▎ 摘　　要

NOVELTY - Wave-absorbing foam comprises 50 vol.% polystyrene resin, 2.5-10 vol.% graphene and 40-47.5 vol.% liquid foaming agent. USE - Used as wave-absorbing foam. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for producing wave-absorbing foam, comprising melting by introducing polystyrene resin into an extruder, injecting a mixture of liquid foaming agent and graphene into an extruder, evenly mixing by rotating the extrusion screw, extrusion molding, and vacuum vaporizing to expand and expand the extrudate.