A kind of magnetic single-component toner and its preparation method

Abstract

The invention discloses magnetic one-component powdered ink and a preparation method thereof. The magnetic one-component powdered ink comprises the following components: 0.5-5 parts of a salicylic acid metal complex charge control agent, 0.5-5 parts of an azo metal complex charge control agent, 45-65 parts of resin, 35-60 parts of a coloring agent, 1-10 parts of a release agent and 0.5-2 parts of hydrophobic silicon. The preparation method comprises the following steps: 1) mixing raw materials to obtain mixture; 2) putting the mixture into an extruding machine to be extruded, so that extrudate is obtained; 3) smashing the extrudate into coarse crushed aggregates, and then further smashing the coarse crushed aggregates into a powder semi-finished product; and 4) adding hydrophobic silicon into the powder semi-finished product, and mixing, so that the magnetic one-component powdered ink is obtained. The powdered ink has the characteristics of stable charge distribution, stable image density and no handwriting burr.

Description

technical field [0001] The invention relates to a magnetic single-component toner and a preparation method thereof, belonging to the technical field of printing. Background technique [0002] Laser printing has been popularized to families in the market. The printing process includes: 1. Charging: so when printing starts, the photosensitive drum is first initialized, that is, the outer surface of the drum is evenly charged with a negative charge. 2. Exposure: When the printer starts to print, the laser generator generates a laser beam, which is reflected onto the photosensitive drum through the scanning mirror, so that the photosensitive layer of the part irradiated by light (that is, exposure) becomes a conductor, and the negative charge on its surface Discharge to the ground (the degree of discharge is determined by the exposure intensity), at this time, an electrostatic latent image with different potentials is formed on the photosensitive drum surface. 3. Developing (i...

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Problems solved by technology

[0003] In this process, the performance of the toner is very strict. In the prior art, the electrification ability of the toner is insufficient, which will lead to insufficient charging of the toner, or the extreme charge will cause the charge of the toner to be uneven, or make the carbon powder The powder cannot be fully charged, and there are abnormal phenomena such as low density and burrs. Therefore, in the field of laser printing, it is required that the toner can be charged at a high speed in a short time and maintain a stable and excellent charging ability.

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