Patent ID: 8997812
Filing Date: 2015-04-07
Classification: B29D,B60C,C08L,Y10S

Abstract:
1. A pneumatic tire having an inner liner comprising a rubber composition for a pneumatic tire in which the ML 1+4 Mooney viscosity measured at 130° C. of an unvulcanized rubber of the rubber composition for a pneumatic tire comprising a butyl rubber is in the range 45 to 55, wherein said rubber composition for a pneumatic tire comprises 4 to 6 parts by weight of a mix resin and 1.5 to 2.5 parts by weight of a phenol adhesive resin based on 100 parts by weight of a rubber component which consists of 70 to 100% by weight of a halogenated butyl rubber and 30 to 0% by weight of a natural rubber, wherein a butyl rubber gauge of a shoulder portion of a finished tire is 0.25 to 1.50 millimeters in thickness, and the average value and standard deviation of the butyl rubber gauge of a shoulder portion of a finished tire satisfy the relationship: wherein said pneumatic tire is made by a process in which the unvulcanized tire including the unvulcanized inner liner is molded and vulcanized by heating and pressuring the unvulcanized tire in a vulcanizer such that the rubber flow of the inner liner during vulcanization is suppressed by controlling the Mooney viscosity (ML