| 摘要 |
PURPOSE:To obtain a toner which has excellent fixability at a low temp. and is free from blocking and offsetability, by dipping a toner for heat fixing contg. a COOH group-contg. resin as a main binder in an aq. soln. of metallic salts of bivalent or higher valency thereby reforming the surface thereof. CONSTITUTION:A toner contg. a COOH group-contg. resin such as a terpolymer of styrene-butadiene-acrylic acid or the like as a main binder is prepd. Such toner is dipped for a required time in an aq. soln. of metallic salts of bivalent or higher valency such as Al, Ca, Mg, Zn or the like at 20-40 deg.C under stirring. The toner is filtered, and is thoroughly rinsed and dried. The cross-linking with metal is thus generated among the COOH groups on the surface, whereby the aggregation between the toner particles is eliminated, the resistance to blocking and offsetability is improved and always the sharp picture image is obtd. |
