Patent ID: 7803862
Filing Date: 2010-09-28
Classification: C08J

Abstract:
1. A polyolefin resin foam obtained by subjecting a composition for polyolefin resin foam to foam molding using carbon dioxide in a supercritical state, wherein the composition comprises: a polymer component comprising 100 parts by weight of at least one of polyethylene and polypropylene and 10 to 150 parts by weight an elastomer having a micro-domain structure made up of an olefin ingredient and an ethylene/propylene rubber, and a powder particle having a particle diameter of from 0.1 to 10 μm, wherein the powder particle is contained in an amount of from 5 to 150 parts by weight based on 100 parts by weight of the polymer component, wherein the composition has an extensional viscosity as measured with a capillary rheometer (temperature, 200° C.; shear rate, 5,000 [1/s]) of from 20 to 100 kPa·s, wherein the polyolefin resin foam has a relative density in the range of from 0.02 to 0.30, wherein the polyolefin resin foam has a load against repulsion upon compressing to 50% (50% compression strength) of 5.0 N/cm wherein the final thickness of the obtained foam is from 0.5 to 5.0 mm.