JPH01312576A - Method of restoring electrophotographic sesitive body from fatigue - Google Patents
Method of restoring electrophotographic sesitive body from fatigueInfo
- Publication number
- JPH01312576A JPH01312576A JP14531788A JP14531788A JPH01312576A JP H01312576 A JPH01312576 A JP H01312576A JP 14531788 A JP14531788 A JP 14531788A JP 14531788 A JP14531788 A JP 14531788A JP H01312576 A JPH01312576 A JP H01312576A
- Authority
- JP
- Japan
- Prior art keywords
- group
- charge
- photoreceptor
- fatigue
- 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.)
- Pending
Links
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- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920002102 polyvinyl toluene Polymers 0.000 description 1
- RCYFOPUXRMOLQM-UHFFFAOYSA-N pyrene-1-carbaldehyde Chemical compound C1=C2C(C=O)=CC=C(C=C3)C2=C2C3=CC=CC2=C1 RCYFOPUXRMOLQM-UHFFFAOYSA-N 0.000 description 1
- 125000001725 pyrenyl group Chemical group 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- PJANXHGTPQOBST-UHFFFAOYSA-N stilbene Chemical class C=1C=CC=CC=1C=CC1=CC=CC=C1 PJANXHGTPQOBST-UHFFFAOYSA-N 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 125000001174 sulfone group Chemical group 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- UGNWTBMOAKPKBL-UHFFFAOYSA-N tetrachloro-1,4-benzoquinone Chemical compound ClC1=C(Cl)C(=O)C(Cl)=C(Cl)C1=O UGNWTBMOAKPKBL-UHFFFAOYSA-N 0.000 description 1
- NLDYACGHTUPAQU-UHFFFAOYSA-N tetracyanoethylene Chemical group N#CC(C#N)=C(C#N)C#N NLDYACGHTUPAQU-UHFFFAOYSA-N 0.000 description 1
- PCCVSPMFGIFTHU-UHFFFAOYSA-N tetracyanoquinodimethane Chemical compound N#CC(C#N)=C1C=CC(=C(C#N)C#N)C=C1 PCCVSPMFGIFTHU-UHFFFAOYSA-N 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 1
- 150000001651 triphenylamine derivatives Chemical class 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Photoreceptors In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
投宜分互
本発明は特定のアゾ系電荷発生物質を用いた有機系電子
写真感光体の疲労回復方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for recovering from fatigue of an organic electrophotographic photoreceptor using a specific azo charge generating substance.
丈米伎亙
電子写真用感光体として近年、セレン感光体のような無
機系感光体に比べて価格、生産性及び公害上の点で有利
な有機系感光体が使用され始めている。有機系感光体は
基本的には支持体上に有機光導電層を設けたもので、そ
の種類としてはPVK(ポリビニルカルバゾール)のよ
うな有機光導電体単独型; PVK−TNF(2,4゜
7−ドリニトロフルオレノン)のような電荷移動錯体型
;フタロシアニン顔料のような有機光導電体〜樹脂分散
型;電荷発生層−電荷移動層の機能分離型などが知られ
ているが、中でも機能分離型のものが注目されている。In recent years, organic photoreceptors have begun to be used as photoreceptors for electrophotography, as they are more advantageous in terms of cost, productivity, and pollution than inorganic photoreceptors such as selenium photoreceptors. Organic photoreceptors basically have an organic photoconductive layer provided on a support, and the types include a single organic photoconductor type such as PVK (polyvinylcarbazole); PVK-TNF (2.4° Charge transfer complex type such as 7-dolinitrofluorenone); organic photoconductor-resin dispersion type such as phthalocyanine pigment; functionally separated type of charge generation layer and charge transfer layer. Types are attracting attention.
しかし従来の有機系感光体は前露光疲労が大きいため、
帯電性が低く、また暗中での電荷保持性が悪い(暗減衰
が大きい)上、繰返し使用による、これら特性の劣化、
即ち疲労が大きく1次第に残留電位が蓄積して画像上に
、濃度ムラ、カブリ、また反転現像の場合、地汚れを生
ずるという欠点を有している。そこでこれらの欠点を解
消するために例えば機能分離型のものでは支持体と電荷
発生層との間にSin、AQ、O,等の無機材料層を設
けたり、電荷発生層中にAらO,(特開昭55−142
354号公報)や金属粉末(特開昭60−214364
号公報)を含有させることが知られている。However, conventional organic photoreceptors suffer from significant pre-exposure fatigue.
It has low chargeability, poor charge retention in the dark (large dark decay), and deterioration of these characteristics due to repeated use.
That is, it has the disadvantage that fatigue is large and residual potential gradually accumulates, causing density unevenness, fogging, and, in the case of reverse development, scumming on the image. Therefore, in order to eliminate these drawbacks, for example, in a functionally separated type, an inorganic material layer such as Sin, AQ, O, etc. is provided between the support and the charge generation layer, or a layer of A, O, etc. is provided in the charge generation layer. (Unexamined Japanese Patent Publication No. 55-142
No. 354) and metal powder (Japanese Unexamined Patent Publication No. 60-214364)
It is known to contain the following.
また機能分離型に限らず、一般の有機系感光体に下引層
としてポリアミド樹脂(特開昭58−30757号公報
、特開昭58−98739号公報)、アルコール可溶性
ポリアミド樹脂(特開昭60−196766号公報)、
水溶性ポリビニルブチラール樹脂(特開昭60−232
553号公報)、ポリビニルブチラール樹脂(特開昭5
8−106549号公報)などの樹脂層を設けることが
提案されている。In addition to functionally separated type photoreceptors, polyamide resins (JP-A-58-30757, JP-A-58-98739), alcohol-soluble polyamide resins (JP-A-60) are used as subbing layers for general organic photoreceptors. -196766),
Water-soluble polyvinyl butyral resin (JP-A-60-232
No. 553), polyvinyl butyral resin (Japanese Unexamined Patent Publication No. 553
It has been proposed to provide a resin layer such as Japanese Patent No. 8-106549).
しかし以上のような有機系感光体は繰返し使用による帯
電性及び電荷保持性の低下防止については未だ不充分で
あり、いっそうの改善が望まれていた。However, the organic photoreceptors described above are still insufficient in preventing deterioration in chargeability and charge retention due to repeated use, and further improvements have been desired.
一方、複写装置の使用環境においては、感光体の種類を
問わず、高温高湿下では画像ボケ、画像濃度低下等を生
じ、また、低温時においては感光体の結露、地汚れ等の
問題を有し、ている。On the other hand, in the usage environment of copying machines, regardless of the type of photoreceptor, under high temperature and high humidity conditions, images may become blurred and image density may decrease, and at low temperatures, problems such as dew condensation on the photoreceptor and background smudges may occur. have and are.
このような感光体の環境依存性に関しては特開昭61−
7843号公報では感光層下の支持体を面状発熱体とし
て比較的低温に加熱することにより高温高湿下における
感光体の相対湿度を減少できることが開示されている6
特開昭62−12]、482号公報には感光体に温風又
は冷風を吹きつける方法が開示されており、低温時の感
光体への結露や高温時の感光体の劣化が防止できるとあ
る。Regarding the environmental dependence of photoreceptors, please refer to Japanese Patent Application Laid-open No. 61-
Publication No. 7843 discloses that the relative humidity of the photoreceptor under high temperature and high humidity conditions can be reduced by heating the support under the photoreceptor layer to a relatively low temperature using a planar heating element6.
JP-A No. 62-12] and No. 482 disclose a method of blowing hot or cold air onto a photoreceptor, which is said to prevent dew condensation on the photoreceptor at low temperatures and deterioration of the photoreceptor at high temperatures. be.
旦−一コケ
本発明の目的は繰返し使用により疲労した特定の有機系
感光体を熱処理することにより疲労を回復すると共に、
環境依存性を改善し得る電子写真感光体の疲労回復方法
を提供することである。The purpose of the present invention is to heat-treat a specific organic photoreceptor that has become fatigued due to repeated use, and to recover the fatigue.
An object of the present invention is to provide a method for recovering from fatigue of an electrophotographic photoreceptor that can improve environmental dependence.
遭−一一戊
本発明による電子写真感光体の疲労回復方法は導電性支
持体上に電荷発生物質として下記−般式(I)〜(II
I)で示されるアゾ顔料の少くとも1種と、電荷輸送物
質とを主成分とする感光層を設けてなり、少(とも帯電
及び露光の工程を繰返すことにより疲労した有機系電子
写真感光体を加熱処理することを特徴とするものである
。In the method for recovering from fatigue of an electrophotographic photoreceptor according to the present invention, the following general formulas (I) to (II) are applied as charge generating substances on a conductive support.
The organic electrophotographic photoreceptor is provided with a photosensitive layer containing at least one azo pigment shown in I) as a main component and a charge transport substance, and the organic electrophotographic photoreceptor is made of organic electrophotographic photoreceptor that has become fatigued due to repeated charging and exposure steps. It is characterized by subjecting it to heat treatment.
(式中Cpはカップラー残基を表わす。)前述のように
電子写真感光体は無機系、有機系に限らず、繰返し使用
、即ち少くとも帯電及び露光の工程を繰返すことにより
帯電性、電荷保持性等の特性劣化、即ち疲労を生じる。(In the formula, Cp represents a coupler residue.) As mentioned above, electrophotographic photoreceptors, regardless of whether they are inorganic or organic, can be used repeatedly, that is, at least through repeated charging and exposure steps, to improve chargeability and charge retention. This results in deterioration of properties such as strength, ie fatigue.
本発明者らは特定の有機系感光体に生じた疲労が加熱処
理(暗中で行なう)により回復できることを見出し、本
発明に到達した。The present inventors have discovered that fatigue caused in a specific organic photoreceptor can be recovered by heat treatment (performed in the dark), and have arrived at the present invention.
本発明方法で用いられる有機系電子写真感光体自体の構
造は従来と全く同じである。構造例としては第1〜4図
に示すものが挙げられる。The structure of the organic electrophotographic photoreceptor itself used in the method of the present invention is exactly the same as the conventional one. Examples of the structure include those shown in FIGS. 1 to 4.
即ち、第1図の感光体は導電性支持体11上に感光層1
4を単層構成で設けたものである。第2図(a)及び(
b)の感光体は感光層14が電荷発生層21と電荷輸送
層22との積層で構成されたものである。第3図及び第
4図は第1〜2図の変形例であって、第3図は導電性支
持体11と感光層14との間に中間層13を設けたもの
であり、また第4図は感光層14の上に絶縁性保護層1
5を設けたものである。That is, the photosensitive member shown in FIG. 1 has a photosensitive layer 1 on a conductive support 11.
4 in a single layer configuration. Figure 2 (a) and (
In the photoreceptor b), the photoreceptor layer 14 is composed of a charge generation layer 21 and a charge transport layer 22 stacked together. 3 and 4 are modified examples of FIGS. 1 and 2, in which an intermediate layer 13 is provided between the conductive support 11 and the photosensitive layer 14, and FIG. The figure shows an insulating protective layer 1 on a photosensitive layer 14.
5.
導電性支持体11としては、体積抵抗1010Ω口以下
の導電性を示すもの、例えば、アルミニウム、ニッケル
、クロム、ニクロム、銅、銀、金、白金などの金属、酸
化スズ、酸化インジウムなどの金属酸化物をフィルム状
もしくはドラム状のプラスチックや紙に被覆したもの、
あるいはアルミニウム、アルミニウム合金、ニッケル、
ステンレス等の板、ベルト、ドラム等が挙げられる。As the conductive support 11, materials exhibiting conductivity with a volume resistance of 1010 Ω or less are used, such as metals such as aluminum, nickel, chromium, nichrome, copper, silver, gold, and platinum, and metal oxides such as tin oxide and indium oxide. Things covered in film or drum-like plastic or paper;
Or aluminum, aluminum alloy, nickel,
Examples include stainless steel plates, belts, drums, etc.
感光層14は単層型の場合は電荷発生物質と電荷輸送物
質及びバインダー樹脂を主成分として構成される。一方
、積層型の場合は感光層14は前述のような電荷発生層
21と電荷輸送層22とからなるが、この電荷発生層2
1は電荷発生物質を主成分として構成され、また電荷輸
送層22は電荷輸送物質及びバインダー樹脂を主成分と
して構成される。In the case of a single layer type, the photosensitive layer 14 is mainly composed of a charge generating material, a charge transporting material, and a binder resin. On the other hand, in the case of a laminated type, the photosensitive layer 14 consists of the charge generation layer 21 and the charge transport layer 22 as described above;
1 is composed mainly of a charge generating substance, and the charge transport layer 22 is composed mainly of a charge transporting substance and a binder resin.
電荷発生物質としては、前記一般式(I)〜(III)
で示されるアゾ顔料が使用される。但し一般式(I)の
場合は中心骨格によって更に次のように分類される。As the charge generating substance, the above general formulas (I) to (III) are used.
The azo pigment shown is used. However, in the case of general formula (I), it is further classified as follows depending on the central skeleton.
(イ)環 (ロ)環 (ハ)環
これら一般式(1)〜(m)中のカップラー残基Cpと
しては、たとえばフェノール類、ナフ、トール類などの
フェノール性水酸基を有する化合物、アミノ基を有する
芳香族アミノ化合物あるいはアミノ基とフェノール性水
酸基を有するアミノナフトール類、脂肪族もしくは芳香
族のエノール性ケトン基を有する化合物(活性メチレン
基を有する化合物)などが用いられ、好ましくは下記一
般式(1)〜(11)で表わされるものである。(a) Ring (b) Ring (c) Ring As the coupler residue Cp in these general formulas (1) to (m), examples include compounds having a phenolic hydroxyl group such as phenols, naphs, and tols, and amino groups. An aromatic amino compound having the following formula or aminonaphthols having an amino group and a phenolic hydroxyl group, a compound having an aliphatic or aromatic enolic ketone group (compound having an active methylene group), etc. are used, and preferably the following general formula These are expressed by (1) to (11).
〔上記式(1)、(2)、(3)および(4)中、x。[In the above formulas (1), (2), (3) and (4), x.
Y工、Z、mおよびnはそれぞれ以下のものを表わす。Y, Z, m and n each represent the following.
(R工およびR2は水素または置換もしくは無置換のア
ルキル基を表わし、R1は置換もしくは無置換のアルキ
ル基また
は置換もしくは無置換のアリール基を
表わす。)
Vよ:水素、ハロゲン、置換もしくは無置換のアルキル
基、置換もしくは無置換の
アルコキシ基、カルボキシ基、スルホ
ン基、置換もしくは無置換のスルファ
(R4は水素、アルキル基またはその置換体、フェニル
基またはその置換体を
表わし、Y2は炭化水素環基またはその置換体、複素環
基またはその置換体、
炭化水素環基またはその置換体、複素
環基またはその置換体あるいはスチリ
ル基またはその置換体、R6は水素、アルキル基、フェ
ニル基またはその置換
体を表わすか、あるいはR6及びR6はそれらに結合す
る炭素原子と共に環を形
成してもよい。)を示す。)
Z:炭化水素環またはその置換体あるいは複素環または
その置換体
n:1または2の整数
m:1または2の整数〕
〔式(5)および(6)中、R1は置換もしくは無置換
の炭化水素基を表わし、Xは前記に同じである。〕
Ar1
〔式中、R,はアルキル基、カルバモイル基、カルボキ
シル基またはそのエステルを表わし、Ar1は炭化水素
環基またはその置換体を表わし、Xは前記と同じである
。〕
〔上記式(8)および(9)中、R9は水素または置換
もしくは無置換の炭化水素基を表わし、Ar、は炭化水
素環基またはその置換体を表わす、〕
前記一般式(1)、(2)、 (3)または(4)の2
の炭化水素環としてはベンゼン環、ナフタレン環などが
例示でき、また複素環(置換基を持っていてもよい)と
してはインドール環、カルバゾール環、ベンゾラン環、
ジベンゾフラン環などが例示できる。2の環における置
換基としては塩素原子、臭素原子などのハロゲン原子が
例示できる。(R and R2 represent hydrogen or a substituted or unsubstituted alkyl group, and R1 represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group.) V: hydrogen, halogen, substituted or unsubstituted an alkyl group, a substituted or unsubstituted alkoxy group, a carboxy group, a sulfone group, a substituted or unsubstituted sulfa group (R4 represents hydrogen, an alkyl group or a substituted product thereof, a phenyl group or a substituted product thereof, and Y2 is a hydrocarbon ring group or a substituent thereof, a heterocyclic group or a substituent thereof, a hydrocarbon ring group or a substituent thereof, a heterocyclic group or a substituent thereof, a styryl group or a substituent thereof, R6 is hydrogen, an alkyl group, a phenyl group or a substituent thereof or R6 and R6 may form a ring together with the carbon atoms bonded to them. ) Z: hydrocarbon ring or its substituted product, or heterocycle or its substituted product n: an integer of 1 or 2 m: an integer of 1 or 2] [In formulas (5) and (6), R1 is a substituted or unsubstituted It represents a hydrocarbon group, and X is the same as above. ] Ar1 [In the formula, R represents an alkyl group, a carbamoyl group, a carboxyl group, or an ester thereof, Ar1 represents a hydrocarbon ring group or a substituent thereof, and X is the same as above. ] [In the above formulas (8) and (9), R9 represents hydrogen or a substituted or unsubstituted hydrocarbon group, and Ar represents a hydrocarbon ring group or a substituted product thereof.] The above general formula (1), (2), (3) or (4)-2
Examples of the hydrocarbon ring include a benzene ring and a naphthalene ring, and examples of the heterocycle (which may have a substituent) include an indole ring, a carbazole ring, a benzolane ring,
Examples include a dibenzofuran ring. Examples of the substituent in ring 2 include halogen atoms such as chlorine atom and bromine atom.
Y2またはR2における炭化水素環基としては、フェニ
ル基、ナフチル基、アントリル基、ピレニル基などが、
また、複素環基としてはピリジル基、チエニル基、フリ
ル基、インドリル基、ベンゾフラニル基、カルバゾリル
基、ジベンゾフラニル基などが例示でき、さらに、R9
およびRGが結合して形成する環としては、フルオレン
環などが例示できる。Examples of the hydrocarbon ring group in Y2 or R2 include phenyl group, naphthyl group, anthryl group, pyrenyl group, etc.
Examples of the heterocyclic group include a pyridyl group, thienyl group, furyl group, indolyl group, benzofuranyl group, carbazolyl group, and dibenzofuranyl group.
Examples of the ring formed by bonding and RG include a fluorene ring and the like.
Y2またはRsの炭化水素環基または複素環基あるいは
R6およびR6によって形成される環における置換基と
しては、メチル基、エチル基。Examples of substituents on the hydrocarbon ring group or heterocyclic group of Y2 or Rs or the ring formed by R6 and R6 include a methyl group and an ethyl group.
プロピル基、ブチル基などのアルキル基、メトキシ基、
エトキシ基、プロポキシ基、ブトキシ基などのアルコキ
シ基、塩素原子、臭素原子などのハロゲン原子、ジメチ
ルアミノ基、ジエチルアミノ基などのジアルキルアミノ
基、トリフルオロメチル基などのハロメチル基、ニトロ
基。Alkyl groups such as propyl and butyl groups, methoxy groups,
Alkoxy groups such as ethoxy, propoxy and butoxy groups, halogen atoms such as chlorine and bromine, dialkylamino groups such as dimethylamino and diethylamino groups, halomethyl groups such as trifluoromethyl, and nitro groups.
シアノ基、カルボキシル基またはそのエステル、水酸基
、−5o3Naなとのスルホン酸塩基などが挙げられる
。Examples include a cyano group, a carboxyl group or an ester thereof, a hydroxyl group, and a sulfonic acid group such as -5o3Na.
R4のフェニル基の置換体としては塩素原子または臭素
原子などのハロゲン原子が例示できる。Examples of substituents for the phenyl group of R4 include halogen atoms such as chlorine atoms and bromine atoms.
R7またはR,における炭化水素基の代表例としては、
メチル基、エチル基、プロピル基、ブチル基などのアル
キル基、フェニル基などのアリール基またはこれらの置
換体が例示できる。Representative examples of the hydrocarbon group in R7 or R are:
Examples include alkyl groups such as methyl, ethyl, propyl and butyl groups, aryl groups such as phenyl, and substituted products thereof.
R7またはR9の炭化水素基における置換基としては、
メチル基、エチル基、プロピル基、ブチル基などのアル
キル基、メトキシ基、エトキシ基、プロポキシ基、ブト
キシ基などのアルコキシ基、塩素原子、臭素原子などの
ハロゲン原子、水酸基、ニトロ基などが例示できる。As a substituent in the hydrocarbon group of R7 or R9,
Examples include alkyl groups such as methyl, ethyl, propyl, and butyl groups; alkoxy groups such as methoxy, ethoxy, propoxy, and butoxy; halogen atoms such as chlorine and bromine; hydroxyl and nitro groups. .
Ar□またはAr、における炭化水素環基としては、フ
ェニル基、ナフチル基などがその代表例であり、また、
これらの基における置換基としては、メチル基、エチル
基、プロピル基、ブチル基などのアルキル基、メトキシ
基、エトキシ基、プロポキシ基、ブトキシ基などのアル
コキシ基、ニトロ基、塩素原子、臭素原子などのハロゲ
ン原子、シアノ基、ジメチルアミノ基、ジエチルアミノ
基などのジアルキルアミノ基などが例示できる。Typical examples of the hydrocarbon ring group in Ar□ or Ar are phenyl group, naphthyl group, etc.
Substituents for these groups include alkyl groups such as methyl, ethyl, propyl, and butyl, alkoxy groups such as methoxy, ethoxy, propoxy, and butoxy, nitro, chlorine, bromine, etc. Examples include halogen atoms, dialkylamino groups such as cyano groups, dimethylamino groups, and diethylamino groups.
また、Xの中では特に水酸基が適当である。Furthermore, among X, a hydroxyl group is particularly suitable.
上記カップラー残基の中でも好ましいのは上記一般式(
2)、(5)、(6)、 (7)、(8)および(9)
で示されるものであり、この中でも一般式におけるXが
水酸基のものが好ましい。また、この中でも一般式(1
0)
(YlおよびZは前記に同じ、)
で表わされるカップラー残基が好ましく、さらに好まし
くは一般式
(Z、 Y2およびR2は前記に同じ、)で表わされる
カップラー残基である。Among the above coupler residues, preferred is the general formula (
2), (5), (6), (7), (8) and (9)
Among these, those in which X in the general formula is a hydroxyl group are preferred. Also, among these, the general formula (1
0) (Yl and Z are the same as above) A coupler residue represented by the following is preferable, and a coupler residue represented by the general formula (Z, Y2 and R2 are the same as above) is more preferable.
さらにまた、上記好ましいカップラー残基の中でも一般
式(12)または(13)
1、Z/’
1、z7
(Z、 R,、RsおよびR6は前記に同じであり。Furthermore, among the above-mentioned preferred coupler residues, those having the general formula (12) or (13) 1, Z/' 1, z7 (Z, R, , Rs and R6 are the same as above).
またR1゜とじては上記のY2の置換基が例示できる。Examples of R1° include the above-mentioned substituents for Y2.
) で表わされるものが適当である。) The one expressed as is appropriate.
以下にカップラー残基Cpの具体例を示す。Specific examples of the coupler residue Cp are shown below.
(続)
従って一般式(1)〜(m)で示されるジスアゾ又はト
リスアゾ顔料の具体例はこれら一般式に前記カップラー
残基Cpの具体例を入れたものであるが、後記実施例で
は簡略化のため、前記−般式のNo、とCpNo 、ど
の組合せで示した9例えば式
で示されるアゾ顔料はr I−(2)−5J(但しI−
(2)は一般式(1)の中心骨格Naを表わし、また5
はCpNoを表わす。)のように表わし、また式、で示
されるアゾ顔料はrn−17J (但し■は一般式■の
中心骨格を表わし、また17はCP&を表わす、)のよ
うに表わす。(Continued) Therefore, specific examples of disazo or trisazo pigments represented by general formulas (1) to (m) include specific examples of the coupler residue Cp in these general formulas, but in the examples below, they are simplified. For example, the azo pigment represented by the formula is rI-(2)-5J (however, I-
(2) represents the central skeleton Na of general formula (1), and 5
represents CpNo. ), and the azo pigment represented by the formula is represented as rn-17J (where ■ represents the central skeleton of the general formula ■, and 17 represents CP&).
いずれにしても以上のような電荷発生物質は単独又は2
種以上混合して使用される。In any case, the above charge generating substances may be used alone or in combination.
Used as a mixture of more than one species.
一方、電荷輸送物質としては正孔輸送物質及び電子輸送
物質のいずれも使用できる。On the other hand, as the charge transport material, either a hole transport material or an electron transport material can be used.
正孔輸送物質としては、ポリ−N−ビニルカルバゾール
およびその誘導体、ポリーγ−カルバゾリルエチルグル
タメートおよびその誘導体、ピレン−ホルムアルデヒド
縮金物およびその誘導体、ポリビニルピレン、ポリビニ
ルフェナントレン、オキサゾール誘導体、オキサジアゾ
ール誘導体、イミダゾール誘導体、トリフェニルアミン
誘導体、9−(p−ジエチルアミノスチリル)アントラ
セン、1,1−ビス−(4−ジベンジルアミノフェニル
)プロパン、スチリルアントラセン、スチリルピラゾリ
ン、フェニルヒドラゾン類、α−フェニルスチルベン誘
導体、ベンジジン誘導体等の電子供与性物質が挙げられ
る。As hole transport substances, poly-N-vinylcarbazole and its derivatives, poly-γ-carbazolylethyl glutamate and its derivatives, pyrene-formaldehyde condensate and its derivatives, polyvinylpyrene, polyvinylphenanthrene, oxazole derivatives, oxadiazole Derivatives, imidazole derivatives, triphenylamine derivatives, 9-(p-diethylaminostyryl)anthracene, 1,1-bis-(4-dibenzylaminophenyl)propane, styrylanthracene, styrylpyrazoline, phenylhydrazones, α-phenyl Examples include electron-donating substances such as stilbene derivatives and benzidine derivatives.
電子輸送物質としては、例えばクロルアニル、ブロムア
ニル、テトラシアノエチレン、テトラシアノキノジメタ
ン、2,4.7−ドリニトロー9−フルオレノン、2,
4,5.7−テトラニトロ−9−フルオレノン、2,4
,5.7−テトラニトロキサントン、2,4.8−トリ
ニトロチオキザントン、2,6.8−トリニトロ−4H
−インデノ[1,2−b]チオフェン−4−オン、1.
3.7−ドリニトロジベンゾチオフエンー5,5−ジオ
キサイドなどの電子受容性物質が挙げられる。Examples of electron transport substances include chloranil, bromoanil, tetracyanoethylene, tetracyanoquinodimethane, 2,4.7-dolinitro-9-fluorenone, 2,
4,5.7-tetranitro-9-fluorenone, 2,4
, 5.7-tetranitroxanthone, 2,4.8-trinitrothioxanthone, 2,6.8-trinitro-4H
-indeno[1,2-b]thiophen-4-one, 1.
Examples include electron-accepting substances such as 3,7-dolinitrodibenzothiophene-5,5-dioxide.
これら電荷輸送物質の中でも下記一般式(a)〜(n)
に示される化合物が好ましい。Among these charge transport substances, the following general formulas (a) to (n)
Compounds shown in are preferred.
R,R4 (式中、R1,R,、R3およびR4は水素原子。R, R4 (In the formula, R1, R,, R3 and R4 are hydrogen atoms.
置換もしくは無置換の低級アルキル基、置換もしくは無
置換のアリール基を表わし、Ar1は置換又は無置換の
アリール基を表わし、Ar、は置換又は無置換のアリー
レン基を表わし、A r LとRoは共同で環を形成し
てもよく、またnは0又は1の整数である。)(但しR
□は低級′フルキル基、低級アルコキシ基又はハロゲン
原子を表わし、nはO〜4の整数を表わし、R2,R3
は同一でも異なっていてもよく、水素原子、低級アルキ
ル基、低級アルコキシ基又はハロゲン原子を表わす、)
(式中、R1は炭素数1〜11のアルキル基、置換又は
非置換のフェニル基あるいは複素環残基を表わし、 R
,、R,はそれぞれ同一でも異なっていてもよく、水素
原子、低級アルキル基、C1〜C4のヒドロキシアルキ
ル基、C工〜C4のクロルアルキル基、あるいは置換又
は非置換のアラルキル基を表わし、またR2とR1は共
同で窒素を含む複素環を形成してもよく、R4,R,は
それぞれ同一でも異なっていてもよく、水素原子、低級
アルキル基、低級アルコキシ基又はハロゲン原子を表わ
す。)
〔式中、R1は水素原子又はハロゲン原子を表わし、R
2は置換または非置換の芳香族残基あるいは複素環残基
(但し前記置換基はハロゲン、シアノ、ジ低級アルキル
アミノ、置換又は非置換のジアラルキルアミノ基、低級
アルキル基、低級アルコキシ基及びニトロ基よりなる群
から選ばれる。)を表わす、〕
〔式中、 R,、R,は水素原子、低級アルキル基、低
級アルコキシ基、あるいはジ低級アルキルアミノ基を表
わし、R8は水素原子、低級アルキル基、低級アルコキ
シ基。represents a substituted or unsubstituted lower alkyl group, a substituted or unsubstituted aryl group, Ar1 represents a substituted or unsubstituted aryl group, Ar represents a substituted or unsubstituted arylene group, A r L and Ro represent They may jointly form a ring, and n is an integer of 0 or 1. ) (However, R
□ represents a lower 'furkyl group, lower alkoxy group or halogen atom, n represents an integer of O to 4, R2, R3
may be the same or different and represent a hydrogen atom, a lower alkyl group, a lower alkoxy group, or a halogen atom. Represents a ring residue, R
,,R, may be the same or different, and each represents a hydrogen atom, a lower alkyl group, a C1-C4 hydroxyalkyl group, a C-C4 chloroalkyl group, or a substituted or unsubstituted aralkyl group, and R2 and R1 may jointly form a nitrogen-containing heterocycle, and R4 and R may each be the same or different and represent a hydrogen atom, a lower alkyl group, a lower alkoxy group, or a halogen atom. ) [In the formula, R1 represents a hydrogen atom or a halogen atom, and R
2 is a substituted or unsubstituted aromatic residue or a heterocyclic residue (however, the substituents include halogen, cyano, di-lower alkylamino, substituted or unsubstituted dialkylamino group, lower alkyl group, lower alkoxy group, and nitro [In the formula, R represents a hydrogen atom, a lower alkyl group, a lower alkoxy group, or a di-lower alkylamino group, and R8 represents a hydrogen atom, a lower alkyl group, or a di-lower alkylamino group. group, lower alkoxy group.
ハロゲン原子あるいはニトロ基を表わし、nはO又は1
を表わす、)
〔式中、Rはカルバゾリル基、ピリジル基、チエニル基
、インドリル基又はフリル基、あるいはそれぞれ置換ま
たは非置換のフェニル基、スチリル基、ナフチル基又は
アントリル基(但し前記置換基はジ低級アルキルアミノ
基、低級アルキル基、低級アルコキシ基、ハロゲン原子
、アラルキルアミノ基又は、アミノ基からなる群から選
ばれる)を表わす。〕
(式中、R工、 R,、R,は同一でも異なっていても
よく、水素原子、低級アルキル基、低級アルコキシ基、
フェニル基、フェノキシ基、またはハロゲン原子を表わ
す、)〔式中、R□は水素原子、ハロゲン原子、シアノ
基、低級アルキル基を表わし、Arは(ただし、R2,
R,、R,は水素原子、置換又は無置換の低級アルキル
基あるいは置換又は無置換のベンジル基を表わし、R4
,R。Represents a halogen atom or nitro group, n is O or 1
) [wherein R is a carbazolyl group, pyridyl group, thienyl group, indolyl group, or furyl group, or a substituted or unsubstituted phenyl group, styryl group, naphthyl group, or anthryl group (however, the above substituent is (selected from the group consisting of a lower alkylamino group, a lower alkyl group, a lower alkoxy group, a halogen atom, an aralkylamino group, or an amino group). ] (In the formula, R, R,, R, may be the same or different, and represent a hydrogen atom, a lower alkyl group, a lower alkoxy group,
represents a phenyl group, phenoxy group, or halogen atom) [wherein R represents a hydrogen atom, a halogen atom, a cyano group, or a lower alkyl group, and Ar represents (however, R2,
R,, R, represents a hydrogen atom, a substituted or unsubstituted lower alkyl group, or a substituted or unsubstituted benzyl group, and R4
,R.
は水素原子、ハロゲン原子、低級アルキル基あるいは低
級アルコキシ基又はジ低級アルキルアミノ基を表わす。represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, or a di-lower alkylamino group.
)を表わす。〕(式中、R,、R2,R,、R,、R,
は水素原子、ハロゲン原子、低級アルキル基、低級アル
コキシ基、置換又は無置換のジ低級アルキルアミノ基又
はジベンジルアミノ基を表わし、R5は低級アルキル基
又はベンジル基を表わす。)R
(式中、Arはナフタレン環、アントラセン環、スチリ
ル基及びそれらの置換体、あるいはピリジン環、フラン
環、チオフェン環を表わし、Rは低級アルキル基又はベ
ンジル基を表わす。)
(式中、R1は低級アルキル基、2−ヒドロキシエチル
基又は2−クロロエチル基を表わし、R2は低級アルキ
ル基、ベンジル基又はフェニル基を表わし、R1は水素
原子、ハロゲン原子、低級アルキル基、低級アルコキシ
基、ジ低級アルキルアミノ基又はニトロ基を表わす。)
R□
〔式中、R工は水素原子、低級アルキル基、クロルエチ
ル基又はヒドロキシエチル基を表わし、R,は水素原子
又はハロゲン原子を表わし、R7は低級アルキル基、ジ
低級アルキルアミノ基、ジアリールアミノ基、置換又は
無置換のスチリル基、置換又は無置換の芳香環残基(芳
香環又はベンゼン環。). ] (wherein R,, R2, R,, R,, R,
represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, a substituted or unsubstituted di-lower alkylamino group or a dibenzylamino group, and R5 represents a lower alkyl group or a benzyl group. )R (wherein, Ar represents a naphthalene ring, anthracene ring, styryl group, or a substituent thereof, or a pyridine ring, a furan ring, or a thiophene ring, and R represents a lower alkyl group or a benzyl group) (wherein, R1 represents a lower alkyl group, 2-hydroxyethyl group or 2-chloroethyl group, R2 represents a lower alkyl group, benzyl group or phenyl group, R1 represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, a (Represents a lower alkylamino group or nitro group.) R□ [In the formula, R represents a hydrogen atom, a lower alkyl group, a chloroethyl group, or a hydroxyethyl group, R represents a hydrogen atom or a halogen atom, and R7 represents a lower Alkyl group, di-lower alkylamino group, diarylamino group, substituted or unsubstituted styryl group, substituted or unsubstituted aromatic ring residue (aromatic ring or benzene ring).
ナフタレン環、アントラセン環等)、置換又は無置換の
複素環残基(複素環はピリジン環、キノキサリン環、カ
ルバゾール環等)を表わす。〕
〔式中、R1は低級アルキル基を表わし、R2は低級ア
ルキル基、ジ低級アルキルアミノ基、ジアリールアミノ
基、置換又は無置換のスチリル基、置換又は無置換の芳
香環残基(芳香環はベンゼン環、ナフタレン環、アント
ラセン環等)、置換又は無置換の複素環残基(複素環は
ピリジン環、キノキサリン環、カルバゾール環等)を表
わす。〕(式中、R1= R2は同一でも異なっていて
もよく、水素原子、低級アルキル基、ヒドロキシ低級ア
ルキル基、クロル低級アルキル基、アルキルの炭素数1
〜2のアシル基。(a naphthalene ring, anthracene ring, etc.), a substituted or unsubstituted heterocyclic residue (a heterocyclic ring is a pyridine ring, a quinoxaline ring, a carbazole ring, etc.). [In the formula, R1 represents a lower alkyl group, R2 represents a lower alkyl group, a di-lower alkylamino group, a diarylamino group, a substituted or unsubstituted styryl group, a substituted or unsubstituted aromatic ring residue (the aromatic ring is benzene ring, naphthalene ring, anthracene ring, etc.), substituted or unsubstituted heterocyclic residues (heterocycles include pyridine ring, quinoxaline ring, carbazole ring, etc.). ] (In the formula, R1=R2 may be the same or different, and hydrogen atom, lower alkyl group, hydroxy lower alkyl group, chloro lower alkyl group, alkyl having 1 carbon number
~2 acyl groups.
アルキルの炭素数5〜6のシクロアルキル基、あるいは
置換又は非置換の7ラルキル基を表わす。)
次に一般式(a)〜(n)の化合物の具体例を示す。It represents an alkyl cycloalkyl group having 5 to 6 carbon atoms, or a substituted or unsubstituted 7-ralkyl group. ) Next, specific examples of compounds of general formulas (a) to (n) are shown.
(以下余白)
(Rが下記基の場合)
似下余白)
(以下余白)
1 ・・・(j)
R
これらの電荷輸送物質は単独又は2種以上混合して用い
られる。(Hereafter, blank space) (When R is the following group) Similar lower margin) (Hereafter, blank space) 1...(j) R These charge transport substances may be used alone or in combination of two or more.
バインダー樹脂としては単層型、積層型(但し電荷輸送
層用)ともポリスチレン、スチレン−アクリロニトリル
共重合体、スチレン−ブタジェン共重合体、メチlノン
−無水マレイン酸共重合体、ポリエステル、ポリ塩化ビ
ニル、塩化ビニル−酢酸ビニル共重合体、ポリ酢酸ビニ
ル、ポリ塩化ビニリデン、ボリアリレート、フェノキシ
樹脂、ポリカーボネート、酢酸セルロース、エチルセル
ロース、ポリビニルブチラール、ボ −リビニル
ホルマール、ポリビニルトルエン、ポリ−N−ビニルカ
ルバゾール、ポリウレタン、アクリル樹脂、シリコーン
樹脂、エポキシ樹脂、メラミン樹脂、フェノール樹脂、
アルキッド樹脂等の熱可塑性または熱硬化性樹脂が使用
できるが、単層型の場合はさらにポリアミド、ポリケト
ン、ポリビニルケトン、ポリアクリルアミド等を併用す
ることができる。As the binder resin, polystyrene, styrene-acrylonitrile copolymer, styrene-butadiene copolymer, methyl non-maleic anhydride copolymer, polyester, polyvinyl chloride can be used for both single-layer type and laminated type (for charge transport layer). , vinyl chloride-vinyl acetate copolymer, polyvinyl acetate, polyvinylidene chloride, polyarylate, phenoxy resin, polycarbonate, cellulose acetate, ethyl cellulose, polyvinyl butyral, polyvinyl formal, polyvinyltoluene, poly-N-vinylcarbazole, Polyurethane, acrylic resin, silicone resin, epoxy resin, melamine resin, phenolic resin,
Thermoplastic or thermosetting resins such as alkyd resins can be used, but in the case of a single layer type, polyamides, polyketones, polyvinyl ketones, polyacrylamide, etc. can also be used in combination.
感光層の形成方法としては一般に単層型の場合は電荷発
生物質、電荷輸送物質及びバインダー樹脂をテトラヒド
ロフラン、ジオキサン、ト°ルエン、モノクロルベンゼ
ン、ジクロルエタン、シクロヘキサノン、塩化メチレン
などの溶剤等に溶解又は分散した液を浸漬塗布、スプレ
ー塗布、ロール塗布等の通常の塗布法で支持体上に塗布
し、乾燥する方法が、また積層型の場合は電荷発生物質
及び必要あれば後述するようなバインダー樹脂を溶解又
は分散した液を同様な塗布法で支持体上に塗布し、乾燥
して電荷発生層を形成し、また電荷輸送物質及びバイン
ダー樹脂を溶解又は分散した液を同様な塗布法で塗布し
、乾燥して電荷輸送層を形成する方法が採用される。こ
こで電荷発生層用バインダー樹脂としてはポリアミド、
ポリウレタン、ポリエステル、エポキシ樹脂、ポリケト
ン、ポリカーボネート、シリコーン樹脂、アクリル樹脂
、ポリビニルブチラール、ポリビニルホルマール、ポリ
ビニルケトン、ポリスチレン、ポリ−N−ビニルカルバ
ゾール、ポリアクリルアミド等が挙げられる。なお単層
型感光層または電荷輸送層には必要により可塑剤やレベ
リング剤等を添加することもできる。Generally, in the case of a single layer type photosensitive layer, a charge generating substance, a charge transporting substance, and a binder resin are dissolved or dispersed in a solvent such as tetrahydrofuran, dioxane, toluene, monochlorobenzene, dichloroethane, cyclohexanone, or methylene chloride. The solution can be coated onto a support by a conventional coating method such as dip coating, spray coating, or roll coating, and then dried, or in the case of a laminated type, a charge generating substance and, if necessary, a binder resin as described below, can be applied. A solution in which the charge transport substance and a binder resin are dissolved or dispersed is coated on a support by a similar coating method and dried to form a charge generation layer, and a solution in which the charge transport substance and a binder resin are dissolved or dispersed is coated in a similar coating method. A method of drying to form a charge transport layer is employed. Here, the binder resin for the charge generation layer is polyamide,
Examples include polyurethane, polyester, epoxy resin, polyketone, polycarbonate, silicone resin, acrylic resin, polyvinyl butyral, polyvinyl formal, polyvinyl ketone, polystyrene, poly-N-vinylcarbazole, polyacrylamide, and the like. Note that a plasticizer, a leveling agent, etc. may be added to the single-layer type photosensitive layer or the charge transport layer, if necessary.
いずれにしても感光層の厚さは単層型の場合は5〜10
0μm程度が適当であり、また積層型の場合は電荷発生
層については0.01〜5μm程度、電荷輸送層の場合
は5〜50μm程度が適当である。In any case, the thickness of the photosensitive layer is 5 to 10 in the case of a single layer type.
Appropriately, the thickness is about 0 μm, and in the case of a laminated type, the appropriate thickness is about 0.01 to 5 μm for the charge generation layer, and about 5 to 50 μm for the charge transport layer.
支持体11と感光層14との間に設けられる中間層13
は本発明の効果をいっそう向上すると共に、接着性を向
上する目的で設けられ、その材料としては5iO112
0,、シランカップリング剤、チタンカップリング剤、
クロムカップリング剤等の無機材料やポリアミド樹脂、
アルコール可溶性ポリアミド樹脂、水溶性ポリビニルブ
チラール、ポリビニルブチラール、PVA等の接着性の
良いバインダー樹脂などが使用される。その他、前記接
着性の良い樹脂にZnO,TiO2、ZnS等を分散し
たものも使用できる。中間層の形成法としては無機材料
単独の場合はスパッタリング、蒸着等の方法が、また有
機材料を用いた場合は通常の塗布法が採用される。なお
中間層の厚さは5μm以下が適当である。Intermediate layer 13 provided between support 11 and photosensitive layer 14
is provided for the purpose of further improving the effect of the present invention and improving adhesiveness, and its material is 5iO112.
0, silane coupling agent, titanium coupling agent,
Inorganic materials such as chromium coupling agents, polyamide resins,
Binder resins with good adhesive properties such as alcohol-soluble polyamide resin, water-soluble polyvinyl butyral, polyvinyl butyral, and PVA are used. In addition, resins in which ZnO, TiO2, ZnS, etc. are dispersed in the resin with good adhesive properties can also be used. As a method for forming the intermediate layer, when an inorganic material alone is used, methods such as sputtering or vapor deposition are used, and when an organic material is used, a normal coating method is used. Note that the thickness of the intermediate layer is suitably 5 μm or less.
保護層15は感光体の表面保護の目的で設けられ、これ
に使用される材料としてはABS樹脂、AC8樹脂、オ
レフィンルビニルモノマー共重合体、塩素化ポリエーテ
ル、アリル樹脂、フェノール樹脂、ポリアセタール、ポ
リアミド、ポリアミドイミド、ポリアクリレート、ポリ
アリルスルホン、ポリブチレン、ポリブチレンテレフタ
レート、ポリカーボネート、ポリエーテルスルホン、ポ
リエチレン、ポリエチレンテレフタレート、ポリイミド
、アクリル樹脂、ポリメチルペンテン、ポリプロピレン
、ポリフェニレンオキシド、ポリスルホン、ポリスチレ
ン、 AS樹脂、ブタジェン−スチレン共重合体、ポリ
ウレタン、ポリ塩化ビニル、ポリ塩化ビニリデン、エポ
キシ樹脂等の樹脂が挙げられる。保護層にはその他、耐
摩耗性を向上する目的でポリテトラフルオロエチレンの
ような弗素樹脂、シリコーン樹脂、及びこれら樹脂に酸
化チタン、酸化錫、チタン酸カリウム等の無機材料を分
散したもの等を添加することができる。保護層の形成法
としては通常の塗布法が採用される。なお保護層の厚さ
は0.5〜10μm程度が適当である。The protective layer 15 is provided for the purpose of protecting the surface of the photoreceptor, and materials used for this include ABS resin, AC8 resin, olefin rubinyl monomer copolymer, chlorinated polyether, allyl resin, phenol resin, polyacetal, Polyamide, polyamideimide, polyacrylate, polyallylsulfone, polybutylene, polybutylene terephthalate, polycarbonate, polyethersulfone, polyethylene, polyethylene terephthalate, polyimide, acrylic resin, polymethylpentene, polypropylene, polyphenylene oxide, polysulfone, polystyrene, AS resin, Examples include resins such as butadiene-styrene copolymer, polyurethane, polyvinyl chloride, polyvinylidene chloride, and epoxy resin. In addition, the protective layer may include fluororesins such as polytetrafluoroethylene, silicone resins, and inorganic materials such as titanium oxide, tin oxide, potassium titanate, etc. dispersed in these resins for the purpose of improving wear resistance. Can be added. A normal coating method is adopted as a method for forming the protective layer. Note that the thickness of the protective layer is suitably about 0.5 to 10 μm.
更に本発明では感光層14と保護層15との間に別の中
間層(図示せず)を設けることも可能である。Furthermore, in the present invention, it is also possible to provide another intermediate layer (not shown) between the photosensitive layer 14 and the protective layer 15.
以上のような有機系感光体は前述のように繰返し使用に
より疲労を生じる。本発明方法はこうして疲労した有機
系感光体を加熱処理(暗所で)により回復させるもので
ある。As mentioned above, the organic photoreceptor described above becomes fatigued by repeated use. The method of the present invention is to recover the fatigued organic photoreceptor by heat treatment (in the dark).
この熱処理法は特に限定されるものではないが、例えば
感光体の表面(感光側)又は裏面(支持体側)を赤外線
ランプ(熱線)、熱風、高周波、PTC発熱体(PTC
特性を有する発熱体)熱ローラ−(熱源として赤外線ラ
ンプ、 PTC発熱体、抵抗加熱器、熱媒体を通したヒ
ートパイプ等を内蔵するか、或いは表面を面状発熱体で
構成したもの)等で加熱する方法、或いは感光体の支持
体を面状発熱体で構成しくこの場合支持体はカーボン粉
、金属粉等の導電性物質を充電したプラスチックフィル
ムで構成するか、或いはこのような導電性プラスチック
を塗布、接着等の方法で積層して構成する)、これに直
流電流を通して加熱する方法等が挙げられる。これらの
方法は感光体の形状(通常、ベルト状又はドラム状)に
応じて適宜選択すればよいが、ドラム状感光体の場合は
前記熱ローラーに用いられるような熱源を内蔵させても
よい。またいずれの方法も温度調節ができるように冷風
、冷却パイプ等の冷却手段を併用してもよい。This heat treatment method is not particularly limited;
Heat rollers (with built-in heat sources such as infrared lamps, PTC heating elements, resistance heaters, heat pipes passing heat medium, etc., or whose surfaces are constructed with planar heating elements), etc. Alternatively, the support of the photoreceptor may be made of a planar heating element. In this case, the support may be made of a plastic film charged with a conductive substance such as carbon powder or metal powder, or may be made of such a conductive plastic. Examples include a method in which the material is laminated by coating, adhesion, etc.), and a method in which a direct current is passed through the material to heat it. These methods may be selected as appropriate depending on the shape of the photoreceptor (usually belt-shaped or drum-shaped); however, in the case of a drum-shaped photoreceptor, a heat source such as that used in the above-mentioned thermal roller may be incorporated. In either method, cooling means such as cold air or cooling pipes may be used in combination to adjust the temperature.
実際にこの熱処理法を本発明の特定の有機系感光体に適
用する場合、加熱は感光体の使用中、連続的に行なって
もよいし、断続的又は−時的〔使用初期、使用途中(例
えば疲労検知装置を取付けておいて疲労した時など)又
は使用直前のみ〕に行なってもよい。連続的に又は場合
により断続的に(加熱間隔が短かい場合)加熱する場合
、余り温度が低過ぎては効果がなく、また余り高過ぎて
は感光層にストレスを与えたり、破壊したりするので、
加熱温度は通常35〜100°C1好ましくは50〜8
0℃程度の範囲が適当である。−時的に又は場合により
断続的に(加熱間隔が長い場合)加熱する場合は使用時
間にもよるが、80℃より高温(最高150℃、好まし
くは120℃程度)でもよい。なお感光体の疲労回復に
は温度が高い程、また加熱時間が長い程、有効である。When this heat treatment method is actually applied to the specific organic photoreceptor of the present invention, heating may be carried out continuously during use of the photoreceptor, or may be performed intermittently or occasionally [at the beginning of use, during use ( For example, it may be performed when a fatigue detection device is attached and the user becomes fatigued) or only immediately before use]. When heating continuously or in some cases intermittently (with short heating intervals), if the temperature is too low it will not be effective, and if it is too high it will stress or destroy the photosensitive layer. So,
The heating temperature is usually 35-100°C, preferably 50-8°C.
A range of about 0°C is appropriate. - When heating occasionally or intermittently (when the heating interval is long), the temperature may be higher than 80°C (maximum 150°C, preferably about 120°C), depending on the usage time. Note that the higher the temperature and the longer the heating time, the more effective it is for recovering from fatigue of the photoreceptor.
また感光体の感度は温度が低い程、悪い傾向があるので
、この点からも感光体の熱処理は前記範囲内でできるだ
け高い温度で行なうことが好ましい。更にまたかなりの
高温で回復させる場合には(例えば100℃以上)複写
機又はプリンターを停止するか、或いは定着現像及び露
光部を感光体から離すことが好ましい。いずれにしても
感光体の熱処理は感光体を取出さずにそのまま複写機内
で行なってもよいし、或いは感光体を取出して複写機外
で行なってもよいことは勿論である。なお、複写機外で
熱処理する場合、遮光型の加熱装置を用いると便利であ
る。Furthermore, the sensitivity of the photoreceptor tends to be worse as the temperature is lower, so from this point of view as well, it is preferable to heat the photoreceptor at a temperature as high as possible within the above range. Furthermore, in the case of recovery at a considerably high temperature (for example, 100° C. or higher), it is preferable to stop the copying machine or printer, or to move the fixing, developing and exposing sections away from the photoreceptor. In any case, it goes without saying that the heat treatment of the photoreceptor may be performed within the copying machine without removing the photoreceptor, or may be performed outside the copying machine with the photoreceptor removed. Note that when heat treatment is performed outside the copying machine, it is convenient to use a light-shielding heating device.
以下に本発明を実施例によって説明する。なお部は全て
重量部である。The present invention will be explained below by way of examples. Note that all parts are parts by weight.
実施例1〜42
外径80nn、長さ340 mmのAQドラムに下記組
成の中間層形成液、電荷発生層形成液及び電荷輸送層形
成液を順次、浸漬塗布、乾燥して夫々3μm厚の中間層
、0.2μm厚の電荷発生層及び20μm厚の電荷輸送
層を形成することにより有機系電子写真感光体を作成し
た。Examples 1 to 42 An intermediate layer forming liquid, a charge generation layer forming liquid, and a charge transport layer forming liquid having the following compositions were sequentially applied by dip coating onto an AQ drum having an outer diameter of 80 nn and a length of 340 mm, and dried to form an intermediate layer having a thickness of 3 μm. An organic electrophotographic photoreceptor was prepared by forming a 0.2 μm thick charge generation layer and a 20 μm thick charge transport layer.
中間層形成液:
二酸化チタン 10部ト
ルイレン−2,4−ジイソシアネート 0.2
部2−ブタノン 10
0部4−メチル−2−ペンタノン
70部電荷発生層形成液:
表−1に記載のアゾ顔料 2部シク
ロヘキサノン 80部テトラ
ヒドロフラン 20部電荷輸送
層形成液:
表−1に記載の電荷輸送物質 8部テト
ラヒドロフラン 80部次に各
感光体を電子写真複写機(負帯電するように改造したリ
コー社製すコピーFT4060)にセットし、感光体ド
ラムの内側に設けた抵抗加熱器でドラムを52±2℃に
加熱しながら、5000枚の連続コピーを行ない、初期
(1枚目)及び5000枚目の表面電位を測定した。Intermediate layer forming liquid: Titanium dioxide 10 parts Toluylene-2,4-diisocyanate 0.2
Part 2-Butanone 10
0 parts 4-methyl-2-pentanone
70 parts Charge generation layer forming liquid: Azo pigment listed in Table 1 2 parts Cyclohexanone 80 parts Tetrahydrofuran 20 parts Charge transporting layer forming liquid: Charge transport substance listed in Table 1 8 parts Tetrahydrofuran 80 parts Next, each photoreceptor was It was set in an electrophotographic copying machine (Ricoh's Copy FT4060 modified to be negatively charged), and 5000 sheets were continuously printed while heating the drum to 52±2°C with a resistance heater installed inside the photoreceptor drum. Copies were made, and the surface potentials at the initial stage (first copy) and at the 5000th copy were measured.
比較のため、各実施例の感光体を加熱しなかった他は同
じ方法で連続コピーを行ない、同様にテストした。For comparison, continuous copying was performed in the same manner except that the photoreceptors of each example were not heated, and the same tests were conducted.
以上の結果を表−1に示す。なお比較例のNαは夫々実
施例のNαに対応するものである。The above results are shown in Table-1. Note that Nα of the comparative example corresponds to Nα of the example.
(以下同様)。(Same below).
表−1
表−I CM、)
表−1(W
表−1(続)
実施例43〜84
外径120+s+、長さ340mのAQドラムに下記組
成の電荷発生層形成液及び電荷輸送層形成液を順次、浸
漬塗布、乾燥して夫々0.2μm厚の電荷発生層及び2
2μm厚の電荷輸送層を形成することにより有機系電子
写真感光体を作成した。Table-1 Table-I CM, ) Table-1 (W Table-1 (Continued) Examples 43 to 84 Charge generation layer forming liquid and charge transport layer forming liquid having the following compositions were applied to an AQ drum with an outer diameter of 120+s+ and a length of 340 m. were sequentially applied by dip coating and dried to form a charge generating layer and a charge generating layer with a thickness of 0.2 μm, respectively.
An organic electrophotographic photoreceptor was prepared by forming a charge transport layer with a thickness of 2 μm.
電荷発生層形成液:
表−2に記載のアゾ顔料 3部シク
ロヘキサノン 150部2−
ブタノン 50部電荷
輸送層形成液:
表−2に記載の電荷輸送物質 9部塩化
メチレン 30部テトラ
ヒドロフラン 50部次に各感
光体を電子写真複写機(負帯電するように改造したリコ
ー社製すコピーFT6080)にセットし、500枚毎
にコピーを停止し、感光体ドラムの感光層側に設けた赤
外線ランプでドラムを75℃で12分間加熱した後、室
温に冷却し、再びコピーを開始するという方法で350
0枚の断続コピーを行なった。Charge generation layer forming liquid: Azo pigment listed in Table 2 3 parts Cyclohexanone 150 parts 2-
Butanone 50 parts Charge transport layer forming liquid: Charge transport material listed in Table 2 9 parts Methylene chloride 30 parts Tetrahydrofuran 50 parts Next, each photoreceptor was transferred to an electrophotographic copying machine (a Ricoh copy machine modified to be negatively charged). FT6080), stopping copying every 500 sheets, heating the drum at 75°C for 12 minutes using an infrared lamp installed on the photosensitive layer side of the photosensitive drum, cooling it to room temperature, and starting copying again. 350 in a way
Intermittent copying of 0 sheets was performed.
比較のため、各実施例の感光体に対し前記熱処理(冷却
工程も含む)を行なわず、その間コピーを停止した他は
同じ方法で断続コピーを行なった。For comparison, intermittent copying was performed using the same method except that the photoreceptors of each example were not subjected to the heat treatment (including the cooling step) and copying was stopped during that time.
得られたコピーの初期(1枚目)及び3500枚目の画
像濃度(ID)をマクベス濃度計で測定した。The image densities (ID) of the obtained copies at the initial stage (first copy) and at the 3500th copy were measured using a Macbeth densitometer.
以上の結果を表−2に示す。The above results are shown in Table-2.
(以下余白)
表−2
表−2(m
表−2(M)
実施例85〜126
外径80m++、長さ340mmのAQドラムに下記組
成の中間層形成液、電荷輸送層形成液、電荷発生層形成
液及び保護層形成液を順次、浸漬塗布、乾燥して夫々0
.3μm厚の中間層、18μm厚の電荷発生層、0.3
μm厚の電荷輸送層及び3μm厚の保護層を形成するこ
とにより有機系電子写真感光体を作成した。(Blank below) Table-2 Table-2 (m) Table-2 (M) Examples 85 to 126 An AQ drum with an outer diameter of 80 m++ and a length of 340 mm was filled with an intermediate layer forming liquid, charge transport layer forming liquid, and charge generation having the following composition. The layer forming liquid and the protective layer forming liquid were applied by dip coating and dried to 0.
.. 3 μm thick intermediate layer, 18 μm thick charge generation layer, 0.3
An organic electrophotographic photoreceptor was prepared by forming a μm-thick charge transport layer and a 3 μm-thick protective layer.
中間層形成液:
メタノール 60部ブ
タノール 40部電荷
輸送層形成液:
表−3に記載の電荷輸送物質 10部塩
化メチレン 75部電荷
発生層形成液:
表−3に記載の電荷発生物質 3部ポリ
エステル
(東洋紡績(株)バイロン200)
2部トルイレン−2,4−ジイソシアネート
0.1部シクロヘキサノン
100部テトラヒドロフラン
150部保護層形成液:
導電性酸化チタン 90部ト
ルエン 220部ブ
タノール 60部次に
各感光体の内面に面状発熱体を貼り付けた後、電子写真
複写機(■リコー製すコピーFT5050)にセットし
、感光体の表面電位が+700V以下に低下した時は直
ちにコピーを停止すると同時に面状発熱体に通電してド
ラムを100±5℃で10分間加熱した後、別途設けた
ファンで50℃に冷却し、ついで再びコピーを開始する
という方法で6000枚の断続コピーを行ない、初期(
1枚目)及び6000枚目の表面電位を測定した。Intermediate layer forming liquid: Methanol 60 parts Butanol 40 parts Charge transporting layer forming liquid: Charge transporting substance listed in Table 3 10 parts Methylene chloride 75 parts Charge generating layer forming liquid: Charge generating substance listed in Table 3 3 parts Polyester (Toyobo Co., Ltd. Byron 200)
2-part toluylene-2,4-diisocyanate
0.1 part cyclohexanone
100 parts tetrahydrofuran
150 parts Protective layer forming liquid: Conductive titanium oxide 90 parts Toluene 220 parts Butanol 60 parts Next, after pasting a sheet heating element on the inner surface of each photoreceptor, it was transferred to an electrophotographic copying machine (Copy FT5050 manufactured by Ricoh). set, and when the surface potential of the photoreceptor drops to below +700V, stop copying immediately, and at the same time turn on electricity to the planar heating element to heat the drum at 100±5℃ for 10 minutes, then heat the drum to 50℃ using a separately installed fan. The initial (
The surface potentials of the 1st sheet) and 6000th sheet were measured.
比較のため、各実施例に対応して前記熱処理(冷却工程
を含む)を行なわず、その間コピーを停止した他は同じ
方法で断続コピーを行ない、同様にテストした。For comparison, intermittent copying was performed in the same manner as in each Example except that the heat treatment (including the cooling step) was not performed and copying was stopped during that time, and tests were conducted in the same manner.
以上の結果を表−3に示す。The above results are shown in Table-3.
表−3
表−3(2)
表−3(続)
表−3(続)
実施例127〜168
Alll導電層を有する長尺のポリエステルフィルム支
持体上に下記組成の電荷発生層形成液及び電荷輸送層形
成液を順次、浸漬塗布、乾燥して夫々0.3μm厚の電
荷発生層及び22μm厚の電荷輸送層を形成後、両端部
を接合することにより有機系電子写真感光体ベルトを作
成した。Table-3 Table-3 (2) Table-3 (Continued) Table-3 (Continued) Examples 127 to 168 A charge generation layer forming liquid having the following composition and charge was formed on a long polyester film support having an All conductive layer. A transport layer forming liquid was sequentially applied by dip coating and dried to form a charge generation layer with a thickness of 0.3 μm and a charge transport layer with a thickness of 22 μm, respectively, and then both ends were joined to produce an organic electrophotographic photoreceptor belt. .
電荷発生層形成液:
表−4に記載のアゾ顔料 2部テト
ラヒドロフラン 80部エチル
セロソルブ 65部電荷輸送
層形成液:
表−4に記載の電荷輸送物質 8部テト
ラヒドロフラン 77部次に各
感光体を電子写真複写機((01リコ一製マイリコピー
M−5)(感光体ベルトを支持体側から支持する駆動ロ
ーラー及び複数個の従動ローラーのうち、従動ローラー
を、PTC発熱体を内蔵する熱ローラーとしたもの)に
セットし、複写機の始動時(ウオームアツプ時)だけP
TC発熱体に通電して熱ローラーを表面温度70±3℃
に加熱するという条件で始動(約12分間)→400枚
連続コピー→休止(15分間)のサイクルモードで40
00枚の断続コピーを行なった。Charge generation layer forming liquid: Azo pigment listed in Table 4 2 parts Tetrahydrofuran 80 parts Ethyl cellosolve 65 parts Charge transporting layer forming liquid: Charge transport material listed in Table 4 8 parts Tetrahydrofuran 77 parts Next, each photoreceptor was subjected to electron treatment. Photocopying machine ((01 Rikoichi's Mailicopy M-5) (Of the drive roller and multiple driven rollers that support the photoreceptor belt from the support side, the driven roller is a thermal roller with a built-in PTC heating element. ), and turn it on only when the copier starts (warms up).
The surface temperature of the heat roller is 70±3℃ by applying electricity to the TC heating element.
Start (about 12 minutes) → continuous copying of 400 sheets → pause (15 minutes) under the condition that the cycle mode is 40
00 copies were made intermittently.
こうして得られた初期(1枚目)及び4000枚目のコ
ピー画像濃度IDを測定した。The initial (first copy) and 4000th copy image density IDs thus obtained were measured.
比較のため熱ローラーの加熱を行なわなかった他は同じ
方法で断続コピーを行ない、同様に評価した。For comparison, intermittent copying was performed in the same manner except that the heat roller was not heated, and evaluation was made in the same manner.
以上の結果を表−4に示す。The above results are shown in Table-4.
表−4
表−4(m
表 −4(続)
表−4(樹
実施例169〜210
直径120叫、長さ340mn+のliミドラム下記組
成の中間層形成液、電荷発生層形成液及び電荷輸送層形
成液を順次、浸漬塗布、乾燥して夫々0.3μm厚の中
間層、0.2μm厚の電荷発生層及び20μm厚の電荷
輸送層を形成することにより有機系電子写真感光体を作
成した。Table-4 Table-4 (m Table-4 (Continued) Table-4 (Tree Examples 169 to 210) Intermediate layer forming liquid, charge generation layer forming liquid, and charge transport having the following compositions: 120mm diameter, 340mm+ length An organic electrophotographic photoreceptor was prepared by sequentially applying the layer forming solution by dip coating and drying to form an intermediate layer with a thickness of 0.3 μm, a charge generation layer with a thickness of 0.2 μm, and a charge transport layer with a thickness of 20 μm. .
中間層形成液:
水 1
50部メタノール 2
00部電荷発生層形成液:
表−5に記載のアゾ顔料 3部シ
クロヘキサノン 200部電
荷輸送層形成液:
表−6に記載の電荷輸送物質 8部ボリ
アリレート(ユニチカ■faU−100) 1
2部塩化メチレン 50
部1.2−ジクロロエタン 3
0部次に各感光体を電子写真複写機(負帯電するように
改造したーリコー製すコピーFT7050)にセットし
、4950枚の連続コピーを行なった後、感光体を複写
機から取出し、遮光型外部加熱装置(ドラム状面状発熱
体で感光体ドラムを感光層側から遮光状態で加熱できる
ようにした装置)で120℃−20分間の熱処理を行な
い、ついで室温に冷却して再び複写機に戻し、更に50
枚(通算5000枚)コピーを行ない、初期(1枚目)
及び5000枚目の表面電位を測定した。Intermediate layer forming liquid: Water 1
50 parts methanol 2
00 parts Charge generation layer forming liquid: Azo pigment listed in Table 5 3 parts Cyclohexanone 200 parts Charge transporting layer forming liquid: Charge transport substance listed in Table 6 8 parts Polyarylate (Unitika faU-100) 1
2 parts methylene chloride 50
Part 1.2-dichloroethane 3
Copy 0 Next, each photoreceptor was set in an electrophotographic copying machine (modified to be negatively charged - Copy FT7050 manufactured by Ricoh), and after 4,950 copies were made, the photoreceptors were taken out of the copying machine and placed in a light-shielding copying machine. Heat treatment is performed at 120°C for 20 minutes using an external heating device (a device that uses a drum-shaped sheet heating element to heat the photoreceptor drum from the photosensitive layer side in a light-shielded state), and then cooled to room temperature and returned to the copying machine. Return, another 50
(total of 5000 copies), initial (1st copy)
And the surface potential of the 5000th sheet was measured.
比較のため各実施例の感光体に熱処理(冷却工程も含む
)を行なわなかった他は同じ方法で断続コピーを行ない
、同様にテストした。。For comparison, the photoreceptors of each example were subjected to intermittent copying in the same manner except that they were not subjected to heat treatment (including the cooling step) and tested in the same manner. .
以上の結果を表−5に示す。The above results are shown in Table-5.
(以下余白)
表−5
表−5(社)
表−5(社)
表−5(転)
実施例211〜252
AQ導電層を有する長尺のポリエステルフィルム支持体
上に下記組成の中間層形成液、電荷発生層形成液及び電
荷輸送層形成液を順次、浸漬塗布、乾燥して夫々0.5
μm厚の中間層、0.3μm厚の電荷発生層及び18μ
m厚の電荷輸送層を形成後、両端部を接合することによ
り有機系電子写真感光体ベルトを作成した。(Margins below) Table-5 Table-5 (company) Table-5 (company) Table-5 (transfer) Examples 211 to 252 Formation of an intermediate layer with the following composition on a long polyester film support having an AQ conductive layer The liquid, the charge generation layer forming liquid and the charge transporting layer forming liquid were sequentially applied by dip coating and dried to a coating of 0.5% each.
μm thick intermediate layer, 0.3 μm thick charge generation layer and 18 μm thick
After forming a charge transport layer with a thickness of m, both ends were joined to produce an organic electrophotographic photoreceptor belt.
中間層形成液:
水 10
0部メタノール 10
0部電荷発生層形成液:
表−6に記載のアゾ顔料 2部シク
ロへキサノン 120部電荷
輸送層形成液:
表−6に記載の電荷輸送物質 8部テト
ラヒドロフラン 80部次に各
感光体を電子写真複写機(■リコー製すコピーFT20
50)にセットし、感光体の表面電位が一670v以下
に低下した時は55℃の熱風(熱源はPTC発熱体)を
感光体表面に20分間吹付けるという条件で3700枚
の連続コピーを行なった。Intermediate layer forming liquid: Water 10
0 parts methanol 10
0 parts Charge generation layer forming liquid: Azo pigment listed in Table 6 2 parts Cyclohexanone 120 parts Charge transporting layer forming liquid: Charge transporting material listed in Table 6 8 parts Tetrahydrofuran 80 parts Next, each photoreceptor was heated with electrons. Photocopy machine (Ricoh Copy FT20
50), and when the surface potential of the photoreceptor decreased to 1,670 V or less, 55°C hot air (heat source was a PTC heating element) was blown onto the surface of the photoreceptor for 20 minutes, and 3,700 sheets were continuously copied. Ta.
比較のため熱風の吹付けを行なわなかった他は同じ方法
で連続コピーを行なった。For comparison, continuous copying was performed using the same method except that hot air was not blown.
得られたコピーの初期(1枚目)及び3700枚目の画
像濃度をマクベス濃度計で測定した。The initial (first) and 3700th image densities of the resulting copies were measured using a Macbeth densitometer.
以上の結果を表−6に示す。The above results are shown in Table-6.
表−6
表−6(社)
表−6(社)
実施例253〜294
外径80mm、長さ340+nmの11ドラム(ヒート
パイブ内蔵)に下記組成の電荷輸送層形成液、電荷発生
層形成液、中間層形成液及び保護層形成液を順次、浸漬
塗布、乾燥して夫々20μm厚の電荷輸送層、0.2μ
m厚の電荷発生層、0.2μm厚の中間層及び4μm厚
の保護層を形成することにより有機系電子写真感光体を
作成した。Table-6 Table-6 (Company) Table-6 (Company) Examples 253 to 294 11 drums (with built-in heat pipe) having an outer diameter of 80 mm and a length of 340+ nm were charged with a charge transport layer forming liquid, a charge generating layer forming liquid, and a charge transport layer forming liquid having the following compositions. The intermediate layer forming liquid and the protective layer forming liquid were sequentially applied by dip coating and dried to form a charge transport layer with a thickness of 20 μm and a charge transport layer of 0.2 μm.
An organic electrophotographic photoreceptor was prepared by forming a charge generation layer with a thickness of m, an intermediate layer with a thickness of 0.2 μm, and a protective layer with a thickness of 4 μm.
電荷輸送層形成液:
表−7に記載の電荷輸送物質 9部塩化
メチレン 80部電荷発
生層形成液:
表−7に記載のアゾ顔料 3部シク
ロへキサノン 150部2−
ブタノン 100部中間
層形成液:
イソプロパノール 30部保
護層形成液:
酸化錫 80部ト
ルエン 170部2
−ブタノン 100部次
に各感光体を電子写真複写機(■リコー製すコピーFT
5510)にセットし、ヒートパイプにより感光体ドラ
ムを38±3℃に加熱しながら5500枚の連続コピー
を行ない、初期(1枚目)及び5500枚目の表面電位
を測定した。Charge transport layer forming liquid: Charge transport substance listed in Table 7 9 parts Methylene chloride 80 parts Charge generation layer forming liquid: Azo pigment listed in Table 7 3 parts Cyclohexanone 150 parts 2-
Butanone 100 parts Intermediate layer forming liquid: Isopropanol 30 parts Protective layer forming liquid: Tin oxide 80 parts Toluene 170 parts2
-100 copies of butanone Next, transfer each photoreceptor to an electrophotographic copying machine (Copy FT manufactured by Ricoh
5510), and while heating the photosensitive drum to 38±3° C. with a heat pipe, 5500 sheets were continuously copied, and the initial (first sheet) and 5500th sheet surface potentials were measured.
比較のため各実施例の感光体を加熱しなかった他は同じ
方法で連続コピーを行ない、同様にテストした。For comparison, continuous copying was carried out in the same manner except that the photoreceptors of each example were not heated, and the same tests were conducted.
以上の結果を表−7に示す。The above results are shown in Table-7.
(以下余白)
表−7
表−7(続)
表−7(続)
効−−−長
本発明方法によれば繰返し使用により帯電性、電荷保持
性等の特性が劣化した、即ち疲労した特定の有機系感光
体を熱処理することにより疲労を回復して耐久性を向上
すると共に、環境依存性を改善して常時、高品質の画像
を形成することができる。(Leaving space below) Table 7 Table 7 (Continued) Table 7 (Continued) Efficacy - Length According to the method of the present invention, characteristics such as chargeability and charge retention have deteriorated due to repeated use, that is, fatigue has occurred. By heat-treating the organic photoreceptor, fatigue can be recovered and durability improved, and environmental dependence can be improved to constantly form high-quality images.
第1〜4図は夫々本発明方法で使用される有機系電子写
真感光体の一例の断面図である。
11・・・導電性支持体 13・・・中間層14
・・・感光層 15・・・保護層21・・
・電荷発生層 22・・・電荷輸送層特許出願
人 株式会社 リ コ −1 to 4 are cross-sectional views of examples of organic electrophotographic photoreceptors used in the method of the present invention. 11... Conductive support 13... Intermediate layer 14
...Photosensitive layer 15...Protective layer 21...
・Charge generation layer 22...Charge transport layer Patent applicant Rico Co., Ltd. -
Claims (1)
I )〜(III)で示されるアゾ顔料の少くとも1種と、
電荷輸送物質とを主成分とする感光層を設けてなり、少
くとも帯電及び露光の工程を繰返すことにより疲労した
有機系電子写真感光体を加熱処理することを特徴とする
電子写真感光体の疲労回復方法。 ▲数式、化学式、表等があります▼・・・・・・( I
) ▲数式、化学式、表等があります▼・・・・・・(II) ▲数式、化学式、表等があります▼・・・・・・(III
) (式中Cpはカップラー残基を表わす。)[Claims] 1. The following general formula (
At least one type of azo pigment represented by I) to (III),
Fatigue of an electrophotographic photoreceptor, characterized in that the organic electrophotographic photoreceptor is provided with a photosensitive layer containing a charge transporting substance as a main component, and is fatigued by at least repeated charging and exposure steps. Recovery method. ▲There are mathematical formulas, chemical formulas, tables, etc.▼・・・・・・( I
) ▲There are mathematical formulas, chemical formulas, tables, etc.▼・・・・・・(II) ▲There are mathematical formulas, chemical formulas, tables, etc.▼・・・・・・(III
) (In the formula, Cp represents a coupler residue.)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14531788A JPH01312576A (en) | 1988-06-13 | 1988-06-13 | Method of restoring electrophotographic sesitive body from fatigue |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14531788A JPH01312576A (en) | 1988-06-13 | 1988-06-13 | Method of restoring electrophotographic sesitive body from fatigue |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01312576A true JPH01312576A (en) | 1989-12-18 |
Family
ID=15382365
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14531788A Pending JPH01312576A (en) | 1988-06-13 | 1988-06-13 | Method of restoring electrophotographic sesitive body from fatigue |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01312576A (en) |
-
1988
- 1988-06-13 JP JP14531788A patent/JPH01312576A/en active Pending
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