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：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'）。