| 摘要 |
PURPOSE:To eliminate adverse effect due to filming of a developer and to stably form an image for a long time by heat treating fine polyvinylidene fluoride particles and attaching them to the surfaces of tone mother particles comprising a styrene-acrylic resin. CONSTITUTION:The fine polyvinylidene fluoride particles are heat-treated and attached to the surfaces of the toner mother particles comprising the styrene- acrylic resin having a number average molecular weight Mn of 200 - 6,000 and an Mw/Mn ratio of 2 - 4, where Mw is a weight average molecular weight, thus permitting the developer remaining on the surface of the photosensitive body not to be crushed and formed into films at the time of being pressed with a cleaning blade and the like, and stable beautiful images to be formed for a long period. |
