Biodegradable plastics are a kind of plastics which are degraded by the action of microorganisms such as bacteria, fungi and algae. The ideal biodegradable plastic is a kind of polymer material with excellent performance, which can be completely decomposed by environmental microorganisms after being discarded, and finally be inorganic to become a part of carbon cycle in nature. "
Paper is a typical biodegradable material, while synthetic plastic is a typical polymer material. Therefore, biodegradable plastic is a kind of polymer material with the properties of "paper" and "synthetic plastic". Biodegradable plastics can be divided into complete biodegradable plastics and destructive biodegradable plastics.
Destructive biodegradable plastics: at present, destructive biodegradable plastics mainly include starch modified (or filled) PE, PP, PVC, PS, etc.
Fully biodegradable plastics: fully biodegradable plastics are mainly made from natural polymers (such as starch, cellulose, chitin) or agricultural and sideline products through microbial fermentation or synthesis of biodegradable polymers, such as thermoplastic starch plastics, aliphatic polyester, polylactic acid, starch / polyvinyl alcohol, etc.