▎ 摘　　要

NOVELTY - Coating car floor with powder involves preparing raw materials by taking 22-26 wt.% phenolic epoxy resin, 17-22 wt.% carboxyl polyester resin, 19-25 wt.% epoxy acrylate, 1-5 wt.% pigment, 8-12 wt.% cast stone powder, 1-5 wt.% graphene oxide and processing additives. The raw materials are uniformly mixed. The mixture is melt-extruded through a twin-screw extruder, finally crushed and ground into a powder paint. The car floor after roughening is placed at a temperature of 80-95 degrees C, followed by jet degreasing, cleaning and hot water rinsing, where each cleaning time is 18-25 minutes. USE - Method for coating car floor with powder (claimed). ADVANTAGE - The method enables to coat car floor with powder in simple operation, mild curing conditions and short curing time, and the obtained coating film has good anticorrosive, anti-rust, anti-collision, noise prevention, abrasion and impact resistance, high strength, good dispersion, high adhesion, effectively extends the life of the car floor and is worth promoting. DETAILED DESCRIPTION - Coating car floor with powder involves preparing raw materials by taking 22-26 wt.% phenolic epoxy resin, 17-22 wt.% carboxyl polyester resin, 19-25 wt.% epoxy acrylate, 1-5 wt.% pigment, 8-12 wt.% cast stone powder, 1-5 wt.% graphene oxide and processing additives. The raw materials are uniformly mixed. The mixture is melt-extruded through a twin-screw extruder, finally crushed and ground into a powder paint. The car floor after roughening is placed at a temperature of 80-95 degrees C, followed by jet degreasing, cleaning and hot water rinsing, where each cleaning time is 18-25 minutes. After the cleaning is finished, it is placed in the temperature of 108-123 degrees C and dried for 8-15 minutes to obtain the pretreated automobile floor. The powder coating material is loaded into a powder feeder, and the pretreated automobile bottom plate is preheated to 248 to 278 degrees C, and then placed in an electric field environment. The electrostatic spray gun is used on the surface of the car for preheat paint powder coating operation to have a uniform thickness of the coating. The car floor finished after painting is placed under the environment of 178 to 205 degrees C, and cured for 15 to 28 minutes and after cooling, the quality inspection is carried out, and the package is qualified after passing.