Pneumatic tire
AssigneeThe Yokohama Rubber Co., Ltd.
InventorsTomoyuki WADA, Takamitsu CHAYA
Life of this patent
Estimating the term…
Abstract
In a pneumatic tire in which a reinforcing layer including a cord is embedded, a coating rubber covering the cord included in the reinforcing layer uses a rubber composition in which 30 parts by mass to 60 parts by mass of carbon black having a nitrogen adsorption specific surface area N2SA of 100 m2/g or more and 0 parts by mass or more and 10 parts by mass or less of aroma oil is optionally blended, per 100 parts by mass of a rubber component containing 70 mass % to 100 mass % of a natural rubber and in which a strength at break TB (unit: MPa) at 100° C. and a stress M100 (unit: MPa) at 100% elongation at 100° C. satisfy a relationship TB2/M100≥50.0.
Claims7
A pneumatic tire, comprising:
- a tread portion extending in a tire circumferential direction and having an annular shape;
- a pair of sidewall portions respectively disposed on both sides of the tread portion;
- a pair of bead portions each disposed on an inner side of the pair of sidewall portions in a tire radial direction;
- and
- a reinforcing layer including a cord embedded in at least one portion selected from the tread portion, the sidewall portions, and the bead portions;
- a coating rubber covering the cord included in the reinforcing layer being made of a rubber composition in which 30 parts by mass to 60 parts by mass of carbon black having a nitrogen adsorption specific surface area N2SA of 100 m2/g or more is blended and 0 parts by mass or more and 10 parts by mass or less of aroma oil is optionally blended, per 100 parts by mass of a rubber component containing 70 mass % to 100 mass % of a natural rubber and in which a strength at break TB (unit:
- MPa) at 100° C. and a stress M100 (unit:
- MPa) at 100% elongation at 100° C. satisfy a relationship TB2/M100≥50.0.
Dependencies are inferred from the claim text.