Abstract: A pneumatic tire includes a land portion having a circumferential direction sipe extending in a direction inclined with respect to the tire circumferential direction, a partial land portion positioned on at least one of the land portion partitioned with the circumferential direction sipe, and a plurality of cross sipes extending in a direction intersecting with the circumferential direction sipe in the partial land portion. The partial land portion includes a wide end portion and a narrow end portion. The plurality of cross sipes include a wide portion sipe located closest to a wide end of the partial land portion, and a narrow portion sipe located closest to a narrow end of the partial land portion. The wide portion sipe has a distal end positioned in a sipe projection portion, and the narrow portion sipe has a distal end positioned in a non-sipe projection portion.

Abstract: The present invention focuses on a change in elastic modulus or rupture stress of a liquid crystalline polymer that occurs when the liquid crystalline polymer undergoes phase transition from a liquid crystalline phase to an isotropic phase. The thermoresponsive material comprises a liquid crystalline polymer that reversibly transitions between a liquid crystalline phase and an isotropic phase, in response to a change in temperature, the liquid crystalline polymer serving as a matrix. Satisfied is E1/E2?1000, where E1 represents the elastic modulus of the matrix when the matrix includes the liquid crystalline phase, and E2 represents the elastic modulus of the matrix when the matrix includes the isotropic phase. Satisfied is ?1/?2?40, where ?1 represents the rupture stress of the matrix when the matrix includes the liquid crystalline phase, and ?2 represents the rupture stress of the matrix when the matrix includes the isotropic phase.

Abstract: A rubber composition comprises a diene rubber, a hydrocarbon type wax, cashew oil and a processing aid. The rubber composition can suppress whitening of a rubber surface and additionally can give black and luster to the rubber surface. The processing aid comprises at least one selected from the group consisting of a fatty acid metal salt, a fatty acid amide, a fatty acid ester and a fatty acid ester amide, wherein the proportion of constituent fatty acids having from 18 to 20 carbon atoms is from 20 to 60 mass %. A pneumatic tire has a rubber part (for example, a tread rubber, a side wall rubber or a rim strip) comprising the rubber composition.

Abstract: A rubber composition for vibration-damping rubber contains a rubber component comprising at least one or more diene-based rubbers, a complex zinc flower, and a bismaleimide compound. The rubber composition for vibration-damping rubber preferably contains 2 to 40 parts by weight of the complex zinc flower, and 0.5 to 5 parts by weight of the bismaleimide compound for 100 parts by weight of the rubber component.

Abstract: A pneumatic tire includes a tread surface which is sectioned into a center area, a mediate area arranged in an outer side of the center area, and a shoulder area arranged in an outer side of the mediate area, wherein inclined grooves are formed spaced apart in a tire circumferential direction, the inclined grooves continuously extending from the mediate area to the shoulder area, in blocks in the mediate area and the shoulder area sectioned by the inclined grooves, an angle of inclination of a side wall on a leading side with respect to a normal direction of the tread surface is greater than an angle of inclination of a side wall on a trailing side with respect to a normal direction of the tread surface, and a plurality of dimples are formed in the side wall on the leading side of the block in the mediate area.

Abstract: [PROBLEM] To provide a method for manufacturing a rubber composition that will serve as raw material for vulcanized rubber which excels in tear resistance, wet performance, and ability to achieve reduced heat generation. [SOLUTION MEANS] Manufacture of a tire or of a rubber composition by means of a method comprising an operation in which (a) a wet master batch comprising a first rubber and a first carbon black, (b) a second rubber comprising styrene-butadiene rubber, and (c) a second carbon black are dry-blended together under specific conditions.

Abstract: A stopper includes: a mounting hole into which an inside member is inserted; and a plurality of surface ribs and a plurality of rear surface ribs. A plurality of surface ribs respectively protrude from the surface and linearly disposed. A plurality of the rear surface ribs, on a rear surface, respectively protrude from between the surface ribs and linearly disposed. In a predetermined region in a circumferential direction of the mounting hole, intervals between the surface ribs adjacent to each other and intervals between the rear surface ribs adjacent to each other are set to be constant throughout an entire length in an extending direction in which the surface ribs and the rear surface ribs extend.

Abstract: A pneumatic radial tire includes a bead filler, a carcass ply, a steel protection layer, and an organic fiber protection layer. A reinforcing rubber sandwiches a wind-up end of the steel protection layer. A relationship of 1?A/B?2 is satisfied between a width A from the wind-up end of the steel protection layer to a tire inner surface, and a width B from the wind-up end of the steel protection layer to a tire outer surface. The wind-up end of the carcass ply is covered with a ply cover member. A relationship of 0.8?D/C?1.2 is satisfied between a thickness C of a second bead filler positioning between the ply cover member and a first bead filler, and a thickness D of the reinforcing rubber positioning between the ply cover member and the steel protection layer.

Abstract: The invention provides a pneumatic radial tire which improves durability by lowering breakdowns in both of a ply end and a wind-up portion without an increase of weight and manufacturing cost. The pneumatic radial tire has a carcass layer which is provided between a pair of bead portions and is locked in a state in which end portions are wound up to the bead cores. The carcass layer is constituted by a first ply, a second ply and a third ply which are laminated one by one from an inner side to an outer side in a tire radial direction in a tire equator. The first ply and the third ply are wound up to the bead cores. The second ply terminates in a state in which the second ply is interposed between the first ply and the third ply, without reaching the bead cores.

Abstract: An insulator includes a first portion, a second portion, a pair of coupling portions, a first stopper surface and a second stopper surface, and a plurality of protrusions. The second portion is arranged underneath the first portion across a predetermined virtual axis. The pair of the coupling portions couple the first portion to the second portion. The pair of the coupling portions are separately arranged on both sides in an axis-perpendicular direction of the virtual axis. The first stopper surface and the second stopper surface are famed on the first portion and the second portion, respectively, between the pair of the coupling portions with intervals to the coupling portions. The plurality of the protrusions project from at least one of the first stopper surface and the second stopper surface. The plurality of the protrusions are arranged in an axial direction and the axis-perpendicular direction of the virtual axis.

Abstract: A pneumatic tire includes a carcass ply wound up from an inner side to an outer side around bead cores, chafers wound up from an outer side to an inner side around the bead cores, and an inner liner rubber which is arranged in an inner side of the carcass ply, wherein a squeegee rubber having a higher modulus than the inner liner rubber is provided closer to the inner liner rubber side than the chafers between the carcass ply and the inner liner rubber, and the squeegee rubber is arranged so as to cover inside wound-up ends of the chafers, and is provided with a thick portion which is thicker than the inner liner rubber, and thin portions which are arranged respectively in an inner side and an outer side in the tire diametrical direction of the thick portion and are thinner than the inner liner rubber.

Abstract: This monitoring sensor is provided with polymer matrix layers 3 containing a magnetic filler and attached to an outer casing or an electrode group, and a magnetism detection unit 4 for detecting a change in magnetism. The magnetic filler is magnetized in the in-plane direction of the polymer matrix layers 3. An interface layer 5 is formed between the polymer matrix layers 3 that are arranged with edges thereof facing each other. The directions of magnetization of the magnetic filler on one side and the other side having the interface layer 5 interposed therebetween are opposite to each other and intersect with the interface layer 5 as viewed in the thickness direction of the polymer matrix layers 3. The magnetism detection unit 4 is disposed on a straight line L1 passing through the interface layer 5 and extending in the thickness direction of the polymer matrix layers 3.

Abstract: A pad main body is bonded integrally with an inner pad while covering the front side of the inner pad. A back-side reinforced fabric located on the back side of the pad main body and the inner pad is integrally bonded on the back side of the inner pad and the pad main body by impregnation of foamed synthetic resin materials constituting the inner pad and the pad main body. This allows impregnation of the foamed synthetic resin materials in the back-side reinforced fabric located on the back side of the inner pad and the pad main body. This consequently allows providing a high hardness on the back side of the inner pad while ensuring hardness on the back side of the pad main body.

Abstract: A pneumatic tire has a tread rubber made of a nonconductive rubber. The tread rubber is provided with a first and second conductive portions made of a conductive rubber. The first conductive portion extends radially inwardly from a ground-contacting surface, extends to one side in tire width direction, and reaches a carcass layer or a side wall rubber. An exposed position of the first conductive portion is separated from a tire equator at a distance is equal to or more than 10% of a ground-contacting width. The second conductive portion extends radially inwardly from the ground-contacting surface, extends to another side in tire width direction, and reaches the carcass layer or the side wall rubber. An exposed position of the second conductive portion is separated from the tire equator at a distance is equal to or more than 10% of the ground-contacting width.

Abstract: An apparatus of manufacturing a rubber member includes an extruder; a mouthpiece; and a support surface which faces the mouthpiece in an opposed manner. The support surface and the mouthpiece are moved relative to each other thus molding a rubber member on the support surface. The apparatus further includes: a rubber pool portion formed between the mouthpiece and the support surface; and a closing surface having an inclined surface shape and capable of closing a moving-direction front side of the rubber pool portion.

Abstract: In a pneumatic tire according to an embodiment, a plurality of blocks are arranged in a tire circumferential direction in a land portion partitioned by a main groove extending in the tire circumferential direction, a depth of a transverse groove between the blocks adjacent in the tire circumferential direction ranges from 20% to 35%, inclusive, of a depth of the main groove, and a sipe narrower in width than the transverse groove is disposed on a bottom portion side of the transverse groove.

Abstract: A rubber composition comprises a diene rubber, a hydrocarbon type wax, cashew oil and a processing aid. The rubber composition can suppress whitening of a rubber surface and additionally can give black and luster to the rubber surface. The processing aid comprises at least one selected from the group consisting of a fatty acid metal salt, a fatty acid amide, a fatty acid ester and a fatty acid ester amide, wherein the proportion of constituent fatty acids having from 18 to 20 carbon atoms is from 20 to 60 mass %. A pneumatic tire has a rubber part (for example, a tread rubber, a side wall rubber or a rim strip) comprising the rubber composition.

Abstract: A rubber composition for a tire that can reduce rolling resistance is provided. The rubber composition for a tire contains a diene rubber, at least one reinforcing filler selected from the group consisting of silica and carbon black, and at least one sucrose derivative selected from the group consisting of sucrose benzoate and sucrose acetate, wherein the amount of the sucrose derivative is from 1 to 25 parts by mass per 100 parts by mass of the diene rubber. A pneumatic tire having a rubber part comprising the rubber composition is provided.