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公开(公告)号：US12032332B2
公开(公告)日：2024-07-09
申请号：US17174382
申请日：2021-02-12
申请人： RICOH COMPANY, LTD.
发明人： Hiyori Fujino , Keisuke Tada , Shoki Matsuda , Fumihiko Chimoto , Takashi Okano , Ayumi Satoh
CPC分类号： G03G9/08755 , G03G9/0906 , G03G9/0926 , G03G15/0865 , G03G15/2064
摘要： A magenta toner is provided. The magenta toner comprises toner particles each comprising a binder resin and a colorant. From 1.0% to 25.0% by number of the toner particles have a CH rate of 25.0% or more in absolute value. The CH rate is calculated from the following formula (1):
CH rate(%)=[(In−Iave)/Iave]×100 Formula (1)
where, in a Raman spectrum of each toner particle, 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 1,200 to 3,250 cm−1 is s normalized to 1, where a total intensity of all the toner particles is maximum at the wavenumber λ; and Iave represents an average of the In.-
2.发明授权公开(公告)号：US11841679B2
公开(公告)日：2023-12-12
申请号：US17336866
申请日：2021-06-02
申请人： RICOH COMPANY, LTD.
发明人： Hiyori Fujino , Keisuke Tada , Shoki Matsuda , Fumihiko Chimoto , Ayumi Satoh
CPC分类号： G03G9/0821 , G03G9/08711 , G03G9/08755 , G03G15/0121
摘要： A cyan toner is provided. The cyan toner comprises toner particles each comprising a binder resin and a colorant. From 1.0% to 20.0% by number of the toner particles have a CH rate of 7.0% or more in absolute value. The CH rate is calculated from the following formula (1):
CH rate (%)=[(In−Iave)/Iave]×100 Formula (1)
where, in a Raman spectrum of each toner particle, In represents an integrated intensity within a wavenumber region of from 2,600 to 3,180 cm−1 when an intensity at a wavenumber λ within a wavenumber region of from 2,600 to 2,800 cm−1 is s normalized to 1, where a total intensity of all the toner particles is maximum at the wavenumber λ; and Iave represents an average of the In.
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