Degradable composite film and preparation method thereof
A composite film and raw material technology, applied in the field of degradable composite film and its preparation, can solve the problems of natural degradation of pollution, environmental pollution, increase of plastic film, etc., achieve simple preparation process, avoid white pollution, improve strength and toughness Effect
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[0022] Example 1
[0023] A degradable composite film consisting of the following raw materials by weight: 35 parts of polylactic acid, 15 parts of polyvinyl alcohol, 18 parts of starch, 12 parts of corn stover powder, 8 parts of chitosan, 14 parts of lignocellulose, light 7 parts of high-quality calcium carbonate, 4 parts of diatomaceous earth, 7 parts of vermiculite powder, 3 parts of zinc oxide, 2 parts of epoxy soybean oil, 0.5 parts of defoamer; wherein the starch is at least one of corn starch, potato flour, and sweet potato flour Kind.
[0024] A method for preparing a degradable composite film includes the following steps:
[0025] (1) Weigh the respective raw materials in corresponding parts by weight;
[0026] (2) Add polylactic acid, polyvinyl alcohol, starch, corn stover powder, chitosan, and lignocellulose into the mixer. The heating temperature is 80℃, the speed is 50r / min, and the heating time is 20min; then add light High-quality calcium carbonate, diatomaceous earth...
Example Embodiment
[0029] Example 2
[0030] A degradable composite film consisting of the following raw materials by weight: 45 parts of polylactic acid, 22 parts of polyvinyl alcohol, 25 parts of starch, 17 parts of corn stalk powder, 13 parts of chitosan, 20 parts of lignocellulose, light 13 parts of high-quality calcium carbonate, 9 parts of diatomaceous earth, 12 parts of vermiculite powder, 8 parts of zinc oxide, 7 parts of epoxidized soybean oil, 3 parts of defoamer; wherein the starch is at least one of corn starch, potato flour, and sweet potato flour Kind.
[0031] A method for preparing a degradable composite film includes the following steps:
[0032] (1) Weigh the respective raw materials in corresponding parts by weight;
[0033] (2) Add polylactic acid, polyvinyl alcohol, starch, corn stover powder, chitosan, and lignocellulose into the mixer. The heating temperature is 90℃, the rotation speed is 60r / min, and the heating time is 30min; then add light Calcium carbonate, diatomaceous eart...
Example Embodiment
[0036] Example 3
[0037] A degradable composite film composed of the following raw materials in parts by weight: 38 parts of polylactic acid, 18 parts of polyvinyl alcohol, 20 parts of starch, 14 parts of corn straw powder, 10 parts of chitosan, 16 parts of lignocellulose, light 9 parts of high-quality calcium carbonate, 6 parts of diatomaceous earth, 9 parts of vermiculite powder, 5 parts of zinc oxide, 4 parts of epoxy soybean oil, 1 part of antifoaming agent; wherein the starch is at least one of corn starch, potato flour, and sweet potato flour Kind.
[0038] A method for preparing a degradable composite film includes the following steps:
[0039] (1) Weigh the respective raw materials in corresponding parts by weight;
[0040] (2) Add polylactic acid, polyvinyl alcohol, starch, corn stover powder, chitosan, and lignocellulose into the mixer. The heating temperature is 85°C, the rotation speed is 55r / min, and the heating time is 25min; then add light Calcium carbonate, diatomac...
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