公开(公告)号：US20240255859A1

公开(公告)日：2024-08-01

申请号：US18562364

申请日：2022-03-25

申请人： KYOCERA Document Solutions Inc.

发明人： Kazutaka SUGIMOTO ,  Ryota MORIKAWA ,  Hiroki OTSUKA

IPC分类号： G03G5/05 ,  G03G5/047 ,  G03G5/06

CPC分类号： G03G5/056 ,  G03G5/047 ,  G03G5/0672

摘要： An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer contains a charge generating material, a hole transport material, a first resin, and a second resin. The first resin is contained in the same layer as the second resin. The second resin has a percentage content of at least 1% and no greater than 3% to the total mass of the first resin and the second resin. The first resin includes repeating units represented by formulas (1), (2), (3), and (4).




The repeating unit represented by the formula (3) has a percentage content of greater than 0% and less than 20% to the total number of repeats of the repeating units represented by the formulas (1) and (3). The second resin is a polyester resin different from the first resin.

公开(公告)号：US20240353792A1

公开(公告)日：2024-10-24

申请号：US18636961

申请日：2024-04-16

申请人： KYOCERA Document Solutions Inc.

发明人： Yuko IWASHITA ,  Jun AZUMA ,  Keiji MARUO ,  Kazuaki EZURE ,  Yuichi YOSHIDA ,  Kazutaka SUGIMOTO ,  Yasuhiro OISHI ,  Kazunari HAMASAKI

IPC分类号： G03G21/18 ,  G03G5/14 ,  G03G7/00 ,  G03G15/095

CPC分类号： G03G21/1814 ,  G03G5/142 ,  G03G7/0053 ,  G03G15/095 ,  G03G2215/00957

摘要： An electrophotographic photosensitive member includes a conductive substrate, an intermediate layer provided on the conductive substrate, and a photosensitive layer provided on the intermediate layer. The intermediate layer contains a specific polyamide resin and specific inorganic particles. The specific inorganic particles each include a metal oxide particle and a surface treatment layer covering at least a part of the surface of the metal oxide particle. The surface treatment layers contain a component derived from an organic siloxane compound and at least one of aluminum oxide and silica. The specific polyamide resin includes a first repeating unit derived from an aliphatic dicarboxylic acid with a carbon number of at least 8 and no greater than 20 and a second repeating unit derived from a diamine compound with a cycloalkane structure.

公开(公告)号：US20160223923A1

公开(公告)日：2016-08-04

申请号：US15007332

申请日：2016-01-27

申请人： KYOCERA Document Solutions Inc.

发明人： Yuko IWASHITA ,  Kazutaka SUGIMOTO ,  Takafumi MATSUMOTO

IPC分类号： G03G15/00

CPC分类号： G03G5/0609 ,  G03G5/0668 ,  G03G5/0677 ,  G03G5/0696

摘要： An electrophotographic photosensitive member includes a single-layer type photosensitive layer including phthalocyanine or a derivative thereof and an electron transport material. The electron transport material includes at least one first compound represented by formula (1) or (2) shown below and at least one second compound represented by formula (3), (4), or (5) shown below. A total amount of the at least one first compound and the at least one second compound is no less than 60 parts by mass and no greater than 120 parts by mass relative to 100 parts by mass of the binder resin. An amount of the at least one first compound is no less than 35 parts by mass and no greater than 80 parts by mass. An amount of the at least one second compound is no less than 25 parts by mass and no greater than 40 parts by mass.

摘要翻译： 电子照相感光构件包括包含酞菁或其衍生物的单层型感光层和电子传输材料。 电子传输材料包括由下述式（1）或（2）表示的至少一种第一化合物和至少一种由下式（3），（4）或（5）表示的第二化合物。 相对于100质量份粘合剂树脂，至少一种第一化合物和至少一种第二化合物的总量不小于60质量份且不大于120质量份。 所述至少一种第一化合物的量不小于35质量份且不大于80质量份。 所述至少一种第二化合物的量不小于25质量份且不大于40质量份。

公开(公告)号：US20160223921A1

公开(公告)日：2016-08-04

申请号：US15010098

申请日：2016-01-29

申请人： KYOCERA Document Solutions Inc.

发明人： Yuko IWASHITA ,  Kazutaka SUGIMOTO ,  Takafumi MATSUMOTO

IPC分类号： G03G15/00

CPC分类号： G03G5/047 ,  G03G5/0614 ,  G03G5/0672 ,  G03G5/0696

摘要： An electrophotographic photosensitive member includes a photosensitive layer. The photosensitive layer contains a charge generating material and a hole transport material represented by general formula (1) shown below in a single layer. Titanyl phthalocyanine contained as the charge generating material exhibits a main peak at a Bragg angle 2θ±0.2°=27.2° in a CuKα characteristic X-ray diffraction spectrum and satisfies either (B) or (C), shown below, in a differential scanning calorimetry spectrum. (B) A peak is not present in a range from 50° C. to 400° C., other than a peak resulting from vaporization of adsorbed water. (C) A peak is not present in a range from 50° C. to 270° C., other than a peak resulting from vaporization of adsorbed water, and a peak is present in a range from 270° C. to 400° C.

摘要翻译： 电子照相感光构件包括感光层。 感光层在单层中含有下述通式（1）所示的电荷产生材料和空穴传输材料。 在CuKα特征X射线衍射光谱中，作为电荷产生材料含有的酞菁酞菁在布拉格角为2θ±0.2°= 27.2°时呈现主峰，并且在差示扫描中满足下述（B）或（C） 量热谱 （B）除了由吸附水蒸发得到的峰值以外，峰值不存在于50℃〜400℃的范围内。 （C）除了吸附水的蒸发产生的峰以外，峰不在50℃〜270℃的范围内，峰值存在于270〜400℃的范围内 。

公开(公告)号：US20200233321A1

公开(公告)日：2020-07-23

申请号：US16746274

申请日：2020-01-17

申请人： KYOCERA Document Solutions Inc.

发明人： Kazutaka SUGIMOTO ,  Kensuke OKAWA ,  Jun AZUMA

IPC分类号： G03G5/047 ,  G03G5/05

摘要： An electrophotographic photosensitive member includes a conductive substrate, a charge generating layer, and a charge transport layer. The charge generating layer has a thickness of at least 0.07 μm. The charge transport layer contains a binder resin, a hole transport material, and meta-terphenyl. The binder resin includes a polyarylate resin including repeating units and a group represented by respective general formulas (1) to (3). The electrophotographic photosensitive member satisfies at least two conditions of: (A) the charge generating layer has a thickness of at least 0.12 μm; (B) the charge transport layer contains a specific amount of fluororesin particles; and (C) the charge transport layer contains meta-terphenyl in an amount of at least 5.0 parts by mass and no greater than 15.0 parts by mass relative to 100 parts by mass of the binder resin.

公开(公告)号：US20140212803A1

公开(公告)日：2014-07-31

申请号：US14169031

申请日：2014-01-30

申请人： KYOCERA DOCUMENT SOLUTIONS INC.

发明人： Yuko IWASHITA ,  Yukimasa WATANABE ,  Junichiro OTSUBO ,  Kazuaki EZURE ,  Kazutaka SUGIMOTO

IPC分类号： G03G15/00

CPC分类号： G03C1/73 ,  G03C1/52 ,  G03G5/047 ,  G03G5/0542

摘要： A positively chargeable electrophotographic photosensitive member has a photosensitive layer. The photosensitive layer at least includes the following layers layered in the stated order: (I) a charge transport layer at least containing a hole transport material and a binder resin; and (II) a charge generating-and-transporting layer at least containing a charge generating material, an electron transport material, a hole transport material, and a binder resin all within this layer. The binder resin contained in the charge transport layer is different from the binder resin contained in the charge generating-and-transporting layer, and either of the binder resins contains a polyvinyl acetal resin.

摘要翻译： 带正电的电子照相感光构件具有感光层。 感光层至少包括以下顺序层叠的以下层：（I）至少含有空穴传输材料和粘合剂树脂的电荷传输层; 和（II）至少含有电荷产生材料，电子传输材料，空穴传输材料和粘合剂树脂的电荷产生和传输层。 包含在电荷输送层中的粘合剂树脂与电荷产生 - 输送层中所含的粘合剂树脂不同，并且任一种粘合剂树脂含有聚乙烯醇缩醛树脂。

公开(公告)号：US20240353772A1

公开(公告)日：2024-10-24

申请号：US18638333

申请日：2024-04-17

申请人： KYOCERA Document Solutions Inc.

发明人： Yuko IWASHITA ,  Jun AZUMA ,  Keiji MARUO ,  Kazuaki EZURE ,  Kazutaka SUGIMOTO ,  Yasuhiro OISHI ,  Kazunari HAMASAKI

IPC分类号： G03G5/14 ,  G03G5/10

CPC分类号： G03G5/144 ,  G03G5/102

摘要： An electrophotographic photosensitive member includes a conductive substrate, an intermediate layer provided on the conductive substrate, and a photosensitive layer provided on the intermediate layer. The intermediate layer contains a specific polyamide resin and specific inorganic particles. The specific inorganic particles each include a metal oxide particle and a surface treatment layer covering at least a part of the surface of the metal oxide particle. The surface treatment layers contain at least one of aluminum oxide and silica. The specific polyamide resin includes a first repeating unit derived from an aliphatic dicarboxylic acid with a carbon number of at least 8 and no greater than 20 and a second repeating unit derived from a diamine compound with a cycloalkane structure. The total percentage content of the first repeating unit and the second repeating unit to all repeating units included in the specific polyamide resin is at least 80% by mol.

公开(公告)号：US20240353771A1

公开(公告)日：2024-10-24

申请号：US18638286

申请日：2024-04-17

申请人： KYOCERA Document Solutions Inc.

发明人： Yuko IWASHITA ,  Jun AZUMA ,  Keiji MARUO ,  Kazuaki EZURE ,  Kazutaka SUGIMOTO ,  Yasuhiro OISHI ,  Kazunari HAMASAKI

IPC分类号： G03G5/14 ,  G03G7/00 ,  G03G15/00

CPC分类号： G03G5/142 ,  G03G7/0053 ,  G03G15/75

摘要： An electrophotographic photosensitive member includes a conductive substrate, an intermediate layer provided on the conductive substrate, and a photosensitive layer provided on the intermediate layer. The intermediate layer contains a specific polyamide resin and specific inorganic particles. The specific inorganic particles each include a metal oxide particle and a surface treatment layer covering at least a part of the surface of the metal oxide particle. The surface treatment layers contain a component derived from an organic siloxane compound. The specific polyamide resin includes a first repeating unit derived from an aliphatic dicarboxylic acid with a carbon number of at least 8 and no greater than 20 and a second repeating unit derived from a diamine compound with a cycloalkane structure. The total percentage content of the first repeating unit and the second repeating unit to all repeating units included in the specific polyamide resin is at least 80% by mol.

公开(公告)号：US20200057396A1

公开(公告)日：2020-02-20

申请号：US16496220

申请日：2018-03-16

申请人： KYOCERA Document Solutions Inc.

发明人： Yuko IWASHITA ,  Kazunari HAMASAKI ,  Kazutaka SUGIMOTO

IPC分类号： G03G5/047 ,  G03G5/06 ,  G03G5/05 ,  G03G21/18 ,  G03G15/00

摘要： An electrophotographic photosensitive member includes a photosensitive layer of a single layer. The photosensitive layer contains a charge generating material, a hole transport material, an electron transport material, and a binder resin. An optical response time is 0.05 milliseconds or longer and 0.85 milliseconds or shorter. The optical response time is a time from irradiation of a surface of the photosensitive layer charged to +800 V with pulse light having a wavelength of 780 nm to decay of a surface potential of the photosensitive layer from +800 V to +400 V. The pulse light has an intensity that allows the surface potential of the photosensitive layer to decay to +200 V from +800 V after 400 milliseconds elapse from the irradiation of the surface of the photosensitive layer charged to +800 V with the pulse light. The photosensitive layer has a Martens hardness at 50° C. of at least 160 N/mm2.

公开(公告)号：US20190235400A1

公开(公告)日：2019-08-01

申请号：US16260255

申请日：2019-01-29

申请人： KYOCERA Document Solutions Inc.

发明人： Yuko IWASHITA ,  Kazunari HAMASAKI ,  Kazutaka SUGIMOTO

IPC分类号： G03G5/047 ,  G03G5/05 ,  G03G5/06 ,  G03G5/087

摘要： An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer of a single layer. The photosensitive layer contains a charge generating material, a hole transport material, an electron transport material, and a binder resin. An optical response time is at least 0.05 milliseconds and no greater than 0.85 milliseconds. The binder resin includes a polycarbonate resin including a repeating unit represented by general formula (1) shown below and a repeating unit represented by general formula (2) shown below.