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Patent Searching and Data


Title:
DEVELOPING APPARATUS, ELECTROPHOTOGRAPHY PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2021/079917
Kind Code:
A1
Abstract:
This developing apparatus comprises: a toner; and a developer support body. The developer support body includes: an electrically conductive base material; and a surface layer that is a single layer on the base material. The surface layer has a matrix that contains a crosslinked urethane resin as a binder. Formulae (1) and (2) are satisfied if: E1 denotes the elastic modulus of the matrix in a first region 41 that extends to a depth of 0.1 µm from the outer surface, as measured at a cross section in the thickness direction of the surface layer; and E2 denotes the elastic modulus of the matrix in a second region 42 that extends to a depth of 1.0-1.1 µm from the outer surface. The Martens hardness, as measured at a maximum load of 2.0×10-4 N, is 85-1100 MPa. Formula (1): E1 ≥ 200 MPa Formula (2): 10 MPa ≤ E2 ≤ 100 MPa

Inventors:
UESUGI TOMOYA (JP)
NAGAOKA KAZUAKI (JP)
ISHII TORU (JP)
SUGIYAMA RYO (JP)
NISHI AKIO (JP)
YAMAWAKI KENTARO (JP)
NAKAMURA MINORU (JP)
Application Number:
PCT/JP2020/039611
Publication Date:
April 29, 2021
Filing Date:
October 21, 2020
Export Citation:
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Assignee:
CANON KK (JP)
International Classes:
C08F20/20; G03G9/08; G03G15/08
Foreign References:
JP2009237463A2009-10-15
JP2014197064A2014-10-16
JP2018194837A2018-12-06
Attorney, Agent or Firm:
OKABE Yuzuru et al. (JP)
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