Resin-laminated rubber closure for a medical vial

Claim 1

A resin-laminated rubber closure for a medical vial comprising an annular leg part to be inserted into the mouth of the vial, the leg part being notched at least at one position, and a flange part to be contacted with the front surface of the vial mouth, in which the outer and inner surfaces of the annular leg part are laminated with a chemical-resistant resin film except for the outer circumference of the upper end of the leg part to expose a rubber surface at this upper end leg part and to form an upper edge of the laminated portion and the leg part has a central ceiling part inside and one or more protrusions on the outer surface of the laminated portion, wherein the rubber surface above the upper edge of the laminated portion has a length (x) of 0.1 to 5 mm and wherein the height (m) of the central ceiling part inside the annular leg part from the upper edge of the laminated portion is in the range of 0.1 to 5 mm said chemical-resistant resin film being of a material selected from the group consisting of tetrafluoroethylene polymers, trifluorochloroethylene polymers, tetrafluoro-ethylene-hexafluoropropylene copolymers, vinylidene fluoride polymers, vinyl fluoride polymers, tetrafluoroethylene-ethylene copolymers and trifluorochloroethylene-ethylene copolymers and the central ceiling part inside the annular leg part having a height greater than that of the upper edge of the laminated portion.