JPH0422967A - Electrophotographic sensitive body - Google Patents
Electrophotographic sensitive bodyInfo
- Publication number
- JPH0422967A JPH0422967A JP12867590A JP12867590A JPH0422967A JP H0422967 A JPH0422967 A JP H0422967A JP 12867590 A JP12867590 A JP 12867590A JP 12867590 A JP12867590 A JP 12867590A JP H0422967 A JPH0422967 A JP H0422967A
- Authority
- JP
- Japan
- Prior art keywords
- photoreceptor
- layer
- light
- overcoat layer
- resin
- 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
- 239000000758 substrate Substances 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 3
- 108091008695 photoreceptors Proteins 0.000 claims description 55
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 abstract description 8
- 229920005989 resin Polymers 0.000 abstract description 6
- 239000011347 resin Substances 0.000 abstract description 6
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 abstract description 5
- 229910001887 tin oxide Inorganic materials 0.000 abstract description 5
- 229920003229 poly(methyl methacrylate) Polymers 0.000 abstract description 3
- 229920001187 thermosetting polymer Polymers 0.000 abstract description 3
- 238000012546 transfer Methods 0.000 abstract description 3
- -1 polymethylsiloxane Polymers 0.000 abstract description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 abstract description 2
- 238000010030 laminating Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 34
- 239000000463 material Substances 0.000 description 14
- 238000002834 transmittance Methods 0.000 description 9
- 239000000049 pigment Substances 0.000 description 8
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 6
- 239000000975 dye Substances 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- 238000010791 quenching Methods 0.000 description 5
- 230000000171 quenching effect Effects 0.000 description 5
- 230000003595 spectral effect Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000000370 acceptor Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 150000007857 hydrazones Chemical class 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- ZYECOAILUNWEAL-NUDFZHEQSA-N (4z)-4-[[2-methoxy-5-(phenylcarbamoyl)phenyl]hydrazinylidene]-n-(3-nitrophenyl)-3-oxonaphthalene-2-carboxamide Chemical compound COC1=CC=C(C(=O)NC=2C=CC=CC=2)C=C1N\N=C(C1=CC=CC=C1C=1)/C(=O)C=1C(=O)NC1=CC=CC([N+]([O-])=O)=C1 ZYECOAILUNWEAL-NUDFZHEQSA-N 0.000 description 1
- IYHIFXGFKVJNBB-UHFFFAOYSA-N 5-chloro-2-[(2-hydroxynaphthalen-1-yl)diazenyl]-4-methylbenzenesulfonic acid Chemical compound C1=C(Cl)C(C)=CC(N=NC=2C3=CC=CC=C3C=CC=2O)=C1S(O)(=O)=O IYHIFXGFKVJNBB-UHFFFAOYSA-N 0.000 description 1
- 241000408495 Iton Species 0.000 description 1
- DXUUXWKFVDVHIK-UHFFFAOYSA-N ambenonium chloride Chemical group [Cl-].[Cl-].C=1C=CC=C(Cl)C=1C[N+](CC)(CC)CCNC(=O)C(=O)NCC[N+](CC)(CC)CC1=CC=CC=C1Cl DXUUXWKFVDVHIK-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 235000012730 carminic acid Nutrition 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- LEYJJTBJCFGAQN-UHFFFAOYSA-N chembl1985378 Chemical compound OC1=CC=C2C=CC=CC2=C1N=NC(C=C1)=CC=C1N=NC1=CC=C(S(O)(=O)=O)C=C1 LEYJJTBJCFGAQN-UHFFFAOYSA-N 0.000 description 1
- ZLFVRXUOSPRRKQ-UHFFFAOYSA-N chembl2138372 Chemical compound [O-][N+](=O)C1=CC(C)=CC=C1N=NC1=C(O)C=CC2=CC=CC=C12 ZLFVRXUOSPRRKQ-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002391 heterocyclic compounds Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- GVKCHTBDSMQENH-UHFFFAOYSA-L phloxine B Chemical compound [Na+].[Na+].[O-]C(=O)C1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1C1=C2C=C(Br)C(=O)C(Br)=C2OC2=C(Br)C([O-])=C(Br)C=C21 GVKCHTBDSMQENH-UHFFFAOYSA-L 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- DNXIASIHZYFFRO-UHFFFAOYSA-N pyrazoline Chemical compound C1CN=NC1 DNXIASIHZYFFRO-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 125000005259 triarylamine group Chemical group 0.000 description 1
- AAAQKTZKLRYKHR-UHFFFAOYSA-N triphenylmethane Chemical compound C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 AAAQKTZKLRYKHR-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Photoreceptors In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電子写真感光体に関し、詳しくは、導電性基体
上に電荷輸送層、電荷発生層及び特定のオーバーコート
層をこの順に設けたプラス帯電で用いられる積層型電子
写真感光体に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electrophotographic photoreceptor, and more particularly, it relates to an electrophotographic photoreceptor in which a charge transport layer, a charge generation layer, and a specific overcoat layer are provided in this order on a conductive substrate. This invention relates to a laminated electrophotographic photoreceptor used for charging.
プリンタは各種が知られており、殊に、事務用としては
レーザプリンタの生産・使用が急速な伸びを示している
。これは高速で高解像の印字が可能であり、しかも殆ん
ど騒音を出さないこと等に起因しているためと考えられ
る。Various types of printers are known, and in particular, the production and use of laser printers for office use is rapidly increasing. This is thought to be due to the fact that high-speed, high-resolution printing is possible, and almost no noise is emitted.
ところで、レーザプリンタの技術的ポイントとなるのは
、静電荷像を形成する感光体ドラムであるとされている
。現在量も広く注目されている感光体ドラムは、機能分
離型有機感光体（積層型電子写真感光体）である。第５
図は従来がらの機能分離型有機感光体の代表的なものの
概略を示している。By the way, the technical point of a laser printer is said to be the photosensitive drum that forms an electrostatic image. Photoreceptor drums that are currently attracting widespread attention are functionally separated organic photoreceptors (laminated electrophotographic photoreceptors). Fifth
The figure schematically shows a typical conventional functionally separated organic photoreceptor.
この種の機能分離型有機感光体（以降単に「感光体」又
は「有機感光体」と略記することがある）は−般に負帯
電型であり、導電性基体／電荷発生層（ＣＧＬ）／電荷
輸送層（（１：ＴＬ）という層構成が採用されている。This type of functionally separated organic photoreceptor (hereinafter sometimes simply referred to as "photoreceptor" or "organic photoreceptor") is generally negatively charged, and has a conductive substrate/charge generation layer (CGL)/ A layer structure called a charge transport layer ((1:TL) is adopted.
この感光体に負帯電がなされると、感光体１′の表面（
即ちＣＴＬ１２の表面）にはマイナスの電荷が存在し、
導電性基体１１とＣＧＬ１３との界面にはプラスの電荷
が誘起される。この負帯電した感光体１′にレーザ光が
照射されると、レーザ光はＣＴＬ１２を透過してＣＧＬ
１３で吸収され正孔と電子とからなる一対のキャリアを
発生し、正孔はＣＴＬ１２に注入され移動して感光体１
′表面の負電荷を中和する。When this photoreceptor is negatively charged, the surface of the photoreceptor 1' (
In other words, there is a negative charge on the surface of CTL 12,
A positive charge is induced at the interface between the conductive substrate 11 and the CGL 13. When this negatively charged photoreceptor 1' is irradiated with a laser beam, the laser beam passes through the CTL 12 and reaches the CGL.
The holes are absorbed by the CTL 13 and generate a pair of carriers consisting of holes and electrons, and the holes are injected into the CTL 12 and move to the photosensitive member 1.
'Neutralizes negative charges on the surface.
方、電子は前記の導電性基体１１とＣＧＬ１３との界面
に存在している正電荷を中和する。このようにして潜像
が感光体１′上に形成される。On the other hand, the electrons neutralize the positive charges existing at the interface between the conductive substrate 11 and the CGL 13. In this way, a latent image is formed on the photoreceptor 1'.
従来のこうした感光体１′は（１）長波長側の高感度の
ものが容易に得られる、（２）電荷発生層（ＣＧＬ）１
３を保護するように電荷輸送層（ＣＴＬ）１２が感光体
表面層を形成しているので機械的に丈夫である等の利点
がある。だが、その反面、これまでの感光体１′に負帯
電のための負コロナ放電が行なわれると、その際、オゾ
ンが発生し、そのオゾンが環境上問題となっている。も
っとも、オゾンの発生を押えるには感光体１′に正コロ
ナ帯電を施せばよいのであるが、そのためには、 ＣＴ
Ｌにおける電荷輸送物質（ＣＴＭ）をドナーからアクセ
プター（電子の移動度の大きい材料）に変更する必要が
ある。しかし、アクセプターとして実用性のある材料は
少ないのが現状である。Such a conventional photoreceptor 1' has (1) a high sensitivity on the long wavelength side that can be easily obtained, and (2) a charge generation layer (CGL) 1.
Since the charge transport layer (CTL) 12 forms the surface layer of the photoreceptor so as to protect the photoreceptor 3, it has advantages such as being mechanically strong. However, on the other hand, when conventional negative corona discharge is performed to negatively charge the photoreceptor 1', ozone is generated and this ozone poses an environmental problem. However, in order to suppress the generation of ozone, it is sufficient to apply positive corona charging to the photoreceptor 1', but for this purpose, CT
It is necessary to change the charge transport material (CTM) in L from a donor to an acceptor (a material with high electron mobility). However, there are currently few materials that are practical as acceptors.
かかる背景のもとに、従来の負帯電型感光体（電荷輸送
層／電荷発生層／導電性基体）のそれぞれの材料を変え
ることなく、電荷輸送層と電荷発生層との位置を逆にし
て正帯電型感光体（電荷発生層／電荷輸送層／導電性基
体）とする検討がなされているが、その場合には、感光
体表面を形成する電荷発生層はその厚さが薄いうえ機械
的耐久性に劣るといった不都合をもっている。ａ−５ｉ
Ｈを電荷発生材料とした電荷発生層／電荷輸送層／導電
性基体からなる正帯電型感光体（特開昭５７−１６．）
８０号公報に記載）の使用によれば前記のように不都合
は解消されるが、感光体材料の選択の幅に制限を生しさ
せる傾向がある。Based on this background, the positions of the charge transport layer and charge generation layer were reversed without changing the respective materials of the conventional negatively charged photoreceptor (charge transport layer/charge generation layer/conductive substrate). Studies have been conducted to create a positively charged photoreceptor (charge generation layer/charge transport layer/conductive substrate), but in that case, the charge generation layer that forms the surface of the photoreceptor is thin and has mechanical problems. It has the disadvantage of being inferior in durability. a-5i
Positive charging type photoreceptor consisting of a charge generation layer/charge transport layer/conductive substrate using H as a charge generation material (Japanese Patent Application Laid-Open No. 57-16)
Although the above-mentioned disadvantages can be solved by using the method described in Japanese Patent Application No. 80, there is a tendency that the range of selection of photoreceptor materials is restricted.
もつとも、オーバーコートＮ （ＯＣＬ）／ＣＧＬ／Ｃ
ＴＬ／導電性基体からなる構成の感光体を正帯電型とし
て使用することも検討されている。この感光体によれば
、見掛けの耐オゾン性、耐摩耗性が改良され、環境汚染
対策にも有効である。その反面、この種の感光体は光疲
労が新たな問題として生じている。Motomo, Overcoat N (OCL)/CGL/C
It is also being considered to use a photoreceptor composed of TL/conductive substrate as a positively charged type. This photoreceptor has improved apparent ozone resistance and abrasion resistance, and is also effective in countering environmental pollution. On the other hand, this type of photoreceptor has caused a new problem of optical fatigue.
即ち、この感光体が蛍光ランプの光を長時間うけると、
帯電位が低下し、レーザ露光後の残留電位が上昇すると
いう不都合がある。ただし、特公昭６４−８３３１号公
報に記載されているように、クエンチング光としてＣＴ
Ｌに吸収のある波長の光を除去した光（ＣＧＬＩμｓ以
下の薄膜であるため、照射光の大半はＣＧＬを透過して
ＣＴＬに達する）を用いれば−即ち蛍光ランプを赤色Ｌ
ＥＤに変更すればｍ：の光疲労は大巾に改良されること
は確認されている。In other words, if this photoreceptor is exposed to fluorescent lamp light for a long time,
There is a disadvantage that the charge potential decreases and the residual potential after laser exposure increases. However, as described in Japanese Patent Publication No. 64-8331, CT is used as quenching light.
If we use light from which wavelengths that are absorbed by L have been removed (because the film is thinner than CGLIμs, most of the irradiated light passes through CGL and reaches CTL), we can convert fluorescent lamps into red L.
It has been confirmed that the light fatigue of m: can be greatly improved by changing to ED.
しかし、この感光体が室内光（蛍光ランプ光）下におか
れた場合には、この光疲労の問題を避けることができな
い。However, when this photoreceptor is placed under room light (fluorescent lamp light), the problem of light fatigue cannot be avoided.
本発明の目的は、光疲労の極めて少ないオーバーコート
層／電荷発生層／電荷輸送層／導電性基体からなる正帯
電型感光体を提供するものである６本発明の他の目的は
、従来からの材料が採用しうる積層型電子写真感光体を
提供するものである。An object of the present invention is to provide a positively charged photoreceptor consisting of an overcoat layer/charge generation layer/charge transport layer/conductive substrate that exhibits extremely little optical fatigue. The object of the present invention is to provide a laminated electrophotographic photoreceptor in which the following materials can be used.
本発明は赤外光乃至は近赤外光のＬＥＤＡ又はＬＤプリ
ンタ等に使用される電子写真感光体において、オーバー
コート層／電荷発生層／電荷輸送層／導電性基体の層構
成からなり、かつ、前記オーバーコート層は赤外光より
短がい波長の光の透過を実質的に遮蔽する性質を有する
ことを特徴としている。The present invention provides an electrophotographic photoreceptor for use in infrared or near-infrared light LEDA or LD printers, which has a layer structure of overcoat layer/charge generation layer/charge transport layer/conductive substrate, and The overcoat layer is characterized in that it has a property of substantially blocking the transmission of light having a wavelength shorter than infrared light.
以下に本発明を添付の図面に従がいながらさらに詳細に
説明する。The invention will be explained in more detail below with reference to the accompanying drawings.
本発明に係る正帯電に適した積層型感光体は。A laminated photoreceptor suitable for positive charging according to the present invention is as follows.
従来技術として説明したところの比較から容易に推察さ
れるように、保護層として特定のオーバーコート（ＯＣ
Ｌ）を形成したことに最大の意義を有している。As can be easily inferred from the comparison of the prior art, a specific overcoat (OC) is used as a protective layer.
The greatest significance lies in the formation of L).
第１図は本発明に係る正帯電型積層感光体１の層構成の
一例を表わしたものであり、そこに付された引出し線番
号は第５図と一致させである。図中、１４はＯＣＬを表
わしている。導電性支持体１１とＣＴＬとの間には、必
要に応じて、下引き層を設けることができる。FIG. 1 shows an example of the layer structure of a positively charged laminated photoreceptor 1 according to the present invention, and the lead line numbers assigned thereto are the same as those in FIG. 5. In the figure, 14 represents OCL. An undercoat layer can be provided between the conductive support 11 and the CTL, if necessary.
導電性支持体としてはＡＱ、 Ｐｔなどの金属板、金属
酸化物の板をはじめとして、これら金属或いは金属酸化
物を蒸着乃至はスパッタリングしたプラスチックシート
紙又は布などが素材として使用される。また、導電処理
を施した紙やプラスチックシートなども使用可能である
。Materials used as the conductive support include metal plates such as AQ and Pt, metal oxide plates, and plastic sheet paper or cloth on which these metals or metal oxides are deposited or sputtered. Further, conductive treated paper or plastic sheets can also be used.
ＣＧＬ１３及びＣＴＬ１２に関しては、従来から用いら
れている材料がそのまま適用しうる。即ち、長波長に感
度のある電荷発生材料（ＣＧＭ）としては、フタロシア
ニン顔料、トリスアゾ顔料、アズレニウム塩、スクェア
リウムなどが例示でき、また、電荷輸送材料（ＣＴＭ）
としては、オキサジル、ピラゾリンなどの複素環化合物
、ヒドラゾン、トリフェニルメタン、トリアリールアミ
ンなどが例示できる。Regarding the CGL 13 and CTL 12, conventionally used materials can be used as they are. That is, examples of charge generating materials (CGM) sensitive to long wavelengths include phthalocyanine pigments, trisazo pigments, azulenium salts, and squareium, and charge transport materials (CTM).
Examples include heterocyclic compounds such as oxazyl and pyrazoline, hydrazone, triphenylmethane, and triarylamine.
そして、これら材料のみによって、又は、多くの場合は
適当な結着剤に分散させた状態でＣＧＬ１３及びＣＴＬ
１２が形成される。CGL13 and CTL can be prepared by these materials alone or, in many cases, dispersed in a suitable binder.
12 is formed.
表面層を形成する０ＣＬ１４は繰り返し述べたように、
本発明に係る正帯電型感光体において最も重要視される
べきものである。即ち、０ＣＬ１４は機械的強度にすぐ
れ摩耗量の少ないものがよい。しかし、その膜厚が大き
くなって電気抵抗が高くなると帯電性は増すが、露光後
の残留電位が高くなって好ましくない。本発明者の多く
の検討によれば、オーバーコート層形成材料としては酸
化スズを熱硬化性ウレタン樹脂、ポリメチルシロキサン
樹脂又はメチルメタクリレート樹脂などに分散したもの
で膜厚１〜５趨に形成したものが好結果をもたらすこと
が判明した。As mentioned repeatedly, OCL14 forming the surface layer is
This is the most important aspect of the positively charged photoreceptor according to the present invention. In other words, OCL14 should have excellent mechanical strength and a small amount of wear. However, if the film thickness increases and the electrical resistance increases, the charging property increases, but the residual potential after exposure increases, which is not preferable. According to many studies by the present inventors, the overcoat layer forming material is a material in which tin oxide is dispersed in a thermosetting urethane resin, polymethylsiloxane resin, methyl methacrylate resin, etc., and is formed to a film thickness of 1 to 5. It turns out that things give good results.
ただし、単にこうしたオーバーコート層１４が表面層と
して形成されているだけでは感光体の光疲労を解決する
ことはできない。However, simply forming such an overcoat layer 14 as a surface layer cannot solve optical fatigue of the photoreceptor.
そこで今、改めて第１図に示した本発明に係る感光体１
を第２図に示したＬＤプリンターで使用する場合につい
て考えると、その作像プロセスは、のようになる。そし
て、このプロセスにおいては、敢えて断わるまでもなく
、クエンチング（８）の操作で感光体１の光疲労は極力
さけられねばならない。Therefore, once again, the photoreceptor 1 according to the present invention shown in FIG.
When using the LD printer shown in FIG. 2, the image forming process is as follows. In this process, it goes without saying that optical fatigue of the photoreceptor 1 must be avoided as much as possible by the quenching (8) operation.
第３図は、（ａ）室内光として一般的な蛍光ランプ、（
ｂ）プリンタで使用される赤色発光ダイオード（ＬＥＤ
）、及び、（ｃ）半導体レーザの発光分布を示している
。この発光分布から理解されるように、赤色光ＬＥＤプ
リンタ用感光感光体近赤外光ＬＤプリンター用悪感光体
６００ｎｍ以上の波長の光のみ感度があれがよいから、
クエンチングランプ８としての蛍光ランプ下にこの感光
体１が置かれた場合には６００１１１１以下の光がＣＧ
Ｌ１３、（：ＴＬＩ２に入射さ九ないようにすれば光疲
労を低減できるはずである。Figure 3 shows (a) a common fluorescent lamp used as indoor light;
b) Red light emitting diode (LED) used in printers
) and (c) show the emission distribution of the semiconductor laser. As can be understood from this luminescence distribution, the photoreceptor for red light LED printers, the photoreceptor for near-infrared light LD printers, has good sensitivity only to light with wavelengths of 600 nm or more.
When this photoreceptor 1 is placed under a fluorescent lamp as a quenching lamp 8, light of 6001111 or less is CG.
L13, (: It should be possible to reduce optical fatigue by preventing light from entering the TLI2.
そこで、ＯＣＬ １４を構成している染料又は顔料を適
当に溶剤を用いて樹脂中に酸化スズとともに分散し、こ
れをガラス基板上に２〜５ｐｓ厚に塗工したものの分光
透過率を測定したところ、染料及び顔料の種類によって
多少の差は認められたものの、第４図に示したような傾
向が認められた。なお、ここで用いられた染料、顔料は
下記のごときものである。Therefore, we dispersed the dye or pigment that makes up OCL 14 in a resin together with tin oxide using an appropriate solvent, and measured the spectral transmittance of this coated on a glass substrate to a thickness of 2 to 5 ps. Although some differences were observed depending on the type of dye and pigment, the trends shown in Figure 4 were observed. The dyes and pigments used here are as follows.
來Ｊしυ匹
（１） Ｄｉａｃｅｌｌｉｔｏｎ Ｆａｓｔ Ｒｕｂｉ
ｎｇ ３Ｂ Ｍ／Ｄ（三菱化成社ｍ１）
Ｋａｙａｌｏｎ
Ｆａｓｔ
Ｒｕｂｉｎｇ
Ｂ（日本化薬社製）
Ｄｉａｃｅｌｌｉｔｏｎ
Ｆａｓｔ
ｉｎｋ
Ｍ／Ｄ （三菱化成社製）
（４） Ｍｉｋｅｔｏｎ Ｆａｓｔ Ｒｅｄ Ｒ（三井
化学社製）（５） Ｄｉａｃｅｌｌｉｔｏｎ Ｒｅｄ
２８ Ｍ／Ｄ（三菱化成社製）（６） Ｄｉａｃｅｌｌ
ｉｔｏｎ Ｆａｓｔ ５ｃａｒｌｅｔ Ｎ Ｍ／Ｄ（三
菱化成社製）
（７） Ｍｊ、ｋｅｔｏｎ Ｆａｓｔ Ｒｅｄ Ｖｉｏ
ｌｅｔ Ｒ（三井化学社製）１乳夙叢
Ｂｒ１ｌｌｉａｎｔ Ｃａｒｍｉｎｅ ６ＢＰｅｒｍａ
ｎｅｎｔ Ｒｅｄ Ｆ５Ｒ
Ｌａｋｅ Ｒｅｄ Ｃ
第４図の分光透過率を示したグラフから判るとおり、大
まかにいえば、本発明に係るＬＥＤＡ又はＬＤ用感光体
が蛍光ランプ光の照射を受けると、・工・電荷輸送層１
２に吸収のある４００ｎｍ以下の光はＣＧＬｌ３及び０
ＣＬ１４でかツトされ、また塁、・ＣＧＬｌ、３に吸収
のある光のうち６００ｎｍ以トの光（蛍光ランプの電光
エネルギーの犬、ｆ＝）は０ＣＩ−１４でカットされる
ため、感光体の光疲労が大幅に改良される。Diacelliton Fast Rubi (1)
ng 3B M/D (Mitsubishi Kasei m1) Kayalon Fast Rubing B (Nippon Kayaku Co., Ltd.) Diacelliton Fast ink M/D (Mitsubishi Kasei Co., Ltd.) (4) Miketon Fast Red R (Mitsui Chemical Co., Ltd.) (5) Diacelliton Red
28 M/D (manufactured by Mitsubishi Chemical Corporation) (6) Diacell
iton Fast 5carlet N M/D (manufactured by Mitsubishi Kasei Corporation) (7) Mj, keton Fast Red Vio
let R (manufactured by Mitsui Chemicals) 1lliant Carmine 6BPerma
nent Red F5R Lake Red C As can be seen from the graph showing the spectral transmittance in Figure 4, roughly speaking, when the LEDA or LD photoreceptor according to the present invention is irradiated with fluorescent lamp light, transport layer 1
Light below 400 nm that is absorbed by CGLl3 and 0
Of the light produced by CL14 and absorbed by bases, CGLl, and 3, light of 600 nm or shorter (f = the dog of the lightning energy of a fluorescent lamp) is cut by 0CI-14, so the photoreceptor Light fatigue is significantly improved.
なお、ＯＣＬの分光透過率をその許容範囲をもって示せ
ば
５００ｎｍの波長の光で透過率が３０％以下５５０ｎｍ
の波長の光で透過率が５０％以下６５０ｎｍの波長の光
で透過率が７咋以上７００ｎｎ＋の波長の光で透過率が
８０％以上である。これら透過率は染顔料の種類・量、
酸化スズの量及び樹脂の種類・量などによって制御する
ことができる。In addition, if the spectral transmittance of OCL is shown with its tolerance range, the transmittance for light with a wavelength of 500 nm is 30% or less at 550 nm.
The transmittance for light with a wavelength of 50% or less is 7 mm or more and the transmittance is 80% or more for light with a wavelength of 650 nm or more. These transmittances are determined by the type and amount of dye and pigment,
It can be controlled by the amount of tin oxide and the type and amount of resin.
〔実施例〕
実施例１
ＣＴＬとして、ヒドラゾン（０丁Ｍ）１重量部とポリカ
ーボネート樹脂１重量部とをテトラヒドロフラン中に分
散したものをアルミドラム上にディッピング法で塗布し
、乾燥して約２５１厚のＣＴＬを形成した。次に、ＣＧ
Ｌとしてトリスアゾ顔料３重量部とポリビニルブチラー
ル樹脂１重量部とをテトラヒドロフラン中に分散し塗工
液をつくり、これをＣＴｌ−を形成したアルミドラムに
ディッピング法で塗布し、乾燥して約０．５．厚のＣＧ
Ｌを形成した。次にＯＣＬとして、前記塗料（１）１重
量部と、メチルメタクリレート樹脂１重量部と、酸化ス
ズ及び熱硬化剤の適量とをテトラヒドロフラン中の分散
して塗工液をつくり、これをＣＧＬの上にディッピング
法により膜厚約３−のＯＣＬを形成した（熱処理１２０
℃、３０分）。[Example] Example 1 As a CTL, 1 part by weight of hydrazone (0 pack M) and 1 part by weight of polycarbonate resin dispersed in tetrahydrofuran was applied onto an aluminum drum by a dipping method, and dried to a thickness of about 251 mm. CTLs were formed. Next, C.G.
As L, 3 parts by weight of trisazo pigment and 1 part by weight of polyvinyl butyral resin are dispersed in tetrahydrofuran to prepare a coating solution, which is applied to an aluminum drum formed with CTl- by dipping method and dried to give a coating solution of about 0.5 ．． thick CG
L was formed. Next, as OCL, 1 part by weight of the paint (1), 1 part by weight of methyl methacrylate resin, appropriate amounts of tin oxide and a thermosetting agent are dispersed in tetrahydrofuran to prepare a coating liquid, and this is applied to the CGL. An OCL with a film thickness of about 3 mm was formed by a dipping method (heat treatment 120 mm).
℃, 30 minutes).
このようにして作成した感光体ドラム（第１図）を第２
図に示したＬＤプリンターに装置し、この感光体ドラム
における画素テスト及び表面電位■。The photoreceptor drum (Fig. 1) created in this way was
A pixel test and surface potential (1) on this photoreceptor drum installed in the LD printer shown in the figure.
（暗電位）、ＶＬ（明電位−レーザ露光後電位）を測定
した。その結果、Ｖｏ＝８００ボルト、ＶＬ＝１２０ボ
ルトと限定され、現像バイアス６００Ｖ （反転現像）
で良好な画像が得られた。(dark potential) and VL (bright potential - potential after laser exposure) were measured. As a result, Vo = 800 volts, VL = 120 volts, and the developing bias is 600 V (reversal development).
A good image was obtained.
続いて、下記のような各条件下で評価テストを行なった
。Subsequently, evaluation tests were conducted under the following conditions.
（１）評価すべき感光体ドラム
実施例１と比較するため、実施例１のＯＣＬから前記染
料（１）を除去した以外は同様にして比較の感光体を作
成し、これを比較例とする。(1) Photoreceptor drum to be evaluated In order to compare with Example 1, a comparative photoreceptor was prepared in the same manner except that the dye (1) was removed from the OCL of Example 1, and this was used as a comparative example. .
（２） ＬＤプリンターでクエンチングランプ（ＱＬ）
が蛍光ランプの場合と、 ＬＥＤＡ（６６０ｒ＋＋ｗ）
の場合。(2) Quenching lamp (QL) with LD printer
is a fluorescent lamp, and LEDA (660r++w)
in the case of.
（３）前露光なしの場合
スタート１枚目、連続５０００枚目の■。及びｖＬを測
定。(3) In the case of no pre-exposure: 1st sheet, 5000th continuous sheet ■. and measure vL.
（４）前露光（５００１ｕｘ Ｘ ３０分）ありの場合
２分後、６０分後（回復時間）、２介接スタート１００
０枚目。(4) With pre-exposure (5001ux x 30 minutes) 2 minutes later, 60 minutes later (recovery time), 2 interventions start 100
0th piece.
■、前露光なしの場合
２、前露光ありの場合
蛍光ランプ（透光色）５００１ｕｘ Ｘ ３０分ＬＤプ
リンターのＱＬはＬＥＤＡの場合のみ前露光のない場合
、ＬＤプリンターのＱＬが赤色ＬＥＤＡのときはほとん
ど差はないが、ＱＬが蛍光ランプの場合は５０００枚後
の九上昇が、比較例で大きく。■, Without pre-exposure 2, With pre-exposure Fluorescent lamp (transparent color) 5001ux There is almost no difference, but QL increases by 9 after 5,000 sheets in the case of fluorescent lamps, which is large in comparison examples.
それに比して実施例１では低く抑えられている。In comparison, it is kept low in Example 1.
一方、感光体ドラムが室内光下↓こ放置された場合と想
定して（５００１ｕｘで３０分間）前露光を与えた場合
は、比較例でｖ０低下が大きく（画像で地汚れ発生）、
６０分間の暗所放置では十分回復しない。また、１００
０枚コピー後でＶ、が上昇する。ところが、実施例１で
はｖｏと九とも問題ない程度に制御されており、 ＯＣ
Ｌのフィルター効果が顕著に現われている。On the other hand, when pre-exposure was applied (30 minutes at 5001 ux) assuming that the photoreceptor drum was left under indoor light, the v0 drop was large in the comparative example (background staining occurred in the image);
Leaving it in the dark for 60 minutes will not fully recover. Also, 100
After copying 0 sheets, V increases. However, in Example 1, both vo and 9 were controlled to an acceptable level, and OC
The filter effect of L is clearly visible.
実施例２
染料又は顔料の種類及び樹脂、溶剤とそれらの混合比を
変えて、ガラス板上に数１０種類のＯＣＬを形成し、そ
の分光透過率を測定し、第４図に近いもので膜の機械的
強度、電気抵抗値から８種類のＯＣＬを選定し、実施例
１と同様の方法で感光体ドラムを作成した。その評価テ
ストの結果は、光疲労に関して実施例１とほぼ同様の効
果が確認された。Example 2 Several dozen types of OCL were formed on a glass plate by changing the type of dye or pigment and the mixing ratio of resin and solvent, and the spectral transmittance was measured. Eight types of OCL were selected based on their mechanical strength and electrical resistance values, and photoreceptor drums were fabricated in the same manner as in Example 1. As a result of the evaluation test, almost the same effect as in Example 1 was confirmed regarding optical fatigue.
なお、本発明のＬＤ感光体は、正帯電で使用され、表面
に特定のオーバーコート層を有するため、耐オゾン性、
耐光耗性も改良され、また、オゾン濃度の低減にも役立
っている。Note that the LD photoreceptor of the present invention is used with positive charging and has a specific overcoat layer on the surface, so it has ozone resistance,
It also improves light abrasion resistance and helps reduce ozone concentrations.
第１図は本発明に係る電子写真感光体の概略図である。
第２図は感光体ドラムを用いたレーザープリンタの概略
図である。
第３図は波長とエネルギー比との関係を表わしたグラフ
である。
第４図は電荷発生層（ＣＧＬ）、電荷輸送層（ＣＴＬ）
及びオーバーコート層（ＯＣＬ）のそれぞれの波長と透
過率との関係を表わしたグラフである。
第５図は従来の負帯電型ＣＴＬ／ＣＧＬ／導電性基体の
構成からなる感光体を用いて潜像が形成されることの説
明図である。
１・・・電子写真感光体
（１１・・・導電性基体、１２・・ＣＴＬ、１３− Ｃ
ＧＩｌ、１４・・・０ＣＬ）
２・・・帯電チャージャー
３・・レーザ露光
４・・・現像部
５・・・転写チャージャー
６・・・定着ローラ
７・・クリーニング部
８・
クエンチングランプ
９・・・被転写体FIG. 1 is a schematic diagram of an electrophotographic photoreceptor according to the present invention. FIG. 2 is a schematic diagram of a laser printer using a photosensitive drum. FIG. 3 is a graph showing the relationship between wavelength and energy ratio. Figure 4 shows the charge generation layer (CGL) and charge transport layer (CTL).
It is a graph showing the relationship between each wavelength and transmittance of an overcoat layer (OCL). FIG. 5 is an explanatory diagram of the formation of a latent image using a photoreceptor having a conventional configuration of negatively charged CTL/CGL/conductive substrate. 1... Electrophotographic photoreceptor (11... Conductive substrate, 12... CTL, 13-C
GIl, 14...0CL) 2...Charging charger 3...Laser exposure 4...Developing section 5...Transfer charger 6...Fixing roller 7...Cleaning section 8...Quenching lamp 9...・Transfer object
Claims (1)
タ等に使用される電子写真感光体であって、導電性基体
上に電荷輸送層、電荷発生層、オーバーコート層が順次
積層されプラス帯電で使用されるものからなり、かつ、
該オーバーコート層は赤色光より短かい波長の光の透過
を実質的に遮蔽するものであることを特徴とする積層型
電子写真感光体。(1) An electrophotographic photoreceptor used in infrared or near-infrared LED or LD printers, in which a charge transport layer, a charge generation layer, and an overcoat layer are sequentially laminated on a conductive substrate. Consisting of those used with positive charge, and
A laminated electrophotographic photoreceptor, wherein the overcoat layer substantially blocks transmission of light having a wavelength shorter than red light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12867590A JPH0422967A (en) | 1990-05-18 | 1990-05-18 | Electrophotographic sensitive body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12867590A JPH0422967A (en) | 1990-05-18 | 1990-05-18 | Electrophotographic sensitive body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0422967A true JPH0422967A (en) | 1992-01-27 |
Family
ID=14990667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12867590A Pending JPH0422967A (en) | 1990-05-18 | 1990-05-18 | Electrophotographic sensitive body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0422967A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0614131A2 (en) * | 1993-03-01 | 1994-09-07 | Mita Industrial Co., Ltd. | Image forming apparatus |
| US20100248101A1 (en) * | 2009-03-27 | 2010-09-30 | Fuji Xerox Co., Ltd. | Electrophotographic photoreceptor, process cartridge and image forming apparatus |
| JP2011100119A (en) * | 2009-11-06 | 2011-05-19 | Xerox Corp | Light shock resistant overcoat layer |
-
1990
- 1990-05-18 JP JP12867590A patent/JPH0422967A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0614131A2 (en) * | 1993-03-01 | 1994-09-07 | Mita Industrial Co., Ltd. | Image forming apparatus |
| EP0614131A3 (en) * | 1993-03-01 | 1996-01-24 | Mita Industrial Co Ltd | Image forming apparatus. |
| US20100248101A1 (en) * | 2009-03-27 | 2010-09-30 | Fuji Xerox Co., Ltd. | Electrophotographic photoreceptor, process cartridge and image forming apparatus |
| US8283096B2 (en) * | 2009-03-27 | 2012-10-09 | Fuji Xerox Co., Ltd. | Electrophotographic photoreceptor, process cartridge and image forming apparatus |
| JP2011100119A (en) * | 2009-11-06 | 2011-05-19 | Xerox Corp | Light shock resistant overcoat layer |
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