Sumitomo Rubber Industries Ltd.

Kōbe-shi, Japan

Sumitomo Rubber Industries Ltd.

Kōbe-shi, Japan
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Patent
Sumitomo Rubber Industries Ltd. | Date: 2016-10-13

A purpose of the present invention is to provide a tire assuring that clogging of snow and sticking of snow are inhibited, particularly a tire assuring that clogging of snow and sticking of snow can be inhibited and having good performance on ice and snow and abrasion resistance without depending on the tread pattern form while maintaining wet grip performance and abrasion resistance. The tire is composed of a rubber composition which comprises a rubber component comprising a modified butadiene rubber and silica and has a pure water contact angle of from 125 to 140.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2016-10-19

Provided are a rubber composition that shows a balanced improvement in fuel economy and abrasion resistance while having good processability, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition containing: a rubber component including a copolymer containing a structural unit derived from a conjugated diene monomer, a structural unit derived from farnesene, and a structural unit derived from a compound represented by the formula (1) below; and carbon black and/or silica, wherein R^(11 )and R^(12 )are the same as or different from each other and each represent a hydrogen atom or a C1-C30 hydrocarbon group.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2017-05-17

A purpose of the present invention is to provide a tire assuring that clogging of snow and sticking of snow are inhibited, particularly a tire assuring that clogging of snow and sticking of snow can be inhibited and having good performance on ice and snow and abrasion resistance without depending on the tread pattern form while maintaining wet grip performance and abrasion resistance. The tire is composed of a rubber composition which comprises a rubber component comprising a modified butadiene rubber and silica and has a pure water contact angle of from 125 to 140.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2017-05-17

Provided are a rubber composition that shows a balanced improvement in fuel economy and abrasion resistance while having good processability, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition containing: a rubber component including a copolymer containing a structural unit derived from a conjugated diene monomer, a structural unit derived from farnesene, and a structural unit derived from a compound represented by the formula (1) below; and carbon black and/or silica,^(11) and R^(12) are the same as or different from each other and each represent a hydrogen atom or a C1-C30 hydrocarbon group.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2017-09-20

A laminated gasket to be inserted in a syringe barrel is provided, which prevents leakage of a highly permeable liquid drug which may otherwise occur when an inert film of the gasket does not intimately contact an inner wall of the syringe barrel. The inventive laminated gasket has a circumferential surface portion (17) to be kept in contact with an inner peripheral surface (16) of a syringe barrel (11), a liquid contact surface connected to one edge of the circumferential surface portion, a bottom surface (20) provided on the other edge side of the circumferential surface portion, and a threaded hole (21) extending from a center of the bottom surface (20) into a main body and adapted to be in threaded engagement with a distal end portion (18) of a plunger (12). The threaded hole (21) has an internal thread provided on an inner peripheral surface thereof as extending from a mouth thereof toward an innermost portion (22) thereof and including a plurality of periodic thread portions. Provided that at least an innermost one of the periodic internal thread portions adjacent to the innermost portion (22) of the threaded hole has a diameter F1, that the other periodic internal thread portions each have a diameter F2 and that at least a distal one of periodic thread portions of an external thread provided on the distal end portion of the plunger (12) has a diameter D1, a relationship F2 > D1 > F1 is satisfied.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2017-09-20

[Problem to be solved] To provide a pneumatic tire that can improve wear resistance of shoulder land portions while suppressing sideslip on snow and ice. [Solution] By providing shoulder main grooves 3 and a center main groove 4 in a tread part 2, the tread part 2 is divided into shoulder land portions 7 and middle land portions 8. A ratio (W1/W2) of a width (W1) of each of the shoulder land portions 7 to a width (W2) of each of the middle land portions 8 is 1.6 - 2.4. In each of the shoulder land portions 7, on a shoulder main groove 3 side, a shoulder narrow groove 10 that continuously extends in a tire circumferential direction with a groove width smaller than that of each of the shoulder main grooves 3 is provided. A first camber amount (C1), which is a tire radial direction distance between a tire equator position and a tread edge (Te) in a tread profile in a tire cross section that includes a tire rotation axis in a normal state, is 5.3% - 6.5% of a tread ground contact width (TW).


Patent
Sumitomo Rubber Industries Ltd. | Date: 2017-09-27

Provided are: a rubber composition for tires that achieves a balanced improvement in handling stability, crack resistance, ozone resistance, discoloration resistance, tire appearance, fuel economy, tensile strength, and scorch resistance; and a pneumatic tire formed from the rubber composition. The invention relates to a rubber composition for tires containing: a rubber component having a combined content of polybutadiene rubber, natural rubber, and polyisoprene rubber of 90% by mass or more based on 100% by mass of the rubber component; sulfur; and at least one nonionic surfactant selected from the group consisting of a Pluronic nonionic surfactant, and a nonionic surfactant represented by the formula (1) below and/or a nonionic surfactant represented by the formula (2) below, the rubber composition containing, per 100 parts by mass of the rubber component, 2-70 parts by mass of carbon black and 1-5 parts by mass of silica, and being free of silane coupling agents,^(1) represents a C6-C26 hydrocarbon group having an unsaturated bond, and d represents an integer,^(2) and R^(3) are the same or different and each represent a C6-C26 hydrocarbon group, and e represents an integer.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2017-09-27

The present invention provides a pneumatic tire that achieves a balanced improvement in fuel economy, wet grip performance, handling stability, abrasion resistance, fatigue resistance, and tensile strength. The present invention relates to a pneumatic tire including a tread formed from a rubber composition, the rubber composition having after vulcanization rubber properties satisfying certain values.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2017-09-20

A pneumatic tire 1 comprises a sidewall portion 3 provided with a side protector 9 protruding from a contour line S of the sidewall portion. The side protector 9 is composed of first protector blocks 11 arranged in the tire circumferential direction at intervals and second protector ribs 12 connecting therebetween. In a tire meridian section including each second protector rib 12, the second protector rib 12 has a triangular cross-sectional shape having an apex 13 at which the protruding height from the contour line S becomes maximum, and radially outer and inner oblique sides 14 and 15 extending radially outwardly and inwardly from the apex 13. Each of the radially outer and inner oblique sides 14 and 15 is a concave circular arc whose center is positioned outside the tire.


Patent
Sumitomo Rubber Industries Ltd. | Date: 2017-09-13

Provided is a high performance tire including a tread formed from a rubber composition which achieves a balanced improvement in grip performance, abrasion resistance, and processability. The present invention relates to a high performance tire including a tread formed from a rubber composition, the rubber composition containing: a rubber component including a styrene-butadiene copolymer (1); a styrene-butadiene copolymer (2); and a hydrogenated terpene aromatic resin, the styrene-butadiene copolymer (1) and the styrene-butadiene copolymer (2) differing in styrene content by 10% by mass or more.

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