Abstract: A urethane foam-molded article has a base material made of polyurethane foam and composite particles that are included and oriented in the base material. The composite particles have thermally conductive particles that are made of a non-magnetic material and have a thermal conductivity of 200 W/m·K or higher and magnetic particles attached to the surfaces of the thermally conductive particles with a binder and are surface-treated with one or more surfactants selected from a carboxylic acid-type surfactant and a succinic acid-type surfactant.

Abstract: Provided is a paper feeding roll that prevents paper transportation failures over a long time. A paper feeding roll 10 is provided with an axial body 12 and an elastic layer 14 formed on an outer periphery of the axial body 12. The circumferential surface of the elastic layer 14 has a plurality of projections 16 forming surface unevenness. Each projection 16 of the plurality of projections 16 is shaped such that a position X of a distal-end part preceding in an opposite direction to a paper feeding direction precedes, in the opposite direction to the paper feeding direction, a position Y of a base-end part preceding in the opposite direction to the paper feeding direction.

Abstract: There is provided a conductive roller for electrophotographic equipment in which a shaft made of core metal has excellent rust resistance. The conductive roller includes a shaft made of core metal, a protective layer formed on the outer periphery of the shaft, and a conductive rubber elastic layer formed on the outer periphery of the protective layer. In a conductive roller for electrophotographic equipment, the conductive rubber elastic layer contains a rubber containing halogen atoms, and the protective layer is formed of a crosslinked material of a composition containing a material obtained by melting and mixing the following components (a) to (c): (a) a polyfunctional maleimide compound having two or more maleimide groups; (b) a benzoxazine compound; and (c) an epoxy resin.

Abstract: There is provided a conductive roller for electrophotographic equipment in which a shaft made of core metal has excellent rust resistance. The conductive roller includes a shaft made of core metal, a protective layer formed on the outer periphery of the shaft, and a conductive rubber elastic layer formed on the outer periphery of the protective layer. In a conductive roller for electrophotographic equipment, the conductive rubber elastic layer contains a rubber containing halogen atoms, and the protective layer is formed of a crosslinked material of a composition containing a material obtained by melting and mixing the following components (a) to (c): (a) a polyfunctional maleimide compound having two or more maleimide groups; (b) a benzoxazine compound; and (c) an epoxy resin.

Abstract: A paper feed roller that can prevent paper sheet transport failure caused by accumulation of paper powder for a long period of time is provide. This paper feed roller includes a shaft body and an elastic body layer formed on the outer periphery of the shaft body. Unevenness are formed by protrusions on the circumferential surface of the elastic body layer. The protrusions are arranged on the circumferential surface of the elastic body layer in a direction different from an axial direction. The gap between a row of protrusions which extends in the direction different from the axial direction and a row of protrusions which is parallel to the row of protrusions is a continuous recess, i.e., a groove, and the width of the groove is greater than the distance between the protrusions in the row of protrusions which extends in the direction different from the axial direction.