Abstract: A motorcycle tire having improved water draining capacity and achieving both excellent dry and wet performance. A motorcycle tire including an annularly formed tread; in which the tread has main grooves; and in which at least one main groove of the main grooves has two or more widened portions that are enlarged outward in the groove width direction in at least one of the groove wall on the first grounding side in the rotational direction and the groove wall on the later grounding side in the rotational direction.

Abstract: Provided is an elastomer reinforcement cord with improved rust inhibition. An elastomer reinforcement cord (10) includes metal filaments and a polymer material. The elastomer reinforcement cord (10) has a multi-strand structure which includes: at least one core strand (21) formed by twisting plural metal filaments (1a) and (1b) together; and two or more sheath strands (22) each formed by twisting plural metal filaments (11a) and (11b) together, and in which the sheath strands are twisted together around the core strand. In a region surrounded by a line connecting the centers of the metal filaments constituting the outermost sheath layer of the core strand at a cross-section in a direction orthogonal to an axial direction after vulcanization of the core strand, when a region occupied by other than the metal filaments is defined as a gap region, a filling rate, which is a ratio of the area of the polymer material with respect to the gap region, is 52% to 120%.

Abstract: A power reception apparatus is installable in a vehicle and configured to receive electric power from a power transmission coil embedded in the ground. The power reception apparatus includes: a relay coil that is arranged on a tired wheel, which includes a tire and a wheel, and includes a first coil and a second coil; a power reception coil; and a power reception circuit. The first coil and the second coil are connected with each other by an electrical conductor. The first coil is arranged inside the tire. The second coil is located so that a distance from a central axis of the tired wheel to the second coil is shorter than a distance from the central axis to the first coil. The power reception coil is located so that when the first coil faces the power transmission coil, the power reception coil faces the second coil.

Abstract: A rubber composition contains a rubber component, an organic phosphoric acid compound having at least one alkyl chain, a vulcanizing agent, and a vulcanization accelerator. A content of a cobalt-containing compound is 0.00 parts by mass or more and less than 0.01 parts by mass as converted to a cobalt amount per 100 parts by mass of the rubber component. A content of N,N-dicyclohexyl-2-benzothiazolylsulfenamide is 0.00 parts by mass or more and less than 0.08 parts by mass per 100 parts by mass of the rubber component. The rubber composition can be used to produce a rubber-metal composite excellent in heat-resistant adhesion between a vulcanized rubber and a metal.

Abstract: A motorcycle pneumatic tire, in which the tread includes a central rubber and a side rubber, having a lower modulus than the central rubber, that are sequentially laminated in both tire widthwise side portions, the side rubber extending to a tire width-direction inner side further than a point at ¼ of a tread width on a tire width-direction outer side from a tire equator. A tire ground-contact surface has a tread pattern that includes plural inclined grooves and, when the tread width is equally divided in eight, a region constituting a range of ¼ to ? of the tread width on the tire width-direction outer side from the tire equator has the largest number of inclined grooves included per a single pitch of the tread pattern, and the depth of the inclined grooves is greater than the thickness of the side rubber in at least a part of the region.

Abstract: A method for cleaving a coordinate bond of a complex polymer that contains at least one polymer chain and a plurality of nitrogen- and/or phosphorus-containing functional groups which are bonded to the polymer chain and capable of forming coordinate bonds, wherein the coordinately-bondable nitrogen- and/or phosphorus-containing functional groups form a coordinate bond via a metal ion, characterized in that the method includes dissolving the complex polymer in a solvent containing a free ligand, to cleave the coordinate bond.

Abstract: An object of the present disclosure is to provide a polymer which is recyclable and capable of performing as equally well as a new product. Another object of the present disclosure is to provide a rubber composition containing said polymer, a method for manufacturing said rubber composition, and a rubber product containing said rubber composition. To achieve the objects, the present disclosure provides a complex polymer, comprising: a polymer main chain containing a conjugated diene unit and/or an olefin unit; and a functional group bonded to the polymer main chain, wherein: the functional group contains nitrogen atom and/or phosphorus atom therein and is complexed with a metal ion of an element of group 7-10 in the Periodic Table; and the bond dissociation energy for dissociation of the metal ion and the functional group is 200 kJ/mol or more.

Abstract: Provided is a motorcycle pneumatic tire in which the wet grip performance is improved while the steering stability during turning is ensured. The motorcycle pneumatic tire includes, on its ground-contact surface: a first inclined groove (21) that extends on a tire width-direction outer side from the vicinity of a tire equator and is inclined in the same direction as a tire rotation direction; and a short groove (22) that is arranged on the extension of a tire width-direction outer end of the first inclined groove (21).

Abstract: A tire mounting position detection system measures a first signal strength which is the strength of a radio signal received by a first receiver (R1) for each transmitter, measures a second signal strength which is the strength of the radio signal received by a second receiver (R2) for each transmitter, and calculates an strength ratio which is a ratio using the first signal strength and the second signal strength for each transmitter. The tire mounting position detection system detects a wheel position where a tire equipped with a transmitter is mounted on the basis of the first signal strength, the second signal strength and a strength ratio for each transmitter.

Abstract: To provide a rubber composition in which wet performance, wear resistance, low rolling resistance, and breaking resistance are highly balanced. A rubber composition comprising a rubber component comprising at least three polymers and a filler, wherein the rubber component is separated into at least two polymer phases: a polymer phase (1) with the highest tan ? peak temperature; and a polymer phase (2) with the lowest peak temperature; the polymer phases (1) and (2) are incompatible with each other; the polymer phase (1) at least comprises the modified conjugated diene-based polymers (A1) and (A2), and the filler; the modified conjugated diene-based polymer (A1) has a particular weight-average molecular weight and a particular contracting factor (g?); and when a filler concentration and an average aggregate area of the filler in the polymer phase (1) are defined as X and Y, respectively, an formula (1): Y<4.8X+1200 is satisfied.

Abstract: The rubber composition of the present disclosure contains carbon black, a bismaleimide compound, and a hydrazide compound, where the bismaleimide compound is represented by the following general formula (I), the hydrazide compound is represented by the following general formula (II), the carbon black has a nitrogen adsorption specific surface area (N2SA) of less than 40 m2/g and an oil absorption amount (COAN) of a compressed sample of 60 ml/100 g or more, and the content thereof is 35 parts by mass or more and less than 45 parts by mass with respect to 100 parts by mass of the rubber component.

Abstract: Processes for direct seeding of guayule seeds into a field and fields produced by the processes. According to these direct seeding processes, treated guayule seeds are mixed with a seed starting mixture to produce a planting mixture that is applied to exposed soil of a field. The applied planting mixture is then pressed or compressed which facilitates germination of the guayule seeds into seedlings.

Abstract: The present invention provides a metal cord having better adhesion to rubber compared to a conventional one, as well as a metal cord-rubber composite and a conveyor belt, including the same. In a metal cord (10) composed of a plurality of metal filaments (11) twisted together, the surfaces of the metal filaments (11) constituting the outermost layer are each provided with a zinc plating layer (16), and the degrees of crystal orientation of the (002) plane and the (102) plane of the surface of the zinc plating layer (16) are less than 120.

Abstract: A pneumatic tire includes an inner cylinder, an outer cylinder, and a connecting member. The outer cylinder and the connecting member elastically deformable, and the thickness of the thickest part of the outer cylinder is thicker than the thickness of the thickest part of the connecting member. When the outer cylinder is pushed by a protrusion and deformed toward the inside in a tire radial direction, at least a part of the connecting member, which is positioned between the protrusion and the inner cylinder, and other connecting members adjacent to the connecting member in the tire circumferential direction abut each other. When the non-pneumatic tire is mounted on a vehicle and travels on a flat contact plane, a gap is secured between the connecting member positioned between the ground plane and the inner cylinder and other connecting members adjacent to the connecting member in the tire circumferential direction.