▎ 摘　　要

NOVELTY - A polylactic acid-polyamide biopolymer alloy material comprises 80-85 pts. wt. polylactic acid, 15-20 pts. wt. polyamide, 1-2 pts. wt. styrene-acrylonitrile-maleic anhydride copolymer, 1-2 pts. wt. polyethylene-glycidyl (meth)acrylate, 1 pt. wt. talc powder, 1-2 pts. wt. aluminum hydroxide, 0.5 pt. wt. dicyclohexylcarbodiimide, 0.5-1.0 pt. wt. graphene and 0.4-0.8 pt. wt. antioxidant. USE - Polylactic acid-polyamide biopolymer alloy material (claimed). ADVANTAGE - The environmentally-friendly polylactic acid-polyamide biopolymer alloy material has high impact strength, improved heat resistance, excellent mechanical properties and excellent flame retardance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of polylactic acid-polyamide biopolymer alloy material, which involves (1) adding talc powder and graphene, modifying with silane coupling agent to obtain modified powder, (2) adding polylactic acid, drying, adding styrene-acrylonitrile-maleic anhydride copolymer, polyethylene-glycidyl (meth)acrylate, aluminum hydroxide, dicyclohexylcarbodiimide, antioxidant and modified powder, mixing evenly, adding obtained mixture to twin-screw extruder, melt blending and extruding, cooling, drying and blending to obtain pellets, (3) injection molding at 210 degrees C, 220 degrees C, 230 degrees C and 225 degrees C. The twin-screw extruder is heated at 190 degrees C, 200 degrees C, 220 degrees C, 225 degrees C and 230 degrees C and maintained at head temperature of 225 degrees C.