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
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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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