Polyolefin-based resin pre-expanded particles and polyolefin-based resin in-mold expansion molded article comprising polyolefin-based resin pre- expanded particles

摘要

Polyolefin-based resin pre-expanded particles include a polyolefin-based resin composition including a polyolefin-based resin, a sterically hindered amine ether flame retardant expressed by the general formula (1): R¹NHCH₂CH₂CH₂NR²CH₂CH₂NR³CH₂CH₂CH₂NHR⁴ (1), and a phosphoric ester. The polyolefin-based resin pre-expanded particles are flame retardant polyolefin-based resin pre-expanded particles that can have good in-mold expansion moldability and exhibit excellent flame resistance compared to the conventional pre-expanded particles even when molded into a sample having a higher density or a larger thickness without using a halogen flame retardant, and that do not generate harmful gas during burning.