JPH03259268A - Electrophotographic sensitive body - Google Patents
Electrophotographic sensitive bodyInfo
- Publication number
- JPH03259268A JPH03259268A JP5938590A JP5938590A JPH03259268A JP H03259268 A JPH03259268 A JP H03259268A JP 5938590 A JP5938590 A JP 5938590A JP 5938590 A JP5938590 A JP 5938590A JP H03259268 A JPH03259268 A JP H03259268A
- Authority
- JP
- Japan
- Prior art keywords
- intermediate layer
- thickness
- layer
- parts
- electrophotographic photoreceptor
- 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
- 229920005989 resin Polymers 0.000 claims abstract description 38
- 239000011347 resin Substances 0.000 claims abstract description 38
- 239000001023 inorganic pigment Substances 0.000 claims abstract description 8
- 108091008695 photoreceptors Proteins 0.000 claims description 51
- 239000011230 binding agent Substances 0.000 claims description 17
- 239000000126 substance Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 description 30
- 238000000576 coating method Methods 0.000 description 30
- 239000007788 liquid Substances 0.000 description 23
- 239000000049 pigment Substances 0.000 description 22
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 14
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 9
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 9
- 230000005484 gravity Effects 0.000 description 8
- 239000000843 powder Substances 0.000 description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 235000010724 Wisteria floribunda Nutrition 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 229920005668 polycarbonate resin Polymers 0.000 description 2
- 239000004431 polycarbonate resin Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- -1 α-phenylstilbene compound Chemical class 0.000 description 2
- WUPHOULIZUERAE-UHFFFAOYSA-N 3-(oxolan-2-yl)propanoic acid Chemical compound OC(=O)CCC1CCCO1 WUPHOULIZUERAE-UHFFFAOYSA-N 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 101100161935 Caenorhabditis elegans act-4 gene Proteins 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 235000000177 Indigofera tinctoria Nutrition 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229920002845 Poly(methacrylic acid) Polymers 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229910001370 Se alloy Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000004 White lead Inorganic materials 0.000 description 1
- 239000005083 Zinc sulfide Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- ZWLQACFYTXLLEJ-UHFFFAOYSA-N butan-1-ol;methanol Chemical compound OC.CCCCO ZWLQACFYTXLLEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052980 cadmium sulfide Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000005018 casein Substances 0.000 description 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 1
- 235000021240 caseins Nutrition 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 125000000664 diazo group Chemical group [N-]=[N+]=[*] 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229940097275 indigo Drugs 0.000 description 1
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 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
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 239000012463 white pigment Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 235000014692 zinc oxide Nutrition 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-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〕
本発明は導電性支持体上に中間層と光導電層とを順に積
層した感光体に関し、前記中間層が特定の顔料／樹脂比
からなる層であり、かつ、特定な膜厚を有しているもの
に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a photoreceptor in which an intermediate layer and a photoconductive layer are sequentially laminated on a conductive support, the intermediate layer comprising a specific pigment/resin ratio. It is a layer and has a specific thickness.
一般に電子写真感光体は繰返して使用すると、帯電性が
低下する傾向にある。特に有機光導電体を用いた感光体
においては近年、増々その耐久性向上が要求されるよう
になり、帯電安定性が無視できない問題となってきた。Generally, when an electrophotographic photoreceptor is used repeatedly, its charging property tends to decrease. In recent years, particularly in photoreceptors using organic photoconductors, there has been an increasing demand for improved durability, and charging stability has become a problem that cannot be ignored.
これを解決するために導電性基板と感光層との間に中間
層を設ける事が提案されている。この中間層としては例
えば以下のようなものがある。To solve this problem, it has been proposed to provide an intermediate layer between the conductive substrate and the photosensitive layer. Examples of this intermediate layer include the following.
（１）樹脂のみの薄い層
（２）樹脂中に導電性顔料を分散した層（３）樹脂中に
導電性顔料を分散した層の上に樹脂のみの層を設けたも
の
しかしながら、これらの中間層は次の欠点がある。（１
）及び（３）に示される中間層はピンホールの無い樹脂
の均一な膜を得るためにある程度の厚さが必要となり、
このため感光体特性に環境依存性が生じ、低湿時に残留
電位が上昇し、高温時に帯電性が低下するという難点が
あり、また（２）に示される中間層は帯電性が劣り、画
像劣化の原因となる。(1) Thin layer of only resin (2) Layer of conductive pigment dispersed in resin (3) Layer of only resin provided on a layer of conductive pigment dispersed in resin However, intermediate layer between these Layers have the following drawbacks: (1
) and (3) require a certain degree of thickness in order to obtain a uniform film of resin without pinholes.
For this reason, the characteristics of the photoreceptor become environmentally dependent, resulting in problems such as an increase in residual potential at low humidity and a decrease in charging performance at high temperatures.Furthermore, the intermediate layer shown in (2) has poor charging performance and is susceptible to image deterioration. Cause.
このように中間層を設けるのみでは感光体の帯電安定性
に係る耐久性を満足し、かつ、環境依存性の少ない感光
体は得られていない。In this way, only by providing an intermediate layer, it is not possible to obtain a photoreceptor that satisfies the durability related to the charging stability of the photoreceptor and has less environmental dependence.
本発明は、帯電性に優れると共に環境依存性が小さくか
つ耐久性の優れた電子写真感光体を提供することを目的
とする。SUMMARY OF THE INVENTION An object of the present invention is to provide an electrophotographic photoreceptor that has excellent charging properties, low environmental dependence, and excellent durability.
本発明者らは、この点を改良すべき鋭意検討した結果、
中間層の無機顔料と結着樹脂を特定な割合で使用すると
共にその膜厚を一定範囲に維持した場合には帯電性の低
下を防止でき、かつ耐久性に優れた電子写真感光体が得
られることを見い出し、本発明を完成するに至った。As a result of intensive study on how to improve this point, the inventors found that
If the inorganic pigment and binder resin in the intermediate layer are used in a specific ratio and the film thickness is maintained within a certain range, it is possible to prevent a decrease in chargeability and obtain an electrophotographic photoreceptor with excellent durability. This discovery led to the completion of the present invention.
すなわち１本発明によれば、導電性支持体上に中間層と
光導電層とを順に設けた電子写真感光体において、前記
中間層は無機顔料（Ｐ）と結着樹脂（Ｒ）との比率Ｐ／
Ｒが体積比で１／１〜３／ｌの範囲であり、かつ、その
膜厚が０．３〜６７ａであることを特徴とする電子写真
感光体が提供される。That is, according to the present invention, in an electrophotographic photoreceptor in which an intermediate layer and a photoconductive layer are sequentially provided on a conductive support, the intermediate layer has a ratio of an inorganic pigment (P) to a binder resin (R). P/
An electrophotographic photoreceptor is provided, characterized in that R is in the range of 1/1 to 3/l in terms of volume ratio, and the film thickness is 0.3 to 67a.
また、本発明によれば、光導電層が電荷発生層と電荷輸
送層からなり、電荷発生層中の電荷発生物質（Ｇ）と結
着剤樹脂（Ｒ□）の比率Ｇ／Ｒ１が体積比で１以上であ
ることを特徴とする上記の電子写真感光体が提供される
。Further, according to the present invention, the photoconductive layer is composed of a charge generation layer and a charge transport layer, and the ratio G/R1 of the charge generation substance (G) and the binder resin (R□) in the charge generation layer is a volume ratio. There is provided the electrophotographic photoreceptor described above, characterized in that the number is one or more.
以下、本発明を更に詳細に説明する。The present invention will be explained in more detail below.
導電性支持体としてはアルミニウム、ニッケル、ステン
レスなどの金属；カーボン等の導電性顔料を分散したプ
ラスチック；絶縁性支持体（プラスチック又はプラスチ
ックフィルムのごときもの）上に金属を蒸着した又は導
電性塗料を塗工したもの等が例示できる。Conductive supports include metals such as aluminum, nickel, and stainless steel; plastics with conductive pigments such as carbon dispersed; metals deposited on insulating supports (such as plastics or plastic films) or conductive paints. An example is a coated one.
中間層に用いる結着樹脂（Ｒ）としては適宜のものを用
いることができるが、その上に感光層を溶剤で塗布する
ことを考え合わせると、一般の有機溶剤に対して耐溶剤
性の高い樹脂が望ましい。このような樹脂としては、ポ
リビニルアルコール、カゼイン、ポリアクリル酸ナトリ
ウム等の水溶性樹脂；共重合ナイロン、メトキシメチル
化ナイロン等のアルコール可溶性欄脂；ポリウレタン、
メラミン樹脂、エポキシ樹脂等の三次元網目構造を形成
する硬化型樹脂などが挙げられる。Any suitable binder resin (R) can be used for the intermediate layer, but considering that a photosensitive layer is coated on top of it with a solvent, it is recommended that the binder resin (R) has high solvent resistance to general organic solvents. Resin is preferred. Examples of such resins include water-soluble resins such as polyvinyl alcohol, casein, and sodium polyacrylate; alcohol-soluble resins such as copolymerized nylon and methoxymethylated nylon; polyurethane,
Examples include curable resins that form a three-dimensional network structure, such as melamine resin and epoxy resin.
また、無機顔料（Ｐ）としては、可視光及び近赤外光に
吸収のほとんど無い白色又はこれに近いものが感光体の
高感度化を考えた時しこ望ましい。Further, as the inorganic pigment (P), it is desirable to use a white color having almost no absorption in visible light and near-infrared light, or something close to this, in view of increasing the sensitivity of the photoreceptor.
このような無機顔料としては、例えば、酸化チタン、亜
鉛華、硫化亜鉛、鉛白、リトポン等の白色顔料、アルミ
ナ、炭酸カルシウム、硫酸バリウム等の体質顔料等が挙
げられる。特にレーザー光のような可干渉光で画像の書
込みを行なうレーザープリンター等に用いる感光体の場
合はモアレの発生を防止するために屈折率の大きな白色
顔料を用いる方が良い。Examples of such inorganic pigments include white pigments such as titanium oxide, zinc white, zinc sulfide, white lead, and lithopone, and extender pigments such as alumina, calcium carbonate, and barium sulfate. Particularly in the case of photoreceptors used in laser printers and the like that write images using coherent light such as laser light, it is better to use a white pigment with a high refractive index in order to prevent the occurrence of moiré.
中間層に用いる無機顔料（Ｐ）と結着樹脂（Ｒ）の比率
Ｐ／Ｒは体積比で１７１〜３／１の範囲である。The ratio P/R of the inorganic pigment (P) and the binder resin (R) used in the intermediate layer is in the range of 171 to 3/1 in terms of volume ratio.
中間層のＰ／Ｒ比が１未満であると中間層は結着樹脂の
特性に左右され、特に温湿度の変化で感光体特性は変化
する。またＰ／Ｒ比が３を越えると中間層は層中に空隙
が多くなり空気がたまる。これが光導＠層の塗布乾燥時
に気泡となり塗膜欠陥を生じる。When the P/R ratio of the intermediate layer is less than 1, the intermediate layer is influenced by the properties of the binder resin, and in particular, the characteristics of the photoreceptor change with changes in temperature and humidity. Further, when the P/R ratio exceeds 3, the intermediate layer has many voids and air accumulates therein. This becomes bubbles when the light guiding @ layer is applied and dried, causing coating film defects.
また１本発明においては、中間層の膜厚を０．３μｆｆ
１〜６．０ｐｍの範囲に設定することが必要である。In addition, in the present invention, the thickness of the intermediate layer is 0.3 μff.
It is necessary to set it within the range of 1 to 6.0 pm.
中間層の膜厚が０．３戸未満であると、中間層としての
機能が充分に発現せずピンホールを生じ、画像上に自模
様が発生する。また中間層の膜厚が６．０．ｕｍを越え
ると塗膜面の平滑性が失なわれ、感光体の感度が低下し
、また繰り返し使用における帯電性が低下するので望ま
しくない。更に、光導電層との接着性を考慮したときに
は５μｍ以下の膜厚とするのが好ましい。If the thickness of the intermediate layer is less than 0.3 mm, the function of the intermediate layer will not be fully expressed, resulting in pinholes and self-patterning on the image. Also, the thickness of the intermediate layer is 6.0. If it exceeds um, the smoothness of the coated film surface will be lost, the sensitivity of the photoreceptor will be reduced, and the charging property during repeated use will be reduced, which is undesirable. Furthermore, when considering adhesiveness with the photoconductive layer, the film thickness is preferably 5 μm or less.
本発明に用いる光導電層としては（１）電子供与性化合
物と電子受容性化合物との組合せにより電荷移動錯体を
形成したもの（ＵＳＰ３４８４２３７に記載）、（２）
有機光導電体に染料を添加して増感したもの（特公昭４
８−２５６５８号公報に記載）、（３）正孔あるいは電
子活性マトリックスに顔料を分散したもの（特開昭４７
−３０３２８号、特開昭４７−１８５４５号などの公報
に記載）、（４）電荷発生層と電荷輸送層とに機能分離
したもの（特開昭４９−１０５５３７号公報に記載）、
（５）染料及び樹脂からなる共晶鎖体を主成分とするも
の（特開昭４７−１０７８５号公報に記載）、（６）電
荷移動錯体中に有機顔料ないしは無機電荷発生材料を添
加したもの（特開昭４９−９１６４８号公報に記載）な
ど従来から知られている有機光導電体のいずれで形成さ
れていてもかまわない。The photoconductive layer used in the present invention includes (1) a charge transfer complex formed by a combination of an electron-donating compound and an electron-accepting compound (described in US Pat. No. 3,484,237); (2)
Organic photoconductor sensitized by adding dye (Special Publication Act 4
8-25658), (3) Pigment dispersed in a hole- or electron-active matrix (Japanese Patent Laid-Open No. 47
-30328, JP-A-47-18545, etc.), (4) functionally separated charge generation layer and charge transport layer (described in JP-A-49-105537),
(5) Those whose main component is a eutectic chain consisting of a dye and a resin (described in JP-A-47-10785), (6) Those in which an organic pigment or an inorganic charge-generating material is added to a charge transfer complex. It may be formed of any conventionally known organic photoconductor such as (described in JP-A-49-91648).
しかし、これらの中でも特に（４）のタイプの積層型感
光体は高感度であり、かつ、機能にあわせて多様に材料
が選択できる等から本発明においては好ましく使用され
る。However, among these, the laminated photoreceptor of type (4) is particularly preferred in the present invention because it has high sensitivity and allows a variety of materials to be selected depending on the function.
電荷発生層はアゾ系顔料、フタロシアニン系顔料、スク
エアリンク顔料、インジゴ系顔料、ペリレン系顔料、セ
レン粉末、セレン合金粉末、アモルファスシリコン粉末
、酸化亜鉛粉末、硫化カドミウム粉末のごとき電荷発生
物質（Ｇ）をポリエステル、ポリカーボネート、ポリビ
ニルブチラール、アクリル樹脂などの結着樹脂（Ｒユ）
溶液中に分散し、これを中間層上に塗工することにより
形成される。The charge generation layer is a charge generation material (G) such as an azo pigment, a phthalocyanine pigment, a square link pigment, an indigo pigment, a perylene pigment, a selenium powder, a selenium alloy powder, an amorphous silicon powder, a zinc oxide powder, or a cadmium sulfide powder. Binder resin (R) such as polyester, polycarbonate, polyvinyl butyral, acrylic resin, etc.
It is formed by dispersing it in a solution and coating it on the intermediate layer.
電荷発生層の厚さは、繰り返し使用における帯電性の低
下等感光体特性の劣化を防止するために０．０１〜２μ
ｍくらいが適当である。The thickness of the charge generation layer is 0.01 to 2 μm in order to prevent deterioration of photoreceptor characteristics such as a decrease in chargeability during repeated use.
About m is appropriate.
この場合、前記電荷発生物質（Ｇ）と前記結着樹脂（Ｒ
工）の使用割合は高感度感光体とするためにはＧ／Ｒ１
が体積比で１以上としておくことが望ましい。In this case, the charge generating substance (G) and the binder resin (R
The ratio of G/R1 used is G/R1 in order to make a highly sensitive photoreceptor.
It is desirable that the volume ratio is 1 or more.
電荷輸送層はα−フェニルスチルベン化合物（特開昭５
８−１９８０４３号公報に記載）、ヒドラゾン化合物（
特開昭５５−４６７６０号公報に記載）などの電荷輸送
性物質を成膜性のある樹脂例えばポリエステル、ポリサ
ルホン、ポリカーボネート、ポリメタクリル酸エステル
類、ポリスチレンなどに溶解させ、これを電荷発生層上
に厚さ１０〜４０−程度に塗工すればよい。ここで成膜
性樹脂が用いられるのは、電荷輸送性物質が一般に低分
子量でそれ自身では成膜性に乏しいためである。The charge transport layer is an α-phenylstilbene compound (Japanese Patent Application Laid-open No.
8-198043), hydrazone compounds (
A charge transporting substance such as those described in JP-A No. 55-46760 is dissolved in a film-forming resin such as polyester, polysulfone, polycarbonate, polymethacrylic acid ester, polystyrene, etc., and this is applied onto the charge generation layer. The coating may be applied to a thickness of about 10 to 40 mm. The film-forming resin is used here because the charge transporting substance generally has a low molecular weight and has poor film-forming properties by itself.
また電荷発生層と電荷輸送層の積層順を逆にして正帯電
用の感光体とすることもできる。Furthermore, a photoreceptor for positive charging can be obtained by reversing the stacking order of the charge generation layer and the charge transport layer.
以下、実施例により本発明を更に詳細に説明する。なお
、部はいずれも重量基準である。Hereinafter, the present invention will be explained in more detail with reference to Examples. Note that all parts are based on weight.
実施例１
直径８０ｒｎＩ１１．長さ３６０ｍｍのアルミニウムド
ラム上に下記の中間層塗工液Ａを塗布し、膜厚５．５部
ｍの中間層を形成した。Example 1 Diameter 80rnI11. The following intermediate layer coating solution A was applied onto an aluminum drum having a length of 360 mm to form an intermediate layer having a film thickness of 5.5 parts m.
メチルエチルケトン ７０
部酸化チタン粉末（ＴＭ−１富士チタン工業製＞
９０部前記威分をボールミルで１２時間分散し、
中間層塗工液Ａを調製した。なお、かかる中間層は酸化
チタンの比重が４．２、結着樹脂の比重が１．３である
から、顔料（Ｐ）／結着樹脂（Ｒ）の体積比率は１．９
／１となる。Methyl ethyl ketone 70
Partial titanium oxide powder (TM-1 manufactured by Fuji Titanium Industries)
Disperse 90 parts of the above ingredients in a ball mill for 12 hours,
Intermediate layer coating liquid A was prepared. In this intermediate layer, the specific gravity of titanium oxide is 4.2 and the specific gravity of binder resin is 1.3, so the volume ratio of pigment (P)/binder resin (R) is 1.9.
/1.
次にブチラール樹脂〔エスレックＢＬＳ （積木化学Ｉ
ｆり）５部をシクロへキサノン１５０部に溶解し、これ
に下記構造式のトリスアゾ顔料１０部を加えボールミル
にて４８時間分散した。Next, butyral resin [S-LEC BLS (Building Chemical I)
(f) was dissolved in 150 parts of cyclohexanone, 10 parts of a trisazo pigment having the following structural formula was added thereto, and the mixture was dispersed in a ball mill for 48 hours.
更に、シクロへキサノン２１０部を加え３時間分散を行
なった。これを固形分が１．５ｗｔ％にむるように、撹
拌しながら、シクロヘキサノンで希釈した。こうして得
られた電荷発生層用塗布液を前記中間層上に塗布乾燥し
、厚さ約０．２μｍの電荷発生層を形成した。Furthermore, 210 parts of cyclohexanone was added and dispersion was carried out for 3 hours. This was diluted with cyclohexanone while stirring so that the solid content was 1.5 wt%. The charge generation layer coating liquid thus obtained was applied onto the intermediate layer and dried to form a charge generation layer having a thickness of about 0.2 μm.
更に、下記構造式の電荷輸送物質６部、ポリカーボネー
ト樹脂（パンライトに−１３００（帝人化或製）〕１１
０部シリコンオイル［ＫＦ−５０（信越化学工業製）〕
０゜００２部を９０部の塩化メチレンに溶解した。Furthermore, 6 parts of a charge transporting substance having the following structural formula, polycarbonate resin (Panlite-1300 (manufactured by Teijin Chemical Co., Ltd.)) 11
0 parts silicone oil [KF-50 (manufactured by Shin-Etsu Chemical)]
0.002 parts were dissolved in 90 parts of methylene chloride.
こうして得られた電荷輸送層用塗布液を前記電荷発生層
上に塗布乾燥し厚さ２３μｍの電荷輸送層を形成し、電
子写真用感光体を作成した。The charge transport layer coating liquid thus obtained was applied onto the charge generation layer and dried to form a charge transport layer having a thickness of 23 μm, thereby producing an electrophotographic photoreceptor.
実施例２
実施例１において、中間層の膜厚を３．０−とした以外
は実施例１と同様にして電子写真感光体を作成した。Example 2 An electrophotographic photoreceptor was produced in the same manner as in Example 1 except that the thickness of the intermediate layer was changed to 3.0-.
実施例３
実施例１において、中間層の膜厚を１．５−とじた以外
は実施例１と同様にして電子写真感光体を作成した。Example 3 An electrophotographic photoreceptor was produced in the same manner as in Example 1 except that the thickness of the intermediate layer was 1.5-mm.
比較例１
実施例１において、中間層の膜厚を８．５μｍとした以
外は実施例１と同様にして電子写真感光体を作成した。Comparative Example 1 An electrophotographic photoreceptor was produced in the same manner as in Example 1 except that the thickness of the intermediate layer was 8.5 μm.
実施例４
実施例１において、〔中間層塗工液＾〕を下記の〔中間
層塗工液Ｂ〕に代え、かつ中間層の膜厚を０．４μｍと
した以外は実施例１と同様にして電子写真感光体を作成
した。Example 4 The same procedure as in Example 1 was carried out except that the [intermediate layer coating liquid ^] in Example 1 was replaced with the following [intermediate layer coating liquid B], and the thickness of the intermediate layer was changed to 0.4 μm. An electrophotographic photoreceptor was prepared.
中間層塗工液Ａ ７０部メチルエチル
ケトン ３０部比較例２
実施例４において、中間層の膜厚を０．２μ閣とした以
外は実施例１と同様にして電子写真感光体を作成した。Intermediate layer coating liquid A 70 parts Methyl ethyl ketone 30 parts Comparative example 2 An electrophotographic photoreceptor was prepared in the same manner as in Example 1 except that the thickness of the intermediate layer was 0.2 μm in Example 4.
比較例３
実施例２の酸化チタン粉末の量を４０部に代えた以外は
実施例２とまったく同様に電子写真感光体を作成した。Comparative Example 3 An electrophotographic photoreceptor was produced in exactly the same manner as in Example 2, except that the amount of titanium oxide powder in Example 2 was changed to 40 parts.
この場合、中間層中の顔料／樹脂比に体積比で約０．８
／１となる。In this case, the pigment/resin ratio in the intermediate layer is approximately 0.8 by volume.
/1.
比較例４
実施例２の酸化チタン粉末の量を１６０部に変えた以外
は、実施例２とまったく同様に電子写真感光体を作成し
たが、電荷輸送層塗布時に気泡が発生してしまった。こ
の場合、中間層中の顔料／樹脂比は体積比で３．３／１
となる。Comparative Example 4 An electrophotographic photoreceptor was prepared in exactly the same manner as in Example 2, except that the amount of titanium oxide powder in Example 2 was changed to 160 parts, but bubbles were generated when the charge transport layer was applied. In this case, the pigment/resin ratio in the intermediate layer is 3.3/1 by volume.
becomes.
以上得られた感光体は反転現像方式のイマジ第３２０（
（株）リコー製〕で画像コピーを行ない、初期と５千枚
後の画像品質を評価した。また、初期と５千枚コピー後
にイマジ第３２０の現像位置に表面電位計を取り付は露
光部と非露光部の表面電位を測定した。その結果を表−
１に示す。The photoreceptor obtained above was used as a reversal development type Imagi No. 320 (
[manufactured by Ricoh Co., Ltd.] was used to copy images, and the image quality at the initial stage and after 5,000 copies was evaluated. In addition, a surface electrometer was attached to the development position of Imagi No. 320 at the initial stage and after copying 5,000 copies, and the surface potential of the exposed and non-exposed areas was measured. Table the results.
Shown in 1.
なお、比較例４の電子写真感光体は電荷輸送層に気泡が
多発したため５万枚のランとその後の評価は行なわなか
った。Incidentally, in the electrophotographic photoreceptor of Comparative Example 4, a run of 50,000 sheets and subsequent evaluation was not performed because many bubbles were generated in the charge transport layer.
実施例５
アルミ蒸着ポリエステルフィルム上に下記の中間層塗工
液Ｃを塗布し、膜厚６．０μｍの中間層を形成した。Example 5 The following intermediate layer coating solution C was applied onto an aluminum vapor-deposited polyester film to form an intermediate layer having a thickness of 6.0 μm.
表−１
メタノール
ｎ−ブタノール
前記成分をボールミルで１２時間分散し、中間層塗工液
Ｃを調製した。なお、この中間層の結着樹脂の比重は１
．１、また酸化チタンの比重は３．９であるため、顔料
（Ｐ）／結着樹脂（Ｒ）の体積比は１．４／１となる。Table 1 Methanol n-butanol The above components were dispersed in a ball mill for 12 hours to prepare intermediate layer coating liquid C. Note that the specific gravity of the binder resin in this intermediate layer is 1
．． 1, and since the specific gravity of titanium oxide is 3.9, the volume ratio of pigment (P)/binder resin (R) is 1.4/1.
次にブチラール樹脂〔エスレツクＢＬＳ （積木化学製
）〕３部をシクロへキサノン１５０部に溶解し、これに
下記構造式のビスアゾ顔料６部を加え、ボールミルで４
８時間分散し、更にシクロヘキサノン２１０部を加え１
２時間分散した。これを固型分が１ｗｔ％になるように
更にシクロヘキサノンを加えた。こうして得られた電荷
発生層用塗布液を前記中間層上に塗布乾燥し、厚さ約０
．２μｍの電荷発生層を作成した。Next, 3 parts of butyral resin [Eslec BLS (manufactured by Block Chemical Co., Ltd.)] was dissolved in 150 parts of cyclohexanone, 6 parts of bisazo pigment with the following structural formula was added, and 4 parts of the resin was dissolved in a ball mill.
After dispersing for 8 hours, 210 parts of cyclohexanone was added and 1
Dispersed for 2 hours. Cyclohexanone was further added to this so that the solid content was 1 wt%. The charge generation layer coating liquid thus obtained was applied onto the intermediate layer and dried to a thickness of approximately 0.
．． A charge generation layer of 2 μm was prepared.
更に
下記構造式の電荷輸送物質
を８６部のテトラヒドロフランに溶解した。こうして得
られた電荷輸送層用塗布液を前記電荷発生層上に塗布乾
燥し、厚さ２０μの電荷輸送層を形成し、電子写真用感
光体を作成した。Furthermore, a charge transport material having the following structural formula was dissolved in 86 parts of tetrahydrofuran. The charge transport layer coating liquid thus obtained was applied onto the charge generation layer and dried to form a charge transport layer with a thickness of 20 μm, thereby producing an electrophotographic photoreceptor.
実施例６
実施例５において、中間層の膜厚を２．５μとした以外
は実施例５と同様にして電子写真感光体を作成した。Example 6 An electrophotographic photoreceptor was produced in the same manner as in Example 5 except that the thickness of the intermediate layer was 2.5 μm.
実施例７
実施例５において、中間層の膜厚を０．５．とじた以外
は実施例５と同様にして電子写真感光体を作成した。Example 7 In Example 5, the thickness of the intermediate layer was set to 0.5. An electrophotographic photoreceptor was produced in the same manner as in Example 5 except for binding.
比較例５
実施例５において、中間層の膜厚を７．ＯＩＡとした以
外は実施例５と同様にして電子写真感光体を作成した。Comparative Example 5 In Example 5, the thickness of the intermediate layer was set to 7. An electrophotographic photoreceptor was produced in the same manner as in Example 5 except that OIA was used.
比較例６
実施例５において、中間層の膜厚を０．２５μとした以
外は実施例５と同様にして電子写真感光体を作成した。Comparative Example 6 An electrophotographic photoreceptor was produced in the same manner as in Example 5 except that the thickness of the intermediate layer was 0.25 μm.
以上得られた感光体を周長４６０Ｌ巾３４１＋ａ＋ｓの
エンドレスベルト状に加工し、リコピーＦＴ−２０５０
で５千枚の画像をコピーし、初期と５千枚後の画像品質
を評価した。また、画像コピー前と５千枚コピー後に、
ＦＴ−２０５０の現像位置に表面電位計を取り付け、
露光部と非露光部の表面電位を測定した。The photoreceptor obtained above was processed into an endless belt shape with a circumference of 460L and a width of 341+a+s.
We copied 5,000 images and evaluated the image quality at the initial stage and after 5,000 copies. Also, before copying images and after copying 5,000 copies,
Attach a surface electrometer to the development position of FT-2050,
The surface potential of the exposed and non-exposed areas was measured.
評価結果を表−２に示す。The evaluation results are shown in Table-2.
表−２
〔中間層塗工液Ｄ〕
メチルエチルケトン ７０
部酸化チタン粉末（ＴＭ−１富士チタン工業製）９０部
前記成分をボールミルで１２時間分散し、中間層塗工液
りを調製した。なお、かかる中間層は酸化チタンの比重
が４．２、結着樹脂の比重が１．３であるから、顔料（
Ｐ）／結着樹脂（Ｒ）の体積比率は１．９／１となる。Table-2 [Intermediate layer coating liquid D] Methyl ethyl ketone 70
90 parts of titanium oxide powder (TM-1 manufactured by Fuji Titanium Industries) The above components were dispersed in a ball mill for 12 hours to prepare an intermediate layer coating liquid. In addition, since the specific gravity of titanium oxide in this intermediate layer is 4.2 and the specific gravity of the binder resin is 1.3, the pigment (
The volume ratio of P)/binder resin (R) was 1.9/1.
次にブチラール樹脂〔エスレックＢＬＳ（種水化学＊）
１５部をシクロへキサノン１５０部に溶解し、これに下
記構造式のトリスアゾ顔料１０重量部を加えボールミル
にて４８時間分散した。Next, butyral resin [S-LEC BLS (Tanesui Chemical*)
15 parts were dissolved in 150 parts of cyclohexanone, 10 parts by weight of a trisazo pigment having the following structural formula was added thereto, and the mixture was dispersed in a ball mill for 48 hours.
実施例８
厚さ０．２■のアルミニウム板上に下記の中間層塗工液
りを塗布し、膜厚５．５−の中間層を形成した。Example 8 The following intermediate layer coating liquid was coated on an aluminum plate having a thickness of 0.2 cm to form an intermediate layer having a thickness of 5.5 mm.
００２部を９０部の塩化メチレンに溶解した。002 parts were dissolved in 90 parts of methylene chloride.
更に、シクロへキサノン２１０部を加え３時間分散を行
なった。これを固形分が１．５ｗｔ％になるように。Furthermore, 210 parts of cyclohexanone was added and dispersion was carried out for 3 hours. Adjust this so that the solid content is 1.5 wt%.
撹拌しながら、シクロヘキサノンで希釈した。こうして
得られた電荷発生層用塗布液を前記中間層上に塗布乾燥
し、厚さ約０．２−の電荷発生層を形成した。ブチラー
ル樹脂は比重１．１、トリスアゾ顔料は比重１．３であ
るから電荷発生層用塗布液の電荷発生物質（Ｇ）／樹脂
（Ｒ工）の体積比は１．７となる。Diluted with cyclohexanone while stirring. The charge generation layer coating liquid thus obtained was applied onto the intermediate layer and dried to form a charge generation layer having a thickness of about 0.2 mm. Since the butyral resin has a specific gravity of 1.1 and the trisazo pigment has a specific gravity of 1.3, the volume ratio of the charge generating substance (G)/resin (R process) in the coating liquid for the charge generating layer is 1.7.
更に、下記構造式の電荷輸送物質６部、ポリカーボネー
ト樹脂〔パンライトに−１３００（帝人化戊製）〕１１
０部シリコンオイル（ＫＦ−５０（信越化学工業製）〕
０゜こうして得られた電荷輸送層用塗布液を前記電荷発
生層上に塗布乾燥し厚さ２３μＩｌ＋の電荷輸送層を形
成し、電子写真用感光体を作成した。Furthermore, 6 parts of a charge transport substance having the following structural formula, 11 parts of a polycarbonate resin [Panlite-1300 (manufactured by Teijin Kaisha)]
0 parts silicone oil (KF-50 (manufactured by Shin-Etsu Chemical))
0° The thus obtained charge transport layer coating liquid was applied onto the charge generation layer and dried to form a charge transport layer having a thickness of 23 μIl+ to prepare an electrophotographic photoreceptor.
実施例９
実施例８において、中間層の膜厚を’ｌ、０ｐＩＩｌと
した以外は実施例８と同様にして電子写真感光体を作成
した。Example 9 An electrophotographic photoreceptor was produced in the same manner as in Example 8, except that the thickness of the intermediate layer was set to 'l and 0 pIIl.
実施例１０
実施例８において、〔中間層塗工液Ｄ〕を下記の〔中間
層塗工液Ｅ〕に代え、かつ中間層の膜厚を０．４μｍと
した以外は実施例８と同様にして電子写真感光体を作成
した。Example 10 Same as Example 8 except that [Intermediate layer coating liquid D] was replaced with [Intermediate layer coating E] below and the thickness of the intermediate layer was changed to 0.4 μm. An electrophotographic photoreceptor was prepared.
中間層塗工液Ｉ） ７０部メチルエ
チルケトン ３０部比較例７
実施例８において、中間層の膜厚を６．５μｍとした以
外は実施例８と同様にして電子写真感光体を作成した。Intermediate layer coating liquid I) 70 parts Methyl ethyl ketone 30 parts Comparative Example 7 An electrophotographic photoreceptor was prepared in the same manner as in Example 8 except that the thickness of the intermediate layer was changed to 6.5 μm.
比較例８
実施例１０において、中間層の膜厚を０．２μｎ；とし
た以外は実施例８と同様にして電子写真感光体を作成し
た。Comparative Example 8 An electrophotographic photoreceptor was produced in the same manner as in Example 8 except that the thickness of the intermediate layer was changed to 0.2 μm.
比較例９
実施例８において、電荷発生層のトリスアゾ顔料（Ｇ）
とブチラール樹脂（Ｒ工）との比、 （Ｇ）／（Ｒ□）
比が体積比で０．８５（重量比で１）にした以外は、実
施例８とまったく同様に感光体を作成した。Comparative Example 9 In Example 8, the trisazo pigment (G) in the charge generation layer
Ratio between and butyral resin (R), (G)/(R□)
A photoreceptor was prepared in exactly the same manner as in Example 8, except that the ratio was set to 0.85 by volume (1 by weight).
実施例１１
実施例８において、中間層の膜厚を１．５−とじ、かつ
電荷発生物質を下記のものに
電荷輸送物質を下記のものに
に代えた以外は実施例８と同様にして電子写真感光体を
作成した。Example 11 Electrons were produced in the same manner as in Example 8, except that the thickness of the intermediate layer was 1.5 mm, and the charge-generating substance was replaced with the one shown below, and the charge transport material was replaced with the one shown below. A photographic photoreceptor was created.
比較例１０
実施例１１の中間層膜厚を６．５μａ１にした以外は実
施例１１と同様に感光体を作ｊ戊した。Comparative Example 10 A photoreceptor was manufactured in the same manner as in Example 11 except that the intermediate layer thickness was changed to 6.5 μa1.
比較例１１
実施例１１において、中間層塗工液りを中間層塗工液Ｅ
に代え、その膜厚を０．２部ｍとした以外は実施例１１
と同様にして電子写真感光体を作成した。Comparative Example 11 In Example 11, the intermediate layer coating liquid was replaced with intermediate layer coating liquid E.
Example 11 except that the film thickness was changed to 0.2 part m instead of
An electrophotographic photoreceptor was prepared in the same manner as described above.
比較例１２
実施例１１の電荷発生層塗布液の電荷発生物質／榴脂比
を体積比で０．９とした以外は実施例８と同様に感光体
を作成した。Comparative Example 12 A photoreceptor was prepared in the same manner as in Example 8, except that the charge generation substance/shrine resin ratio in the charge generation layer coating solution of Example 11 was set to 0.9 in terms of volume ratio.
比較例１３
実施例１１の中間層処方で酸化チタン粉末の量を４５部
にした以外は実施例１１と同様に感光体を作成した。Comparative Example 13 A photoreceptor was produced in the same manner as in Example 11, except that the amount of titanium oxide powder was changed to 45 parts in the intermediate layer formulation.
以上得られた感光体を川口電機製エレクトロスタティッ
クペーパーアナライザ、５Ｄ４２８を用いて帯電性の評
価として一１０００Ｖから暗減衰１０秒後の表面電位（
Ｖ）を求め、感度の評価として、−８００Ｖから一１０
０Ｖに光減衰させるのに必要な露光量（Ｑｕ＊−５ｅｅ
）を求めた。また接着性の評価は感光体をｌ１ｌｉ／ｃ
ｍの短冊状に切り、光導電層をアルミニウム基体から１
８０℃の方向に引きはがすのに必要な力（ｇ）として求
めた。結果を表−３に示す。The electrostatic paper analyzer 5D428 manufactured by Kawaguchi Electric Co., Ltd. was used to evaluate the chargeability of the photoreceptor obtained above.
V), and as a sensitivity evaluation, -800V to -10
Exposure amount required to attenuate light to 0V (Qu*-5ee
) was sought. In addition, the adhesion was evaluated using the photoreceptor as l1li/c.
Cut the photoconductive layer into 1 m strips from the aluminum substrate.
It was determined as the force (g) required to peel it off in the direction of 80°C. The results are shown in Table-3.
表−３Table-3
Claims (2)
た電子写真感光体において、前記中間層は無機顔料（Ｐ
）と結着樹脂（Ｒ）との比率Ｐ／Ｒが体積比で１／１〜
３／１の範囲であり、かつ、その膜厚が０．３〜６μｍ
であることを特徴とする電子写真感光体。(1) In an electrophotographic photoreceptor in which an intermediate layer and a photoconductive layer are sequentially provided on a conductive support, the intermediate layer contains an inorganic pigment (P
) and the binder resin (R), the ratio P/R is 1/1 to 1/1 by volume.
3/1 and the film thickness is 0.3 to 6 μm
An electrophotographic photoreceptor characterized by:
荷発生層中の電荷発生物質（Ｇ）と結着剤樹脂（Ｒ＿１
）の比率Ｇ／Ｒ＿１が体積比で１以上であることを特徴
とする特許請求の範囲第１項記載の電子写真感光体。(2) The photoconductive layer consists of a charge generation layer and a charge transport layer, and the charge generation substance (G) in the charge generation layer and the binder resin (R_1
2. The electrophotographic photoreceptor according to claim 1, wherein the ratio G/R_1 of ) is 1 or more in terms of volume ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5938590A JPH03259268A (en) | 1990-03-09 | 1990-03-09 | Electrophotographic sensitive body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5938590A JPH03259268A (en) | 1990-03-09 | 1990-03-09 | Electrophotographic sensitive body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03259268A true JPH03259268A (en) | 1991-11-19 |
Family
ID=13111763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5938590A Pending JPH03259268A (en) | 1990-03-09 | 1990-03-09 | Electrophotographic sensitive body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03259268A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5391448A (en) * | 1992-06-22 | 1995-02-21 | Sharp Kabushiki Kaisha | Electrophotographic photoconductor and a method for manufacturing the same |
| US7378212B2 (en) | 2005-07-01 | 2008-05-27 | Konica Minolta Business Technologies, Inc. | Image forming method, photoreceptor |
-
1990
- 1990-03-09 JP JP5938590A patent/JPH03259268A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5391448A (en) * | 1992-06-22 | 1995-02-21 | Sharp Kabushiki Kaisha | Electrophotographic photoconductor and a method for manufacturing the same |
| US7378212B2 (en) | 2005-07-01 | 2008-05-27 | Konica Minolta Business Technologies, Inc. | Image forming method, photoreceptor |
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