Polyvinyl alcohol fiber and preparation method as well as application thereof

A polyvinyl alcohol fiber and wet spinning technology, which is applied in the fields of fiber chemical characteristics, spinning solution preparation, wet spinning method, etc., can solve problems such as unsatisfactory applications, and achieve good uniformity, simple process, and good stability Effect

Active Publication Date: 2013-04-10
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the construction of bridges and tunnels, due to the arched structure of bridges and tunnels, the overall PVA fiber material is required to have high strength and modulus properties, and the existing PVA fiber material cannot meet the application in these areas.

Method used

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  • Polyvinyl alcohol fiber and preparation method as well as application thereof
  • Polyvinyl alcohol fiber and preparation method as well as application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]Put 1000kg of polyvinyl alcohol with a degree of polymerization of 1820 and a degree of alcoholysis of 99.6mol%, and 5700kg of water, into a stainless steel dissolution kettle, add 1.0-1.2kg of boric acid, and dissolve for 4 hours at a temperature of 98-100°C and a pressure of 0.1pa under stirring Afterwards, it is pumped and filtered, degassed under normal pressure for 480 minutes, and the degassing temperature is 97°C, and the temperature of the spinning stock solution is 97°C; through a metering pump, it is sprayed out through a spinneret with an aperture of 0.2mm and 3000 holes. The ingot is 1000~1100ml / min., directly enters the coagulation bath of sodium hydroxide aqueous solution at 45±2℃, the spinneret is stretched -35 times, and then the fiber is stretched by the godet to a certain extent, then acid bath neutralization, damp heat Stretch 2.0 times, then wash with water to remove Glauber’s salt, sulfuric acid and excess boric acid in the tow, and then oil it, so th...

Embodiment 2～8

[0034] Embodiments 2-8: carried out according to the following process parameters, and others are the same as in Embodiment 1. The following PVA fiber has a linear density of 6.0-10.0dtex, a strength of 11.0-14.0cN / dtex, a modulus of 270-320cN / dtex, and an elongation of 7.0-9.0%. Its uniformity is very good by visual inspection, and it is very suitable for application in the field of bridge and tunnel construction.

[0035]

[0036]

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PUM

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Abstract

The invention discloses a polyvinyl alcohol fiber, which is manufactured by the steps of raw liquid preparation, wet spinning and heat treatment. The polyvinyl alcohol fiber is characterized in that during the step of wet spinning, the specification of the spinneret of a spinneret plate is that meshes are less than or equal to 5000 (preferentially, the meshes are 3000-500), a mesh diameter is 0.125-0.2mm, and an output amount is 1000-1300ml / min; and the thread density of the polyvinyl fiber is 6.0-10.0dtex. According to the PVA (polyvinyl alcohol) fiber, the thread density is 6.0-10.0dtex, the strength is 11.0-14.0cN / dtex, the modulus is 270-320cN / dtex, and the elongation is 7.0-9.0 percent; and the PVA fiber is extremely suitable for application of the construction field of bridges and tunnels. The preparation method of the PVA fiber has a simple process and a mild reaction condition, and is suitable for industrial and scaled production. The prepared PVA fiber has the advantages of good uniformity and excellent stability.

Description

technical field [0001] The invention relates to a polyvinyl alcohol (hereinafter referred to as PVA) fiber and its preparation method and application, in particular to a coarse denier high-strength and high-modulus PVA fiber and its preparation method and application. Background technique [0002] PVA is a polymer with excellent performance and wide range of uses. The high-performance fiber prepared from it has excellent corrosion resistance, weather resistance and good bonding performance at the substrate interface. It is the most promising asbestos in synthetic fibers. As a substitute material, it has a wide range of uses in the construction industry. At the same time, it can also be used as tire cords, industrial fabrics, high-performance ropes, plastics, and rubber reinforcements. It has great market potential. [0003] PVA is a crystalline polymer with a large number of hydroxyl groups in its molecule, which can form a large number of intramolecular and intermolecular h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/06D01D4/02D01D10/02D01D1/02D01D5/14D01F6/50
Inventor 康正周赵彬唐庆魏建平邢海林贵华刘世清黄世文刘进宏
Owner CHINA PETROCHEMICAL CORP
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