| 摘要 |
PURPOSE:To obtain images which are stable in triboelectrostatic charge quantity and are extremely little in ground fogging in continuous copying of many sheets by mixing fluoroplastic resin powder at a specific ratio with the fine particles of the toner and fixing the particles and the powder by imparting compressive force and friction force thereto. CONSTITUTION:A binder resin, coloring agents and other additives to be added at need are mixed at desired compounding ratios and after the mixture is melted and kneaded, the mixture is ground and classified to form the fine particles of the toner having 5 to 15mum average particle size. The fluoroplastic resin powder is then mixed at 0.01 to 5pts.wt. with 100pts.wt. fine particles of the toner. The fluoroplastic resin powder is fixed to the surfaces of the fine particles of the toner by imparting the compressive force and friction force to the fine particles of the toner and the fluoroplastic resin powder. The fluoroplastic resin powder is securely fixed to the surfaces of the fine particles of the toner in this way and the triboelectrostatic charge quantity is stabilized in continuous copying of many sheets. The images free from the ground fogging are thus obtd. |
