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Method for preparing biodegradable membrane

A technology for biodegradation and biodegradation of polyester is applied in the field of preparation of biodegradable films, which can solve problems such as land yield reduction and soil structure damage, and achieve the effects of complete degradation, simple production process and excellent performance.

Active Publication Date: 2011-01-19
张晓程
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These abandoned water-retaining films also caused great damage to the soil structure of the land, which directly led to a series of adverse consequences such as land production reduction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 1. Prepare 40 kg of cornstarch, 55 kg of polyvinyl alcohol, 6 kg of glycerin, poly diglycidyl sebacate-D, 2 kg of L-malic acid, 1 kg of water, 1 kg of stearic acid, poly-3-hydroxy Butyrate 5 kg.

[0046] 2. Add cornstarch, polyvinyl alcohol, compound plasticizer, lubricant, and biodegradable polyester into the high-speed mixer, and stir evenly;

[0047] 3. Put the uniformly mixed raw materials into a granulator for kneading, melting, extruding, cooling, and then pelletizing to obtain biodegradable resin granules for making films;

[0048] 4. Add the biodegradable resin particles obtained in the above steps into a film blowing machine to make a film.

Embodiment 2

[0050] 1. Prepare 30 kg of cornstarch, 45 kg of polyvinyl alcohol, 8 kg of glycerin, poly(diglycidyl azelate), 5 kg of L-malic acid, 2 kg of water, 2 kg of calcium stearate, poly-3-hydroxy Butyrate 8 kg.

[0051] 2. Add starch, polyvinyl alcohol, compound plasticizer, lubricant, and biodegradable polyester into the high-speed mixer, and stir evenly;

[0052] 3. Put the uniformly mixed raw materials into a granulator for kneading, melting, extruding, cooling, and then pelletizing to obtain biodegradable resin granules for making films;

[0053] 4. Add the biodegradable resin particles obtained in the above steps into a film blowing machine to make a film.

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PUM

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Abstract

The invention relates to the technical field of agricultural membrane product production methods, in particular to a method for producing a biodegradable membrane preventing from damaging a soil structure. The biodegradable membrane is prepared from starch, polyving akohol, a plasticizer, a lubricating agent and biodegradable polyester serving as raw materials. The method comprises the following steps of: mixing the raw materials according to a ratio; granulating by using a twin-screw extruder; and finally, blowing to form the membrane by using a film blowing machine. The method has the advantages of simple production process, less procedures and high efficiency; and packing materials prepared by the product of the invention are completely degraded into carbon dioxide and water in three months to one year when discarded in nature, and the degradation speed is high, so the biodegradable membrane is an ideal material for replacing the conventional common plastic film and treating white pollution.

Description

Technical field: [0001] The invention relates to the technical field of production methods of film products, in particular to a preparation method of biodegradable films. The film product obtained by the method is biodegradable and does not cause white pollution to soil. Background technique: [0002] As we all know, white pollution is constantly destroying the environment on which we live. The whole world is trying to find ways to eliminate the harm caused by "white pollution". The shortage of oil resources and rising oil prices have brought many unstable factors to human daily work and life, and seriously affected the environment of the entire society. [0003] For a long time, the agricultural film materials (such as water-retaining film) we have used are disposable products made of petroleum synthetic resins, such as polyvinyl chloride, polypropylene, polyethylene, etc., and are discarded as garbage after use. , some are discarded everywhere, and some are buried or bur...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L3/02C08L67/04C08L67/02C08K5/053C08K3/34C08K5/20C08K5/103C08K5/09C08K5/098B29C55/28
Inventor 祝光富王平彭贤宾吕光春孙立波
Owner 张晓程
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