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70 DEG C water-soluble polyvinyl alcohol fiber with small dissolution range and preparation method thereof

A polyvinyl alcohol fiber, water-soluble technology, applied in the direction of fiber chemical characteristics, wet spinning method, single-component synthetic polymer rayon, etc., can solve the problem of unclean textile fabrics, difficult textile fiber removal process, drying temperature, etc. Difficult to control and other problems, to achieve the effect of facilitating diffusion, easy industrialization and good spinnability

Active Publication Date: 2015-06-10
CHINA PETROCHEMICAL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This has a long dissolution range, and when it is used in textile and papermaking, it makes the textile de-dimensionalization process very difficult, and it is difficult to control the drying temperature in the paper-making process, so that the de-dimensionalization of the textile fabric is not clean and the strength of the paper page is sometimes large and sometimes small. uneven problem

Method used

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  • 70 DEG C water-soluble polyvinyl alcohol fiber with small dissolution range and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of water-soluble PVA fiber with a small dissolution range of 70°C is carried out according to the following steps:

[0032] Weigh 5 grams of acrylamide and dissolve it in 90 grams of methanol, then weigh 5 grams of sodium hydroxide and add it to the above mixed solution, and stir evenly to prepare a modified solution.

[0033] Add an appropriate amount of PVA1799 to a mixed solution of dimethyl sulfoxide and methanol with a mass percentage of 92:8, and react at a temperature of 99°C for 3 hours to prepare a spinning stock solution with a concentration of 16%; the spinning stock solution is filtered at 99°C, detached The foam is transported to the spinneret with a diameter of 0.08mm by a metering pump, and then sprayed out through the spinneret into a methanol condensation bath at -15~5°C to form a gel to form a primary fiber; the primary fiber enters the modified solution and is treated at room temperature for 30 seconds. After 3 times stretching, i...

Embodiment 2

[0038] A preparation method of water-soluble PVA fiber with a small dissolution range of 70°C is carried out according to the following steps:

[0039] Weigh 10 grams of acrylamide and dissolve it in 85 grams of methanol, then weigh 5 grams of sodium ethoxide and add it to the above mixed solution, and stir evenly to make a modified solution.

[0040] Add an appropriate amount of PVA1799 to a mixed solution of dimethyl sulfoxide and methanol with a mass percentage of 92:8, and react at a temperature of 99°C for 2 hours to prepare a spinning stock solution with a concentration of 16%; the spinning stock solution is filtered at 99°C and removed. The foam is transported to the spinneret with a diameter of 0.08mm by a metering pump, and then sprayed out through the spinneret into a methanol condensation bath at -15~5°C to form a gel to form a primary fiber; the primary fiber enters the modified solution and is treated at room temperature for 30 seconds. After 3 times stretching, i...

Embodiment 3-8

[0044] Example 3-8 : Carry out by following processing parameter, other is all identical with embodiment 1. The prepared 70°C water-soluble PVA fiber has a dissolution range less than 30°C and has a small shrinkage rate in water.

[0045]

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Abstract

The invention relates to a 70 DEG C water-soluble polyvinyl alcohol fiber with small dissolution range, which is prepared by the steps of basic solution preparation and spinning. The invention is characterized in that a nascent fiber obtained through spinning is modified after the spinning step, and a modifying solution used for the modification treatment is a methanol solution of acrylamide and base catalyst. The dissolution range of the 70 DEG C water-soluble PVA fiber is small and can reach 10 DEG C, the shrinkage percentage in water is small, and the 70 DEG C water-soluble PVA fiber is especially applicable to the fields of papermaking, textiles and the like. The wet gel spinning technique is adopted for spinning in the preparation method, and the technique has mature technology, good spinnability and high production efficiency. Meanwhile, the entire preparation method has simple technique, convenience for operation and easiness in industrial popularization.

Description

technical field [0001] The present invention relates to a water-soluble polyvinyl alcohol (hereinafter referred to as PVA) fiber, in particular to a 70°C water-soluble PVA fiber and its preparation method. Background technique [0002] Polyvinyl alcohol has been used for a long time to manufacture vinylon, but some inherent defects of vinylon itself (poor dyeability, poor hot water resistance, etc.) have hindered its further development as a fiber for clothing, and the development of water-soluble PVA fiber Production has opened up a new way for the application of polyvinyl alcohol. As a major producer of polyvinyl alcohol and clothing fabrics, my country has rich sources of raw materials and sales markets for polyvinyl alcohol water-soluble fibers. Most of the water-soluble PVA fibers currently on the market have the disadvantages of large water shrinkage and wide dissolution range. [0003] The 70°C water-soluble PVA fiber is prepared by steps including stock solution prep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/14D01F11/06D01D5/06D01D10/02
Inventor 徐建军李海英叶光斗何云姜猛进冷平李守群王华全晏明王建刘婵李黎
Owner CHINA PETROCHEMICAL CORP