Fuel cell separator and production process thereof
AssigneeShowa Denko K.K.
InventorsTadashi Iino, Zenichiro Izumi
Life of this patent
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Abstract
A fuel cell separator having a surface layer on one side or both sides thereof. The surface layer includes at least two layers, wherein the surface layer includes a low-elastic modulus layer (1) having a bending elastic modulus of 1.0×10<sp>1</sp>-6.0×10<sp>3</sp> MPa, and a bending strain of 1% or more; and a high-elastic modulus layer (2) having a bending elastic modulus exceeding 6.0×10<sp>3</sp> MPa, as at least one layer constituting the surface layer, other than the low-elastic modulus layer (1).
Claims18
A fuel cell separator having a surface layer on one side or both sides thereof, the surface layer comprising at least two layers, wherein the surface layer comprises a low-elastic modulus layer (A) having a bending elastic modulus of 1.0×101-6.0×103 MPa, and a bending strain of 1% or more;
- and a high-elastic modulus layer (B) having a bending elastic modulus exceeding 6.0×103 MPa, as at least one layer constituting the surface layer, other than the low-elastic modulus layer (A).
A process for producing a fuel cell separator having a surface layer on one side or both sides thereof, the surface layer comprising at least two layers, wherein the surface layer comprises a low-elastic modulus layer (A) having a bending elastic modulus of 1.0×101×6.0×103 MPa, and a bending strain of 1% or more;
- and a high-elastic modulus layer (B) having a bending elastic modulus exceeding 6.0×103 MPa, as at least one layer constituting the surface layer, other than the low-elastic modulus layer (A);
- the process comprising:
- molding a low-elastic modulus layer (A) and a high-elastic modulus layer (B) by at least one method selected from rolling, compression molding and stamping, to thereby provide a laminate having a groove on both sides thereof.
A process for producing a fuel cell separator having a surface layer on one side or both sides thereof, the surface layer comprising at least two layers, wherein the surface layer comprises a low-elastic modulus layer (A) having a bending elastic modulus of 1.0×101-6.0×103 MPa, and a bending strain of 1% or more;
- and a high-elastic modulus layer (B) having a bending elastic modulus exceeding 6.0×103 MPa, as at least one layer constituting the surface layer, other than the low-elastic modulus layer (A);
- the process comprising:
- molding a low-elastic modulus layer (A) and a high-elastic modulus layer (B) by at least one method selected from multi-layer extruding, multi-layer injection molding, compression molding or rolling, to thereby provide a laminate in the form of a sheet;
- and
- forming a groove on both sides of the laminate by compression molding or stamping.
Dependencies are inferred from the claim text.