Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1997-11-05
2000-02-15
Rodee, Christopher D.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430108, 430137, G03G 9113
Patent
active
060251034
ABSTRACT:
Toner magnetic powder which uses a resin as a binder and contains a dye is coated by a methyl methacrylate resin, thereby forming a carrier. A developer is formed by such a carrier in which those two components are mixed. An electric conductivity of the impurity extracted water of the carrier due to the pressurization in the pure water is set to 60 .mu.S/cm or less. Namely, the purity is improved so that the electric conductivity of the impurity extracted water of the methyl methacrylate resin due to the pressurization in the pure water is set to 20 .mu.S/cm or less, and the purity is improved so that the electric conductivity of the impurity extracted water of the magnetic powder due to the pressurization in the pure water is set to 60 .mu.S/cm or less, thereby forming a carrier. A carbon addition amount upon manufacturing of the carrier is controlled so that the electric resistance of the carrier is set to a value within a range of 1.times.10.sup.4 to 1.times.10.sup.8 .OMEGA.cm. Further, a carbon addition amount upon manufacturing of the toner is limited so that the electric resisance of the toner is set to 1.times.10.sup.11 .OMEGA.cm or more.
REFERENCES:
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Physical Chemistry, Second Edition, J.Philip Bromberg, pp. 304-311 (1984).
Diamond, Arthur S. (1991) Handbook of Imaging Materials. New York: Marcel-Dekker Inc., pp. 213-215.
CRC Handbook of Chemistry and Physics, 66th Edition, RC Weast, editor, CRC Press, Inc.,, Boca Raton, FL, pp. D-165 --D-167 (1985).
English Translation of JP 7-146592 Jun. 1995.
Nakamura Yasushige
Sawatari Norio
Fujitsu Limited
Rodee Christopher D.
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