percent of rubber material in aircraft tire?

Arnoldo Budzynski: The inner liner is an extruded halobutyl rubber sheet compounded with additivesThe body ply is a calendered sheet consisting of one layer of rubber, one layer of reinforcing fabric, and a second layer of rubber materials include rayon, nylon, polyester, and Kevlar; aircraft tires have progressively more pliesBeads are bands of high tensile-strength steel wire encased in a rubber compound. Bead wire is coated with special alloys of bronze or brass. Coatings protect the steel from corrosion. Copper in the alloy and sulfur in the rubber cross-link to produce copper sulfide, which improves bonding of the bead to the rubber. Beads are inflexible and inelastic, and provide the mechanical strength to fit the tire to the wheel.Tire makers continuously introduce new materials and construction methods in order to achieve higher performance at lower cost.Materials Natural rubber, or polyisoprene is the basic elastomer used in tire making Styrene-butadiene co! -polymer (SBR) is a synthetic rubber which is often substituted in part for natural rubber based on the comparative raw materials cost Polybutadiene is used in combination with other rubbers because of its low heat-buildup properties Halobutyl rubber is used for the tubeless inner liner compounds, because of its low air permeability. The halogen atoms provide a bond with the carcass compounds which are mainly natural rubber. Bromobutyl is superior to chlorobutyl, but is more expensive Carbon Black, forms a high percentage of the rubber compound. This gives reinforcement and abrasion resistance Silica, used together with carbon black in high performance tires, as a low heat build up reinforcement Sulphur crosslinks the rubber molecules in the vulcanization process Vulcanizing Accelerators are complex organic compounds that speed up the vulcanization Activators assist the vulcanization. The main one is zinc oxide Antioxidants and antiozonants prevent s! idewall cracking due to the action of sunlight and ozone Te! xtile fabric reinforces the carcass of the tire...Show more