| 摘要 |
PROBLEM TO BE SOLVED: To enable high-speed fixing to cope with high-speed printing, and to obtain a high-quality and high-stability image less liable to cause hot offset. SOLUTION: An image forming apparatus is equipped with an image carrier 3, an electrostatic latent image forming means 5 which forms an electrostatic latent image on the image carrier, a developing means 6 which develops the electrostatic latent image to form a toner image T, a transfer fixing member 13 which carries the toner image, a heating means 15 which heats the toner image on the transfer fixing member, and a pressurizing member 14 which forms a transfer fixing nip N with the transfer fixing member. Then the toner image on the transfer fixing member is transferred and fixed simultaneously onto a recording medium P which passes through the transfer fixing nip. At this time, the nip time is set to≤30 ms, the toner contains a binder, the binder has a main peak in an area of 5,000-15,000 molecular weight in a molecular weight distribution measured by GPC, the component of≥30,000 molecular weight is≤0.05% and the value of weight-average molecular weight (Mw)/number average molecular weight (Mn) is 2-6. COPYRIGHT: (C)2008,JPO&INPIT
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