CN102902171A - Electrophotographic photoreceptor using bis (triphenylamine) derivatives and imaging forming apparatus - Google Patents
Electrophotographic photoreceptor using bis (triphenylamine) derivatives and imaging forming apparatus Download PDFInfo
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- CN102902171A CN102902171A CN2012102581429A CN201210258142A CN102902171A CN 102902171 A CN102902171 A CN 102902171A CN 2012102581429 A CN2012102581429 A CN 2012102581429A CN 201210258142 A CN201210258142 A CN 201210258142A CN 102902171 A CN102902171 A CN 102902171A
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- photoreceptor
- triphenylamine
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- 108091008695 photoreceptors Proteins 0.000 title abstract description 94
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- AZQWKYJCGOJGHM-UHFFFAOYSA-N para-benzoquinone Natural products O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 1
- 150000003009 phosphonic acids Chemical class 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000003495 polar organic solvent Substances 0.000 description 1
- 229920003227 poly(N-vinyl carbazole) Polymers 0.000 description 1
- 229920002285 poly(styrene-co-acrylonitrile) Polymers 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920001230 polyarylate Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- YARNEMCKJLFQHG-UHFFFAOYSA-N prop-1-ene;styrene Chemical compound CC=C.C=CC1=CC=CC=C1 YARNEMCKJLFQHG-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- DNXIASIHZYFFRO-UHFFFAOYSA-N pyrazoline Chemical compound C1CN=NC1 DNXIASIHZYFFRO-UHFFFAOYSA-N 0.000 description 1
- RQGPLDBZHMVWCH-UHFFFAOYSA-N pyrrolo[3,2-b]pyrrole Chemical compound C1=NC2=CC=NC2=C1 RQGPLDBZHMVWCH-UHFFFAOYSA-N 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
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- 229940014800 succinic anhydride Drugs 0.000 description 1
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- 239000004094 surface-active agent Substances 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- NLDYACGHTUPAQU-UHFFFAOYSA-N tetracyanoethylene Chemical group N#CC(C#N)=C(C#N)C#N NLDYACGHTUPAQU-UHFFFAOYSA-N 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium(II) oxide Chemical compound [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- 150000003852 triazoles Chemical class 0.000 description 1
- AAAQKTZKLRYKHR-UHFFFAOYSA-N triphenylmethane Chemical compound C1=CC=CC=C1C(C=1C=CC=CC=1)C1=CC=CC=C1 AAAQKTZKLRYKHR-UHFFFAOYSA-N 0.000 description 1
- 229940124543 ultraviolet light absorber Drugs 0.000 description 1
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Images
Landscapes
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Photoreceptors In Electrophotography (AREA)
- Cleaning In Electrography (AREA)
Abstract
The invention provides an electrophotographic photoreceptor using bis (triphenylamine) derivatives and an imaging forming apparatus provided with a DC voltage application type electrification portion having a contact charging manner. The electrophotographic photoreceptor is of positively charged single-layer type of the bis (triphenylamine) derivatives represented in the formula (1). By using the bis (triphenylamine) derivatives, the electrophotographic photoreceptor producing no transfer memories is provided. Furthermore, the image forming apparatus can continuously provide good images because of being provided with such an electrophotographic photoreceptor to serve as an image bearing body.
Description
Technical field
The present invention relates to contain the positively charged mono-layer electronic photographic photoreceptor of two (triphenylamine) derivants and possess above-mentioned Electrophtography photosensor as the image processing system of image carrier.
Background technology
The Electrophtography photosensor that the image processing system of electrofax mode possesses has inorganic photoreceptor and Organophotoreceptor, inorganic photoreceptor possesses the photographic layer that is made of inorganic material such as selenium, amorphous silicons, and Organophotoreceptor possesses the photographic layer that mainly is made of organic materials such as resin glue, charge generating, charge transport agent.And, among these photoreceptors owing to compare Organophotoreceptor with inorganic photoreceptor and make easily, can from the material of relative broad range, select photographic layer material, design the degree of freedom height and be used widely.
At first, as Organophotoreceptor, the known single-layer type Organophotoreceptor that possesses the photographic layer that in same layer, comprises charge generating and charge transport agent.Known with compare with the laminated-type Organophotoreceptor of charge transport layer (containing the charge transport agent) at conductive base upper strata piezoelectricity lotus genetic horizon (containing charge generating), simple in structure and the easy manufacturing of layer of above-mentioned single-layer type Organophotoreceptor can suppress the generation of paint film defect simultaneously.
In using the image processing system of this Electrophtography photosensor, implement to comprise following 1)～5) image formation process of operation.
1) makes the operation of the surface charging of Electrophtography photosensor
2) make charged Electrophtography photosensor face exposure, thereby form the operation of electrostatic latent image
3) under the state that applies the development bias voltage, electrostatic latent image is carried out the operation of toner development
4) toner image that forms is transferred to the operation of transfer printing body by the discharged-area development mode
5) carry out the operation of heat fixer to being transferred to toner image on the transfer printing body
In this image formation process, find, owing to make Electrophtography photosensor rotate to use, the current potential (bright current potential) of the part that therefore is exposed in last circulation is residual, even through the charged operation of next circulation, the phenomenon of the hot-line electrical potential (dark potential) that can not obtain expecting in above-mentioned part (transfer printing storage (translocation write メ モ リ-)).So the image color that produces the transfer printing part of storing and the part that does not produce the transfer printing storage changes, and has the problem that is difficult to obtain good image.
On the other hand, mono-layer electronic photographic photoreceptor has positively charged type and electronegative type, the charged mode of Electrophtography photosensor has contact electrification mode and the charged mode of noncontact, when making the surface charging of Electrophtography photosensor, consider from producing hardly oxidizing gas aspects such as Electrophtography photosensor life-span and office environment being brought dysgenic ozone, preferably the contact electrification mode is combined to use with the positively charged mono-layer electronic photographic photoreceptor.
Yet, in the contact electrification mode, because region of discharge is narrow, therefore to compare with the charged mode of noncontact of using charger etc., charged ability is difficult to make Electrophtography photosensor surface uniform ground charged.Therefore, in the contact electrification mode, in order to improve the charged homogeneity on Electrophtography photosensor surface, Electrophtography photosensor is applied the overlapping overlapping voltage that forms of alternating voltage or alternating voltage and DC voltage.Yet, in this case, although can eliminate charged inhomogeneity problem, have the problem of the hot-line electrical potential reduction on Electrophtography photosensor surface owing to the negative composition of alternating voltage.
Therefore, consider from making Electrophtography photosensor surface charging to the viewpoint of desired current potential, in the contact electrification mode, apply DC voltage more.Yet, in above-mentioned charged method, although can make the Electrophtography photosensor surface charging to desired current potential, because the current potential on Electrophtography photosensor surface is still unstable, have the problem that produces easily the transfer printing storage.
Consider from this reason, in the image processing system that possesses the electro-mechanical part that applies DC voltage by the contact electrification mode, when using the positively charged mono-layer electronic photographic photoreceptor, be very easy to produce the transfer printing storage, it is bad to produce easily the images such as ghost image that the generation of transfer printing storage brings.
In order to suppress the generation of transfer printing storage, it is effective using the charge transport agent of charge delivery capability excellence.Concrete example as the charge transport agent of above-mentioned charge delivery capability excellence, patent documentation 1(Japanese kokai publication hei 07-244390 number) discloses two (triphenylamine) derivants in, yet even used this pair (triphenylamine) derivant also to be difficult to suppress fully the generation of transfer printing storage.
Summary of the invention
The object of the invention is to, provide to be suppressed to produce the positively charged mono-layer electronic photographic photoreceptor transfer printing storage, that contain two (triphenylamine) derivants in the image processing system that the DC voltage that possesses the contact electrification mode applies the type electro-mechanical part.In addition, the invention provides and possess above-mentioned positively charged mono-layer electronic photographic photoreceptor as the image processing system of image carrier.
The mono-layer electronic photographic photoreceptor that a scheme of the present invention relates to is characterised in that photographic layer contains two (triphenylamine) derivants of following general formula (1) expression.
[in the general formula (1), R
1～R
6Can be identical or different, be that carbon number is 1～4 alkyl, m, n, l, p, q and r are 0～3 integer].
Contain the mono-layer electronic photographic photoreceptor of this pair (triphenylamine) derivant by use, can suppress to possess the generation of the transfer printing storage in the image processing system of electro-mechanical part of contact electrification mode.
The image processing system that a scheme of the present invention relates to is characterised in that to possess:
Image carrier;
Electro-mechanical part, described electro-mechanical part makes the surface charging of described image carrier;
Exposure section, described exposure section makes the face exposure of charged described image carrier, thereby forms electrostatic latent image on the surface of described image carrier;
Development section, described development section is toner image with described latent electrostatic image developing; With
Transfer section, described transfer section is transferred to transfer printing body with described toner image from described image carrier,
Described image carrier is for using the mono-layer electronic photographic photoreceptor of described two (triphenylamine) derivants.
According to this technical scheme, discovery can obtain suppressing the stable image processing system of the generation of transfer printing storage.
Further other purpose of the present invention, the concrete advantage that obtains according to the present invention can be clearer and more definite by the embodiment of following explanation.
Description of drawings
Fig. 1 is the figure of the structure of expression positively charged mono-layer electronic photographic photoreceptor of the present invention.
Fig. 2 is the structure diagram of an example of expression image processing system of the present invention.
Fig. 3 stores the figure of the relation between the absolute value of current potential for dipole moment and the transfer printing of expression cavity conveying agent of the present invention.
Embodiment
Below, embodiments of the present invention are described, but the invention is not restricted to these embodiments.
[the first embodiment]
The first embodiment relates to photographic layer and contains two (triphenylamine) derivants of following general formula (1) expression as the positively charged mono-layer electronic photographic photoreceptor of cavity conveying agent.
(in the general formula (1), R
1～R
6Can be identical or different, be that carbon number is 1～4 alkyl, m, n, l, p, q and r are 0～3 integer).
As shown in Figure 1, the positively charged mono-layer electronic photographic photoreceptor of the first embodiment possesses conductive base 12 and the photographic layer 14 of the individual layer that contains charge generating, cavity conveying agent, electron transporting agent and resin glue that forms at conductive base 12.And, if the positively charged mono-layer electronic photographic photoreceptor possesses conductive base 12 and photographic layer 14, then without particular limitation of.Specifically, for example the positively charged mono-layer electronic photographic photoreceptor 10 shown in Fig. 1 (a) is such, can on conductive base 12, directly possess photographic layer 14, positively charged mono-layer electronic photographic photoreceptor 10 ' that also can be shown in Fig. 1 (b) possesses middle layer 16 like that between conductive base 12 and photographic layer 14.In addition, shown in Fig. 1 (a) or Fig. 1 (b), photographic layer 14 can become outermost layer and expose, positively charged mono-layer electronic photographic photoreceptor 10 that also can be shown in Fig. 1 (c) " like that, possess protective seam 18 at photographic layer 14.
Below, for the positively charged mono-layer electronic photographic photoreceptor, successively conductive base and photographic layer are described.
[conductive base]
For conductive base, if can be used as the conductive base of positively charged mono-layer electronic photographic photoreceptor, then without particular limitation of.Specifically, can enumerate the conductive base etc. that consists of at least surface element with the material with electric conductivity.That is, the conductive base that the material with electric conductivity of specifically for example can serving as reasons forms, or the conductive base that forms with the surface of the material plastic covering material with electric conductivity etc.In addition, the material that has electric conductivity can be enumerated such as aluminium, iron, copper, tin, platinum, silver, vanadium, molybdenum, chromium, cadmium, titanium, nickel, palladium, indium, stainless steel, brass etc.In addition, as the material with electric conductivity, can use a kind of material with electric conductivity, also two or more combinations of materials with electric conductivity can be used in addition, such as using in modes such as alloys.In addition, as conductive base, in above-mentioned giving an example, preferably formed by aluminum or aluminum alloy.Thus, can provide the positively charged mono-layer electronic photographic photoreceptor that can form better image.Think that this is because due to the migration of electric charge from photographic layer to conductive base well.
The shape of conductive base can suitably be selected according to the structure of the image processing system of usefulness, such as the matrix that can preferably use sheet, drum type etc.In addition, the thickness of conductive base can suitably be selected according to above-mentioned shape.
[photographic layer]
The photographic layer that possesses as the positively charged mono-layer electronic photographic photoreceptor, if comprise at least the photographic layer of the single layer structure of charge generating, cavity conveying agent and resin glue, and the cavity conveying agent is two (triphenylamine) derivants of following general formula (1) expression, then without particular limitation of.
(in the general formula (1), R
1～R
6Can be identical or different, be that carbon number is 1～4 alkyl, m, n, l, p, q and r are 0～3 integer).
The photographic layer of the positively charged mono-layer electronic photographic photoreceptor of the first embodiment, owing in the middle of the cavity conveying agent of charge delivery capability excellence, contain two (triphenylamine) derivants of general formula (1) expression as the cavity conveying agent, therefore can be suppressed at image and form the transfer printing storage that produces in the transfer printing process of operation.
Below, image is formed the transfer printing storage that produces in the operation describe.
Usually, utilize the image formation operation of electrofax mode to comprise charged operation, exposure process, developing procedure, transfer printing process, remove electrician's order etc.In initial operation, be in the charged operation, charged to certain potentials by making as the surface uniform ground of the positively charged mono-layer electronic photographic photoreceptor on image carrier surface, thus have positive electric charge.Then, in exposure process, the surface of charged positively charged mono-layer electronic photographic photoreceptor to certain potentials is exposed, and forms thus electrostatic latent image.
Further, in developing procedure, give toner by the part to above-mentioned exposure, can form toner image thus, electrostatic latent image is by visual.And in transfer printing process, the toner image that is formed on the surface of positively charged mono-layer electronic photographic photoreceptor is transferred to middle transfer body.At this, above-mentioned toner image is transferred in the operation of above-mentioned middle transfer body, this middle transfer body is applied bias voltage with the negative polarity of the opposite charge polarity of positively charged mono-layer electronic photographic photoreceptor.
When above-mentioned middle transfer body was applied the bias voltage of negative polarity, the part of above-mentioned exposure was owing to have the toner that consists of toner image on its surface, also can keep polarity (positive polarity) when charged even therefore apply the bias voltage of above-mentioned negative polarity.Yet unexposed part is not owing to have the toner that consists of toner image on its surface, therefore because the bias voltage of negative polarity can have the electric charge with charged opposite polarity (negative polarity).The part of the exposure on the positively charged mono-layer electronic photographic photoreceptor and unexposed part have the current potential of opposed polarity as a result, the reason that the transfer printing storage produced when the image after this potential difference (PD) becomes formed.
Therefore, in the present invention, become the effect of the cavity conveying agent of general formula (1) expression that the electric charge of negative polarity of above-mentioned unexposed portion of the reason of transfer printing storage contains by photographic layer, above-mentioned potential difference (PD) is disappeared, suppress the transfer printing storage that produces in the transfer printing process.
Below, to describing as charge generating, cavity conveying agent, electron transporting agent, resin glue and the adjuvant of the composition that consists of photographic layer and positively charged mono-layer electronic photographic photoreceptor and manufacture method thereof.
(charge generating)
If charge generating can be used as the charge generating of positively charged mono-layer electronic photographic photoreceptor use then without particular limitation of.Specifically, can enumerate for example X-type metal-free phthalocyanine (X-H of following formula (I) expression
2Pc), Y-shaped oxygen titanium phthalocyanines (Y-TiOPc), perylene pigment, disazo pigment, dithione pyrrolopyrrole (dithioketo-pyrrolopyrrole) pigment, without metal naphthalene phthalocyanine pigment, metal naphthalene phthalocyanine pigment, square acid color, trisazo pigment, indigo pigment, azulenes
Pigment (azulenium pigment), phthalocyanine pigments, the powder of the inorganic light conductive materials such as selenium, selenium-tellurium, selenium-arsenic, cadmium sulfide, amorphous silicon, pyrans
Salt, anthanthrene quinones pigment, triphenylmethane pigment, intellectual circle's class pigment, toluene amine pigment, pyrazolines pigment and quinacridine ketone pigment etc.
In addition, charge generating can be separately with or make up two or more the use, in desired zone, to have absorbing wavelength.Further, particularly for the image processing system of the digit optical systems such as the laser beam printer that uses the light source such as semiconductor laser or facsimile recorder, the positively charged mono-layer electronic photographic photoreceptor that need to the wavelength region may more than 700nm has light sensitivity is so preferably in above-mentioned each charge generating use phthalocyanine pigments such as metal-free phthalocyanine, titanyl phthalocyanine.And, to the crystal formation of above-mentioned phthalocyanine pigment without particular limitation of, can use the phthalocyanine pigment of various crystal formations.In addition, image processing system for the simulated optical systems such as electrostatic duplicating machine that use the white light sources such as halide lamp, the positively charged mono-layer electronic photographic photoreceptor that need to have in visibility region light sensitivity, therefore such as perylene pigment, disazo pigment etc. of preferred use.
(cavity conveying agent)
The cavity conveying agent is two (triphenylamine) derivants of following general formula (1) expression.
(in the general formula (1), R
1～R
6Can be identical or different, be that carbon number is 1～4 alkyl, m, n, l, p, q and r are 0～3 integer).
R in the general formula (1)
1~ R
6Concrete example be methyl, ethyl, n-pro-pyl, isopropyl, normal-butyl, isobutyl, sec-butyl, the tert-butyl group.In general formula (1), m, n, l, p, q and the r sum that is equivalent to the alkyl number that two (triphenylamine) derivants have is preferably the integer below 10, more preferably 1 ~ 4 integer.When two (triphenylamine) derivants of general formula (1) expression have alkyl number in the above-mentioned scope, by selecting number and the kind of alkyl, adjust easily the value of the dipole moment of two (triphenylamine) derivants described later.In addition, when the alkyl number was too much, the molecule quantitative change of two (triphenylamine) derivant was large, in order to obtain desired effect, sometimes needed a large amount of two (triphenylamine) derivants.
It is below 1.20 that the value of the dipole moment that the structural optimization PM3 parameter, that utilize semiempirical molecular orbital to calculate calculates is preferably used in the cavity conveying agent.In two (triphenylamine) derivants of general formula (1) expression, when using the compound of dipole moment of above-mentioned value, suppress easily the generation of transfer printing storage.
In addition, the cavity conveying agent more preferably the value of above-mentioned dipole moment be cavity conveying agent below 1.00.In two (triphenylamine) derivants of general formula (1) expression, when using the compound of dipole moment of above-mentioned value, can suppress especially well the generation of transfer printing storage, therefore, form easily the bad good images of image such as not having ghost image.
With the PM3 parameter, utilize structural optimization calculated example that semiempirical molecular orbital calculates as being undertaken by MOPAC97 program etc.
In the triphenylamine derivative of general formula (1) expression, as the concrete example of preferred compound, can enumerate following HTM-1 ~ HTM-5.And, be attached to the calculated value of the dipole moment that the numerical value of the bottom right of structural formula of compound obtains for the use MOPAC97 program of each compound.
These compounds are thought of as preferred compound because the calculated value of dipole moment is below 1.00 from the generation aspect that can suppress especially well the transfer printing storage.
The preparation method of the compound of mutual-through type (1) expression without particular limitation of.Preparation method as the compound of general formula (1) expression, can enumerate and for example make 1 of general formula (2), the triphenylamine derivative of the two phosphonic acids tetra-ethyl esters of 2-xylylene and general formula (3) expression reacts to prepare the compound of general formula (4) expression, then, make the following method of the compound of general formula (4) expression and the triphenylamine derivative reaction that general formula (5) represents.And, for general formula (3) ~ (5), R
1~ R
6, m, n, l, p, q be identical with general formula (1) with r.
If the cavity conveying agent in the scope that does not hinder the object of the invention, then except two (triphenylamine) derivants of general formula (1) expression, can also contain the various compounds that are used as the cavity conveying agent in Electrophtography photosensor all the time.As the cavity conveying agent that can use with the compound of general formula (1) expression, can enumerate for example benzidine derivative, 2,5-two (4-methylamino phenyl)-1,3,4-
Diazole etc.
Diazoles compound, 9-(4-diethylamino styryl) carbazole compounds such as styrene compound, Polyvinyl carbazole, organopolysilane compound, the 1-phenyl-3-(such as anthracene be to dimethylaminophenyl) triphenylamine compound outside the compound of the pyrazoline compounds such as pyrazoline, hydrazone compounds, general formula (1) expression, Benzazole compounds,
Azole compounds, different
The nitrogenous ring type compounds such as azole compounds, thiazole compound, thiadiazole compound, glyoxaline compound, pyrazole compound, triazole class compounds, fused-polycyclic compounds etc.
(electron transporting agent)
If electron transporting agent in the scope that does not hinder the object of the invention, then without particular limitation of, can from the electron transporting agent of all the time the photographic layer of positively charged mono-layer electronic photographic photoreceptor, using, suitably select to use.Concrete example as preferred electron transporting agent, can enumerate naphthoquinone derivatives, diphenoquinone, anthraquinone derivative, azo quinone (azoquinone) derivant, the nitroanthraquinone derivant, the quinone derivatives such as dinitroanthraquinone derivant, malononitrile derivant, thiapyran derivant, the trinitro-thioxanthone derivates, 3,4,5,7-tetranitro-9-Fluorenone derivant, the dinitro anthracene derivant, dinitro acridine derivatives, tetracyanoethylene, 2,4,8-trinitro-thioxanthones, dinitro benzene, the dinitro anthracene, the dinitro acridine, succinic anhydride, maleic anhydride and dibromomaleic acid acid anhydride etc.Among them, quinone derivative more preferably.
(resin glue)
If resin glue can as the resin glue that contains in the photographic layer of positively charged mono-layer electronic photographic photoreceptor then without particular limitation of.Concrete example as the resin that is preferably used as resin glue, can enumerate polycarbonate resin, styrene resin, Styrene-Butadiene, styrene-acrylonitrile copolymer, styrene-maleic acid copolymer, the 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 resin, ketone resin, polyvinyl butyral resin, polyether resin, the thermoplastic resins such as vibrin, organic siliconresin, epoxy resin, phenolics, carbamide resin, melamine resin, the thermoset resins such as other bridging property thermoset resins, Epocryl, the light-cured resins such as polyurethane acrylic emulsion copolymerization resin.These resins can use separately, also two or more use capable of being combined.
Among these resins, from the viewpoint of the photographic layer of the balance excellence that obtains processability, mechanical characteristic, optical characteristic, mar proof, the more preferably polycarbonate resins such as bisphenol z-polycarbonate resin, bisphenol Z C type polycarbonate resin, bisphenol-c type polycarbonate resin and bisphenol A polycarbonate resin.
(adjuvant)
Not bringing the electrofax characteristic in the dysgenic scope, except charge generating, cavity conveying agent, electron transporting agent and resin glue, also can comprise various adjuvants in the photographic layer of positively charged mono-layer electronic photographic photoreceptor.The adjuvant that can be coupled in the photographic layer can be enumerated anti-deterioration agent, softening agent, plastifier, surface modifier, extender, thickening agent, dispersion stabilizer, wax, acceptor, donor, surfactant and levelling agents etc. such as antioxidant, radical scavenger, singlet quencher (singlet quencher), ultraviolet light absorber.
(manufacture method of positively charged mono-layer electronic photographic photoreceptor)
If the manufacture method of positively charged mono-layer electronic photographic photoreceptor in the scope that does not hinder the object of the invention, then without particular limitation of.The preference of the manufacture method of positively charged mono-layer electronic photographic photoreceptor can be enumerated the method for the coating fluid formation photographic layer that photosensitive coated layer is used on conductive base.Specifically, with the dissolving such as charge generating, cavity conveying agent, electron transporting agent, resin glue and the various adjuvants that add as required or be dispersed in the coating fluid that forms in the solvent and be coated on the conductive base, carry out drying, can make photographic layer thus.To coating process without particular limitation of, can enumerate such as use the rotary coating machine, apply the machine of smearing, the method for flush coater, coiling rod coating machine, dip coater, scraper etc.In addition, the drying means of filming that is formed on the conductive base can be enumerated such as method of carrying out heated-air drying under 80～150 ℃, 15～120 minutes condition etc.
In the positively charged mono-layer electronic photographic photoreceptor, each content of charge generating, cavity conveying agent, electron transporting agent and resin glue can suitably be selected, without particular limitation of.Specifically, for example the content of charge generating is preferably 0.1～50 mass parts with respect to resin glue 100 mass parts, more preferably 0.5～30 mass parts.The content of electron transporting agent is preferably 5～100 mass parts with respect to resin glue 100 mass parts, more preferably 10～80 mass parts.The content of cavity conveying agent is preferably 5～500 mass parts with respect to resin glue 100 mass parts, more preferably 25～200 mass parts.In addition, the total amount of cavity conveying agent and electron transporting agent, be the content of charge transport agent with respect to resin glue 100 mass parts, be preferably 20～500 mass parts, more preferably 30～200 mass parts.
The photographic layer thickness of positively charged mono-layer electronic photographic photoreceptor, as long as can fully play the effect of photographic layer, then without particular limitation of.Specifically, for example be preferably 5～100 μ m, more preferably 10～50 μ m.
As long as the contained solvent of the coating fluid that photographic layer is used is solubilized or disperse to consist of each composition of photographic layer, then without particular limitation of.Specifically, can enumerate the alcohols such as methyl alcohol, ethanol, isopropyl alcohol, butanols; The aliphatic hydrocarbons 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, MEK, methylisobutylketone, 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, also two or more use capable of being combined.
The positively charged mono-layer electronic photographic photoreceptor can be used as the image carrier that the DC voltage that possesses the contact electrification mode described later applies the image processing system of type electro-mechanical part.Thus, even if be that positively charged, charged mode are to apply under the condition of easy generation transfer printing storage of contact electrification mode of DC voltage in the charged polarity of mono-layer electronic photographic photoreceptor, also can suppress the transfer printing storage, can suppress thus the bad generation of image.
[the second embodiment]
The second embodiment relates to image processing system, possesses image carrier; Electro-mechanical part, this electro-mechanical part makes the surface charging of image carrier; Exposure section, this exposure section makes the face exposure of charged image carrier, thereby forms electrostatic latent image on the surface of image carrier; Development section, this development section is toner image with latent electrostatic image developing; And transfer section, this transfer section is transferred to transfer printing body with toner image from image carrier, uses the band in the first embodiment just being with mono-layer electronic photographic photoreceptor as image carrier.
In addition, image processing system of the present invention forms any of device, color image forming device applicable to monochrome image, but describes at this color image forming device to the series system of use multiple color toner.
And, in order on each surface, to form toner image by the toner of different colours respectively, below the band that possesses of explanation just possesses a plurality of image carriers and a plurality of development section with the image processing system of mono-layer electronic photographic photoreceptor, these a plurality of image carriers are on prescribed direction and establish, these a plurality of development sections have and each image carrier subtend configuration, carry from the teeth outwards and transport toner, the toner that transports is supplied with respectively the developer roll on each image carrier surface, and each image carrier uses respectively the band in the first embodiment just being with mono-layer electronic photographic photoreceptor.
Fig. 2 possesses band just with the synoptic diagram of the color image forming device structure of the series system of mono-layer electronic photographic photoreceptor for expression.At this, 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 the sheet feed section 2 of supplying with paper using P, transport the paper using P that supplied with by this sheet feed section 2 and will based on the toner image transfer printing of view data etc. on this paper using P image forming part 3 and to utilizing these image forming part 3 transfer printings to implement to be fixed on the photographic fixing section 4 that the photographic fixing on the paper using P is processed in the unfixed toner image on the paper using P.Further, being provided with output on equipment body 1a utilizes photographic fixing section 4 to implement the paper delivery section 5 of the paper using P of photographic fixing processing.
In addition, sheet feed section 2 further comprises the manual pallet (not shown) of the left surface that is installed in equipment body 1a shown in Figure 2 and gets paper bowl 127.This is got paper bowl 127 and takes out the paper using P that is positioned on the manual pallet.Utilization is got paper using P that paper bowl 127 takes out and is passed out to by paper feed roller 123,125 and use paper-delivering path, supplies to image forming part 3 by resistance roller 126 with the timing of stipulating.
Image formation unit 7 comprises black unit 7K, the yellow unit 7Y of using, cyan unit 7C and the magenta unit 7M that sets successively towards the downstream from upstream side (being the right side among Fig. 2).Each unit 7K, 7Y, 7C and 7M middle position separately dispose can rotate along arrow (clockwise) direction as the positively charged mono-layer electronic photographic photoreceptor 37(of image carrier below be photoreceptor 37).And, around each photoreceptor 37, dispose respectively successively electro-mechanical part 39, exposure section 38, development section 71, cleaning section (not shown) and the electric section (not shown) that removes as required from the rotation direction upstream side.And photoreceptor 37 uses the positively charged mono-layer electronic photographic photoreceptor of the Electrophtography photosensor that relates to as the first embodiment.
Electro-mechanical part 39 makes along the side face of the photoreceptor 37 of direction of arrow rotation charged equably.Concrete example as electro-mechanical part 39, can enumerate in charged roller or with side face (surface) charged roller charged, that possess the way of contact that makes photoreceptor 37 under brush etc. and the state that photoreceptor 37 contacts with the electro-mechanical part of brush etc., the preferred electro-mechanical part that possesses charged roller that uses.
The electro-mechanical part that possesses the charged roller of the way of contact under charged roller and state that photoreceptor 37 contacts, rotates drivenly, makes the side face (surface) of photoreceptor 37 charged.
As this charged roller, can enumerate roller that is consisted of by resin such as surface element at least etc.Specifically, can enumerate with state that photoreceptor 37 contacts under, be subordinated to the rotation of photoreceptor 37 and rotate, possess the cored bar that supported by axle rotationally, be formed on the resin bed on the cored bar and cored bar executed charged roller of alive voltage application portion etc.Possess the electro-mechanical part of this charged roller by by voltage application portion cored bar being applied voltage, can make the surface charging by the photoreceptor 37 of resin bed contact.
To the especially restriction of voltage that charged roller is applied by voltage application portion, but comparing when applying alternating voltage or alternating voltage with the overlapping overlapping voltage that forms of DC voltage, preferably only is DC voltage.When charged roller is only applied DC voltage, have the trend of the wear extent minimizing of photographic layer, can form suitable image.
The DC voltage that the positively charged mono-layer electronic photographic photoreceptor is applied is preferably 1000～2000V, and more preferably 1200～1800V is particularly preferably 1400～1600V.
Image processing system comprises the electro-mechanical part that applies DC voltage that possesses charged roller and during as the positively charged mono-layer electronic photographic photoreceptor of image carrier, there is the trend that produces especially easily the transfer printing storage, yet when using positively charged mono-layer electronic photographic photoreceptor that the first embodiment relates to as image carrier, can suppress the transfer printing storage, suppress the bad generation of image.
In addition, consist of the resin of the resin bed of charged roller, if can make the side face of photoreceptor 37 charged well, then without particular limitation of.The concrete example of the resin that uses in the resin bed can be enumerated organic siliconresin, urethane resin, silicon modified resin etc.In addition, can contain inorganic filling material in the resin bed.
Driven roller 33 carries out rotating drive by drive sources such as stepping motors, be provided for making the driving force of intermediate transfer belt 31 non junctions rotation, driven voller 34, backing roll 35 and primary transfer roller 36 are rotated freely and arrange, the driven rotation along with the non junction rotation of the intermediate transfer belt 31 that is undertaken by driven roller 33.The active rotation of these rollers 34,35,36 response driven rollers 33 is carried out driven rotation by intermediate transfer belt 31, and middle transfer belt 31 is supported.
And, process by the photographic fixing that image forming part 3 utilizes transferred image that secondary transfer roller 32 is transferred to paper using P to be undertaken by the heating of this paper using P by between warm-up mill 41 and the backer roll 42 time, by photographic fixing to paper using P.And the paper using P that has implemented the photographic fixing processing outputs to paper delivery section 5.In addition, in the color printer 1 of present embodiment, the suitable position between photographic fixing section 4 and paper delivery section 5 is equipped with and transports roller 6.
Form operation by above-mentioned image, color printer 1 forms image at paper using P, the image processing system of above-mentioned series system is owing to possess positively charged mono-layer electronic photographic photoreceptor in the first embodiment as image carrier, even if when charged mode, the image carrier of the contact electrification mode that applies DC voltage is the condition of easy generation transfer printing storage of positively charged mono-layer electronic photographic photoreceptor, also be difficult for producing the transfer printing storage, therefore can obtain to form the image processing system of suitable images.
[embodiment]
By the following examples the present invention is carried out more specific description.And the present invention is not implemented example and limits.
In embodiment and comparative example, use following cavity conveying agent (HTM-1 ~ HTM-9) and electron transporting agent (ETM-1 ~ ETM-4).And the numerical value of the bottom right of cavity conveying agent is the value of the dipole moment that calculates by the MOPAC97 program.
<HTM-1~HTM-9>
<ETM-1~ETM-4>
[embodiment 1]
With metal-free phthalocyanine 5 mass parts, cavity conveying agent (HTM-1) 50 mass parts, electron transporting agent (ETM-1) 35 mass parts, viscosity average molecular weigh 50,000 bisphenol z-polycarbonate resin 100 mass parts and tetrahydrofuran 800 mass parts join in the bowl mill, carry out 50 hours mixing, dispersion treatment, the coating fluid that the preparation photographic layer is used.With dip coating the coating fluid that obtains is coated on the conductive substrate, and removed tetrahydrofuran in 40 minutes by filming 100 ℃ of lower processing, thereby obtain possessing the positively charged mono-layer electronic photographic photoreceptor of the photographic layer of 30 μ m thickness.
[embodiment 2 ~ 8 and comparative example 1 ~ 7]
The kind that table 1 is put down in writing is changed in cavity conveying agent (HTM) and electron transporting agent (ETM), in addition carried out similarly to Example 1, obtain the positively charged mono-layer electronic photographic photoreceptor.
The positively charged mono-layer electronic photographic photoreceptor that will obtain in embodiment and comparative example is assembled to electro-mechanical part is adapted as on the printer (FS-5300DN, Kyoji, Meida K.K's system) of the charged roller that applies DC voltage, and the difference of the blank sheet of paper section voltage of the blank sheet of paper section current potential when closing transfer bias when opening transfer bias is estimated as the transfer printing storage.In addition, carry out durable printing in 1 hour after, observe printing images, estimate having or not the bad generation of image.In the evaluation of image, to not observe the bad situation of image as ◎, the state that the physical control piece (ベ タ パ Star チ) of one side 10mm is occurred in the ghost image mode in shadow tone section is as zero, when above-mentioned physical control piece is occurred in the ghost image mode on one side the letter of 3mm with the ghost image mode occur, but the state that can not clearly read its literal as △, when above-mentioned physical control piece is occurred in the ghost image mode on one side the letter of the 3mm state that occurs, clearly read its literal in the ghost image mode as *.The evaluation result of transfer printing storage and image is as shown in table 1.
[table 1]
According to embodiment 1 ~ embodiment 8 as can be known, (HTM-1 ~ HTM-5) is as the positively charged mono-layer electronic photographic photoreceptor of the photographic layer of cavity conveying agent if use and to possess two (triphenylamine) derivants of containing general formula (1) expression, even for the electro-mechanical part of the contact electrification mode that possesses the DC voltage of applying, possess the positively charged mono-layer electronic photographic photoreceptor as the image processing system of the easy generation transfer printing storage of image carrier, also can suppress the transfer printing storage, form suitable image.
In addition, the calculated value of the dipole moment of HTM-1 ~ HTM-5 all is below 1.00, therefore in embodiment 1 ~ embodiment 8, can suppress well transfer printing storage current potential, can form and not observe the bad good image of image.
On the other hand, according to comparative example 1 ~ comparative example 7 as can be known, the positively charged mono-layer electronic photographic photoreceptor that use contains the cavity conveying agent outside two (triphenylamine) derivants of general formula (1) expression is during as image carrier, at the electro-mechanical part of the contact electrification mode that possesses the DC voltage of applying, possess in the image processing system of positively charged mono-layer electronic photographic photoreceptor as image carrier, can not suppress the transfer printing storage, it is bad to produce easily image.
For embodiment 1 ~ embodiment 8 and comparative example 1 ~ comparative example 7, the relation between the absolute value of dipole moment and transfer printing storage current potential as shown in Figure 3.In addition, for the data of embodiment 1 ~ embodiment 8, comparative example 1 and comparative example 3 ~ comparative example 7, carry out near linear that linearization obtains as shown in Figure 3.The dipole moment of cavity conveying agent surpasses in 2 the situation, because the absolute value of transfer printing storage current potential is about 90 value, therefore carries out linearization for the data of embodiment 1 ~ embodiment 8, comparative example 1 and comparative example 3 ~ comparative example 7.
According to Fig. 3 as can be known, the calculated value of the dipole moment of cavity conveying agent is lower, and the inhibition of transfer printing storage is higher.In addition, according to Fig. 3 as can be known, for two (triphenylamine) derivant, the calculated value of dipole moment surpasses 1.00 and be 1.20 when following, and the absolute value that current potential is stored in transfer printing is about 50 ~ 60V.At this moment, although because the transfer printing storage is inhibited and can suppresses the bad generation of image, because the absolute value of transfer printing storage current potential is slightly high, produce easily ghost image.
Further, according to Fig. 3 as can be known, for two (triphenylamine) derivant, the calculated value of dipole moment is 1.00 when following, and the absolute value of transfer printing storage current potential is below the 50V.At this moment, because the absolute value of transfer printing storage current potential is fully low, therefore can not produce ghost image, the picture appraisal of carrying out in an embodiment is judged to be " ◎ ".
Claims (6)
1. Electrophtography photosensor, it is characterized in that, form the photographic layer of the single-layer type comprise at least charge generating, charge transport agent and resin glue at conductive base, described photographic layer contains two (triphenylamine) derivants of following general formula (1) expression
In the general formula (1), R
1～R
6Identical or different, be that carbon number is 1～4 alkyl, m, n, l, p, q and r are 0～3 integer.
2. an Electrophtography photosensor is characterized in that, contains two (triphenylamine) derivant claimed in claim 1 as the cavity conveying agent of charge transport agent.
3. Electrophtography photosensor according to claim 2, using the value of the dipole moment of the described cavity conveying agent that the structural optimization PM3 parameter, that utilize semiempirical molecular orbital to calculate calculates is below 1.20.
4. Electrophtography photosensor according to claim 3, the value of the described dipole moment of described cavity conveying agent is below 1.00.
5. image processing system is characterized in that possessing:
Image carrier;
Electro-mechanical part, described electro-mechanical part makes the surface charging of described image carrier;
Exposure section, described exposure section makes the face exposure of charged described image carrier, thereby forms electrostatic latent image on the surface of described image carrier;
Development section, described development section is toner image with described latent electrostatic image developing; With
Transfer section, described transfer section is transferred to transfer printing body with described toner image from described image carrier,
Described image carrier is the described Electrophtography photosensor of any one in the claim 1 ~ 4.
6. image processing system according to claim 5 is characterized in that, described image carrier is the positively charged Electrophtography photosensor that possesses the single-layer type photographic layer, and described electro-mechanical part is that the DC voltage of contact electrification mode applies type.
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| JP2011-166039 | 2011-07-28 | ||
| JP2011166039A JP5538323B2 (en) | 2011-07-28 | 2011-07-28 | Positively charged single layer type electrophotographic photosensitive member and image forming apparatus |
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| CN102902171B (en) | 2017-05-03 |
| JP5538323B2 (en) | 2014-07-02 |
| JP2013029688A (en) | 2013-02-07 |
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