPT PLA
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