Charging roller and preparation method thereof

Abstract

The invention relates to the field of static sub-images and discloses a charging roller and a preparation method thereof. The charging roller comprises a metal axis and conductive rubber arranged outside the metal axis in a sleeved manner, wherein a film sleeve is arranged outside the conductive rubber in a sleeved manner; the conductive rubber is prepared from a segment-A material and a segment-B material which are in a weight ratio of 100:(9-11); the segment-A material is ethylene propylene rubber in which conductive carbon black is mixed, and the weight ratio of the conductive carbon black to the ethylene propylene rubber is (32-40):100; the segment-B material is a foaming agent in which a sulfurizing agent is mixed, and the weight ratio of the sulfurizing agent to the foaming agent is (20-25):100. According to the invention, the conductive rubber foams in the film sleeve in a sulfurizing process and tightly clings to the film sleeve, so that the conductive rubber and the film sleeve are not loose in a printing process and the printing quality is not influenced; the film sleeve is additionally arranged outside the conductive rubber, so that the surface of the charging roller is smooth, a spraying link is not needed, and environment pollution and personnel injury are also avoided.

Description

technical field [0001] The invention relates to the technical field of electrostatic latent images, in particular to a charging roller suitable for the fields of printers, copiers and facsimile machines and a preparation method thereof. Background technique [0002] Charging rollers are widely used in the fields of printers, copiers, and fax machines. Printers, copiers, and fax machines charge and expose the photosensitive drum through the charging roller to form an electrostatic latent image, and then transfer the toner to the electrostatic latent image on the photosensitive drum through the developing roller. , the toner latent image is transferred to the paper for heating and setting to form the final printed text image. The existing charging roller generally includes a metal shaft and a conductive rubber sheathed on the outside of the metal shaft. [0003] At present, the charging roller inside the toner cartridge of a general printer is a hard rubber roller, that is, t...

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Problems solved by technology

[0003] At present, the charging roller inside the toner cartridge of a general printer is a hard rubber roller, that is, the inside is an iron shaft, and the outside is wrapped with dense conductive rubber. Since the rubber layer outside the metal shaft is hard, in order to improve the printing effect, it is necessary to After the metal shaft and conductive rubber layer are formed, the spraying process is carried out to improve the smoothness and flatness of the surface of the charging roller. Therefore, the production steps of the original factory are generally: rubber mixing→iron shaft and rubber compound extrusion→vulcanization→cutting→ Grinding→rinsing rubber roller→spraying→packaging, because the spraying link is added in the production process, it is very harmful to the environment and human body

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