| 摘要 |
PURPOSE:To smooth the surface of the toner and to eliminate too fine particles by coating fine resin particles specified in particle diameter with a hydrophobic resin and exerting mechanical stress to melt the surfaces of the agglomerated particles. CONSTITUTION:The fine spherical resin particles (A) of <=10mu average particle diameter are coated with the hydrophobic resin (B) and agglomerated, and the surfaces of the agglomerates are heat melted by mechanical stress and smoothed, and the colorant and other necessary fine particles are contained in said the fine particles A or said resin B. This toner is prepared by producing the fine particles A by the emulsion polymerization method or the suspension polymerization method, when needed, attaching the colorant and the like to the surfaces of them, coating them with the resin B, thus forming the agglomerates of the toner particles, then, disintegrating the agglomerates and classifying them, applying the prescribed mechanical stress to heat melt the resin B, thus smoothing the surfaces of the agglomerates and eliminating the fine particles, and rendering them resistant to crushing. |
