发明名称 Toner and development agent, image forming apparatus, and process cartridge using the same
摘要 A toner includes a coloring agent, a binder resin comprising a crystalline resin having a urethane skeleton and/or urea skeleton, and a releasing agent (a microcrystalline wax). A development agent, a process cartridge, and an image forming apparatus employ the toner to form images on recording media electrophotographically.
申请公布号 US8808955(B2) 申请公布日期 2014.08.19
申请号 US201213608143 申请日期 2012.09.10
申请人 Ricoh Company, Ltd. 发明人 Nakayama Shinya;Yamamoto Atsushi;Santo Hideyuki;Yamashita Daiki;Amemori Suzuka;Yamada Masahide
分类号 G03G9/08 主分类号 G03G9/08
代理机构 Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P. 代理人 Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
主权项 1. A toner comprising: a coloring agent; a binder resin comprising an amount of 50% by weight or more of a crystalline resin having a urethane skeleton and/or urea skeleton; and a releasing agent comprising a microcrystalline wax wherein, in a diffraction spectrum of the toner obtained by X-ray diffraction, a ratio of C/(A+C) is 0.15 or greater, where C represents an integrated intensity of a spectrum deriving from a crystalline structure and A represents an integrated intensity of a spectrum deriving from a non-crystalline structure.
地址 Tokyo JP