Abstract: A conductive roller in which dripping of a water-based coating during the manufacture thereof is restrained, and a manufacturing method thereof. The conductive roller includes a shaft, at least one elastic layer formed on the outer periphery of the shaft and a surface layer formed on the outer peripheral surface of the elastic layer. The elastic layer is formed by using a coating for elastic layers containing a liquid absorbing agent, and the surface layer is formed by using a coating for surface layers. The method comprises forming an elastic layer by applying a coating for elastic layers containing a liquid absorbing agent on the outer periphery of the shaft and drying to form the elastic layer; and forming a surface layer by, after forming the elastic layer, applying a coating for surface layers on the formed elastic layer and drying to form the surface layer.

Abstract: Provided is a urethane resin composition by which an electrically conductive roller which has a higher elasticity than ever and in which an air bubble in an elastic layer is fine can be obtained when the urethane resin composition is used for the elastic layer of the electrically conductive roller, and an electrically conductive roller using the same. The urethane resin composition comprises: a urethane resin having a carboxyl group on a side chain; a cross-linking agent having an epoxy group; and an ester composed of a sugar and an unbranched saturated fatty acid having 16 to 24 carbon atoms as a foaming agent. The saturated fatty acid is preferably a stearic acid. The urethane resin composition preferably further contains a foaming auxiliary. The sugar is preferably a sucrose.

Abstract: Provided is an electrifying roller which may be used in a contact electrification method, which may be manufactured more easily, and which may better prevent problems caused by an electrically conductive material.

Abstract: Provided is a urethane resin composition by which an electrically conductive roller which has a higher elasticity than ever and in which an air bubble in an elastic layer is fine can be obtained when the urethane resin composition is used for the elastic layer of the electrically conductive roller, and an electrically conductive roller using the same. The urethane resin composition comprises: a urethane resin having a carboxyl group on a side chain; a cross-linking agent having an epoxy group; and an ester composed of a sugar and an unbranched saturated fatty acid having 16 to 24 carbon atoms as a foaming agent. The saturated fatty acid is preferably a stearic acid. The urethane resin composition preferably further contains a foaming auxiliary. The sugar is preferably a sucrose.

Abstract: Provided is an electrifying roller which is manufactured more easily, and has a good electrical conduction property with a small amount of electrically conductive material. Provided are electrifying rollers (10, 20) comprising a shaft 1, an elastic layer 2 formed on the periphery of the shaft 1, and a surface layer 3 formed on the periphery surface of the elastic layer 2, wherein the elastic layer 2 is formed by an ultraviolet curing resin having a phosphoester group. It is preferred that the ultraviolet curing resin be made of a compound represented by the following Formula (1): (wherein R1 is represented by the following Formula (2): (CH2)m??(2) (where m is an integer from 1 to 10), R2 is represented by any one of the following Formulae (3) to (9): R3 is represented by any one of the following Formulae (10) to (12): (where r, s and t are an integer from 10 to 150), and n is an integer from 1 to 10).

Abstract: Provided is a conductive roller in which dripping of a coating, in particular, a water-based coating during the manufacture thereof is restrained, and a manufacturing method thereof. Provided is a conductive roller including a shaft 1, at least one elastic layer 2 formed on the outer periphery of the shaft 1 and a surface layer 3 formed on the outer peripheral surface of the elastic layer 2. The elastic layer 2 is formed by using a coating for elastic layers containing a liquid absorbing agent, and the surface layer 3 is formed by using a coating for surface layers.

Abstract: Provided is an electrifying roller which is manufactured more easily, and has a good electrical conduction property with a small amount of electrically conductive material. Provided are electrifying rollers (10, 20) comprising a shaft 1, an elastic layer 2 formed on the periphery of the shaft 1, and a surface layer 3 formed on the periphery surface of the elastic layer 2, wherein the elastic layer 2 is formed by an ultraviolet curing resin having a phosphoester group. It is preferred that the ultraviolet curing resin be made of a compound represented by the following Formula (1): (wherein R1 is represented by the following Formula (2): ?CH2?m??(2) (where m is an integer from 1 to 10), R2 is represented by any one of the following Formulae (3) to (9): R3 is represented by any one of the following Formulae (10) to (12): (where r, s and t are an integer from 10 to 150), and n is an integer from 1 to 10).

Abstract: Provided is an electrifying roller which may be used in a contact electrification method, which may be manufactured more easily, and which may better prevent problems caused by an electrically conductive material. Provided is an electrifying roller (10), (20) of the present invention has a shaft (1), an elastic layer (2) formed on the periphery of the shaft (1), and a surface layer (3) formed on the periphery surface of the elastic layer (2), wherein the elastic layer (2) is formed by an ultraviolet curing resin, and the surface layer is formed by a heat curing resin. it is preferred that the thickness of said elastic layer (2) be 0.9 to 1.3 mm and that the shaft (1) be a hollow cylinder or solid cylinder made of metal.

Abstract: Provided are a method of manufacturing an electrifying roller in which a highly precise electrifying roller can be manufactured at a low cost and with more ease and an electrifying roller manufactured by the method.