Developing roller and imaging apparatus using the same

Abstract

This invention provides a development roller and an image forming apparatus using the same, which can eliminate the need to provide a drying line in the process of forming a resin layer and can use a carbon-based electrically conductive agent in the resin layer for imparting electrical conductivity to the resin layer. A development roller (1) comprises a shaft member (2) formed of a metallic pipe and a resin layer (4). The resin layer (4) is formed of an ultraviolet curing resin comprising a carbon-based electrically conductive agent and an ultraviolet light polymerization initiator. The maximum wavelength in an ultraviolet absorption wavelength band of the ultraviolet polymerization initiator is not less than 400 nm. The resin layer (4) may be formed of an electrically conductive agent-containing electron beam curing resin.

Description

technical field [0001] The present invention relates to a developing roller used in electrophotographic devices such as copiers and printers, or image forming devices such as electrostatic recording devices, and an image forming device using the developing roller. Background technique [0002] In electrophotographic image forming apparatuses such as copiers and printers, a non-magnetic developer (toner) is supplied to a latent image holder such as a photosensitive drum holding a latent image, and the toner adheres to the latent image of the latent image holder And make the latent image visible, as the general example of this developing method, there is the non-magnetic jump developing method as follows: on the outer periphery of the developing roller that is provided with the latent image holder with a small gap and arranged, the charged toner is carried, The developing roller is rotated in a state where a voltage is applied between the latent image holder and the developing...

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Problems solved by technology

[0012] However, even if an ultraviolet curable resin containing carbon-based conductive agent is to be cured by ultraviolet rays after coating, since carbon is opaque, it will also absorb ultraviolet rays, and it is difficult for ultraviolet rays to reach deep into the layer. Possibility that it cannot be performed sufficiently, therefore, there is a problem that carbon-based substances cannot be used as a conductive agent

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