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Low-temperature water-soluble polyvinyl alcohol filaments and preparation method thereof

A technology of water-soluble polyvinyl alcohol and polyvinyl alcohol, which is applied in rayon manufacturing, filament molding treatment, single-component synthetic polymer rayon, etc., can solve the difficulty of inorganic salt separation, organic reagent pollution, and polymer phase separation and other problems, to avoid moisture condensation and evaporation, lower melting point, and improve fluidity

Active Publication Date: 2017-06-23
大连天马可溶制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the low-temperature water-soluble raw materials in the prior art, they will gel when they encounter water and are difficult to transport, organic reagents are plasticized to cause pollution, inorganic salts-water plasticized inorganic salts are difficult to separate, and single-water plasticized low-pressure spinning is prone to water vaporization The resulting phase separation of the polymer and water, the product does not matte and other problems

Method used

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  • Low-temperature water-soluble polyvinyl alcohol filaments and preparation method thereof
  • Low-temperature water-soluble polyvinyl alcohol filaments and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Mix polyvinyl alcohol with a degree of polymerization of 1700 and a degree of esterification of 88 and a degree of polymerization of 500 and a degree of esterification of 88 60:40 according to the mass ratio, and stir and wash with 0 degree ice water for 3 times, each time for 30 minutes, Control the moisture content at 40-60%. The ice water is a mixture of ice and water, wherein the proportion (mass fraction) of ice is not less than 10%.

Embodiment 2

[0025] Polyvinyl alcohol with a degree of polymerization of 500 and a degree of esterification of 88 and a degree of polymerization of 1700 with a degree of esterification of 88 were mixed in a mass ratio of 50:50, then stirred and washed with 0-degree ice water for 3 times, each The first wash is 30 minutes, and the water content is controlled at 40-60%. The ice water is a mixture of ice and water, wherein the proportion (mass fraction) of ice is not less than 10%.

Embodiment 3

[0027] Polyvinyl alcohol with a degree of polymerization of 300, a degree of esterification of 88, a degree of polymerization of 500, a degree of esterification of 88, a degree of polymerization of 1700, and a degree of esterification of 88 is relaxed in a mass ratio of 20:30:40, Then stir and wash with 0 degree ice water for 3 times, each time for 30 minutes, and control the water content at 40-60%. The ice water is a mixture of ice and water, wherein the proportion (mass fraction) of ice is not less than 10%.

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Abstract

The invention relates to the field of polyvinyl alcohol fiber, in particular to low-temperature water-soluble polyvinyl alcohol filaments and a preparation method thereof. According to the preparation method, through raw material pretreatment in an ice-water bath, and through a synergistic effect of introduction of a matting agent emulsion and a matting assistant, relay-type melt transportation, high-pressure spinning and other methods, the use of an organic reagent and an inorganic salt is avoided, the problems that a low-temperature water-soluble raw material is gelatinized in water and is difficult to transport, and phase separation between a polymer and water and no matting of a product which are caused by water vaporization easily produced by single water plasticization are generated, are solved, and continuous filaments with the water solution temperature of 20-60 DEG C are obtained.

Description

technical field [0001] The invention relates to the field of polyvinyl alcohol fibers, in particular to a low-temperature water-soluble polyvinyl alcohol filament and a preparation method thereof. Background technique [0002] Polyvinyl alcohol fiber is currently the only water-soluble synthetic fiber that can be produced on a large scale in the world. Its water solubility makes it have many special uses in the fields of medical care, embroidery, and clothing. Since the molecular structure of polyvinyl alcohol contains a large number of hydroxyl groups, its molecular melting point is close to the decomposition temperature, so polyvinyl alcohol fibers can generally only be prepared by solution spinning. The solution spinning process is complicated and the pollution is serious. If the melt spinning of polyvinyl alcohol can be realized, the process can be greatly shortened, the cost can be reduced, and the environmental pollution can be reduced. Hydroxyl groups in water molecu...

Claims

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Application Information

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IPC IPC(8): D01F6/50D01F1/10D01D1/00D01D1/10D01D5/08D01D5/11D01D5/12
CPCD01D1/00D01D1/106D01D5/08D01D5/11D01D5/12D01F1/10D01F6/50
Inventor 郭静刘闻徐德增刘建为
Owner 大连天马可溶制品有限公司