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Water-soluble polyvinyl alcohol resin fiber and nonwoven fabric made by using the same

A polyvinyl alcohol-based, water-soluble technology, applied in the chemical characteristics of fibers, textiles, non-woven fabrics, etc., can solve the problems of difficult melt forming, unfavorable dissolving operations, and generation of air bubbles, and achieves anti-foaming and acetic acid odor inhibition. The effect of generating and improving fiber strength

Active Publication Date: 2009-03-04
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when using the current partial saponification type and complete saponification type PVA, there are the following problems: problems associated with the generation of acetic acid odor, problems difficult to melt molding, and bubbles generated during water dissolution, which is not conducive to the problem of dissolution work, In this way, practically no material suitable for use as a non-woven fabric forming material has been obtained.

Method used

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  • Water-soluble polyvinyl alcohol resin fiber and nonwoven fabric made by using the same
  • Water-soluble polyvinyl alcohol resin fiber and nonwoven fabric made by using the same
  • Water-soluble polyvinyl alcohol resin fiber and nonwoven fabric made by using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] (Production of water-soluble PVA-a)

[0101] In the reaction still equipped with reflux condenser, dropping funnel, stirrer, drop into vinyl acetate 1500g, methyl alcohol 2100g, 3,4-diacetoxy-1-butene 180g (with respect to the 6 mol% acetic acid that drops into Vinyl ester), 0.05 mol% of azobisisobutyronitrile was added, and the temperature was raised under nitrogen flow while stirring to start polymerization. When the polymerization rate of vinyl acetate reaches 80%, m-dinitrobenzene is added according to the specified amount to terminate the polymerization, and then, the unreacted vinyl acetate monomer is removed from the system by blowing methanol vapor to obtain a copolymerization methanol solution of the substance.

[0102] Then, the above methanol solution was diluted with methanol, adjusted to a concentration of 35%, and then it was put into a kneader, and the temperature of the solution was kept at 40° C., while the vinyl acetate structural unit in the copolyme...

Embodiment 2

[0106] The water-soluble PVA-a was blended with 5% of glycerin as a plasticizer as a whole, and the resulting material was prepared as a fiber-forming material, and used for melt spinning. In addition, the melting point of the aforementioned fiber-forming material was 177°C.

Embodiment 3

[0108] 10% of glycerin as a plasticizer was blended with the above-mentioned water-soluble PVA-a, and the resulting material was prepared as a fiber-forming material and subjected to melt spinning. In addition, the melting point of the aforementioned fiber-forming material was 172°C.

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Abstract

A water-soluble polyvinyl alcohol resin fiber obtained by melt-spinning a material containing as the main component a water-soluble polyvinyl alcohol resin having 1,2-diol structural units represented by the general formula (1); and nonwoven fabrics made by using the fiber. The resin is excellent in the solubility in water at low temperature and is depressed in the bubbling as observed in being dissolved in water. Additionally, the invention permits the use of completely saponified PVA in melt forming, which brings about a depression in the production of acetic acid smell and an improve in the working atmosphere: [Chemical formula 1] (1) wherein R<1>, R<2>, R<3>, R<4>, R<5> and R<6> are each hydrogen or a monovalent organic group and may be the same or different from each other; and X is a single bond or a connecting chain].

Description

technical field [0001] The present invention relates to the application of embroidery substrates such as chemical lace, automobiles and other injury protection materials, filters, and non-woven fabric forming materials such as medical surgical gowns, which are excellent in solubility at low temperatures and have good handling properties. Fibers made of water-soluble polyvinyl alcohol-based resin (hereinafter referred to as "water-soluble PVA") and non-woven fabrics using the fibers. Background technique [0002] Conventionally, fibers made of water-soluble resins and woven or non-woven fabrics using the fibers have been used in various applications. Among them, fiber products molded using PVA are used in various fields due to their high tensile strength. [0003] A non-woven fabric formed using such PVA is known, for example, to form a non-woven fabric by spinning PVA by a wet spinning method. Even if the current nonwoven fabric obtained in this way is made of water-solubl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/50C08F16/04D04H1/42D04H3/14C08F8/12C08F16/06D01F6/14D04H1/4309D04H3/007
CPCD01F6/34D04H3/14D01F6/14D04H3/02C08F216/1416Y10T428/298Y10T442/60
Inventor 涩谷光夫酒井纪人
Owner MITSUBISHI CHEM CORP
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