| 摘要 |
PURPOSE:To reduce the number of die cleaning times and obtain an excellent pneumatic tire satisfactorily maintaining the appearance of side sections themselves of the tire by devising a rubber composition material constituting the side sections of the tire from the beam section to the shoulder sections of the tire via side wall sections. CONSTITUTION:Fatty acid and zinc white which are die polluting materials are noticed, and minimum required specific fatty acid and a proper quantity of active zinc white are combined. A rubber composition material combined with fatty acid 0.1-2.0 pts.wt. with the carbon number 10-22 and active zinc white 0.3-4.0 pts.wt. with the specific surface area 4-6m<2>/g into rubber 100 pts.wt. made of diene rubber, ethylene-propylene copolymer rubber, butyl halogenide rubber or their mixture is used for outer layer sections of a pair of side sections connected to a tread section on both shoulders of the tread section. |
