Abstract: Occurrence of uneven wear in a tire having a plurality of blocks is suppressed. A pneumatic tire according to the present invention includes, on a tread, a first intermediate land area formed on an inner side in a tire axial direction of a first shoulder main groove and a second intermediate land area formed on an inner side in the tire axial direction of a second shoulder main groove. Each of a plurality of first intermediate blocks provided in the first intermediate land area has a smaller area of a ground contact surface than each of a plurality of second intermediate blocks provided in the second intermediate land area. A step is formed on at least part of a circumferential edge of the first intermediate block. The step is not formed on a circumferential edge of the second intermediate block.

Abstract: A pneumatic tire capable of securing drainability of the main groove while improving rigidity of blocks and improving steering stability wherein an intermediate land area formed on an inner side of a shoulder main groove includes a plurality of intermediate blocks provided to be aligned in a tire circumferential direction, first intermediate lateral grooves provided between the intermediate blocks, and a plurality of first protrusions protruding from side walls of the intermediate blocks facing the shoulder main groove to the inside of the shoulder main groove. The first protrusion includes a first protrusion inclined surface connected to a ground contact surface of the intermediate block, a protruding height of which from a groove bottom of the shoulder main groove becomes smaller as going to a tip end, and at least part of a tip end of the first protrusion overlaps with a shoulder opening in a tire axial direction.

Abstract: A method for forming a belt-like rubber sheet S by extruding rubber on a drum outer peripheral surface 3a by an extruder 2 includes: a front end forming step for forming a front end S1 having a wedge-shaped cross section; an intermediate part forming step for forming an intermediate part S2 having a desired thickness; and a rear end forming step for forming a rear end S3 having a wedge-shaped cross section by gradually decreasing an extrusion amount of the rubber to zero from a predetermined extrusion amount in a predetermined time, gradually decreasing the rotational speed of the drum outer peripheral surface 3a to zero from a predetermined rotational speed in the predetermined time, and gradually decreasing a distance from the drum outer peripheral surface 3a to a die 21 to an extrusion end distance from a predetermined distance in the predetermined time.

Abstract: The ethanol synthesis catalyst is a catalyst for synthesizing ethanol from carbon dioxide, and includes at least one carrier selected from the group consisting of ZrO2, Al2O3, and TiO2; Fe and Cu supported on the carrier; and Na and/or K supported on the carrier. In one embodiment, the catalyst including iron oxide and copper oxide as the Fe and Cu supported on the carrier can be used, hydrogen can be supplied to the catalyst to reduce iron oxide and copper oxide, and a reaction gas containing CO2 can be supplied to the catalyst after reduction to obtain ethanol from CO2.

Abstract: An object is to provide a steel cord coating rubber composition that provides excellent workability and excellent peel resistance under heat aging conditions. The steel cord coating rubber composition includes, per 100 parts by mass of a diene-based rubber, 1 to 5 parts by mass of 1,6-hexamethylenediamine-sodium dithiosulfate dihydrate and 0.1 to 1 part by mass of 1,3,5-triazine-2,4,6-trithiol, and the content ratio between 1,6-hexamethylenediamine-sodium dithiosulfate dihydrate and 1,3,5-triazine-2,4,6-trithiol (1,6-hexamethylenediamine-sodium dithiosulfate dihydrate/1,3,5-triazine-2,4,6-trithiol) on a mass basis is 1.6 or more.

Abstract: A rubber composition for tires, comprising a rubber component and a vegetable oil wherein the vegetable oil contains palmitic acid and oleic acid in a mass ratio ((palmitic acid)/(oleic acid)) of 0.65 or more and 1.2 or less. It is preferred that the vegetable oil is palm oil. It is more preferred that the vegetable oil has an iodine value of 50 or more and 75 or less. It is more preferred that the vegetable oil has an oleic acid content of 40% by mass or more and 53% by mass or less.

Abstract: Provided are a rubber composition, which is capable of providing excellent ozone resistance while suppressing discoloration, and a pneumatic tire using the same. The rubber composition includes a diene-based rubber, a filler, a phenylenediamine represented by the following formula (1) (wherein R1 and R2 are each an alkyl group or aryl group with 7 or more carbon atoms, provided that at least one of R1 and R2 is an alkyl group with 7 or more carbon atoms), and a quinoline-based antioxidant, and is free of N-phenyl-N?-isopropyl-p-phenylenediamine (IPPD) and N-phenyl-N?-(1,3-dimethylbutyl)-p-phenylenediamine (6PPD).

Abstract: A mounting structure of a dynamic damper capable of effectively reducing the vibration of a vibration body is provided. The mounting structure includes a suspension member 100 inhibiting the upward shift of a mass member 5. The suspension member 100 and plates 3 are configured as separate members, so that as compared with the case where a pair of plates 3 are coupled, the opposite interval between the plates 3 can be determined without being affected by the dimension accuracy of such the coupling portion. Thus, the thicknesses of the rubber elastic bodies 4 can foe formed at high accuracy, so that the mass member 5 can be easily vibrated at the desired frequency. Therefore, the vibration of the suspension member 100 can be effectively reduced.

Abstract: In a pneumatic tire, a plurality of lands include a first land, the first land comprises a plurality of circumferential grooves that extend in a tire circumferential direction and that are arrayed in a tire axial direction, the plurality of circumferential grooves are respectively arranged at portions in the tire circumferential direction of the first land, the plurality of circumferential grooves include a first circumferential groove which is arranged in inwardmost fashion in the tire axial direction, and a second circumferential groove which is arranged in outwardmost fashion in the tire axial direction, and as viewed in a tire meridional section, an inner space area of the first circumferential groove is greater than an inner space area of the second circumferential groove.

Abstract: A rubber member molding method for molding a rubber member having a belt shape by attaching rubber discharged from a die to a molding surface while relatively moving the die and the molding surface in a direction along the molding surface, the rubber member molding method includes setting, as an abutting position, a position where a first one of the die and the molding surface is moved in a direction of moving closer to a second one and abuts on the second one before start of molding, and setting, as a molding start position, a position where the first one is moved from the abutting position in a direction of moving away from the second one by a desired thickness of a rubber member at the start of molding.

Abstract: A pneumatic tire includes a decorative area 11 provided on a sidewall surface 10, in which three kinds of planes 21, 22, and 23 with different inclinations with respect to a profile surface 20 are tightly arranged in the decorative area 11, two kinds of planes 21, 22, or 23 from the three kinds of planes 21, 22, and 23 are aligned in a first direction to make a pair, plural kinds of pairs with different combinations are aligned in a second direction, and boundaries 24 between each two planes 21, 22, or 23 aligned in the first direction are shifted in the first direction between the pairs adjacent in the second direction.

Abstract: A pneumatic tire includes a sidewall extending in a tire radial direction, the sidewall comprises a first side block which protrudes outwardly in a tire axial direction, the first side block comprises a first region which is arranged at an inwardmost location in the tire radial direction of the first side block, a second region which is contiguous with a location toward an exterior in the tire radial direction of the first region, and a third region which is contiguous with a location toward an exterior in the tire radial direction of the second region, the second region protrudes more than the first region, and the third region protrudes more than the second region.

Abstract: An anti-vibration device is provided to enable improvement in a static spring constant of a bush in an axially perpendicular direction while suppressing an increase in a volume of the bush. A lower seat is formed to a position downward relative to a through hole on an axial end surface of a bush. The lower seat axially outwardly inclines downward to the outer circumferential surface of the bush. This lower seat enables suppression of an increase in a volume of the bush and improvement of a static spring constant of the bush relative to downward compressive deformation.

Abstract: A green tire manufacturing method according to an embodiment includes molding a combined body by attaching a belt band to an outer circumferential surface of a carcass band substantially expanded into a tire shape at a combined body molding position, pressing a surface of the combined body, moving the combined body from the combined body molding position to a sidewall molding position, and molding a sidewall on a side surface of the combined body at the sidewall molding position to form a green tire.

Abstract: A molding drum is provided in which a sheet-shaped rubber member for a tire is wound around an outer circumferential surface having a cylindrical shape. A plurality of segments are arranged in a drum circumferential direction, and the outer circumferential surface of the molding drum is formed by outer surfaces of the segments coinciding with each other. At least one of the plurality of segments is a tip-end holding segment including at least a first small segment and a second small segment that serve as small segments arranged in the drum circumferential direction. The first small segment can take a first state in which an outer surface of the first small segment coincides with an outer surface of the second small segment, and a second state in which at least a portion of the first small segment is disposed outward of the second small segment in a drum radial direction.

Abstract: A rubber composition for tire treads comprising zinc oxide wherein the zinc oxide contains aluminum and iron. It is preferred that the zinc oxide has a content of the iron of 15 ppm or more and 100 ppm or less and a content of the aluminum of 40 ppm or more and 100 ppm or less. It is more preferred that the zinc oxide has a ratio of a content of the iron to a content of the aluminum of 0.2 to 2.3. It is more preferred that the zinc oxide has a content of the iron of 15 ppm or more and 80 ppm or less.

Abstract: A rubber composition comprising a zinc oxide which comprises aluminum and iron. The zinc oxide's content of the iron is preferably 15 ppm or more and 100 ppm or less and the zinc oxide's content of the aluminum is 40 ppm or more and 100 ppm or less. The zinc oxide's ratio of a content of the iron to a content of the aluminum is preferably 0.2 to 2.3. The zinc oxide's content of the iron is preferably 15 ppm or more and 80 ppm or less. The rubber composition is used for rubber-steel cord composites.

Abstract: A color rubber composition for tires according to an embodiment contains a rubber component, a pigment other than black or white, a petroleum wax, and a white filler. The petroleum wax has a normal/iso ratio (mass ratio) of 70/30 to 90/10. The carbon number distribution for iso components in the whole petroleum wax is 1.0% or less for 25 or less carbon atoms, 4.0 to 8.0% for 26 to 32 carbon atoms, 5.0 to 15.0% for 33 to 44 carbon atoms, and 1.0% or more for 45 or more carbon atoms. The carbon number distribution for normal components in the whole petroleum wax is 5.0 to 18.0% for 25 or less carbon atoms, 40.0 to 48.0% for 26 to 32 carbon atoms, 15.0 to 27.5% for 33 to 44 carbon atoms, and 2.0% or more for 45 or more carbon atoms.