Toner, Developer, and process for producing the same

Details Toner, Developer, and process for producing the same Toner, Developer, and process for producing the same

1998-03-26

1999-12-21

Goodrow, John

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

G03G 900

Patent

active

060047135

ABSTRACT:
A process for preparing a toner includes forming a melt-kneaded mixture by mixing a raw material mixture containing a quaternary ammonium salt compound at a temperature ranging from (M-7).degree. C. to (M+7).degree. C., where M is a melting point of the quaternary ammonium salt compound, with a kneading device having a discharge port whose temperature is set lower than a temperature at which a melt viscosity of the melt-kneaded mixture at the discharge port is not higher than 10,000 Pa.a, removing the melt-kneaded mixture from the kneading device, rolling out the melt-kneaded mixture to a thickness ranging from 1.2 mm to 3.0 mm, and cooling down the melt-kneaded mixture. With the use of the toner produced by this process, the amount of charge during copying is retained in an appropriate range irrespectively of the working atmosphere and conditions of use, thereby maintaining a good image density.

REFERENCES:
patent: 5176978 (1993-01-01), Kumashiro et al.
patent: 5225301 (1993-07-01), Yushina et al.
patent: 5858596 (1999-01-01), Tajima et al.

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