Abstract: The present invention provides a rubber composition for a hose, the rubber composition including acrylonitrile-butadiene rubber (NBR) as one rubber component, wherein the rubber composition for a hose is characterized in that said NBR component includes acrylonitrile-butadiene rubber having a weight-average molecular weight (Mw) of 280,000 or higher (specific high-molecular-weight NBR), said acrylonitrile-butadiene rubber (specific high-molecular-weight NBR) accounts for at least 60% by mass of the rubber component, and the acrylonitrile content included in the rubber component is 25-32% by mass. It is possible to provide a rubber composition that has improved toughness at high temperatures and exceptional heat resistance, oil resistance, and kink resistance, and that can be used especially suitably as the inner rubber of a hydraulic hose.

Abstract: Provided is a tire having at least a circular tire frame formed of a thermoplastic resin material, the tire including a reinforcing cord member that forms a reinforcing cord layer on the outer circumference of the tire frame, and the thermoplastic resin material including at least a polyamide-based thermoplastic elastomer.

Abstract: Provided is a tire having a circular tire frame formed of at least a thermoplastic resin material, in which the tire includes a reinforcing cord member that forms a reinforcing cord layer on an outer circumference of the tire frame, and the thermoplastic resin material contains at least a polyester-based thermoplastic elastomer.

Abstract: Provided is a tire having at least a circular tire frame formed of a thermoplastic resin material, the tire including a reinforcing cord member that forms a reinforcing cord layer on the outer circumference of the tire frame, and the thermoplastic resin material including at least a polyamide-based thermoplastic elastomer.

Abstract: Provided is a tire having a circular tire frame formed of at least a thermoplastic resin material, in which the tire includes a reinforcing cord member that forms a reinforcing cord layer on an outer circumference of the tire frame, and the thermoplastic resin material contains at least a polyester-based thermoplastic elastomer.

Abstract: The present invention relates to a pneumonic tire and a rubber composition used in the same, both of which are capable of preventing static charge build-up on a tire surface without degrading various tire performances such as rolling resistance and so on, and particularly to a rubber composition comprising 10 to 30 parts by mass of an ionic liquid and 5 to 95 parts by mass of silica per 100 parts by mass of a rubber component containing at least 50% by mass of styrene-butadiene rubber, as well as a pneumatic tire using such a rubber composition in a tread portion.

Abstract: Provided is a tire having at least a circular tire frame formed of a thermoplastic resin material, the tire including a reinforcing cord member that forms a reinforcing cord layer on the outer circumference of the tire frame, and the thermoplastic resin material including at least a polyamide-based thermoplastic elastomer.

Abstract: Provided is a tire having a circular tire frame formed of at least a thermoplastic resin material, in which the tire includes a reinforcing cord member that forms a reinforcing cord layer on an outer circumference of the tire frame, and the thermoplastic resin material contains at least a polyester-based thermoplastic elastomer.

Abstract: The present invention relates to a pneumonic tire and a rubber composition used in the same, both of which are capable of preventing static charge build-up on a tire surface without degrading various tire performances such as rolling resistance and so on, and particularly to a rubber composition comprising 10 to 30 parts by mass of an ionic liquid and 5 to 95 parts by mass of silica per 100 parts by mass of a rubber component containing at least 50% by mass of styrene-butadiene rubber, as well as a pneumatic tire using such a rubber composition in a tread portion.

Abstract: This invention provides a composite body, a catalyst structural body, an electrode for a solid polymer fuel cell and a method for producing the same and a solid polymer fuel cell. More concretely, there are provided (1) a composite body, a catalyst structural body and an electrode for a solid polymer fuel cell being excellent in the electronic conduction, permeability and handling property, (2) an electrode for a solid polymer fuel cell capable of highly expanding a reaction field of an electrochemical reaction at a three-phase interface of a solid polymer electrolyte membrane, a gas and a catalyst layer in a solid polymer fuel cell, and a method for producing the same, and (3) a solid polymer fuel cell being low in the internal resistance, wherein a voltage is preferable to be hardly lowered even in a high current range.

Abstract: An electrically conductive thermoplastic resin composition to which an electrically conductive agent is added, characterized in that a base resin for the resin composition contains a polyester resin. A resinous base-body for a photosensitive drum made of the above-mentioned electrically conductive resin composition and used in electrostatic recording processes including electro-photographic processes and the like. A photosensitive drum which is made up of the above-mentioned base-body and a photosensitive layer formed thereon. An electrically conductive resin composition which keeps a higher dimensional stability particularly under conditions of high temperature and high humidity without degrading mechanical strength, workability, etc., a base-body for a photosensitive drum using the resin composition, and a photosensitive drum using the base-body become obtainable.

Abstract: The invention relates to a method of producing carbon fibers characterized by oxidative-polymerizing a compound having an aromatic ring to obtain a fibril-shaped polymer and firing the fibril-shaped polymer in a non-oxidizing atmosphere, a novel catalyst structure using the carbon fibers obtained by this method, a membrane electrode assembly for a solid polymer fuel cell using the catalyst structure, and a solid polymer fuel cell provided with the membrane electrode assembly for the solid polymer fuel cell.

Abstract: A resin made base body in the form of a pipe has (1) a plurality of alternating projections and depressions which are provided on an outer peripheral surface of the pipe and aligned in substantially parallel rows in one of an axial direction and a circumferential direction of the pipe; (2) a specular gloss at 60° of a surface of the pipe in a range of 15 to 25; or (3) a skin layer formed in an outer peripheral portion in the thickness direction of a peripheral wall of the pipe, wherein an amount of the conductive agent present in the skin layer is equal to, or less than, one-tenth an amount of the conductive agent present in a central portion in the thickness direction of the peripheral wall of the pipe.

Abstract: A base-body for photosensitive drum comprising resin composition assembled to an image formation apparatus, wherein the base-body comprises a main frame, a flange portion with a thickness of from 0.1 mm to 5 mm and a gear at one end of the main frame integrally injection molded. According to the present invention, a base-body for photosensitive drum comprising a main frame, a flange portion and a gear both provided at one end of the main frame can be integrally molded by injection molding a resin composition without deformation of the gear in the timing of release from the mold. Therefore, a photosensitive drum provided from the base-body for photosensitive drum of the present invention is superior in rotational accuracy, driving transmission and has capability of forming a favorable image of high quality.

Abstract: The substrate for photosensitive drum of the invention for use in electrophotographic process is produced by ultrasonic-welding a resin-made flange or gear flange to an end portion of a cylindrical substrate made from an electroconductive resin composition prepared by dispersedly mixing an electroconductive material and a filler into a polymer matrix. The ultrasonic welding permits an efficient production of the substrate for photosensitive drum and ensures a high rotation accuracy of the substrate for photosensitive drum. With such a substrate for photosensitive drum, images with high quality can be formed.

Abstract: Disclosed herein are a mixed resin compound, a resin pipe, a process for producing said resin pipe, and a photosensitive drum. The resin compound meets at least one of the following requirements. It is a mixture of two or more kinds of resins blended in a specific manner, it undergoes annealing under specific conditions, and it has specific values of surface roughness, Vickers hardness, coefficient of linear expansion, flexural modulus, and thermal conductivity. The resin pipe is suitable for use as the cylindrical base of the photosensitive drum for electrophotographic machines, such as copying machines, facsimiles, and printers. It is superior in surface smoothness, dimensional stability, coatability, and handlability, and hence it is very little vulnerable to damage during handling and dimensional change due to resin shrinkage and is superior in heat resistance (desirable for solvent removal) and mechanical strength (desirable for flange fitting).

Abstract: The invention relates to a cylindrical resinous base-body for a photosensitive drum, and a photosensitive drum that includes the resinous base-body.

Abstract: The invention relates to a cylindrical resinous base-body for a photosensitive drum, and a photosensitive drum that includes the resinous base-body.

Abstract: Cylindrical base bodies for photosensitive drums according to first to fifth inventions are each formed by using a conductive resin composition containing a resin base material and a conductive agent dispersed in the resin base material. The base body of the first invention is characterized in that a dimensional accuracy is enhanced by using a mixture of a polyamide and a low water absorption resin as the conductive resin composition. The base body of the second invention is characterized in that a uniform and stable conductivity is obtained by using carbon black having a specific DBP oil absorption amount as the conductive agent. The base bodies of the third and fourth inventions are characterized in that a surface smoothness and a strength are enhanced by using a micro-spherical material or a flaked shape material, or a fibrous inorganic material having a specific fiber length and a specific fiber diameter as an inorganic filler for reinforcement added to the conductive resin composition.

Abstract: There are disclosed a composition for resin magnets which comprises a thermoplastic resin and magnetic powders and which, when determined in a heated molten state, has specific viscosity characteristics characterized in that the almost linear line which is obtained by taking &eegr;R/&eegr;O as ordinate and &ggr; as abscissa has a slope of at most 0.02, preferably at most 0.01 within a specific temperature range in which &eegr;O falls within the range of from 2.0×106 to 1.0×107 dyne/cm2, wherein &eegr;R denotes shear stress (dyne/cm2), &eegr;O denotes yield stress (dyne/cm2) and &ggr; denotes shear rate (S−1); a magnetic member which is produced by the use of the above composition for resin magnets; and a process for efficiently producing the magnetic member from the composition by an extrusion molding in a magnetic field under specific temperature and pressure conditions.