Pirelli Tyre S.p.a.

Pirelli Pneumatici S.p.a.

Massimo Loprevite

Gaetano Lo Presti

Giovanni Pozzati

Ignazio De Gese

Rodolfo Noto

An expandable bladder has at least one first layer of butyl material and one second layer of silicone material, radially external to the first layer. The first and second layers have an undulated interface profile defining mechanical-engagement elements between the first and second elastomer materials. A process for manufacturing bladder as well as a tire molding and vulcanizing apparatus incorporating the bladder.

Expandable bladder for tyre-curing apparatuses, a manufacturing method thereof, and a process for manufacturing tyres for vehicle wheels

An expandable bladder has at least one first layer of butyl material and one second layer of silicone material, radially external to the first layer. The first and second layers have an undulated interface profile defining mechanical-engagement elements between the first and second elastomer materials. A process for manufacturing bladder as well as a tire molding and vulcanising apparatus incorporating the bladder.

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Milan, Italy

Massimo Loprevite