the present invention is directed to a process for manufacturing biodegradable plastic from high percentage recyclable plastic feedstock and the product thereof . the process comprises receiving recyclable plastic feedstock including high density polyethylene , low density polyethylene , expanded polyethylene , and stretched wrap , separating the plastic feedstock by plastics of like type , grinding the separated plastics into particulate while maintaining the temperature below said separated plastic &# 39 ; s decomposition and melting point . the plastics are mixed in proportion , adding a biodegradable additive to the particulated plastic mixture with further mixing to produce the biodegradable plastic . optionally , the resulting plastic is extruded for later use .