Making method of colored toner

Abstract

The invention discloses a making method of colored toner. The method comprises the steps of dissolving dye into an oil phase, then mixing the oil phase with a water phase, emulsifying by using a membrane emulsification apparatus under certain pressure, and adopting an emulsion polymerization method to obtain colored microspheres. The method solves the problems that the original 'mixed melting method' is complicated in process technology, high in requirements for raw materials, equipment and process conditions, high in energy consumption, and the like. The method also solves the problem that the common chemical method for preparing the toner is poor in process amplification stability. The colored microspheres prepared by the method are good in particle size uniformity, high in degree of sphericity, bright in color, glossy, high in resolution ratio, low in powder rejection rate, simple in technology and low in energy consumption, and do not need to be classified; after the colored microspheres are used, the colored toner with the needed particle size can be obtained at one time, and a series of performance tests such as particle size, sphericity, amount of charge and fixing temperature distribution can be carried out on the colored toner.

Description

technical field [0001] The invention relates to a preparation method of color toner for copying and printing. Background technique [0002] The traditional preparation method of color toner is the "melting method", that is, the resin, colorant and additive are mixed evenly and then mixed at high temperature, then extruded, cooled, crushed, ultra-finely pulverized, classified, and finally added some to change its flow. Grinding with permanent external additives to obtain color toner with a particle size of about 10 μm. This preparation method is complicated in process, high in energy consumption and high in cost. The particle size of the obtained product is large, the particle size distribution is wide, the shape of the particle is extremely irregular, and the distribution of each component is uneven, etc., which all affect the quality of the toner. print effect. In recent years, the research on the preparation of toner by direct polymerization has been fully developed. Po...

AI Technical Summary

Problems solved by technology

Although the suspension polymerization method has improved a lot compared with the original melting pulverization method, its energy consumption is reduced, but the particle size of the prepared colored particles is between 5 and 30 μm, and the prepared particle size distribution is still wide

And the particle size of the color toner prepared by the existing emulsion polymerization method is smaller

However, this method uses mechanical stirring to emulsify, so that the particle shape obtained after polymerization is still difficult to control

The resulting resin has poor compatibility with pigments, and the pigments are easy to fall off during printing, and the reaction process consumes a lot of energy and costs.