MAGNETIC BLACK TONER FOR DEVELOPING ELECTROSTATIC LATENT IMAGE AND MULTICOLOR OR FULL-COLOR IMAGE FORMING METHOD

MAGNETIC BLACK TONER FOR DEVELOPING ELECTROSTATIC LATENT IMAGE AND MULTICOLOR OR FULL-COLOR IMAGE FORMING METHOD

PROBLEM TO BE SOLVED: To obtain a magnetic black toner having easily adjustable luster and capable of forming a high grade image having moderate luster with high transfer efficiency. SOLUTION: This magnetic black toner contains 1st inorg. fine powder besides magnetic black toner particles contg. a b...

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Bibliographische Detailangaben
Hauptverfasser: MARUYAMA KAZUO, KASUYA TAKASHIGE, YUSA HIROSHI, NOZAWA KEITA, URAWA MOTOO, TAKANO MASAO, KARAKI YUKI
Format: Patent
Sprache:eng
Schlagworte:
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Zusammenfassung:PROBLEM TO BE SOLVED: To obtain a magnetic black toner having easily adjustable luster and capable of forming a high grade image having moderate luster with high transfer efficiency. SOLUTION: This magnetic black toner contains 1st inorg. fine powder besides magnetic black toner particles contg. a bonding resin, 30-200 pts.wt. magnetic substance based on 100 pts.wt. of the bonding resin and 1st solid wax having the main heat absorption peak by DSC in the range of 60-120 deg.C. The ratio (Mw/Mn) of the wt. average mol.wt. Mw of the wax to the number average mol.wt. Mn is 1.0-2.0. In the mol.wt. distribution of the THF-soluble component of the bonding resin, the content (M1) of a part whose mol.wt. is 500,000 is 2-25% and the relation of M1>=M2>M3 is satisfied. The ratio of the viscoelasticity tan δ of the bonding resin at 150 deg.C to that at 100 deg.C is >=1 and the values Emin and Emax at 150-190 deg.C are in the range of 0.5-3.0.