Patent ID: 9040599
Filing Date: 2015-05-26
Classification: B29C,C08F,C08J

Abstract:
1. Polypropylene resin expanded particles, comprising: a polypropylene resin as a base material resin which has at least three melting peaks on a DSC curve obtained by measurements of melting points with use of a differential scanning calorimeter, the DSC curve being obtained in a second temperature rise in raising a temperature of the polypropylene resin from 20° C. to 220° C. at a heating rate of 10° C./min, lowering the temperature from 220° C. to 20° C. at a cooling rate of 10° C./min, and raising the temperature again from 20° C. to 220° C. at a heating rate of 10° C./min, the at least three melting peaks including (i) a lowest-temperature melting peak of 100° C. or more but 130° C. or less and (ii) a highest-temperature melting peak of 140° C. or more but 160° C. or less.