Gasket

Abstract

In order to inhibit a gasket ( 1 ) adhered to a plate body such as a separator ( 3 ) of a fuel battery or the like from being adversely affected by an elution component from an adhesion means, the gasket has a main lip ( 11 ), a back surface seal portion ( 12 ) formed in a back surface of the main lip and closely contacted with a separator (a plate body to be adhered) ( 3 ), an adhesion portion ( 14 ) arranged in a position in an opposite side to a space (S) to be sealed with respect to the back surface seal portion ( 12 ) and adhered to a bottom portion ( 31 a ) of a gasket installation groove ( 31 ) of the separator ( 3 ) via an adhesive agent ( 2 ), and an adhesive agent sump ( 15 ) formed between the back surface seal portion ( 12 ) and the adhesion portion ( 14 ) and holding an excess adhesive agent ( 2 a ).

1 . A gasket adhered to a plate body, comprising: 
 a back surface seal portion which is closely contacted with the plate body to be adhered; and    an adhesion portion adhered to said plate body to be adhered via an adhesion means at a position in an opposite side to a space to be sealed with respect to the back surface seal portion.    
   
   
       2 . The gasket as claimed in  claim 1 , wherein the back surface seal portion is formed in a back surface of a main lip.  
   
   
       3 . The gasket as claimed in  claim 1 , wherein the adhesion means is constituted by an adhesive agent, and an adhesive agent sump holding an excess adhesive agent is provided between the back surface seal portion and the adhesion portion.  
   
   
       4 . The gasket as claimed in  claim 1 , wherein the back surface seal portion is closely contacted with a bottom portion of a gasket installation groove formed in the plate body to be adhered.  
   
   
       5 . A gasket, wherein a gasket lip is integrally provided in an insulation layer interposed between separators of a fuel battery, and the insulation layer is adhered to a separator via an adhesion means in a region in an opposite side to a space to be sealed with respect to said gasket lip.  
   
   
       6 . The gasket as claimed in  claim 5 , wherein a gasket lip made of the same material as the insulation layer is integrally formed in the insulation layer.