▎ 摘　　要

NOVELTY - Preparation method of foamed polyvinyl chloride (PVC) composite material comprises adding dispersant, surfactant and sodium chloride to water, and stirring well to prepare a water phase dispersion system, (S2) adding a crosslinking agent, an initiator, and a low boiling point foaming agent to double-bond organic compound, and stirring evenly to prepare an oil phase mixture, (S3) adding the oil phase mixture to the water phase dispersion system to form an emulsion, performing a suspension polymerization at 50-60℃ for 20-24 hours to form a suspension, washing and drying to obtain a solid foaming agent, and (S4) mixing PVC resin, solid foaming agent, hydrotalcite, hollow glass microspheres, vulcanizing agent and plasticizer evenly, and melting and extruding through an extruder. USE - The method is used for preparing foamed PVC composite material, which is used in building materials, and advertising industries. ADVANTAGE - The method uses hollow glass microspheres, which helps ball bearings, improves the fluidity of materials, and facilitates processing and molding, the basic oxide contained in the hollow glass microspheres can react with the hydrogen chloride released by the decomposition of PVC at high temperature, and simultaneously improves the thermal stability of the PVC material. The hollow glass microsphere improves the mechanical properties of the material without affecting the foaming density.