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EP0000581B1 - Matériau d'enregistrement électrophotographique - Google Patents

Matériau d'enregistrement électrophotographique Download PDF

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Publication number
EP0000581B1
EP0000581B1 EP78100506A EP78100506A EP0000581B1 EP 0000581 B1 EP0000581 B1 EP 0000581B1 EP 78100506 A EP78100506 A EP 78100506A EP 78100506 A EP78100506 A EP 78100506A EP 0000581 B1 EP0000581 B1 EP 0000581B1
Authority
EP
European Patent Office
Prior art keywords
layer
recording material
cellulose
charge
acyl ester
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP78100506A
Other languages
German (de)
English (en)
Other versions
EP0000581A2 (fr
EP0000581A3 (en
Inventor
Wolfgang Dr. Wiedemann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoechst AG
Original Assignee
Hoechst AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hoechst AG filed Critical Hoechst AG
Publication of EP0000581A2 publication Critical patent/EP0000581A2/fr
Publication of EP0000581A3 publication Critical patent/EP0000581A3/xx
Application granted granted Critical
Publication of EP0000581B1 publication Critical patent/EP0000581B1/fr
Expired legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/02—Charge-receiving layers
    • G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
    • G03G5/05—Organic bonding materials; Methods for coating a substrate with a photoconductive layer; Inert supplements for use in photoconductive layers
    • G03G5/0528—Macromolecular bonding materials
    • G03G5/0557—Macromolecular bonding materials obtained otherwise than by reactions only involving carbon-to-carbon unsatured bonds
    • G03G5/0585—Cellulose and derivatives
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/10—Bases for charge-receiving or other layers
    • G03G5/102—Bases for charge-receiving or other layers consisting of or comprising metals

Definitions

  • the invention relates to electrophotographic recording material comprising an electrically conductive layer support, optionally an insulating intermediate layer and a photoconductive layer comprising at least one charge carrier-producing and charge-transporting layer, binder and conventional additive-containing layer.
  • the invention relates in particular to recording material whose photoconductive layer consists of a charge-generating layer and a layer with a charge-transporting compound.
  • Photoconductive layers are e.g. known from German Offenlegungsschriften 21 08 935, 21 08 938, 21 08 944, 21 08 958, 21 08 968, 21 08 984 and 21 08 992.
  • the mechanical properties are disadvantageous when the polyvinylcarbazole used and mainly described is not very flexible as a charge transport layer and, owing to its large molecular weight and its chemical nature, is only slightly compatible or miscible with binders and resins.
  • the adhesion of such layers on the electrically conductive substrate is insufficient for practical purposes.
  • the use of these materials is limited to photoconductive arrangements that are not mechanically resilient.
  • German laid-open publications 22 20 408, 23 14 051 and 23 53 639 describe well-adhering and also flexible, photoconductive layers, but these are also sufficient when used in mechanically stressed, self-supporting recording materials such as e.g. Photoconductor tapes do not yet meet all requirements. If the recording material is repeatedly guided over rollers, fine hairline cracks appear on the photoconductive surface. This bending stress on the photoconductive layer, which can also be located on a relatively thick substrate, causes its gradual mechanical destruction.
  • an electrophotographic recording material comprising an electrically conductive layer support, optionally an insulating intermediate layer and a photoconductive layer with a charge-generating compound and charge-transporting compound, binder and conventional additives or a photoconductive layer consisting of a layer optionally containing a binder with charge carrier Compound and a layer with charge-transporting compound, binder and conventional additives and is characterized in that the recording material contains as a binder cellulose acyl ester with an acetyl content of at most 30% and a viscosity above 15 poises, measured according to ASTM D 817-65, formulas A and D 1343-56.
  • the cellulose acyl ester preferably has an acetyl content of at most 15% with a viscosity of over 15, in particular over 50 poises.
  • the acyl groups preferably have two to four carbon atoms.
  • the viscosity is determined according to ASTM D 817-65, formulas A and D 1343-56 by dissolving 20 parts by weight of cellulose acyl ester in 8 parts by weight of ethanol (95% by volume) and 72 parts by weight of acetone using the ball drop method at 25 ° C.
  • electrophotographic recording material can be made available which, in comparison with materials with the previously known and customary binders, has the same good photosensitivity and a low residual charge, a great flexibility.
  • a recording material which contains a cellulose acetobutyrate with a maximum of 15% acetyl content and a viscosity in the range of 60-110 poises, measured according to ASTM D 817-65, formulas A and D 1343-56, has proven useful for particularly strong mechanical loads . Repeated guiding via roles takes place e.g. in the bending stress test and usually happens 5000 times.
  • the arrangement of a simple photoconductive layer has the advantage of being simple to produce (FIG. 1).
  • the arrangement in separate charge carrier generating layer and charge transport layer has the advantage of the compact arrangement of the particles and the optimal charge carrier generation rate (FIGS. 2-4).
  • Binders including cellulose esters, in protective layers over photoconductive layers, as are known, for example, from DE-B-15 72 347.
  • these protective layers can be added with conductivity-increasing substances in a resistance range of the layer between 10 7 ⁇ 10 9 ⁇ and on the other hand with organic substances carrying charges.
  • these compositions are not suitable for the recording material according to the invention.
  • Numeral 1 indicates the electrically conductive layer support
  • number 2 shows the charge-generating layer
  • Number 3 indicates the charge transport layer
  • number 4 indicates the insulating intermediate layer.
  • Section 5 shows layers which represent a charge generation layer in dispersion.
  • Numeral 6 shows a photoconductive layer of photoconductor as a charge-transporting compound, dye as a charge carrier-producing compound and binder, etc.
  • Aluminum foil or also transparent, aluminum-coated polyester film or aluminum-clad polyester film with a thickness are preferably used as the electrically conductive layer support. ⁇ 300 to use. However, other electrically conductive substrate material can also be used.
  • the layer support can be a flexible endless belt, e.g. represent from nickel or steel. According to the invention, a layer support is used which works as a band, is largely rigid transversely to the direction of travel and is flexible and dimensionally stable along the direction of travel. In addition to a band made of metal, which already fulfills these conditions very well at thicknesses of 100-120 ⁇ m, aluminum-vapor-coated polyester films of sufficient thickness are used, mainly in the range of 75-250 pm. It has been shown that the greater thickness of this substrate is necessary for the rigidity. Accordingly, a correspondingly greater flexibility of the applied coating is required.
  • straps can be formed with layers as layer supports, which are used in high-speed copying machines.
  • the insulating intermediate layer 4 can consist of organic material or, if appropriate, also of a thermally, anodically or chemically produced aluminum oxide intermediate layer, and, in addition to providing adhesion, has the aim, for example, of reducing the charge carrier injection from the layer carrier into the photoconductive layer in the dark by its arrangement. On the other hand, it does not hinder the flow of charge during the exposure process.
  • Resin binders can be used, such as polyamide resins, polyvinylphosphonic acid, polyurethanes or polyester resins. Their thickness can be up to 5 ⁇ m, while thicknesses of aluminum oxide layers are mostly in the range of 10- 2- 1 ⁇ m.
  • Such inorganic or organic substances are used as charge-generating compounds, as have been known for this purpose.
  • This subheading includes dyes or amorphous selenium.
  • the dyes used or inorganic substances to be mixed, e.g. Tellurium particularly determine the spectral sensitivity of the photoconductive layer.
  • the application of a homogeneous, densely packed dye layer as a charge carrier-generating layer is known and is obtained by evaporating the dye onto the carrier in vacuo.
  • the dyes can be evaporated without decomposition under relatively favorable conditions of 10- 3 to 10- 5 Torr and 250 to 400 ° C heating temperature.
  • the temperature of the carrier is below 50 ° C.
  • the production of the layer generating the charge carrier in a uniform thickness can also be achieved by other coating techniques, such as, for example, by mechanically rubbing the finely powdered dye into the electrically conductive layer support, by chemical deposition of a leuco base to be oxidized, by electrolytic or electrochemical processes , by gun spray technique or by applying from a solution and drying the same.
  • other coating techniques such as, for example, by mechanically rubbing the finely powdered dye into the electrically conductive layer support, by chemical deposition of a leuco base to be oxidized, by electrolytic or electrochemical processes , by gun spray technique or by applying from a solution and drying the same.
  • thin layers of inorganic substances which generate charge carriers and are produced by vapor deposition of selenium, doped selenium, cadmium sulfide etc. are also suitable.
  • Charge-transporting compounds are used in the photoconductive layer. These are primarily organic compounds that have an extensive n-electron system. Both monomeric and polymeric aromatic carbocyclic and heterocyclic compounds belong here.
  • Monomers which have at least one dialkylamino group are used in particular.
  • Heterocyclic compounds such as oxdiazole derivatives according to DE-B-10 58 836, in particular 2,5-bis- (4'-diethylaminophenyl) -oxdiazole-1,3,4, have proven particularly useful.
  • Suitable monomers are, for example, triphenylamine derivatives, more highly condensed aromatic carbocyclic compounds such as pyrene, benzo-condensed heterocycles, and also pyrazoline or imidazole derivatives according to DE-C-10 60 714 and DE-C-11 06 599; this subheading also includes triazole, thiadiazole and oxazole derivatives, as are known from German patents 10 60 260, 12 99 296, 11 20 875.
  • the charge transport layer has practically no photosensitivity in the visible range of approximately 420-750 nm. It preferably consists of a mixture of an electron donor compound with a resin binder if the recording material is to be negatively charged. It is preferably transparent.
  • the added binder influences both the mechanical behavior, such as abrasion, flexibility, film formation, etc., and the electrophotographic properties, such as photosensitivity, residual charge, etc.
  • film-forming compounds such as polyester resins, polyvinyl chloride / polyvinyl acetate copolymers, styrene-maleic anhydride copolymers, silicone resins, reactive resins, DD lacquers, polycarbonates and acrylates or methacrylates etc., can be used.
  • Copying arrangements which mechanically stress the tape material during the run require a greater elasticity from the photoconductive layer, which can be achieved in particular by using highly viscous cellulose acyl esters.
  • cellulose acyl esters are those which are available in different viscosity grades and with different substitutions.
  • Cellulose acyl esters with an acetyl content of at most 15% and a viscosity of about 50 poises are particularly suitable.
  • cellulose acyl esters with higher viscosities, up to 200 and more poises can be used according to the invention.
  • the Ubbelohde method is also used to determine the viscosity. According to this "Ubbelohde viscometer method", solutions of 5 parts by weight of cellulose acyl ester and 95 parts by weight of tetrahydrofuran with correspondingly used capillaries in the range 1-111 at 25 ° C. (according to DIN 51 562) have at least a viscosity of 20 cSt.
  • Electrophotographic recording material with these cellulose products as binders gives films with high elasticity.
  • the cellulose acyl esters differ above all with regard to their acyl radical. It has been found that with an increasing content of butyryl groups, in exchange for the acetyl groups, the photoconductor arrangement can be adjusted to be more light-sensitive. It has therefore proven to be particularly advantageous according to the invention to use cellulose acetobutyrates with at most 15 acetyl and e.g. use at least 15% butyryl content at high viscosity. This subheading also includes cellulose propionates with a high propionyl content or cellulose acetobutyrates with a large butyryl content. Mixtures of cellulose acetyl esters can also be used.
  • the mixing ratio of the charge transporting compound to the binder can vary. However, due to the requirement for maximum photosensitivity, ie the greatest possible proportion of charge-transporting compound and for crystallization to be avoided the same as well as increasing the flexibility, ie the largest possible proportion of cellulose acyl ester, set relatively certain limits.
  • the preferred content of cellulose acyl ester for charge-transporting compound is in the range of 20 to 60 parts by weight to 80 to 40 parts by weight. Too large a proportion of monomers adversely affects flexibility, so that in particularly preferred, flexible embodiments the ratio of cellulose acyl ester to charge-transporting compound is approximately 50:50 parts by weight.
  • the cellulose acyl ester content is in the range below 50%.
  • the charge transport layers with monomers such as 2,5-bis (4'-diethylaminophenyl) oxdiazole-1,3,4 are amorphous according to X-ray goniometer measurements.
  • the layer thickness of the photoconductive layer is in a range which corresponds to a layer weight of approximately 5 to 50 g / m 2 .
  • layer thicknesses in the range from 0.005 to 2 ⁇ m, preferably 0.005 and 1 ⁇ m or in the range from 2 to 20 ⁇ m, preferably 3 to 10 ⁇ m are suitable. If the charge-generating layer is in dispersion, layer thicknesses in the range of preferably 0.1-1 ⁇ m are suitable.
  • the specified limits can be extended upwards or downwards on a case-by-case basis.
  • Leveling agents such as silicone oils, wetting agents,. in particular nonionic substances, plasticizers of different compositions such as those based on chlorinated hydrocarbons or based on phthalic esters. If necessary, sensitizers and / or acceptors can also be added to the charge transport layer, but only to the extent that the optical transparency of the charge transport layer is not significantly impaired.
  • the pigment dye N, N'-dimethyl-perylene-3,4,9,10-tetracarboxylic acid diimide is placed on an aluminum-vapor-coated polyester film 75 ⁇ m thick in a vacuum evaporation system at 10 -4 ⁇ 10 -5 Torr within 2 minutes at approx. 280 ° C evaporated.
  • the distance between the evaporator source and the substrate is about 20 cm.
  • the homogeneously evaporated dye layer has a layer weight in the range of 100-200 mg / m 2 . This completely covers the electrically conductive substrate.
  • the respective layer thickness is 9-10 ⁇ m.
  • the photosensitivity of the photoconductive double layers produced is carried out as follows:
  • the test sample moves on a rotating plate through a charging device to the exposure station, where it is continuously exposed to an XBO 150 xenon lamp from Osram.
  • An XBO 150 xenon lamp from Osram A heat absorption glass KG 3 from Schott & Gen., Mainz, and a neutral filter with 15% transparency are connected upstream of the lamp.
  • the light intensity in the measuring plane is in the range of 70-170 ⁇ W / cm 2 ; it is measured immediately after the light decay curve has been determined using an Opto-Meter Model -80 X (United Detector Technology, Inc.).
  • the charge level (U o ) and the photo-induced light decay curve are recorded oscillographically using a 610 CR electrometer from Keithley Instruments, USA, using a transparent probe.
  • the photoconductor layer is characterized by the charge level in volts (U o ) and the time (T 1/2) after which half the charge (U o / 2) has been reached.
  • the product of T 1/2 and the measured light intensity I [ ⁇ W / cm 2 ] is the half-value energy E 1/2 [ ⁇ J / cm 2 ].
  • the photosensitivity of the three double layers is determined to
  • the residual charge in volts (U R ) after 0.1 seconds, determined from the above bright discharge curves, is another measure of the discharge.
  • dye layers are produced on aluminum-vaporized polyester films and layers of various cellulose acetobutyrates in a weight ratio of 1: 1 are applied together with 2,5-bis- (4'-diethylaminophenyl) -oxdiazole-1,3,4.
  • Example 2 The manufacturing and measuring conditions are analogous to Example 1; the layer thickness of the spun on top layers is approximately 7 pm:
  • a charge transport layer is applied over it, which consists of equal parts by weight of 2,5-bis (4'-diethylaminophenyl) oxdiazole-1,3,4 and the respective cellulose acetobutyrate.
  • the layers applied from tetrahydrofuran solutions have layer weights in the range of 7-9 g / m 2 .
  • the flexible photoconductor loop is run 5000 times with a constant speed of rotation over roller diameters of 12, 18 or 25 mm with a constant speed and over a rubber drive roller of approximately 80 mm in diameter.
  • the recording material is exposed to an increased bending stress, so that hairline cracks can occur on the surface of the photoconductor layer under this stress. This formation of hairline cracks is advantageously observed in the dark under oblique angles.
  • a charge transport layer composition comprising 50 parts by weight of charge-transporting compound, 25 parts by weight of polyester resin and 25 parts by weight of vinyl chloride / vinyl acetate copolymer is applied in a layer thickness of 9-10 g / m 2 to a dye layer in accordance with Example 1 and subjected to the bending stress test. Thereafter, at 25 mm roller diameter and 5,000 revolutions, none at all in the photoconductive layer on polyester film 75 ⁇ m thick, on the 125 ⁇ m thick short hairline cracks and on the 190 ⁇ m thick polyester film very strong and long hairline cracks. In addition, occasional hairline cracks occur with a roller diameter of 18 mm and a carrier thickness of 75 ⁇ m.
  • the batch was first adjusted to a 25% concentration and the pigment dye in the highly viscous solution was intensively ground for 2 hours. This solution was then diluted to the spread above.
  • the pigment dispersion layer is then applied in accordance with the arrangement in FIG. 1 to an aluminum foil of 100 ⁇ m thickness homogeneously with a layer thickness of approximately 5 ⁇ m.
  • the measurement is carried out analogously to the conditions given in example 1 (light intensity approx. 100 ⁇ W / cm 2 , xenon light XBO 150):
  • a batch of equal parts by weight of a cellulose acetobutyrate with an acetyl content of 13.5% and a condensation product from the reaction of perylene-3,4,9,1 0-tetracarboxylic anhydride and o-phenylenediamine in tetrahydrofuran is intensively ground in a ball mill for about 2 hours . After the highly viscous solution had been dispersed, the solution was diluted four times and the coating solution was coated homogeneously on aluminum-vaporized 75 ⁇ m thick polyester film.
  • the layer coating of the pigment precoat after drying is 530 mg / m 2 ; a charge transport layer consisting of equal parts by weight of 2,5-bis- (4'-diethylaminophenyl) -oxdiazole-1,3,4 and cellulose acetobutyrate with an acetyl content of 5% is layered uniformly thereon (layer thickness approx. 7 ⁇ m; arrangement according to FIG. 4) .
  • the photosensitivity is determined analogously to Example 1 (light intensity 90 ⁇ W / cm 2 ; Xenon XBO 150) and gives a negative charge of 330 V:
  • a condensation product of 3-bromopyrene and formaldehyde according to DT-A - 21 37 288 is used as a polymeric charge transport compound.
  • a perinone dye layer, CI 71 105, according to DT-A-22 39 923, in an amount of 90 mg / m 2 is evaporated onto an aluminum-vapor-coated 75 ⁇ m thick polyester film and a tetrahydrofuran solution of 70 parts by weight the condensation product together with 30 parts by weight of a cellulose acetobutyrate with 5% acetyl groups, which has a viscosity of 20 poises, applied in a layer about 5 ⁇ m thick after drying.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Claims (10)

1. Matériel d'enregistrement électrophotographique comprenant un support de couche électriquement conducteur, éventuellement une couche isolante intermédiaire et une couche photoconductrice contenant un composé créateur de porteurs de charge et un composé transporteur de charges, des liants et des additifs habituels, caractérisé en ce que le matériel d'enregistrement contient en tant que liant un ester acylé de cellulose ayant une teneur en acétyle égale ou inférieure à 30% et une viscosité supérieure à 15 poise, mesurée selon la norme ASTM D 817-65, formules A et D 1343-56.
2. Matériel d'enregistrement électrophotographique comprenant un support de couche électriquement conducteur, éventuellement une couche isolante intermédiaire et une couche photoconductrice formée par une couche contenant un composé créateur de porteurs de charge et éventuellement un liant, et par une couche contenant un composé transporteur de charges, des liants et des additifs habituels, caractérisé en ce que le matériel d'enregistrement contient comme liant un ester acylé de cellulose ayant une teneur en acétyle égale ou inférieure à 30% et une viscosité supérieure à 15 poise, mesurée selon la norme ASTM D 817-65, formules A et D 1343-56.
3. Matériel d-enregistrement selon les revendications 1 et 2 caractérisé en ce que l'ester acylé de cellulose présente une teneur en acétyle égale ou inférieure à 15%.
4. Matériel d'enregistrement selon la revendication 3, caractérisé en ce que l'ester acylé de cellulose présente une viscosité supérieure à 50 poise.
5. Matériel d'enregistrement selon les revendications 1 à 4, caractérisé en ce que l'ester acylé de cellulose renferme des groupes acyle ayant de 2 à 4 atomes de carbone.
6. Matériel d'enregistrement selon les revendications 1 à 5 caractérisé en ce que l'ester acylé de cellulose est de l'acétobutyrate de cellulose dont la teneur en butyryle n'est pas inférieure à 1.5%.
7. Matériel d'enregistrement selon les revendications 3 à 6 caractérisé en ce que l'esteracylé de cellulose présente une viscosité comprise entre 60 et 110 poise.
8. Matériel d'enregistrement selon les revendications 1 à 7 caractérisé en ce que le rapport entre l'ester acylé de cellulose et le composé transporteur de charges est compris dans la fourchette de 20 à 60 parties en poids du premier pour 80 à 40 parties en poids du second.
9. Matériel d'enregistrement selon les revendications 1 à 8 comprenant - en fonction de la succession des couches - un support de couche èlectriquement conducteur en feuille de polyester recouverte d'aluminium vaporisé d'une épaisseur comprise entre 75 etw 250 µrn, une couche d'un composé créateur de porteurs de charge d'une épaisseur comprise entre 0,005 et 2 µm et une couche d'une épaisseur comprise entre 2 et 20 µm formée de 40 à 60 parties en poids d'un composé organique monomère transporteur de charges et de 60 à 40 parties en poids d'ester acylé de cellulose.
10. Matériel d'enregistrement selon la revendication 2, caractérisé en ce que la couche contenant le composé créateur de charges contient comme liant un ester acylé de cellulose.
EP78100506A 1977-07-29 1978-07-26 Matériau d'enregistrement électrophotographique Expired EP0000581B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2734289 1977-07-29
DE2734289A DE2734289C2 (de) 1977-07-29 1977-07-29 Photoleiterband

Publications (3)

Publication Number Publication Date
EP0000581A2 EP0000581A2 (fr) 1979-02-07
EP0000581A3 EP0000581A3 (en) 1979-02-21
EP0000581B1 true EP0000581B1 (fr) 1981-06-17

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EP78100506A Expired EP0000581B1 (fr) 1977-07-29 1978-07-26 Matériau d'enregistrement électrophotographique

Country Status (5)

Country Link
US (1) US4224395A (fr)
EP (1) EP0000581B1 (fr)
JP (1) JPS5426742A (fr)
AU (1) AU519787B2 (fr)
DE (2) DE2734289C2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4584253A (en) * 1984-12-24 1986-04-22 Xerox Corporation Electrophotographic imaging system
FR2688293B1 (fr) * 1992-03-09 1994-06-03 Enthalpy Sa Capitonnage isolant modulaire pour enceinte fermee.
JP4032353B2 (ja) * 2003-12-26 2008-01-16 セイコーエプソン株式会社 回路基板の製造方法、回路基板、電子機器、および電気光学装置
JP5718791B2 (ja) * 2011-11-08 2015-05-13 富士フイルム株式会社 電子写真感光体およびこれを用いた複写機、その感光層形成用ドープ

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2327808A (en) * 1941-08-08 1943-08-24 Eastman Kodak Co Photographic emulsion for spraying upon surfaces and its application
US2748022A (en) * 1952-08-08 1956-05-29 Eastman Kodak Co Cellulose ester photographic emulsions
US3155503A (en) * 1959-02-26 1964-11-03 Gevaert Photo Prod Nv Electrophotographic material
DE1278242B (de) * 1961-12-30 1968-09-19 Gevaert Photo Prod Nv Elektrophotographisches Aufzeichnungsmaterial
BE617032A (fr) * 1961-04-29
US3146688A (en) * 1961-05-01 1964-09-01 Xerox Corp Xerographic machine
US3331687A (en) * 1962-09-24 1967-07-18 Render Belipa G M B H Fa Electrophotographic material
US3652268A (en) * 1970-03-16 1972-03-28 Dick Co Ab Barrier coated electrophotographic sheet suitable for liquid development
BE763389A (fr) * 1971-02-24 1971-08-24 Xerox Corp Nouvelle plaque xerographique contenant des pigments photoinjecteurs dequinones polynucleaires,
CH564797A5 (en) * 1971-11-16 1975-07-31 Gen Co Ltd Electrostatic recording carrier - for writing or printing
DE2242595C2 (de) * 1972-08-30 1982-06-09 Hoechst Ag, 6000 Frankfurt Elektrophotographisches Aufzeichnungsmaterial

Also Published As

Publication number Publication date
AU3772378A (en) 1980-01-10
EP0000581A2 (fr) 1979-02-07
EP0000581A3 (en) 1979-02-21
AU519787B2 (en) 1981-12-24
DE2734289A1 (de) 1979-02-01
JPH0139097B2 (fr) 1989-08-18
DE2860771D1 (en) 1981-09-24
JPS5426742A (en) 1979-02-28
DE2734289C2 (de) 1982-06-09
US4224395A (en) 1980-09-23

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