EXPANDABLE CHAMBER, METHOD FOR MANUFACTURING THE SAME, TREAT VULCANIZATION UNDERSTANDING THE EXPANDABLE CHAMBER, AND PROCESS FOR MANUFACTURING VEHICLE WHEEL TIRES

摘要

An expandable bladder has at least one first layer of a natural or synthetic rubber-based material or a mixture thereof, 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 a bladder as well as a tyre manufacturing apparatus incorporating bladders is also disclosed.