| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a toner not causing offsetting phenomenon and winding around a heat roll at the time of fixation, fixable at a low temp., hardly causing filming during development and having satisfactory transferability by specifying the rate of spreading of a toner after melting in the horizontal direction of the surface of a transfer material. SOLUTION: This toner in a powdery state on a transfer material spreads after melting in the horizontal direction of the surface of the transfer material at >=1.2μm<2> /μm<2> /10msec rate at a nip part between a heated fixing roll and a pressing roll. The rate of spreading in the perpendicular direction is preferably >=1.7μm<2> /μm<2> /10msec. The pressure of the fixing roll is preferably 2-30kgf/cm<2> when the toner is deformed by melting. This toner preferably contains a copolymer obtd. by polymerizing at least stearyl acrylate and butanediol dimethacrylate as comonomers.</p> |
