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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

Inactive Publication Date: 2017-03-15
安徽省天乐塑业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the increase in the use of plastic film products, a lot of pollution has been brought to the natural environment. Conventional plastic film products, such as plastic films made of polypropylene, polyvinyl chloride, polyethylene, etc., are polluted and naturally degraded in the natural environment. After being placed for many years, they still exist in the natural environment, and these non-degradable plastic films increase the pollution of the environment

Method used

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  • Degradable composite film and preparation method thereof
  • Degradable composite film and preparation method thereof
  • Degradable composite film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A degradable composite film, which is composed of the following raw materials in parts by weight: 35 parts of polylactic acid, 15 parts of polyvinyl alcohol, 18 parts of starch, 12 parts of corn straw powder, 8 parts of chitosan, 14 parts of lignocellulose, light 7 parts of 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 part of defoamer; wherein the starch is at least one of corn starch, potato flour and sweet potato flour kind.

[0024] A preparation method of a degradable composite film, comprising the following steps:

[0025] (1) take each raw material of corresponding weight part respectively;

[0026] (2) Add polylactic acid, polyvinyl alcohol, starch, corn stalk powder, chitosan, and lignocellulose into the mixer. The heating temperature is 80°C, the rotation speed is 50r / min, and the heating time is 20min; Calcium carbonate, diatomaceous earth, vermiculite powder, zinc o...

Embodiment 2

[0030] A degradable composite film, which is composed of the following raw materials in parts by weight: 45 parts of polylactic acid, 22 parts of polyvinyl alcohol, 25 parts of starch, 17 parts of corn straw powder, 13 parts of chitosan, 20 parts of lignocellulose, light 13 parts of calcium carbonate, 9 parts of diatomaceous earth, 12 parts of vermiculite powder, 8 parts of zinc oxide, 7 parts of epoxy 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 preparation method of a degradable composite film, comprising the following steps:

[0032] (1) take each raw material of corresponding weight part respectively;

[0033] (2) Add polylactic acid, polyvinyl alcohol, starch, corn stalk powder, chitosan, and lignocellulose into the mixer. The heating temperature is 90°C, the rotation speed is 60r / min, and the heating time is 30min; Calcium carbonate, diatomaceous earth, vermiculite powder, zinc...

Embodiment 3

[0037] A degradable composite film, which is 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 calcium carbonate, 6 parts of diatomite, 9 parts of vermiculite powder, 5 parts of zinc oxide, 4 parts of epoxy soybean oil, 1 part of defoamer; wherein the starch is at least one of corn starch, potato flour and sweet potato flour kind.

[0038] A preparation method of a degradable composite film, comprising the following steps:

[0039] (1) take each raw material of corresponding weight part respectively;

[0040] (2) Add polylactic acid, polyvinyl alcohol, starch, corn stalk 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; Calcium carbonate, diatomaceous earth, vermiculite powder, zinc oxide and e...

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Abstract

The invention relates to a degradable composite film and a preparation method thereof. The degradable composite film comprises, by weight, 35-45 parts of polylactic acid, 15-22 parts of polyvinyl alcohol, 18-25 parts of starch, 12-17 parts of corn stalk powder, 8-13 parts of chitosan, 14-20 parts of lignocelluloses, 7-13 parts of light calcium carbonate, 4-9 parts of diatomite, 7-12 parts of vermiculite powder, 3-8 parts of zinc oxide, 2-7 parts of epoxidized soybean oil and 0.5-3 parts of defoamers. The degradable composite film and the preparation method thereof have the advantages that the film is mainly prepared from the polylactic acid, and the starch, the corn stalk powder, the chitosan and the lignocelluloses are added compatibly, so that the film has high biological degradability and is safe and environment friendly, and white pollution is avoided; the zinc oxide, the diatomite and the vermiculite powder serve as activating agents, strength and tenacity of the film can be improved, and migration rate of plasticizers can be lowered; the raw materials are easy to get, the price is low, the preparation process is simple, and good economic benefit is achieved.

Description

technical field [0001] The invention relates to the technical field of composite films, in particular to a degradable composite film and a preparation method thereof. Background technique [0002] Composite films play an important role in daily life, and they can be used to prepare food packaging bags, shopping bags, mulch films, garbage bags, etc. However, with the increase in the use of plastic film products, a lot of pollution has been brought to the natural environment. Conventional plastic film products, such as plastic films made of polypropylene, polyvinyl chloride, polyethylene, etc., are polluted and naturally degraded in the natural environment. After being placed for many years, they still exist in the natural environment, and these non-degradable plastic films increase the pollution of the environment. At present, the ways to solve this environmental problem mainly include incineration, landfill and recycling. [0003] With the strengthening of people's awarene...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L29/04C08L3/02C08L97/02C08L5/08C08L91/00C08K13/02C08K3/26C08K3/34C08K3/22
CPCC08L67/04C08J5/18C08J2367/04C08J2403/02C08L2201/06C08L2203/16C08L2205/025C08L2205/035C08L2205/16C08L3/02C08L29/04C08L97/02C08L5/08C08L91/00C08K13/02C08K2003/265C08K3/34C08K3/346C08K2003/2296
Inventor 黄桂云许焱
Owner 安徽省天乐塑业有限公司
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