Posted by J dsgg
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Biodegradable plastic is a plastic material that can be degraded in nature. In a natural burial or composting environment where there is sufficient humidity, oxygen and appropriate microorganisms, it can be metabolized and decomposed by microorganisms to produce water and carbon dioxide or methane, compostable spoonswhich is less harmful to the environment.
There are basic biodegradable plastic bioplastics that are extracted from renewable raw materials, and petrochemical plastics that contain biodegradable additives that can promote biodegradation.
Basically, bioplastics is not a new concept. Celluloid, made of camphor and nitrocellulose, was invented as a substitute for ivory billiards as early as the 1850s. But like other early recyclable plastics, celluloid lacks the plasticity and development of synthetic plastics, and is now mainly used for neckline linings and billiards.
Features
The main materials of biodegradable plastics are starch, polylactic acid and fibrous protein. Its contents do not contain traditional plastic components, and it is still the same as traditional plastics in terms of molding methods and general use. Biodegradable plastic can be decomposed into carbon dioxide and water by the action of aerobic microorganisms, water and oxygen in the soil in a multi-oxygen environment, and decomposed into carbon dioxide and methane by the action of anaerobic microorganisms and H2O in a low-oxygen environment.
polylactic acid is the raw material of lactic acid, which is fermented from starch. Because it comes from plants, petrochemical resources are much reduced. Although it can be decomposed, it takes about 25 months to hydrolyze at room temperature, and it takes 11.4 months to start the decomposition. This is a disadvantage, so if you are making compost at high temperature (60℃-70℃) and high moisture content (50- 60%) can be decomposed very fast, about 50 days.
usefulness
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Among biodegradable plastics, polylactic acid is most commonly used.
packaging products are mainly used for small packaging masks such as packaging boxes, egg boxes, fresh trays and batteries. The use of polylactic acid small packaging masks can recycle the entire package as paper. There are also conveyor belts and disc-shaped packaging boxes for LSI. Small packaging bags such as pillow packaging are widely used for packaging CDs or mobile phone operating instructions. Food packaging materials and tableware need to use biodegradable plastics.
The logistics has a waterproof membrane and a barcode.
The fabrics are used for waterproof canvas and clothing, foreskins for fireworks, and fluff mats for automobiles.
plastic emulsion can be molded into various shapes of products.
Drugs are usually used for surgical sutures, which are self-absorption mechanisms.
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