POLYPROPYLENE RESIN FOAMED BEADS AND FOAM MOLDINGS
摘要
<p>Foam moldings obtained by packing polypropylene resin foamed beads into a mold and molding the beads by heating with steam, which exhibit little deformation even when the aging time for recovering the shrinkage and deformation after molding is short and which has a small shrinkage factor based on mold dimension and excellent dimensional stability and surface appearance; and polypropylene resin foamed beads which are obtained by expanding a polypropylene resin having a melting point of 125 to 160°C and have a true expansion ratio of 20 to 35, characterized by exhibiting a melt viscosity of 7500 to 12000 poises and a melt tension of 0.5 to 1.8g at 170°C and having cell diameters of 200 to 1000µm.</p>
