Water-soluble food packaging film
A food packaging, water-soluble technology, applied in the chemical industry, can solve the problems of food packaging bag pollution, etc., achieve the effect of reducing the pressure caused by the environment, good strength, easy to promote and use on a large scale
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Embodiment 1
[0023] The following components are calculated by weight ratio: 10 parts of polyvinyl alcohol (polymerization degree: 5000), 30 parts of oxidized starch, 0.5 parts of wood flour, 1 part of dioctyl phthalate, 0.5 parts of CPE, 1.5 parts of metal, 4 parts of linear polyethylene and 0.2 parts of titanium dioxide.
[0024] The present invention also provides the preparation method of water-soluble food packaging film, is characterized in that, comprises the following steps:
[0025] (1) Measure each component according to the formula, mix and stir, adopt back distillation method, control the temperature at 100°C, dissolve the material completely, and obtain the mixed solution;
[0026] (2) Put the mixed solution at 100°C for 1 hour, pour it into a flat-flow mold preheated to 100°C, and cast it onto a mirror steel plate at room temperature, so that the mixed solution is rapidly cooled and gelled, and then peeled off from the steel plate. Water-soluble food packaging film.
Embodiment 2
[0028] The following components are calculated by weight ratio: 50 parts of polyvinyl alcohol (polymerization degree: 10000), 80 parts of oxidized starch, 5 parts of diatomaceous earth, 10 parts of dibutyl phthalate, 5 parts of MBS, 8 parts of metallocene 1 part, 8 parts of linear polyethylene and 1 part of zinc oxide.
[0029] The present invention also provides the preparation method of water-soluble food packaging film, is characterized in that, comprises the following steps:
[0030] (1) Measure each component according to the formula, mix and stir, adopt back distillation method, control the temperature at 150°C, dissolve the material completely, and obtain the mixed solution;
[0031] (2) Put the mixed solution at 130°C for 2 hours, pour it into a flat-flow mold preheated to 100°C, and cast it on a mirror steel plate at room temperature, so that the mixed solution is rapidly cooled and gelled, and then peeled off from the steel plate to obtain Water-soluble food packagi...
Embodiment 3
[0033] The following components are calculated by weight ratio: 30 parts of polyvinyl alcohol (polymerization degree: 8000), 50 parts of oxidized starch, 1.5 parts of asbestos, 3 parts of diisodecyl phthalate, 2 parts of ABS, and 3 parts of metallocene , 5 parts of linear polyethylene and 0.5 parts of lithopone.
[0034] The present invention also provides the preparation method of water-soluble food packaging film, is characterized in that, comprises the following steps:
[0035] (1) Measure each component according to the formula, mix and stir, adopt back distillation method, control the temperature at 120°C, dissolve the material completely, and obtain the mixed solution;
[0036] (2) Let the mixed solution stand at 125°C for 1.5h, pour it into a flat-flow mold preheated to 95°C, and cast it on a mirror steel plate at room temperature, so that the mixed solution is rapidly cooled and gelled, and peeled off from the steel plate to make Water-soluble food packaging film.
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