| 摘要 |
<p>PURPOSE:To produce the toner with good productivity by further pulverizing the powder obtd. by subjecting toner raw material to melt kneading, solidifying by cooling and prepulverizing, in the presence of a refrigerant. CONSTITUTION:The constituting components of the electrostatic charge image developing toner raw materials are previously weighted a mixed and are supplied from a raw material supply machine to a kneading machine. A binder resin is heated to melt and is kneaded in a molten state in a kneading machine. The kneaded matter is then sent to a cooler where the kneaded matter is cooled down to a temp. at which the pulverization is possible. The kneaded matter is then prepulverized by a prepulverizing machine. The prepulverized particles obtd. in such a manner are pulverized in the presence of the refrigerant, by which the coarse particles, the particles of prescribed sizes and the microparticles are formed. These particles are sent to a classifying machine where the particles are classified to a mixture composed of the coarse particles and the mixture composed of the particles of the prescribed grain sizes and the microparticles. The coarse particles are subjected together with the prepulverized particles to pulverization. The prescribed particles and the microparticles are further classified.</p> |
