Particulate polyolefin expansion molding material

摘要

A particulate polyolefin expansion molding material is disclosed. The material is comprised of a particulate polyolefin having a bulk density of 0.45 g/cc or more and a mean particle size of 150 to 2,000 mu , having provided on the surface thereof at least one layer comprising an expanding agent, a binder and a filler. The material can be used in producing expansion molded articles without first forming the material into pellets as is conventionally done.