JP2010160367A5 - - Google Patents

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JP2010160367A5
JP2010160367A5 JP2009003098A JP2009003098A JP2010160367A5 JP 2010160367 A5 JP2010160367 A5 JP 2010160367A5 JP 2009003098 A JP2009003098 A JP 2009003098A JP 2009003098 A JP2009003098 A JP 2009003098A JP 2010160367 A5 JP2010160367 A5 JP 2010160367A5
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toner
inorganic fine
fine particles
khz
dielectric constant
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JP2010160367A (en
JP5305927B2 (en
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上記目的を達成するため、本発明者らは、トナーカートリッジにおけるトナー容器の成型用樹脂組成と、トナーに本発明の特殊な無機微粉体を含有させることによりトナーの定量排出性及び現像部でのトナーの均一帯電性を高度に達成することができることを見出した。すなわち本発明は以下の通りである。
(1) なくともトナーとトナーを収容するトナー容器により構成され、且つ画像形成装置に着脱可能なトナーカートリッジにおいて、
該トナー容器は、少なくとも芳香族ジカルボン酸とアルキレングリコールを重合して得られるポリエステルとカーボンブラックを含有した成型用樹脂を、延伸ブロー法により成型したトナー容器であり、
該トナーは、少なくとも結着樹脂及び着色剤を含有するトナー粒子と、個数平均粒子径80nm以上400nm以下であり、体積固有抵抗値が1.0×103Ω・m以上1.0×109Ω・m以下である無機微粒子を有することを特徴とするトナーカートリッジ。
(2) 該無機微粉粒形状が、8個の三角形で囲まれた凸多面体である八面体、及び/又は6個の四角形で囲まれた凸多面体である六面体であることを特徴とするトナーカートリッジ。
(3) 該無機微粒子は、疎水化処理されていることを特徴とするトナーカートリッジ。
(4) 該成型用樹脂は、40℃,2kHzにおける誘電率ε(C)が2.8pF/m以上3.8pF/m未満であり、該無機微粒子の、40℃,2kHzにおける誘電率ε(A)が、下記式(1)
30.0<ε(A)/ε(C)<150.0 (1)
を満足することを特徴とするトナーカートリッジ。
(5) 該トナーの40℃,2kHzにおける誘電率ε(T)が、30.0pF/m以上80.0pF/m以下であることを特徴とするトナーカートリッジ。
In order to achieve the above object, the present inventors have developed a resin composition for molding a toner container in a toner cartridge, and the toner contains a special inorganic fine powder according to the present invention, so that the toner can be discharged in a fixed amount and in the developing section. It has been found that uniform chargeability of the toner can be achieved to a high degree. That is, the present invention is as follows.
(1) even without least is constituted by a toner container for storing toner and a toner, and a toner cartridge detachably mountable to an image forming apparatus,
The toner container is a toner container obtained by molding a molding resin containing at least a polyester obtained by polymerizing an aromatic dicarboxylic acid and an alkylene glycol and carbon black by a stretch blow method,
The toner has toner particles containing at least a binder resin and a colorant, a number average particle diameter of 80 nm to 400 nm, and a volume resistivity value of 1.0 × 10 3 Ω · m to 1.0 × 10 9. A toner cartridge having inorganic fine particles of Ω · m or less.
(2) wherein the shape of the inorganic fine granular child, eight octahedral a convex polyhedron enclosed by a triangle, and / or a hexahedral der Rukoto a convex polyhedron surrounded by six rectangles Toner cartridge.
(3) inorganic fine particles, the toner cartridge being characterized in that hydrophobized.
(4) molded type resin for, 40 ° C., the dielectric constant epsilon (C) is less than 2.8 pF / m or more 3.8pF / m at 2 kHz, the inorganic fine particles, 40 ° C., dielectric constant at 2 kHz epsilon (A) is represented by the following formula (1)
30.0 <ε (A) / ε (C) <150.0 (1)
A toner cartridge characterized by satisfying
(5) A toner cartridge wherein the toner has a dielectric constant ε (T) at 40 ° C. and 2 kHz of 30.0 pF / m or more and 80.0 pF / m or less.

本発明のトナーカートリッジは、画像形成装置に着脱可能で、少なくともトナーとトナーを収容するトナー容器により構成される。さらに、該トナー容器が、特定の成型用樹脂を延伸ブロー法により成型し、内蔵するトナーは、結着樹脂及び着色剤を含有するトナー粒子と、個数平均粒子径80nm以上400nm以下で、体積固有抵抗値が1.0×103Ω・m以上1.0×109Ω・m以下である無機微粒子を有するものである。これにより、トナー保管時及び補給動作時においてもトナー容器とトナーからなる過度の摩擦帯電を引き起こさず、トナーの静電凝集の発生がなくトナーの定量排出性を極度に達成することができ、更には現像部への到達時においてトナーの帯電ムラを発生させることなく現像工程での不具合を抑制できる。 The toner cartridge of the present invention is detachable from the image forming apparatus, and includes at least a toner container that contains toner. Further, the toner container is formed by molding a specific molding resin by the stretch blow method, and the toner incorporated therein is a toner particle containing a binder resin and a colorant, and a number average particle diameter of 80 nm to 400 nm, which is specific to the volume. It has inorganic fine particles having a resistance value of 1.0 × 10 3 Ω · m or more and 1.0 × 10 9 Ω · m or less. As a result, excessive frictional charging consisting of the toner container and the toner does not occur during toner storage and replenishment operation, toner electrostatic aggregation does not occur, and toner quantitative discharge performance can be extremely achieved. Can suppress problems in the developing process without causing uneven charging of the toner when it reaches the developing portion.

つまり本発明は、トナー容器が、少なくとも芳香族ジカルボン酸とアルキレングリコールを重合して得られるポリエステルとカーボンブラックを含有した成型用樹脂を、延伸ブロー法により成型したトナー容器であり、一方、内蔵するトナーは、少なくとも結着樹脂及び着色剤を含有するトナー粒子と、個数平均粒子径80nm以上400nm以下であり、体積固有抵抗値が1.0×103Ω・m以上1.0×109Ω・m以下である無機微粉体(無機微粒子)を有することを特徴とするトナーカートリッジに関する。 That is, the present invention is a toner container in which a molding resin containing at least a polyester obtained by polymerizing an aromatic dicarboxylic acid and an alkylene glycol and carbon black is molded by a stretch blow method. The toner has toner particles containing at least a binder resin and a colorant, a number average particle diameter of 80 nm to 400 nm, and a volume resistivity of 1.0 × 10 3 Ω · m to 1.0 × 10 9 Ω. The present invention relates to a toner cartridge having inorganic fine powder (inorganic fine particles) having a size of m or less.

また、該トナーは少なくとも結着樹脂及び着色剤を含有するトナー粒子と、個数平均粒子径80nm以上400nm以下(好ましくは90nm以上250nm以下)であり、体積固有抵抗値が1.0×103Ω・m以上1.0×109Ω・m以下である無機微粉体を有することを特徴とする。 The toner has toner particles containing at least a binder resin and a colorant, a number average particle diameter of 80 nm to 400 nm (preferably 90 nm to 250 nm), and a volume resistivity of 1.0 × 10 3 Ω. -It has the inorganic fine powder which is m or more and 1.0 * 10 < 9 > (omega | ohm) * m or less.

一方、体積固有抵抗値が1.0×103Ω・m未満である場合、トナー母体が本来有している電荷がリークしトナー母体の帯電量不足となり十分な現像性が得られない。1.0×109Ω・m以上である場合、トナー容器内での攪拌、搬送工程においてトナーの局部的なチャージアップ現象が発生し現像ムラが発生する。 On the other hand, when the volume resistivity is less than 1.0 × 10 3 Ω · m , the charge inherent to the toner base leaks, and the charge amount of the toner base becomes insufficient, so that sufficient developability cannot be obtained. When the density is 1.0 × 10 9 Ω · m or more, local charge-up phenomenon of toner occurs in the stirring and conveying process in the toner container, and development unevenness occurs.

Claims (5)

なくともトナーとトナーを収容するトナー容器により構成され、且つ画像形成装置に着脱可能なトナーカートリッジにおいて、
該トナー容器は、少なくとも芳香族ジカルボン酸とアルキレングリコールを重合して得られるポリエステルとカーボンブラックを含有した成型用樹脂を、延伸ブロー法により成型したトナー容器であり、
該トナーは、少なくとも結着樹脂及び着色剤を含有するトナー粒子と、個数平均粒子径80nm以上400nm以下であり、体積固有抵抗値が1.0×103Ω・m以上1.0×109Ω・m以下である無機微粒子を有することを特徴とするトナーカートリッジ。
Even without least it is constituted by a toner container for storing toner and a toner, and a toner cartridge detachably mountable to an image forming apparatus,
The toner container is a toner container obtained by molding a molding resin containing at least a polyester obtained by polymerizing an aromatic dicarboxylic acid and an alkylene glycol and carbon black by a stretch blow method,
The toner has toner particles containing at least a binder resin and a colorant, a number average particle diameter of 80 nm to 400 nm, and a volume resistivity value of 1.0 × 10 3 Ω · m to 1.0 × 10 9. A toner cartridge having inorganic fine particles of Ω · m or less.
該無機微粒形状が、8個の三角形で囲まれた凸多面体である八面体、及び/又は6個の四角形で囲まれた凸多面体である六面体であることを特徴とする請求項1に記載のトナーカートリッジ。 Claim the shape of the inorganic fine particles, characterized eight octahedral a convex polyhedron enclosed by a triangle, and / or a hexahedral der Rukoto a convex polyhedron surrounded by six rectangles 1 The toner cartridge according to 1. 該無機微粒子は、疎水化処理されていることを特徴とする請求項1又は2に記載のトナーカートリッジ。 Inorganic fine particles, the toner cartridge according to claim 2, characterized in that the hydrophobic treatment. 該成型用樹脂は、40℃,2kHzにおける誘電率ε(C)が2.8pF/m以上3.8pF/m未満であり、該無機微粒子の、40℃,2kHzにおける誘電率ε(A)が、下記式(1)
30.0<ε(A)/ε(C)<150.0 (1)
を満足することを特徴とする請求項1乃至3の何れかに1項に記載のトナーカートリッジ。
Molded type resin is, 40 ° C., the dielectric constant epsilon (C) is less than 2.8 pF / m or more 3.8pF / m at 2 kHz, the inorganic fine particles, 40 ° C., dielectric constant at 2 kHz epsilon (A) Is the following formula (1)
30.0 <ε (A) / ε (C) <150.0 (1)
The toner cartridge according to item 1 to any one of claims 1 to 3, characterized by satisfying the.
該トナーの40℃,2kHzにおける誘電率ε(T)が、30.0pF/m以上80.0pF/m以下であることを特徴とする請求項1乃至4の何れかに1項に記載のトナーカートリッジ。 40 ° C. of the toner, the dielectric constant at 2 kHz epsilon is (T), the toner according to item 1 to any one of claims 1 to 4, characterized in that at most 30.0pF / m or more 80.0pF / m cartridge.
JP2009003098A 2009-01-09 2009-01-09 Toner cartridge Active JP5305927B2 (en)

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