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High-strength, high-modulus and high-melting point PVA (Polyvinyl Acetate) fiber and manufacturing method thereof

A high-modulus, high-melting-point technology, applied in rayon manufacturing, fiber chemical characteristics, wet spinning, etc., can solve the problem of no large-scale industrialized equipment, and achieve the effect of increasing the draw ratio

Active Publication Date: 2012-02-01
ANHUI WANWEI UPDATED HIGH TECH MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gel method has difficulties such as solvent recovery, and currently there is no large-scale industrialized device
In the existing boron-containing wet process, PVA resin with an average degree of polymerization of PA=1700 is used as raw material, and a certain amount of boron additive is added when preparing the spinning dope, so that the total stretching ratio of the fiber post-treatment reaches 10.0-11.0 times. The fiber strength is about 11CN / dtex, the modulus is 230-280CN / dtex, and the initial melting point is 100-103°C, but such products are still difficult to meet the needs of special fields

Method used

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  • High-strength, high-modulus and high-melting point PVA (Polyvinyl Acetate) fiber and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Raw material PVA: polymerization degree 1720, residual acetate 0.21%, sodium acetate after washing 0.23%; additive preparation: H 3 BO 3 1.35%, CuSO 4 0.05%; dissolution: dissolution temperature 97°C, dissolution time 110 minutes, stock solution concentration 16.8%; defoaming: defoaming temperature 98°C, defoaming time 4 hours; spinning: spinning coagulation bath NaOH18g / l, NaOH 2 SO 4 310g / l, H 3 BO 3 5.5g / l, negative stretching in bath -20.8%, spinning air bath stretching 2.08 times; neutralization, wet drafting: neutralization, wet drafting coagulation bath Na 2 SO 4 310g / l, H 2 SO 4 12g / l, wet heat stretching 2.3 times, wet heat stretching 85°C; preheating, stretching: preheating temperature 225°C, stretching dry stretching 2.93 times, stretching oven temperature 212°C;

[0030] The main technical quality index of embodiment 1PVA fiber is as follows:

[0031] Indicator name

Embodiment 2

[0033] Raw material PVA: polymerization degree 1820, residual acetate 0.35%, sodium acetate 0.2% after washing; additive preparation: H 3 BO 3 1.52%, CuSO 4 0.05%; dissolution: dissolution temperature 98°C, dissolution time 120 minutes, stock solution concentration 16.0%; defoaming: defoaming temperature 98°C, defoaming time 4.5 hours; spinning: spinning coagulation bath NaOH35g / l, Na 2 SO 4 330g / l, H 3 BO 3 6.5g / l, negative stretching in bath -30.8%, spinning air bath stretching 2.08 times; neutralization, wet drafting: neutralization, wet drafting coagulation bath Na 2 SO 4 330g / l, H 2 SO 4 40g / l, wet heat stretching 2.0 times, wet heat stretching 88°C; preheating, stretching: preheating temperature 225°C, stretching dry stretching 3.44 times, stretching oven temperature 228°C;

[0034] The main technical quality index of embodiment 2PVA fiber is as follows:

[0035] Indicator name

Embodiment 3

[0037] Raw material PVA: polymerization degree 1950, residual acetate 0.28%, sodium acetate 0.40% after washing; additive configuration: H 3 BO 3 1.25%, CuSO 4 0.08%; dissolution: dissolution temperature 99°C, dissolution time 120 minutes, stock solution concentration 15.8%; defoaming: defoaming temperature 99°C, defoaming time 5 hours; spinning: spinning coagulation bath NaOH45g / L, Na 2 SO 4 330g / L, H 3 BO 3 6g / L, negative stretching in bath -29.9%, spinning air bath stretching 2.06 times; neutralization, wet drafting: neutralization, wet drafting coagulation bath Na 2 SO 4 340g / L, H 2 SO 4 50g / L, wet heat stretching 2.5 times, wet heat stretching 92°C; preheating, stretching: preheating temperature 230°C, stretching dry stretching 2.8 times, stretching oven temperature 220°C;

[0038] The main technical quality index of embodiment 3PVA fiber is as follows:

[0039] Indicator name

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Abstract

The invention provides a high-strength, high-modulus and high-melting point PVA (Polyvinyl Acetate) fiber which is a PVA fiber manufactured by using a boron-containing gel wet spinning method, wherein the strength is larger than or equal to 13.5 CN / dtex, the modulus is larger than or equal to 320 CN / dtex, the initial melting point is larger than or equal to 108 DEG C, and the total stretching multiple is 13.0-14.5 times. The product has the advantages of excellent performance and wider application range so as to be especially suitable for being used in the field of high-end industry.

Description

1. Technical field [0001] The invention relates to a synthetic fiber and a preparation method thereof, in particular to a polyvinyl alcohol (PVA) fiber and a preparation method thereof, more specifically to a high-strength, high-modulus, high-melting-point PVA fiber and a preparation method thereof. 2. Background technology [0002] The use of PVA fiber is closely related to its properties such as strength, modulus, and melting point. Fibers with a strength of 3-5CN / dtex, a modulus of 60-80CN / dtex, and an initial melting point of 85-90°C are mostly used for civilian use; fibers with a strength of 10-11CN / dtex, a modulus of 220-250CN / dtex, and an initial melting point of 100°C are mostly used in general Reinforcement of cement products; PVA fibers with higher performance are not only used for reinforcement of cement products, but also can be used for reinforcement of high-performance concrete, highway asphalt, plastics, and rubber. [0003] The manufacturing methods of PVA f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/50D01F1/10D01D1/02
CPCD01D1/02D01F1/10D01F6/14D01F6/50D01D5/06
Inventor 吴福胜高祖安李康荣季学勇崔明发黄荣海冯加芳姜家保陈思鹏
Owner ANHUI WANWEI UPDATED HIGH TECH MATERIAL CO LTD
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