Preparation method of high-strength and high-modulus polyvinyl alcohol fine fiber

A technology of polyvinyl alcohol and fine denier fibers, which is applied in the fields of fiber chemical characteristics, spinning solution preparation, wet spinning, etc., to achieve the effects of improving production stability, increasing hydrogen bond force, and increasing breaking strength

Active Publication Date: 2016-11-09
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

None of the above-mentioned fiber products can meet this requirement.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The preparation method of high strength, high modulus polyvinyl alcohol fine denier fiber in the present embodiment is as follows:

[0037] 1. Preparation of spinning stock solution

[0038] Mix 12 parts by mass of polyvinyl alcohol resin with a degree of polymerization of 1700 and a degree of alcoholysis ≥99% and 88 parts by mass of deionized water, dissolve at 101°C for 5 hours to obtain a polyvinyl alcohol solution, and then add 1 wt% of boric acid and 0.01 wt% of carbolic acid wt% and 0.3wt% of polyether defoamer, adjust the pH value to 4.2 with acetic acid, then filter through a metal filter with a filtration accuracy of 10 μm and leave it for defoaming for 5 hours to obtain the spinning stock solution;

[0039] 2. Solidification molding

[0040] After the spinning stock solution is metered by a metering pump, the spinneret with an aperture of 0.065mm is used for spinning, and the filaments are solidified and formed in a coagulation bath; 340 g / L of sodium sulfate...

Embodiment 2

[0049] The preparation method of high strength, high modulus polyvinyl alcohol fine denier fiber in the present embodiment is as follows:

[0050] 1. Preparation of spinning stock solution

[0051] Mix 17 parts by mass of polyvinyl alcohol resin with a degree of polymerization of 2000 and a degree of alcoholysis ≥99% and 83 parts by mass of deionized water, dissolve at 115°C for 6 hours to obtain a polyvinyl alcohol solution, and then add 2 wt% of boric acid and 0.02 wt% of carbolic acid wt% and 0.4wt% of polyether defoamer, adjust the pH value to 4.5 with acetic acid, then filter through a metal filter with a filtration accuracy of 10 μm and leave it for defoaming for 6 hours to obtain the spinning stock solution;

[0052] 2. Solidification molding

[0053] After the spinning stock solution is metered by a metering pump, the spinneret with an aperture of 0.09mm is used for spinning, and the filaments are solidified and formed in a coagulation bath; 380 g / L of sodium sulfate ...

Embodiment 3

[0062] The preparation method of high strength, high modulus polyvinyl alcohol fine denier fiber in the present embodiment is as follows:

[0063] 1. Preparation of spinning stock solution

[0064] Mix 15 parts by mass of polyvinyl alcohol resin with a degree of polymerization of 1785 and a degree of alcoholysis ≥99% with 85 parts by mass of deionized water, dissolve at 105°C for 5.5 hours to obtain a polyvinyl alcohol solution, and then add 1.2 wt% boric acid and carbolic acid 0.01wt% and polyether defoamer 0.33wt%, adjust the pH value to 4.5 with sulfuric acid, then filter through a metal filter with a filtration accuracy of 10 μm, and then stand for defoaming for 6.5 hours to obtain the spinning stock solution;

[0065] 2. Solidification molding

[0066] The spinning stock solution is metered by a metering pump and then spun through a spinneret with an aperture of 0.07 mm, and the filaments are solidified and formed in a coagulation bath; 350 g / L of sodium sulfate and 11 g...

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Abstract

The invention relates to a preparation method of high-strength and high-modulus polyvinyl alcohol fine fiber. The polyvinyl alcohol fine fiber is produced by virtue of a boron-bearing gel wet spinning process and is prepared through the steps of spinning dope preparation, solidification formation, hygrothermal stretching and drying formation. According to the polyvinyl alcohol fine fiber prepared by virtue of the preparation method, the tensile strength is more than or equal to 12.5CN/dtex, the elasticity modulus is more than or equal to 280CN/dtex, the incipient melting temperature is more than or equal to 105 DEG C, the linear density is 0.56-1.10dtex, and the breaking elongation is 5-8%; the specific surface area is large, by adding a small amount of the polyvinyl alcohol fine fiber in a papermaking process, the hydrogen bond action force among fibers of formed paper can be substantially enhanced, the tension of the formed paper is large, the filterability and the flexibility of the formed paper are improved, especially the humidity resistance and the breaking strength are increased, and the shrinking percentage in hot water of 95 DEG C can be controlled below 1.5%, so that the polyvinyl alcohol fine fiber can be widely applied to fields of paper for building coverage layers, drug packaging and securities and other special fields.

Description

1. Technical field [0001] The invention relates to a preparation method of polyvinyl alcohol fibers, in particular to a preparation method of high-strength, high-modulus polyvinyl alcohol fine denier fibers. 2. Background technology [0002] Polyvinyl alcohol (PVA) fibers are widely used in textiles, clothing fabrics, concrete reinforcement, papermaking and other fields due to their unique physical and chemical properties, and they are non-toxic and harmless during use and can be naturally degraded. [0003] The production methods of polyvinyl alcohol include melt spinning method and solution spinning method. At present, the main production method used is solution spinning method, and solution spinning method is divided into wet spinning method and dry spinning method. Among them, the solvent of wet spinning can be water or organic solvent, such as the water-soluble polyvinyl alcohol fiber produced by Japan's Kuraray Company, the solvent of its stock solution is methanol, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/50D01F1/10D01D1/02D01D5/06D01D5/14D01D10/06
CPCD01D1/02D01D5/06D01D5/14D01D10/06D01F1/10D01F6/50
Inventor 吴福胜崔明发王平林吴建军陈思鹏秦旱生田宗杰许守清
Owner ANHUI WANWEI UPDATED HIGH TECH MATERIAL CO LTD
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