TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT, DEVELOPER, IMAGE FORMING APPARATUS, AND PROCESS CARTRIDGE
PROBLEM TO BE SOLVED: To provide toner for electrostatic image development including resin containing polylactic acid as binder resin, configured to solve the problem of colorant which is unlikely to be dispersed in a toner particle, which is specific to the polylactic acid, and to provide developer...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | PROBLEM TO BE SOLVED: To provide toner for electrostatic image development including resin containing polylactic acid as binder resin, configured to solve the problem of colorant which is unlikely to be dispersed in a toner particle, which is specific to the polylactic acid, and to provide developer using the toner, an image forming apparatus, and a process cartridge.SOLUTION: Toner contains resin having a polylactic acid skeleton. Colorant exists in an area inside an area located within 50nm closer to the center from an outer most surface of a base particle of the toner. An area ratio of the colorant in the inside area is 5% or more.
【課題】ポリ乳酸分を含む樹脂を結着樹脂に使用する静電像現像用トナーにおいて、ポリ乳酸特有の課題である、着色剤がトナー粒子内部に分散し難いという課題を解決し、並びに該トナーを用いた現像剤、画像形成装置及びプロセスカートリッジを提供すること。【解決手段】ポリ乳酸骨格を有する樹脂を含むトナーであって、該トナーの母体粒子の最表面からその中心部に向かって５０ｎｍ以内の領域よりもさらに内部の領域に着色剤が存在し、前記内部領域における着色剤の面積率が５％以上であることを特徴とするトナー。【選択図】図１ |
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