US 12,393,131 B2
Toner
Takashi Kenmoku, Mishima (JP); Kenta Kamikura, Yokohama (JP); and Yuzo Seino, Gotemba (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 16, 2022, as Appl. No. 17/655,127.
Application 17/655,127 is a continuation of application No. 16/935,254, filed on Jul. 22, 2020, granted, now 11,314,178.
Claims priority of application No. 2019-137253 (JP), filed on Jul. 25, 2019.
Prior Publication US 2022/0214629 A1, Jul. 7, 2022
Int. Cl. G03G 15/08 (2006.01); G03G 9/08 (2006.01); G03G 9/087 (2006.01); G03G 9/097 (2006.01); G03G 21/18 (2006.01)
CPC G03G 9/0823 (2013.01) [G03G 9/0819 (2013.01); G03G 9/0825 (2013.01); G03G 9/0827 (2013.01); G03G 9/08711 (2013.01); G03G 9/08773 (2013.01); G03G 9/09708 (2013.01); G03G 15/0877 (2013.01); G03G 21/1814 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A toner, comprising:
a toner particle comprising a binder resin, wherein
when measuring impedances in accordance with a series of impedance measurements including the steps of:
(i) preparing a first treated sample by leaving the toner under an environment of a temperature of 30° C. and relative humidity of 50% for 20 minutes;
(ii) measuring an impedance of the first treated sample under an environment of a temperature of 30° C. and relative humidity of 50% while varying a frequency from 100 kHz to 0.0215 Hz;
(iii) preparing a second treated sample by leaving the first treated sample for 20 minutes under an environment of a temperature of 50° C. and relative humidity of 50%;
(iv) measuring an impedance of the second treated sample under environment of a temperature of 50° C. and a relative humidity of 50% while varying a frequency from 100 kHz to 0.0215 Hz;
(v) preparing a third treated sample by leaving the second treated sample for 20 minutes under an environment of a temperature of 30° C. and relative humidity of 50%; and
(vi) measuring an impedance of the third treated sample under environment of a temperature of 30° C. and a relative humidity of 50% while varying a frequency from 100 kHz to 0.0215 Hz,
0.015≤tan δ50° C.(1)≤0.050 and 0.25≤tan δ30° C.(2)/tan δ50° C.(1)≤0.66
when tan δ50° C. (1) is a dielectric loss tangent at a frequency of 10 kHz calculated from the impedance measured in step (iv) and tan δ30° C. (2) is a dielectric loss tangent at a frequency of 10 kHz calculated from the impedance measured in step (vi).