Blow molded water-soluble polyvinyl alcohol thin film and preparation method and application thereof

A technology of polyvinyl alcohol film and blow molding, which is applied in the field of blow-molded water-soluble polyvinyl alcohol film and its preparation, which can solve the problems of high energy consumption, long production cycle, and low production efficiency, and achieve simple preparation process , High production efficiency and stable effect

Active Publication Date: 2019-03-12
广东省科学院生物与医学工程研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, water-soluble polyvinyl alcohol film is mainly formed by solution casting. This forming process and formula are simple and easy to operate, but the disadvantages of long production cycle, low production efficiency and high energy consumption have always limited the development of this process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 100 parts of polyvinyl alcohol, 5 parts of polyvinylpyrrolidone, 1 part of sodium lauryl sulfate, 0.5 parts of antioxidant, and 0.5 parts of heat stabilizer into a high-speed mixer and stir for 5 minutes, mix evenly, and heat up to 80 ° C. Compound plasticizer (the mass ratio of glycerin / ethylene glycol / N-methylpyrrolidone / trishydroxymethylaminomethane is 1:1:0.5:0.5) 30 parts, water-soluble inorganic salt solution (water-soluble inorganic 5 parts of salt, 5 parts of water), and slowly add them dropwise into the high-speed mixer one by one for about 10 minutes, continue to mix at high speed for 15 minutes, then add thermoplastic starch and mix evenly, take out the package, leave it for a period of time to mature, and then use Twin-screw extruder, extruded and granulated at a controlled temperature of 120-175°C to obtain thermoplastic polyvinyl alcohol resin, heated to a molten state, and blown into a film blowing machine at 120-175°C By means of thermoplastic proces...

Embodiment 2

[0030] Add 100 parts of polyvinyl alcohol, 5 parts of polyvinylpyrrolidone, 1 part of sodium lauryl sulfate, 0.5 parts of antioxidant, and 0.5 parts of heat stabilizer into a high-speed mixer and stir for 5 minutes, mix evenly, and heat up to 80 ° C. Compound plasticizer (the mass ratio of glycerol / ethylene glycol / N-methylpyrrolidone / trishydroxymethylaminomethane is 1:1:0.4:0.4) 35 parts, water-soluble inorganic salt solution (water-soluble inorganic 5 parts of salt, 5 parts of water), and slowly add them dropwise into the high-speed mixer one by one for about 10 minutes, continue to mix at high speed for 15 minutes, then add thermoplastic starch and mix evenly, take out the package, leave it for a period of time to mature, and then use Twin-screw extruder, extruded and granulated at a temperature of 120-175°C to obtain a thermoplastic polyvinyl alcohol resin, heated to a molten state, and blown into a film blown at a temperature of 120-175°C By means of thermoplastic processi...

Embodiment 3

[0033] Add 100 parts of polyvinyl alcohol, 5 parts of polyvinylpyrrolidone, 1 part of sodium lauryl sulfate, 0.5 parts of antioxidant, and 0.5 parts of heat stabilizer into a high-speed mixer and stir for 5 minutes, mix evenly, and heat up to 80 ° C. Compound plasticizer (the mass ratio of glycerol / ethylene glycol / N-methylpyrrolidone / trishydroxymethylaminomethane is 1:1:0.4:0.4) 35 parts, water-soluble inorganic salt solution (water-soluble inorganic 10 parts of salt, 5 parts of water), and slowly add them dropwise into the high-speed mixer one by one. The dropping time is about 10 minutes, and continue to mix at high speed for 15 minutes. Then add thermoplastic starch and mix evenly. Twin-screw extruder, extruded and granulated at a temperature of 120-175°C to obtain a thermoplastic polyvinyl alcohol resin, heated to a molten state, and blown into a film blown at a temperature of 120-175°C By means of thermoplastic processing to make water-soluble polyvinyl alcohol film.

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Abstract

The invention belongs to the technical field of polyvinyl alcohol thin films, and discloses a blow molded water-soluble polyvinyl alcohol thin film and a preparation method and application thereof. The blow molded water-soluble polyvinyl alcohol thin film is prepared from the following components in parts by weight: 100 parts of polyvinyl alcohol resin, 30 to 50 parts of a compound plasticizer, 5to 20 parts of thermoplastic starch, 1 to 20 parts of water-soluble inorganic salt, 1 to 10 parts of water, 1 to 10 parts of a water-soluble additive, 0.05 to 2 parts of a surfactant, 0 to 0.5 part ofan antioxidant, and 0 to 0.5 part of a thermal stabilizer, wherein the compound plasticizer is a complex of glycerin, triethylene glycol, N-methyl pyrrolidone and polyhydroxy compound containing amino function groups. The blow molded water-soluble polyvinyl alcohol thin film has the advantages that the melting and extrusion blowing molding method is adopted; the preparation technology is simple,and the production efficiency is high; the air blocking property and mechanical property are better; the blow molded water-soluble polyvinyl alcohol thin film can be completely and quickly dissolved in water at normal temperature, and can be applied to water-soluble product packages of pesticides, detergents, water treatment agents and the like.

Description

technical field [0001] The invention belongs to the technical field of polyvinyl alcohol films, and in particular relates to a blow-molded water-soluble polyvinyl alcohol film and a preparation method and application thereof. Background technique [0002] With the development of science and changes in the environment, people's awareness of environmental protection is gradually increasing, and the requirements for packaging materials are becoming more and more stringent. In addition to requiring materials to be environmentally friendly materials, they are also required to not produce secondary pollution. In order to prevent the precipitation of packaged items such as pesticides, the packaging material must have excellent barrier properties, will not cause harm to the human body during use, and will not produce white pollution when it becomes waste after use. Polyvinyl alcohol (PVA) is a water-soluble polymer, which is widely used as a packaging film material because of its ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L3/02C08K5/053C08K5/06C08K5/17C08K5/3415C08J5/18
CPCC08J5/18C08J2329/04C08J2403/02C08K5/053C08K5/06C08K5/17C08K5/3415
Inventor 李发勇陈骏佳谢东陈明周沈华艳张会平
Owner 广东省科学院生物与医学工程研究所
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