公开(公告)号：US20240053699A1

公开(公告)日：2024-02-15

申请号：US18490462

申请日：2023-10-19

Applicant: CANON KABUSHIKI KAISHA

Inventor： MASAHIRO WATANABE ,  KANA SATO ,  TETSUO HINO ,  RYO OGAWA ,  TAKAYUKI HIRATANI

IPC: G03G15/00 ,  G03G15/08

CPC classification number: G03G15/75 ,  G03G15/0868 ,  G03G2215/066

Abstract: An electrophotographic member comprising: a mandrel; and an elastic layer on an outer periphery of the mandrel, the elastic layer containing a polyurethane elastomer including a matrix and domains dispersed in the matrix, a parameter A and a parameter B satisfying a relationship of A

公开(公告)号：US20240255403A1

公开(公告)日：2024-08-01

申请号：US18587732

申请日：2024-02-26

Applicant: CANON KABUSHIKI KAISHA

Inventor： RYO OGAWA ,  TAKAYUKI HIRATANI ,  KANA SATO ,  MASAHIRO WATANABE ,  TETSUO HINO

IPC: G01N3/42 ,  B08B1/16 ,  G01N23/201 ,  G03G21/00

CPC classification number: G01N3/42 ,  B08B1/16 ,  G01N23/201 ,  G01N2203/0082 ,  G03G21/0017

Abstract: The molded body is a non-foamed molded body including a polyurethane, wherein a Martens hardness measured at a point on the surface of the molded body positioned at a shortest distance from the center of gravity G is 1.0 N/mm2 or more, and three points of Martens hardness measured in a cross-section of the molded body satisfies a specific relational expression, wherein an index value Kω from a scattering profile obtained by allowing a characteristic X-ray from a Cu tube to incident on a surface region to be evaluated of the molded body satisfies a specific relational expression, and wherein the molded body has an erosion rate E of 0.6 μm/g or less, which is measured with spherical alumina particles having an average particle diameter (D50) of 3.0 μm in the surface region to be evaluated.

公开(公告)号：US20240043685A1

公开(公告)日：2024-02-08

申请号：US18487225

申请日：2023-10-16

Applicant: CANON KABUSHIKI KAISHA

Inventor： TAKAYUKI HIRATANI ,  RYO OGAWA ,  KANA SATO ,  MASAHIRO WATANABE ,  TETSUO HINO

IPC: C08L75/04 ,  C08G18/10 ,  C08G18/44

CPC classification number: C08L75/04 ,  C08G18/10 ,  C08G18/44

Abstract: Provided is a polyurethane elastomer having excellent friction properties (low friction coefficient), high wear resistance, and low hardness. The polyurethane elastomer includes: a first repeating structural unit represented by the general formula (1) and a second repeating structural unit represented by the general formula (2). The polyurethane elastomer includes a matrix phase and a domain phase dispersed in the matrix phase. The matrix phase includes the first repeating structural unit. The domain phase includes the second repeating structural unit.