CN103792802A - Single-layer electronic photoreceptor and image forming apparatus - Google Patents
Single-layer electronic photoreceptor and image forming apparatus Download PDFInfo
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- CN103792802A CN103792802A CN201310470646.1A CN201310470646A CN103792802A CN 103792802 A CN103792802 A CN 103792802A CN 201310470646 A CN201310470646 A CN 201310470646A CN 103792802 A CN103792802 A CN 103792802A
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Abstract
The invention relates to a single-layer electronic photoreceptor and an image forming apparatus. The single-layer electronic photoreceptor comprises at least charge generating material, electron conveying material, hole conveying material, and a photosensitive layer of binder resin in one layer on a conductive substrate. The film thickness of the photosensitive layer is between 10 to 40 [mu]m. The charge generating material comprises Titanium oxide phthalocyanine material. With respect to 100 parts by weight of binder resin, the photosensitive layer comprises 50 to 120 parts by weight of hole conveying material and 55 to 90 parts by weight of electron conveying material. The binder resin comprises specific repetitive unit 15 to 60 by mass of polycarbonate resin. According to the invention, a photoreceptor high in light sensitivity and difficult to generate storage and black spots is provided. In addition, the image forming apparatus may continuously provide good images because of using such photoreceptor as an image carrier.
Description
Technical field
The present invention relates to mono-layer electronic photographic photoreceptor and possess the image processing system of single-layer type photoreceptor.
Background technology
In recent years, duplicating machine, printer all develop to colour from black and white, advance miniaturization, the high speed of fuselage, and therefore the ISO corresponding with high speed processing is indispensable.
Current, as the electric charge generating material of individual layer photoreceptor, the quantum yield of TiOPc pigment is high, is the electric charge generating material very useful for the ISO of Electrophtography photosensor.But, TiOPc pigment when the electric charge generating material, because exposure portion is poor large with the light sensitivity of non-exposure portion, is caused storing (メ モ リ ー) and is easy to residually, particularly there is the residual problem of transfer printing storage (translocation is write メ モ リ ー).
Further, the Electrophtography photosensor that is suitable for TiOPc pigment be easy to occur black color dots on so-called image (Shang portrait ?point) stain (?Port チ).And then, when high speed processing, because the film amount of cutting (film is cut れ amount) of the photographic layer of Electrophtography photosensor becomes large, therefore there is the problem that is easy to occur stain.
As the transfer printing store methods of photoreceptor, it is also conceivable that the charge transport material increasing in photographic layer, the particularly content of electron transport materials, but the method is because the resin ratio in photographic layer tails off, and therefore the film amount of the cutting increase of photographic layer is easier to occur stain.
In order to suppress the generation of this stain, mainly carried out the research (patent documentation 1～3) to being arranged on the particle adding in the middle layer between photographic layer and supporter in the past.
But said method is used as TiOPc pigment in the high speed processing of mono-layer electronic photographic photoreceptor of electric charge generating material in use, the generation that suppresses memory phenomenon and stain is all insufficient.
Summary of the invention
Because above-mentioned situation, the object of the present invention is to provide one to be used in high speed processing and also can suppress exposure storage, can obtain the mono-layer electronic photographic photoreceptor of good image and use the image processing system of this mono-layer electronic photographic photoreceptor.
To contain TiOPc pigment be in the mono-layer electronic photographic photoreceptor of photographic layer of 10～40 μ m as the thickness of electric charge generating material possessing in the discoveries such as the inventor, with respect to binding resin 100 mass parts, contain respectively hole transporting material and the electron transport materials of specified quantitative, and then, when binding resin comprises the polycarbonate resin that contains specific repetitive, can suppress the generation of exposure storage and stain, so that complete the present invention.Particularly, the invention provides following photoreceptor.
A mono-layer electronic photographic photoreceptor that scheme is related of the present invention, it is characterized in that, on conductive base, possess and in same layer, at least comprise electric charge generating material, electron transport materials, the photographic layer of hole transporting material and binding resin, the thickness of described photographic layer is 10～40 μ m, described electric charge generating material comprises TiOPc pigment, with respect to binding resin 100 mass parts, contain respectively hole transporting material 50～120 mass parts, electron transport materials 55～90 mass parts, binding resin is polycarbonate resin, with respect to the quality of polycarbonate resin, contain repetitive 15～60 quality % that represented by following formula (1).
Find by this structure, can obtaining suppressing exposure storage and the generation of stain also can provide the mono-layer electronic photographic photoreceptor of good image.
[Chemical formula 1]
[in formula (1), R
1and R
2independent respectively, the alkyl of expression hydrogen atom or carbon number 1～3.]
In addition, the image processing system that another program of the present invention is related, possesses: image carrier; Electro-mechanical part, for making the surface charging of described image carrier; Exposure portion for making the face exposure of charged described image carrier, thereby forms electrostatic latent image on the surface of described image carrier; Development section, for being toner image by described latent electrostatic image developing; And transfer section, for by described toner image from described image carrier to transfer printing body transfer printing, described image carrier is above-mentioned mono-layer electronic photographic photoreceptor.
Find according to this structure, can obtain carrying the stable image processing system of the Electrophtography photosensor of the generation that can suppress exposure storage and stain.
The explanation of the embodiment by following explanation, other objects of the present invention, the concrete advantage obtaining by the present invention are clearer and more definite.
Accompanying drawing explanation
Fig. 1 is the figure that represents the structure of single-layer type photoreceptor.
Fig. 2 is the schematic diagram that represents the structure of an example of image processing system of the present invention.
Fig. 3 is the schematic diagram of memory image evaluation original copy.
Embodiment
Below, embodiments of the present invention are described, but the present invention is not limited to these.
[the first embodiment]
The related Electrophtography photosensor of the first embodiment of the present invention at least comprises electric charge generating material, electron transport materials, hole transporting material and binding resin for possessing on conductive base in same layer, and thickness is the mono-layer electronic photographic photoreceptor of the photographic layer of 10～40 μ m.In the related mono-layer electronic photographic photoreceptor of the first embodiment, electric charge generating material comprises TiOPc pigment.In addition, the hole transporting material in photographic layer and the content of electron transport materials, with respect to binding resin 100 mass parts, are respectively 50～120 mass parts, 55～90 mass parts.And then photographic layer comprises that the polycarbonate resin that contains repetitive 15～60 quality % that represented by following formula (1) is as binding resin.
[Chemical formula 2]
Below, the related mono-layer electronic photographic photoreceptor of the first embodiment is described in detail.As shown in Fig. 1 (a), mono-layer electronic photographic photoreceptor 20 possesses photographic layer supporter 11; And the photographic layer 21 of the photosensitive layer coating liquid that use contains specific solvent on photographic layer supporter 11 individual layer that form, that contain electric charge generating material, charge transport material and binding resin.Here, as long as mono-layer electronic photographic photoreceptor 20 possesses photographic layer supporter 11 and photographic layer 21, be not particularly limited.Particularly, for example, on photographic layer supporter 11, can directly possess photographic layer 21, also can be as shown in (b) of Fig. 1, mono-layer electronic photographic photoreceptor 20 ' possesses middle layer 14 between photographic layer supporter 11 and photographic layer 21.In addition, photographic layer 21 can be used as outermost layer and exposes, and also can on photographic layer 21, possess protective seam (not shown).
In the present invention, in above-mentioned photographic layer 21 with the so-called charge transport material (CTM) that contains hole transporting material (HTM) and electron transport materials (ETM) together with TiOPc pigment shown below.
(TiOPc pigment)
In the present invention, as electric charge generating material (CGM), the TiOPc pigment using as long as serving as the electric charge generating material of mono-layer electronic photographic photoreceptor, is not particularly limited for crystal formation, can use various crystal formations.Particularly, can enumerate α type TiOPc (α-TiOPc), β type TiOPc (β-TiOPc), Y type TiOPc (y-TiOPc) etc.
And then, preferably use and there is following characteristic (A) and titanyl phthalocyanin crystal (B).
(A), in CuK α characteristic X-ray diffraction spectrum, Bragg angle 2 θ ± 0.2 °=27.2 ° have main peak, and do not have peak at 26.2 °.
(B), in differential scanning calorimetric analysis, except being accompanied by the peak of gasification of planar water, in the scope of 270～400 ℃, there is a peak.
Its reason is the titanyl phthalocyanin crystal by use with the characteristic of afore mentioned rules, thereby can significantly improve the formation efficiency of the electrostatic latent image that brings of exposure.That is, titanyl phthalocyanin crystal is by having characteristic (A), thereby can significantly improve its electric charge generating ability.In addition, titanyl phthalocyanin crystal is by having characteristic (B), thereby can further improve its crystalline stability, electric charge generating ability and dispersiveness.
In addition,, as the peak being accompanied by beyond the peak of gasification of planar water, the peak occurring in the scope of 270～400 ℃ preferably occurs in the scope of 290～400 ℃, more preferably in the scope of 300～400 ℃, occurs.
In addition, in order to obtain thering is above-mentioned characteristic (A) and titanyl phthalocyanin crystal (B), in the time of synthetic phthalocyanine oxygen titanium compound, preferably, with respect to 1 mole of the phthalonitrile or derivatives thereof as other materials material or 1,3-diiminoisoindole or derivatives thereof, using the value being made as the addition of the titanium alkoxide such as four titanium butoxide of material substance or titanium tetrachloride in the scope of 0.40～0.53 mole, more preferably, be made as the value in the scope of 0.42～0.50 mole.
And then, preferably, under the existence of urea compounds, carry out the synthetic of above-mentioned TiOPc compound, now, more preferably, with respect to phthalonitrile or derivatives thereof or 1,1 mole of 3-diiminoisoindole or derivatives thereof, the addition of urea compounds is made as to the value in the scope of 0.1～0.95 mole, more preferably, is made as the value in the scope of 0.2～0.8 mole.
(hole transporting material)
As hole transporting material, as long as the material that can use as the hole transporting material being included in the photographic layer of mono-layer electronic photographic photoreceptor, be not particularly limited.As the concrete example of hole transporting material, can enumerate benzidine derivative, 2, 5-bis-(4-methylamino phenyl)-1, 3, the oxadiazole based compounds such as 4-oxadiazole, 9-(4-diethylamino styryl) the polystyrene compound such as anthracene, the carbazole based compounds such as Polyvinyl carbazole, organopolysilane compound, the p-dimethylaminophenyl of 1-phenyl-3-() the pyrazoline based compound such as pyrazoline, hydrazone based compound, triphenylamine based compound, indoles based compound, oxazole based compound, isoxazole based compound, thiazole compound, the nitrogenous ring compounds such as three azole compounds, fused-polycyclic compounds etc.Among these hole transporting materials, more preferably in molecule, there is the triphenylamine based compound of one or more triphenylamine skeletons.These hole transporting materials can use separately one or combine two or more uses.
(electron transport materials)
As electron transport materials, as long as the material that can use as the electron transport materials being included in the photographic layer of mono-layer electronic photographic photoreceptor, be not particularly limited.Particularly, for example can enumerate quinone derivative, malononitrile derivant, sulfo-pyran derivate, the trinitro-thioxanthone derivates, 3 such as naphthoquinone derivatives, diphenoquinone, anthraquinone derivative, azo quinone derivative, nitroanthraquinone derivant, dinitroanthraquinone derivant, 4,5,7-tetranitro-9-Fluorenone derivant, dinitro anthracene derivant, dinitro acridine derivatives, tetracyanoethylene, 2,4,8-trinitro-thioxanthones, dinitro benzene, dinitro anthracene, dinitro acridine, succinic anhydride, maleic anhydride, dibromomaleic acid acid anhydride etc.Electron transport materials can use separately one or combine two or more uses.
(binding resin)
Binding resin used in the present invention is polycarbonate resin, at least comprises the material that contains repetitive 15～60 quality % that represented by following formula (1) with respect to the quality of polycarbonate resin.
[chemical formula 3]
[in formula (1), R
1and R
2independent respectively, the alkyl of expression hydrogen atom or carbon number 1～3.]
When polycarbonate resin has the repetitive being represented by above-mentioned formula (1), be easy to disperse well charge transport material in binding resin.Therefore, while using this binding resin, even if increase the amount of charge transport material, be also easy to manufacture excellent in wear resistance, can suppress the Electrophtography photosensor of the generation that forms the stain in image.The polycarbonate resin being included in binding resin is particularly preferably the quality with respect to polycarbonate resin, contains repetitive 40～60 quality % that represented by above-mentioned formula (1).
Polycarbonate resin preferably, on the basis of the repetitive being represented by above-mentioned formula (1), contains the repetitive being represented by following formula (2).In this case, be easy to further suppress the generation of the stain in formation image.
[chemical formula 4]
[in formula (2), R
3and R
4independent respectively, the alkyl of expression hydrogen atom or carbon number 1～3.]
The manufacture method of above-mentioned polycarbonate resin is not particularly limited.For example, can use and general formula (1) and the corresponding bisphenol compound with the repetitive that is documented in formula (2) etc. as required, manufacture according to the manufacture method of known polycarbonate resin.When polycarbonate resin is multipolymer, polycarbonate resin only otherwise hinder object of the present invention, can be any in random copolymers and segmented copolymer.
The viscosity average molecular weigh of binding resin is preferably more than 25000.By the viscosity average molecular weigh of binding resin is made as to above-mentioned scope, thereby binding resin becomes appropriate hardness, even if it is also excellent to increase the amount mar proof of charge transport material, can suppress to form the generation of the stain in image.In addition, from the deliquescent viewpoint organic solvent, its viscosity average molecular weigh is preferably below 55000.
Binding resin is as required damaging in the scope of effect of the present invention, also can comprise the resin beyond the polycarbonate resin that comprises the repetitive being represented by above-mentioned formula (1).As the resin comprising beyond the polycarbonate resin of repetitive being represented by above-mentioned formula (1), as long as the material that can use as being included in the binding resin in the photographic layer of mono-layer electronic photographic photoreceptor, be not particularly limited.As concrete example, can enumerate the polycarbonate resin that does not comprise the repetitive being represented by above-mentioned formula (1), phenylethylene resin series, Styrene-Butadiene, styrene-acrylonitrile copolymer, styrene-maleic acid copolymer, styrene-propene acid copolymer, acrylic copolymer, polyvinyl resin, vinyl-vinyl acetate copolymer, chlorinated polyethylene resin, Corvic, acrylic resin, ionomer, vinyl chloride vinyl acetate copolymer, alkyd resin, polyamide, urethane resin, polyarylate resin, polysulfone resin, diallyl phthalate ester resin, ketone resin, polyvinyl butyral resin, polyether resin, the thermoplastic resins such as vibrin, the thermoset resin of silicone resin, epoxy resin, phenolics, carbamide resin, melamine resin and other bridging property thermoset resins etc., the light-cured type resins such as Epocryl, polyurethane acrylic emulsion copolymerization resin.These resins also can combine two or more use.
The content of polycarbonate resin in binding resin, that comprise the repetitive being represented by above-mentioned formula (1) in the scope that does not hinder object of the present invention without particular limitation of.Typical case, more than content in binding resin, that comprise the polycarbonate resin of the repetitive being represented by above-mentioned formula (1) is preferably 60 quality %, more preferably more than 80 quality %.
(adjuvant)
The photographic layer of mono-layer electronic photographic photoreceptor also can, bringing in dysgenic scope to electrofax characteristic, except electric charge generating material, hole transporting material, electron transport materials and binding resin, also comprise various adjuvants.As the adjuvant that can be engaged in photographic layer, for example, can enumerate anti-deterioration agent, softening agent, plastifier, polycyclc aromatic compound, surface modifier, extender, tackifier, dispersion stabilizer, wax, oil, acceptor, donor, surfactant and the homogenize agent etc. such as antioxidant, radical scavenger, singlet quencher (singlet quencher), ultraviolet light absorber.
(manufacture method of mono-layer electronic photographic photoreceptor)
The manufacture method of mono-layer electronic photographic photoreceptor in the scope that does not hinder object of the present invention without particular limitation of.As the preferred example of the manufacture method of mono-layer electronic photographic photoreceptor, can enumerate that the coating fluid that photographic layer is used is coated on photographic layer supporter and the method that forms photographic layer.Particularly, can be by dissolving in solvent or be dispersed with electric charge generating material, charge transport material, binding resin and also dissolve as required or the coating fluid that is dispersed with various adjuvants etc. is coated on photographic layer supporter, and be dried and manufacture.Coating process is not particularly limited, for example, can enumerate the method that uses rotary coating machine, applicator, flush coater, metering bar coater, dip coater, doctor etc.Among these coating processes, owing to can producing continuously and economy excellence, be therefore preferably the infusion process that uses dip coater.In addition, as the drying means that is formed on the film on photographic layer supporter, for example, can enumerate under the condition of 80～150 ℃ and 15～120 minutes and carry out method of heated-air drying etc.
In the related mono-layer electronic photographic photoreceptor of the first embodiment, each content of electric charge generating material (CGM), hole transporting material (HTM), electron transport materials (ETM) and binding resin in photographic layer is suitably selected, and is not particularly limited.Particularly, for example content of electric charge generating material, with respect to binding resin 100 mass parts, is preferably 0.1～50 mass parts, more preferably 0.5～10 mass parts.The content of electron transport materials, with respect to binding resin 100 mass parts, is preferably 55～90 mass parts, more preferably 60～80 mass parts.The content of hole transporting material, with respect to binding resin 100 mass parts, is preferably 50～120 mass parts, more preferably 60～100 mass parts.In addition, the total amount of hole transporting material and electron transport materials, the i.e. content of charge transport material, with respect to binding resin 100 mass parts, be preferably 105～150 mass parts, more preferably 110～140 mass parts.
Above-mentioned charge transport material and they and the discontented lower limit of content time cannot suppress the generation of stain, while exceeding higher limit on the contrary, photographic layer causes that the crystallization of charge transport material the electrical characteristics to photoreceptor impact while formation.
As the solvent containing in the coating fluid of using at photographic layer, as long as can make the each composition that forms photographic layer dissolve or disperse, be not particularly limited.Particularly, can enumerate the alcohols such as methyl alcohol, ethanol, isopropyl alcohol, butanols; The fatty family hydrocarbon such as normal hexane, octane, cyclohexane; The aromatic hydrocarbons such as benzene,toluene,xylene; The halogenated hydrocarbons such as methylene chloride, ethylene dichloride, phenixin, chlorobenzene; The ethers such as dimethyl ether, diethyl ether, tetrahydrofuran, glycol dimethyl ether, diethylene glycol dimethyl ether; The ketones such as acetone, butanone, methyl isobutyl ketone, cyclohexanone; The ester such as ethyl acetate, methyl acetate class; The non-proton property polar organic solvents such as dimethylformaldehyde, dimethyl formamide, dimethyl sulfoxide.These solvents can use separately one or combine two or more uses.
The thickness of photographic layer of the present invention is preferably 10～50 μ m, more preferably 10～40 μ m.
[the second embodiment]
The second embodiment of the present invention relates to image processing system, and this image processing system possesses: image carrier; Be used for the electro-mechanical part of the surface charging that makes image carrier; For making the face exposure of charged image carrier, thereby on the surface of image carrier, form the exposure portion of electrostatic latent image; For the development section that is toner image by latent electrostatic image developing; And for toner image is transferred to the transfer section of transfer printing body from image carrier, image carrier is the related mono-layer electronic photographic photoreceptor of the first embodiment.The related image processing system of the second embodiment is owing to possessing above-mentioned structure, even image processing system does not have the apparatus structure that is easy to like this occur exposure storage and stain except electric unit and scraper plate cleaning unit, also can suppress the generation of exposure storage and stain.
Form any one in device, color image forming device as the related image processing system of the second embodiment applicable to monochrome image, be preferably the color image forming device of the series system that uses multi-color toner here.More specifically, can enumerate the color image forming device of the series system of described as described below use multi-color toner.Here, the color image forming device of series system is described.
Possesses the image processing system of the related mono-layer electronic photographic photoreceptor of present embodiment, possess: multiple image carriers, the toner image forming in order to form different respectively versicolor toners on each surface is set up in parallel in prescribed direction; And multiple development sections, the plurality of development section possesses with each image carrier arranged opposite, carry and transport toner from the teeth outwards and the toner transporting is supplied to respectively to the surperficial developer roll of each image carrier, uses respectively mono-layer electronic photographic photoreceptor as each image carrier.
Fig. 2 is the schematic diagram that represents the structure of the image processing system that possesses the related mono-layer electronic photographic photoreceptor of embodiments of the present invention.Here, as image processing system, describe as an example of color printer 1 example.
As shown in Figure 2, this color printer 1 has the equipment body 1a of box.In this equipment body 1a, be provided with supply with paper P sheet feed section 2, transport the paper P supplying with from this sheet feed section 2 and the toner image developing in non-magnetic mono-component mode based on view data etc. be transferred to the image forming part 3 on this paper P and implement on photoreceptor and will be transferred to unfixed toner image photographic fixing on the paper P photographic fixing portion 4 to the photographic fixing processing on paper P at this image forming part 3.Further, on the upper surface of equipment body 1a, be provided with the ADF portion 5 that has implemented the paper P of photographic fixing processing in photographic fixing portion 4 that discharges.
Sheet feed section 2 possesses paper feeding cassette 121, gets paper bowl 122, paper feed roller 123,124,125 and resistance roller 126.Paper feeding cassette 121 is set to insert and takes off in equipment body 1a, for storing the paper P of various sizes.Get the position, upper left side shown in Fig. 2 that paper bowl 122 is arranged on paper feeding cassette 121, for taking out one by one the paper P that is stored in paper feeding cassette 121.Paper feed roller 123,124,125 will pass out to sheet conveying passage by getting the paper P that paper bowl 122 takes out.Resistance roller 126 makes to pass out to after the temporary transient standby of paper P of sheet conveying passage by paper feed roller 123,124,125, is supplied to image forming part 3 with the timing stipulating.
In addition, sheet feed section 2 further possesses the not shown manual pallet of the left surface shown in the Fig. 2 that is arranged on equipment body 1a and gets paper bowl 127.This is got paper bowl 127 and takes out the paper P being placed in manual pallet.Be sent sheet conveying passage by getting the paper P that paper bowl 127 takes out by paper feed roller 123,125, and be fed into image forming part 3 by resistance roller 126 with the timing of regulation.
Image forming part 3 possess image formation unit 7, by this image formation unit 7 its surface (surface of contact) upper by primary transfer based on from the intermediate transfer belt 31 of the toner image of the view data of the transmission such as computing machine and for making toner image secondary transfer printing this intermediate transfer belt 31 to the secondary transfer roller 32 the paper P sending into from paper feeding cassette 121.
Electro-mechanical part 39 makes along the side face of the Electrophtography photosensor 37 of direction of arrow rotation charged equably.As long as electro-mechanical part 39 can make that the side face of Electrophtography photosensor 37 is charged equably to be not specially limited, can be cordless, can be also the way of contact.As the concrete example of electro-mechanical part, can enumerate corona charging device, charged roller, band brush etc., more preferably charged roller, Charging system with ways of contact such as brushes.By using the electro-mechanical part 39 of the way of contact, can suppress the ozone that produced by electro-mechanical part 39 and the discharge of oxides of nitrogen isoreactivity gas, photographic layer deteriorated of the Electrophtography photosensor being caused by active gases can be prevented, and the design of working environment etc. can be considered.
In the electro-mechanical part 39 of charged roller that possesses the way of contact, charged roller makes the side face (surface) of photoreceptor 37 charged under the state contacting with photoreceptor 37.As this charged roller, for example can enumerate under contacting with photoreceptor 37, be subordinated to the rotation of photoreceptor 37 and roller of rotating etc.In addition, as charged roller, for example, can enumerate roller that at least surface element is made up of resin etc.More specifically, for example can enumerate and possess the plug that can be supported by axle rotatably, be formed on the resin bed on plug and plug executed to roller of alive voltage application portion etc.The electro-mechanical part 39 that possesses this charged roller applies voltage by voltage application portion to plug, thereby can make the surface charging via the photoreceptor 37 of resin bed contact.
Preferably, the voltage that is applied to charged roller by voltage application portion is only DC voltage.The DC voltage that is applied to Electrophtography photosensor by charged roller is preferably 1000～2000V, and more preferably 1200～1800V, is particularly preferably 1400～1600V.Be applied to compared with the situation of charged roller by alternating voltage or to the superposeed superimposed voltage of alternating voltage of DC voltage, charged roller is only applied in the situation of DC voltage the tendency that exists the wear extent of photographic layer to reduce.
In addition, can make the side face of photoreceptor 37 charged well as long as form the resin of the resin bed of charged roller, be not particularly limited.As the concrete example of the resin for resin bed, can enumerate silicone resin, urethane resin, silicone modified resin etc.In addition, can also make to contain in resin bed inorganic filling material.
Photographic fixing portion 4 is the part for being transferred to transferred image on paper P at image forming part 3 and implementing photographic fixing processing, possesses the warm-up mill 41 that heats by heating power body and configure and side face the be pressed backer roll 42 of the side face that abut to warm-up mill 41 relative with warm-up mill 41.
And, being transferred to the transferred image on paper P at image forming part 3 by secondary transfer roller 32, the photographic fixing of being undertaken by heating by this paper P by between warm-up mill 41 and backer roll 42 time is processed by photographic fixing to paper P.And, implement the paper P of photographic fixing processing to ADF portion 5 ADFs.In addition, in the color printer 1 of present embodiment, the appropriate location between photographic fixing portion 4 and ADF portion 5 is equipped with transports roller 6.
Color printer 1 forms action by image as above, carries out image formation on paper P.And, in the image processing system of series system as above, owing to possessing the related mono-layer electronic photographic photoreceptor of the first embodiment as image carrier, therefore can suppress the generation of exposure storage and stain.
[embodiment]
Below, by embodiment, the present invention is carried out to more specific description.In addition, the present invention is not implemented example institute and limits.
< photoreceptor is made >
Electric charge generating material, hole transporting material, electron transport materials, polycarbonate resin and content thereof for studying shown in table 1,2.In the time manufacturing photoreceptor, polycarbonate resin 100 mass parts and tetrahydrofuran 800 mass parts of the hole transporting material of content (mass parts) of recording in electric charge generating material 2 mass parts and table 1 and electron transport materials, viscosity average molecular weigh 30000 are joined in bowl mill, carry out mixing in 50 hours, dispersion treatment, prepared the coating fluid that photographic layer is used.Then, the coating fluid obtaining is coated on conductive board by dip coating, removes tetrahydrofuran thereby carry out processing by film for 40 minutes with 100 ℃, obtain the individual layer Electrophtography photosensor of the photographic layer that possesses thickness 30 μ m.
In addition, in table 1, " resin 1 " is polycarbonate resin, " resin 2 " is other resins beyond polycarbonate resin, " containing ratio " of recording in the hurdle of resin 1 is the quality % of the resin 1 of the quality with respect to binding resin, and " ratio " on the hurdle of repetitive (1) is the ratio (quality %) with respect to the quality of the repetitive quality of resin 1, that represented by aforesaid formula (1).
[table 1]
[table 2]
In addition, the mark of the each material shown in table 1,2 and chemical constitution are as follows.
< electric charge generating material (CGM) >
CG1:(A) in CuK α characteristic X-ray diffraction spectrum, Bragg angle 2 θ ± 0.2 °=27.2 ° have maximum peak, and do not there is peak at 26.2 °, (B) in differential scanning calorimetric analysis, except the peak of gasification that is accompanied by planar water is with the crystallization of the TiOPc that has the following chemical formula at a peak in the scope of external 50～270 ℃ and record.
CG2:(A) in CuK α characteristic X-ray diffraction spectrum, Bragg angle 2 θ ± 0.2 °=27.2 ° have maximum peak, and do not there is peak at 26.2 °, (C) in differential scanning calorimetric analysis, except being accompanied by the peak of gasification of planar water, in the scope of 50～400 ℃, do not there is the crystallization of the TiOPc of the following chemical formula record at peak.
CG3:(A) in CuK α characteristic X-ray diffraction spectrum, Bragg angle 2 θ ± 0.2 °=27.2 ° have maximum peak, and do not there is peak at 26.2 °, (D) in differential scanning calorimetric analysis, except being accompanied by the peak of gasification of planar water, the crystallization of the TiOPc of recording at 270 ℃ to the 400 ℃ following chemical formulas with a peak.
CG4: in CuK α characteristic X-ray diffraction spectrum, the crystallization of the TiOPc that Bragg angle 2 θ ± 0.2 ° are at least recorded at 7.6 °, the 28.6 ° following chemical formulas with main diffraction peak.
[chemical formula 5]
< hole transporting material (HTM) >
HT1：
[chemical formula 6]
HT2：
[chemical formula 7]
HT3：
[chemical formula 8]
HT4：
[chemical formula 9]
HT5：
[Chemical formula 1 0]
HT6：
[Chemical formula 1 1]
HT7：
[Chemical formula 1 2]
HT8：
[Chemical formula 1 3]
< electron transport materials (ETM) >
ET1：
[Chemical formula 1 4]
ET2：
[Chemical formula 1 5]
ET3：
[Chemical formula 1 6]
ET4：
[Chemical formula 1 7]
ET5：
[Chemical formula 1 8]
ET6：
[Chemical formula 1 9]
ET7：
[Chemical formula 2 0]
The repetitive > of < binding resin
R1：
[Chemical formula 2 1]
R2：
[Chemical formula 2 2]
R3：
[Chemical formula 2 3]
R4：
[Chemical formula 2 4]
R5：
[Chemical formula 2 5]
R6：
[Chemical formula 2 6]
R7：
[Chemical formula 2 7]
R8：
[Chemical formula 2 8]
R9：
[Chemical formula 2 9]
R10: the バ イ ロ processed of (strain) company (TOYOBO CO., LTD) Application 200 spins in Japan
R11: Polyvinylchloride (Na カ ラ イ テ ス Network (nacalai tesque) (strain) system, numbering 36305-65)
R12：
[chemical formula 30]
R13：
[chemical formula 31]
The evaluating characteristics > of < photoreceptor
By the mono-layer electronic photographic photoreceptor being obtained by embodiment and comparative example be installed to removed scraper plate clearer with except electric light and transform the printer (FS-5300DN transformation apparatus, KYOCERA's office information system (strain) system) of peripheral speed 160mm/s as, by following method evaluation transfer printing storage, stain.Result is remembered in table 3,4.
(mensuration of stain generation number)
Under 40 ℃, the environmental baseline of 90%Rh, 10000, continuous printing A4 paper (Fuji-Xerox's high-quality PPC paper processed).Then, after placing 24 hours, print the blank sheet of paper original copy of A4 paper, the generation number of the black color dots that counting occurs on this A4 paper, evaluates according to following benchmark.
Zero: on every 1 A4 paper, black color dots is less than 45.
×: on every 1 A4 paper, black color dots occurs as more than 45.
Under 25 ℃, the environmental baseline of 50%Rh, with continuous 1 hour printing A4 paper (Fuji-Xerox's high-quality PPC paper processed) of the durable pattern of 5% lettering, carry out afterwards evaluation below.
(transfer printing storage)
The difference of the blank sheet of paper portion current potential of the blank sheet of paper portion current potential when closing transfer bias when opening transfer bias is evaluated as transfer printing storage current potential.
Zero: be less than 35V, ×: more than 35V
(image)
Memory image evaluation shown in Fig. 3 is carried out on A paper common printed with original copy, confirmed the having or not of generation of transfer printing storage.
Zero: without or have but almost can't see, ×: have
(sensitometry method)
Use GENTEC company system drum sensitivity test machine to make surface potential charged to the state of+800V, photosensitive surface being irradiated to the monochromatic light (light intensity 0.5 μ J/cm2) that uses the wavelength 780nm that bandpass filter takes out from the white light of Halogen lamp LED, is light sensitivity by the surface potential detection starting from exposure through the time point of 0.1 second.
Zero: be less than 150V, ×: more than 150V
[table 3]
[table 4]
Can confirm that according to above research the photoreceptor of the embodiment of the condition that meets electric charge generating material of the present invention, electron transport materials, hole transporting material and binding resin is all that light sensitivity is high, and can suppress compared with lowland the generation of stain and storage.On the other hand, the photoreceptor of comparative example can be seen the generation of stain and storage, or not talkative abundant aspect light sensitivity.
And then, according to the comparison of embodiment 1 and comparative example 1 and embodiment 11 and comparative example 2 and then known according to the result of study of comparative example 3～4, use of the present inventionly while comprising the binding resin of repetitive structure with specific ratio, effectively suppressed the generation of stain.In addition, while having confirmed that according to comparative example 5～9 content of hole transporting material and electron transport materials is less than scope of the present invention, aspect storage and light sensitivity, having problems, hole transporting material and electron transport materials crystallization while having confirmed that according to comparative example 10～11 content of hole transporting material and electron transport materials exceedes scope of the present invention.
Claims (7)
1. a mono-layer electronic photographic photoreceptor, on conductive base, possess and in same layer, at least comprise electric charge generating material, electron transport materials, the photographic layer of hole transporting material and binding resin, it is characterized in that, the thickness of described photographic layer is 10～40 μ m, described electric charge generating material comprises TiOPc pigment, with respect to described binding resin 100 mass parts, contain respectively described hole transporting material 50～120 mass parts, described electron transport materials 55～90 mass parts, described binding resin is polycarbonate resin, with respect to the quality of described polycarbonate resin, contain repetitive 15～60 quality % that represented by following formula (1),
Chemical formula 1:
In formula (1), R
1and R
2independent respectively, the alkyl of expression hydrogen atom or carbon number 1～3.
2. mono-layer electronic photographic photoreceptor according to claim 1, is characterized in that, described polycarbonate resin contains the repetitive being represented by following formula (2),
Chemical formula 2:
In formula (2), R
3and R
4independent respectively, the alkyl of expression hydrogen atom or carbon number 1～3.
3. mono-layer electronic photographic photoreceptor according to claim 1 and 2, is characterized in that, the viscosity average molecular weigh of described polycarbonate resin is more than 25000.
4. mono-layer electronic photographic photoreceptor according to claim 1 and 2, is characterized in that, described hole transporting material is selected from following chemical formula 6～Chemical formula 13,
Chemical formula 6:
Chemical formula 7:
Chemical formula 8:
Chemical formula 9:
Chemical formula 10:
Chemical formula 11:
Chemical formula 12:
Chemical formula 13:
5. mono-layer electronic photographic photoreceptor according to claim 1 and 2, is characterized in that, described electron transport materials is selected from following Chemical formula 1 4～Chemical formula 20,
Chemical formula 14:
Chemical formula 15:
Chemical formula 16:
Chemical formula 17:
Chemical formula 18:
Chemical formula 19:
Chemical formula 20:
6. an image processing system, is characterized in that, possesses: image carrier; Electro-mechanical part, for making the surface charging of described image carrier; Exposure portion for making the face exposure of charged described image carrier, thereby forms electrostatic latent image on the surface of described image carrier; Development section, for being toner image by described latent electrostatic image developing; And transfer section, for described toner image is transferred to transfer printing body from described image carrier, described image carrier possesses the mono-layer electronic photographic photoreceptor described in any one in claim 1～5.
7. image processing system according to claim 6, is characterized in that, described image processing system does not have except electric unit and scraper plate cleaning unit, and described development section adopts non-magnetic mono-component mode.
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| JP2012241393A JP5696124B2 (en) | 2012-10-31 | 2012-10-31 | Electrophotographic photosensitive member and image forming apparatus |
| JP2012-241393 | 2012-10-31 |
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| JP5696124B2 (en) | 2015-04-08 |
| CN103792802B (en) | 2017-11-17 |
| JP2014092594A (en) | 2014-05-19 |
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