| 摘要 |
PURPOSE:To enable low temp. fixing and to make the device simple and small in size by using a specified toner for a toner image which is simultaneously transferred and fixed on a preheated recording medium. CONSTITUTION:A toner image formed on an electrostatic latent image is simultaneously transferred and fixed on a preheated recording medium. The toner used is a capsule toner comprising a shell and core material which melts by heat and contains a colorant. The shell essentially consists of such a resin obtd. by the reaction of the following compds. They are univalent isocyanate compds.(A) by 0-30mol% of the total isocyanate compds and bivalent or higher valent isocyanate compds.(B) by 100-70mol% of the total isocyanate compds, compds. (C) having one active hydrogen which reacts with an isocyanate group by 0-30mol% of the total amt. of compds. which react with isocyanate groups, and compds. (D) having two or more hydrogen atoms by 100-70mol% of the compds. which react with isocyanate groups. These components are used by 1:1-1:20 ratio of (A+B):(C+D). Moreover, in couplings relating to all of isocyanate groups of the resin, >=30% in their number are couplings which dissociate by heat. |
