▎ 摘　　要

NOVELTY - Polyvinyl chloride supercritical foam composite material involves 80-88 pts. wt. polyvinly chloride, 7-10 pts. wt. maleic anhydride grafted polyethylene, 16-19 pts. wt. maleic anhydride grafted polyethylene modifier, 3-4 pts. wt. carboxylated double-walled carbon nanotubes, 2.5-3 pts. wt. graphene oxide, 5-8 pts. wt. nano silica, 2-3 pts. wt. dispersant, 1.5-2 pts. wt. crosslinking agent, 2-2.5 pts. wt. light stabilizer, and 3.5-4.5 pts. wt. antioxidants. USE - Polyvinyl chloride supercritical foam composite material. ADVANTAGE - The polyvinyl chloride supercritical foam composite material has good mechanical property, low compression permanent deformation rate, excellent resilience, high elasticity, high cell density, small cell size (diameter), uniform foam, and good foaming effect, and improves the tensile strength of the polyvinylchloride supercritical foaming composite material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a polyvinyl chloride supercritical foam composite material, which involves: (A) weighing each raw material separately; (B) mixing polyvinyl chloride, maleic anhydride grafted polyethylene, maleic anhydride grafted polyethylene modifier, carboxylated double-walled carbon nanotubes, graphene oxide, nano-silica, dispersing agent and resistance, oxygen agent, transferring to the internal mixer, and the internal temperature is 115-125 degrees C for 20-30 minutes, adding the crosslinking agent and light stabilizer at the temperature of 122-126 degrees C, mixing and blending components to obtain a blending blend; (C) using the tableting machine to compress the dense blend into a plate and cutting; (D) placing the board into an oven, preheat to 125-135 degrees C; and (E) placing the preheated foamed mother board into a high-temperature mold to pass carbon dioxide gas when the carbon dioxide gas reaches saturation in the sheet, releasing carbon dioxide gas in the mold is quickly to rapidly foam the sheet to obtain a polyvinyl chloride supercritical foam composite material, and the temperature of the high-temperature mold is 132-138 degrees C, and the pressure of the carbon dioxide gas in the mold is 14-16 megaPascal.