Foaming PVC (polyvinyl chloride) composite material with electromagnetic shielding performance as well as preparation method and application of foaming PVC composite material

The invention discloses a foamed PVC (polyvinyl chloride) composite material with electromagnetic shielding performance as well as a preparation method and application thereof. The foamed PVC composite material with the electromagnetic shielding performance is prepared from the following components in parts by weight: 100 parts of PVC, 35 to 50 parts of plasticizer, 6 to 12 parts of heat stabilizer, 1 to 3 parts of light stabilizer, 6 to 15 parts of hydrotalcite, 1 to 10 parts of phosphate flame retardant CDP, 0.5 to 2 parts of lubricant, 0.5 to 2 parts of modified carbon nanotube, 10 to 20 parts of light calcium carbonate, 1 to 20 parts of silicon carbide, 1 to 10 parts of zirconium oxide, 1 to 10 parts of magnetic nickel powder and supercritical carbon dioxide. Inorganic materials such as silicon carbide, zirconium oxide, carbon nanotubes and magnetic nickel powder are combined with foamed polyvinyl chloride to form the composite material, and the formed foamed PVC composite material has the characteristics