公开(公告)号：EP4336264A1

公开(公告)日：2024-03-13

申请号：EP23163376.9

申请日：2023-03-22

Applicant: FUJIFILM Business Innovation Corp.

Inventor： TANAKA, Tomoaki ,  YOSHIHARA, Kotaro ,  FUJITA, Asafumi ,  YAWADA, Teppei ,  MURAKAMI, Tsuyoshi

IPC: G03G9/08 ,  G03G9/087 ,  G03G9/09

Abstract: An electrostatic charge image developing toner set contains a white toner that contains white toner particles including a binder resin, a white colorant, and a release agent, and a non-white color toner that contains color toner particles including a binder resin, a color colorant, and a release agent, in which, in observation of cross sections of the white toner particles and the color toner particles, in a case where a proportion of an area of a domain of a release agent present in a surface layer region from a surface of the white toner particles to a depth of 1 µm or less with respect to an area of all domains of the release agent present in a cross section of the white toner particles is represented by Ww, and a case where a proportion of an area of a domain of a release agent present in a surface layer region from a surface of the color toner particles to a depth of 1 µm or less with respect to an area of all domains of the release agent present in a cross section of the color toner particles is represented by W C , a relationship of W C W is satisfied.

公开(公告)号：EP4336267A1

公开(公告)日：2024-03-13

申请号：EP23196747.2

申请日：2023-09-12

Applicant: FUJIFILM Business Innovation Corp.

Inventor： YAWADA, Teppei ,  YOSHIHARA, Kotaro ,  FUJITA, Asafumi ,  TANAKA, Tomoaki ,  MURAKAMI, Tsuyoshi

IPC: G03G9/097 ,  G03G9/08

Abstract: An electrostatic image developing white toner includes white toner particles including a binder resin and a white coloring agent; and an external additive including poly(meth)acrylate particles, wherein the white toner particles have a volume-average particle size D 50W of 6.0 µm or more and 10 µm or less, a ratio of the white toner particles having a particle size of 3.2 µm or less relative to all the white toner particles is 0.5 vol% or more and 3 vol% or less, the white toner particles have a specific surface area S w of 0.7 cm 2 /g or more and 1.2 cm 2 /g or less, and an external addition amount of the poly(meth)acrylate particles relative to the white toner particles is 0.1 mass% or more and 2.0 mass% or less.

公开(公告)号：EP4336265A1

公开(公告)日：2024-03-13

申请号：EP23163384.3

申请日：2023-03-22

Applicant: FUJIFILM Business Innovation Corp.

Inventor： YOSHIHARA, Kotaro ,  FUJITA, Asafumi ,  YAWADA, Teppei ,  TANAKA, Tomoaki ,  MURAKAMI, Tsuyoshi

IPC: G03G9/08 ,  G03G9/097

Abstract: A toner set has a white toner and a color toner, in which in a case where Cw [mg/L] represents an amount of a cation on a surface of the white toner, measured by ion chromatography, and Cc [mg/L] represents an amount of a cation on a surface of the color toner, measured by ion chromatography, the toner set satisfies Conditions (1) and (2). 0.3 mg / L ≤ Cc ≤ 1.2 mg / L Cw / Cc ≤ 0.8