发明名称 Toner and developer, and image forming apparatus, image forming method and process cartridge
摘要 Provided is a toner that comprises a binder resin, a releasing agent, and a colorant, wherein the mass average particle diameter of the toner is 3 μm to 8 μm, the content of particles having a particle diameter of no more than 5 μm is from 60% by number to 90% by number, the binder resin comprises a polyester resin (A) having a softening temperature Tm(A) from no lower than 120° C. to no higher than 160° C. and a polyester resin (B) having a softening temperature Tm(B) from no lower than 80° C. to lower than 120° C., and at least one of the polyester resins (A) and (B) is prepared by condensation polymerization between an alcohol component and a carboxylic acid component, and the alcohol component comprises divalent alcohol of 1,2-propanediol in a content of no less than 65% by mole and consists substantially of aliphatic alcohol; and also provided is a developer that comprises the toner and a carrier.
申请公布号 US7862973(B2) 申请公布日期 2011.01.04
申请号 US20070943972 申请日期 2007.11.21
申请人 RICOH COMPANY, LTD. 发明人 NAKAYAMA SHINYA;KOTSUGAI AKIHIRO;IWAMOTO YASUAKI;SHITARA YASUTADA;WATANABE YOHICHIROH
分类号 G03G9/00 主分类号 G03G9/00
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