Bio-based biodegradable plastic materials

The present invention relates to a bio-based biodegradable plastic materials, belongs to the technical field of polymer materials. The bio-based bio-degradable plastic material of the present invention is made from the following components in mass percentages: 5-25% of polylactic acid, 43-48% polyethylene terephthalate - co - butylene succinate, 15-30% poly 3-hydroxybutyrate, 4-hydroxybutyrate, tapioca starch 0-30%, 1-2% bio-based coupling agents, reactive compatibilizer 0.5-2%, 0.5-1% biobased cool slip agent. The present invention has been selected three of biodegradable plastics industry, and it can reach all three materials partially or fully bio-based bio-based, PLA rigid material, flexible material PBST, P3HB-4HB hardness, strength, toughness center; based on this non-food crops can be reintroduced into tapioca starch, either to reduce costs, but also the thermoplastic starch becomes amorphous structure, help to improve the tear strength of the film.