▎ 摘　　要

NOVELTY - Preparing a biaxially oriented polypropylene antistatic stretch film involves obtaining intermediate layer raw material by blending and extruding polypropylene with a mass fraction of 70-80 wt.% and 20 wt.% to 30 wt.% of polyetheretherketone at 180-250 degrees C through a twin-screw extruder. The polypropylene with a ratio of 1:0.003 is blended with graphene, and the twin-screw extruder is extruded to obtain the inner surface raw material. A graphene oxide suspension having a concentration of 1.5 mg/ml is selected for vacuum filtration to obtain a graphene oxide film. A mass ratio of 1:20 SiC nanoparticles mixed with a polyamic acid solution is used to obtain a mixed solution, placing a graphene oxide film in a mass ratio of 1:2 in the mixed solution, and immersing the reaction at a temperature of 30-35 degrees C for 2-3 h. After immersing the reaction, it is heated in a drying oven at 100-150 degrees C for 1.5 h, and then extruded through a twin-screw extruder to obtain an outer surface raw material. USE - Method for preparing a biaxially oriented polypropylene antistatic stretch film. ADVANTAGE - The method enables to prepare a biaxially oriented polypropylene antistatic stretch film, which has good performance, effectively improves the adhesion of the ink and the adhesive, and no surface treatment is required before printing and compounding. DETAILED DESCRIPTION - The 4 wt.% cellulose acetate butyrate, 9 wt.% rosin, 2 wt.% adhesion promoter, 2-2.5 wt.% plasticizer, 40 wt.% butyl ester, 5 wt.% n-butanol, and ethyl ester are weighed. A portion of the weighed rosin and butyl ester are mixed until the complete rosin is dissolved to obtain a rosin solution having a concentration of 30 wt.%. The weighed cellulose acetate butyrate and the remaining butyl ester are mixed until the cellulose acetate butyrate is completely dissolved to obtain a cellulose acetate butyrate solution having a concentration of 15 wt.%. The adhesion promoter, the rosin solution and the cellulose acetate butyrate solution are mixed, and mixing the remaining components until completely dissolved. The intermediate layer raw material is dried and sent to the main extruder for heating to a molten state. The inner surface raw material is heated and melted in an auxiliary extruder. The outer surface material is heated and melted in another auxiliary extruder, and then the melt is merged and extruded in a three-layer structure die. The steel piece is attached to a chill roll by 10 to 20 degrees C to form a cast piece, and then the cast piece is biaxially stretched to obtain a biaxially oriented polypropylene film. The sprayed material prepared in the fourth step is heated to 80-100 degrees C and uniformly sprayed on the biaxially oriented polypropylene film, and naturally cooled to obtain a finished product.