CN103901741B - Electrophtography photosensor and image forming apparatus - Google Patents
Electrophtography photosensor and image forming apparatus Download PDFInfo
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- CN103901741B CN103901741B CN201310647859.7A CN201310647859A CN103901741B CN 103901741 B CN103901741 B CN 103901741B CN 201310647859 A CN201310647859 A CN 201310647859A CN 103901741 B CN103901741 B CN 103901741B
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Abstract
The present invention relates to Electrophtography photosensor and image forming apparatuses.The Electrophtography photosensor of the present invention possesses the photosensitive layer of the single-layer type below 25 μm of the film thickness including at least charge generating material, charge transport material and binding resin in support substrate.The charge generating material is phthualocyanine pigment, and the charge transport material does not have maximum absorption band between 450nm 550nm, and the electron transport materials as the charge transport material contain specific compound.In accordance with the invention it is possible to supply a kind of Electrophtography photosensor of excellent in light-resistance.In addition, the image forming apparatus of the present invention can continue to provide good image due to providing this Electrophtography photosensor as image carrier.
Description
Technical field
The present invention relates to Electrophtography photosensor and possesses the image forming apparatus of Electrophtography photosensor.
Background technology
In recent years, formed using images such as the laser beam printers, digital copier, laser facsimile of electrofax mode
The development of device is notable.The Electrophtography photosensor that image forming apparatus as these electrofax modes possesses, there is tool
The inorganic photoreceptor of the standby photosensitive layer being made of inorganic material such as selenium；And possess mainly by binding resin, charge generating material,
The Organophotoreceptor for the photosensitive layer that the organic materials such as charge transport material are formed.Among these photoreceptors, due to inorganic sense
Body of light can select the material of photosensitive layer, the degree of freedom height of design, therefore organic sense compared to easy to manufacture from extensive material
Body of light is widely used.
Organophotoreceptor requirement as used herein is to using excellent in te pins of durability when the high sensitivity of light source, reuse.
In addition, not only in actual use, but also cause photoreceptor when machine assembles and when safeguarding in the presence of by exposed extraneous light
The problem of being damaged.Speculate this is because photoreceptor is exposed, it is more so as to generate substantial amounts of electric charge capture inside photoreceptor
Cause the notable rising of residual electric potential in the case of number.Therefore, Organophotoreceptor also requires such sunproof raising.
The method that outer circumferential surface as the cylindrical substrate in Electrophtography photosensor sets organic photosensitive layer, it is previous to use
Photosensitive layer is easily managed for the dip coated of uniform coating film thickness（Dip-coating）Method.The Dipcoat method is to catch wall thickness 1mm
Left and right aluminum cylindrical substrate upper end and vertical direction is maintained to be impregnated into form the coating fluid of photosensitive layer simultaneously
In, by being promoted to form the method for photosensitive layer on outer circumferential surface with certain speed.
The forming method of the photosensitive layer uses the coating fluid for being dispersed with solid material in a solvent.Solid in coating fluid into
Point content ratio be easy to settle when increasing, therefore in order to prevent photosensitive layer the defects of occur, it is necessary to steadily maintain coating fluid
Dispersity.Therefore, it is necessary to make the solid constituent in coating fluid fully dispersed, put into and possess filter device and Xun Huan
In the circulatory system of the dip coating apparatus of device with maintain its dispersiveness.It is proposed to this end that such as patent document 1（It is Japanese special
Open flat 3-221963 publications）, in patent document 1 as the method for making the solid constituent in coating fluid fully dispersed, use
The method for being centrifuged to coating fluid, being further filtered processing.But be typically used as the manufacturing method of photoreceptor
For dip coating method due to needing larger numbers of coating liquid, centrifugation operation is miscellaneous, exists in actual use and asks greatly
Topic.In addition, if the pigment particles in dispersion liquid are not dispersed to the size being suitably distributed, then because filter generates blocking
Or pigment particles are selectively filtered, and pigment/resin in coating liquid can be caused than difference or even to the quiet of photoreceptor
Electrical characteristics affect.
It is known as overcoming the method for the above problem, uses the thin painting that can stablize the dispersity in maintenance coating fluid
Cloth liquid from carry it is large-duty in terms of on be favourable.
But in Dipcoat method, the power of the film thickness of film and the viscosity of coating liquid proportionally increases, therefore
Photosensitive layer formed it is middle using thin and low viscosity coating fluid when, necessarily formed film film.Therefore, using as utilization
During the Electrophtography photosensor that coating liquid makes, there are problems that the sunproof decline of the photosensitive layer because caused by film thickness is thin.
It is thought that due to the film thickness of photosensitive layer it is thin when, extraneous light easily enters the deeper part of photosensitive layer.
The content of the invention
In view of the above, it is an object of the invention to provide a kind of films with high sensitivity and excellent in light-resistance
The Electrophtography photosensor of photosensitive layer and possess image forming apparatus of the Electrophtography photosensor as image carrier.
The inventors discovered that do not have maximum absorption band between 450nm-550nm by containing the photosensitive layer of single-layer type
Charge transport material hole transporting material and electron transport materials, possess specific compound in charge transport material and make
For electron transport materials, so as to obtain having the electronic photographic sensitive of the film photosensitive layer of high sensitivity and excellent in light-resistance
Body, so that complete the present invention.Specifically, the present invention provides following Electrophtography photosensor and image forming apparatus.
Electrophtography photosensor involved by the scheme of the present invention, which is characterized in that possess at least in support substrate
The photosensitive layer of single-layer type below 25 μm of the film thickness including charge generating material, charge transport material and binding resin, the electricity
Lotus generating material is phthualocyanine pigment, and the hole transporting material of the charge transport material and electron transport materials exist
Do not have maximum absorption band between 450nm-550nm, and the electron transport materials as the charge transport material at least contain
One kind is by the following general formula（1）The compound of expression.
It was found that by this composition, high sensitivity can be obtained and excellent in light-resistance and be capable of providing the individual layer of good image
Type Electrophtography photosensor.
[chemical formula 1]
（General formula（1）In, R1And R2It separately represents to be selected to be taken by hydrogen atom, halogen atom, carbon number 1~20
Generation or non-substituted alkyl, the substitution or non-of the substituted or non-substituted alkoxy of carbon number 1~20, carbon number 6~20
Group in the group that substituted aryl, substituted or non-substituted amino are formed.）
In addition, the image forming apparatus involved by another program of the present invention, which is characterized in that possess：Image carrier；
Electro-mechanical part, for making the surface of image carrier charged；Exposure portion, for exposing the surface of charged image carrier, from
And form electrostatic latent image on the surface of image carrier；Development section, for being toner image by latent electrostatic image developing；And
Transfer section, for toner image to be transferred to transfer printing body from described image supporting body, described image supporting body is above-mentioned list
The photoreceptor of stratotype, the charged means are positively charged mode.
It was found that according to this constitution, it can obtain being equipped with the steady of the Electrophtography photosensor of high sensitivity and excellent in light-resistance
Fixed image forming apparatus.
By embodiments described below, other objects of the present invention, by the present invention obtain it is specific the advantages of can become
It obtains definitely.
Description of the drawings
Fig. 1 is the figure for the structure for representing the single-layer type photoreceptor of the present invention.
Fig. 2 is the schematic diagram of the structure for an example for representing the image forming apparatus of the present invention.
Specific embodiment
In the following, embodiments of the present invention will be described, but the present invention is not limited to these.
[first embodiment]
Electrophtography photosensor involved by the first embodiment of the present invention possesses in support substrate including at least electricity
The photosensitive layer of single-layer type below 25 μm of the film thickness of lotus generating material, charge transport material and binding resin, the charge occur
Material is phthualocyanine pigment, and the charge transport material does not have maximum absorption band, and conduct between 450nm-550nm
The electron transport materials of the charge transport material are at least containing one kind by the following general formula（1）The compound of expression.
[chemical formula 2]
（General formula（1）In, R1And R2It separately represents to be selected to be taken by hydrogen atom, halogen atom, carbon number 1~20
Generation or non-substituted alkyl, the substitution or non-of the substituted or non-substituted alkoxy of carbon number 1~20, carbon number 6~20
Group in the group that substituted aryl, substituted or non-substituted amino are formed.）
In the following, the Electrophtography photosensor involved by first embodiment is described in detail.The present application
Electrophtography photosensor for the photosensitive layer for possessing single-layer type on conductive base 11 as shown in Figure 1 so-called single-layer type
Electrophtography photosensor.Such as Fig. 1（a）Shown, mono-layer electronic photographic photoreceptor 20 possesses：Conductive base 11；And
On conductive base 11 use containing specific solvent photosensitive layer coating liquid formed, contain charge generating material, charge
Convey the photosensitive layer 21 of the individual layer of material and binding resin.Here, as long as mono-layer electronic photographic photoreceptor 20 possesses electric conductivity
Matrix 11 and photosensitive layer 21, then be not particularly limited.Specifically, for example, can be directly provided with feeling on conductive base 11
Photosphere 21, can also be such as Fig. 1（b）It is shown, mono-layer electronic photographic photoreceptor 20 ' conductive base 11 and photosensitive layer 21 it
Between possess interlayer 14.In addition, photosensitive layer 21 can be used as outermost layer to expose, can also possess on photosensitive layer 21 (not shown)
Protective layer.
It is here, as long as the thickness of photosensitive layer is less than 25 μm and can play one's part to the full as photosensitive layer, then not special
It does not limit.Specifically, such as preferably 10~25 μm, more preferably 18~23 μm.
（Charge generating material）
Charge generating material（CGM）Including phthualocyanine pigment.As long as phthualocyanine pigment is used as Electrophtography photosensor
Charge generating material substance, then be not particularly limited.As the concrete example of phthualocyanine pigment, can enumerate by following formula
（2）The X-type metal-free phthalocyanine of expression（x-H2Pc）, by following formula（3）The TiOPcs such as the α types or Y types of expression.
[chemical formula 3]
[chemical formula 4]
Among those, it is preferred from sensitivity aspect（A）In CuK α characteristic X-ray difraction spectrums, in Bradley
2 θ ± 0.2 °=27.2 ° of lattice angle have main peak,（B）In differential scanning calorimetric analysis, except the gasification with absorption water
Beyond peak, there are one the TiOPcs at peak for tool in the range of 50~270 DEG C；Except（A）Feature outside,（C）It is swept in differential
It retouches in thermometric analysis, in addition to the peak of the gasification of absorption water, does not have the phthalocyanine at peak in the range of 50~400 DEG C
Oxygen titanium；Except（A）Feature outside,（D）In differential scanning calorimetric analysis, except with absorption water gasification peak with
Outside, do not have peak in the range of 50~270 DEG C, there are one the TiOPcs at peak for tool in the range of 270~400 DEG C.
Charge generating material can also include except phthalocyanine together in the range of the purpose of the present invention is not hindered with phthalocyanine
Charge generating material beyond series pigments.As the example of the charge generating material in addition to phthualocyanine pigment, can enumerate
Two thio ketone pyrrolo-pyrrole pigments, without metal naphthalene phthalocyanine pigment, metal naphthalene phthalocyanine pigment, square acid color, indigo pigments, Azulene face
Material, phthalocyanine pigments（シ ア ニ Application face material）, selenium, selenium-tellurium, selenium-arsenic, cadmium sulfide, the powder of inorganic light conductive material such as non-crystalline silicon,
Pyralium salt, anthanthrone series pigments, triphenylmenthane series pigments, reduction（スレン）Series pigments, toluidines series pigments, pyrazoline
Series pigments, quinacridone pigment etc..
（Charge transport material）
Charge transport material used in the present invention is included selected from hole transporting material（HTM）And electron transport materials
（ETM）One or more of material.These do not have maximum absorption band between 450nm-550nm, and defeated as electronics
One of material is sent, it is necessary at least containing one kind by the following general formula（1）The compound of expression.
[chemical formula 5]
（General formula（1）In, R1And R2It separately represents to be selected to be taken by hydrogen atom, halogen atom, carbon number 1~20
Generation or non-substituted alkyl, the substitution or non-of the substituted or non-substituted alkoxy of carbon number 1~20, carbon number 6~20
Group in the group that substituted aryl, substituted or non-substituted amino are formed.）
As R1And R2For halogen atom when example, chlorine atom, bromine atoms, fluorine atom and iodine atom can be enumerated.
R1And R2For substituted or non-substituted alkyl when, the carbon number of alkyl is 1~20, is preferably 1~12, more preferably
For 1~8.In addition, the carbon number of alkyl does not include the carbon number with alkyl linked substituent group.The structure of alkyl can be
Straight-chain, branched, ring-type and combine these structures any one.It, can as the example for the substituent group that alkyl can have
To enumerate halogen atom, hydroxyl, the alkoxy of carbon number 1~4, carbonyl, ester group and cyano etc..The substituent group that alkyl can have
Quantity be not particularly limited in the range of the purpose of the present invention is not hindered.
As the concrete example of non-substituted alkyl, methyl, ethyl, n-propyl, isopropyl, cyclopropyl, positive fourth can be enumerated
Base, isobutyl group, sec-butyl, tertiary butyl, cyclobutyl, n-pentyl, 1,2- dimethyl propyls, cyclopenta, n-hexyl, cyclohexyl, just
Heptyl, n-octyl, n-nonyl, positive decyl, n-undecane base, dodecyl, n-tridecane base, n-tetradecane base, positive 15
Alkyl, n-hexadecyl, n-heptadecane base, n-octadecane base, NSC 77136 base and n-eicosane base etc..
As the concrete example of substitution alkyl, chloromethyl, dichloromethyl, trichloromethyl, bromomethyl, dibromo first can be enumerated
Base, trisbromomethyl, methyl fluoride, difluoromethyl, trifluoromethyl, cyanogen methyl, methylol, methoxy, ethoxyl methyl, positive third
Oxygroup methyl, 2- hydroxyethyls, 2- chloroethyls, 2- bromoethyls, 2- methoxy ethyls, 2- ethoxyethyl groups, 2- positive propoxy second
Base, 3- chlorine n-propyl, 3- bromines n-propyl, 3- hydroxy-n-propyls, 3- methoxyl groups n-propyl, 3- ethyoxyls n-propyl and positive third oxygen of 3-
Base n-propyl, 2- glutamate diethyl ester bases etc..
It is preferably 1,2- dimethyl propyls and 2- ethoxyethyl groups among these groups.
R1And R2For substituted or non-substituted alkoxy when, the carbon number of alkoxy is 1~20, is preferably 1~12, more
Preferably 1~8.In addition, the carbon number of alkoxy does not include the carbon number for the substituent group being bonded with alkoxy.Alkoxy
Structure can be straight-chain, branched, ring-type and combine these structures any one.It is taken as what alkoxy can have
The example of Dai Ji can enumerate halogen atom, hydroxyl, the alkoxy of carbon number 1~4 and cyano etc..What alkoxy can have
The quantity of substituent group is not particularly limited in the range of the purpose of the present invention is not hindered.
As the concrete example of non-substituted alkoxy, methoxyl group, ethyoxyl, positive propoxy, isopropoxy, ring can be enumerated
Propoxyl group, n-butoxy, isobutoxy, sec-butoxy, tert-butoxy, cyclobutoxy group, n-pentyloxy, 1,2- dimethyl propylene oxygen
Base, cyclopentyloxy, positive hexyloxy, cyclohexyloxy, positive oxygroup in heptan, n-octyloxy, positive nonyl epoxide, n-decyloxy, n-undecane oxygen
Base, n-dodecane oxygroup, n-tridecane oxygroup, n-tetradecane oxygroup, n-pentadecane oxygroup, hexadecane oxygroup, n-heptadecane
Oxygroup, n-octadecane oxygroup, NSC 77136 oxygroup and n-eicosane oxygroup etc..
As the concrete example of substituted alkoxy, chloromethane oxygroup, dichloro methoxyl group, trichloromethoxy, bromine methoxy can be enumerated
Base, dibromo methoxyl group, tribromo methoxyl group, fluorine methoxyl group, difluoro-methoxy, trifluoromethoxy, cyanogen methoxyl group, hydroxymethoxy,
Methoxymethoxy, (ethoxymethyl) oxygroup, positive propoxy methoxyl group, 2- hydroxyl-oxethyls, 2- chloroethoxies, 2- bromine oxethyls,
2- methoxy ethoxies, 2- ethoxy ethoxies, 2- positive propoxies ethyoxyl, 3- chlorine positive propoxy, 3- bromines positive propoxy, 3- hydroxyls
Base positive propoxy, 3- methoxy-n-propyloxies, 3- ethyoxyls positive propoxy and 3- positive propoxy positive propoxies etc..
R1And R2For substituted or non-substituted aryl when, the carbon number of aryl is 6~20, is preferably 6~14, more preferably
For 6~10.Typically, aryl is preferably that phenyl or phenyl ring are condensed or are connected by singly-bound the group to be formed.It can as aryl
The example for the substituent group having can enumerate halogen atom, hydroxyl, the alkyl of carbon number 1~4, the alkane of carbon number 1~4
Oxygroup, nitro, cyano, the aliphatic acyl radical of carbon number 2~4, benzoyl, phenoxy group, the alkane for including carbon number 1~4
Alkoxy carbonyl and carbobenzoxy of oxygroup etc..The quantity for the substituent group that aryl can have is not hindering the model of the purpose of the present invention
It is not particularly limited in enclosing.
As the concrete example of non-substituted aryl, can enumerate phenyl, naphthalene, xenyl, terphenyl, anthryl, phenanthryl,
Pyrenyl and base.As the concrete example of substituted aryl, o-tolyl, tolyl, p-methylphenyl, O-methoxy benzene can be enumerated
Base, m-methoxyphenyl, p-methoxyphenyl, O-ethoxyl base, m-oxethyl phenyl, to ethoxyl phenenyl, Chloro-O-Phenyl,
Between chlorphenyl, rubigan, O-Nitrophenylfluorone, m-nitro base, p-nitrophenyl and 2- ethyl -5- aminomethyl phenyls etc..
R1And R2For substituted or non-substituted amino when, the meaning of non-substituted amino refers to by-NH2The group of expression, takes
Refer to for the meaning of amino by-NH2At least one hydrogen atom of the group of expression be chosen free carbon atom number 1~10 alkyl and
There can be the group of the group substitution in the group of the phenyl composition of substituent group.It, can as the example for the substituent group that phenyl can have
To enumerate halogen atom, hydroxyl, the alkyl of carbon number 1~4, the alkoxy of carbon number 1~4, nitro, cyano, carbon atom
Aliphatic acyl radical, benzoyl, phenoxy group, the alkoxy carbonyl of alkoxy including carbon number 1~4 and the benzene oxygen of number 2~4
Carbonyl etc..
As the concrete example of substituted or non-substituted amino, amino, methylamino, ethylamino, n-propyl can be enumerated
Amino, isopropylamino, n-butylamino, phenyl amino, o-tolylamino, p-methylphenyl amino, Tolylamino, two
Methylamino, N- methyl-N-ethylaminos, N- methyl-N-phenyls, diethylamino, N- ethyl-N-phenylaminos, two
N-propyl amino and N- n-propyl-N- phenyl aminos etc..
As by above-mentioned general formula（1）It represents and does not have the tool of the compound of maximum absorption band between 450nm-550nm
Body example may be exemplified following substance, but be not limited to these.
[chemical formula 6]
（Hole transporting material）
As hole transporting material（HTM）As long as it can be used as empty included in the photosensitive layer of Electrophtography photosensor
Cave conveys material, does not have maximum absorption band between 450nm-550nm, is then not particularly limited.As hole transporting material
Concrete example, benzidine derivative, (the 4- methylamino phenyl of 2,5- bis- can be enumerated）- 1,3,4- oxadiazoles Deng oxadiazoles system
It closes the carbazoles based compounds such as styrenics, the polyvinyl carbazole such as object, 9- (4- diethylaminos styryl) anthracene, have
Machine polysilane compound, 1- phenyl -3- are (to dimethylaminophenyl）The pyrazolines such as pyrazoline based compound, hydrazone based compound,
Triphen amine compound, indoles based compound, oxazole based compound, isoxazole based compound, thiazole compound, triazole system
Close nitrogenous cyclic compound, the fused-polycyclic compounds such as object etc..Among these hole transporting materials, more preferably in the molecule
Triphen amine compound with one or more triphenylamine skeletons.These hole transporting materials can be used alone, can also
It is used in combination of two or more.As the preferred example for the hole transporting material that can be used in the present invention, can enumerate with
Under substance.
[chemical formula 7]
（Electron transport materials）
Electron transport materials（ETM）It must include by above-mentioned general formula（1）The compound of expression.Electron transport materials are not hindering
In the range of hindering the purpose of the present invention, be additionally may included in do not have between 450nm-550nm maximum absorption band, by general formula
（1）Other electron transport materials outside the compound of expression.As not having maximum absorption band between 450nm-550nm
Compound, and by general formula（1）The example of other electron transport materials outside the compound of expression can enumerate naphthoquinones derivative
The quinones such as object, diphenoquinone, anthraquinone derivative, azo quinone derivative, nitroanthraquinone derivative, dinitroanthraquinone derivative spread out
Biology, malononitrile derivative, thio-pyrylium derivative, trinitro- thioxanthone derivates, 3,4,5,7- tetranitros -9-Fluorenone derive
Object, dinitro anthracene derivant, dinitro acridine derivatives, tetracyanoethylene, 2,4,8- trinitro-s thioxanthones, dinitrobenzene, dinitro
Base anthracene, dinitro acridine, succinic anhydride, maleic anhydride and dibromomaleic acid acid anhydride etc..Electron transport materials can be used alone,
It can be used in combination of two or more.
When selecting above-mentioned hole transporting material and electron transport materials, the mobility of preferably hole transporting material exists
Electric field strength 3 × 105It is 5 × 10 in V/cm-7cm2/ more than Vs, and the mobility of the electron transport materials is in electric-field strength
Degree 5 × 105It is 1 × 10 in V/cm-9cm2/ more than Vs.This is because the electron-transporting properties of photosensitive layer can be improved, in band just
Electricity can make the planarization of the potential difference of the exposure portion that the photosensitive layer in transfer printing process generates and non-exposed portion when using, therefore can
Inhibit the generation of transfer storage.
In addition, the assay method as this mobility, which is added in a manner of 30 mass % concentration
To the solution in the polycarbonate resin of average molecular weight 20,000 as the coating fluid for measuring sample.Then, on base material
Obtained coating fluid is coated with, carries out being heat-treated for 30 minutes at 80 DEG C, makes the measure sample of 7 μm of film thickness.So obtained survey
Sample is determined in the environment of 25 DEG C, uses common drift time（TOF, Time of Flight）Method measures electron mobility.
In addition, electric field strength when measuring is 3 × 10 in hole mobility5V/cm, it is 5 × 10 in electron mobility5The one of V/cm
Definite value.
（Binding resin）
As binding resin, as long as it can be used as bonding tree included in the photosensitive layer in Electrophtography photosensor
Fat is then not particularly limited.As the concrete example for the resin for being preferably used as binding resin, polycarbonate resin, benzene can be enumerated
Vinylite, styrene-butadiene copolymer, styrene-acrylonitrile copolymer, styrene-maleic acid copolymer, benzene second
Alkene-acrylic copolymer, acrylic copolymer, polyvinyl resin, vinyl-vinyl acetate copolymer, chlorinated polyethylene resin,
Corvic, acrylic resin, ionomer, vinyl chloride vinyl acetate copolymer, polyester resin, alkyd resin, polyamides
Polyimide resin, polyurethane resin, polyarylate resin, polysulfone resin, diallyl phthalate ester resin, ketone resin, polyethylene
The thermoplastic resins such as polyvinyl butyral resin, polyether resin；Organic siliconresin, epoxy resin, phenolic resin, carbamide resin, melamine
The thermosetting resin of polyimide resin and other bridging property thermosetting resins etc.；Epocryl, urethanes-propylene
The light-cured resins such as acid esters copolymer resins.These resins may be used singly or in combination of two or more use.
Among these resins, from the balancing good that can obtain processability, mechanical characteristic, optical characteristics, wearability
It sets out in terms of photosensitive layer, more preferably bisphenol z-polycarbonate resin, bisphenol Z c-type polycarbonate resin, the poly- carbon of bisphenol-c type
The polycarbonate resins such as acid ester resin and bisphenol A polycarbonate resin.
The viscosity average molecular weigh of binding resin is preferably more than 20000.By the way that the viscosity average molecular weigh of binding resin is set to this
Kind scope, so as to which binding resin becomes appropriate hardness, even if increasing, charge transport material wear resistance is also excellent, can inhibit
Form the generation of the stain in image.In addition, from deliquescent aspect in organic solvent, viscosity average molecular weigh is preferred
For less than 60000.
（Additive）
The photosensitive layer of Electrophtography photosensor is not in the range of electron photographic property brings harmful effect, except charge
Beyond generating material, hole transporting material, electron transport materials and binding resin, also comprising various additives.As can coordinate
Additive in photosensitive layer, for example, antioxidant, radical scavenger, singlet quencher, ultraviolet radiation absorption
The anti-deterioration agents such as agent, softening agent, plasticizer, polycyclc aromatic compound, surface modifier, incremental agent, tackifier, stably dispersing
Agent, wax, oil, receptor, donor, surfactant and levelling agent etc..
（The manufacturing method of Electrophtography photosensor）
The manufacturing method of Electrophtography photosensor is not particularly limited in the range of the purpose of the present invention is not hindered.As
The preferred example of the manufacturing method of Electrophtography photosensor, can enumerate the coating solution of photosensitive layer in electric conductivity base
The method that photosensitive layer is formed on body.Specifically, such as in the case of the manufacturing method of mono-layer electronic photographic photoreceptor,
Can by will dissolve in a solvent or be dispersed with charge generating material, charge transport material, binding resin and as needed also
It dissolves or is dispersed with the coating solutions of various additives etc. on conductive base, and be dried and manufacture.Coating method
It is not particularly limited, for example, using spin coater, applicator, flush coater, metering bar coater, dip coater, wiping
The method of knife etc..It is preferably to use since continuous production can be carried out and economy is excellent among these coating methods
The infusion process of dip coater.In addition, the drying means as the film being formed on conductive base, for example, 80~
Method that heated-air drying is carried out under conditions of 150 DEG C and 15~120 minutes etc..
In the Electrophtography photosensor of the present invention, the charge generating material in photosensitive layer（CGM）, hole transporting material
（HTM）It is suitably selected, and is not particularly limited with each content of binding resin.Specifically, such as charge generating material
Content, be preferably 0.1~50 mass % compared with the quality of binding resin, more preferably 0.5~10 mass %.In addition, hole
The content of material is conveyed, is preferably 20~150 mass % compared with the quality of binding resin, more preferably 40~100 mass %.
The content of electron transport materials is preferably 45~95 mass % compared with the quality of binding resin, more preferably 45~80 matter
Measure %.
As the solvent contained in the coating fluid of photosensitive layer, if can make composition photosensitive layer each ingredient dissolve or
It is scattered, then it is not particularly limited.Specifically, the alcohols such as methanol, ethyl alcohol, isopropanol, butanol can be enumerated；N-hexane, octane,
The fatty families hydrocarbon such as hexamethylene；The aromatic hydrocarbons such as benzene,toluene,xylene；The halogen such as dichloromethane, dichloroethanes, carbon tetrachloride, chlorobenzene
For hydrocarbon；The ethers such as methyl ether, ether, tetrahydrofuran, glycol dimethyl ether, diethylene glycol dimethyl ether；Acetone, butanone, methyl-isobutyl
The ketones such as ketone, cyclohexanone；The esters such as ethyl acetate, methyl acetate；Dimethylformaldehyde, dimethylformamide, dimethyl sulfoxide etc. are non-
Protic polar organic solvent.These solvents may be used singly or in combination of two or more use.
[second embodiment]
Second embodiment of the present invention possesses：Image carrier；Electro-mechanical part, for making the surface band of image carrier
Electricity；Exposure portion for exposing the surface of charged image carrier, is dived so as to form electrostatic on the surface of image carrier
Picture；Development section, for being toner image by latent electrostatic image developing；And transfer section is used to hold toner image from image
Carrier is transferred to transfer printing body, mono-layer electronic photographic photoreceptor of the image carrier involved by first embodiment.Second
Image forming apparatus involved by embodiment is due to possessing said structure, particularly in the situation without de-energization unit
Under, it can also inhibit the generation of storage, obtain good image.
As the image forming apparatus of the present invention, well-known device is used with being not particularly limited.Wherein, it is excellent
Choosing uses the color image forming device of the series system of multi-color toner, but it's not limited to that.More specifically, Ke Yiju
Go out the color image forming device of the shown series system using multi-color toner as described below.
Possess the image forming apparatus of the Electrophtography photosensor involved by present embodiment, possess：Multiple images carry
Body, in order to be formed on each surface by toner image that the toner of a variety of colors different from each other is formed and in regulation side
It is set up in parallel upwards；And multiple development sections, possessing developer roll, the developer roll is oppositely disposed with each image carrier, and
Toner is carried on surface and is transported, and the toner transported is fed separately to the surface of each image carrier, is made
Positively charged mono-layer electronic photographic photoreceptor is used respectively for each image carrier.
Fig. 2 is the image forming apparatus for representing to possess the Electrophtography photosensor involved by the first embodiment of the present invention
Structure schematic diagram.As image forming apparatus, monochrome image forming apparatus, color image forming device can be suitable for
Any one, enumerates the image forming apparatus of the series system using multi-color toner herein.Here, the colour to series system
Image forming apparatus illustrates.
As shown in Fig. 2, the color printer 1 has the equipment body 1a of box.Confession is provided in equipment body 1a
Sheet feed section 2 to paper P is transported the paper P supplied from the sheet feed section 2 and will be transferred based on the toner image of image data etc.
The unfixing toner that image forming part 3 and implementation on to paper P will be transferred on paper P in the image forming part 3
Image is fixed to the fixing section 4 of the fixing processing on paper P.Further, discharge is provided on the upper surface of equipment body 1a
The paper discharge unit 5 of the paper P of fixing processing is implemented in fixing section 4.
Sheet feed section 2 possesses paper feeding cassette 121, takes paper bowl 122, paper feed roller 123,124,125 and resistance roller 126.Paper feeding cassette
121 are configured to plug off at equipment body 1a, store the paper P of various sizes.Paper bowl 122 is taken to be arranged on paper feeding cassette
The paper P being stored in paper feeding cassette 121 is taken out in 121 upper left side position shown in Fig. 2 one by one.Paper feed roller 123,124,125 will
Sheet conveying passage is passed out to by the paper P that paper bowl 122 is taken to take out.Resistance roller 126 makes to send by paper feed roller 123,124,125
Go out to sheet conveying passage paper P temporarily it is standby after, image forming part 3 is supplied to defined timing.
In addition, sheet feed section 2 is further equipped with the (not shown) manual of the left surface shown in Fig. 2 mounted on equipment body 1a
Pallet and take paper bowl 127.This takes paper bowl 127 to take out the paper P being placed in manual pallet.Pass through the paper that paper bowl 127 is taken to take out
It opens P and sheet conveying passage is sent to by paper feed roller 123,125, and pass through resistance roller 126 and be fed into defined timing
Image forming part 3.
Image forming part 3 possesses image formation unit 7, by the image formation unit 7 on its surface（Contact surface）Upper quilt
The intermediate transfer belt 31 of toner image of the primary transfer based on the image data from transmission such as computers and for making in this
Between toner image in transfer belt 31 be secondarily transferred to from the secondary transfer roller 32 on the paper P that paper feeding cassette 121 is sent into.
Image formation unit 7 possesses from upstream side（It is right side in fig. 2）The black unit that downstream side is arranged successively
7K, yellow unit 7Y, indigo unit 7C and magenta unit 7M.Each unit 7K, 7Y, 7C and 7M are configured as
Respective middle position is along arrow（Clockwise）Direction can rotatably be configured with the electronic photographic sensitive as image carrier
Body 37（Following photoreceptor " 37 "）.Moreover, it is each configured with successively from the upstream side of direction of rotation around each photoreceptor 37
Electro-mechanical part 39, exposure portion 38, development section 71, cleaning section (not shown) and as de-power unit except electric appliance etc..In the present invention,
Due to not having except electric appliance is except electrician's sequence can also form image well, space saving can be realized.
Electro-mechanical part 39 makes the circumferential surface of the Electrophtography photosensor rotated in the direction of the arrow 37 equably charged.Electro-mechanical part 39
The circumferential surface of Electrophtography photosensor 37 can be made equably charged, be not specially limited, can be cordless, it can also
It is the way of contact.As the concrete example of electro-mechanical part, corona charging device, charged roller, band brush etc., more preferably band can be enumerated
Electric roller, the Charging system with ways of contact such as brushes.By using the electro-mechanical part 39 of the way of contact, can inhibit by electro-mechanical part 39
The discharge of the ozone and nitrogen oxides isoreactivity gas of generation, can prevent the Electrophtography photosensor as caused by active gases
The deterioration of photosensitive layer, and the design of working environment etc. can have been accounted for.
In the electro-mechanical part 39 for the charged roller for possessing the way of contact, charged roller makes sense in the state of being contacted with photoreceptor 37
The circumferential surface of body of light 37（Surface）It is charged.As this charged roller, for example, in the state of being contacted with photoreceptor 37, from
Roller for belonging to the rotation of photoreceptor 37 and rotating etc..In addition, as charged roller, for example, at least surface element is by resin structure
Into roller etc..More specifically, for example, possessing has the plug that can be rotatably supported by axis, is formed on plug
Resin bed and roller that alive voltage application portion is applied to plug etc..The electro-mechanical part for possessing this charged roller is applied by voltage
Portion applies voltage to plug, so as to make the surface of the photoreceptor 37 via resin bed contact charged.
Preferably, it is only DC voltage to be applied to the voltage of charged roller by voltage application portion.It is applied to by charged roller
The DC voltage of Electrophtography photosensor is preferably 1000~2000V, more preferably 1200~1800V, and particularly preferably 1400
~1600V.With being superimposed alternating voltage or to DC voltage the superimposed voltage of alternating voltage and being applied to the situation phase of charged roller
Than in the case of only applying DC voltage to charged roller, there are the tendencies of the wear extent reduction of photosensitive layer.
In addition, forming the resin of the resin bed of charged roller as long as the circumferential surface of photoreceptor 37 can be made charged well, then not
It is particularly limited to.As the concrete example of the resin for resin bed, silicone resin, polyurethane resin, silicone modified tree can be enumerated
Fat etc..Furthermore it is also possible to make to contain inorganic filling material in resin bed.
Exposure portion 38 is so-called laser scan unit, to the circumferential surface of the photoreceptor 37 by 39 uniform charged of electro-mechanical part,
Irradiation is based on from the personal computer as epigyny device（PC）The laser of the image data of input forms base on photoreceptor 37
In the electrostatic latent image of image data.Development section 71 supplies toner by the circumferential surface of the photoreceptor 37 to being formed with electrostatic latent image,
Form the toner image based on image data.Moreover, the toner image is transferred on intermediate transfer belt 31.Cleaning
Portion after the primary transfer of intermediate transfer belt 31 terminates, cleans the tune remained on the circumferential surface of photoreceptor 37 in toner image
Toner.By cleaning section clean the circumferential surface of the photoreceptor 37 of processing, for new on-line treatment towards electro-mechanical part 39,
Carry out new on-line treatment.
Intermediate transfer belt 31 is the banding rotary body of ring-shaped, with surface（Contact surface）Side and the circumferential surface point of each photoreceptor 37
The mode not abutted is erected on multiple rollers such as driven roller 33, driven voller 34, support roller 35 and primary transfer roller 36.Separately
Outside, intermediate transfer belt 31 is configured to be pressed against photoreceptor in the primary transfer roller 36 by being oppositely disposed with each photoreceptor 37
In the state of 37, pass through multiple roller ring rotations.Driven roller 33 is used for by the driving sources rotation driving such as stepping motor, application
Make the driving force of 31 ring rotation of intermediate transfer belt.Driven voller 34, support roller 35 and primary transfer roller 36 are arranged to rotate
Freely, and with the ring rotation of the intermediate transfer belt 31 as caused by driven roller 33 driven rotation is carried out.These rollers 34,35,
36 support intermediate transfer belt 31 while carrying out driven rotation via intermediate transfer belt 31 according to the active rotation of driven roller 33.
Primary transfer roller 36 applies intermediate transfer belt 31 primary transfer bias（It is opposite with the charged polarity of toner
Polarity）.Thus, the toner image being formed on each photoreceptor 37 is between each photoreceptor 37 and primary transfer roller 36,
It is transferred successively with the state of overlapping coating（Primary transfer）To the drives edge arrow by driven roller 33（Counterclockwise）It revolves in direction
On the intermediate transfer belt 31 turned.In the present invention, applying electric current can be used below in -8 μ A.
Secondary transfer roller 32 applies paper P to be biased with the secondary transfer printing of toner image opposite polarity.In this way, by once
The toner image being transferred on intermediate transfer belt 31 is transferred between secondary transfer roller 32 and support roller 35 on paper P,
Accordingly, the transferred image of chromatic colour is transferred on paper P（Unfixed toner image）.
Fixing section 4 is to implement the part of fixing processing for the transferred image being transferred in image forming part 3 on paper P,
Possessing has the heating roller heated by heating power body 41 and is oppositely disposed with heating roller 41 and circumferential surface is pressed and abuts to
The backer roll 42 of the circumferential surface of heating roller 41.
Moreover, being transferred to by secondary transfer roller 32 transferred image on paper P in image forming part 3, pass through the paper
The fixing processing carried out by heating when opening P by between heating roller 41 and backer roll 42 is fixed on paper P.It is moreover, real
The paper P of fixing processing has been applied to 5 paper discharge of paper discharge unit.In addition, in the color printer 1 of present embodiment, fixing section 4 with
Appropriate location between paper discharge unit 5 is equipped with transport roller 6.
The top depression of the equipment body 1a that paper discharge unit 5 passes through color printer 1 is formed, in the bottom of concave recess portion
Reception is formed with by the discharge tray 51 of the paper P of paper discharge.
Color printer 1 is acted by image formation as described above, and image is carried out on paper P and is formed.Moreover, such as
In the upper image forming apparatus, due to as image carrier, possessing the positively charged involved by embodiments of the present invention
Single layer type electrophotograph mode, therefore the preferred image for the influence for not transferring storage can be formed.
[embodiment]
In the following, more specific description is carried out to the present invention by embodiment.In addition, the present invention is not limited to embodiments.
[photoreceptor making]
By phthualocyanine pigment, hole transporting material and electron transport materials, the binding resin shown in table 1（Glue equal molecule
Amount 30000）100 mass parts are put into ball mill together with 800 mass parts of tetrahydrofuran, and mixing when progress 50 is small simultaneously makes its point
It dissipates to have made individual layer photoreceptor coating fluid.Then, which is coated on by dip coating on the aluminum pipe base of φ 30,
The heated-air drying of 40 minutes is carried out at 100 DEG C afterwards, has obtained the photoreceptor of 20 μm of photosensitive layer film thickness.
In addition, charge generating material（CGM）, hole transporting material（HTM）, electron transport materials（ETM）And binding resin
Following substances are used respectively.Among the electron transport materials of research, only ET12 has between 450~500nm to be absorbed greatly
Peak, there is no the very big peaks of absorption in co-wavelength region for other substances.
<Charge generating material（CGM）>
CG1：x-H2Pc
CG2：y-TiOPc
CG1 and CG2 is in CuK α characteristic X-ray difraction spectrums, has maximum in 2 θ ± 0.2 °=27.2 ° of Bragg angle
Peak, and 26.2 ° do not have peak titanyl phthalocyanin crystals.
CG3：k-TiOPc
CG3 is in CuK α characteristic X-ray difraction spectrums, has maximum peak in 2 θ ± 0.2 °=27.2 ° of Bragg angle,
And do not have peak at 26.2 °, in differential scanning calorimetric analysis, in addition to the peak of the gasification of absorption water, 270
DEG C to 400 DEG C tool there are one peak titanyl phthalocyanin crystal.
<Hole transporting material（HTM）>
The Λ max shown after following each mark represent the wavelength of maximum absorption band.
HT1：（Λmax：393nm）
[chemical formula 8]
HT2：（Λmax：408nm）
[chemical formula 9]
HT3：（Λmax：409nm）
[chemical formula 10]
HT4：（Λmax：361nm）
[chemical formula 11]
HT5：（Λmax：379nm）
[chemical formula 12]
<Electron transport materials（ETM）>
ET1：（Λmax：358nm）
[chemical formula 13]
ET2：（Λmax：355nm）
[chemical formula 14]
ET3：（Λmax：357nm）
[chemical formula 15]
ET4：（Λmax：357nm）
[chemical formula 16]
ET5：（Λmax：356nm）
[chemical formula 17]
ET6：（Λmax：356nm）
[chemical formula 18]
ET7：（Λmax：356nm）
[chemical formula 19]
ET8：（Λmax：304nm）
[chemical formula 20]
ET9：（Λmax：422nm）
[chemical formula 21]
ET10：（Λmax：400nm）
[chemical formula 22]
ET11：（Λmax：420nm）
[chemical formula 23]
ET12：（Λmax：490nm）
[chemical formula 24]
ET13：（Λmax：490nm）
[chemical formula 25]
<Binding resin>
R1：The polycarbonate resin formed from the unit of bisphenol Z
[chemical formula 26]
The photoreceptor made by following methods evaluation, the results are shown in table 1.
<Sensitometry method>
Make surface potential charged to+700V, to photoreceptor using GENTEC company systems drum sensitivity test machine
The monochromatic light of the wavelength 780nm taken out from the white light of halogen lamp using bandpass filter is irradiated on surface（0.8 μ J/ of luminous intensity
cm2）, the surface potential detection by the time point that 0.1 second is begun to pass through from exposure is sensitivity.
Surface potential after exposure is evaluated as zero when being less than 150V, and when more than 150V is evaluated as ×.
<Investigation on Photodegradation method>
Make Panasonic Corporation Ha イ ラ イ ト FL15W white fluorescent lamps under the intensity of 1000Lx light irradiation 2 it is small when, confirm
Irradiation portion and the sensitivity in non-irradiated portion are poor（The method identical with sensitometry method）, 1d2s images（1: 2 space
Half tone image）In density unevenness.The evaluation of density unevenness is removed in not having for kyocera office information system Co. Ltd. system
The image forming apparatus of the structure in electric portion（" FS-5300DN " transformation apparatus）The middle electrofax sense for installing each embodiment and comparative example
Body of light carries out.
Above-mentioned irradiation portion and the sensitivity difference Δ V in non-irradiated portionLLess than 20V be zero, more than 20V for ×.
It is zero that degree is not seen~may be seen indistinctly to above-mentioned density unevenness, be when can significantly confirm unevenness ×.
<Integrated judgment>
Evaluation for sensitivity is related to the evaluation of sunproof sensitivity difference and is related to sunproof density unevenness
Evaluation in the photoreceptor that does not have × judge be determined as zero in integrated judgment, for there are one it is above × judge it is photosensitive
Body is determined as in integrated judgment ×.
[table 1]
When using the single layer electronic electrophotographic photoconductor of the embodiment of the present invention 1~18, high photosensitive of sensitivity can obtain
Body, and can confirm that light resistance is also excellent.In contrast, spy is not included in the photosensitive layer as shown in comparative example 1~5 is used
During the individual layer photoreceptor of fixed charge transport material, it is thus identified that there are the bad of photoreceptor caused by the light irradiation of white fluorescent lamp
Change.
Claims (2)
1. a kind of image forming apparatus, which is characterized in that possess：
Image carrier；
Electro-mechanical part, for making the surface of described image supporting body charged；
Exposure portion, for exposing the surface of charged described image supporting body, so as on the surface of described image supporting body
Form electrostatic latent image；
Development section, for being toner image by the latent electrostatic image developing；And
Transfer section, for the toner image to be transferred to transfer printing body from described image supporting body,
Described image supporting body is following positively charged mono-layer electronic photographic photoreceptor：Possessing in support substrate only includes charge
Material occurs for the photosensitive layer of the single-layer type below 25 μm of the film thickness of generating material, charge transport material and binding resin, the charge
Expect for phthualocyanine pigment, and the hole transporting material of the charge transport material and electron transport materials are in 450nm-
Do not have maximum absorption band between 550nm, and the electron transport materials as the charge transport material at least contain one
Compound of the kind in 16~chemical formula of following chemical formula 19,
The electro-mechanical part is positively charged mode,
Described image forming apparatus does not possess de-power unit,
Chemical formula 16：
Chemical formula 17：
Chemical formula 18：
Chemical formula 19：
2. image forming apparatus according to claim 1, which is characterized in that the hole of the photosensitive layer of the single-layer type
Conveying material is following chemical formula 8,
Chemical formula 8：
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-281711 | 2012-12-25 | ||
| JP2012281711A JP5814221B2 (en) | 2012-12-25 | 2012-12-25 | Electrophotographic photosensitive member and image forming apparatus |
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| CN103901741B true CN103901741B (en) | 2018-06-05 |
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| JP6408877B2 (en) * | 2014-11-17 | 2018-10-17 | 株式会社パーマケム・アジア | Electron transport material and electronic material using the electron transport material |
| CN107430359B (en) * | 2015-04-03 | 2021-08-03 | 京瓷办公信息系统株式会社 | Positively-charged single-layer electrophotographic photoreceptor, process cartridge, and image forming apparatus |
| JP6515878B2 (en) * | 2016-06-22 | 2019-05-22 | 京セラドキュメントソリューションズ株式会社 | Electrophotographic photosensitive member, image forming apparatus, and process cartridge |
Citations (4)
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|---|---|---|---|---|
| JP2001242656A (en) * | 2000-02-25 | 2001-09-07 | Kyocera Mita Corp | Electrophotographic photoreceptor |
| JP2001255678A (en) * | 2000-03-10 | 2001-09-21 | Kyocera Mita Corp | Image forming device using positive electrification type monolayer electrophotographic photoreceptor |
| CN101082784A (en) * | 2006-06-02 | 2007-12-05 | 夏普株式会社 | Electro-photographic photoconductor and image forming apparatus |
| JP2011158711A (en) * | 2010-02-01 | 2011-08-18 | Mitsubishi Chemicals Corp | Electrophotographic photoreceptor, image forming apparatus, and electrophotographic cartridge |
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| JP3292461B2 (en) * | 1998-05-28 | 2002-06-17 | 京セラミタ株式会社 | Naphthalenetetracarboxylic diimide derivative and electrophotographic photoreceptor |
| JP2000019748A (en) * | 1998-07-01 | 2000-01-21 | Mita Ind Co Ltd | Negatively charged single layer type electrophotographic photoreceptor |
| JP3559173B2 (en) * | 1998-07-01 | 2004-08-25 | 京セラミタ株式会社 | Negatively charged single-layer type electrophotographic photoreceptor |
| JP3597996B2 (en) * | 1998-07-01 | 2004-12-08 | 京セラミタ株式会社 | Negatively charged single-layer type electrophotographic photoreceptor |
| JP3638500B2 (en) * | 2000-04-26 | 2005-04-13 | 京セラミタ株式会社 | Single layer type electrophotographic photosensitive member and image forming apparatus using the same |
| JP2002116565A (en) * | 2000-10-11 | 2002-04-19 | Kyocera Mita Corp | Electrophotographic photoreceptor |
| US20030211413A1 (en) * | 2002-05-10 | 2003-11-13 | Xerox Corporation. | Imaging members |
| US7291430B2 (en) * | 2002-07-02 | 2007-11-06 | Xerox Corporation | Imaging members |
| JP2004262813A (en) * | 2003-02-28 | 2004-09-24 | Kyocera Mita Corp | Naphthalenetetracarboxylic acid diimide derivative and electrophotographic photoreceptor using the same |
| JP2007212798A (en) * | 2006-02-09 | 2007-08-23 | Kyocera Mita Corp | Electrophotographic photoreceptor, and image forming apparatus |
| JP2009128717A (en) * | 2007-11-26 | 2009-06-11 | Kyocera Mita Corp | Single-layer electrophotographic photoreceptor and image forming apparatus |
| JP2009128716A (en) * | 2007-11-26 | 2009-06-11 | Kyocera Mita Corp | Single-layer electrophotographic photoreceptor and image forming apparatus |
| JP5197417B2 (en) * | 2009-02-05 | 2013-05-15 | 京セラドキュメントソリューションズ株式会社 | Electrophotographic photosensitive member and image forming apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001242656A (en) * | 2000-02-25 | 2001-09-07 | Kyocera Mita Corp | Electrophotographic photoreceptor |
| JP2001255678A (en) * | 2000-03-10 | 2001-09-21 | Kyocera Mita Corp | Image forming device using positive electrification type monolayer electrophotographic photoreceptor |
| CN101082784A (en) * | 2006-06-02 | 2007-12-05 | 夏普株式会社 | Electro-photographic photoconductor and image forming apparatus |
| JP2011158711A (en) * | 2010-02-01 | 2011-08-18 | Mitsubishi Chemicals Corp | Electrophotographic photoreceptor, image forming apparatus, and electrophotographic cartridge |
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| CN103901741A (en) | 2014-07-02 |
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