公开(公告)号：JP2014130236A

公开(公告)日：2014-07-10

申请号：JP2012288190

申请日：2012-12-28

Applicant: Kyocera Document Solutions Inc ,  京セラドキュメントソリューションズ株式会社

Inventor： IWASHITA HIROKO ,  WATANABE MASATADA ,  SUGIMOTO KAZUTAKA ,  EZURE KAZUAKI

IPC: G03G5/05

Abstract: PROBLEM TO BE SOLVED: To provide a positively-charged single-layer type electrophotographic photoreceptor that has excellent abrasion resistance and electric characteristics, and an image forming apparatus that includes the positively-charged single-layer type electrophotographic photoreceptor as an image carrier.SOLUTION: A positively-charged single-layer type electrophotographic photoreceptor has a single-layer structured photosensitive layer formed on a conductive substrate, the photosensitive layer including a charge generating material, a charge transport material, a filler, and a binder resin, and is used as an image carrier in an image forming apparatus that includes a charging unit employing a contact charging method. The photosensitive layer contains the filler including one or more types of fine particles having the volume average particle diameter within a predetermined range and selected from the group consisting of silica fine particles and resin fine particles.

Abstract translation: 要解决的问题：提供具有优异的耐磨性和电特性的带正电荷的单层电子照相感光体，以及包括带正电的单层电子照相感光体作为图像载体的图像形成装置。解决方案： 带正电的单层型电子照相感光体具有在导电性基板上形成的单层结构感光层，感光层包含电荷产生材料，电荷输送材料，填充剂和粘合剂树脂，并且用作 图像形成装置中的图像载体，其包括采用接触充电方法的充电单元。 感光层含有包含一种或多种体积平均粒径在预定范围内并选自二氧化硅细颗粒和树脂细颗粒的细颗粒的填料。

公开(公告)号：JP2013109035A

公开(公告)日：2013-06-06

申请号：JP2011251828

申请日：2011-11-17

Applicant: Kyocera Document Solutions Inc ,  京セラドキュメントソリューションズ株式会社

Inventor： EZURE KAZUAKI ,  WATANABE MASATADA ,  SUGIMOTO KAZUTAKA ,  SAITO SAKAE

IPC: G03G5/14 ,  G03G5/00 ,  G03G5/10 ,  G03G21/00

Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor capable of suppressing transfer memory while suppressing the occurrence of black dots, and an image forming apparatus that suppresses the occurrence of transfer memory and is capable of forming suitable images.SOLUTION: An electrophotographic photoreceptor is formed by providing a photosensitive layer directly on a conductive substrate comprising oxidation-treated aluminum or an aluminum alloy. On the surface of the conductive substrate, a resistive layer is formed, which has field intensity in a range of 1.67×10to 3.33×10V/cm and volume resistivity (x) in a range of 2.38×10to 3.01×10Ωcm that are measured by a predetermined measuring method (X).

Abstract translation: 要解决的问题：提供一种能够抑制黑点出现的同时抑制转印记忆的电子照相感光体，以及抑制转印存储器的发生并能够形成合适图像的图像形成装置。 解决方案：通过在包含氧化处理的铝或铝合金的导电基材上直接提供感光层来形成电子照相感光体。 在导电性基板的表面形成电阻层，其场强为1.67×10 7 至3.33×10 8×V / cm，体积电阻率（x）在2.38×10 8 至3.01×10 12 Ωcm，通过预定的测量方法（X）测量。 版权所有（C）2013，JPO＆INPIT

公开(公告)号：JP2014109683A

公开(公告)日：2014-06-12

申请号：JP2012263790

申请日：2012-11-30

Applicant: Kyocera Document Solutions Inc ,  京セラドキュメントソリューションズ株式会社

Inventor： IWASHITA HIROKO ,  WATANABE MASATADA ,  EZURE KAZUAKI ,  SUGIMOTO KAZUTAKA ,  KUBOSHIMA DAISUKE ,  OTSUBO JUNICHIRO

IPC: G03G5/05 ,  G03G5/06

Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor including a single-layered photosensitive layer capable of suppressing the occurrence of black spots and image defects due to a memory effect even when the photosensitive layer has a small thickness, and to provide an image forming apparatus including the electrophotographic photoreceptor as an image carrier.SOLUTION: In an electrophotographic photoreceptor, a specific polycarbonate resin is used in the amount of at least 30 mass% or more as a binder resin used in a single-layered photosensitive layer; and a phthalocyanine pigment is used as a charge generating material in the photosensitive layer, and a charge transport material is included in the photosensitive layer in the amount within a specific range.

Abstract translation: 要解决的问题：即使当感光层具有小厚度时，提供一种包括能够抑制由于记忆效应引起的黑斑和图像缺陷的发生的单层感光层的电子照相感光体，并且提供图像形成装置 包括作为图像载体的电子照相感光体。解决方案：在电子照相感光体中，使用特定聚碳酸酯树脂作为单层感光层中使用的粘合剂树脂的至少30质量％以上。 并且酞菁颜料用作感光层中的电荷产生材料，并且电荷传输材料以特定范围内的量包含在感光层中。

公开(公告)号：JP2014092582A

公开(公告)日：2014-05-19

申请号：JP2012241224

申请日：2012-10-31

Applicant: Kyocera Document Solutions Inc ,  京セラドキュメントソリューションズ株式会社

Inventor： IWASHITA HIROKO ,  SUGIMOTO KAZUTAKA ,  OTSUBO JUNICHIRO ,  WATANABE MASATADA ,  EZURE KAZUAKI

IPC: G03G5/06 ,  G03G15/16

Abstract: PROBLEM TO BE SOLVED: To provide a positively-charged single-layered electrophotographic photoreceptor capable of suppressing the occurrence of a transfer memory even when applied to a high-speed process, and an image forming apparatus using the same.SOLUTION: A positively-charged single-layered electrophotographic photoreceptor includes a photosensitive layer containing at least a charge generating material, an electron transport material, a hole transport material, and a binder resin in a single layer on a conductive base material. The charge generating material contains a phthalocyanine pigment; the content of the electron transport material to the binder resin is 45 to 100 mass%; and when the photoreceptor is charged at +800 V, then charged at -800 V, and exposed at both voltages under conditions of an exposure wavelength of 780 nm, and exposure energy to make a bright potential at 150 V after the lapse of 300 ms after the exposure, a difference between the absolute values of both bright potentials is 150 V or less.

Abstract translation: 要解决的问题：提供一种即使在应用于高速处理时也能够抑制转印记忆的发生的带正电单层电子照相感光体，以及使用其的图像形成装置。解决方案：带正电 单层电子照相感光体包括在导电性基材上的单层中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感光层。 电荷产生材料含有酞菁颜料; 电子传输材料对粘合剂树脂的含量为45〜100质量％。 并且当感光体在+800V下充电时，在-800V充电，并且在曝光波长为780nm的条件下在两个电压下曝光和曝光能量，以在300ms后经过150V的亮电位 曝光后，两个亮电位的绝对值之差为150V以下。

公开(公告)号：JP2014126610A

公开(公告)日：2014-07-07

申请号：JP2012281711

申请日：2012-12-25

Applicant: Kyocera Document Solutions Inc ,  京セラドキュメントソリューションズ株式会社

Inventor： IWASHITA HIROKO ,  WATANABE MASATADA ,  EZURE KAZUAKI ,  SUGIMOTO KAZUTAKA ,  KUBOSHIMA DAISUKE ,  OTSUBO JUNICHIRO

IPC: G03G5/06 ,  G03G15/00

Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor that includes a thin photosensitive layer having high sensitivity and excellent light resistance, and an image forming apparatus that includes the electrophotographic photoreceptor as an image carrier.SOLUTION: An electrophotographic photoreceptor includes, on a supporting substrate, a photosensitive layer in a thickness of 25 μm or less formed at least of a charge generating material, a charge transport material, and a binder resin. The charge generating material is a phthalocyanine pigment; and the charge transport material does not have the maximum absorption peak between 450 nm to 550 nm, and contains at least one type of specific compound as an electron transport material for the charge transport material.

Abstract translation: 要解决的问题：提供一种包括具有高灵敏度和优异耐光性的薄感光层的电子照相感光体，以及包括作为图像载体的电子照相感光体的图像形成装置。解决方案：电子照相感光体包括在支撑基板上 形成至少形成电荷产生材料，电荷输送材料和粘合剂树脂的厚度为25μm以下的感光层。 电荷产生材料是酞菁颜料; 并且电荷传输材料在450nm至550nm之间不具有最大吸收峰，并且包含至少一种作为电荷传输材料的电子传输材料的特定化合物。

公开(公告)号：JP2014092594A

公开(公告)日：2014-05-19

申请号：JP2012241393

申请日：2012-10-31

Applicant: Kyocera Document Solutions Inc ,  京セラドキュメントソリューションズ株式会社

Inventor： IWASHITA HIROKO ,  SUGIMOTO KAZUTAKA ,  OTSUBO JUNICHIRO ,  WATANABE MASATADA ,  EZURE KAZUAKI ,  HAMAZAKI KAZUYA

IPC: G03G5/05 ,  G03G5/06 ,  G03G9/08 ,  G03G15/08

Abstract: PROBLEM TO BE SOLVED: To provide a single-layered electrophotographic photoreceptor capable of suppressing the occurrence of an exposure memory and black dots to provide good images even when used in a high-speed process, and an image forming apparatus using the same.SOLUTION: An electrophotographic photoreceptor includes a photosensitive layer containing at least a charge generating material, an electron transport material, a hole transport material, and a binder resin in a single layer on a conductive base material. The photosensitive layer has a thickness of 10 to 40 μm; the charge generating material contains an oxotitanyl phthalocyanine pigment; the hole transport material is contained in the amount of 50 to 120 parts by mass, and the electron transport material is contained in the amount of 55 to 80 parts by mass, relative to 100 parts by mass of the binder resin; and the binder resin includes a polycarbonate resin containing 15 to 60 mass% of specific repeating unit.

Abstract translation: 要解决的问题：提供一种能够抑制曝光记忆和黑点的发生的单层电子照相感光体，即使在高速工艺中使用也能提供良好的图像，以及使用其的图像形成装置。 电子照相感光体包括在导电性基材上的单层中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感光层。 感光层的厚度为10〜40μm; 电荷产生材料含有氧代钛基酞菁颜料; 相对于100质量份粘合剂树脂，空穴传输材料的含量为50〜120质量份，电子传输材料的含量为55〜80质量份。 粘合剂树脂包含含有15〜60质量％的特定重复单元的聚碳酸酯树脂。

公开(公告)号：JP2014092595A

公开(公告)日：2014-05-19

申请号：JP2012241394

申请日：2012-10-31

Applicant: Kyocera Document Solutions Inc ,  京セラドキュメントソリューションズ株式会社

Inventor： IWASHITA HIROKO ,  SUGIMOTO KAZUTAKA ,  OTSUBO JUNICHIRO ,  WATANABE MASATADA ,  EZURE KAZUAKI

IPC: G03G5/06 ,  G03G5/04

CPC classification number: G03G15/75 ,  G03G5/047 ,  G03G5/0675 ,  G03G5/0696 ,  G03G5/0698

Abstract: PROBLEM TO BE SOLVED: To provide a single-layered electrophotographic photoreceptor capable of suppressing the occurrence of an exposure memory to provide good images even when used in a high-speed process, and an image forming apparatus using the same.SOLUTION: A single-layered electrophotographic photoreceptor includes a photosensitive layer containing at least a charge generating material, an electron transport material, a hole transport material, and a binder resin in a single layer on a conductive base material. The charge generating material contains a phthalocyanine pigment, and an N-type pigment containing at least a perylene pigment and an azo pigment; and the total amount of the N-type pigment is 0.03 parts by mass or more and 10 parts by mass or less relative to 1 part by mass of the phthalocyanine pigment.

Abstract translation: 要解决的问题：提供即使在高速工艺中使用时也能够抑制曝光存储器的出现以提供良好图像的单层电子照相感光体，以及使用其的图像形成装置。 层状电子照相感光体包括在导电性基材上的单层中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感光层。 电荷产生材料含有酞菁颜料和至少含有苝颜料和偶氮颜料的N型颜料; 并且相对于1质量份的酞菁颜料，N型颜料的总量为0.03质量份以上且10质量份以下。

公开(公告)号：JP2014149363A

公开(公告)日：2014-08-21

申请号：JP2013017149

申请日：2013-01-31

Applicant: Kyocera Document Solutions Inc ,  京セラドキュメントソリューションズ株式会社

Inventor： IWASHITA HIROKO ,  WATANABE MASATADA ,  OTSUBO JUNICHIRO ,  EZURE KAZUAKI ,  SUGIMOTO KAZUTAKA

IPC: G03G5/047 ,  G03G5/05 ,  G03G15/00

Abstract: PROBLEM TO BE SOLVED: To provide a positively-charged electrophotographic photoreceptor having higher sensitivity than a conventional positively-charged single-layer electrophotographic photoreceptor, and to provide an image forming apparatus including the positively-charged electrophotographic photoreceptor as an image carrier.SOLUTION: On a conductive substrate, a charge transport layer containing a hole transport material, an electron transport material, and a binder resin, and a charge generating/transport layer containing a charge generating material, a hole transport material, an electron transport material, and a binder resin are laminated in order. The amount of electron transport material contained in the charge transport layer falls within a predetermined range.

Abstract translation: 要解决的问题：提供一种具有比常规的带正电单层电子照相感光体更高的灵敏度的带正电荷的电子照相感光体，并且提供一种包括带正电的电子照相感光体作为图像载体的图像形成装置。解决方案：On 导电性基板，含有空穴传输材料的电荷传输层，电子传输材料和粘合剂树脂，以及含有电荷产生材料，空穴传输材料，电子传输材料和粘合剂的电荷产生/传输层 树脂按顺序层压。 包含在电荷输送层中的电子传输材料的量落在预定范围内。

公开(公告)号：JP2014146005A

公开(公告)日：2014-08-14

申请号：JP2013016083

申请日：2013-01-30

Applicant: Kyocera Document Solutions Inc ,  京セラドキュメントソリューションズ株式会社

Inventor： IWASHITA HIROKO ,  WATANABE MASATADA ,  OTSUBO JUNICHIRO ,  EZURE KAZUAKI ,  SUGIMOTO KAZUTAKA

IPC: G03G5/047 ,  G03G5/05 ,  G03G15/00

CPC classification number: G03C1/73 ,  G03C1/52 ,  G03G5/047 ,  G03G5/0542

Abstract: PROBLEM TO BE SOLVED: To provide a positively-charged photoreceptor more highly sensitive than a conventional single-layered electrophotographic photoreceptor; and to provide an image forming apparatus including the positively-charged photoreceptor as an image carrier.SOLUTION: A positively-charged electrophotographic photoreceptor is formed by laminating (I) a charge transport layer comprising at least a hole transport material and a binder resin, and (II) a charge generating and transport layer containing at least a charge generating material, an electron transport material, a hole transport material, and a binder resin in a single layer, at least in this order on a conductive substrate. The binder resins in the charge transport layer and the charge generating and transport layer are different from each other, and either one of the binder resins contains a polyvinyl acetal resin.

Abstract translation: 要解决的问题：提供比常规单层电子照相感光体更高灵敏度的带正电感光体; 并提供一种包括带正电的感光体作为图像载体的图像形成装置。解决方案：通过层压（I）至少包含空穴传输材料和粘合剂树脂的电荷输送层形成带正电的电子照相感光体，以及 （II）至少在导电性基板上依次包含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。 电荷输送层和电荷产生输送层中的粘合剂树脂彼此不同，粘合剂树脂中的任一种含有聚乙烯醇缩醛树脂。

公开(公告)号：JP2014146001A

公开(公告)日：2014-08-14

申请号：JP2013016003

申请日：2013-01-30

Applicant: Kyocera Document Solutions Inc ,  京セラドキュメントソリューションズ株式会社

Inventor： IWASHITA HIROKO ,  WATANABE MASATADA ,  OTSUBO JUNICHIRO ,  EZURE KAZUAKI ,  SUGIMOTO KAZUTAKA

IPC: G03G5/047 ,  G03G5/05 ,  G03G15/00

Abstract: PROBLEM TO BE SOLVED: To provide a positively-charged electrophotographic photoreceptor more highly sensitive than a conventional positively-charged single-layered electrophotographic photoreceptor; and to provide an image forming apparatus including the positively-charged electrophotographic photoreceptor as an image carrier.SOLUTION: A charge transport layer containing a hole transport material and a binder resin, and a charge generating and transport layer containing a charge generating material, a hole transport material, an electron transport material, and a binder resin, are sequentially laminated on a conductive substrate, so as to form a laminated photosensitive layer; and the charge transport layer includes a polyarylate resin as the binder resin.

Abstract translation: 要解决的问题：提供比常规带正电单层电子照相感光体更高灵敏度的带正电荷的电子照相感光体; 并提供一种包括带正电的电子照相感光体作为图像载体的图像形成装置。解决方案：包含空穴传输材料和粘合剂树脂的电荷传输层，以及含有电荷产生材料的电荷产生和传输层， 传输材料，电子传输材料和粘合剂树脂依次层压在导电性基板上，形成层叠感光层; 电荷传输层包括作为粘合剂树脂的多芳基化合物树脂。