Bilderzeugungsvorrichtung und Bilderzeugungsverfahren

Details

Veröffentlichungs-Nr.

EP4782925

Anmeldetag

18. Dezember 2025

Veröffentlichung

29. Juli 2026

Rechtsraum

EP

IPC

G03G9/08, G03G9/09, G03G15/20

Abstract

An image forming apparatus includes: an image holder; a charging unit that charges a surface of the image holder; an electrostatic image forming unit that forms an electrostatic image on the charged surface of the image holder; a developing unit that accommodates an electrostatic image developer containing a toner that contains toner particles containing a metal pigment having an average equivalent circle diameter of 5 µm or more and 15 µm or less, in which an average value of ratios b/a between a major axis diameter a and a minor axis diameter b in a cross section of the toner particles is 0.5 or more and 0.8 or less, and an average value of areas of the metal pigment occupying a projected image of the toner particles in a case of being viewed in a thickness direction is 0.5 or more and 0.7 or less, the developing unit developing the electrostatic image formed on the surface of the image holder into a toner image with the electrostatic image developer; a transfer unit that transfers the toner image onto a recording medium; and a fixing device that includes a fixing member having a surface layer that contains no fluorine atom and is a cured product of a composition containing an organopolysiloxane (T type) having a silsesquioxane structure represented by Formula 1 and dimethyl organopolysiloxane (D type), in which a contained ratio (T type/D type) of the organopolysiloxane (T type) to the dimethyl organopolysiloxane (D type) is 1/9 or more and 9/1 or less, and a difference ΔH between a maximum value and a minimum value of an ultramicrohardness of the surface layer, that is measured at any 50 points by an ultramicrohardness test specified in JIS Z2255 (2003), is 0 or more and 15 or less, the fixing device fixing the toner image onto the recording medium by bringing the surface layer of the fixing member into contact with the toner image on the recording medium and then heating and pressurizing the recording medium. Formula 1 [R<1>SiO<3/2>]<m> (in Formula 1, R<1>'s each independently represent a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group, a group represented by -C(=O)-CR<2>3 , or a monovalent organic group having a reactive group, a plurality of R<1>'s may be the same or different from each other, R<2> represents a hydrogen atom, a methyl group, or an ethyl group, in a case of a plurality of R<2>'s, the plurality of R<2>'s may be the same or different from each other, the monovalent organic group may be substituted with a halogen atom, a hydroxy group, an alkoxy group, an aryloxy group, an aralkyloxy group, or an oxy group, the alkyl group, the alkenyl group, the alkynyl group, the aralkyl group, and the aryl group may have a substituent, and m represents a positive integer)

Anmelder

Firma

FUJIFILM Business Innovation Corp.

Land

🇯🇵 Japan

Fachgebiete