Sumitomo Rubber Industries Limited

Hirotoshi Otsuki

Tatsuya Miyazaki

Wako Iwamura

Toshiaki Sakaki

Makoto Sugiya

Yuka Yokoyama

Ryo Mashita

Yuki Kasai

Noriyuki Nishi

According to the tire of the present invention having a tread composed of a rubber composition comprising, based on 100 parts by mass of a rubber component, 1 to 20 parts by mass of an ethylene-propylene-styrene copolymer, wherein the composition ratio thereof is 10 to 60% by mass of ethylene, 10 to 60% by mass of propylene, and 5 to 40% by mass of styrene; and 3 to 100 parts by mass of carbon black, a tire having a tread composed of a rubber composition excellent in chipping resistance can be provided.

Tire

An airless tire includes a tread ring, a hub formed on radial direction inner side of the ring to be fixed to an axle, and a spoke structure connecting the ring and hub. The ring includes a tread rubber layer, a first reinforcing cord layer, a second reinforcing cord layer and a shear rubber layer between the first and second cord layers, the first and second cord layers and shear layer are formed such that ratio Eb/Ee between tire circumferential direction tensile modulus Ebof the first cord layer and shear modulus Ee of the shear layer is 100 or greater and ratio Eb/Ee between tire circumferential direction tensile modulus Ebof the second cord layer and shear modulus Ee is 100 or greater, and each cord layer has topping rubber having loss tangent tan &#x3b4;b of 0.03 to 0.10 and tensile modulus E*b of 4 to 20 MPa.

Airless tire

Provided is a pneumatic tire including a base tread formed from a rubber composition that can highly improve fuel economy, wet grip performance, and abrasion resistance while maintaining the balance between them. The pneumatic tire includes a base tread formed from a rubber composition, the rubber composition containing predetermined amounts of an isoprene rubber, a specified hydrogenated terpene resin, and a specified carbon black.

Pneumatic tire

The present invention provides a modified natural rubber having a good balance of improved fuel economy, heat-aging resistance, processability, and breaking resistance, and a method for producing such a rubber. The present invention also provides a tire rubber composition and a pneumatic tire which are prepared using the modified natural rubber. The present invention relates to a highly purified, modified natural rubber whose pH is adjusted to 2 to 7.

Modified natural rubber, process for producing same, rubber composition for tire, and pneumatic tire

There is provided a radial tire reducing rolling resistance by having a breaker cushion or a side wall packing comprising a rubber composition in which the loss tangent tan &#x3b4; is reduced and the complex elastic modulus E* and the fracture feature are improved in good balance. A radial tire having a breaker cushion or a side wall packing comprising a rubber composition containing 20 to 55 parts by weight of carbon black having an iodine adsorption amount of 25 to 75 mg/g and a DBP oil absorption amount of 110 to 150 ml/100 g and 5 to 30 parts by weight of silica having a BET specific surface area of 115 to 200 m/g based on 100 parts by weight of a rubber component.

Growing community of inventors

Kobe, Japan

Hirotoshi Otsuki