| 摘要 |
PURPOSE:To improve sealing reliability and separating easiness by providing an adhesion control layer for regulating the adhesion to plastic so as to be non-adhesive or weakly adhesive on the inner or outer surface of an adhesive coating layer between the metal or plastic parts of a composite lid. CONSTITUTION:An inner metal lid 1 of a composite lid A is provided with a top part 2, a skirt part 3 and an opening part 4 and an outer lid 10 thereof is provided with a top part 11 and a short skirt part 12. An adhesive coating film 5 containing cohesive failing adherent agent is provided on the exterior surface of the top part 2 of the inner lid 1 and of the skirt part 3 thereof and a masking ink layer 6 is provided continuously and peripherally from the top part of the inner lid to the upper part of the skirt thereof excluding the double strip-like ring part extending continuously and peripherally immediately from the opening part of the top part thereof to the inner extremety of the outer peripheral corner thereof, thereby reducing the adhesion of the coating film 5 to a non-adhesive or weakly adhesive level. The exterior surface of the inner lid and the interior surface of the outer lid are bonded together with the adhesive coating film 5 provided on the top surface of the inner lid excluding the parts left uncoated by the asking ink layer 6. |
