Patent ID: 11904579
Assignee: JSP CORPORATION
Field: Other special machines (Mechanical engineering)
Classification: CPC B  C | IPC B

Claim 0:
1. A polypropylene-based resin expanded bead comprising:
a core layer, in a foamed state, comprising a polypropylene-based resin; and
a covering layer, which covers the core layer, comprising a polyethylene-based resin,
wherein
a bulk ratio is 55 times to 90 times,
a mass ratio between the core layer and the covering layer is 95:5 to 88:12,
a flexural modulus Mc of the polypropylene-based resin contained in the core layer is 800 MPa to 1200 MPa, and
a flexural modulus Ms of the polyethylene-based resin contained in the covering layer is 250 MPa or less.