摘要:
A process for producing a toner has the steps of, polymerizing a polymerizable monomer composition containing at least a polymerizable monomer and a colorant, in an aqueous dispersion medium to form colored polymer particles, and thereafter washing the colored polymer particles, followed by dewatering to prepare wet colored polymer particles, subjecting the resultant wet colored polymer particles to substantial removal of the water held by the wet colored polymer particles, by means of a dryer making use of hot air to obtain toner particles, and drying the toner particles under reduced pressure by means of a vacuum dryer so that polymerizable monomers remaining in the toner particles come to be in a residue of 200 ppm or less.
摘要:
A toner for producing electrostatic latent images is produced by classifying a pulverized feed material into a coarse powder and a fine powder in a first classifying means, pulverizing and recycling the coarse powder to the first classifying means, introducing the fine powder into a multi-division classifying chamber divided into at least three sections where the fine powder is classified into at least a coarse powder fraction, a medium powder fraction and a fine powder fraction. The medium powder fraction is recovered to provide a toner. The coarse powder fraction is recycled to the first classifying means.
摘要:
A gas current toner classifier has a material feed nozzle, a Coanda block, a classifying wedge and a classifying wedge block having the classifying wedge. The Coanda block and the classifying wedge define a classification zone, and the classifying wedge block is set up in the manner that its location is changeable so that the form of the classification zone can be changed. A method of producing toner using said classifier is also described.
摘要:
A pneumatic pulverizer comprises an acceleration pipe for transporting powders under acceleration by a high pressure gas, a pulverization chamber, a collision member for pulverizing the powders ejected from the acceleration pipe by a force of collision, the collision member being provided against the outlet of the acceleration pipe, a raw material powder supply inlet provided on the acceleration pipe, and a secondary air inlet provided between the raw material powder supply inlet and the outlet of the acceleration pipe.
摘要:
A pneumatic pulverizer comprises an acceleration pipe for transporting powders under acceleration by a high pressure gas, a pulverization chamber, a collision member for pulverizing the powders ejected from the acceleration pipe by a force of collision, the collision member being provided against the outlet of the acceleration pipe, a raw material powder supply inlet provided on the acceleration pipe, and a secondary air inlet provided between the raw material powder supply inlet and the outlet of the acceleration pipe.
摘要:
A toner for developing an electrostatic latent image is produced by classifying a pulverized feed material in a first classifying means into coarse powder and fine powder; pulverizing the coarse powder and feeding back the pulverized product to the first classifying means; introducing the fine powder to a second classifying means having a multi-division classification zone divided into at least three sections, where it is classified into a coarse powder portion, a median powder portion, and a fine powder portion; and feeding back the coarse powder to said pulverizing means or first classifying means. The median powder has a volume average particle diameter of from 4 .mu.m to 10 .mu.m and a coefficient of variation of number distribution, represented by A, satisfying the following condition: 20.ltoreq.A.ltoreq.45, and the weights B, C, F, G and M are controlled to satisfy the expressions: 0.3 .ltoreq.weight B/weight C.ltoreq.0.8, 0.2.ltoreq.weight G/weight C.ltoreq.0.7 and 0.8.ltoreq.weight B/(weight F+weight M).ltoreq.1.2.
摘要:
A separator for classifying powder with air current, comprises a powder feed pipe and a classifying chamber, provided in said separator; a guide chamber provided at the upper part of said classifying chamber to communicate with said powder feed pipe; a plurality of introducing louvers provided between said guide chamber and said classifying chamber, at which the powder is flowed in from said guide chamber to said classifying chamber through the openings between said introducing louvers together with carrying air; an inclined classifying plate raised at its central part, provided at the bottom of said classifying chamber; classifying louvers provided along the side wall of said classifying chamber, through the openings of which the air is flowed to produce a whirling stream by which said powder fed into said classifying chamber together with carrying air is centrifugally separated into fine powder and coarse powder; a discharge opening provide at the central part of said classifying plate and from which the classified fine powder is discharged; a fine powder discharge chute connected to said discharge opening; and a discharge opening formed along the periphery of said classifying plate and from which the classified coarse powder is discharged.
摘要:
A process for classifying toner particles supplied through a supply nozzle into at least three fractions in a classifying chamber divided into at least three sections and placed under a reduced pressure under the action of the inertia force of the toner particles supplied together with a gas stream and the centrifugal force of the curved gas stream due to Coanda effect. A first gas introduction pipe and a second gas introduction pipe are disposed above the classifying chamber so as to provide a first inlet and a second inlet opening with the first inlet being disposed closer to the supply nozzle than the second inlet. The absolute values of the static pressures P.sub.1 and P.sub.2 in the first and second gas introduction pipes are controlled so as to satisfy the relations of: .vertline.P.sub.1 .vertline..gtoreq.150 mm.aq., .vertline.P.sub.2 .vertline..gtoreq.40 mm.aq. and .vertline.P.sub.1 .vertline.-.vertline.P.sub.2 .vertline..gtoreq.100 mm.aq.
摘要翻译:将通过供给喷嘴供给的调色剂颗粒分级成至少三个部分的方法,分级室分为至少三个部分,并在与气流一起供应的调色剂颗粒的惯性力作用下放置在减压下, 由于柯达效应导致的弯曲气流的离心力。 第一气体导入管和第二气体引入管设置在分级室的上方,以便提供第一入口和第二入口,第一入口设置成比第二入口更靠近供给嘴。 控制第一和第二气体导入管中的静压力P1和P2的绝对值,以满足以下关系:| | | | | = = 150mm.aq.,| P 2 |> = 40mm.aq 。 和| P 1 | - | P 2 |> = 100mm.aq
摘要:
A gas current classifier has a material feed nozzle, a Coanda block, a classifying wedge and a classifying wedge block having the classifying wedge. The Coanda block and the classifying wedge define a classification zone, and the classifying wedge block is set up in the manner that its location is changeable so that the form of the classification zone can be changed.
摘要:
A separator for classifying powder with air current comprises at least a classifying chamber and an introducing section for introducing powder into the classifying chamber, a powder feeding inlet for feeding powder formed at the upper portion of the classifying chamber, a cone-shaped classifying plate with a high central portion formed at the lower portion of the classifying chamber, a coarse powder discharging outlet for discharging coarse powder provided at the lower brim outer periphery of the classifying plate, a fine powder discharging outlet for discharging fine powder provided at the central portion of the classifying plate, a gas inflower for dispersing powder by whirling gas provided at the upper outer periphery of the classifying chamber, and a gas inflow inlet for creating a whirling current of gas for classifying powder provided at the lower portion of the classifying chamber.