公开(公告)号：US20240210847A1

公开(公告)日：2024-06-27

申请号：US18536261

申请日：2023-12-12

申请人： Shoki MATSUDA ,  Keisuke TADA ,  Yasuyuki SANUI

发明人： Shoki MATSUDA ,  Keisuke TADA ,  Yasuyuki SANUI

IPC分类号： G03G9/08 ,  G03G9/09 ,  G03G15/08 ,  G03G15/16 ,  G03G21/18

CPC分类号： G03G9/0821 ,  G03G9/09 ,  G03G15/08 ,  G03G15/1605 ,  G03G21/1807 ,  G03G21/0011

摘要： Yellow toner with excellent cleanability, transferability and device contamination resistance is provided. When intensity of spectrum at wavenumber λ, at which total intensity of Raman spectrums of toner particles from 950 cm−1 through 3,250 cm−1 in Raman spectroscopy of toner is maximum, is normalized to 1, and distribution is generated for ≥300 particles regarding LC calculated by [LC (%)=CH5 rate (%)−CHc rate (%)] based on CHc rate (%) defined as [(Inc−Iave)/Iave]×100 and CHs rate (%) defined as [(Ins−Iave)/Iave]×100 where In and Ins represent integrated intensities of spectrums of center and surface portions of each particle from 2,750 cm−1 through 3,250 cm−1, and Iave represents average of Inc and Ins of all particles, percentage by number of particles having LC deviating from LC distribution median by absolute value of ≥25.0; is ≥1.0% by number and ≤25.0% by number.

公开(公告)号：US20200209772A1

公开(公告)日：2020-07-02

申请号：US16728042

申请日：2019-12-27

申请人： Hiyori FUJINO ,  Shoki MATSUDA ,  Fumihiko CHIMOTO ,  Keisuke TADA ,  Daisuke MISAWA

发明人： Hiyori FUJINO ,  Shoki MATSUDA ,  Fumihiko CHIMOTO ,  Keisuke TADA ,  Daisuke MISAWA

IPC分类号： G03G9/09 ,  G03G9/087 ,  G03G15/08 ,  G03G15/20

摘要： A yellow toner is provided. The yellow toner comprises toner particles each comprising a binder resin and a colorant, and 1.0% to 15.0% by number of the toner particles have a CH rate of 25.0% or more in absolute value. Here, the CH rate is calculated from the following formula (1): CH rate (%)=[(In−Iave)/Iave]×100  Formula (1) where In represents an integrated intensity within a wavenumber region of from 2,750 to 3,250 cm−1 when an intensity at a wavenumber λ within a wavenumber region of from 950 to 3,250 cm−1 is normalized to 1 in a Raman spectrum of each toner particle; and Iave represents an average of the In.