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A technology for biodegradation and biodegradation of polyester is applied in the field of preparation of biodegradable films, which can solve problems such as soil structure damage and land yield reduction, and achieve the effects of simple production process, improved efficiency and reduced processing steps.
Active Publication Date: 2013-03-13
张晓程
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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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Embodiment 1
[0045] 1. Prepare 40 kg of corn starch, 55 kg of polyvinyl alcohol, 6 kg of glycerin, polyglycidyl sebacate-D, 2 kg of L-malic acid, 1 kg of water, 1 kg of stearic acid, and poly 3-hydroxyl Butyrate 5 kg.
[0046] 2. Add corn starch, polyvinyl alcohol, compound plasticizer, lubricant, and biodegradable polyester to the high-speed mixer, and mix well;
[0047] 3. Put the above-mentioned uniformly mixed raw materials into a granulator for mixing, melting, extruding, cooling, and then pelletizing to obtain biodegradable resin pellets for making films;
[0048] 4. Add the biodegradable resin particles obtained in the above steps to a film blowing machine to make a film.
Embodiment 2
[0050] 1. Prepare 30 kilograms of corn starch, 45 kilograms of polyvinyl alcohol, 8 kilograms of glycerin, polyazelaic acid diglycidyl ester-, 5 kilograms of L-malic acid, 2 kilograms of water, 2 kilograms of calcium stearate, and poly 3-hydroxyl Butyrate 8 kg.
[0051] 2. Add starch, polyvinyl alcohol, compound plasticizer, lubricant, and biodegradable polyester into the high-speed mixer, and mix well;
[0052] 3. Put the above-mentioned uniformly mixed raw materials into a granulator for mixing, melting, extruding, cooling, and then pelletizing to obtain biodegradable resin pellets for making films;
[0053] 4. Add the biodegradable resin particles obtained in the above steps to a film blowing machine to make a film.
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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 for film products, in particular to a method for preparing biodegradable films. The film product obtained by this method is biodegradable and will not cause white pollution to the soil. Background technique: [0002] As we all know, white pollution is constantly destroying the environment on which we depend. The world is working hard to eliminate the harm caused by "white pollution" to people. Many fertile fields have reduced production, land desertification, river blockage, and flooding. The shortage of oil resources and rising oil prices have brought many factors of instability to human daily work and life, and seriously affected the environment of the entire society. [0003] For a long time, the agricultural film materials we have used (such as water retention film) are all disposable products made of petroleum synthetic resins, such as polyvinyl chloride, polypropylene, polyethylene and...
Claims
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Application Information
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