Abstract: A belt layer includes at least one belt ply. The belt ply includes a single-wire cord having a short diameter SD and a long diameter LD, with a ratio SD/LD between the short diameter SD and the long diameter LD being less than 1.00, and a topping rubber covering the single-wire cord. The single-wire cord is arranged so that a direction of the short diameter SD is oriented to a thickness direction of the belt ply. The topping rubber has a complex elastic modulus (E*) of less than 7 MPa under conditions of temperature of 70 degrees Celsius, initial strain of 10%, an amplitude of dynamic strain of ±1.0%, and a frequency of 10 Hz.

Abstract: A belt layer includes at least one belt ply. The belt ply has a single-wire cord having a short diameter SD and a long diameter LD with a ratio SD/LD between the short diameter SD and the long diameter LD being less than 1.00, and a topping rubber covering the single-wire cord. The single-wire cord is disposed so that a direction of the short diameter SD is oriented to a thickness direction of the belt ply. The topping rubber has a complex elastic modulus (E*) of from 7 MPa to 20 MPa under a condition of temperature of 70° C., initial strain of 10%, an amplitude of dynamic strain of ±1.0%, and a frequency of 10 Hz.

Abstract: Provided are a rubber composition for tires that shows a balanced improvement in properties such as fuel economy, processability, heat aging resistance, abrasion resistance, wet-grip performance, performance on snow and ice, and handling stability, and a pneumatic tire formed from the rubber composition.

Abstract: A rubber composition comprising silica that has a BET specific surface area of not more than 130 m2/g and hardness of granulated particles as measured based on JIS K6221-1982 6.3.3 of not less than 23.5 cN can provide a rubber composition which is excellent in rubber physical properties while maintaining energy efficiency. A tire comprising a component consisted of the rubber composition can be also provided.

Abstract: Provided are a rubber composition for tires that shows a balanced improvement in properties such as fuel economy, processability, heat aging resistance, abrasion resistance, wet-grip performance, performance on snow and ice, and handling stability, and a pneumatic tire formed from the rubber composition.

Abstract: The present invention provides a rubber composition for a tire, which improves in fuel economy, wet grip performance, and abrasion resistance; and a pneumatic tire using the same. The present invention relates to a rubber composition for a tire, including: a rubber component including a modified styrene butadiene rubber that contains a constitutional unit derived from a specific nitrogen-containing compound in a main chain; silica; and a specific silane coupling agent.

Abstract: The present invention provides a rubber composition for a tire, which results in both excellent fuel economy and high wet grip performance as well as good abrasion resistance; and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition for a tire, the rubber composition containing a modified styrene butadiene rubber formed using a specific nitrogen-containing compound as a monomer, silica, and a specific amount of a diene rubber gel.

Abstract: The present invention provides a rubber composition for a tire which can achieve both high levels of fuel economy and abrasion resistance, as well as excellent wet grip performance; and a pneumatic tire produced using the rubber composition. The rubber composition for a tire includes a rubber component that includes 5% by mass or more of a modified styrene butadiene rubber containing a constitutional unit derived from a specific nitrogen-containing compound in a main chain, based on 100% by mass of the rubber component; silica; and a compound represented by the following formula (I): R20—S—S-A-S—S—R21 ??(I) wherein A represents a C2 to C10 alkylene group, and R20 and R21 are the same as or different from each other, each representing a monovalent organic group that contains a nitrogen atom.

Abstract: Disclosed is a conductive elastomer material from which a molded material having good conductivity and excellent bending resistance can be obtained. This conductive elastomer material is capable of reducing variations in in-plane electrical resistively of sheet-like molded articles. Specifically disclosed is a conductive elastomer material which is characterized by being obtained by dispersing carbon nanotubes into a base component which is composed only of a thermoplastic elastomer. The conductive elastomer material is also characterized in that the carbon nanotubes have a diameter of 30-300 nm and an aspect ratio of 10-1000, and 0.01-10 parts by mass of the carbon nanotubes are blended per 100 parts by mass of the base component.

Abstract: A conductive thermoplastic elastomer composition including a continuous phase and first and second uncontinuous phases. The continuous phase and the first and second uncontinuous phases form a sea-island structure; and the first and second uncontinuous phases independently forming island structures. In this structure, the continuous phase contains a composition which is a mixture of a thermoplastic elastomer and a thermoplastic resin; the first continuous phase contains a rubber component (B) containing at least one of diene rubber and ethylene-propylene-diene rubber; and the second continuous phase contains an ethylene oxide-propylene oxide-allyl glycidyl ether copolymer containing an anion-containing salt having a fluoro group and a sulfonyl group (component (C)).

Abstract: Disclosed is a conductive elastomer material from which a molded material having good conductivity and excellent bending resistance can be obtained. This conductive elastomer material is capable of reducing variations in in-plane electrical resistively of sheet-like molded articles. Specifically disclosed is a conductive elastomer material which is characterized by being obtained by dispersing carbon nanotubes into a base component which is composed only of a thermoplastic elastomer. The conductive elastomer material is also characterized in that the carbon nanotubes have a diameter of 30-300 nm and an aspect ratio of 10-1000, and 0.01-10 parts by mass of the carbon nanotubes are blended per 100 parts by mass of the base component.

Abstract: A conductive roller including a plurality of protrusion and a plurality of recessed grooves is manufactured by cylindrically extrusion-molding a thermoplastic elastomer composition that includes an elastomer composition a salt of an anion having a fluoro group and a sulfonyl group and lithium; an ethylene oxide-propylene oxide-allyl glycidyl ether copolymer; at least one material selected from the group consisting of an ethylene-acrylic ester-maleic anhydride copolymer and an ethylene-acrylic ester-glycidyl methacrylate copolymer; and not less than 1.5 parts by mass and not more than 16 parts by mass of acrylic-modified polytetrafluoroethylene with respect to 100 parts by mass of the rubber content. The difference in elevation between the highest points of the protrusions and the lowest points of the recessed grooves is not less than 100 ?m, and the pitch between the highest points of the protrusions adjacent to one another in the peripheral direction is not more than 800 ?m.

Abstract: A rubber component containing at least one of diene rubber and ethylene-propylene-diene rubber is dynamically crosslinked. Thereby the rubber component is dispersed in a mixture of a thermoplastic elastomer and a thermoplastic resin. An ethylene oxide-propylene oxide-allyl glycidyl ether and an anion-containing salt having fluoro groups and sulfonyl groups are added to the elastomer composition to obtain a conductive dynamically crosslinked thermoplastic elastomer composition. A mixture of the obtained conductive dynamically crosslinked thermoplastic elastomer composition and a micro-capsule composed of a polymer, having acrylic groups, which forms an outer shell thereof is molded to obtain a conductive roller having Shore A hardness specified in JIS K6253 not more than 40 measured at 23° C.

Abstract: A conductive thermoplastic elastomer composition including a continuous phase and first and second uncontinuous phases. The continuous phase and the first and second uncontinuous phases form a sea-island structure; and the first and second uncontinuous phases independently forming island structures. In this structure, the continuous phase contains a composition (A) which is a mixture of a thermoplastic elastomer and a thermoplastic resin; the first continuous phase contains a rubber component (B) containing at least one of diene rubber and ethylene-propylene-diene rubber; and the second continuous phase contains an ethylene oxide-propylene oxide-allyl glycidyl ether copolymer containing an anion-containing salt having a fluoro group and a sulfonyl group (component (C)).

Abstract: A rubber roller, for use in an image-forming apparatus, which is formed by molding a rubber composition into the shape of a roller. In the rubber roller, a complex elastic modulus E* of rubber and a surface roughness Rz of the rubber roller satisfy a relationship indicated by an equation (1) shown below; and a hardness change of the rubber is set to not more than five points when the rubber ages at 70° C. for eight days: 7×Ln E*?0.12×Rz+3.0?10.

Abstract: A rubber component containing at least one of diene rubber and ethylene-propylene-diene rubber is dynamically crosslinked. Thereby the rubber component is dispersed in a mixture of a thermoplastic elastomer and a thermoplastic resin. An ethylene oxide-propylene oxide-allyl glycidyl ether and an anion-containing salt having fluoro groups and sulfonyl groups are added to the elastomer composition to obtain a conductive dynamically crosslinked thermoplastic elastomer composition. A mixture of the obtained conductive dynamically crosslinked thermoplastic elastomer composition and a micro-capsule composed of a polymer, having acrylic groups, which forms an outer shell thereof is molded to obtain a conductive roller having Shore A hardness specified in JIS K6253 not more than 40 measured at 23° C.

Abstract: A rubber roller, for use in an image-forming apparatus, which is formed by molding a rubber composition into the shape of a roller. In the rubber roller, a complex elastic modulus E* of rubber and a surface roughness Rz of the rubber roller satisfy a relationship indicated by an equation (1) shown below; and a hardness change of the rubber is set to not more than five points when the rubber ages at 70° C. for eight days: 7×Ln E*?0.12×Rz+3.0?10 .

Abstract: An elastomer composition containing 2 to 150 parts by mass of a mixture of a thermoplastic elastomer and a thermoplastic resin, 50 to 250 parts by mass of a softener, and 0.2 to 3.0 parts by mass of an organic peroxide serving as a crosslinking agent, and 2 to 20 parts by mass of a resin crosslinking agent with respect to 100 parts by mass of a rubber component containing diene rubber and/or ethylene-propylene-diene rubber. The rubber component is dynamically crosslinked to disperse the rubber component in the mixture of the thermoplastic elastomer and the thermoplastic resin.

Abstract: A rubber composition which can improve performance on icy and snowy road sufficiently and a tire using the same. The rubber composition comprises 2 to 30 parts by weight of staple fibers having an average fiber diameter of 10 to 100 ?m and an average fiber length of 0.01 to 4 mm, and 1 to 10 parts by weight of particles having a Moh's hardness of at least 5 and an average particle size of at most 500 ?m based on 100 parts by weight of a diene rubber. The tire of the present invention is prepared by using the rubber composition for tread. Examples of the particle are pumice, quarts, emery and the like.

Abstract: A rubber composition for a tire improving friction performance on ice and a pneumatic tire comprising the same are provided. A rubber composition for a tire comprising 0.5 to 20 parts by weight of a nonmetallic fiber having an average fiber diameter of 1 to 100 ?m and an average fiber length of 0.1 to 5 mm, and 0.5 to 30 parts by weight of a filler having at least 2 projections and an average length of the projections of at least 10 ?m based on 100 parts by weight of a diene rubber, and a pneumatic tire comprising the same.