PRODUCTION OF EXTRUDED AND FOAMED BODY OF POLYOLEFIN- BASED RESIN, THE EXTRUDED AND FOAMED BODY, AND THERMOFORMING OF THE EXTRUDED AND FOAMED BODY

摘要

PROBLEM TO BE SOLVED: To provide a method for producing an extruded and foamed body of a polyolefin-based resin by which the extruded and foamed body excellent in extruding and foaming properties and having improved brittleness is produced, and further, to obtain the extruded and foamed body thereby. SOLUTION: A mixed resin comprising (A) 95-50 wt.% polypropylene-based resin having the relation satisfying the equation ln(MT)>-0.83)ln(MFR)+2.82 [ln(MT) is a natural logarithm of a melt tension MT (gf); ln(MFR) is a natural logarithm of a melt flow rate MFR (g/10 min)], and (B) 50-5 wt.% polyolefin- based resin not having the relation represented by the equation and having a melting point 3-30 deg.C lower than that of the polypropylene-based resin A, is extruded with a foaming agent from an extruder to foam the mixed resin.