| 摘要 |
PURPOSE:To obtain an economical toner superior in fluidity and triboelectrification characteristics by mixing thermoplastic resin core particles having an average particle diameter of 1-15mum, with a colorant alone, or together with other necessary fine additives, and applying mechanical stress in such conditions as forming an average particle diameter of 1-20mum. CONSTITUTION:The thermoplastic resin core particles having an average particle diameter of 1-15mum are mixed with the colorant alone, or together with other necessary fine additives, and subjected to mechanical stress in such conditions as forming an average particle diameter of 1-20mum, while care is taken lest the resin core particles be melted and attached to each other to form coase agglomerates, or be too finely pulverized by too strong stress, but it is necessary that the colorant powder is attached to the surface of each resin particle and buried into the surface in a state of primary fine particles. It is preferred to control the toner particle size to the range of average particle diameter of 1-20mum and to substantially eliminate the toner particles of <=0.5mum and >=25mum diameters. |
