Toner for developing electrostatic charge image, electrostatic charge image developer, toner cartridge, process cartridge, image forming apparatus, and image forming method
AssigneeFUJIFILM Business Innovation Corp.
InventorsShintaro Anno, Atsushi Sugawara, Yoshimasa Fujihara, Daisuke Noguchi, Satoshi Miura
Life of this patent
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Abstract
A toner for developing an electrostatic charge image contains toner particles containing at least one binder resin; the Mg element in an amount such that in an x-ray fluorescence analysis of the toner, the net intensity of the peak for the Mg element is 0.10 kcps or more and 1.20 kcps or less; and at least one external additive including particles of at least one compound represented by formula (1), MTiO3 (1) where M represents at least one selected from the group consisting of Ca, Sr, and Ba.
Claims18
A toner for developing an electrostatic charge image, the toner comprising:
- toner particles containing at least one binder resin;
- a Mg element in an amount such that in an x-ray fluorescence analysis of the toner, a net intensity of a peak for the Mg element is 0.10 kcps or more and 1.20 kcps or less;
- and
- at least one external additive including particles of at least one compound represented by formula (1) below,
- MTiO3 (1)
- where M represents at least one selected from the group consisting of Ca, Sr, and Ba,
- wherein the binder resin includes an amorphous resin and at least one crystalline resin,
- wherein in a cross-sectional observation of the toner particles, there are toner particles in which at least two domains of the crystalline resin meet condition (B1) or (B2) below:
- condition (B1) that each domain of the crystalline resin measures 0.5 μm or more and 1.5 μm or less along a major axis thereof;
- condition (B2) that at least one of the two domains of the crystalline resin measures that along a major axis thereof that 10% or more and 30% or less of a longest diameter of the toner particle,
- and in a cross-sectional observation of the toner particles, there are toner particles in which at least two domains of the crystalline resin meet conditions (A), (C), and (D) below:
- condition (A) that each domain of the crystalline resin has an aspect ratio of 5 or more and 40 or less;
- condition (C) that a line extended from the major axis of each domain of the crystalline resin makes an angle of 60° or more and 90° or less with a tangent to a surface of the toner particle at a point of contact between the extended line and the surface;
- and
- condition (D) that lines extended from the major axis of the two domains of the crystalline resin cross each other at an angle of 45° or more and 90° or less.
A toner for developing an electrostatic charge image, the toner
- comprising:
- toner particles containing at least one binder resin;
- a Mg element in an amount such that in an x-ray fluorescence analysis of the toner, a net intensity of a peak for the Mg element is 0.10 kcps or more and 1.20 kcps or less;
- and
- at least one external additive including particles of at least one compound represented by formula (1) below,
- MTiO3 (1)
- where M represents at least one selected from the group consisting of Ca, Sr, and Ba,
- wherein the ratio D/d between a volume-average diameter D of the toner particles and an average primary-particle diameter d of the particles of at least one compound represented by formula (1) is 39 or more and 70 or less,
- wherein the binder resin includes an amorphous resin and at least one crystalline resin and the crystalline resin includes at least one polycondensate of a linear aliphatic α,ω-dicarboxylic acid and a linear aliphatic α,ω-diol.
Dependencies are inferred from the claim text.