JP2006030455A5 - - Google Patents

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JP2006030455A5
JP2006030455A5 JP2004207198A JP2004207198A JP2006030455A5 JP 2006030455 A5 JP2006030455 A5 JP 2006030455A5 JP 2004207198 A JP2004207198 A JP 2004207198A JP 2004207198 A JP2004207198 A JP 2004207198A JP 2006030455 A5 JP2006030455 A5 JP 2006030455A5
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particles
developing method
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coating layer
resin coating
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JP2004207198A
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JP2006030455A (en
JP4324040B2 (en
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Claims (8)

現像剤を現像剤担持体に担持させ、静電潜像担持体に対向する現像領域へ搬送し、該現像剤担持体に断続的に休止する交流成分を直流成分に重畳した電圧を現像バイアスとして印加し、静電潜像担持体上の潜像を可視像化する現像方法において、
該現像剤担持体が、少なくとも基体及び該基体上に形成された樹脂被覆層を有し、
該樹脂被覆層が、体積平均粒径３．０〜９．０μｍである、該樹脂被覆層の表面に凹凸を付与するための凹凸付与粒子、及び黒鉛化度Ｐ（００２）が０．２０≦Ｐ（００２）≦０．９５であり且つ体積平均粒径が０．５〜４．０μｍである、導電性を付与するための黒鉛化粒子を少なくとも含有し、且つ
該樹脂被覆層中に含有される粒子の体積粒度分布において、体積粒径１０μｍ以上である粒子の存在比率が５．０％以下である現像剤担持体であることを特徴とする現像方法。 The developer is carried on the developer carrying member, and conveyed to the developing region facing the latent electrostatic image bearing member, a voltage obtained by superposing an AC component on a DC component to pause intermittently to said developer carrying member as the developing bias applying to the latent image on the electrostatic latent image bearing member in the current image how turn into a visible image,
The developer carrying member has a resin coating layer formed on at least a substrate and said substrate,
The resin coating layer has a volume average particle size of 3.0 to 9.0 μm, and the unevenness imparting particles for imparting irregularities to the surface of the resin coating layer, and the degree of graphitization P (002) is 0.20 ≦ P (002) ≦ 0.95 and having a volume average particle diameter of 0.5 to 4.0 μm, and containing at least graphitized particles for imparting conductivity, and
A developing method characterized in that in the volume particle size distribution of particles contained in the resin coating layer, a developer carrier having an abundance ratio of particles having a volume particle size of 10 μm or more is 5.0% or less . 前記黒鉛化粒子の体積平均粒径と黒鉛化度Ｐ（００２）との関係が下記式（Ａ）、（Ｂ）を満たすことを特徴とする請求項１に記載の現像方法。
−0.0464Ｌｎ（Ｘ）＋0.3143≦Ｙ≦−0.0464Ｌｎ（Ｘ）＋0.7643 （Ａ）
０．５≦Ｘ≦４．０ （Ｂ）
（式中、Ｘは黒鉛化粒子の体積平均粒径（μｍ）、Ｙは黒鉛化粒子の黒鉛化度Ｐ（００２）） 2. The developing method according to claim 1, wherein the relationship between the volume average particle diameter of the graphitized particles and the degree of graphitization P (002) satisfies the following formulas (A) and (B).
−0.0464Ln (X) + 0.3143 ≦ Y ≦ −0.0464Ln (X) +0.7643 (A)
0.5 ≦ X ≦ 4.0 (B)
(Wherein, X is the volume average particle size (μm) of the graphitized particles, Y is the graphitization degree P (002) of the graphitized particles) 前記黒鉛化粒子の体積平均粒径は、前記凹凸付与粒子の体積平均粒径より小さいことを特徴とする請求項１又は２に記載の現像方法。 The developing method according to claim 1, wherein a volume average particle diameter of the graphitized particles is smaller than a volume average particle diameter of the unevenness imparting particles. 前記黒鉛化粒子はバルクメソフェーズピッチを黒鉛化して得られたものであることを特徴とする請求項１〜３のいずれか一項に記載の現像方法。 The developing method according to claim 1, wherein the graphitized particles are obtained by graphitizing bulk mesophase pitch. 前記黒鉛化粒子はメソカーボンマイクロビーズを黒鉛化して得られたものであることを特徴とする請求項１〜３のいずれか一項に記載の現像方法。 Developing method according to claim 1, wherein the graphitized particles are those obtained by graphitizing mesocarbon beads. 前記樹脂被覆層は、更に第四級アンモニウム塩化合物を含有することを特徴とする請求項１〜５のいずれか一項に記載の現像方法。 The developing method according to claim 1, wherein the resin coating layer further contains a quaternary ammonium salt compound. 前記第四級アンモニウム塩化合物は、少なくとも鉄粉に対して正帯電性であり、且つ前記樹脂被覆層は、構造中に少なくとも−ＮＨ２基、＝ＮＨ基又は−ＮＨ−結合のいずれかを有する含窒素樹脂を含有することを特徴とする請求項６に記載の現像方法。 The quaternary ammonium salt compound is positively charged at least with respect to iron powder, and the resin coating layer has at least one of —NH 2 group, ═NH group or —NH— bond in the structure. The developing method according to claim 6, comprising a nitrogen-containing resin. 前記現像剤は非磁性一成分系現像剤であり、該非磁性一成分系現像剤は下記式（Ｃ）、（Ｄ）より求められる平均円形度が０．９３５以上の現像剤であることを特徴とする請求項１乃至７の何れかに記載の現像方法。
円形度ａ＝Ｌ０／Ｌ （Ｃ）
（式中、Ｌ０は粒子像と同じ投影面積を持つ円の周囲長を示し、Ｌは粒子像の周囲長を示す。）
Figure 2006030455
 （式中、平均円形度をａａｖｅ、各粒子における円形度をａｉ、測定粒子数をｍとして示す。）。 The developer is a non-magnetic one-component developer, and the non-magnetic one-component developer is a developer having an average circularity of 0.935 or more obtained from the following formulas (C) and (D). The developing method according to claim 1 .
Circularity a = L 0 / L (C)
(In the formula, L 0 represents the circumference of a circle having the same projected area as the particle image, and L represents the circumference of the particle image.)
Figure 2006030455
 (In the formula, the average circularity is a ave , the circularity of each particle is a i , and the number of measured particles is m) .
JP2004207198A 2004-07-14 2004-07-14 Development method Expired - Fee Related JP4324040B2 (en)

Priority Applications (1)

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JP2004207198A JP4324040B2 (en) 2004-07-14 2004-07-14 Development method

Publications (3)

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JP2006030455A JP2006030455A (en) 2006-02-02
JP2006030455A5 true JP2006030455A5 (en) 2007-08-23
JP4324040B2 JP4324040B2 (en) 2009-09-02

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008096870A (en) * 2006-10-16 2008-04-24 Konica Minolta Business Technologies Inc Developing roller
JP2009058865A (en) * 2007-09-03 2009-03-19 Konica Minolta Business Technologies Inc Manufacturing method of electrophotographic developing roller, and the electrophotographic developing roller

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