This invention discloses a composite polyolefin foaming material and its preparation method, belonging to the field of polymer composite materials technology. 50-65 parts of polystyrene resin, 30-40 parts of polystyrene recycled material, 2-10 parts of foaming agent, 0.5-3 parts of dispersant, 0.01-0.05 parts of initiator, 0.1-0.5 parts of antioxidant, and 3-8 parts of flame retardant are added to a mixer for mixing. Then, the mixture is extruded into sheets through a twin-screw extruder, calendered, pulled, cooled, and then entered into a foaming furnace for foaming. Finally, it is cooled to obtain the foaming material. Carbon nanotubes can increase the heterogeneous nucleation points of the cell structure, improve the cell structure, and thereby enhance the comprehensive performance of the foaming material; nitrogen (N) and phosphorus (P) work synergistically to improve the flame retardant properties of the material; long carbon chains can increase compatibility and provide a toughening effect; carbon-carbon double bonds can graft onto polyolefin molecular chains under the action of an initiator, ensuring that the flame retardant is not easily migrated and shed, thereby imparting the foaming material with stable and durable flame retardant properties.
Country Code: CN
Application Number: CN202311515072.5
