Control specifications: iodine absorption number 43(7 more or less) oil absorption number 121(7 more or less) heating loss ¡Ü1.5 300%modulus at a definite elongation --0.9(1.6 more or less) N550 is suitable for the natural rubber and each kind of synthetic rubber. It is easy to disperse and can endow with high endurance capacity, pressing out with high speed, the shape of meatus inflates slightly, pressing out smooth surface. Vulcanixed rubber has high temperature performance and heat conduction performance reinforce strong performance, elasticity and and easy to be recovered. It is mainly used in the tire cord rubber, sidewall tyre, radial tire,bias tire,the tire tube and rolling product.