▎ 摘　　要

NOVELTY - A flame retardant polypropylene/graphene/carbon nanotube composite material comprises intumescent flame retardant, graphene, and carbon nanotubes. USE - Flame retardant polypropylene/graphene/carbon nanotube composite material. ADVANTAGE - The composite material improves flame retardant effect of the polymer material, and reduces use of flame retardants in polymers and flame retardant costs. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of composite material comprising mixing graphene, carbon nanotubes and polypropylene to obtain graphene and carbon nanotube polypropylene masterbatch; and extruding graphene and carbon nanotube polypropylene masterbatch and intumescent flame retardant.