| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing toner by which substantially spherical toner particles can be readily manufactured. SOLUTION: A kneaded material obtained by heating, melting and kneading a toner composition comprising at least a binder resin and a colorant, and an aqueous medium containing water are put in a housing container 2 of a granulating device 1 and heated by a heater 13, while being stirred to disperse the kneaded material into a softened state in the aqueous medium. Here, a set granulation temperature T1, at which a loss tangent calculated by dividing the loss modulus G" of the kneaded material by the storage modulus G' reaches a preliminarily determined loss tangent of A, specifically in the range of 0.5 or larger but smaller than 5.0, is inputted to a granulation temperature input means 17. The granulation temperature which is the temperature of the aqueous medium measured with a thermometer 14, consequently, the temperature of the kneaded material in the aqueous medium is adjusted to the set granulation temperature T1 by controlling the operation of the heater 13 with a control means 15 so as to render the granulation temperature which is the temperature of the aqueous medium into the set granulation temperature T1 inputted by the input means 17. COPYRIGHT: (C)2008,JPO&INPIT
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