Abstract: A tire having a tread portion, which can suppress deterioration in braking performance of tires on an icy road surface after repeated running; and the cap rubber layer forming the tread portion is formed from a rubber composition containing 40 parts by mass or more and 80 parts by mass or less of styrene-butadiene rubber (SBR) having a styrene content of 25% by mass or less in 100 parts by mass of the rubber component, containing silica and carbon black together with the rubber component, and having the loss tangent 30° C. tan ? of less than 0.25 measured under the conditions of temperature of 30° C., frequency of 10 Hz, initial strain of 5%, dynamic strain rate of 1%, and deformation mode: tensile; in the rubber composition, the carbon black content is more than 15 parts by mass with respect to 100 parts by mass of the rubber component, and the ratio of the silica content to the carbon black content is 1 or more; and the thickness of the tread portion is 15 mm or less.

Abstract: A tire having improved chipping resistance performance is provided, wherein the tire has a tread portion, the tread portion has a cap rubber layer and a base rubber layer provided radially inward of the cap rubber layer, the cap rubber layer contains, as a rubber component, 40 parts by mass or more and 60 parts by mass or less of styrene-butadiene rubber (SBR) with a styrene content of 25% by mass or less, and 30 parts by mass or less of isoprene-based rubber, in 100 parts by mass of the rubber component, and, as a filler, 100 parts by mass or less of silica with respect to 100 parts by mass of the rubber component; and is formed from a rubber composition having a loss tangent 30° C. tan ? of 0.25 or less measured under conditions of temperature of 30° C., frequency of 10 Hz, initial strain of 5%, and dynamic strain rate of 1%, and deformation mode: tensile; and the ratio of the thickness of the cap rubber layer to the thickness of the base rubber layer is 2.3 or more.

Abstract: A tire includes a first land portion with a ground contacting surface provided with inclined sipes inclined in a first direction to the tire axial direction. The inclined sipes include first and second inclined sipes arranged adjacently in the tire circumferential direction. Each first inclined sipe includes a first deep-bottom portion located on a first circumferential edge side, and a first shallow-bottom portion located on a second circumferential edge side and having a smaller depth than the first deep-bottom portion. Each second inclined sipe includes a second deep-bottom portion located on the second circumferential edge side, and a second shallow-bottom portion located on the first circumferential edge side and having a smaller depth than the second deep-bottom portion. Each second deep-bottom portion is arranged so as to overlap a projection region in which a respective first deep-bottom portion is expanded parallel to the tire axial direction.

Abstract: A pneumatic tire comprises a carcass, a bead apex rubber, and a bead reinforcing cord layer. The bead apex rubber has a radially outer edge positioned at a radial height of 15% to 25% of the tire section height. The bead reinforcing cord layer comprises an axially inner first part disposed on the axially outside of a carcass ply main portion, and an axially outer second part disposed on the axially inside of a carcass ply turned-up portion. The radially outer edge of the axially outer second part is radially outwardly spaced apart from the radially outer edge of the carcass ply turned-up portion by at least 5 mm.

Abstract: A putter-type golf club head that, when oriented in a reference position, includes a striking wall extending in the heel to toe direction and defines a substantially planar striking face for hitting a golf ball. A central elongate member is in communication with, and extends rearward from, the striking wall. An upper surface of the central elongate member includes a plurality of separate alignment elements. At least one of the plurality of alignment elements has an edge that extends substantially parallel to the striking face. The length of the parallel edge is substantially equivalent to the diameter of a golf ball.

Abstract: A tire including a tread portion, the tread portion having at least one main groove continuously extending in the tire circumferential direction, the tread portion including a rubber having a hardness at 60° C. of 58 or higher and a hardness at 0° C. of not more than 115% of the hardness at 60° C., the tread portion having a S50/S0 ratio of more than 1, wherein S0 denotes the sea proportion (%) in the tread ground contact surface of the new tire, and S50 denotes the sea proportion (%) when the tread portion is worn until the depth of the main groove reaches 50% of that of the new tire.

Abstract: A motorcycle tire comprises a carcass and a tread reinforcing layer. The tread reinforcing layer comprises a belt and a band. The band is composed of a jointless band ply having a developed width less than 65% of the developed tread width. The belt is composed of at least one belt ply having a developed width of 65% or more of the developed tread width. At first positions, the intersecting angle between the belt cords and the carcass cords is 20 to 60 degrees. In the tread portion in a tire meridional cross sectional view, a single arc passing through a point on the tread surface at the tire equator and two points on the tread surface at the tread edges has a radius of not more than 0.7 times the maximum tire cross-section width.

Abstract: A motorcycle tire comprises a tread reinforcement including a jointless band ply. The jointless band ply has a developed width Wa of not more than 65% of the developed tread width TWe. The tread portion has a tread profile comprising a crown arc portion having a radius R1 of curvature and a pair of shoulder arc portions having a radius R2 of curvature. The radius R1 is smaller than the radius R2 and smaller than 50% of the maximum tire cross-section width Wt. In a normal state of the tire, the axial ends of the crown arc portion are respectively positioned axially inward of the outer edges of the jointless band ply.

Abstract: An elastomer composition, containing a butadiene-based elastomer, and a temperature-responsive resin that changes its hydrophilicity with changes in temperature, the elastomer composition satisfying the following relationships at two given temperatures differing by at least 10° C.: (Elastic modulus at lower temperature and when immersed in water)/(Elastic modulus at lower temperature and when dry)?0.95, and (Elastic modulus at higher temperature and when immersed in water)/(Elastic modulus at higher temperature and when dry)>0.95, the lower temperature being lower than 25° C.

Abstract: The tire has a tread portion for which an intended tire rotational direction is specified. The tread portion comprises first inclined land portions defined between first inclined grooves. The first inclined land portion comprises an outer portion having a first wall surface and a second wall surface, and an inner portion having a third wall surface and a fourth wall surface. The angle ?1 of the first wall surface is smaller than the angle ?2 of the second wall surface, and the angle ?3 of the third wall surface is larger than the angle ?4 of the fourth wall surface.

Abstract: A plasticizer for resins and/or elastomers, the plasticizer containing a group that changes its interaction with respect to an antifreeze with changes in temperature, the group having a lower critical solution temperature of ?20° C. to 20° C.

Abstract: The present invention is characterized by including: a first member having a large diameter part and a small diameter part; a second member configured to be connected to the first member; and an element disposed between the first member and the second member, the first member having a recess on an end surface, the recess having a bottom that reaches a boundary position between the large diameter part and the small diameter part or a certain position on the side of the second member relative to the boundary position, the second member having a projection that is configured to fit into the recess with the element disposed between the recess and the projection, and having a screw hole extending to an inside of the projection to allow a screw part of the plunger to be screwed thereinto.

Abstract: An object of the present disclosure is to provide a golf ball having excellent durability and flight distance and good shot feeling for an average golfer who hits a golf ball at a slow head speed. The present disclosure provides a golf ball comprising a spherical core and at least two cover layers covering the spherical core, wherein a difference between a core surface crosslinking density and a core center crosslinking density is more than 1.0×102 mol/m3 and less than 9.0×102 mol/m3, a hardness difference between a core surface hardness Cs (Shore C hardness) and a core center hardness Co (Shore C hardness) is 13.0 or more and 30.0 or less, a compression deformation amount of the core when applying a load from an initial load of 98 N to a final load of 1275 N to the core is less than 3.

Abstract: A tire includes a tread portion having a ground contacting surface and a first groove. A tread rubber forming the tread portion includes a first rubber layer and a second rubber layer. The second rubber layer has a complex elastic modulus smaller than a complex elastic modulus of the first rubber layer. The first groove includes a first groove edge, a groove bottom surface, and a first groove wall. In a lateral cross section of the first groove, the first groove wall includes a first wide top portion arranged between the first groove edge and the groove bottom surface and located outside the first groove edge in a groove width direction of the first groove. The first wide top portion is positioned in the second rubber layer.

Abstract: An object of the present disclosure is to provide a golf ball having improved flight distance on driver shots and excellent spin performance on approach shots (particularly under the condition that there is grass between the golf ball and the club face) and on middle iron shots. The present disclosure provides a golf ball comprising a spherical core and a cover disposed outside the spherical core, wherein when a center hardness of the spherical core (Shore C hardness), hardnesses at 2.5 mm, 5 mm, 7.5 mm, 10 mm, 12.5 mm and 15 mm points from a center of the spherical core toward a surface of the spherical core (Shore C hardness), and a surface hardness of the spherical core (Shore C hardness) are represented by H0, H2.5, H5, H7.4, H10, H12.5, H15 and Hs respectively, the following relation is satisfied: (H2.5?H0)>(H12.5?H10)>(Hs?H15).

Abstract: An object of the present disclosure is to provide a golf ball having excellent durability and flight distance and good shot feeling for an average golfer who hits a golf ball at a slow head speed. The present disclosure provides a golf ball comprising a spherical core and at least two cover layers covering the spherical core, wherein a difference between a core surface crosslinking density and a core center crosslinking density is more than 1.0×102 mol/m3 and less than 9.0×102 mol/m3, a hardness difference between a core surface hardness Cs (Shore C hardness) and a core center hardness Co (Shore C hardness) is 13.0 or more and 30.0 or less, a compression deformation amount of the core when applying a load from an initial load of 98 N to a final load of 1275 N to the core is 3.

Abstract: An outer surface of a tire can include a tread surface and a pair of side surfaces. A contour line of the tread surface can include a center arc, a pair of middle arcs, a pair of side arcs, and a pair of shoulder arcs. A contour line of each side surface can be connected to the shoulder arc. A position, on the outer surface, corresponding to a ground-contact end obtained by applying a load that is 80% of a standardized load, to the tire in a standardized state, and bringing the tire into contact with a flat surface is a reference ground-contact position, and a boundary between the shoulder arc and the side arc is a reference boundary. The reference boundary can be located axially outward of the reference ground-contact position. A ratio of a distance in an axial direction from an equator plane to the reference boundary to a distance in the axial direction from the equator plane to a tread reference end TE can be not less than 0.94 and not greater than 0.98.

Abstract: An object of the present disclosure is to provide a golf ball having excellent flight distance on driver shots and good spin rate on middle iron shots. The present disclosure provides a golf ball comprising a spherical core and a cover, wherein a hardness difference (C1-C0), a hardness difference (C2-C1), a hardness difference (C3-C2) and a hardness difference (C4-C3) are more than 0 and 6.0 or less, a hardness difference (C5-C4) is 5.0 or more, and a hardness difference (C6-C5), a hardness difference (C7-C6) and a hardness difference (C8-C7) are more than 0 and 3.5 or less where C0 (center), C1, C2, C3, C4, C5, C6, C7 and C8 (surface) are a Shore C hardness at each point from the center obtained by dividing a radius of the spherical core into equal eight parts.