Preparation method for positive non-magnetic toner

Abstract

The invention provides a preparation method for a positive non-magnetic toner. The positive non-magnetic toner comprises a toner master batch and an additive; the toner master batch comprises 100 parts by weight of styrene-acrylic resin, 3 parts by weight of release agent, 6 parts by weight of colorant and 3 parts by weight of electric charge control agent; the additive comprises 0.5 part by weight of small-size hydrophobic silicon dioxide in the grain size from 7 nanometers to 20 nanometers, 0.4 part by weight of large-size hydrophobic silicon dioxide in the grain size from 40 nanometers to 200 nanometers, 0.7 part by weight of barium titanate and 0.3 part by weight of polymethyl methacrylate. The preparation method comprises a premixing step and a post-mixing step. According to the invention, the raw material selection is matched with the mixing process, so as to prepare the positive non-magnetic toner in high printing quality.

Description

technical field [0001] The invention relates to a preparation method of a toner, in particular to a preparation method of a positive non-magnetic toner. Background technique [0002] Existing printers generally include two categories, laser printers and inkjet printers. Compared with inkjet printers, laser printers have the advantages of fast printing speed and low printing cost, so they are widely used in office places, especially in recent years. With the popularization of laser printing, the market of laser printing is getting bigger and bigger, while the original toner (usually also called toner) used in laser printers is often expensive, which limits the use of users. [0003] Compatible consumables produced by general-purpose consumables companies are favored by users because of their low prices. However, when researchers are developing the toner for the TN580 toner cartridge of the Brother Laser Printer HL-5240 printer, OPC ghosting, bottoming, etc. are prone to occur...

AI Technical Summary

Problems solved by technology

[0002] Existing printers generally include two categories, laser printers and inkjet printers. Compared with inkjet printers, laser printers have the advantages of fast printing speed and low printing cost, so they are widely used in office places, especially in recent years. With the popularity of laser printing, the market for laser printing is getting bigger and bigger, and the original toner (also called toner) used in laser printers is often expensive, which limits the use of users.

[0003] Compatible consumables produced by general-purpose consumables companies are favored by users because of their low prices. However, when researchers are developing the toner for the TN580 toner cartridge of the Brother Laser Printer HL-5240 printer, OPC ghosting, bottoming, etc. are prone to occur during the printing test. Problems such as dust and blackboard smearing, especially in the late stage of the life test, the developing roller has poor powder coating and serious blackboard smearing. It is difficult to completely solve the above problems only by adjusting the toner formula and changing the additives.

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