Introduction

Pneumatic tires are manufactured according to relatively standardized processes and machinery. Tire factories start with bulk raw materials such as rubber, carbon black, and chemicals and produce numerous specialized components that are assembled and cured. Within the tire industry a tire retaining proper inflation pressure has improved rolling resistance compared to conditions where it is under inflated. The inner liner is an extruded halobutyl rubber sheet compounded with additives that result in low air permeability. The inner liner assures that the tire will hold high-pressure air inside, without the air gradually diffusing through the rubber structure. Heat facilitates a polymerization reaction that crosslinks rubber monomers to create long elastic molecules including halobutyl rubber in the innerliner. These kinds of polymers create the elastic quality that permits the tire to be compressed in the area where the tire contacts the road surface and spring back to its original shape under high-frequency cycles.

Cenway bromobutyl and chlrobutyl are well-suited for the production of inner liners ad sidewalls because of their resistance to weather, adhesion, bend and flex characteristics.

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