Carbon powder and production method thereof

Abstract

The invention provides carbon powder. The carbon powder is prepared from the following components in parts by mass: 85-95 parts of bonding resin, 2-8 parts of a coloring agent, 0.1-5 parts of an electric charge control agent, 1-6 parts of de-molding agent and 1-10 parts of a magnetic material. A magnetic material is successfully used in non-magnetic powder, and the related properties of the magnetic material, such as high rigidity, large density and strong dispersity can be utilized, so that the defects of the carbon powder in a developing and photographic fixing process are improved. The effects of the carbon powder are mainly represented in the following two aspects: firstly, the magnetic material is added so that the density of carbon powder particles becomes large, and a powder flying problem in a high-speed printing material can be improved; secondly, the magnetic material is oxide of iron so that the specific resistance of the carbon powder particles can be reduced by the magnetic material, and furthermore, the electric charge uniformity of each carbon powder particle is better and the stability is better; and the problem of shallow color at the later period is well solved.

Description

technical field [0001] The invention belongs to the field of consumables for imaging and developing equipment, and in particular relates to carbon powder modified by magnetic materials and a manufacturing method of the carbon powder. Background technique [0002] In the electrophotographic process and the electrostatic recording process, an electrostatic latent image is formed by performing an exposure process on a uniformly charged photoreceptor, toner is attached to the electrostatic shallow image to form a toner image, and then the toner is The agent image is transferred to a transfer member (usually paper). Subsequently, the transferred toner image is fixed to paper using various methods such as a heating process, a pressing process, or a solvent evaporation process. Generally, in the fusing process, paper with a toner image passes between a fusing roller and a pressure roller, and then, by heating and pressing, the toner is melted and penetrated into the paper to form ...

AI Technical Summary

Problems solved by technology

The second step is the development process. The carbon powder is attached to the organic photosensitive conductor (OPC) through the potential difference from the surface of the developing roller to form an electrostatic latent image. During this process, the position on the OPC where the electrostatic latent image is not formed also contacts the carbon powder. The charging roller will also contact the toner, and the toner will appear in the place where the electrostatic latent image is not formed on the OPC, which will cause the bottom dust defect, that is, the problem that the blank space on the printed proof is not clean

The third step is the transfer process. Part of the toner is attached to the paper from the surface of the OPC through the potential difference, and part of it enters the waste toner bin through the waste toner scraper. During this process, the toner contacts the OPC, the charging roller, and the waste toner scraper. If the OPC If the amount of toner attached to the paper is too small, it will lead to problems such as low transfer rate, low page output, waste toner explosion, contamination of the charging roller, etc., and may even cause ghosting. If the toner adheres to the If the OPC surface cannot be peeled off, it will cause sticking and drumming

Therefore, for the existing carbon powder, the electrical properties of the carbon powder need to be improved