EXTRUDED PROPYLENE-RESIN COMPOSITE FOAM

摘要

An extruded propylene-resin composite foam (1) which is an extruded propylene-resin foam obtained by extrusion-foaming a molding material comprising a propylene resin. The propylene resin forming the extruded foam includes an olefin polymer having a loss tangent (tanH) as measured at a temperature of 298 K and a frequency of 10 Hz of 0.04-100. The molding material contains a fibrous filler in an amount of 0-60 mass%, excluding 0 mass%, based on the whole molding material. The foam is composed of a first extruded foam (2) having a percentage of closed cells of 40% or higher and an expansion ratio of 10 or higher and a second extruded foam (3) having a percentage of closed cells less than 40% and an expansion ratio of 10 or higher.