| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polypropylene-based resin foaming particle producible of an in-mold foam-molded product with extremely low steam pressure for heat molding, and little in reduction of physical properties such as compression strength of the in-mold foam-molded product obtained. <P>SOLUTION: This polypropylene-based resin foaming particle is based on a polypropylene-based resin satisfying all of (a) to (d) below, as the base resin. It is a polypropylene-based resin (a) polymerized by a metallocene-based polymerization catalyst; (b) having at least two melting peaks in a DSC curve obtained by melting point measurement according to the differential scanning colorimetry, having the lowest melting peak within 100-135°C range, and having the highest melting peak within 140-160°C range; (c) treated with an organic peroxide; and (d) having a melt flow rate within 5-30 g/10 min range. <P>COPYRIGHT: (C)2012,JPO&INPIT |
