| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire capable of manufacturing in a good working environment by specifying a prescribed range of the melting point and the amount used of a coumarone resin and to provide a pneumatic tire excellent in durability by preventing baldness rubber by increasing the adhesion between a rubber composition in an unvulcanized state and a bead wire.SOLUTION: There is provided a pneumatic tire using a bead wire on which a coumarone resin film is formed, wherein the coumarone resin constituting the coumarone resin film has a melting point of 75°C or more and less than the heating temperature and the amount of coumarone resin coated on the bead wire is 0.04 to 0.08 g/wire kg/wire mm. The heating temperature is the heating temperature of the bead wire when the bead core is manufactured and is preferably 90 to 110°C. The coumarone resin preferably has a melting point of 75°C or more and less than the heating temperature (°C) of -5°C. |
