SEAT CORE MATERIAL, SEAT PORTION, AND SEAT

摘要

Provided is a seat core material which suppresses the occurrence of a rubbing sound due to the sliding of the contact surfaces of a cushion layer and the seat core material. In the seat core material of a seat portion (3) which is equipped with the seat core material (4) comprising a hard synthetic resin foam, and a cushion layer (5) comprising a soft synthetic resin foam covering the seat core material, a plurality of protrusions (10) extending in the rising direction (9) of the seat core material are provided to a rising portion (7) of the seat core material, the rising portion (7) making contact with the cushion layer and facing the calves of a human body.