| 摘要 |
<p>PURPOSE:To inexpensively obtain an excellent electrostatic charge image developing toner with the picture density stabilized and enhanced, durable and without picture defects of fogging, defective cleaning, etc., and further to obtain the toner having a smaller grain diameter. CONSTITUTION:A binder resin and a composition contg. a colorant are melted, kneaded, then cooled and solidified, and the solidified material is crushed by the crushing means having a flash classifier and a collision-type flash crusher to produce the electrostatic charge image developing toner. In the flash classifier, the powder material supplied from a dispersing and flow-straightening pipe 14 having plural air feed nozzles through plural louvers 7 along with the carrier air is spiraled by the air current flowing in through a classifying louver 9 and centrifugally separated into fine powder and coarse powder, the fine powder is discharged from a discharge port 12 provided at the center of a classifying plate 10, and the coarse powder is discharged from a discharge port 11 formed at the outer periphery of the classifying plate, introduced into the collision-type flash crusher and crushed by the introduced secondary air.</p> |
