JP3055861B2 - Electrophotographic photoreceptor and electrophotographic apparatus provided with the electrophotographic photoreceptor - Google Patents

Electrophotographic photoreceptor and electrophotographic apparatus provided with the electrophotographic photoreceptor

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Publication number
JP3055861B2
JP3055861B2 JP6302715A JP30271594A JP3055861B2 JP 3055861 B2 JP3055861 B2 JP 3055861B2 JP 6302715 A JP6302715 A JP 6302715A JP 30271594 A JP30271594 A JP 30271594A JP 3055861 B2 JP3055861 B2 JP 3055861B2
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JP
Japan
Prior art keywords
layer
electrophotographic
photosensitive member
photoreceptor
coating layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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JP6302715A
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Japanese (ja)
Other versions
JPH08137120A (en
Inventor
まゆみ 木村
弘之 大森
達夫 前田
秀樹 穴山
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Canon Inc
Original Assignee
Canon Inc
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Priority to JP6302715A priority Critical patent/JP3055861B2/en
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Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【産業上の利用分野】本発明は電子写真感光体並びに該
電子写真感光体を備えた電子写真装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic photosensitive member and an electrophotographic apparatus provided with the electrophotographic photosensitive member.

【0002】[0002]

【従来の技術】従来より電子写真感光体として、酸化亜
鉛、硫化カドミウム等の無機光導電性物質を主成分とす
る感光層を有する無機感光体が広く用いられてきた。し
かし、熱安定性、耐湿性、耐久性、生産性等の面におい
て必ずしも満足できるものではない。一方、無機感光体
の持つ欠点を克服する目的で様々な有機光導電性物質を
主成分とする感光層を有する有機感光体の開発が盛んに
行われている。中でも、電荷発生物質と電荷輸送物質と
を組み合わせて用いる機能分離型の感光体は、有機光導
電性物質を用いた感光体の欠点である感度を大幅に向上
させることができ特に注目されている。
2. Description of the Related Art Conventionally, as an electrophotographic photosensitive member, an inorganic photosensitive member having a photosensitive layer mainly composed of an inorganic photoconductive substance such as zinc oxide and cadmium sulfide has been widely used. However, thermal stability, moisture resistance, durability, productivity, and the like are not always satisfactory. On the other hand, for the purpose of overcoming the drawbacks of the inorganic photoreceptor, organic photoreceptors having a photosensitive layer containing various organic photoconductive substances as main components have been actively developed. Above all, a function-separated type photoreceptor using a combination of a charge generating substance and a charge transporting substance is capable of significantly improving the sensitivity, which is a disadvantage of a photoreceptor using an organic photoconductive substance, and is particularly attracting attention. .

【0003】また、一般に電子写真感光体は支持体と支
持体上に形成された感光層とからなるが、支持体の欠陥
の被覆、感光層の塗工性向上、感光層と支持体の接着性
改良、感光層の電気的破壊に対する保護、帯電性の向
上、支持体から感光層への電荷注入性の改良等のために
感光層と支持体との間に中間層を設けることが有効であ
る。
In general, an electrophotographic photoreceptor comprises a support and a photosensitive layer formed on the support. The support covers defects of the support, improves coating properties of the photosensitive layer, and adheres the photosensitive layer to the support. It is effective to provide an intermediate layer between the photosensitive layer and the support to improve the chargeability, protect the photosensitive layer against electrical destruction, improve the chargeability, and improve the charge injection property from the support to the photosensitive layer. is there.

【0004】近年、特に高感度を有する電荷発生物質と
してオキシチタニウムフタロシアニン(以下TiOPc
と略す)が注目され、TiOPcを電荷発生層に用いた
電子写真感光体は非常に高感度であることが知られてい
るが、高感度であるため、キヤリアの絶対数が多くホ−
ルが注入した後のエレクトロンが電荷発生層中に滞留し
やすく、一種のメモリ−として電位変動を起こしやすい
という欠点がある。これは特に中間層を設けた感光体の
場合に著しく、低温低湿等の環境下では電荷発生層及び
中間層のエレクトロンに対する体積抵抗が上がるため、
このような電位変動が大きくなる。
In recent years, oxytitanium phthalocyanine (hereinafter referred to as TiOPc) has been used as a charge-generating substance having particularly high sensitivity.
It is known that an electrophotographic photoreceptor using TiOPc for the charge generation layer has a very high sensitivity. However, since the sensitivity is high, the absolute number of carriers is large and the photoreceptor has a large number of carriers.
There is a drawback that electrons after the injection of electrons easily stay in the charge generation layer, and as a kind of memory, potential fluctuation easily occurs. This is particularly remarkable in the case of a photoreceptor provided with an intermediate layer, and in an environment such as low temperature and low humidity, the volume resistance of the charge generation layer and the intermediate layer to electrons increases.
Such a potential fluctuation increases.

【0005】このような電位変動、即ちエレクトロンの
滞留が実際の画像に対して現れる現象としては、ゴ−ス
ト現象がある。特に電荷発生層と中間層の界面にエレク
トロンが滞留する場合は、プリント時の明部電位の上昇
として現れ、反転現像系で使用した場合、前プリント時
に光が当たったところの感度が遅くなり、次プリント時
に全面黒画像をとると前プリント部分が白く浮き出る、
ネガゴ−スト現象が顕著に現れる。
A phenomenon in which such potential fluctuations, that is, the accumulation of electrons, appears in an actual image is a ghost phenomenon. In particular, when electrons stay at the interface between the charge generation layer and the intermediate layer, they appear as an increase in the light-area potential during printing, and when used in a reversal development system, the sensitivity at the place where light was applied during pre-printing slows down. If you take a full black image at the next print, the previous print part will appear white,
The negative ghost phenomenon appears remarkably.

【0006】そこで、このような電荷発生層にTiOP
cを用いた感光体の大きな欠点である電位変動を減少さ
せる一つの手段として、中間層に非常に微粒子で分散性
のよい導電性フィラ−を含有させるという報告がある。
特に酸化スズで被覆された硫酸バリウム微粒子を中間層
に用いるという報告(特願平5−276936)がある
が、この硫酸バリウム微粒子は従来の導電性フィラ−に
比べ、非常に分散性がよく、局所的な抵抗変化を生じな
い。更に非常に微粒子であるためエレクトロンの注入ポ
イントが多く、電荷発生層中に滞留したエレクトロンを
速やかに支持体側に流すことができる。また、高温高湿
下、低温低湿下等の極端な環境下においても安定した電
位及び画像特性を得ることができると報告されている。
Therefore, TiOP is used for such a charge generation layer.
As one means for reducing potential fluctuation, which is a major drawback of photoconductors using c, there is a report that an intermediate layer contains a conductive filler having very fine particles and good dispersibility.
In particular, there is a report that barium sulfate fine particles coated with tin oxide is used for the intermediate layer (Japanese Patent Application No. 5-276936). However, these barium sulfate fine particles have much better dispersibility than conventional conductive fillers. Does not cause local resistance change. Further, since the particles are very fine, there are many injection points of the electrons, and the electrons staying in the charge generation layer can be quickly flowed toward the support. It is also reported that stable potential and image characteristics can be obtained even under extreme environments such as high temperature and high humidity and low temperature and low humidity.

【0007】しかし、エレクトロンの注入ポイントが増
加したものの、TiOPcのキャリア発生量が余りにも
多いため、電荷発生層中のエレクトロンの滞留を全く皆
無にすることはできず、電位特性及び画像特性はかなり
改善されるが、更なる改良を必要とする。
However, although the number of injection points of electrons is increased, the amount of generated carriers of TiOPc is too large, so that it is not possible to eliminate the stagnation of electrons in the charge generation layer at all, and the potential characteristics and image characteristics are considerably reduced. Improved but needs further improvement.

【0008】[0008]

【発明が解決しようとする課題】本発明の目的は、優れ
た電子写真特性としての高感度を維持しつつ、電位変動
及び画像欠陥の少ない電子写真感光体を提供すること、
更に該電子写真感光体を備えた電子写真装置を提供する
ことである。
SUMMARY OF THE INVENTION An object of the present invention is to provide an electrophotographic photoreceptor which has less potential fluctuation and image defects while maintaining high sensitivity as excellent electrophotographic characteristics.
Another object of the present invention is to provide an electrophotographic apparatus provided with the electrophotographic photosensitive member.

【0009】[0009]

【課題を解決するための手段】本発明は導電性支持体上
に、酸化スズで形成された被覆層を有する硫酸バリウム
微粒子からなる粉体を含有する中間層と、オキシチタニ
ウムフタロシアニン及びアゾ顔料を同時に含有する感光
層を有することを特徴とする電子写真感光体から構成さ
れる。
According to the present invention, an intermediate layer containing a powder of barium sulfate fine particles having a coating layer formed of tin oxide, an oxytitanium phthalocyanine and an azo pigment are provided on a conductive support. It comprises an electrophotographic photosensitive member having a photosensitive layer simultaneously contained.

【0010】電荷発生層にTiOPcを用いた電子写真
感光体の場合、中間層に硫酸バリウム微粒子を用いるこ
とによって、電荷発生層中のエレクトロンの滞留、即
ち、電位変動を小さくすることができるが十分ではな
い。そこで、本発明者等は、更にこの電位変動を小さく
させる方法を鋭意検討した結果、酸化スズで形成された
被覆層を有する硫酸バリウム微粒子からなる粉体を含有
する中間層を用いると同時に、電荷発生層の電荷発生物
質としてTiOPcとアゾ顔料を同時に用いることによ
って、電位変動を小さく抑え、画像欠陥を良化できるこ
とを見出し、また、更に高感度化を可能とした。
In the case of an electrophotographic photoreceptor using TiOPc for the charge generation layer, by using barium sulfate fine particles for the intermediate layer, the retention of electrons in the charge generation layer, that is, potential fluctuation can be reduced, but it is sufficient. is not. Therefore, the present inventors have further studied a method for reducing the potential fluctuation, and as a result, simultaneously using an intermediate layer containing a powder of barium sulfate fine particles having a coating layer formed of tin oxide, It has been found that by simultaneously using TiOPc and an azo pigment as the charge generation material of the generation layer, it is possible to suppress potential fluctuations and improve image defects, and to further increase sensitivity.

【0011】TiOPcにアゾ顔料を加えることによっ
て電位変動が小さくなる理由は明確には分からないが、
TiOPcにより大量に発生した滞留の原因となる励起
状態にあるエレクトロンがアゾ顔料によって基底状態に
戻り易くなるからであると考えられる。そのため電荷発
生層中での滞留の原因となるエレクトロンの数がそもそ
も少なくなり、更に硫酸バリウム微粒子を用いたエレク
トロンの注入ポイントの多い中間層と組み合わせること
によって、電位変動はかなり小さく抑えることができ
る。更にアゾ顔料はエレクトロン搬送性が非常によく、
そのためホ−ルの移動も円滑となり、高感度化につなが
ると推測される。
The reason why the potential fluctuation is reduced by adding an azo pigment to TiOPc is not clearly understood,
This is considered to be because electrons in an excited state causing a large amount of stagnation due to TiOPc easily return to the ground state by the azo pigment. Therefore, the number of electrons that cause stagnation in the charge generation layer is reduced in the first place, and furthermore, by combining with an intermediate layer having a large number of electron injection points using barium sulfate fine particles, the potential fluctuation can be suppressed to be considerably small. Furthermore, azo pigments have very good electron transportability,
Therefore, it is presumed that the movement of the hole becomes smooth and leads to higher sensitivity.

【0012】次に、本発明の電子写真感光体の構成につ
いて説明する。導電性支持体は、アルミニウム、アルミ
ニウム合金、銅、チタン、ステンレス等の金属や合金、
またはポリエチレンフタレ−ト、ポリブチレンテレフタ
レ−ト、フェノ−ル樹脂、ポリプロピレン、ポリスチレ
ン等の高分子材料、更には硬質紙等の材料を用いて作成
することができる。支持体の形状は円筒状、ベルト状あ
るいはシ−ト状が好ましい。支持体を構成する材料の体
積抵抗が高い場合には、導電処理をする必要がある。導
電処理は、支持体上に導電性薄膜を形成したり、あるい
は支持体内に導電性物質を分散させて行うことができ
る。
Next, the configuration of the electrophotographic photosensitive member of the present invention will be described. The conductive support is made of a metal or alloy such as aluminum, aluminum alloy, copper, titanium, and stainless steel,
Alternatively, it can be prepared using a polymer material such as polyethylene phthalate, polybutylene terephthalate, phenol resin, polypropylene, and polystyrene, and a material such as hard paper. The shape of the support is preferably cylindrical, belt-like or sheet-like. When the material constituting the support has a high volume resistance, it is necessary to conduct a conductive treatment. The conductive treatment can be performed by forming a conductive thin film on the support or dispersing a conductive substance in the support.

【0013】導電性支持体上に形成される中間層は、酸
化スズで被覆された硫酸バリウム微粒子をバインダ−樹
脂中に分散して形成される。この硫酸バリウムからなる
粉体の比抵抗は0.1〜1000Ωcm、更には1〜1
000Ωcmが好ましい。
The intermediate layer formed on the conductive support is formed by dispersing barium sulfate fine particles coated with tin oxide in a binder resin. The specific resistance of the barium sulfate powder is 0.1 to 1000 Ωcm,
000 Ωcm is preferred.

【0014】酸化スズ被覆層の被覆率は10〜80重量
%、更には30〜60重量%が好ましい。被覆層の被覆
率とは被覆層を有する微粒子からなる粉体の重量に対す
る、この粉体に使用されている被覆層の全重量の割合で
ある。被覆層を有する硫酸バリウム微粒子の平均粒径は
0.05〜1.0μm、更には0.07〜0.7μmが
好ましい。
The coverage of the tin oxide coating layer is preferably from 10 to 80% by weight, more preferably from 30 to 60% by weight. The coverage of the coating layer is the ratio of the total weight of the coating layer used in the powder to the weight of the powder comprising the fine particles having the coating layer. The average particle size of the barium sulfate fine particles having a coating layer is preferably 0.05 to 1.0 μm, more preferably 0.07 to 0.7 μm.

【0015】中間層に含有される硫酸バリウム微粒子の
含有量は、中間層に対して1.0〜90重量%、更には
5.0〜80重量%が好ましい。
The content of barium sulfate fine particles contained in the intermediate layer is preferably 1.0 to 90% by weight, more preferably 5.0 to 80% by weight, based on the intermediate layer.

【0016】被覆層には、必要に応じてフッ素あるいは
アンチモンを含有してもよい。フッ素あるいはアンチモ
ンを含有させることにより、被覆層の比抵抗を低下させ
ることができる。フッ素あるいはアンチモンを含有した
酸化スズの被覆層は、酸化スズの結晶格子に、フッ素原
子あるいはアンチモン原子が取り込まれた固溶体であ
る。フッ素あるいはアンチモンの含有量は、被覆層に対
して0.01〜30重量%、更には0.1〜10重量%
が好ましい。
The coating layer may contain fluorine or antimony as needed. By containing fluorine or antimony, the specific resistance of the coating layer can be reduced. The coating layer of tin oxide containing fluorine or antimony is a solid solution in which fluorine atoms or antimony atoms are incorporated in the crystal lattice of tin oxide. The content of fluorine or antimony is 0.01 to 30% by weight, more preferably 0.1 to 10% by weight, based on the coating layer.
Is preferred.

【0017】中間層に用いられるバインダ−樹脂として
は、例えばフェノ−ル樹脂、ポリウレタン、ポリアミ
ド、ポリイミド、ポリアミドイミド、ポリアミド酸、ポ
リビニルアセタ−ル、エポキシ樹脂、アクリル樹脂、メ
ラミン樹脂あるいはポリエステル等が挙げられる。これ
等の樹脂は単独でも、2種以上を組み合わせて用いても
よい。これ等の樹脂は、導電性支持体に対する接着性が
良好であると共に、本発明において使用するフィラ−の
分散性を向上させ、かつ、成膜後の耐溶剤性が良好であ
る。上記樹脂の中でも、特にフェノ−ル樹脂、ポリウレ
タン及びポリアミド酸が好ましい。
As the binder resin used for the intermediate layer, for example, phenol resin, polyurethane, polyamide, polyimide, polyamide imide, polyamic acid, polyvinyl acetal, epoxy resin, acrylic resin, melamine resin or polyester is used. No. These resins may be used alone or in combination of two or more. These resins have good adhesiveness to the conductive support, improve the dispersibility of the filler used in the present invention, and have good solvent resistance after film formation. Among the above resins, phenol resins, polyurethanes and polyamic acids are particularly preferred.

【0018】中間層の膜厚は0.1〜30μm、更には
0.5〜10μmが好ましい。また、中間層の体積抵抗
率1013Ωcm以下、更には1012Ωcm以下、10Ω
cm以上が好ましい。本発明においては、体積抵抗率は
アルミニウム板上に測定対象に中間層を塗布し、更にこ
の中間層上に金の薄膜を形成して、アルミニウム板と金
薄膜の両電極間を流れる電流値をpAメ−タ−で測定し
て求めた。
The thickness of the intermediate layer is preferably 0.1 to 30 μm, more preferably 0.5 to 10 μm. The volume resistivity of 10 13 [Omega] cm in the middle layer or less, more 10 12 [Omega] cm or less, 10 [Omega
cm or more is preferred. In the present invention, the volume resistivity is obtained by applying an intermediate layer to an object to be measured on an aluminum plate, forming a gold thin film on the intermediate layer, and measuring a current value flowing between both electrodes of the aluminum plate and the gold thin film. It was determined by measuring with a pA meter.

【0019】必要に応じて、中間層と感光層の間にはポ
リアミド、ポリウレタン、エポキシ樹脂等のバリア層を
設けることができる。
If necessary, a barrier layer such as polyamide, polyurethane or epoxy resin can be provided between the intermediate layer and the photosensitive layer.

【0020】電荷発生物質としては、少なくともオキシ
チタニウムフタロシアニン及びアゾ顔料を用い、その他
のアゾ系有機顔料を1種または複数種混合してもよい。
As the charge generating material, at least oxytitanium phthalocyanine and an azo pigment are used, and one or more other azo organic pigments may be mixed.

【0021】オキシチタニウムフタロシアニンについて
は、CuKα特性X線回折における回折角で2θ±0.
2°が9.0°、14.2°、23.9°及び27.1
°に強いピ−クを有するオキシチタニウムフタロシアニ
ンが特に良い。
Oxytitanium phthalocyanine has a diffraction angle of 2θ ± 0.2 in CuKα characteristic X-ray diffraction.
2 ° is 9.0 °, 14.2 °, 23.9 ° and 27.1
Oxytitanium phthalocyanine, which has a peak at a high degree, is particularly good.

【0022】アゾ顔料については、下記一般式(1)〜
(3)で示されるアゾ顔料が好ましいが、その中でも特
に下記構造式(1)を有するアゾ顔料が最も好適であ
る。 一般式(1)
The azo pigment is represented by the following general formula (1):
The azo pigment represented by (3) is preferred, and among them, the azo pigment having the following structural formula (1) is most preferred. General formula (1)

【化4】 一般式(2)Embedded image General formula (2)

【化5】 一般式(3)Embedded image General formula (3)

【化6】 一般式(1)〜(3)におけるArはカプラ−残基を表
わす。
Embedded image Ar in the general formulas (1) to (3) represents a coupler residue.

【0023】Arで示すカプラ−残基は、下記イ、ロ、
ハ及びニで示す基の中から選択され、1種あるいは2種
以上を組み合わせてもよい。カプラ−残基イ
The coupler residue represented by Ar is as follows:
One selected from the groups represented by c and d may be used alone or in combination of two or more. Coupler residue a

【化7】 カプラ−残基ロEmbedded image Coupler residue

【化8】 カプラ−残基ハEmbedded image Coupler residue

【化9】 カプラ−残基ニEmbedded image Coupler residue

【化10】 カプラ−残基イ、ロ、ハ及びニ中のXはハロゲンまたは
アルキル基を表わす。
Embedded image X in the coupler residues a, b, c and d represents a halogen or an alkyl group.

【0024】アゾ顔料構造式(1)Azo pigment structural formula (1)

【化11】 Embedded image

【0025】オキシチタニウムフタロシアニンに対する
アゾ顔料の比率は1〜200%、更には5〜100%が
好ましい。
The ratio of the azo pigment to oxytitanium phthalocyanine is preferably 1 to 200%, more preferably 5 to 100%.

【0026】更に積層型感光体の場合、必要に応じて電
荷発生層にバインダ−樹脂を添加する。電荷発生層用バ
インダ−樹脂としては例えば、アクリル樹脂、ポリエス
テル、ポリアミド、ポリ酢酸ビニル、ポリカ−ボネ−
ト、ポリビニルブチラ−ル、ポリビニルベンザ−ル等の
熱可塑性樹脂、ポリウレタン、フェノ−ル樹脂、エポキ
シ樹脂等の熱硬化性樹脂等が挙げられる。更に必要に応
じた添加剤を添加することもできる。
Further, in the case of a laminated type photoreceptor, a binder resin is added to the charge generation layer as needed. As the binder resin for the charge generation layer, for example, acrylic resin, polyester, polyamide, polyvinyl acetate, polycarbonate
And thermoplastic resins such as polyvinyl butyral and polyvinyl benzal, and thermosetting resins such as polyurethane, phenol resin and epoxy resin. Further, additives may be added as needed.

【0027】電荷輸送層は一般に電荷輸送物質、バイン
ダ−樹脂に溶媒を加え、塗布液を調製し、これを塗布す
ることによって形成される。電荷輸送物質としてはヒド
ラゾン系化合物、スチルベン系化合物、ピラゾリン系化
合物、オキサゾ−ル系化合物、チアゾ−ル系化合物、ト
リアリ−ルメタン系化合物等が挙げられる。溶媒として
は、バインダ−樹脂、電荷輸送物質に対する溶解性の良
好なもの、例えばメチルエチルケトン、アセトン、メチ
ルイソブチルケトン、シクロヘキサノン等のケトン類、
ジエチルエ−テル、テトラヒドロフラン等のエ−テル
類、酢酸エチル、酢酸ブチル等のエステル類、トルエ
ン、ベンゼン等の炭化水素類、クロロベンゼン、ジクロ
ロメタン等のハロゲン化炭化水素類等が挙げられる。
The charge transporting layer is generally formed by adding a solvent to a charge transporting substance and a binder resin to prepare a coating solution and applying the coating solution. Examples of the charge transport material include hydrazone compounds, stilbene compounds, pyrazoline compounds, oxazole compounds, thiazole compounds, and triarylmethane compounds. As the solvent, binder-resin, those having good solubility in the charge transporting substance, for example, ketones such as methyl ethyl ketone, acetone, methyl isobutyl ketone, cyclohexanone,
Ethers such as diethyl ether and tetrahydrofuran; esters such as ethyl acetate and butyl acetate; hydrocarbons such as toluene and benzene; and halogenated hydrocarbons such as chlorobenzene and dichloromethane.

【0028】バインダ−樹脂に対する電荷輸送物質の比
率はバインダ−樹脂及び電荷輸送物質の種類にもよる
が、一般的に20〜70%、更には30〜65%が好ま
しい。電荷輸送物質の比率が少ないと十分な感度が得ら
れず、また、電荷輸送物質の比率が多すぎると表面層の
強度が低下し傷つき易くなる。
The ratio of the charge transporting substance to the binder resin depends on the types of the binder resin and the charge transporting substance, but is generally preferably 20 to 70%, more preferably 30 to 65%. If the ratio of the charge transport material is small, sufficient sensitivity cannot be obtained, and if the ratio of the charge transport material is too large, the strength of the surface layer is reduced and the surface layer is easily damaged.

【0029】必要に応じて、表面層に無機フィラ−やポ
リエチレン、ポリフルオロエチレン、シリカ等の潤滑剤
を添加してもよい。バインダ−樹脂に対する潤滑剤の比
率は0.1〜50%、更には1〜30%が好ましい。更
に必要に応じた添加剤、例えば分散助剤、シリコ−ンオ
イル、レベリング剤、金属石けん、シランカップリング
剤等を添加することもできる。
If necessary, a lubricant such as an inorganic filler, polyethylene, polyfluoroethylene, or silica may be added to the surface layer. The ratio of the lubricant to the binder resin is preferably 0.1 to 50%, more preferably 1 to 30%. Further, if necessary, additives such as dispersing aid, silicone oil, leveling agent, metal soap, silane coupling agent and the like can be added.

【0030】表面保護を目的とした表面保護層を必要に
応じて設けることができる。
A surface protection layer for the purpose of surface protection can be provided as required.

【0031】本発明の電子写真感光体の層構成は、導電
性支持体上に少なくとも中間層、電荷発生層及び電荷輸
送層の3層以上に機能分離された積層型感光体であっ
て、中間層に酸化スズで形成された被覆層を有する硫酸
バリウム微粒子からなる粉体を含有し、電荷発生層にT
iOPc及びアゾ顔料を含有した電子写真感光体あるい
は導電性支持体上に少なくとも中間層及び感光層を有す
る単層型感光体であって、中間層に酸化スズで形成され
た被覆層を有する硫酸バリウム微粒子からなる粉体を含
有し、感光層にTiOPc、アゾ顔料及び電荷輸送物質
を含有した電子写真感光体あるいは導電性支持体上に少
なくとも中間層、電荷発生層、電荷輸送層及び表面保護
層に機能分離された積層型感光体であって、中間層に酸
化スズで形成された被覆層を有する硫酸バリウム微粒子
からなる粉体を含有し、電荷発生層にTiOPc及びア
ゾ顔料を含有した電子写真感光体に構成されている。
The layer constitution of the electrophotographic photoreceptor of the present invention is a laminated type photoreceptor having at least three layers of an intermediate layer, a charge generation layer and a charge transport layer on a conductive support. Layer containing powder of barium sulfate fine particles having a coating layer formed of tin oxide,
An electrophotographic photoreceptor containing iOPc and an azo pigment or a single-layer photoreceptor having at least an intermediate layer and a photosensitive layer on a conductive support, wherein the intermediate layer has a barium sulfate having a coating layer formed of tin oxide. An electrophotographic photoreceptor or a conductive support containing a powder composed of fine particles and containing TiOPc, an azo pigment and a charge transport material in a photosensitive layer, and at least an intermediate layer, a charge generation layer, a charge transport layer and a surface protection layer. An electrophotographic photosensitive member having a function-separated layered photoreceptor, comprising a powder of barium sulfate fine particles having a coating layer formed of tin oxide in an intermediate layer, and TiOPc and an azo pigment in a charge generation layer. The body is made up.

【0032】本発明において用いられる塗布方法として
は浸漬コ−ティング法、スプレ−コ−ティング法、ロ−
ルコ−タコ−ティング法、グラビアコ−タコ−ティング
法等が適用される。
The coating method used in the present invention includes a dipping coating method, a spray coating method, and a coating method.
The ruco-taco coating method, the gravure-taco coating method and the like are applied.

【0033】本発明の電子写真感光体は、複写機、レ−
ザ−プリンタ−、LEDプリンタ−、液晶シャッタ−式
プリンタ−等の電子写真装置一般に適応し得るが、更
に、電子写真技術を応用したディスプレ−、記録、軽印
刷、製版及びファクシミリ等の装置にも幅広く適用し得
るものである。
The electrophotographic photosensitive member of the present invention can be
The present invention can be applied to general electrophotographic devices such as printers, LED printers, and liquid crystal shutter printers, but is also applicable to devices such as display, recording, light printing, plate making, and facsimile using electrophotographic technology. It can be widely applied.

【0034】また、本発明は前記本発明の電子写真感光
体を備えた電子写真装置から構成される。
Further, the present invention comprises an electrophotographic apparatus provided with the electrophotographic photoreceptor of the present invention.

【0035】図1に本発明のドラム型感光体を用いた一
般的な転写式電子写真装置の概略構成を示した。図にお
いて、1は像担持体としてのドラム型感光体であり軸1
aを中心に矢印方向に所定の周速度で回転駆動される。
該感光体1はその回転過程で帯電手段2によりその周面
に正または負の所定電位の均一帯電を受け、次いで露光
部3にて不図示の像露光手段により光像露光L(スリッ
ト露光・レ−ザ−ビ−ム走査露光など)を受ける。これ
により感光体周面に露光像に対応した静電潜像が順次形
成されていく。その静電潜像は、次いで現像手段4でト
ナ−現像され、そのトナ−現像像が転写手段5により不
図示の給紙部から感光体1と転写手段5との間に感光体
1の回転と同期取りされて給送された転写材Pの面に順
次転写されていく。像転写を受けた転写材Pは感光体面
から分離されて像定着手段8へ導入されて像定着を受け
て複写物(コピ−)として機外へプリントアウトされ
る。像転写後の感光体1の表面はクリ−ニング手段6に
て転写残りトナ−の除去を受けて清浄面化され、前露光
手段7により除電処理がされて繰り返して像形成に使用
される。感光体1の均一帯電手段2としてはコロナ帯電
装置が一般に広く使用されている。また、転写装置5も
コロナ転写手段が一般に広く使用されている。電子写真
装置として、上述の感光体や現像手段、クリ−ニング手
段などの構成要素のうち、複数のものを装置ユニットと
して一体に結合して構成し、このユニットを装置本体に
対して着脱自在に構成しても良い。例えば、感光体1と
クリ−ニング手段6とを一体化してひとつの装置ユニッ
トとし、装置本体のレ−ルなどの案内手段を用いて着脱
自在の構成にしてもよい。このとき、上記の装置ユニッ
トのほうに帯電手段および/または現像手段を伴って構
成してもよい。また、光像露光Lは、電子写真装置を複
写機やプリンタ−として使用する場合には、原稿からの
反射光や透過光を用いる、あるいは、原稿を読み取り信
号化に従って、この信号によりレ−ザ−ビ−ムの走査、
発光ダイオ−ドアレイの駆動、または液晶シャッタ−ア
レイの駆動などを行うことにより行われる。
FIG. 1 shows a schematic configuration of a general transfer type electrophotographic apparatus using the drum type photosensitive member of the present invention. In the figure, reference numeral 1 denotes a drum type photosensitive member as an image carrier, and a shaft 1
It is rotationally driven at a predetermined peripheral speed in the direction of the arrow around a.
The photoreceptor 1 is uniformly charged with a predetermined positive or negative potential on its peripheral surface by a charging means 2 during the rotation process, and then, in an exposure section 3, a light image exposure L (slit exposure / (Laser beam scanning exposure, etc.). As a result, an electrostatic latent image corresponding to the exposure image is sequentially formed on the peripheral surface of the photoconductor. The electrostatic latent image is then toner-developed by the developing means 4, and the toner-developed image is rotated by the transfer means 5 between the photosensitive member 1 and the transfer means 5 from a paper feeding unit (not shown). Are sequentially transferred onto the surface of the transfer material P fed in synchronization with the transfer. The transfer material P having undergone the image transfer is separated from the photoreceptor surface, introduced into the image fixing means 8 and subjected to image fixing to be printed out as a copy (copy) outside the machine. The surface of the photoreceptor 1 after the image transfer is cleaned and cleaned by removing the transfer residual toner by the cleaning means 6, and is subjected to static elimination by the pre-exposure means 7, and is repeatedly used for image formation. As the uniform charging means 2 for the photoreceptor 1, a corona charging device is generally widely used. Also, the corona transfer means is generally widely used for the transfer device 5. As an electrophotographic apparatus, a plurality of components such as the above-described photoreceptor, developing means, and cleaning means are integrally connected as an apparatus unit, and this unit is detachably attached to the apparatus body. You may comprise. For example, the photoreceptor 1 and the cleaning means 6 may be integrated into one apparatus unit, and may be configured to be detachable using guide means such as rails of the apparatus body. At this time, the above-described device unit may be provided with a charging unit and / or a developing unit. When the electrophotographic apparatus is used as a copying machine or a printer, the light image exposure L uses a reflected light or a transmitted light from the original, or reads the original and converts the signal into a laser. Scanning of the beam,
This is performed by driving a light emitting diode array or a liquid crystal shutter array.

【0036】[0036]

【実施例】【Example】

実施例1 酸化スズで形成された被覆層を有する硫酸バリウム微粒
子からなる粉体(被覆率50重量%、粉体比抵抗700
Ωcm)120ブ部(重量部、以下同様)とレゾ−ル型
フェノ−ル樹脂(商品名ブライオ−フェンJ−325、
大日本インキ化学工業(株)製、固形分70%)70部
と2−メトキシ−1−プロパノ−ル100部とからなる
溶液を約20時間ボ−ルミルで分散し、中間層用塗布液
を調製した。この塗布液に含有するフィラ−の平均粒径
は0.22μmであった。
Example 1 Powder composed of barium sulfate fine particles having a coating layer formed of tin oxide (covering ratio: 50% by weight, powder specific resistance: 700)
Ωcm) 120 parts (parts by weight, the same applies hereinafter) and a resole type phenol resin (trade name Brio-Fen J-325,
A solution consisting of 70 parts of Dainippon Ink and Chemicals, Inc., 70% solids) and 100 parts of 2-methoxy-1-propanol was dispersed in a ball mill for about 20 hours to prepare a coating solution for the intermediate layer. Prepared. The average particle size of the filler contained in this coating solution was 0.22 μm.

【0037】中間層用塗布液を外径24mm、長さ25
7mmのアルミニウムシリンダ−上に浸漬コ−ティング
法によって塗布し、140℃で30分間加熱硬化するこ
とにより、膜厚15μmの中間層を形成した。
An intermediate layer coating solution was prepared with an outer diameter of 24 mm and a length of 25
It was applied on a 7 mm aluminum cylinder by an immersion coating method, and was heated and cured at 140 ° C. for 30 minutes to form an intermediate layer having a thickness of 15 μm.

【0038】次に、共重合ナイロン(商品名アミランC
M−8000、東レ(株)製)10部をメタノ−ル60
部とブタノ−ル40部の混合液に溶解した溶液を前記中
間層上に浸漬塗布し、90℃で10分間加熱乾燥して膜
厚0.5μmのバリア層を形成した。
Next, a copolymer nylon (trade name: Amiran C)
M-8000, manufactured by Toray Industries, Inc.)
A solution dissolved in a mixture of 1 part and 40 parts of butanol was dip-coated on the intermediate layer, and dried by heating at 90 ° C. for 10 minutes to form a barrier layer having a thickness of 0.5 μm.

【0039】次に、X線回折における回折角2θ±0.
2°が、9.0°、14.2°、23.9°及び27.
1°に強いピ−クを有するTiOPc結晶10.8部と
下記構造式を有するアゾキシ顔料1.2部
Next, the diffraction angle 2θ ± 0.
2 ° is 9.0 °, 14.2 °, 23.9 ° and 27.
10.8 parts of TiOPc crystal having a peak at 1 ° and 1.2 parts of azoxy pigment having the following structural formula

【化12】 をポリビニルブチラ−ル(商品名エスレックBX−1、
積水化学(株)製)10部をシクロヘキサノン250部
に溶解した液に添加し、1mmφのガラスビ−ズを用い
たサンドミルで分散し、酢酸エチルを加えて希釈した
後、この分散液を先に形成したバリア層上に塗布し、8
0℃で10分間乾燥して、膜厚0.25μmの電荷発生
層を形成した。
Embedded image To polyvinyl butyral (trade name ESLEC BX-1,
10 parts of Sekisui Chemical Co., Ltd.) was added to a solution of 250 parts of cyclohexanone, dispersed in a sand mill using a 1 mmφ glass bead, diluted with ethyl acetate, and then formed into a dispersion. 8 on the barrier layer
After drying at 0 ° C. for 10 minutes, a charge generation layer having a thickness of 0.25 μm was formed.

【0040】更に、ビスフェノ−ルZ型ポリカ−ボネ−
ト10部と下記構造式の電荷輸送物質
Further, bisphenol Z-type polycarbonate
Charge transport material of the following structural formula

【化13】 10部を塩化メチレン80部に溶解し、得られた溶液を
電荷発生層上に浸漬塗布し、110℃で1時間乾燥し、
膜厚24μmの電荷輸送層を形成して、積層型の電子写
真感光体を作成した。
Embedded image 10 parts were dissolved in 80 parts of methylene chloride, and the obtained solution was dip-coated on the charge generation layer, and dried at 110 ° C. for 1 hour.
A charge transporting layer having a thickness of 24 μm was formed to prepare a laminated electrophotographic photosensitive member.

【0041】作成した電子写真感光体を下記の方法を用
いて評価した。
The prepared electrophotographic photosensitive member was evaluated by the following method.

【0042】まずヒュ−レットパッカ−ド製レ−ザ−ビ
−ムプリンタ−(商品名レ−ザ−ジェットIV)を用い
て画像評価を行った。33.5℃、湿度85%の高温高
湿下で初期にゴ−スト画像を取り、また14℃、湿度2
0%の低温低湿下で同様に初期及び1000枚耐久後の
ゴ−スト画像を取った。ゴ−スト画像はドラム一周分適
当なパタ−ンを印字し、その後全面ハ−フト−ン画像と
した。
First, image evaluation was performed using a laser beam printer (trade name: Laser Jet IV) manufactured by Hewlett-Packard. A ghost image was initially taken at a high temperature and high humidity of 33.5 ° C. and a humidity of 85%.
In the same manner, at the low temperature and low humidity of 0%, the ghost images at the initial stage and after the durability of 1000 sheets were taken. For the ghost image, an appropriate pattern was printed for one rotation of the drum, and then the entire image was made a halftone image.

【0043】画像評価方法は次にようにして行った。耐
久パタ−ンは約2mm幅の線を縦横7mm置きに印字し
た。画像サンプルは全面黒と1ドット1スペ−スのドッ
ト密度の画像を機械の現像ボリュ−ム、F5(中心値)
とF9(濃度薄い)で各々サンプリングした。評価は、
ゴ−ストが見えないものをランク5とし、1ドット1ス
ペ−スF9で見えるものをランク4、1ドット1スペ−
スF5で見えるものをランク3、全面黒F9で見えるも
のをランク2、全て見えるものをランク1とした。
The image evaluation was performed as follows. The endurance pattern was printed with a line of about 2 mm width every 7 mm in length and width. The image sample is an image of the entire surface black and dot density of 1 dot 1 space, developed by machine, F5 (center value)
And F9 (concentration is low). Evaluation,
If the ghost is not visible, rank 5 is set. If the ghost is visible with 1 dot 1 space F9, the rank is 4 and 1 dot 1 space.
In the case of F3, those which can be seen with F3 are ranked as 3, those which can be seen entirely with black F9 are in the rank of 2, and those which can be seen in all of them are in the rank of 1.

【0044】更に、前述の高温高湿下及び低温低湿下に
おいて、初期及び1000枚耐久後の暗部電位(VD
及び明部電位(VL )を測定した。
Further, under the above-mentioned high-temperature and high-humidity conditions and low-temperature and low-humidity conditions, the dark portion potential (V D ) at the initial stage and after the endurance of 1,000 sheets is obtained.
And the light potential ( VL ) were measured.

【0045】評価結果を表1、2及び3に示す。The evaluation results are shown in Tables 1, 2 and 3.

【0046】実施例2 実施例1における電荷発生層の形成において、TiOP
cを10部及びアゾキシ顔料を2部とした他は、実施例
1と同様にして電子写真感光体を作成し、評価した。結
果を表1、2及び3に示す。
Example 2 In the formation of the charge generation layer in Example 1, TiOP
An electrophotographic photoreceptor was prepared and evaluated in the same manner as in Example 1, except that c was 10 parts and azoxy pigment was 2 parts. The results are shown in Tables 1, 2 and 3.

【0047】実施例3 実施例1における電荷発生層の形成において、TiOP
cを6.0部及びアゾキシ顔料を6.0部とした他は、
実施例1と同様にして電子写真感光体を作成し、評価し
た。結果を表1、2及び3に示す。
Example 3 In the formation of the charge generation layer in Example 1, TiOP
c was 6.0 parts and the azoxy pigment was 6.0 parts,
An electrophotographic photosensitive member was prepared and evaluated in the same manner as in Example 1. The results are shown in Tables 1, 2 and 3.

【0048】実施例4 電荷発生層に含有するアゾ顔料を、下記構造式のアゾ顔
料に代えた他は、実施例1と同様にして電子写真感光体
を作成し評価した。結果を表1、2及び3に示す。
Example 4 An electrophotographic photoreceptor was prepared and evaluated in the same manner as in Example 1 except that the azo pigment contained in the charge generation layer was changed to an azo pigment having the following structural formula. The results are shown in Tables 1, 2 and 3.

【化14】 Embedded image

【0049】実施例5 実施例4において、電荷発生層に含有するTiOPcを
10部及びアゾ顔料を2部とした他は、実施例4と同様
にして電子写真感光体を作成し、評価した。結果を表
1、2及び3に示す。
Example 5 An electrophotographic photosensitive member was prepared and evaluated in the same manner as in Example 4, except that 10 parts of TiOPc and 2 parts of an azo pigment were contained in the charge generation layer. The results are shown in Tables 1, 2 and 3.

【0050】実施例6 実施例4において、電荷発生層に含有するTiOPcを
6.0部及びアゾ顔料を6.0部とした他は、実施例4
と同様にして電子写真感光体を作成し、評価した。結果
を表1、2及び3に示す。
Example 6 Example 4 was the same as Example 4 except that the charge generation layer contained 6.0 parts of TiOPc and 6.0 parts of an azo pigment.
An electrophotographic photoreceptor was prepared and evaluated in the same manner as described above. The results are shown in Tables 1, 2 and 3.

【0051】実施例7 実施例1において、電荷発生層に含有するアゾ顔料を下
記構造式のアゾ顔料とした他は、実施例1と同様にして
電子写真感光体を作成し、評価した。結果を表1、2及
び3に示す。
Example 7 An electrophotographic photosensitive member was prepared and evaluated in the same manner as in Example 1, except that the azo pigment contained in the charge generation layer was changed to the azo pigment having the following structural formula. The results are shown in Tables 1, 2 and 3.

【化15】 Embedded image

【0052】実施例8 実施例7において、電荷発生層に含有するTiOPcを
10部及びアゾ顔料を2部とした他は、実施例4と同様
にして電子写真感光体を作成し、評価した。結果を表
1、2及び3に示す。
Example 8 An electrophotographic photosensitive member was prepared and evaluated in the same manner as in Example 7, except that 10 parts of TiOPc and 2 parts of an azo pigment were used in the charge generation layer. The results are shown in Tables 1, 2 and 3.

【0053】実施例9 実施例7において、電荷発生層に含有するTiOPcを
6.0部及びアゾ顔料を6.0部とした他は、実施例7
と同様にして電子写真感光体を作成し、評価した。結果
を表1、2及び3に示す。
Example 9 Example 7 was the same as Example 7 except that the charge generation layer contained 6.0 parts of TiOPc and 6.0 parts of an azo pigment.
An electrophotographic photoreceptor was prepared and evaluated in the same manner as described above. The results are shown in Tables 1, 2 and 3.

【0054】比較例1 アンチモンを含有する酸化スズで形成される被覆層を有
する酸化チタン微粒子からなる粉体(商品名ECTT−
1、チタン工業(株)製)150部と実施例1における
と同様のレゾ−ル系フェノ−ル樹脂75部とメチルセロ
ソルブ60部及びメタノ−ル15部からなる混合液を実
施例1と同様にして分散した。この分散液の含有するフ
ィラ−の平均粒径は0.25μmであった。この分散液
を用いて中間層を形成した他は、実施例1と同様にして
電子写真感光体を作成し、評価した。結果を表1、2及
び3に示す。
Comparative Example 1 Powder comprising titanium oxide fine particles having a coating layer formed of tin oxide containing antimony (trade name: ECTT-
1, Titanium Industry Co., Ltd.) A mixed solution consisting of 150 parts of the same phenol resin as in Example 1, 75 parts of methylcellosolve and 15 parts of methanol was used in the same manner as in Example 1. And dispersed. The average particle size of the filler contained in this dispersion was 0.25 μm. An electrophotographic photosensitive member was prepared and evaluated in the same manner as in Example 1 except that an intermediate layer was formed using this dispersion. The results are shown in Tables 1, 2 and 3.

【0055】比較例2 電荷発生層に含有する電荷発生物質をTiOPcのみに
した他は、実施例1と同様にして電子写真感光体を作成
し評価した。結果を表1、2及び3に示す。
Comparative Example 2 An electrophotographic photosensitive member was prepared and evaluated in the same manner as in Example 1, except that only the TiOPc was used as the charge generating substance contained in the charge generating layer. The results are shown in Tables 1, 2 and 3.

【0056】比較例3 実施例1において、電荷発生層に含有するアゾ顔料を下
記構造式のペリレン化合物とした他は、実施例1と同様
にして電子写真感光体を作成し、評価した。結果を表
1、2及び3に示す。
Comparative Example 3 An electrophotographic photosensitive member was prepared and evaluated in the same manner as in Example 1, except that the azo pigment contained in the charge generation layer was changed to a perylene compound having the following structural formula. The results are shown in Tables 1, 2 and 3.

【化16】 Embedded image

【0057】比較例4 実施例1において、電荷発生層に含有するアゾ顔料を下
記構造式のアンサンスロン化合物とした他は、実施例1
と同様にして電子写真感光体を作成し、評価した。結果
を表1、2及び3に示す。
Comparative Example 4 Example 1 was repeated except that the azo pigment contained in the charge generation layer was changed to an ensenthrone compound having the following structural formula.
An electrophotographic photoreceptor was prepared and evaluated in the same manner as described above. The results are shown in Tables 1, 2 and 3.

【化17】 Embedded image

【0058】[0058]

【表1】 [Table 1]

【表2】 [Table 2]

【表3】 [Table 3]

【0059】[0059]

【発明の効果】本発明の電子写真感光体は、高感度で、
かつ、電位変動及び画像欠陥が少ないという顕著な効果
を奏する。
The electrophotographic photoreceptor of the present invention has high sensitivity,
In addition, there is a remarkable effect that there are few potential fluctuations and image defects.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の電子写真感光体を備えた電子写真装置
の概略構成例を示す図である。
FIG. 1 is a view showing a schematic configuration example of an electrophotographic apparatus provided with an electrophotographic photosensitive member of the present invention.

【符号の説明】[Explanation of symbols]

1 本発明の電子写真感光体 1a 軸 2 帯電手段 3 露光部 4 現像手段 5 転写手段 6 クリ−ニング手段 7 前露光手段 8 像定着手段 L 光像露光 P 像転写を受けた転写材 DESCRIPTION OF SYMBOLS 1 Electrophotographic photoreceptor of this invention 1a shaft 2 Charging means 3 Exposure part 4 Developing means 5 Transfer means 6 Cleaning means 7 Pre-exposure means 8 Image fixing means L Light image exposure P Transfer material after image transfer

───────────────────────────────────────────────────── フロントページの続き (72)発明者 穴山 秀樹 東京都大田区下丸子3丁目30番2号 キ ヤノン株式会社内 (56)参考文献 特開 平6−208238(JP,A) 特開 平7−199508(JP,A) 特開 平5−303226(JP,A) 特開 平5−66595(JP,A) 特開 平5−66596(JP,A) (58)調査した分野(Int.Cl.7,DB名) G03G 5/14 G03G 5/06 342 G03G 5/06 360 G03G 5/06 371 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hideki Anayama 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (56) References JP-A-6-208238 (JP, A) JP-A-7 -199508 (JP, A) JP-A-5-303226 (JP, A) JP-A-5-66595 (JP, A) JP-A-5-66596 (JP, A) (58) Fields investigated (Int. . 7, DB name) G03G 5/14 G03G 5/06 342 G03G 5/06 360 G03G 5/06 371

Claims (11)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 導電性支持体上に、酸化スズで形成され
た被覆層を有する硫酸バリウム微粒子からなる粉体を含
有する中間層と、オキシチタニウムフタロシアニン及び
アゾ顔料を同時に含有する感光層を有することを特徴と
する電子写真感光体。
1. An electroconductive support comprising an intermediate layer containing a powder of barium sulfate fine particles having a coating layer formed of tin oxide, and a photosensitive layer containing oxytitanium phthalocyanine and an azo pigment at the same time. An electrophotographic photoreceptor, comprising:
【請求項2】 請求項1記載のオキシチタニウムフタロ
シアニンがCuKα特性X線回折における回折角で2θ
±0.2°が9.0°、14.2°、23.9°及び2
7.1°に強いピ−クを有する請求項1記載の電子写真
感光体。
2. The oxytitanium phthalocyanine according to claim 1 has a diffraction angle of 2θ in CuKα characteristic X-ray diffraction.
± 0.2 ° is 9.0 °, 14.2 °, 23.9 ° and 2
2. The electrophotographic photosensitive member according to claim 1, which has a strong peak at 7.1 [deg.].
【請求項3】 請求項1記載のアゾ顔料が下記一般式
(1)〜(3)で示される中心骨格を備えたアゾ顔料か
らなる群から選ばれる請求項1記載の電子写真感光体。 一般式(1) 【化1】 一般式(2) 【化2】 一般式(3) 【化3】 一般式(1)〜(3)におけるArはカプラ−残基を表
わす。
3. The electrophotographic photosensitive member according to claim 1, wherein the azo pigment according to claim 1 is selected from the group consisting of azo pigments having a central skeleton represented by the following general formulas (1) to (3). General formula (1) General formula (2) General formula (3) Ar in the general formulas (1) to (3) represents a coupler residue.
【請求項4】 請求項1における酸化スズで形成された
被覆層を有する硫酸バリウム微粒子の被覆率が10〜8
0重量%である請求項1記載の電子写真感光体。
4. The coating rate of the barium sulfate fine particles having the coating layer formed of tin oxide according to claim 1 is 10 to 8.
2. The electrophotographic photosensitive member according to claim 1, wherein the amount is 0% by weight.
【請求項5】 請求項1における酸化スズで形成された
被覆層を有する硫酸バリウム微粒子の被覆率が30〜6
0重量%である請求項1記載の電子写真感光体。
5. The barium sulfate fine particles having a coating layer formed of tin oxide according to claim 1 having a coverage of 30 to 6%.
2. The electrophotographic photosensitive member according to claim 1, wherein the amount is 0% by weight.
【請求項6】 請求項1における酸化スズで形成された
被覆層にフッ素及びアンチモンからなる群から選ばれた
化合物を含有する請求項1記載の電子写真感光体。
6. The electrophotographic photoreceptor according to claim 1, wherein the coating layer formed of tin oxide according to claim 1 contains a compound selected from the group consisting of fluorine and antimony.
【請求項7】 請求項6記載の被覆層におけるフッ素及
びアンチモンからなる群から選ばれた化合物の含有量が
該被覆層に対して0.01〜30重量%である請求項6
記載の電子写真感光体。
7. The coating layer according to claim 6, wherein the content of the compound selected from the group consisting of fluorine and antimony is 0.01 to 30% by weight based on the coating layer.
The electrophotographic photosensitive member according to the above.
【請求項8】 請求項6記載の被覆層におけるフッ素及
びアンチモンからなる群から選ばれた化合物の含有量が
該被覆層に対して0.1〜10重量%である請求項6記
載の電子写真感光体。
8. The electrophotograph according to claim 6, wherein the content of the compound selected from the group consisting of fluorine and antimony in the coating layer according to claim 6 is 0.1 to 10% by weight based on the coating layer. Photoconductor.
【請求項9】 電子写真感光体の層構成が中間層上に電
荷発生層及び電荷輸送層の2種以上に機能分離された積
層型感光体である請求項1記載の電子写真感光体。
9. The electrophotographic photoreceptor according to claim 1, wherein the layer constitution of the electrophotographic photoreceptor is a laminate type photoreceptor in which a charge generation layer and a charge transport layer are separated into two or more functions on an intermediate layer.
【請求項10】 電子写真感光体の層構成が中間層上に
電荷発生層、電荷輸送層及び表面保護層に機能分離され
た積層型感光体である請求項1記載の電子写真感光体。
10. The electrophotographic photoreceptor according to claim 1, wherein the layer constitution of the electrophotographic photoreceptor is a laminate type photoreceptor in which a charge generation layer, a charge transport layer and a surface protective layer are functionally separated on an intermediate layer.
【請求項11】 請求項1記載の電子写真感光体を備え
た電子写真装置。 【0001】
11. An electrophotographic apparatus comprising the electrophotographic photosensitive member according to claim 1. [0001]
JP6302715A 1994-11-14 1994-11-14 Electrophotographic photoreceptor and electrophotographic apparatus provided with the electrophotographic photoreceptor Expired - Fee Related JP3055861B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6302715A JP3055861B2 (en) 1994-11-14 1994-11-14 Electrophotographic photoreceptor and electrophotographic apparatus provided with the electrophotographic photoreceptor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6302715A JP3055861B2 (en) 1994-11-14 1994-11-14 Electrophotographic photoreceptor and electrophotographic apparatus provided with the electrophotographic photoreceptor

Publications (2)

Publication Number Publication Date
JPH08137120A JPH08137120A (en) 1996-05-31
JP3055861B2 true JP3055861B2 (en) 2000-06-26

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ID=17912309

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Country Link
JP (1) JP3055861B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100349070C (en) * 2004-11-25 2007-11-14 同济大学 Azo/phthalocyanine composite single layer organic photoconductor and preparing method therefor

Also Published As

Publication number Publication date
JPH08137120A (en) 1996-05-31

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