| 摘要 |
PURPOSE:To speed up fixing and to prevent caking during storage by depositing an inorg. material on the outermost layer of a toner. CONSTITUTION:The inorg. material is deposited on the outermost layer of the toner having multi-layered structure. For example, the nucleus toner is dispersed into an aq. soln. of an inorg. salt (e.g.: K2CO3) in the presence of a surfactant and thereafter, said soln. is dispersed into an org. solvent (e.g.: benzene) contg. the surfactant and the soln. is emulsified by stirring. The resultant emulsion is mixed under stirring with an aq. soln. of an inorg. salt (e.g.: CaCl2) and is then filtered and dried. The toner formed with the walls of the inorg. material (e.g.: CaCO3) is then obtd. The inorg. material is stuck to the outermost layer in the stable state according to this constitution and, therefore, the efficient fixing is executed at a high speed; in addition, the caking during storage is prevented. |
