PRODUCTION OF POLYETHYLENE-BASED OPEN-CELL FOAM

摘要

PROBLEM TO BE SOLVED: To improve the heat resistance and rubber elasticity of a polyethylene- based open-cell foam, by using a polyethylene-based open-cell foam together with a styrene-butadiene-based thermoplastic elastomer and an ethylene- propylene-based polymer. SOLUTION: A mixture obtained by adding 5-30 pts.wt. of an ethylene- propylene-based polymer to 100 pts.wt. of a base resin comprising 80-95 pts.wt. of a polyethylene-based resin and 20-5 pts.wt. of a styrene-butadiene-based thermoplastic elastomer is compounded with a blowing agent and a crosslinking agent to give a foamable cross-linkable, which is expanded in not airtight molds to form a foam. Then the foam is mechanically deformed to make cells open.