Abstract: This disclosure provides an inner liner of a pneumatic tire having high adhesiveness to an adjacent rubber member, which is an inner liner (100) of a pneumatic tire including a film layer (10) having at least a gas barrier layer (11) and an adhesion layer (20) disposed on at least one side of the film layer (10), where the gas barrier layer (11) contains at least a thermoplastic resin, the adhesion layer (20) contains at least a polystyrene-based thermoplastic elastomer, and the polystyrene-based thermoplastic elastomer has a styrene content of 40 mass % to 55 mass %.

Abstract: Provided is a pneumatic tire in which an electric resistance can be reduced without adversely affecting other performances such as tire durability or manufacturing processes even when low loss of a rubber member of the tire is attempted. The pneumatic tire includes a belt layer 2 provided at an outer side of a crown portion of a carcass 1 in a tire radial direction, and a rubber chafer 4 is provided at an outer surface of a bead portion in a tire width direction.

Abstract: At a pneumatic tire (11), in a pneumatic tire in which a reinforcing layer (11) is structured from at least one reinforcing ply (53) in which are embedded plural reinforcing cords (54) that are formed from steel and are inclined with respect to a tire equator S, an inclination angle A of the reinforcing cords (54) with respect to the tire equator S is within a range of 40 to 90°, and a compressive rigidity F per 50 mm width of a reinforcing layer (52) in a direction parallel to the reinforcing cords (54) is within a range of 1000 to 2400 N.

Abstract: Provided is a tire whose durability is improved by using, as a reinforcing member, a polyester cord having an improved heat resistant adhesive property to rubber. Provided is a tire in which a rubber-cord complex composed of a polyester cord and a rubber is used as a reinforcing member. The polyester cord is formed by twisting polyester filaments, and then subjecting the twisted filaments to an adhesive agent treatment. The polyester filament is made of a polyester fiber which is composed of a polyester having ethylene terephthalate as a main repeating unit and having an intrinsic viscosity of 0.85 or higher, wherein the amount of terminal carboxy group in the fiber is 20 equivalent/ton or larger, the long period according to small-angle X-ray diffraction is 9 to 12 nm, and a surface treatment agent having an epoxy group is attached to the surface of the fiber.

Abstract: Provided is a tire whose durability is improved by using, as a reinforcing member, a polyester cord having an improved heat resistant adhesive property to rubber. Provided is a tire in which a rubber-cord complex composed of a polyester cord and a rubber is used as a reinforcing member. The polyester cord is formed by twisting polyester filaments, and then subjecting the twisted filaments to an adhesive agent treatment. The polyester filament is made of a polyester fiber which is composed of a polyester having ethylene terephthalate as a main repeating unit and having an intrinsic viscosity of 0.85 or higher, wherein the amount of terminal carboxy group in the fiber is 20 equivalent/ton or larger, the long period according to small-angle X-ray diffraction is 9 to 12 nm, and a surface treatment agent having an epoxy group is attached to the surface of the fiber.

Abstract: A pneumatic tire having a reduced weight and improved durability is provided. In this pneumatic tire, at least one of the carcass ply and belt plies or the belt-reinforcement layer is constituted of reinforcing cords being para-aramid cords, and the para-aramid cords satisfy the relationship represented by the following formulae (I) to (III): E?32.14×T?236??(I) E?150??(II) T?19??(III) (where E represents a modulus of elasticity (cN/dtex) at 25° C. under a load of 49 N, and T represents a tensile strength (cN/dtex)).

Abstract: This invention provides a pneumatic tire provided with a carcass (4) comprised of one or more carcass plies formed by covering plural reinforcing cords arranged in parallel with a coating rubber and a pair of side reinforcing rubber layers (5) each having a crescent shape in section and disposed at an inside of the carcass, wherein ride comfort during usual running and durability during run-flat running are improved by applying a cord including a polyketone fiber and satisfying conditions of equation (I): ???0.01×E+1.2 and equation (II): ??0.02 [wherein ? is a heat shrinkage stress (cN/dtex) at 177° C. and E is an elastic modulus (cN/dtex) at 25° C. under a load of 49 N] to the reinforcing cord and a rubber composition having a loss tangent (tan ?) at 25° C. and 1% strain of less than 0.12 and a viscosity (G?) at 130° C. during unvulcanization of not less than 50 MPa to the coating rubber.

Abstract: This invention relates to a tire having an improved durability in the run-flat running without damaging the ride comfort in the usual running, and more particularly to a run-flat tire comprising a sidewall portion provided with a side reinforcing rubber layer having a crescent shape at section wherein a cord layer including a polyketone fiber cord satisfying the following conditions of the following equations (I) and (II): ???0.01×E+1.2??(I) ??0.02??(II) [wherein ? is a thermal shrinkage stress at 177° C. (cN/dtex) and E is an elastic modulus at 25° C. under a load of 49 N (cN/dtex)] is disposed in at least a part of a region A ranging from a belt end to a maximum width part of a tire side portion and a region B ranging from a neighborhood of a bead core to a bead filler.

Abstract: A pneumatic radial tire for a passenger car having a pair of bead portions and a carcass having at least one carcass ply toroidally extending between a pair of bead cores embedded in the respective bead portions and containing organic fiber cords. The organic fiber cord is a polyketone fiber cord satisfying the following equation: ???0.01E+1.2 and ??0.02, where ? is a thermal shrinkage stress at 177° C. (cN/dtex) and E is an elastic modulus at 25° C. under a load of 49N (cN/dtex). The cord has a ply-twisting coefficient N1 of 0.35-0.70 and a cable-twisting coefficient N2 of 0.50-0.95, where N1=n1×(0.125×D1/?)1/2×10?3, N2=n2×(0.125×D2/?)1/2×10?3, n1 is a ply twisting number (turns/10 cm), n2 is a cable twisting number (turns/10 cm), D1 is dtext of ply-twisted yarn, D2 is a total dtex, and ? is a specific gravity of the cord (g/cm3).

Abstract: A run-flat tire is provided in which the tire uniformity is improved, as well as the durability during run-flat traveling may be improved drastically without deteriorating the ride quality during normal traveling. The run-flat tire comprises a side reinforcing rubber layer having a crescent-shaped meridional cross section which layer extends all over or almost all over the both side portions along the inside of the carcass ply. The carcass ply cord contains at least 50% by mass of polyketone fibers, has a heat shrinkage force of 0.1 to 1.8 cN/dtex as a cord subjected to a dipping process, and the heat shrinkage rate of the polyketone fiber in a dry heat treatment at a temperature of 150° C. for 30 minutes is in a range of 0.3 to 6.5%; and the carcass ply includes a weft which crosses the cords arranged approximately along the radial directions, and the weft is cut at a plurality of points at regular intervals along the tire circumferential direction.

Abstract: A pneumatic tire having a reduced weight and improved durability is provided. In this pneumatic tire, at least one of the carcass ply and belt plies or the belt-reinforcement layer is constituted of reinforcing cords being para-aramid cords, and the para-aramid cords satisfy the relationship represented by the following formulae (I) to (III): E?32.14×T?236??(I) E?150??(II) T?19??(III) (where E represents a modulus of elasticity (cN/dtex) at 25° C. under a load of 49 N, and T represents a tensile strength (cN/dtex)).

Abstract: This invention provides a pneumatic tire provided with a carcass (4) comprised of one or more carcass plies formed by covering plural reinforcing cords arranged in parallel with a coating rubber and a pair of side reinforcing rubber layers (5) each having a crescent shape in section and disposed at an inside of the carcass, wherein ride comfort during usual running and durability during run-flat running are improved by applying a cord including a polyketone fiber and satisfying conditions of equation (I): ???0.01×E+1.2 and equation (II): ??0.02 [wherein ? is a heat shrinkage stress (cN/dtex) at 177° C. and E is an elastic modulus (cN/dtex) at 25° C. under a load of 49 N] to the reinforcing cord and a rubber composition having a loss tangent (tan ?) at 25° C. and 1% strain of less than 0.12 and a viscosity (G?) at 130° C. during unvulcanization of not less than 50 MPa to the coating rubber.

Abstract: This invention relates to a tire having an improved durability in the run-flat running without damaging the ride comfort in the usual running, and more particularly to a run-flat tire comprising a sidewall portion provided with a side reinforcing rubber layer having a crescent shape at section wherein a cord layer including a polyketone fiber cord satisfying the following conditions of the following equations (I) and (II): ???0.01×E+1.2 ??(I) ??0.02 ??(II) [wherein ? is a thermal shrinkage stress at 177° C. (cN/dtex) and E is an elastic modulus at 25° C. under a load of 49 N (cN/dtex)] is disposed in at least a part of a region A ranging from a belt end to a maximum width part of a tire side portion and a region B ranging from a neighborhood of a bead core to a bead filler.

Abstract: This invention relates to a pneumatic radial tire for a passenger car comprising a pair of bead portions and a carcass comprised of at least one carcass ply toroidally extending between a pair of bead cores embedded in the respective bead portions and containing organic fiber cords, characterized in that the organic fiber cord constituting the carcass ply is a polyketone fiber cord satisfying the following equation (I): ???0.01E+1.2 and ??0.02??(I) [wherein ? is a thermal shrinkage stress at 177° C. (cN/dtex) and E is an elastic modulus at 25° C. under a load of 49N (cN/dtex)] and the polyketone fiber cord has a ply-twisting coefficient N1 defined by the following equation (II) of 0.35-0.70 and a cable-twisting coefficient N2 defined by the following equation (III) of 0.50-0.95: N1=n1×(0.125×D1/?)1/2×10?3??(II) N2=n2×(0.