Patent ID: 11942666
Assignee: NISSHINBO CHEMICAL INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC D  H  Y | IPC H

Claim 0:
1. A precursor sheet for fuel cell separator comprising:
an electroconductive substrate sheet, a dense layer containing first graphite particles, and an electroconductive layer containing second graphite particles,
wherein the dense layer and the electroconductive layer contain a resin,
the first graphite particles have a bulk density of 1.7 g/cm3 or more and a volume resistivity of 20 mΩ·cm or more when compressed at 30 MPa, and
the second graphite particles have a bulk density of 1.5 g/cm3 or more and a volume resistivity of less than 20 mΩ·cm when compressed at 30 MPa.