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公开(公告)号：US11635717B2
公开(公告)日：2023-04-25
申请号：US17590165
申请日：2022-02-01
Applicant: CANON KABUSHIKI KAISHA
Inventor： Matsutaka Maeda , Yuji Kitano
IPC: G03G15/20
Abstract: An electrophotographic member comprising a base body and an elastic layer on the base body, the elastic layer including silicone rubber and metallic silicon particles in the silicone rubber; wherein the metallic silicon particles have a mass reduction rate of 0.05% or more.
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公开(公告)号：US11573515B2
公开(公告)日：2023-02-07
申请号：US17717368
申请日：2022-04-11
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yasuhiro Miyahara , Matsutaka Maeda , Yuji Kitano , Makoto Souma , Yutaro Yoshida , Shigeo Kuroda
IPC: G03G15/20
Abstract: A fixing member for electrophotography having an endless shape has a base layer having an endless shape, and an elastic layer on the outer circumferential surface of the base layer. The elastic layer includes a silicone rubber and a filler dispersed in the silicone rubber. The total amount of the filler compounded in the elastic layer is 30 vol % or less based on the total volume of the elastic layer. The elastic layer satisfies the relation of λtd>λmd>λnd. λtd is a thermal conductivity of the elastic layer in the circumferential direction, λnd is a thermal conductivity of the elastic layer in the thickness direction, and λmd, is a thermal conductivity of the elastic layer in the longitudinal direction. λtd is 2.0 W/(m·K) or more, and λnd is 1.3 W/(m·K) or more.
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公开(公告)号：US20220260945A1
公开(公告)日：2022-08-18
申请号：US17590165
申请日：2022-02-01
Applicant: CANON KABUSHIKI KAISHA
Inventor： Matsutaka Maeda , Yuji Kitano
IPC: G03G15/20
Abstract: An electrophotographic member comprising a base body and an elastic layer on the base body, the elastic layer including silicone rubber and metallic silicon particles in the silicone rubber; wherein the metallic silicon particles have a mass reduction rate of 0.05% or more.
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公开(公告)号：US20190377291A1
公开(公告)日：2019-12-12
申请号：US16425104
申请日：2019-05-29
Applicant: CANON KABUSHIKI KAISHA
Inventor： Matsutaka Maeda , Yuji Kitano , Mamo Matsumoto , Katsuhisa Matsunaka , Yasuharu Notoya , Yo Imaizumi , Takuji Oishi , Yasuhiro Miyahara
IPC: G03G15/20
Abstract: Provided is a fixing member includes: a substrate; and an elastic layer on the substrate, wherein the elastic layer contains a rubber and fillers dispersed in the rubber, and wherein an average value of area ratios of large-particle diameter fillers is 20% or more and 40% or less, and the large-particle diameter fillers have an average array degree fL of 0.00 or more and 0.15 or less, an average value of an area ratios of small-particle diameter fillers is 10% or more and 20% or less, the small-particle diameter fillers have an average array degree fS of 0.20 or more and 0.50 or less, and the small-particle diameter fillers have an average array angle ΦS of 60° or more and 120° or less.
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公开(公告)号：US12162986B2
公开(公告)日：2024-12-10
申请号：US17666358
申请日：2022-02-07
Applicant: CANON KABUSHIKI KAISHA
Inventor： Matsutaka Maeda , Yuji Kitano
Abstract: A liquid silicone rubber composition contains metallic silicon particles. The content of the metallic silicon particles is 35% by volume or more and 45% by volume or less. The volume average particle diameter of the metallic silicon particles is 1 μm or more and 20 μm or less. The ratio A/B of viscosity A at a shear rate of 0.02/sec to viscosity B at a shear rate of 1/sec of the composition is 2.0 or less.
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公开(公告)号：US12025926B2
公开(公告)日：2024-07-02
申请号：US18299241
申请日：2023-04-12
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yasuhiro Miyahara , Shigeo Kuroda , Matsutaka Maeda , Yuji Kitano , Makoto Souma , Yutaro Yoshida
IPC: G03G15/20
CPC classification number: G03G15/2057 , G03G15/206 , G03G15/2064 , G03G2215/2051 , G03G2215/2054
Abstract: An electrophotographic member having an endless shape comprises: a substrate; and an elastic layer on an outer peripheral surface thereof. The elastic layer contains a silicone rubber and metal silicon fillers dispersed in the silicone rubber. An average of area ratios of the metal silicon fillers in respective first binarized images is 42% or less, and an average of area ratios of the metal silicon fillers in respective second binarized images is 42% or less. The elastic layer has λ of 1.30 W/(m·K) or more, where λ is a thermal conductivity of the elastic layer in a thickness direction thereof, and the elastic layer has ρV of 9.0 LOG Ω·cm or more, where ρV is a common logarithm value of a volume resistivity thereof.
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公开(公告)号：US10890869B2
公开(公告)日：2021-01-12
申请号：US16879351
申请日：2020-05-20
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yasuhiro Miyahara , Naoki Akiyama , Hiroto Sugimoto , Hiroki Muramatsu , Akeshi Asaka , Noriaki Kobayashi , Matsutaka Maeda , Yuji Kitano
IPC: G03G15/20
Abstract: An electrophotographic fixing member having an elastic layer that is high in thermal conductivity in the thickness direction, resists causing fracture or plastic deformation even by repeated compression in a high temperature state, and is low in hardness. The electrophotographic fixing member has a substrate, and an elastic layer provided on the substrate, wherein the elastic layer contains a filler containing an inorganic oxide and is provided on an outer circumference of the substrate, wherein (1) in a binarized image on a first cross-section in a thickness-circumferential direction of the elastic layer and a binarized image on a second cross-section in a thickness-axial direction of the elastic layer, 1.0≤(A/B)≤2.0 and 0.40≤(A+B)≤0.50 are satisfied; and (2) 50°≤θAve≤90° is satisfied.
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8.发明授权
公开(公告)号：US10712697B2
公开(公告)日：2020-07-14
申请号：US16425104
申请日：2019-05-29
Applicant: CANON KABUSHIKI KAISHA
Inventor： Matsutaka Maeda , Yuji Kitano , Mamo Matsumoto , Katsuhisa Matsunaka , Yasuharu Notoya , Yo Imaizumi , Takuji Oishi , Yasuhiro Miyahara
IPC: G03G15/20
Abstract: Provided is a fixing member includes: a substrate; and an elastic layer on the substrate, wherein the elastic layer contains a rubber and fillers dispersed in the rubber, and wherein an average value of area ratios of large-particle diameter fillers is 20% or more and 40% or less, and the large-particle diameter fillers have an average array degree fL of 0.00 or more and 0.15 or less, an average value of an area ratios of small-particle diameter fillers is 10% or more and 20% or less, the small-particle diameter fillers have an average array degree fS of 0.20 or more and 0.50 or less, and the small-particle diameter fillers have an average array angle ΦS of 60° or more and 120° or less.
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公开(公告)号：US20220334522A1
公开(公告)日：2022-10-20
申请号：US17717368
申请日：2022-04-11
Applicant: CANON KABUSHIKI KAISHA
Inventor： Yasuhiro Miyahara , Matsutaka Maeda , Yuji Kitano , Makoto Souma , Yutaro Yoshida , Shigeo Kuroda
IPC: G03G15/20
Abstract: A fixing member for electrophotography having an endless shape has a base layer having an endless shape, and an elastic layer on the outer circumferential surface of the base layer. The elastic layer includes a silicone rubber and a filler dispersed in the silicone rubber. The total amount of the filler compounded in the elastic layer is 30 vol % or less based on the total volume of the elastic layer. The elastic layer satisfies the relation of λtd>λmd>λnd. λtd is a thermal conductivity of the elastic layer in the circumferential direction, λnd is a thermal conductivity of the elastic layer in the thickness direction, and λmd, is a thermal conductivity of the elastic layer in the longitudinal direction. λtd is 2.0 W/(m·K) or more, and λnd is 1.3 W/(m·K) or more.
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公开(公告)号：US10859956B2
公开(公告)日：2020-12-08
申请号：US16841860
申请日：2020-04-07
Applicant: CANON KABUSHIKI KAISHA
Inventor： Matsutaka Maeda , Mamo Matsumoto , Yuji Kitano , Yo Imaizumi , Makoto Souma
Abstract: Provided is a fixing member having excellent heat resistance and durability. The fixing member includes a substrate and an elastic layer on the substrate, wherein the elastic layer includes: rubber, thermally conductive particles dispersed in the rubber, and iron oxide particles dispersed in the rubber, a content of the thermally conductive particles in the elastic layer is 30% by volume or more and 50% by volume or less, a content of the iron oxide particles in the elastic layer is 0.01% by volume or more and 1.0% by volume or less, the thermally conductive particles are at least one selected from the group consisting of aluminum oxide, metal silicon, magnesium oxide, zinc oxide, and silicon carbide, and the iron oxide particles have a localization index M of 0.2 or more and less than 0.8, wherein the localization index M is determined by specific steps.
