Pre-expanded polypropylene resin particles, and mold foamed articles

An object of the present invention, using a molding machine 0.4MPa withstand voltage specifications often used currently, surface appearance properties is high and is to provide a mold expansion molded article having a high rigidity. The present invention, MFR is 5 g / 10 min or more 20 g / 10 min or less, melting point of 140 ° C. or higher 155 ° C. or less, and pre-expanded polypropylene resin particles and the pre of the resin satisfies the following conditional expression as a base resin a mold expansion molded article obtained by molding the expanded beads. [Heat of crystal fusion (J / g)] ≧ 1.2 × [mp (℃)] - 96