▎ 摘　　要

NOVELTY - A thermal forming environment-friendly vacuum plastic film comprises 100 parts mass ethylene-based polyvinyl chloride resin powder with a polymerization degree of 800, 10-20 parts mass rutile titanium dioxide, 3-5 parts mass barium-zinc stabilizer, 2-4 parts mass graphene oxide, 0.5-2 parts mass antioxidant, 1-2 parts mass pigment and 3-5 parts mass lubricant. USE - The thermal forming environment-friendly vacuum plastic film is used for preparing plastic door panel. ADVANTAGE - The thermal forming environment-friendly vacuum plastic film uses ethylene-based polyvinyl chloride resin powder with a polymerization degree of 800, which has good temperature resistance and suitable processing performance, without adding any plasticizer and soybean oil, and the film produced by calendering has small deformation and low shrinkage rate. The produced plastic film has good plasticization, good flatness, and low shrinkage rate below 1%, which is convenient for subsequent lamination and embossing. The post-lamination embossing uses a three-layer high-temperature laminating machine, which can distinguish the raw material structure more carefully, and controls the temperature more precisely, when laminating, the stretching of the film is smaller, below 2%, the shrinkage rate of the produced plastic film is lower, and the deformation is very slight during vacuum blistering. The thermal forming environment-friendly vacuum plastic film improves the production efficiency, and enhances the stability and reliability of the plastic door panel. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of the thermal forming environment-friendly vacuum plastic film comprising (S1) putting ethylene-based polyvinyl chloride resin powder with a polymerization degree of 800, barium-zinc stabilizer, rutile titanium dioxide, pigment, antioxidant, graphene oxide and lubricant in temperature 1 (T1) using a high-speed mixer, mixing, and preserving heat for 3- 5 minutes, (S2) raising the temperature of the high-mixer to T2, continue mixing, and preserving heat for 10-12 minutes, (S3) cooling down the high mixer to T3 and keeping it warm for 2-4 minutes, (S4) mixing and plasticizing the material obtained in step (S3) using an internal mixer, (S5) filtering impurities through a filter, (S6) rolling by six rollers, cooling, shaping and winding to obtain a single-layer calendered film, (S7) passing a three-layer calendered film through the three-layer laminating machine, passing through the three-layer preheating wheel temperature of the surface, middle and bottom layers at 80-120℃, and pressing the rubber roller at the temperature of the main heating wheel at 175-185℃, and (S8) compounding the three-layer calendered film thermally into one, and the water temperature is 40-80℃ through the embossing wheel, carrying out the embossing treatment to produce a concave-convex texture on the surface, cooling, shaping, and winding to obtain the finished product.