Patent ID: 8889750
Filing Date: 2014-11-18
Classification: C08F,C08J,C08L,Y10S

Abstract:
1. Polypropylene resin expanded particles comprising: a polypropylene resin as a base material resin, the polypropylene resin having at least three melting peaks on a DSC curve for a second temperature rise measured at a heating rate of 10° C./min with use of a heat flux differential scanning calorimeter (DSC), the at least three melting peaks including (i) a lowest temperature melting peak of not lower than 100° C. and not higher than 130° C. and (ii) a highest temperature melting peak of not lower than 140° C. and not higher than 160° C., the polypropylene resin having a resin DSC ratio change rate of 0.5%/° C. to 3.0%/° C., the expanded particles having two melting peaks in a DSC measurement made at a first temperature rise at the heating rate of 10° C/min, the two melting peaks including, (i) on a lower temperature side, a melting peak temperature of not lower than 100° C. and not higher than 130° C. and, (ii) on a higher temperature side, a melting peak temperature of not lower than 140° C. and not higher than 160° C.