Sumitomo Rubber Industries Limited

Masato Komatsuki

Shinichi Miyazaki

Isamu Tsumori

Tetsuya Kunisawa

Kazuhiko Kawamura

Yukishige Adachi

Youichi Mizuno

Keiichi Makino

Makoto Ishii

A tire of which tread rubber comprises a conducive rubber at least partially, the conducive rubber extending from the radially inner surface of the tread rubber to the ground contacting face, and the conducive rubber compounded from 100 parts by weight of diene rubber and 2 to 30 parts by weight of conductive short fibers, the conductive short fibers formed by coating reinforcing short fibers with a conductive substance, and the conductive rubber has a volume resistance of less than 1&times;10,ohm cm.

Vehicle tire including conductive rubber

A rubber composition for treads which contains silica and has a low electric resistance and further well-balanced characteristics such as a low rolling resistance, abrasion resistance and good wet performance can be obtained. The rubber composition comprises 40 to 90 parts by weight of silica and 5 to 40 parts by weight of diester of adipic acid based on 100 parts by weight of a diene rubber.

Rubber composition for tread

A pneumatic tire comprises a carcass ply made of cords each having a complex elastic modulus E* (kgf) and loss factor tan .delta. satisfying the following conditions: tan .delta.&gt;0; tan .delta..ltoreq.0.001.times.E*-0.173; tan .delta..ltoreq.-0.0003.times.E*+0.174: and E*.ltoreq.340, under a temperature of 120 degrees C.

Pneumatic tire with carcass cords having particular viscoelastic

Tire fabrics for reinforcing rubber which includes warps having straight portions arranged in parallel with each other at predetermined intervals and wefts woven with the warps. Each weft comprises a pair of parallel portions and a V-shaped connecting portion. The V-shaped connecting portion is provided at the edge portion of the tire fabric.

Tire including tire fabric and ply including tire fabric

A pneumatic tire which comprises a carcass turned up around bead cores and a belt comprising a ply of parallel hybrid cords disposed radially outside the carcass. Each hybrid cord comprises at least one aramid strand and at least one steel strand which are twisted together. The aramid strand is made of aramid fiber filaments twisted together, and the steel strand is made of a steel monofilament.

Pneumatic tire with hybrid steel/aramid belt cord

A pneumatic tire which is provided radially outside a carcass (6) with a belt (9) made of cords (10) embedded in topping rubber, each of the belt cords comprises four steel monofilaments (12A and 12B) including one or two waved steel monofilaments (12A) and unwaved steel monofilaments (12B), the four steel monofilaments having the same diameters are compactly twisted together so as to make alternate contact portions and non-contact portions (P) with a gap (T) between at least one waved steel monofilament and the adjacent steel monofilaments, and the four steel monofilaments have the same diameter (d) of 0.2 to 0.35 mm.

Growing community of inventors

Takasago, Japan

Masato Komatsuki