TONER AND IMAGE FORMING METHOD
PROBLEM TO BE SOLVED: To provide a toner having good cleaning property, hardly inducing uneven abrasion on a photoreceptor surface, and capable of reducing contamination of a charging member.SOLUTION: The toner includes toner particles and organic-inorganic composite fine particles on a surface of t...
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Main Authors | , , , , , |
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Format | Patent |
Language | English Japanese |
Published |
12.03.2015
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Subjects | |
Online Access | Get full text |
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Summary: | PROBLEM TO BE SOLVED: To provide a toner having good cleaning property, hardly inducing uneven abrasion on a photoreceptor surface, and capable of reducing contamination of a charging member.SOLUTION: The toner includes toner particles and organic-inorganic composite fine particles on a surface of the toner particle. Each of the organic-inorganic composite fine particles is a particle in which inorganic fine particles are exposed on a surface of a vinyl resin particle in such a way that projections derived from the inorganic fine particles are formed on the surface. An abundance ratio of the inorganic fine particles on the surfaces of the organic-inorganic composite fine particles is 20% or more and 70% or less. The toner has an average circularity of 0.960 or more, and the toner satisfies the condition of 0.003≤F/Q≤0.040, where Q (mC/kg) is an absolute value of a triboelectric charge amount of the toner measured by a two-component method and F (nN) is an electrostatic adhesive force of the toner to a polycarbonate plate.
【課題】 良好なクリーニング性を有し、且つ感光体表面の摩耗ムラを引き起こしにくく、且つ帯電部材の汚染を軽減できるトナーを提供することである。【解決手段】 トナー粒子及び、該トナー粒子の表面に有機無機複合微粒子を有するトナーであって、該有機無機複合微粒子は、無機微粒子由来の凸部が表面に形成されるように、ビニル系樹脂粒子の表面に無機微粒子が露出した粒子であって、該有機無機複合微粒子の表面の該無機微粒子による存在率が20%以上70%以下であり、該トナーの平均円形度が0.960以上であり、該トナーの2成分法で測定される摩擦帯電量の絶対値をQ(mC/kg)とし、該トナーのポリカーボネート平板との静電付着力をF(nN)としたとき、該トナーが、下記条件0.003 F/Q2 0.040を満足することを特徴とするトナーに関する。【選択図】 なし |
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Bibliography: | Application Number: JP20140157085 |