| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire produced by using a rubber composition having suppressed heat-generation without deteriorating the processability or a rubber composition having increased durability while keeping the elongation at break. SOLUTION: The invention provides a pneumatic tire produced by using a rubber composition, as a belt cushion and/or an upper bead filler, obtained by compounding 100 pts.wt. of a rubber containing 50-100 pts.wt. of a stable low viscosity solid NR produced by spray-drying an NR latex with a pulse wave and 50-0 pts.wt. of an NR and/or a polyisoprene rubber with 20-65 pts.wt. of a carbon black having an IA of 50-100 mg/g and a DBP absorption of 60-140 ml/100 g; and a pneumatic tire produced by using a rubber composition, as a belt edge cushion, obtained by compounding 100 pts.wt. of a rubber containing≥40 pts.wt. of the above stable low viscosity NR and≤60 pts.wt. of an NR and/or a polyisoprene rubber with 45-65 pts.wt. of a carbon black having an IA of 50-120 mg/g and a DBP absorption of 60-110 ml/100 g. COPYRIGHT: (C)2009,JPO&INPIT
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