▎ 摘　　要

NOVELTY - Preparing graphene multilayer co-extruded plastic film comprises e.g. manufacturing the base layer, manufacturing inner lining layer, manufacturing outer lining, preparing surface layer, conveying the obtained mixture to the blow molding die respectively through an extruder, and using blow molding technology producing graphite multi-layer co-extrusion film. USE - The method is useful for preparing graphene multilayer co-extruded plastic film. ADVANTAGE - The method: improves the disadvantages of the current technology, and performance of the multilayer plastic film. DETAILED DESCRIPTION - Preparing graphene multilayer co-extruded plastic film comprises (1) providing 100-120 pts. wt. butyl acetate, 55-60 pts. wt. paraffin, 30-40 pts. wt. phthalate, 70-100 pts. wt. methyl orthosilicate, 15-20 pts. wt. dimethyl maleate, 730-800 pts. wt. polymethyl methacrylate and 1000-1500 pts. wt. ethylene-vinyl acetate copolymer, adding into the extruder to extrude, extruding under 3.5-4 bar extrusion pressure and 2-2.2 kg/hour extruding speed, (2) mixing 100-120 pts. wt. ethylene glycol, 30-40 pts. wt. polyetherimide, 50-80 pts. wt. aramid fiber, 200-300 pts. wt. melamine formaldehyde resin, 500-600 pts. wt. polymethyl methacrylate, 800-1200 pts. wt. ethylene-vinyl acetate copolymer and 15-20 pts. wt. graphite powder, adding into extruder to extrude under 2.5-3 bar extrusion pressure and 3-3.5 kg/hour extruding speed, where the granularity of graphite powder is 10-50 mu m, (3) mixing 150-180 pts. wt. ethylene glycol, 300-400 pts. wt. polyhydroxybutyrate, 10-20 pts. wt. stearic acid, 100-150 pts. wt. polytrifluorochloroethylene, 120-140 pts. wt. 3-phenyl-2-propenoic acid-2-propenyl ester, 1200-1500 pts. wt. ethylene-vinyl acetate copolymer and 50-100 pts. wt. graphite powder, adding into extruder to extrude under 3-3.5 bar extrusion pressure and 3-3.5 kg/hour extruding speed, where the granularity of graphite powder is 10-50 mu m, (4) mixing 200-220 pts. wt. polyoxymethylene, 100-130 pts. wt. 3-methyl-2-butenal, 100-150 pts. wt. butadiene, 70-100 pts. wt. ethyl 3-bromopropionate, 50-60 pts. wt. N,N-diisopropylaniline, 110-160 pts. wt. tert-butyl iso-sulfate, 700-800 pts. wt. ethylene-vinyl acetate copolymer and 500-700 pts. wt. polyethylene into extruder, extruding under 3-3.2 bar extruding pressure and 3-3.5 kg/hour extruding speed, and (5) conveying the mixture manufactured in steps (1)-(4) to the blow molding die respectively through an extruder, and using blow molding technology producing graphite multi-layer co-extrusion film. An INDEPENDENT CLAIM is also included for graphene multilayer co-extruded plastic film, prepared by above method.