公开(公告)号：EP2898371A4

公开(公告)日：2015-08-19

申请号：EP13839660

申请日：2013-09-12

申请人： RICOH CO LTD

发明人： YAMAUCHI YOSHITAKA ,  SUZUKI KAZUMI

IPC分类号： G03G9/087 ,  G03G9/08

CPC分类号： G03G9/08764 ,  G03G9/081 ,  G03G9/0821 ,  G03G9/0825 ,  G03G9/08733 ,  G03G9/08755 ,  G03G9/08795 ,  G03G9/08797

摘要： Provided is a toner including a crystalline resin and a non-crystalline resin. In a reflected electron image of a cross-section of the toner stained by ruthenium tetroxide captured by a scanning electron microscope, the ratio of regions stained by ruthenium tetroxide is from 50 area % to 80 area %. In a reflected electron image of the surface of the toner stained by ruthenium tetroxide captured by a scanning electron microscope, the ratio of regions stained by ruthenium tetroxide is from 10 area % to 40 area %.

公开(公告)号：EP2756356A4

公开(公告)日：2015-02-25

申请号：EP12831678

申请日：2012-09-12

申请人： RICOH CO LTD

发明人： MORIYA YOSHIHIRO ,  YAMADA MASAHIDE ,  NEMOTO TAICHI ,  NAKAJIMA YUKIKO ,  YAMAUCHI YOSHITAKA ,  MAKABE KEIJI ,  YAMASHITA DAIKI ,  AMEMORI SUZUKA ,  SABU AKIYOSHI

IPC分类号： G03G9/087 ,  G03G9/08

CPC分类号： G03G9/08755 ,  G03G9/0821 ,  G03G9/08788 ,  G03G9/08791 ,  G03G9/08795 ,  G03G9/08797

摘要： An electrophotographic toner including: a binder resin, wherein the binder resin has one glass transition temperature Tg and the glass transition temperature Tg of the binder resin is within 25° C. to 65° C. as measured in second heating with a differential scanning calorimeter at a heating rate of 5° C./min, and wherein a phase image of the binder resin obtained with an atomic force microscope (AFM) of tapping mode contains first phase difference regions and a second phase difference region such that the first phase difference regions are dispersed in the second phase difference region, where the first phase difference regions correspond to greater phase difference regions and the second phase difference region corresponds to a smaller phase difference region when an intermediate value between a maximum value and a minimum value of the phase differences is used as a threshold.

公开(公告)号：EP2893400A4

公开(公告)日：2015-09-30

申请号：EP13834812

申请日：2013-08-30

申请人： RICOH CO LTD

发明人： MIYAAKE AZUMI ,  SUZUKI KAZUMI ,  SHIBA MASANA ,  MORITA TATSUYA ,  YAMAUCHI YOSHITAKA

IPC分类号： G03G9/087 ,  G03G9/08

CPC分类号： G03G9/08755 ,  G03G9/0819 ,  G03G9/0821 ,  G03G9/0825 ,  G03G9/08764 ,  G03G9/08788 ,  G03G9/08797

公开(公告)号：EP2736944A4

公开(公告)日：2015-03-18

申请号：EP12820546

申请日：2012-07-27

申请人： RICOH CO LTD

发明人： NEMOTO TAICHI ,  TANAKA CHIAKI ,  YAMAUCHI YOSHITAKA

IPC分类号： C08G63/81 ,  C08G63/82

CPC分类号： C08G63/78 ,  C08G63/823 ,  C08G63/87 ,  C08G64/30

公开(公告)号：EP2545104A4

公开(公告)日：2013-08-14

申请号：EP11753516

申请日：2011-03-09

申请人： RICOH CO LTD

发明人： TANAKA CHIAKI ,  INOUE RYOTA ,  NEMOTO TAICHI ,  YAMAUCHI YOSHITAKA

IPC分类号： C08J3/12 ,  B01J2/02 ,  B29B9/10 ,  G03G9/087

CPC分类号： G03G9/0806 ,  C08J3/12 ,  C08J3/226 ,  C08J2331/00 ,  G03G9/0804 ,  G03G9/0808 ,  G03G9/081

公开(公告)号：EP3286607A1

公开(公告)日：2018-02-28

申请号：EP16782758

申请日：2016-03-24

申请人： RICOH CO LTD

发明人： YAMAUCHI YOSHITAKA ,  SUZUKI KAZUMI ,  NAKAJIMA HISASHI ,  YAMADA SAORI ,  NAITO YU ,  KANEKO AKIHIRO

IPC分类号： G03G9/087

CPC分类号： G03G9/08795 ,  G03G9/0821 ,  G03G9/0825 ,  G03G9/08797

摘要： PROBLEM TO BE SOLVED: To provide toner excellent in low-temperature fixability, heat-resistant storage property, and stress proofness.SOLUTION: Toner is characterized in that in an X-ray diffraction measurement, a diffraction peak exists at a position of at least 2θ=20° to 25°, and each difference among respective glass transition temperatures to be observed after subjected to heating and cooling under a following temperature rise/fall condition 1 and temperature rise/fall condition 2 using a DSC falls within 10°C. The temperature rise/fall condition 1: Let a start temperature be 20°C, the temperature rises up to 120°C at 10°C/min, is kept at 120°C for 10 minutes, falls down to 0°C at 10°C/min, and rises up to 150°C at 10°C/min without holding time at 0°C. The temperature rise/fall condition 2: Let a start temperature be 20°C, the temperature rises up to 120°C at 10°C/min, is kept at 120°C for 10 minutes, falls down to 0°C at 10°C/min, rises up to 45°C at 10°C/min without holding time at 0°C, and is kept for 24 hours, again falls down to 0°C at 10°C/min, and rises up to 150°C at 10°C/min without holding time at 0°C.SELECTED DRAWING: None

公开(公告)号：EP2365016B1

公开(公告)日：2017-05-03

申请号：EP11157159

申请日：2011-03-07

申请人： RICOH CO LTD

发明人： NEMOTO TAICHI ,  MASE NOBUYUKI ,  SAKO TAKESHI ,  OKAJIMA IDZUMI ,  MORI SHUNSUKE ,  TANAKA CHIAKI ,  YAMAUCHI YOSHITAKA ,  ISHIDUKA JYUN

IPC分类号： C08G64/02 ,  C08G63/08 ,  C08G63/81 ,  C08G63/82 ,  C08G64/20 ,  C08G64/38

CPC分类号： C08G63/823 ,  C08G63/08 ,  C08G63/81 ,  C08G64/0208 ,  C08G64/20 ,  C08G64/38

公开(公告)号：EP2825917A4

公开(公告)日：2015-03-25

申请号：EP13761618

申请日：2013-03-07

申请人： RICOH CO LTD

发明人： TAKAHASHI RINTARO ,  MORITA TATSUYA ,  SUZUKI KAZUMI ,  SAKASHITA SHINGO ,  SHIBA MASANA ,  NEMOTO TAICHI ,  YAMAUCHI YOSHITAKA ,  MIYAAKE AZUMI

IPC分类号： G03G9/08 ,  G03G9/087 ,  G03G15/08

CPC分类号： G03G9/0825 ,  G03G9/0821 ,  G03G9/08755 ,  G03G9/08757 ,  G03G9/08764 ,  G03G9/08788 ,  G03G9/08795 ,  G03G9/08797 ,  G03G15/08

摘要： A toner, including: a crystalline resin; a non-crystalline resin; and a colorant, wherein the toner has a sea-island structure which includes a sea containing the crystalline resin and an island containing the non-crystalline resin and the colorant, wherein the island is 1.0 μm or less in domain diameter, and wherein the toner is 1.7×104 Pa or less in storage elastic modulus at 160° C.

摘要翻译： 一种调色剂，包括：结晶树脂; 非结晶树脂; 和着色剂，其中调色剂具有海岛结构，其包含含有结晶树脂的海和含有非结晶性树脂和着色剂的岛，其中岛的直径为1.0μm以下，并且其中调色剂 在160℃下的储能弹性模量为1.7×10 4 Pa以下

公开(公告)号：EP3286607A4

公开(公告)日：2018-04-11

申请号：EP16782758

申请日：2016-03-24

申请人： RICOH CO LTD

发明人： YAMAUCHI YOSHITAKA ,  SUZUKI KAZUMI ,  NAKAJIMA HISASHI ,  YAMADA SAORI ,  NAITO YU ,  KANEKO AKIHIRO

IPC分类号： G03G9/087

CPC分类号： G03G9/08795 ,  G03G9/08711 ,  G03G9/08755 ,  G03G9/08797

摘要： PROBLEM TO BE SOLVED: To provide toner excellent in low-temperature fixability, heat-resistant storage property, and stress proofness.SOLUTION: Toner is characterized in that in an X-ray diffraction measurement, a diffraction peak exists at a position of at least 2θ=20° to 25°, and each difference among respective glass transition temperatures to be observed after subjected to heating and cooling under a following temperature rise/fall condition 1 and temperature rise/fall condition 2 using a DSC falls within 10°C. The temperature rise/fall condition 1: Let a start temperature be 20°C, the temperature rises up to 120°C at 10°C/min, is kept at 120°C for 10 minutes, falls down to 0°C at 10°C/min, and rises up to 150°C at 10°C/min without holding time at 0°C. The temperature rise/fall condition 2: Let a start temperature be 20°C, the temperature rises up to 120°C at 10°C/min, is kept at 120°C for 10 minutes, falls down to 0°C at 10°C/min, rises up to 45°C at 10°C/min without holding time at 0°C, and is kept for 24 hours, again falls down to 0°C at 10°C/min, and rises up to 150°C at 10°C/min without holding time at 0°C.SELECTED DRAWING: None

公开(公告)号：EP3095009A4

公开(公告)日：2016-11-23

申请号：EP15737477

申请日：2015-01-06

申请人： RICOH CO LTD

发明人： NAKAJIMA HISASHI ,  SUZUKI KAZUMI ,  NAGAYAMA MASASHI ,  YAMADA SAORI ,  YAMAUCHI YOSHITAKA ,  NAITO YU ,  SEKIGUCHI YOSHITAKA

IPC分类号： G03G9/08 ,  G03G9/087 ,  G03G9/097 ,  G03G9/10 ,  G03G15/01

CPC分类号： G03G15/0121 ,  G03G9/08711 ,  G03G9/08731 ,  G03G9/08755 ,  G03G9/08782 ,  G03G9/08795 ,  G03G9/08797 ,  G03G9/09708 ,  G03G15/01 ,  G03G21/18

摘要： A toner for electrophotography, which contains a binder resin, and a release agent, wherein a maximum value of loss tangent of the toner at 95° C. to 115° C. is 8 or greater, as a viscoelasticity of the toner is measured, where the loss tangent is represented by the following formula: Loss tangent (tan δ)=loss elastic modulus (G″)/storage elastic modulus (G′).

摘要翻译： 测量包含粘合剂树脂的电子照相用调色剂和脱模剂，其中调色剂在95℃至115℃下的最大损耗角正切值为8或更大，作为调色剂的粘弹性， 其中损耗角正切由下式表示：损耗角正切（tanδ）=损耗弹性模量（G“）/储能弹性模量（G'）。