LAMINATED PNEUMATIC TIRE AND METHOD OF MAKING SAME

摘要

A laminated pneumatic rubber tire is disclosed which may be free of reinforcing fabric and which is made of at least seven alternating layers of high-modulus and low-modulus polymeric material such as synthetic rubber, polyurethane rubber, and various elastoplastic and high-modulus plastic materials including polycarbonate, nylon, epoxide resins, polystyrene and the like. The alternating hard and soft layers provide the tire with a necessary durability and resistance to flex cracking. The tire may contain low-modulus polymeric layers with a Young's flexural modulus not in excess of 3000 pounds per square inch. The high-modulus layers of the tire may have a Young's modulus from 3000 to 50,000 or higher. The high-modulus layers have a 10 percent modulus which is at least twice that of the low-modulus layers. The polymeric material has a calculated molecular weight of at least 10,000.