To meet different needs, toner production is developing in the direction of refinement, colorization and high speed. Toner manufacturing mainly uses crushing and polymerization methods:
The polymerization method is a fine chemical carbon powder technology, which includes (suspension polymerization, emulsion polymerization, microcapsule filling, dispersion polymerization, compression polymerization, chemical pulverization).
The polymerization method is completed in the liquid phase, which can produce carbon powder with a lower melting temperature, which can meet the requirements of modern technology for energy saving and environmental protection. By adjusting the amount of dispersant, the stirring speed, the polymerization time and the concentration of the solution, the particle size of the carbon powder particles is controlled to achieve uniform components, good color and high transparency. The carbon powder produced by the polymerization method has perfect particle shape, finer particle size, narrower particle size distribution, and better fluidity. It can meet the requirements of high-speed, high-resolution, color and other modern printing technologies.
Polymer toner technology has been around for years:
—The first patent for polymer toner appeared in 1972.
—Widely improved in the 1970s and 1980s.
—The first commercial monochrome toner appeared in 1993.
—The first commercial color toner appeared in 1998.
Process of polymerized toner:
(Resin monomer, pigment, dispersant, other reagents) → (ultrasonic dispersion) → (water, dispersant) → (full stirring) → (polymerization) → (washing) → (filtration separation) → (drying) → (after Processing) → (finished product)
Polymerized toner is widely used, and because of its high cost, it is mainly used in color toner production.
Because of its large investment, polymer toners generally cost several hundred million yuan. Only a few large international companies have production capacity: Japan's CANON, KONICA, MINOLTA, and FUJI-XEROX in the United States have production capacity, but the demand for color toner is lower than expected, and the major companies are currently not full. Load production.
2. Smashing method
The entire production process of the crushing method is:
(Material selection) → (Material inspection) → (Ingredients) → (Premix) → (Mixed extrusion) → (Crushing classification) → (Post-processing) → (Finished product) → (Inspection) → (Division)
The toner processing industry uses pulverization to make toner.
The pulverization method can produce toners suitable for dry electrostatic copying: including two-component toners and one-component toners (including magnetic and non-magnetic). Because of different development processes and belt motors, the proportions of their ingredients are also different.