Abstract: A pneumatic tire (10) according to the present invention includes blocks (100) arranged adjacent to each other in a tread surface view, each of the blocks (100) having a wheel tread contacted with a road surface. A circumferential edge (100f) of the block (100) is defined against an adjacent block (100B) adjacent to the block (100A) by a sipe (200). An inner side groove (400) is formed at an inner side in a tire radial direction of the sipe (200). At least a part of the inner side groove (400) is communicated with the sipe (200). The circumferential edge (100f) of the block (100A) is defined against the adjacent block (100B) by the inner side groove (400).

Abstract: An outer side rib 46 is formed at a side relative to the plural circumference direction main grooves that is at the vehicle outer side when the tire is mounted at a vehicle. A land portion of the outer side rib 46 is continuous in the tire circumference direction. Of the plural circumference direction main grooves, an outermost side circumference direction main groove 24 is formed at the vehicle outermost side when the tire is mounted. Fourth lug grooves 42 extend from the outermost side circumference direction main groove 24 toward the outer side rib 46. The groove width of each fourth lug groove 42 widens from the outermost side circumference direction main groove 24 side toward the outer side rib 46 side. The fourth lug grooves 42 terminate at the outermost side circumference direction main groove 24 side relative to a tire ground contact edge 16E.

Abstract: Provided is a pneumatic tire for motorcycles which can exhibit a performance of a new tire at an early period and enables visual confirmation that the tire as new is worn to such an extent as to be capable of sufficiently exhibiting its performance. The pneumatic tire for motorcycles includes a tread portion 10 formed into a ring shape, in which the tread portion 10 is provided with a width direction shallow groove 11b in which the shallow groove having a width of 0.1 to 2.0 mm and a depth of 0.1 to 2.0 mm is designed to extend at least in a tire width direction. A length of the width direction shallow groove 11b is greater than or equal to 50% of a width of a tire ground contact surface, and the width direction shallow groove 11b is provided at intervals which are shorter than a length of the tire ground contact surface.

Abstract: An epoxy resin exhibits a small change in volume after thermal history, is excellent in low thermal expansion and low moisture absorption, and has high heat resistance, in terms of a cured product obtained therefrom; a curable resin composition; a cured product which has all the above properties; a semiconductor encapsulating material; a semiconductor device; a prepreg; a circuit board; a buildup film; a buildup substrate; a fiber-reinforced composite material; and a molded article. The present invention is characterized by an epoxy resin, characterized by including as essential components, a cresol-naphthol co-condensed novolac type epoxy resin (A), a naphthol glycidyl ether compound (B), and one or more xanthene compounds (C) selected from the group of compounds represented by the following structural formulae (1) to (3), wherein the content of the xanthene compound(s) (C) is from 0.1% to 5.5% in terms of area ratio in a GPC measurement.

Abstract: Provided is a pneumatic tire for a motorcycle that is capable of early exhibiting performance of a new tire and that enables it to be visually confirmed that the new tire is worn to a degree that the tire can fully exhibit the performance. The pneumatic tire for a motorcycle includes a tread portion 1 formed into a ring shape, in which the tread portion 1 is provided with shallow grooves 2 having a width of 0.1 to 2.0 mm and a depth of 0.1 to 2.0 mm and extending in a tire circumferential direction.

Abstract: Provided are a curable resin composition capable of providing excellent heat resistance and toughness for a cured product, in which these physical properties are less deteriorated even in a case of being exposed to humidity and heat conditions, and a cured product, a fiber reinforced composite material, and a molded article thereof. The curable resin composition includes an epoxy resin and a curing agent, in which the epoxy resin is an epoxy resin obtained by the polyglycidyl-etherification of a phenol novolac resin. The phenol novolac resin contains bisphenol F having different binding sites, and in the bisphenol F components, the content of the [o, p?] conjugate is in a range of 30% to 45% relative to the total of the [o, p?] conjugate+the [o, o?] conjugate+the [p, p?] conjugate in terms of the area ratio according to a liquid chromatography measurement.

Abstract: Provided are a modified epoxy resin and a modified epoxy resin whose cured products exhibit good heat resistance and dielectric properties, methods for producing these, a curable resin composition, a cured product of the curable resin composition, and a printed wiring substrate. A modified phenolic resin comprises a phenolic resin structure (A), wherein at least one aromatic nucleus (a) in the phenolic resin structure (A) has, as a substituent, a structural segment (1) represented by structural formula (1) below: In the formula, Ar each independently represent a phenyl group, a naphthyl group, or a structural segment having, on an aromatic nucleus of a phenyl or naphthyl group, at least one substituent selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a halogen atom, a phenyl group, and an aralkyl group.

Abstract: There is provided a polyarylene sulfide dispersion coated with a cationic group-containing organic polymer compound and having high dispersion stability and excellent adhesion or adhesiveness to any one of substrates of plastic, metals, glass, and the like even at a high polyarylene sulfide resin concentration. The object is solved by providing a polyarylene sulfide dispersion including polyarylene sulfide particles, which are coated with a cationic group-containing organic polymer compound by a base precipitation method and thus exhibit high stability even at a high concentration, and also providing powder particles (fine particles) produced from the dispersion.