| 摘要 |
Polypropylene resin expanded particles include: a polypropylene resin as a base material resin having at least two melting peaks on a DSC curve obtained by measurements of melting points using a DSC, the at least two 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, so that the expanded particles: can produce an in-mold foaming molded product at a very low mold heating steam pressure; exhibit low distortion, low shrinkage, and a wide range of heating condition for molding, even if the mold heating steam pressure is increased; indicate a satisfactory moldability when the expanded particles are molded by using a mold having a complicated shape or a large mold; and maintain its properties such as compressive strength, without being impaired largely, when the expanded particles prepare the in-mold foaming molded product. |
