Oblon, McClelland, Maier & Neustadt, L.L.P.
Toner, development agent, image forming apparatus, and process cartridge
Toner contains a binder resin containing a crystalline resin having a urethane and/or urea bonding; and a colorant, wherein in a diffraction spectrum of the toner as measured by an X-ray diffraction instrument, a ratio {C/(C+A)} of an integral intensity C of the spectrum derived from the crystalline structure to an integral intensity A of the spectrum derived from the non-crystalline structure is 0.12 or greater, wherein the toner satisfies the following relation 1: T1−T2≦30° C. (Relation 1), where T1 represents the maximum endothermic peak in the first temperature rising from 0° C. to 100° C. at the temperature rising rate of 10° C./min and T2 represents the maximum exothermic peak in the first temperature falling from 100° C. to 0° C. at the temperature falling rate of 10° C./min as T1 and T2 are measured by diffraction scanning calorimetry (DSC).
Ricoh Company, Ltd.
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Keiji Susumu Toyoshi Tatsuya Shinya Atsushi Satoyuki Minoru Masahide Kohsuke Hiroshi
Makabe Chiba Sawada Morita Nakayama Yamamoto Sekiguchi Masuda Yamada Nagata Yamashita