Ammonium polyphosphate/graphene synergistic flame retardant EVA (ethylene-vinyl acetate copolymer) foaming material and preparation method thereof

The invention belongs to the field of flame retardant foaming EVA (ethylene-vinyl acetate copolymer) materials, and particularly relates to an ammonium polyphosphate/graphene synergistic flame retardant EVA foaming material and a preparation method thereof. The flame retardant material comprises EVA resin, maleic anhydride-g-EVA, modified ammonium polyphosphate, functional graphene, a foaming agent, a foaming agent accelerator, a lubricating agent, a plasticizer and a peroxidation cross-linking agent. The ammonium polyphosphate/graphene synergistic flame retardant EVA foaming material, which is taken as the foaming material, not only has excellent mechanical properties, but also has the advantages of being less in additive amount of a flame retardant, having no halogen, being clean, being low in smoke and toxicity and being stable in flame retardant effect, and the UL grade reaches V-0. The preparation method is simple, is low in cost and convenient in operation and is beneficial for realizing industrial prod