Seal and fuel cell with the seal

A seal for stacks of polymer electrolyte fuel cells and for preventing fluid provided in a space of said fuel cells from leaking, said seal comprising:

• a base part, having a first coefficient of elasticity, that elastically ensures stiffness in the direction in which the base part and a seal part are stacked, having a first surface, a second surface, and a third surface, the second and third surfaces being opposite to the first surface, the third surface being closer to the first surface than the second surface;
• and
• said seal part, having a second coefficient of elasticity, elastically absorbs changes in length, in a laminated direction, of a member, that contacts the base part, is on the third surface of the base part and extends beyond a plane defined by the second surface of the base part, wherein the first coefficient of elasticity is higher than the second coefficient of elasticity,
• wherein said base part and said seal part are placed in a laminar arrangement.

A seal for stacks of polymer electrolyte fuel cells and for preventing fluid provided in a space of said fuel cells from leaking, said seal comprising:

• a base part having a first surface, a second surface, and a third surface, the second and third surfaces being opposite to the first surface, the third surface being closer to the first surface than the second surface;
• and
• a seal part on the third surface of the base part and extending beyond a plane defined by the second surface of the base part, wherein a coefficient of elasticity of the base part is higher than the coefficient of elasticity of the seal part, and
• wherein said base part and said seal part are placed in a laminar arrangement and said base part and said seal part are made of rubber.

A seal for stacks of polymer electrolyte fuel cells and for preventing fluid in a space of said fuel cells from leaking, said seal comprising:

• a base part, having a first coefficient of elasticity, that elastically ensures stiffness in the direction in which the base part and a seal part are stacked, having a first surface, a second surface, a third surface, and a fourth surface, the first surface being opposite to the second surface, the third surface being opposite to the fourth surface, and the distance between the first and second surfaces being greater than the distance between the third and forth surfaces;
• and
• said seal part, having a second coefficient of elasticity, elastically absorbs changes in length, in a laminated direction, of a member, that contacts the base part, is on the third and fourth surfaces and extends beyond a plane defined by the first surface and/or the second surface, wherein a coefficient of elasticity of the base part is higher than the coefficient of elasticity of the seal part,
• wherein said base part and said seal part are placed in a laminar arrangement.