Technique for bonding tetrafluoroethylene sheet to metal substrate
Abstract
Abstract A METHOD OF BONDING A SHEET OF TETRAFLUOROETHYLENE MATERIAL TO A METAL PLATE OR SUBSTRATE, IN WHICH THE SURFACES OF THE SHEET AND PLATE TO BE JOINED ARE FIRST TREATED TO IMPROVE THEIR ADHESION ABILITY. THE TREATED SURFACES ARE THEN COATED WITH A SOLUTION CONSTITUTED BY AN EPOXY RESIN AND A DIANHYDRIDE CURING AGENT IN A MIXED SOLVENT FORMED BY TETRAHYDROFURAN AND DIMETHYLFORMAMIDE. THESE SURFACE COATINGS ARE DRIED AND THEN BROUGHT TOGETHER IN A HEATED PRESS TO EFFECT CURING AND BONDING THEREOF. ESSENTIALLY THE SAME METHOD IS USED TO EFFECT AN ELASTOMERIC BOND OF THE TWO MATERIALS, BUT IN THIS INSTANCE, THE EPOXY SOLUTION COATINGS, WHICH FURTHER INCLUDE AN ELASTOMER CONSTITUENT, ARE FIRST DRIED AND CURED TO PROVIDE A PRIMER, AFTER WHICH THEY ARE SPRAYED WITH AN ELASTOMER SOLUTION THAT IS THEN DRIED. THE PRIMED SHEET AND PLATE SURFACE HAVING A DRIED ELASTOMER LAYER THEREON ARE THEN PRESSED-CURED AND BONDED.
Inventors
- 👤 F Reick
Bibliographic Details
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