Abstract: Provided is a sulfur-based active material for a non-aqueous electrolyte secondary battery having a large charge/discharge capacity and excellent cycle characteristics which is inexpensively and easily provided, an electrode comprising the sulfur-based active material, and a non-aqueous electrolyte secondary battery comprising the electrode, as well as a producing method thereof. The sulfur-based active material is obtainable by calcinating a raw material, the raw material comprising (1) a heat-expandable particle comprising an outer shell comprising an acryl-based copolymer and a hydrocarbon included inside the outer shell, the heat-expandable particle having an expansion starting temperature of 150° C. or lower, and (2) sulfur.

Abstract: A golf tip plug housing includes an exterior surface configured to be securably affixed to a butt end of a golf club shaft and an interior surface configured to securably receive a golf tip plug having an outer diameter of either: (a) 7.0 mm-7.6 mm or (b) 4.0 mm-4.6 mm. In one aspect, a golf club includes a head and a shaft having a tip end attached to the head and a butt end opposite the tip end. A tip plug includes a stem and a head. The tip plug stem has an outer diameter sized to be insertable in the tip end. A tip plug housing has an outer diameter sized to be insertable in the butt end and an inner diameter sized to receive the tip plug. The tip plug is positioned in the tip plug housing and the tip plug housing is positioned in the butt end.

Abstract: A performance evaluation method for elastic material including rubber or elastomer, the method includes a step of applying a strain to a test piece made of the elastic material to form at least one void inside the test piece, a step of obtaining projected images of the test piece by irradiating the test piece with X-rays at a plurality of times after the at least one void is formed, and a step of obtaining a volume change of the at least one void between the plurality of times based on the projected images, as one of indexes of performance.

Abstract: An object of the present disclosure is to provide a rubber composition from which a crosslinked rubber molded product having good softness and excellent resilience performance can be obtained. The present disclosure provides a rubber composition containing (a) a base rubber, (b) a co-crosslinking agent, (c) a crosslinking initiator, and (d) an organic sulfur compound, wherein (d) the organic sulfur compound includes (d1) a polythiophene compound having two or more thiophene rings in the molecule.

Abstract: A heavy duty tire comprises a tread portion having circumferential grooves and land portions. The circumferential grooves include two shoulder circumferential grooves and a crown circumferential groove. The land portions include two of shoulder land portions and two crown land portions. The width W3 of the shoulder land portion is 17% to 28% of the tread width TW. The crown land portion is divided by crown shallow groove into crown blocks. The groove depth of the crown shallow groove is smaller than the groove depth of the crown circumferential groove. The groove bottom of the crown shallow groove is provided with a groove bottom sipe. The ground contacting top surface of the crown block is hexagonal, and the maximum circumferential dimension is 100% to 200% of the maximum axial dimension.

Abstract: A wood-type golf club head includes a depth in a front to rear direction no less than 80 mm, a striking face including a face center located in a virtual vertical center plane aligned with the face center and extending in the front to rear direction, a rear portion opposite the striking face, a heel portion, a toe portion opposite the heel portion, a crown, and a sole opposite the crown. The sole includes a first rail and a second rail projecting from the sole base surface and having a first length and a second length, respectively, in the front to rear direction that are less than 75% of the front to rear depth of the club head and the first rail and the second rail are entirely spaced in a heel to toe direction more than 15 mm from the virtual vertical center plane.

Abstract: A golf ball can include a core, a mid layer, and a cover. An amount P(Na) of a sodium ion-neutralized ionomer resin in abase resin of the cover can be not greater than 5 parts by mass. The golf ball can satisfy the following mathematical formulas (1) and (2): Fm / ( Hm * Tm ) - Fc / ( Hc * Tc ) ? 3. , and ( 1 ) Mc * Tc ? 10. , ( 2 ) where Hm: hardness (Shore D) of the mid layer, Tm: thickness (mm) of the mid layer, Fm: bending stiffness (MPa) of the mid layer, Tc: thickness (mm) of the cover, Fc: bending stiffness (MPa) of the cover, and Mc: melt flow rate (g/10 min) of the cover at a temperature of 190° C. under a load of 2.16 Kg.

Abstract: Provided is a tire comprising a tread at least having two layers each comprising a rubber component and a plasticizer, wherein a difference (AE1?AE2) between an acetone extraction amount AE1 of the rubber composition of the first layer and an acetone extraction amount AE2 of the rubber composition of the second layer is greater than 6.0% by mass, and wherein, with the first layer and the second layer being attached together, when they are applied with a dynamic stimulus under a condition of a dynamic stress of 0.45 MPa, a frequency of 50 Hz, and a temperature at 80° C. for 120 hours, a rate of change in acetone extraction amount of the rubber composition of the first layer before and after being applied with the predetermined dynamic stimulus is ?10% or more and 10% or less.

Abstract: A golf club head includes a loft between 20 degrees and 54 degrees and a main body including a top portion, a sole portion opposite the top portion, a heel portion, a toe portion opposite the heel portion, and a hosel portion extending from the heel portion. The hosel portion includes a hosel bore with an open end for receiving a golf club shaft and an abutment surface configured to support the golf club shaft, and an auxiliary recess extending sole-ward from the abutment surface, the auxiliary recess comprising a volume between 2 cubic centimeters and 3.5 cubic centimeters. The golf club head further includes a striking face defining a virtual face plane and having a face center, a virtual vertical plane perpendicular to the virtual face plane and extending through the face center, and a center of gravity spaced no more than 5 mm from the virtual vertical plane.

Abstract: A pneumatic tire 1 has a bead portion provided with a reinforcing rubber portion disposed adjacently to the axially outer side of a carcass. The reinforcing rubber portion comprises an axially inner rubber layer and an axially outer rubber layer. The radially outer end of the axially outer rubber layer is positioned radially outside the radially outer end of the axially inner rubber layer. The radially inner end of the axially outer rubber layer is positioned radially inside the radially inner end of the axially inner rubber layer.

Abstract: A golf club head includes a striking face having a face center and a virtual striking face plane generally parallel to the striking face. The golf club head further includes a sole portion, a top portion, a rear portion, and a loft L no less than 40°. A virtual vertical plane perpendicular to the striking face plane passes through the face center. A club head center of gravity is spaced from the virtual vertical plane in the heel-to-toe direction by a distance D1 that is no greater than 6.0 mm. The golf club head further includes a hosel including an internal bore configured to receive a golf shaft. The internal bore includes a peripheral side wall and a shaft abutment surface configured to abut a tip end of the golf club shaft. The hosel further comprises an auxiliary recess extending sole-ward from the abutment surface of the internal bore.

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: A motorcycle tire includes a tread portion including a crown portion that is a region of 50% of a tread development width centered on a tire equator, a first shoulder portion that is an outer region of the crown portion, and first lateral grooves. Each lateral groove includes a first groove portion in the crown portion, a second groove portion in the first shoulder portion, and a third groove portion connecting the first and second groove portions. A groove depth and a groove width of the third groove portion are respectively smaller than groove depths and groove widths of the first groove portion and the second groove portion, respectively. More than 80% of a tire axial length of the third groove portion is in the first shoulder portion.

Abstract: Provided is an evaluation method capable of evaluating stress on a bond which is difficult to detect by Raman spectroscopy. The present disclosure relates to an evaluation method including using infrared absorption spectra measured on a rubber specimen under application of no tensile force and under application of a tensile force to calculate an amount of peak shift caused by application of the tensile force, and evaluating stress in the rubber specimen from the amount of peak shift.

Abstract: Provided is a tire that allows reduction of uneven wear such as heel-and-toe wear around a plurality of closed sipes. The tire includes a tread portion 2. A plurality of closed sipes 8 are aligned in a tire axial direction in a land portion 4 of the tread portion 2. Each of the closed sipes 8 includes a sipe bottom 8d, a first end 8a and a second end 8b, a first sipe piece 11, a second sipe piece 12, a third sipe piece 13, and at least one tie bar 20. The closed sipes 8 aligned in the tire axial direction overlap each other in the tire axial direction and a tire circumferential direction. The tie bar 20 includes a first tie bar 21. A center, in a sipe length direction, of the first tie bar 21 is disposed closer to a first intersecting portion 18 than a center, in a length direction, of the first sipe piece 11 is. A distance from the first tie bar 21 to the first intersecting portion 18 is not greater than 25% of a length of the first sipe piece 11.

Abstract: An object of the present invention is to provide a golf ball having high visibility and little uncomfortableness at shot. The present invention provides a golf ball comprising a core and a cover disposed outside of the core, wherein a surface of the golf ball has a first region with a first color and a second region with a second color, the first color has hue H1 represented by H value in HSL color space, the second color has hue H2 represented by H value in HSL color space, and the H1 and the H2 satisfy a specific mathematical formula.

Abstract: An object of the present invention is to provide a golf ball having high visibility and excellent orientation at shot. The present invention provides a golf ball comprising a core and a cover disposed outside of the core, wherein a surface of the golf ball has a first region with a first color and a second region with a second color, the first color has hue H1 represented by H value in HSL color space, the second color has hue H2 represented by H value in HSL color space, and the H1 and the H2 satisfy the following mathematical formula (1): 60<|H1?H2|<300 ??(1).

Abstract: A golf club head includes a striking face having a face center and defining a face plane, a virtual vertical center plane perpendicular to the face plane and passing through the face center, a sole portion, a top portion, a heel portion, a toe portion, a hosel configured to receive a shaft, and a loft, L, no less than 39°. A center of gravity is spaced toe-ward from the vertical center plane by a distance, Dt, of greater than 0.0 mm. A moment of inertia, Iyy, measured about an axis extending in a heel to toe direction, parallel with a ground plane, passes through the center of gravity such that Iyy is no less than 1150 g·cm2.

Abstract: A motorcycle tire has a tread portion. The tread portion has a ground contact surface curved in an arc shape convex outward in a tire radial direction. The ground contact surface includes a central region and a first outer region. The ground contact surface has oblique grooves each including a portion inclined with respect to a tire circumferential direction. Each of the oblique grooves extends across the central region and the first outer region. Each of the oblique grooves includes a vertical groove portion extending at an angle ? of 20 degrees or less with respect to the tire circumferential direction. A minimum distance in a tire axial direction along the ground contact surface between the vertical groove portion and an outer edge of the central region is 30% or less of a maximum width in the tire axial direction of the central region along the ground contact surface.