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A kind of heat-resistant type pva fiber and its application

A fiber and temperature-resistant technology, applied in the field of high-temperature-resistant PVA fibers and applications, can solve the problems of high temperature resistance, shrinkage or even decomposition of PVA fibers, and inability to guarantee mechanical properties, and achieve the effect of high mechanical strength and high temperature resistance.

Active Publication Date: 2019-08-30
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Conventional PVA fibers will seriously shrink or even decompose under high temperature environment, and the mechanical properties cannot be guaranteed, so there is a defect of not being resistant to high temperature
There is no technical solution that can solve the high temperature resistance of PVA fiber in the existing disclosed technology

Method used

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  • A kind of heat-resistant type pva fiber and its application
  • A kind of heat-resistant type pva fiber and its application
  • A kind of heat-resistant type pva fiber and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: PVA with a degree of polymerization of 1500 and a degree of alcoholysis of 99% (mol) is dissolved successively, spinned, coagulated in a coagulation bath, wet heat stretched, heat-set, and then the fiber is subjected to secondary hydroformylation at normal temperature. For the first time, acetaldehyde is used for formaldehyde, and the formaldehyde solution is composed of acetaldehyde, concentrated sulfuric acid, sodium sulfate and water, wherein the concentration of acetaldehyde is 80g / L, the concentration of concentrated sulfuric acid is 140g / L, and the concentration of sodium sulfate is 200g / L , the temperature of the hydroformylation solution is 75°C, the time of the hydroformylation is 45 minutes, and the second time it is hydroformylated with succinic dialdehyde. L, the concentration of glacial acetic acid is 250g / L, the concentration of zinc oxide is 80g / L, the temperature of the hydroformylation solution is 80°C, and the time of hydroformylation is 30 m...

Embodiment 2

[0037] Example 2: PVA with a degree of polymerization of 2000 and a degree of alcoholysis of 90% (mol) is dissolved successively, spinned, coagulated in a coagulation bath, wet-heat stretched, heat-set, and then the fibers are subjected to secondary hydroformylation. Carry out hydroformylation with the composition of acetaldehyde and crotonaldehyde for the first time, the hydroformylation liquid is made up of acetaldehyde, crotonaldehyde, concentrated sulfuric acid, sodium sulfate and water, wherein the total concentration of the composition of acetaldehyde and crotonaldehyde is 70g / L, the concentration of concentrated sulfuric acid is 180g / L, the concentration of sodium sulfate is 180g / L, the temperature of the hydroformylation solution is 65°C, the hydroformylation time is 50 minutes, and the molar ratio of acetaldehyde to crotonaldehyde is 5:2. For the second time, the composition of succinaldehyde and glyoxal is used for hydroformylation, and the hydroformylation solution i...

Embodiment 3

[0044]Example 3: PVA with a degree of polymerization of 2400 and a degree of alcoholysis of 88% (mol) was dissolved successively, spinned, coagulated in a coagulation bath, wet heat stretched, heat-set, and then the fiber was subjected to secondary hydroformylation at normal temperature. Carry out hydroformylation with the composition of acetaldehyde and crotonaldehyde for the first time, the hydroformylation liquid is made up of acetaldehyde, crotonaldehyde, concentrated sulfuric acid, sodium sulfate and water, wherein the total concentration of the composition of acetaldehyde and crotonaldehyde is 80g / L, the concentration of concentrated sulfuric acid is 120g / L, the concentration of sodium sulfate is 150g / L, the temperature of the hydroformylation solution is 55°C, the hydroformylation time is 30 minutes, the molar ratio of acetaldehyde to crotonaldehyde is 3:2, the second For the second time, the composition of succinaldehyde and glyoxal is used for hydroformylation, and the...

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Abstract

The invention discloses a temperature resistance type PVA (Polyvinyl Alcohol) fiber. The PVA fiber is of a structural formula M as shown in the description and a structural formula N as shown in the description, wherein R represents a formula as shown in the description; q is equal to 2 to 8; the molar ratio of m to n is (0.5 to 8) to (15 to 30); the molar quantity of n accounts for 15 to 35 percent of the total molar quantity of the PVA fiber. The PVA fiber provided by the invention has the single-fiber linear density of 1.2dtex to 1.6dtex, the break elongation of 10 percent to 25 percent and the modulus of 90cN / dtex to 200cN / dtex at normal temperature; the slenderness ratio of the PVA fiber is 250 to 600. The PVA fiber is resistant to the hot-water temperature of 120 DEG C to 180 DEG C, and has relatively high temperature resistance and dispersity and high mechanical strength.

Description

technical field [0001] The invention relates to a PVA fiber, in particular to a high temperature resistant PVA fiber and its application. Background technique [0002] PVA (polyvinyl alcohol) fiber is a kind of fiber with excellent performance, which has the characteristics of high strength, high modulus, low elongation, etc., as well as excellent wear resistance, impact resistance, seawater corrosion resistance, weather resistance, dispersion It is widely used as nets for shallow sea laver cultivation, high-performance ropes, tire cords, industrial fabrics, cement reinforcement materials, and plastic and rubber reinforcement materials, etc., with broad market potential . [0003] In recent years, researchers at home and abroad have continued to carry out a lot of research on PVA fibers. CN200510057435, a method for preparing high-performance polyvinyl alcohol fibers, using a compound modifier composed of nitrogen-containing compounds, hydrophilic auxiliary additives and w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/14D01F11/06C04B16/06C09K8/44C09K8/508C09K8/68C09K8/88
Inventor 王华全王建向鹏伟周霖刘婵
Owner CHINA PETROCHEMICAL CORP