Patent ID: 6132847
Filing Date: 2000-10-17
Classification: C08J,Y10T

Abstract:
A foamed rubber extruded product which is formed of a vulcanizate of a rubber blend comprising a sulfur-vulcanziable ethylene-propylene-type rubber (EPDM) as a starting rubber and a pyrolytic foaming agent, the vulcanizate having a specific gravity of form 0.9 to 1.0 and a surface roughness (RZD) of 14 micrometers or less,wherein the rubber blend contains the pryolytic foaming agent in the form of an inorganic powder-supported foaming agent, a particle diameter of the inorganic powder in the inorganic powder-supported foaming agent is approximately 9 micrometers or less, a particle diameter of the pyrolytic foaming agent is approximately 8 micrometers or less, and crystalline polyethylene (crystalline PE) is further contained in an amount of from 6 to 30 parts by weight per 100 parts by weight of EPDM.