CN109074010A

CN109074010A - Electrophtography photosensor, handle box and image forming apparatus

Info

Publication number: CN109074010A
Application number: CN201780029473.6A
Authority: CN
Inventors: 清水智文
Original assignee: Kyocera Document Solutions Inc
Current assignee: Kyocera Document Solutions Inc
Priority date: 2016-05-23
Filing date: 2017-04-27
Publication date: 2018-12-21
Anticipated expiration: 2037-04-27
Also published as: JPWO2017203932A1; WO2017203932A1; CN109074010B; JP6593532B2

Abstract

The photosensitive layer (3) of Electrophtography photosensor (1) is the single-layer type photosensitive layer (3c) containing charge producing agent and electron transporting agent.Electron transporting agent includes the compound indicated by the following general formula (1).After photosensitive layer (3) and calcium carbonate friction, the carried charge of calcium carbonate is+7.0 μ C/g or more.In general formula (1), R₁And R₂It is respectively independent, it indicates: halogen atom, the C1-C8 alkyl with 1 or more halogen atom, the C3-C10 naphthenic base with 1 or more halogen atom, the C6-C14 aryl with 1 or more halogen atom, the C6-C14 aryl with 1 or more halogen atom and with C1-C6 alkyl or the C7-C20 aralkyl with 1 or more halogen atom.P and q is respectively independent, indicates 1 or more 5 integer below.[changing 1]

Description

Electrophtography photosensor, handle box and image forming apparatus

Technical field

The present invention relates to Electrophtography photosensor, handle box and image forming apparatuses.

Background technique

Electrophtography photosensor is used in the image forming apparatus of electrofax mode.Electrophtography photosensor has photosensitive Layer.Electrophtography photosensor for example has laminated electronic electrophotographic photoconductor and mono-layer electronic photographic photoreceptor.Laminated electronic Electrophotographic photoconductor has: the charge generation layer with charge generation function and the charge transport layer with charge transfer function come As photosensitive layer.Mono-layer electronic photographic photoreceptor has the single-layer type photosensitive layer with charge generation and charge transfer function, As photosensitive layer.

In Electrophtography photosensor documented by patent document 1, photosensitive layer is set on conductive base.Photosensitive layer is at least Contain charge producing agent, charge agent delivery, surfactant and binding resin.The hydrophobic parts of surfactant are derived from fluorine Change the structure of acryloyl derivative.

(patent document)

Patent document 1: Japanese Unexamined Patent Publication 2010-230912 bulletin

Summary of the invention

Electrophtography photosensor documented by patent document 1 can inhibit the generation of photographic fog to a certain extent.However, patent Electrophtography photosensor documented by document 1 still has room for improvement in terms of inhibition forms in image and generates white point.

For the present invention in view of above-mentioned technical problem, its purpose is to provide a kind of are able to suppress to form generation white point in image Electrophtography photosensor.It is further an object that providing can press down by having such Electrophtography photosensor System forms the handle box and image forming apparatus that white point generates in image.

Electrophtography photosensor of the invention has conductive base and photosensitive layer.The photosensitive layer is generated containing charge The single-layer type photosensitive layer of agent and electron transporting agent.The electron transporting agent includes the compound indicated by the following general formula (1).It is described After photosensitive layer and calcium carbonate friction, the carried charge of the calcium carbonate is+7.0 μ C/g or more.

[changing 1]

In the general formula (1), R₁And R₂It is respectively independent, it indicates: halogen atom, the C1-C8 with 1 or more halogen atom Alkyl, the C6-C14 aryl with 1 or more halogen atom, has 1 at the C3-C10 naphthenic base with 1 or more halogen atom A above halogen atom and the C6-C14 aryl with C1-C6 alkyl or the C7-C20 aralkyl with 1 or more halogen atom Base.P and q is respectively independent, indicates 1 or more 5 integer below.

Handle box of the invention has above-mentioned Electrophtography photosensor.

Image forming apparatus of the invention has: above-mentioned Electrophtography photosensor, electro-mechanical part, exposure portion, development section and Transfer section.The electro-mechanical part charges the surface of the Electrophtography photosensor.The exposure portion makes the electronics charged The surface of electrophotographic photoconductor exposes, and forms electrostatic latent image on the surface of the Electrophtography photosensor.It is described aobvious The latent electrostatic image developing is toner image by shadow portion.The transfer section is by the toner image from the Electrophtography photosensor It is transferred to recording medium.The toner image is transferred to the recording medium from the Electrophtography photosensor by the transfer section When, the Electrophtography photosensor is contacted with the recording medium.

(invention effect)

Electrophtography photosensor of the invention is able to suppress the generation to form white point in image.Also, processing of the invention Box and image forming apparatus are able to suppress the generation to form white point in image by having such Electrophtography photosensor.

Detailed description of the invention

Figure 1A is the cross-sectional view of an example Electrophtography photosensor involved in embodiment of the present invention.

Figure 1B is the cross-sectional view of an example Electrophtography photosensor involved in embodiment of the present invention.

Fig. 1 C is the cross-sectional view of an example Electrophtography photosensor involved in embodiment of the present invention.

Fig. 2 is used to illustrate the measurement method of the carried charge of the calcium carbonate after photosensitive layer and calcium carbonate friction.

Fig. 3 is an example structure chart for having the image forming apparatus of Electrophtography photosensor involved in embodiment of the present invention.

Specific embodiment

Hereinafter, embodiment of the present invention is described in detail.But, the present invention is not by any limit of following embodiments System.Within the scope of the purpose of the present invention, the present invention can be carried out suitably changing later implementation.In addition, for repeated explanation The case where place, there are appropriate omissions, but therefore do not limit the main idea of invention.

Hereinafter, being referred to as the compound and its derivative plus " class " after compound name sometimes.In addition, in chemical combination Name be referred to as after plus " class " come in the case where indicating polymer name, indicate the repetitive unit of polymer be originated from the compound or Its derivative of person.Also, sometimes by reaction represented by reaction equation (R-1) and (R-2) respectively be recorded as reaction (R-1) and (R-2).Sometimes compound represented by general formula (1), (2), (4), (5), (6), (A), (B) and (C) is recorded as chemical combination respectively Object (1), (2), (4), (5), (6), (A), (B) and (C).Sometimes by chemical formula (1-1)~(1-5), (2-1)~(2-3), (A- 1), (B-1)~(B-5), (CGM-1), (CGM-2), compound is recorded as compound (1- respectively represented by (E-1) and (E-2) 1)~(1-5), (2-1)~(2-3), (A-1), (B-1)~(B-5), (CGM-1), (CGM-2), (E-1) and (E-2).

Hereinafter, if without special provision, halogen atom, C1-C6 alkyl, C1-C8 alkyl, C3-C10 naphthenic base, C6- C14 aryl, C7-C20 aralkyl and C1-C6 alkoxy respectively indicate following meaning.

Halogen atom (halogen group) is for example: fluorine atom (fluorine-based), chlorine atom (chloro), bromine atom (bromo) or iodine atom (iodo).

C1-C6 alkyl is straight-chain or branched, and is unsubstituted.C1-C6 alkyl is for example: methyl, ethyl, third Base, isopropyl, normal-butyl, sec-butyl, tert-butyl, amyl, isopentyl, neopentyl or hexyl.

C1-C8 alkyl is straight-chain or branched, and is unsubstituted.C1-C8 alkyl is for example: methyl, ethyl, third Base, isopropyl, normal-butyl, sec-butyl, tert-butyl, amyl, isopentyl, neopentyl, hexyl, heptyl or octyl.

C3-C10 naphthenic base is unsubstituted.C3-C10 naphthenic base is for example: cyclopropyl, cyclobutyl, cyclopenta, cyclohexyl, Suberyl, cyclooctyl, cyclononyl or cyclodecyl.

C6-C14 aryl is, for example: the unsubstituted aromatic monocyclic alkyl of C6-C14, the unsubstituted aromatic condensation of C6-C14 are double Cyclic hydrocarbon radical or the unsubstituted aromatic condensation tricyclic hydrocarbyl of C6-C14.C6-C14 aryl is for example: phenyl, naphthalene, anthryl or phenanthryl.

C7-C20 aralkyl is unsubstituted.C7-C20 aralkyl is combined with the C1-C6 alkyl of C6-C14 aryl.

C1-C6 alkoxy is straight-chain or branched, and is unsubstituted.C1-C6 Alkoxy is such as: methoxyl group, Ethyoxyl, positive propoxy, isopropoxy, n-butoxy, sec-butoxy, tert-butoxy, amoxy, isoamoxy, neopentyl oxygen Or hexyloxy.

<1. photoreceptor>

Present embodiment is related to Electrophtography photosensor (hereinafter, sometimes referred to as photoreceptor).Sense involved in present embodiment Body of light has conductive base and photosensitive layer.

Hereinafter, A~Fig. 1 C referring to Fig.1, is illustrated the structure of photoreceptor 1.Figure 1A~Fig. 1 C is present embodiment institute The cross-sectional view for an example photoreceptor 1 being related to.

As shown in Figure 1A, photoreceptor 1 for example has conductive base 2 and photosensitive layer 3.It is photosensitive that photoreceptor 1 has single-layer type Layer 3c is as photosensitive layer 3.Photoreceptor 1 is so-called single-layer type photoreceptor.

As shown in Figure 1B, photoreceptor 1 can have: the 4 (primary coat of conductive base 2, single-layer type photosensitive layer 3c and middle layer Layer).Middle layer 4 is set between conductive base 2 and single-layer type photosensitive layer 3c.As shown in Figure 1A, photosensitive layer 3 can directly be set It is placed on conductive base 2, as shown in Figure 1B, photosensitive layer 3 can be set on conductive base 2 indirectly across middle layer 4.

Figure is as shown in 1C, and photoreceptor 1 can have: conductive base 2, single-layer type photosensitive layer 3c and protective layer 5.Protective layer 5 are set on single-layer type photosensitive layer 3c.

As long as single-layer type photosensitive layer 3c gives full play to the function as single-layer type photosensitive layer, thickness is not particularly limited. The thickness of single-layer type photosensitive layer 3c is preferably 5 μm or more 100 μm hereinafter, more preferably 10 μm or more 50 μm or less.

Single-layer type photosensitive layer 3c as photosensitive layer 3 contains charge producing agent and the compound (1) as electron transporting agent. Single-layer type photosensitive layer 3c can also contain one or more of cavity conveying agent and binding resin.Single-layer type photosensitive layer 3c is according to need It wants, additive can be contained.Charge producing agent, electron transporting agent and be added as needed ingredient (for example, cavity conveying agent, Binding resin or additive) included in one layer of photosensitive layer 3 (hereinafter, sometimes referred to as single-layer type photosensitive layer 3c).

In order to inhibit to be formed the generation of white point in image, it is preferred that the single-layer type photosensitive layer 3c containing compound (1) matches It is set to the most surface layer of photoreceptor 1.

The structure of photoreceptor 1 is illustrated above by reference to Figure 1A~Fig. 1 C.Next, the element to photoreceptor is illustrated.

<1-1. photosensitive layer>

Photosensitive layer contains compound (1) as electron transporting agent.The carried charge of calcium carbonate after photosensitive layer and calcium carbonate friction (hereinafter, carried charge of sometimes referred to as calcium carbonate) is+7.0 μ C/g or more.Thus, it is possible to speculate the photoreceptor of present embodiment Tool has the advantage that.

In order to make it easy to understand, illustrating to be formed a reason for generating white point in image.Image forms middle recording medium (example Such as, paper) with photoreceptor contact when, the minor constituent (for example, paper powder) of recording medium is attached to the surface of photoreceptor sometimes. When minor constituent is attached on the surface of photoreceptor, the light for exposing photoreceptor in the exposure process that image is formed is micro- sometimes Small component blocks.On photoreceptor, the light being exposed is difficult to decrease by the surface potential for the part that minor constituent blocks.Due to adjusting Toner is difficult to be attached to the insufficient part of reduction of surface potential, and results in and generate white point on image.

Wherein, when image forms middle recording medium (for example, paper) and photoreceptor contacts, the minor constituent of recording medium (for example, paper powder) is rubbed by photoreceptor, to charge into negative polarity or the positive polarity lower than desired value sometimes.In this regard, The photosensitive layer of the photoreceptor of present embodiment contains compound (1).Compound (1) is because containing halogen atom, so electronegativity is big. Minor constituent is contacted with the photoreceptor of present embodiment, and is rubbed by the photoreceptor containing the big compound of electronegativity (1) When, minor constituent often charges into the positive polarity of desired value or more.The surface electrification of photoreceptor in the electrification process that image is formed In the case where positive polarity, electrification at positive polarity photoreceptor surface and electrification be desired value more than positive polarity it is small at Divide and forms electricity repulsion.The carried charge of minor constituent is bigger positive value, and the electricity between the surface of photoreceptor, which repels, just to be become to get over Greatly.Minor constituent is not easy to be attached to the surface of photoreceptor as a result,.So as to inhibit to be formed the generation of white point in image.

Also, compared with the case where adding the surfactant containing halogen atom, comprising compound (1) as electronics Uniform photosensitive layer is more readily formed in agent delivery.The reason for this is that surfactant, which has to be readily orientable, is arranged in photosensitive layer surface Property.It is believed that by forming the evenly dispersed photosensitive layer of compound (1), even if easily causing photosensitive layer abrasion During long-time image is formed, it is also able to suppress the generation to form white point in image.

As described above, the carried charge of calcium carbonate is+7.0 μ C/g or more.Calcium carbonate is the one of the minor constituent of recording medium Example, that is, the main component of paper powder.When the carried charge of calcium carbonate is less than+7.0 μ C/g, the minor constituent of photoreceptor and recording medium After friction, minor constituent it is positively charged insufficient, formed image on be easy to produce white point.The carried charge of calcium carbonate preferably+ + 15.0 μ C/g of 7.0 μ C/g or more is hereinafter, be more preferably+10.0 μ C/g of+8.0 μ C/g or more hereinafter, especially preferably+8.5 μ C/g + 10.0 μ C/g or less above.

Hereinafter, being said referring to Fig. 2 to photosensitive layer 3 and the measurement method of the carried charge of the calcium carbonate after calcium carbonate friction It is bright.The carried charge of calcium carbonate is measured by carrying out first step, second step, third step and four steps.First step In, prepare 2 photosensitive layers 3, a photosensitive layer 3 is the first photosensitive layer 30, another photosensitive layer 3 is the second photosensitive layer 32.First Photosensitive layer 30 and the second photosensitive layer 32 are the circles of diameter 3cm.In second step, the calcium carbonate of 0.007g is placed on the first sense On photosphere 30.The calcium carbonate layer 24 being made of calcium carbonate is formed as a result,.Then, the second photosensitive layer is placed in calcium carbonate layer 24 32.In third step, in the environment of 23 DEG C of temperature and relative humidity 50%RH, in the state for keeping the second photosensitive layer 32 fixed Under, the first photosensitive layer 30 is rotated 60 seconds with revolving speed 60rpm.As a result, between the first photosensitive layer 30 and the second photosensitive layer 32, rub The calcium carbonate contained in calcium carbonate layer 24 is wiped, and charges calcium carbonate.In four steps, is aspirated and charged with electric quantity measuring device Calcium carbonate afterwards.The total electricity Q and mass M of aspirated calcium carbonate are measured with electric quantity measuring device, and are counted according to formula Q/M Calculate the carried charge of calcium carbonate.Also, the carried charge of calcium carbonate is measured especially by method described in embodiment.Above-mentioned ginseng According to Fig. 2, the measurement method of the carried charge of the calcium carbonate after illustrating photosensitive layer 3 and calcium carbonate friction.

Photosensitive layer contains compound (1) as electron transporting agent, can not only inhibit to form the generation of white point in image, And it can be improved the electrical characteristic (hereinafter, being recorded as sensitivity characteristic) of photoreceptor.Compound (1) because have ehter bond, so It is dissolved in the dissolubility height for being used to form the solvent of photosensitive layer, and often forms uniform photosensitive layer.

(electron transporting agent)

Electron transporting agent includes compound (1).Electron transporting agent for example conveys electronics in single-layer type photosensitive layer, and makes single-layer type Photosensitive layer has the characteristic of bipolarity (bipolar).Single-layer type photosensitive layer is by containing compound (1) as electron transport Agent, when paper is contacted with photoreceptor, the minor constituent (for example, paper powder) of recording medium is by the compound big containing electronegativity (1) photoreceptor rubs, so as to make minor constituent electrification be desired positive value.

Compound (1) is indicated by the following general formula (1).Compound (1) is naphthoquinone derivatives.

[changing 2]

In general formula (1), R₁And R₂It is respectively independent, it indicates: halogen atom；C1-C8 alkyl with 1 or more halogen atom； C3-C10 naphthenic base with 1 or more halogen atom；C6-C14 aryl with 1 or more halogen atom has 1 or more Halogen atom and the C6-C14 aryl with C1-C6 alkyl；Or the C7-C20 aralkyl with 1 or more halogen atom.

The R of general formula (1)₁And R₂Represented halogen atom is preferably chloro or fluorine-based.R₁And R₂Each independently represent halogen In the case where plain atom, R₁Represented halogen atom and R₂Represented halogen atom can be the same or different.For example, It can be R₁With R₂All indicate chloro.For example, it can be R₁Indicate chloro, R₂Indicate fluorine-based.

The R of general formula (1)₁And R₂Represented C1-C8 alkyl, C3-C10 naphthenic base, C6-C14 aryl and C7-C20 aralkyl All replaced by 1 or more halogen atom.Such halogen atom is preferably chloro or fluorine-based.C1-C8 alkyl, C3-C10 Naphthenic base, C6-C14 aryl and C7-C20 aralkyl respectively possessed by the quantity of halogen atom be preferably 1 or more 5 hereinafter, more Preferably 1 or more 3 or less.In addition, the R of general formula (1)₁And R₂Represented C6-C14 aryl can have C1-C6 alkyl.

In general formula (1), R₁And R₂The position of substitution (binding site) be not particularly limited.R₁And R₂Can respectively in connection in Any position at the ortho position of phenoxy group, meta position and contraposition.

In order to preferably inhibit to be formed the generation of white point in image, preferably R₁And R₂Each independently represent halogen atom.

In general formula (1), p and q are respectively independent, indicate 1 or more 5 integer below.When p indicates 2 or more 5 integer below, Several R₁It can be the same or different.When q indicates 2 or more 5 integer below, several R₂It can be the same or different. In order to especially inhibit to be formed the generation of white point in image, preferably p and q each independently represent 3 or more 5 integers below.Knot The quantity of halogen atom possessed by 2 phenoxy groups together in benzene-naphthalene diimide is more, the minor constituent of recording medium (for example, Paper powder) when being rubbed by photoreceptor, the carried charge of minor constituent often can more show biggish positive value.

In general formula (1), base represented by the following general formula (4) is preferably same with base phase represented by the following general formula (5).It is managed By being, compound (1) can be efficiently manufactured by reducing raw material or reaction process, which is able to suppress to form figure The generation of white point as in.

[changing 3]

In general formula (4), R₁And R in p and general formula (1)₁And the meaning of p is identical.R in general formula (4)₁And the preference of p and logical R in formula (1)₁And the preference of p is identical.Y₁Indicate the binding site relative to naphthalene nucleus.

[changing 4]

In general formula (5), R₂And the R in q and general formula (1)₂And the meaning of q is identical.R in general formula (5)₂And the preference of q with R in general formula (1)₂And the preference of q is identical.Y₂Indicate the binding site relative to naphthalene nucleus.

The Y of base represented by general formula (4)₁With the Y of base represented by the following general formula (6)₁In conjunction with.Then, in general formula (4) Y₁In conjunction with oxygen atom and general formula (6) in Y₁In conjunction with carbon atom between form singly-bound.Base represented by general formula (5) Y₂With the Y of base represented by general formula (6)₂In conjunction with.Then, the Y in general formula (5)₂In conjunction with oxygen atom and general formula (6) in Y₂ In conjunction with carbon atom between form singly-bound.In general formula (6), Y₁And Y₂All indicate binding site.

[changing 5]

Base phase represented by base represented by general formula (4) and general formula (5) is in the case where, the R in general formula (1)₁、R₂, p and q With following relationships.In general formula (1), R₁And R₂Indicate identical base.P is mutually the same with q, and indicates 1 or more 5 integer below. When p and q indicates 2 or more 5 same integer below, several R₁It can be the same or different, several R₂Can it is identical can also With difference.In this case, being incorporated into the R of a binding site of a phenoxy group₁Be incorporated on other phenoxy groups and the R₁It is right The R of the position of substitution answered₂It is identical.In order to make it easy to understand, being illustrated as an example.For example, being incorporated into the contraposition of a phenoxy group R₁With the R for being incorporated into ortho position₁It can be the same or different.In this case, being incorporated into the R of the contraposition of other phenoxy groups₂With knot Together in the R at ortho position₂It can be the same or different.In this case, being incorporated into the R of the contraposition of a phenoxy group₁Be incorporated into other The R of the contraposition of phenoxy group₂It is identical.It is incorporated into the R at the ortho position of a phenoxy group₁With the R at the ortho position for being incorporated into other phenoxy groups₂Phase Together.

Base phase represented by base represented by general formula (4) and general formula (5) is in the case where, and general formula (1) is for example by following logical Formula (1 ') indicates.R in general formula (1 ')₁And p respectively with the R in general formula (1)₁And the meaning of p is identical.

[changing 6]

Specific such as compound (1-1)~(1-5) of compound (1).Compound (1-1)~(1-5) is respectively by followingization Formula (1-1)~(1-5) is indicated.

[changing 7]

[manufacturing method of compound (1)]

Compound (1) is for example manufactured according to following reactions (R-1) or method similar therewith.Other than these reactions, according to It needs that process appropriate can also be contained.React the R in reaction equation represented by (R-1)₁、R₂, in p and q and general formula (1) R₁、R₂, the meaning of p and q it is identical.X indicates halogen atom.

[changing 8]

It reacts in (R-1), makes the compound (A) of 1 molar equivalent, the compound (B) of 1 molar equivalent and 1 molar equivalent Compound (C) reaction, obtains the compound (1) of 1 molar equivalent.Reaction (R-1) reaction temperature be preferably 0 DEG C or more 50 DEG C with Under, more preferably 20 DEG C or more 30 DEG C or less.The reaction time for reacting (R-1) is preferably 5 hours 0.5 hour or more hereinafter, more Preferably 2 hours 1 hour or more or less.

Reaction (R-1) can carry out in the presence of base.Alkali is for example: potassium carbonate, sodium hydroxide or sodium hydride.These alkali can One kind is used alone, two or more use can also be combined.The additive amount of alkali is relative to 1 mole of compound (A), preferably It is 2 moles or more 5 moles or less.

Reaction (R-1) can also carry out in a solvent.Solvent is for example: n,N-Dimethylformamide (DMF) or tetrahydrofuran (THF)。

As needed, it is purified by the way that reaction product obtained in (R-1) will be reacted, can will be used as target compound Compound (1) isolate.Well-known method may be appropriately used in method of purification.Such as crystallization method or silica gel can be passed through Column chromatography is purified.Purify solvent used for example: the mixing of chloroform, hexane and chloroform and hexane is molten Agent.

In addition, when manufacture compound (1), base represented by base represented by compound (1) formula of (4) and general formula (5) In identical situation, compound (B) and compound (C) are identical compound.In this case, in reaction (R-1), as long as making 1 The compound (A) of molar equivalent is reacted with the compound (B) of 2 molar equivalents, obtains the compound (1) of 1 molar equivalent.By This, it is convenient to omit the process of manufacture compound (C) does not use compound (C).

Single-layer type photosensitive layer can also contain only compound (1) as electron transporting agent.In addition, single-layer type photosensitive layer removes It, can also be containing the electron transporting agent other than compound (1) (hereinafter, sometimes referred to as other electronics are defeated other than compound (1) Send agent).Other electron transporting agents are for example: quinones, diimide compounds, hydrazone compounds, thiapyran class compound, Trinitro- thioxanthene ketone class compound, 3,4,5,7- tetranitros -9-Fluorenone class compound, Binitroanthracene compound, dinitro a word used for translation Pyridine class compound, tetracyanoethylene, 2,4,8- trinitro- thioxanthones, dinitrobenzene, dinitro acridine, succinic anhydride, maleic anhydride Or dibromomaleic acid acid anhydride.Quinones is for example: biphenyl quinones, azo quinones, anthraquinone analog compound, naphthoquinones Class compound, nitroanthracene quinones or dinitroanthraquinone class compound.Electron transporting agent can be used alone, Two or more use can be combined.Relative to the gross mass of electron transporting agent, the content of compound (1) is preferably 80 mass % More than, more preferably 90 mass % or more, especially preferably 100 mass %.

Content relative to the binding resin of 100 mass parts, the compound (1) as electron transporting agent is preferably 20 mass Part or more 40 below the mass.The content of compound (1) relative to 100 mass parts binding resin be 20 mass parts more than when, It is easy to improve the sensitivity characteristic of photoreceptor.The content of compound (1) is 40 mass parts relative to the binding resin of 100 mass parts When following, compound (1) is easily soluble in the solvent for being used to form photosensitive layer, and uniform photosensitive layer easy to form.

(charge producing agent)

Single-layer type photosensitive layer as photosensitive layer contains charge producing agent.As long as the charge of charge producing agent photoreceptor generates Agent is not particularly limited.Charge producing agent is for example: phthalocyanine pigment, class pigment, disazo pigment, trisazo pigment, two sulphur Ketone pyrrolopyrrole (dithioketo-pyrrolopyrrole) pigment, without metal naphthalene phthalocyanine pigment, metal naphthalene phthalocyanine pigment, Square acid color, indigo pigments, azulene pigment, cyanine pigment, inorganic light-guide material (for example, selenium, selenium-tellurium, selenium-arsenic, cadmium sulfide or Amorphous silicon) powder, pyrylium pigments, anthanthrene quinones pigment, triphenylmethane pigment, intellectual circle's class pigment, toluene amines pigment, Pyrazolines pigment or quinacridone-type pigments.Charge producing agent can be used alone, and can also combine two or more next It uses.

Phthalocyanine pigment is for example: metal-free phthalocyanine or metal phthalocyanine represented by chemical formula (CGM-1).Metal phthalocyanine example As: titanyl phthalocyanine, hydroxy gallium phthalocyanine or gallium chlorine phthalocyaninate represented by chemical formula (CGM-2).Phthalocyanine pigment can be crystallization, It can be noncrystalline.The crystal shape (for example, α type, β type, Y type, V-type or II type) of phthalocyanine pigment is not particularly limited, The phthalocyanine pigment of various crystal shapes can be used.

[changing 9]

[changing 10]

The crystal of metal-free phthalocyanine for instance that the X-type crystal of metal-free phthalocyanine (hereinafter, sometimes referred to as X-type is without metal phthalein Cyanines).The crystallization of titanyl phthalocyanine is for example: the α type of titanyl phthalocyanine, β type or Y type crystal (hereinafter, sometimes referred to as " α type, β type or Person's Y-shaped oxygen titanium phthalocyanines ").The V-type crystal of the crystallization such as hydroxy gallium phthalocyanine of hydroxy gallium phthalocyanine.The crystallization of gallium chlorine phthalocyaninate such as chlorine The II type crystal of gallium phthalocyanine.

For example, in digit optical formula image forming apparatus (for example, using the laser printing of semiconductor laser etc light source Machine or facsimile machine) in, it is preferable to use 700nm above wavelength region have sensitivity photoreceptor.From 700nm's or more From the aspect of wavelength region has high quantum production rate, charge producing agent is preferably phthalocyanine pigment, more preferably metal-free phthalocyanine Or titanyl phthalocyanine, further preferably X-type metal-free phthalocyanine or Y-shaped oxygen titanium phthalocyanines.In photosensitive layer containing compound (1) as In the case where cavity conveying agent, especially for sensitivity characteristic is improved particularly, charge producing agent is more preferably Y-shaped oxygen titanium phthalein Cyanines.

For example, Y-shaped oxygen titanium phthalocyanines are in CuK α characteristic X-ray difraction spectrum, at 27.2 ° of Bragg angle (2 θ ± 0.2 °) With main peak.Main peak in CuK α characteristic X-ray difraction spectrum refers to that in Bragg angle (2 θ ± 0.2 °) be 3 ° or more 40 ° or less Range in the first big or second largest intensity peak.

Illustrate the measurement method of CuK α characteristic X-ray difraction spectrum.Sample (titanyl phthalocyanine) is filled into X-ray to spread out On the sample holder of injection device (for example, Rigaku Corporation manufacture " RINT (Japan registration trade mark) 1100 "), penetrated in X Spool Cu, tube voltage 40kV, tube current 30mA and CuK α characteristic x-ray wavelengthUnder conditions of, measure X-ray diffraction Spectrum.For example, measurement range (2 θ) is 3 ° or more 40 ° or less (initial angles: 3 °；Angular stop: 40 °), scanning speed is 10 °/point.

In the image shape using short wavelength laser light source (for example, laser source with 350nm or more 550nm or less wavelength) At in photoreceptor used on device, it is preferable to use anthanthrene quinones pigment is as charge producing agent.

Relative to 100 mass parts of binding resin contained in single-layer type photosensitive layer, the content of charge producing agent is preferably 0.1 More than mass parts 50 below the mass, and more than more preferably 0.5 mass parts 30 below the mass, especially preferably 0.5 mass parts Above 4.5 below the mass.

(cavity conveying agent)

Single-layer type photosensitive layer is for example containing cavity conveying agent.Cavity conveying agent is for example: triphenylamine derivative, diamine derivative (example Such as, N, N, N ', N '-tetraphenyl benzidine derivative derivative, N, N, N ', N '-tetraphenyl phenylenediamine derivative, N, N, N ' and, N '- Tetraphenyl naphthylenediamine derivative, N, N, N ', N '-tetraphenyl phenanthrylene diamines (N, N, N ', N '-tetraphenyl Phenanthrylene diamine) derivative or two (aminophenyl vinyl) benzene derivatives), furodiazole compound (example Such as, 2,5- bis- (4- methylamino phenyl) -1,3,4- oxadiazoles), styrene compound is (for example, 9- (4- diethylaniline second Alkenyl) anthracene), carbazole compound (for example, polyvinyl carbazole), organopolysilane compound, pyrazoline compounds (example Such as, 1- phenyl -3- (to dimethylaminophenyl) pyrazoline), hydrazone compounds, Benzazole compounds, dislike azole compounds, different Dislike azole compounds, thiazole compound, thiadiazole compound, glyoxaline compound, pyrazole compound or triazole type Close object.Cavity conveying agent can be used alone, and can also combine two or more use.

Such as compound of the one of cavity conveying agent (2).Compound (2) is indicated by general formula (2).

[changing 11]

In general formula (2), R₂₁~R₂₆It is respectively independent, indicate C1-C6 alkyl or C1-C6 alkoxy.R, s, v and w are respectively only It is vertical, indicate 0 or more 5 integer below.T and u is respectively independent, indicates 0 or more 4 integer below.

In general formula (2), R₂₁~R₂₆It is respectively independent, preferably indicate C1-C6 alkyl, more preferably expression methyl.r,s,v And w is respectively independent, preferably indicates 0 or 1.T and u is respectively independent, preferably indicates 0 or 1.

The specific such as compound (2-1), (2-2) or (2-3) of compound represented by general formula (2).Compound (2-1), (2-2) and (2-3) is indicated by following chemical formula (2-1), (2-2) and (2-3) respectively.

[changing 12]

[changing 13]

[changing 14]

The ionization potential of cavity conveying agent is preferably 5.35eV or more 5.55eV or less.The ionization potential of cavity conveying agent is When 5.35eV or more, cavity conveying agent is difficult to discharge electronics.If containing the cavity conveying agent for being difficult to discharge electronics in photosensitive layer, When photoreceptor and recording medium (for example, paper) contact, relative to the paper powder from paper, cavity conveying agent is difficult to discharge electricity Son, paper powder easily band positive polarity.By containing the compound (1) as electron transporting agent in photosensitive layer and there is defined ionization The cavity conveying agent of gesture, paper powder is easier band positive polarity, so as to especially paper powder be inhibited to be attached to photoreceptor.On the other hand, When the ionization potential of cavity conveying agent is 5.55eV or less, it can be improved hole and imitated from charge producing agent to the transmitting of cavity conveying agent Rate.

Air atmosphere type Ultraviolet Photoelectron analytical equipment can be used for example in the ionization potential of cavity conveying agent, and (reason grinds gauge Co., Ltd.'s manufacture " AC-1 ") it measures.The measurement method of the ionization potential of cavity conveying agent is method described in embodiment Or it replaces method.

From the aspect of with defined ionization potential and especially paper powder being inhibited to be attached to photoreceptor, cavity conveying agent is preferably Compound (2-1).

Relative to 100 mass parts of binding resin, the content of the cavity conveying agent contained in single-layer type photosensitive layer is preferably 10 More than mass parts 200 below the mass, and more than more preferably 10 mass parts 100 below the mass.

(binding resin)

Single-layer type photosensitive layer contains binding resin.Binding resin is, for example: thermoplastic resin, thermosetting resin or photocuring tree Rouge.Thermoplastic resin is for example: polycarbonate resin, polyarylate resin, styrene-butadiene copolymer, styrene-acrylonitrile are total Polymers, Styrene maleic acid copolymer, acrylate copolymer, Styrene-acrylic copolymer, polyvinyl resin, second Alkene-vinyl acetate co-polymer, chlorinated polyethylene resin, Corvic, acrylic resin, ionomer resin, vinyl chloride- Vinyl acetate co-polymer, alkyd resin, polyamide, polyurethane resin, polysulfone resin, diallyl phthalate Propyl ester resin, ketone resin, polyvinyl butyral resin, polyester resin or polyether resin.Thermosetting resin is for example: silicone tree Rouge, epoxy resin, phenolic resin, Lauxite or melamine resin.Light-cured resin is for example: epoxy acrylate (epoxy The acrylic acid adduct of compound) or polyurethane-acrylate (acrylic acid adducts of urethanes).These bonding trees Rouge can be used alone, and can also combine two or more use.

The single-layer type more excellent from the harmony for obtaining processability, mechanical performance, optical property and wear resistance is photosensitive It is preferably polycarbonate resin in these resins from the aspect of layer.Polycarbonate resin is for example: bisphenol Z c-type polycarbonate resin Rouge, bisphenol-c type polycarbonate resin or bisphenol A polycarbonate resin.Other examples such as the following general formula of polycarbonate resin (3) resin represented by (hereinafter, sometimes referred to as resin (3)).

[changing 15]

In general formula (3), R₃₁~R₃₆It is respectively independent, indicate hydrogen atom, C1-C6 alkyl or C6-C14 aryl.Wherein, R₃₅And R₃₆Can be bonded to each other indicates C5-C7 cycloalkylidene.M indicates 0.00 or more 0.90 number below.N indicate 0.10 or more 1.00 with Under number.M+n=1.00.

R in general formula (3)₃₁~R₃₆Represented C1-C6 alkyl is preferably C1-C4 alkyl, more preferably methyl.

R in general formula (3)₃₁~R₃₆Represented C6-C14 aryl is preferably phenyl.

In general formula (3), preferably R₃₁、R₃₂、R₃₃And R₃₄All indicate hydrogen atom.R₃₅And R₃₆Preferably be bonded to each other expression C5-C7 cycloalkylidene, being more preferably bonded to each other indicates cyclohexylidene (cyclohexylidene).

In general formula (3), it is preferred that R₃₁、R₃₂、R₃₃And R₃₄All indicate hydrogen atom, R₃₅And R₃₆Being bonded to each other indicates sub- ring Hexyl (cyclohexylidene).In general formula (3), it is further preferred that R₃₁、R₃₂、R₃₃And R₃₄All indicate hydrogen atom, R₃₅And R₃₆ Being bonded to each other indicates cyclohexylidene (cyclohexylidene), and m indicates that 0.30 or more 0.70 number below, n indicate 0.30 or more 0.70 number below, m+n=1.00.

In general formula (3), it is preferred that m 0.00, n 1.00, R₃₃And R₃₄All indicate hydrogen atom, R₃₅And R₃₆It is bonded to each other It indicates cyclohexylidene (cyclohexylidene).

Resin (3) includes constitutional repeating unit represented by general formula (3a) (hereinafter, sometimes referred to as repetitive unit (3a)) With constitutional repeating unit represented by general formula (3b) (hereinafter, sometimes referred to as repetitive unit (3b)).Also, in general formula (3a) R₃₁And R₃₂Respectively with the R in general formula (3)₃₁And R₃₂Meaning it is identical.R in general formula (3b)₃₃、R₃₄、R₃₅And R₃₆Respectively with general formula (3) R in₃₃、R₃₄、R₃₅And R₃₆Meaning it is identical.

[changing 16]

[changing 17]

In general formula (3), m is indicated: in resin (3), the amount (molal quantity) of the substance of repetitive unit (3a) is single relative to repeating The ratio (molar fraction) of the amount (molal quantity) of the total substance of first (3a) and repetitive unit (3b).N is indicated: in resin (3), weight The amount (molal quantity) of the substance of multiple unit (3b) (is rubbed relative to repetitive unit (3a) and the amount of the total substance of repetitive unit (3b) Your number) ratio (molar fraction).Preferably 0.00≤m≤0.70, more preferably 0.00≤m≤0.40.Preferably also m is 0.00 or 0.30≤m≤0.70.

Resin (3) can be the random copolymer that repetitive unit (3a) and repetitive unit (3b) is carried out to random copolymerization.Or Person, resin (3) can be the alternate copolymer that repetitive unit (3a) and repetitive unit (3b) carries out alternating copolymerization.Alternatively, resin (3) it can be the periodicity for being periodically copolymerized the repetitive unit (3b) of a kind or more of repetitive unit (3a) and a kind or more Copolymer.Alternatively, resin (3) is also possible to the block being made of several repetitive units (3a) and by several repetitive unit The block copolymer that the block that (3b) is constituted is copolymerized.

The concrete example of resin (3) polycarbonate resin as represented by following chemical formula (3-1) or (3-2).Chemical formula (3- 1) polycarbonate resin represented by is the resin that the m in general formula (3) is 0.00 and n is 1.00.Represented by chemical formula (3-1) Polycarbonate resin is only made of repetitive unit (3b).Polycarbonate resin represented by chemical formula (3-2) is in general formula (3) The resin that m is 0.40 and n is 0.60.

[changing 18]

[changing 19]

The viscosity average molecular weigh of binding resin is preferably 20,000 or more, more preferably 20,000 or more 52,500 or less.It is viscous When the viscosity average molecular weigh for tying resin is 20,000 or more, it is easy to improve the wear resistance of photoreceptor.The viscous equal molecule of binding resin When amount is 52,500 or less, binding resin is easily soluble in solvent, the viscosity of single-layer type photosensitive layer coating fluid when forming photosensitive layer It will not become excessively high.To single-layer type photosensitive layer easy to form.

As long as the manufacturing method of binding resin can manufacture resin (3), it is not particularly limited.An example of resin (3) Manufacturing method is will to be used to constitute diol compound and the method (institute of phosgene progress polycondensation of the repetitive unit of polycarbonate resin The phosgenation of meaning).More specifically, for example, by diolation represented by diol compound represented by general formula (3c), general formula (3d) Close the method that object and phosgene carry out polycondensation.In addition, the R in general formula (3c)₃₁And R₃₂Respectively with the R in general formula (3)₃₁And R₃₂Contain Justice is identical.R in general formula (3d)₃₃、R₃₄、R₃₅And R₃₆Respectively with the R in general formula (3)₃₃、R₃₄、R₃₅And R₃₆Meaning it is identical.Tree There are also the methods that diol compound and diphenyl carbonate are carried out ester exchange reaction for other examples of the manufacturing method of rouge (3).

[changing 20]

[changing 21]

(additive)

Single-layer type photosensitive layer is as needed, can contain additive.Additive is for example: degradation inhibitor (for example, antioxidant, Radical scavenger, singlet state quencher or ultraviolet absorbing agent), softening agent, surface modifier, incremental agent, thickener, dispersion Stabilizer, wax, receptor, donor, surfactant, plasticizer, sensitizer or levelling agent.Antioxidant is for example: hindered phenol (example Such as, di-tert-butyl p-cresol), hindered amine, p-phenylenediamine, aromatic yl paraffin, hydroquinone, spiral shell benzodihydropyran (spirochroman), spiral shell indone (spiroindanone) or their derivative；Organosulfur compound or organic phosphorus chemical combination Object.

<1-2. conductive base>

As long as conductive base can be used as the conductive base of photoreceptor, it is not particularly limited.As long as conductive base is at least Surface element is formed by conductive material.Conductive base for example can be the conductive base formed by conductive material. Conductive base is for example also possible to the conductive base coated by conductive material.Conductive material is for example: aluminium, iron, copper, Tin, platinum, silver, vanadium, molybdenum, chromium, cadmium, titanium, nickel, palladium, indium, stainless steel or brass.For these conductive materials, can individually make With two or more (for example, as alloys) can also be combined to use.From mobility of the charge from photosensitive layer to conductive base It is preferably aluminium or aluminium alloy in these conductive materials from the aspect of good.

The shape of conductive base is suitably selected according to the structure of image forming apparatus.The shape of conductive base is for example It can be sheet or drum type.In addition, the thickness of conductive base is suitably selected according to the shape of conductive base.

<1-3. middle layer>

Middle layer (priming coat) is for example containing inorganic particle and for the resin (middle layer resin) of middle layer.It is considered that: Since there are middle layers, so making exposed photosensitive while maintaining can inhibit the state of insulation of this degree of generation of electric leakage The electric current flowing generated when body is smooth, to inhibit the increase of resistance.

Inorganic particle is for example: metal (for example, aluminium, iron or copper), metal oxide are (for example, titanium dioxide, aluminium oxide, oxygen Change zirconium, tin oxide or zinc oxide) particle；Or the particle of nonmetal oxide (for example, silica).These inorganic particles Both it can be used alone, two or more can also be used in combination.

As long as middle layer resin can be used as being formed the resin of middle layer, it is not particularly limited.Middle layer can also be with Contain additive.The example of additive of example and photosensitive layer of the additive of middle layer is identical.

Photoreceptor is for example manufactured as following.Photoreceptor by conductive base be coated with single-layer type photosensitive layer coating fluid, And it is allowed to dry to manufacture.Single-layer type photosensitive layer coating fluid is by adding charge producing agent, electron transporting agent and as needed The ingredient (for example, cavity conveying agent, binding resin and additive) added is dissolved or dispersed in solvent to manufacture.

As long as the solvent contained in single-layer type photosensitive layer coating fluid can by each ingredient contained by coating fluid dissolve or Dispersion is not particularly limited.Solvent is for example: alcohols (for example, methanol, ethyl alcohol, isopropanol or butanol), aliphatic hydrocarbon (for example, N-hexane, octane or hexamethylene), aromatic hydrocarbon (for example, benzene, toluene or dimethylbenzene), halogenated hydrocarbon is (for example, methylene chloride, dichloro Ethane, carbon tetrachloride or chlorobenzene), ethers is (for example, dimethyl ether, diethyl ether, tetrahydrofuran, glycol dimethyl ether, diethylene glycol dimethyl Ether or propylene glycol monoethyl ether), ketone (for example, acetone, methyl ethyl ketone or cyclohexanone), esters are (for example, ethyl acetate or acetic acid Methyl esters), dimethylformaldehyde, dimethylformamide or dimethyl sulfoxide.These solvents can be used alone, and can also combine It is two or more to use.In order to improve manufacture photoreceptor when operability, as solvent, it is preferable to use be non-halogenated solvent (solvent other than halogenated hydrocarbon).

Each ingredient is mixed and is distributed in solvent, to prepare coating fluid.For mixing or disperse, such as can make With ball mill, roller mill, ball mill, grater, paint shaker or ultrasonic dispersing machine.

In order to improve the dispersibility of each ingredient, single-layer type photosensitive layer coating fluid can also for example contain surfactant.

Method for using single-layer type photosensitive layer to be coated with coating fluid, as long as can be by coating fluid even spread Method on conductive base, is not particularly limited.Coating method is for instance that dip coating, spray coating method, spin-coating method or stick apply Method.

Do not have for the method for dry single-layer type photosensitive layer coating fluid as long as the solvent in coating fluid can be made to evaporate Especially limitation.For example, there is a kind of method for being heat-treated (heated-air drying) using high-temperature drier or pressure Reduction Dryer.Heat It is 40 DEG C or more 150 DEG C or less and the time is 120 minutes 3 minutes or more or less that treatment conditions, which are, for example, temperature,.

In addition, the manufacturing method of photoreceptor also can according to need, the process and formation to form middle layer are further included One or two processes in the process of protective layer.Well-known method can be properly selected to form middle layer to realize Process and formed protective layer process.

<2. image forming apparatus>

Next, being illustrated referring to Fig. 3 to the image forming apparatus 100 for having photoreceptor 1 involved in present embodiment. An example structure of Fig. 3 expression image forming apparatus 100.

As long as the image forming apparatus of 100 electrofax mode of image forming apparatus, is not particularly limited.For example, figure It can be monochrome image formation device as forming device 100, be also possible to color image forming device.Image forming apparatus 100 In the case where being color image forming device, image forming apparatus 100 is for example, by using series system.Hereinafter, illustrating series connection The image forming apparatus 100 of mode.

Image forming apparatus 100 has: image forming unit 40a, 40b, 40c and 40d, transfer belt 50 and fixing section 52.Hereinafter, image forming unit 40a, 40b, 40c and 40d are recorded as image forming unit in the case where needing not distinguish between 40。

Image forming unit 40 has: photoreceptor 1, electro-mechanical part 42, exposure portion 44, development section 46 and transfer section 48.It is photosensitive Body 1 is set to the central location of image forming unit 40.Photoreceptor 1 is arranged to can rotation (counterclockwise) in the direction of the arrow.Feeling Around body of light 1, on the basis of electro-mechanical part 42, set gradually since the upstream side of the direction of rotation of photoreceptor 1 electro-mechanical part 42, Exposure portion 44, development section 46 and transfer section 48.Also, image forming unit 40 can also have cleaning part (not shown) or except electricity Portion (not shown), or both all has.

Electro-mechanical part 42 charges the surface of photoreceptor 1.Electro-mechanical part 42 is cordless or the way of contact.Cordless Electro-mechanical part 42 be, for example, corona tube charger or grid corona tube charger.The electro-mechanical part 42 of the way of contact is, for example, charged roller Or with brush.

Image forming apparatus 100 can have charged roller as electro-mechanical part 42.When charging the surface of photoreceptor 1, band Electric roller is contacted with photoreceptor 1.Photoreceptor 1 is attached in the minor constituent (for example, paper powder) of recording medium P (for example, paper) In the case where surface, minor constituent is pressed against the surface of photoreceptor 1 because contacting with charged roller.Minor constituent is easy as a result, It adheres on the surface of photoreceptor 1.However, image forming apparatus 100 has photoreceptor 1, the photoreceptor 1 be able to suppress it is small at The generation of white point caused by the attachment divided.Therefore, even if image forming apparatus 100 has charged roller as the feelings of electro-mechanical part 42 Under condition, minor constituent is also not easy to be attached to the surface of photoreceptor 1, generates white point so as to inhibit to be formed by image.

Electro-mechanical part 42 is preferably to charge the surface of photoreceptor 1 at positive polarity.The photoreceptor 1 and record of present embodiment are situated between When matter P contact is rubbed, recording medium P often charges into positive polarity.The surface of photoreceptor 1 is charged by electro-mechanical part 42 at just Polarity chron, the surface of photoreceptor 1 are repelled with the recording medium p-shaped for being charged by friction into positive polarity at electricity.As a result, recording medium P Minor constituent (for example, paper powder) be difficult to be attached to the surface of photoreceptor 1, so as to preferably inhibit to be formed white point in image Generation.

Exposure portion 44 makes the surface exposure of the photoreceptor 1 after electrification.Electrostatic latent image is formed on the surface of photoreceptor 1 as a result,. Electrostatic latent image is formed based on the image data for being input to image forming apparatus 100.

Toner is supplied to the electrostatic latent image for being formed in photoreceptor 1 by development section 46.Latent electrostatic image developing is toning as a result, Agent picture.Photoreceptor 1 is equivalent to the picture supporting body of carrying toner image.Toner may be used as monocomponent toner.Or it can also To mix toner with required carrier, toner is used in two-component developing agent.Toner is used as single component development In the case where agent, the toner as monocomponent toner is supplied to the electrostatic latent image for being formed in photoreceptor 1 by development section 46.It adjusts In the case that toner is used in two-component developing agent, development section 46 will be in the toner and carrier that contain in two-component developing agent Toner is supplied to the electrostatic latent image for being formed in photoreceptor 1.

Latent electrostatic image developing is toner image while contacting with photoreceptor 1 by development section 46.That is, image So-called contact visualization way can be used by forming device 100.Minor constituent (the example of the surface attachment recording medium P of photoreceptor 1 Such as, paper powder) in the case where, minor constituent is pressed against the surface of photoreceptor 1 and contacting with development section 46.It is small as a result, Ingredient is easy on the surface for adhering to photoreceptor 1.However, image forming apparatus 100 has photoreceptor 1, which can press down The generation of white point caused by the attachment of minor constituent processed.Therefore, even if image forming apparatus 100 is using contact development side Formula, minor constituent are also not easy to be attached to the surface of photoreceptor 1, generate white point so as to inhibit to be formed by image.

Development section 46 can clean the surface of photoreceptor 1.That is, image forming apparatus 100 can use So-called cleaner-less mode.Development section 46 can will remain on the ingredient on the surface of photoreceptor 1 (hereinafter, sometimes referred to as " residual Profit retention point ") removal.Such as toner components of the one of residual component, more specifically, being toner or free external additive. For example non-toner components of other examples of residual component, more specifically, being the minor constituent (for example, paper powder) of recording medium P.It adopts With in the image forming apparatus 100 of cleaner-less mode, the residual component on the surface of photoreceptor 1 can not be cleaned portion (for example, Cleaning scraper) it scrapes off.Therefore, using in the image forming apparatus 100 of cleaner-less mode, residual component is typically easy to remain on The surface of photoreceptor 1.However, the photoreceptor 1 of present embodiment is able to suppress the production of white point caused by the attachment of minor constituent It is raw.Therefore, even if having the image forming apparatus 100 of such photoreceptor 1 using cleaner-less mode, residual component is outstanding It is that the minor constituent (for example, paper powder) of recording medium P is also difficult to remain on the surface of photoreceptor 1.To image forming apparatus 100 are able to suppress to be formed by image and generate white point.

Development section 46 will efficiently clean the surface of photoreceptor 1, preferably satisfy condition (a) and condition (b) as shown below.

Condition (a): using contact visualization way, it is poor that revolving speed (rotation speed) is set between photoreceptor 1 and development section 46.

Condition (b): the surface potential of photoreceptor 1 and the current potential of developing bias meet formula below (b-1) and formula (b-2).

The surface potential (V) ... (b-1) of the unexposed area of current potential (V) the < photoreceptor 1 of 0 (V) < developing bias

Surface potential (V) > 0 (V) ... (b-2) of the exposure area of current potential (V) the > photoreceptor 1 of developing bias

As shown in condition (a), when rotational speed difference is set using contact visualization way and between photoreceptor 1 and development section 46, The surface of photoreceptor 1 is contacted with development section 46, and the attached component on the surface of photoreceptor 1 is gone by the friction with development section 46 It removes.The revolving speed of development section 46 is preferably faster than the revolving speed of photoreceptor 1.

In condition (b), it is assumed that the case where visualization way is discharged-area development mode.In order to improve as single-layer type photoreceptor The sensitivity characteristic of photoreceptor 1, it is preferred that the electrification polarity of toner, the unexposed area of photoreceptor 1 surface potential, The surface potential of the exposure area of photoreceptor 1 and the current potential of developing bias are all positive polarity.Also, in transfer section 48 by toner After being transferred to recording medium P from photoreceptor 1, and before electro-mechanical part 42 charges the surface of the photoreceptor 1 of next circle, measurement sense The surface potential of the unexposed area of body of light 1 and the surface potential of exposure area.

When meeting formula (b-1) of condition (b), the toner for remaining in photoreceptor 1 is acted on (hereinafter, sometimes referred to as Remaining toner) and the unexposed area of photoreceptor 1 between electrostatic repulsion be greater than act on remaining toner and development section 46 Between electrostatic repulsion.Therefore, the remaining toner of the unexposed area of photoreceptor 1 is moved to development from the surface of photoreceptor 1 Portion 46 and be recovered.

When meeting formula (b-2) of condition (b), act on quiet between remaining toner and the exposure area of photoreceptor 1 Electric repulsion is less than the electrostatic repulsion acted between remaining toner and development section 46.Therefore, the exposure area of photoreceptor 1 is residual Toner is stayed to be maintained at the surface of photoreceptor 1.The toner for being maintained at the exposure area of photoreceptor 1 is used directly to image shape At.

The conveying recording medium P between photoreceptor 1 and transfer section 48 of transfer belt 50.Transfer belt 50 is endless belt.Transfer belt 50 are set as (clockwise direction) rotating in the direction of the arrow.

The toner image to be developed by development section 46 is transferred to recording medium P from photoreceptor 1 by transfer section 48.Work as toner As when being transferred to recording medium P from photoreceptor 1, photoreceptor 1 is contacted with recording medium P.That is, image forming apparatus 100 use so-called direct transfer modes.Transfer section 48 is, for example, transfer roll.

The toner image of several color (for example, black, cyan, magenta and yellow these four colors) passes through figure respectively The recording medium P in transfer belt 50 is successively overlapped as forming unit 40a~40d.In addition, image forming apparatus 100 is single In the case where color image forming apparatus, image forming apparatus 100 has image forming unit 40a, forms list without having image First 40b~40d.

Fixing section 52 to by transfer section 48 be transferred to recording medium P unfixed toner image carry out heating and/ Or pressurization.Fixing section 52 is, for example, heating roller and/or pressure roller.By being heated and/or being pressurizeed to toner image, to adjust Toner picture is fixed in recording medium P.As a result, forming image on recording medium P.

<3. handle box>

Next, being illustrated with continued reference to Fig. 3 to the handle box for the photoreceptor 1 for having present embodiment.Handle box is equivalent to Each image forming unit 40a~40d.Handle box has photoreceptor 1.Handle box can also have on the basis of photoreceptor 1 At least one in electro-mechanical part 42, exposure portion 44, development section 46 and transfer section 48.Handle box, which can also have cleaning device, (does not scheme Show) or except electric appliance (not shown), or both all has.Handle box is designed to dismount certainly relative to image forming apparatus 100 Such as.Therefore, handle box is easily processed, can be simply and rapidly right in the case where the deterioration such as sensitivity characteristic of photoreceptor 1 It is replaced comprising the handle box including photoreceptor 1.

[embodiment]

Hereinafter, by embodiment, the present invention will be described in more detail.But the present invention is not appointed by scope of embodiments What is limited.

Prepare charge producing agent, cavity conveying agent, binding resin and electron transporting agent below, as the list for forming photoreceptor The material of stratotype photosensitive layer.

<1-1. charge producing agent>

Prepare compound (CGM-1X) as charge producing agent.Compound (CGM-1X) is chemical formula described in embodiment (CGM-1) metal-free phthalocyanine represented by.In addition, the crystalline texture of compound (CGM-1X) is X-type.

Prepare compound (2-1), (2-2) and (2-3) described in embodiment, as cavity conveying agent.Next, passing through Following methods measure the ionization potential of compound (2-1), (2-2) and (2-3).As a result, the ionization potential of compound (2-1) is 5.51eV.The ionization potential of compound (2-2) is 5.64eV.The ionization potential of compound (2-3) is 5.58eV.

The ionization potential of cavity conveying agent uses air atmosphere type Ultraviolet Photoelectron analytical equipment (Riken Meter Co., Ltd. Manufacture " AC-1 ") it measures.Measuring condition is as follows.

(measuring condition of ionization potential)

Measurement starts energy: 4.50eV

Measurement terminates energy: 6.20eV

Energy bite (gradient): 0.10eV

Gate time: 10

<1-3. binding resin>

Prepare resin (3-1a) and (3-2a) as binding resin.

Resin (3-1a) is polycarbonate resin represented by chemical formula described in embodiment (3-1).Resin (3- Viscosity average molecular weigh 1a) is 30000.

Resin (3-2a) is polycarbonate resin represented by chemical formula described in embodiment (3-2).Resin (3- Viscosity average molecular weigh 2a) is 30000.

<1-4. electron transporting agent>

Prepare compound (1-1)~(1-5) described in embodiment, as electron transporting agent.Compound (1-1)~(1- 5) it is manufactured respectively by following methods.

(manufacture of compound (1-1))

Compound (1-1) is manufactured according to following reactions (R-2).

[changing 22]

It reacts in (R-2), compound (A-1) is made to react to obtain compound (1-1) with compound (B-1).Hereinafter, sometimes will Compound (A-1) is recorded as the first raw material of reaction (R-2), and compound (B-1) is recorded as to the second raw material of reaction (R-2). By compound (B-1) 2.56g (0.02 mole), n,N-Dimethylformamide (DMF) 50mL and potassium carbonate 2.76g (0.02 mole) It is put into flask.The content of flask is stirred at 45 DEG C.Compound (A-1, the chloro- Isosorbide-5-Nitrae-of 2,3- bis- are added into flask Naphthoquinones) 2.27g (0.01 mole) DMF (30mL) solution.It is stirred 2 hours in content of the room temperature (25 DEG C) to flask.Then, Ion exchange water is added into flask.Then, the content of flask is filtered by suction, obtains crude product.By chloroform It is used as solvent with the mixed solvent (volume ratio 1: 1) of hexane, obtained crude product is mentioned by silica gel column chromatography It is pure.Obtain compound (1-1).The yield of compound (1-1) is 2.87g, and compound (1-1) comes from the yield of compound (A-1) For 70mol%.

(compound (1-2)~(1-5) manufacture)

Other than following aspects have altered, by method identical with manufacture compound (1-1), to manufacture compound (1-2) ~(1-5).The second raw material for reacting (R-2) is changed to shown in table 1 from the compound (B-1) in the manufacture of compound (1-1) Second raw material.The addition quality for reacting second raw material of (R-2) is changed to 1 institute of table from the 2.56g in the manufacture of compound (1-1) The addition quality of the second raw material shown.Also, mole of each raw material used in compound (1-2)~(1-5) manufacture Number is identical as the molal quantity of corresponding raw material used in the manufacture of compound (1-1).As a result, as the anti-of reaction (R-2) Product is answered, compound (1-2)~(1-5) is obtained, to replace compound (1-1).React compound (1-2) obtained in (R-2) The yield of~(1-5) is as shown in table 1.In addition, compound (1-2)~(1-5) carrys out the yield of the first raw material of autoreaction (R-2) such as Shown in table 1.

[table 1]

Compound (B-1)~(B-5) in table 1 is indicated by following chemical formula (B-1)~(B-5) respectively.

[changing 23]

Next, with¹H-NMR (proton NMR spectral instrument), to manufactured compound (1-1)~(1-5)¹H-NMR Spectrum measures.Magnetic field strength is set as 300MHz.Use deuterated chloroform (CDCl₃) it is used as solvent.Use tetramethylsilane (TMS) it is used as internal standard compound.

As the typical example in compound (1-1)~(1-5), measured compound (1-1)¹The change of H-NMR spectrum Chemical shift values are as follows.According to measured¹The chemical displacement value of H-NMR spectrum, which confirms, obtains compound (1-1).Its His compound (1-2)~(1-5) is similarly according to measured¹The chemical displacement value of H-NMR spectrum, confirms and obtains respectively Compound (1-2)~(1-5).

Compound (1-1):¹H-NMR (300MHz, CDCl₃) δ=8.11 (dd, 2H), 7.79 (dd, 2H), 7.18-7.24 (m, 4H), 6.81-6.86 (m, 4H).

Compound (E-1) and (E-2) are also prepared for as electron transporting agent.Compound (E-1) and (E-2) are respectively by following Chemical formula (E-1) and (E-2) are indicated.

[changing 24]

[changing 25]

Using the material for forming single-layer type photosensitive layer, to manufacture photoreceptor (P-1)~(P-22).

It is added into container as 2 mass parts of compound (CGM-1X) of charge producing agent, as the compound of cavity conveying agent (2-1) 50 mass parts, as 30 mass parts of compound (1-1) of electron transporting agent, as the resin (3-1a) 100 of binding resin Mass parts and 600 mass parts of tetrahydrofuran as solvent.With ball mill, the content of container is mixed 12 hours, material is made It is scattered in solvent.Single-layer type photosensitive layer coating fluid is obtained as a result,.Using dip coating, single-layer type photosensitive layer is applied with coating fluid Cloth is on the aluminum drum type supporter (diameter 30mm, overall length 238.5mm) as conductive base.The single-layer type sense that will be coated with Photosphere carries out 80 minutes heated-air dryings with coating fluid at 120 DEG C.Single-layer type photosensitive layer is formed on conductive base as a result, (30 μm of film thickness).Thus photoreceptor (P-1) is obtained.

<2-2. photoreceptor (P-2)~(P-22) manufacture>

Other than following aspects have altered, by method identical with manufacture photoreceptor (P-1), to manufacture photoreceptor respectively (P-2)~(P-22).The compound (1-1) used in manufacture as electron transporting agent of photoreceptor (P-1) is changed to shown in table 2 The electron transporting agent of type.Electron transporting agent relative to 100 mass parts of binding resin content (additive amount) from photoreceptor (P-1) Manufacture in 30 mass parts be changed to content shown in table 2 (additive amount).The used in manufacture of photoreceptor (P-1) is used as hole The compound (2-1) of agent delivery is changed to the cavity conveying agent of type shown in table 2.The conduct used in manufacture of photoreceptor (P-1) The resin (3-1a) of binding resin is changed to the binding resin of type shown in table 2.

Sensitivity characteristic is evaluated to manufactured photoreceptor (P-1)~(P-22) respectively.The evaluation of sensitivity characteristic is in temperature 23 DEG C and relative humidity 50%RH environment under carry out.Firstly, making to feel using drum sensitivity test machine (manufacture of GENTEC Co., Ltd.) The surface of body of light is charged to+600V.Then, using bandpass filter, monochromatic light (wavelength is taken out from the white light of halogen lamp 780nm, half width 20nm, 1.5 μ J/cm of light energy²).By the surface of the monochromatic light exposure of taking-up to photoreceptor.Irradiation is terminated The surface potential of photoreceptor when afterwards using 0.5 second measures.Using measured surface potential as sensitivity current potential (V_L, unit :+V is recorded as post-exposure electrical potential below).Post-exposure electrical potential (the V of measured photoreceptor_L) as shown in table 2.Separately Outside, post-exposure electrical potential (V_L) absolute value it is smaller, indicate that the sensitivity characteristic of photoreceptor is more excellent.

Respectively to the carried charge of manufactured photoreceptor (P-1)~(P-22) measurement calcium carbonate.

Hereinafter, the carbon referring again to Fig. 2, after illustrating photosensitive layer 3 (being equivalent to single-layer type photosensitive layer 3c) and calcium carbonate friction The measurement method of the carried charge of sour calcium.The carried charge of calcium carbonate passes through following first steps, second step, third step and the Four steps measures.The measurement of the carried charge of calcium carbonate uses fixture 10.

Fixture 10 has: the first base station 12, shaft 14, rotary driving part 16 (for example, motor) and the second base station 18.Rotation Driving portion 16 rotates shaft 14.Shaft 14 is pivoted about with the rotary shaft S of shaft 14.First base station 12 and shaft 14 It is integrated, is pivoted about with rotary shaft S.Second base station 18 is not rotated and is fixed.

(first step)

In first step, prepare 2 photosensitive layers 3.Hereinafter, it is recorded as the first photosensitive layer 30 by one of 2 photosensitive layers 3, it is another It is a to be recorded as the second photosensitive layer 32.Firstly, preparing the first film 20, which has the first sense that film thickness L1 is 30 μm Photosphere 30.Also, prepare the second film 22, which has the second photosensitive layer 32 that film thickness L2 is 30 μm.Specifically, The first film 20 and the second film 22 use overhead projector (OHP) film.The size of the first film 20 and the second film 22 is each From the circle for diameter 3cm.The list used respectively in coating manufacture photoreceptor (P-1) on the first film 20 and the second film 22 Stratotype photosensitive layer coating fluid.By the single-layer type photosensitive layer coating fluid being coated with 120 DEG C heated-air drying 80 minutes.As a result, It obtains the first film 20 for having the first photosensitive layer 30 and has the second film 22 of the second photosensitive layer 32.

(second step)

In second step, the calcium carbonate of 0.007g is placed on the first photosensitive layer 30.As a result, on the first photosensitive layer 30 formed by The calcium carbonate layer 24 that calcium carbonate is constituted.Then, the second photosensitive layer 32 is loaded in calcium carbonate layer 24.The specific process of second step As described below.

Firstly, the first film 20 is fixed on the first base station 12 with double-sided adhesive.The first sense that the first film 20 has The calcium carbonate of 0.007g is loaded on photosphere 30.The calcium carbonate layer 24 being made of calcium carbonate is formed on the first photosensitive layer 30 as a result,. The second film 22 is fixed on the second base station 18 with double-sided adhesive, so that calcium carbonate layer 24 is contacted with the second photosensitive layer 32.As a result, by Under supreme configure in order the first base station 12, the first film 20, the first photosensitive layer 30, calcium carbonate layer 24, the second photosensitive layer 32, second Film 22 and the second base station 18, and it is configured to the first base station 12, the first film 20, the first photosensitive layer 30, the second photosensitive layer 32, Two films 22 and the respective center of the second base station 18 pass through rotary shaft S.

(third step)

In third step, in the environment of 23 DEG C of temperature and relative humidity 50%RH, in the state that the second photosensitive layer 32 is fixed Under, the first photosensitive layer 30 is rotated 60 seconds with revolving speed 60rpm.Specifically, rotary driving part 16 is driven, make shaft 14, First base station 12, the first film 20 and the first photosensitive layer 30 were centered on rotary shaft S, with revolving speed 60rpm rotation 60 seconds.By This, the calcium carbonate contained in calcium carbonate layer 24 is rubbed between the first photosensitive layer 30 and the second photosensitive layer 32, thus carbon Sour calcium electrification.

(four steps)

In four steps, the calcium carbonate that has charged in third step is taken out from fixture 10, and with electric quantity measuring device (drawing-in type Small-sized electric quantity measuring device, TREK company manufacture " MODEL 212HS ") it is aspirated.With electric quantity measuring device, to being taken out The total electricity Q (unit :+μ C) and mass M (unit: g) of the calcium carbonate of suction are measured.According to formula " carried charge=Q/M ", meter Calculate the carried charge (amount of being charged by friction, unit :+μ C/g) of calcium carbonate.

The carried charge of calcium carbonate is other than changing following aspects in each photoreceptor (P-2)~(P-22), by with survey The identical method of carried charge for measuring the calcium carbonate of photoreceptor (P-1) is evaluated.In first step, manufacture photoreceptor (P- is used 2) used each single-layer type photosensitive layer coating fluid when~(P-22), come used when replacing manufacture photoreceptor (P-1) Single-layer type photosensitive layer coating fluid.

It is as shown in table 2 to the carried charge of photoreceptor (P-1)~(P-22) calcium carbonate calculated respectively.Also, calcium carbonate Carried charge is bigger positive value, indicates that the calcium carbonate the easy to be positively charged relative to the first photosensitive layer 30 and the second photosensitive layer 32.

Picture characteristics is evaluated to manufactured photoreceptor (P-1)~(P-22) respectively.The evaluation of picture characteristics 32.5 DEG C of temperature, It is carried out under relative humidity 85%RH environment.Valuator device uses image forming apparatus (Kyocera Document Solutions Inc.'s system Make the modified machine of " monochrome printers FS-1300D ").Specifically, it transform non-contact visualization way as contact visualization way.It will Scraper plate cleaning way transform cleaner-less mode as.It transform grid corona tube charger as charged roller.By the electrification of charged roller Polarity set is positive polarity.Also, the image forming apparatus is using direct transfer modes.Recording medium uses kyocera " kyocera office information system brand paper VM-A4 " (A4 size) is sold by office information system Co., Ltd..The evaluation of valuator device It uses monocomponent toner (trial production sample).

With valuator device, under conditions of revolving speed 168mm/ seconds of photoreceptor, the continuous printing in 20000 recording mediums Image I (image of printing coverage rate 1%).Then, image II (the solid black figure of A4 size is printed in 1 recording medium Picture).It detects by an unaided eye and forms the recording medium of image II, the white point quantity occurred in image II is counted.Record is situated between The minor constituent (for example, paper powder) of matter adheres to more on photoreceptor, and often the number of the white point in image II is more.Figure As the white point number occurred in II is as shown in table 2.

In table 2, HTM, ETM and V_LRespectively indicate cavity conveying agent, electron transporting agent and post-exposure electrical potential.ETM content (adds Dosage) indicate content (additive amount) of the electron transporting agent relative to the binding resin of 100 mass parts.

[table 2]

The photosensitive layer of photoreceptor (P-1)~(P-14) and (P-19)~(P-22) are containing charge producing agent, binding resin And the single-layer type photosensitive layer of compound (1).Specifically, any containing compound (1-1)~(1-5) contained by general formula (1) It is a kind of.After photosensitive layer and calcium carbonate friction, the carried charge of calcium carbonate is+7.0 μ C/g or more.Therefore, from table 2 it is known that this In a little photoreceptors, the number for forming white point in image is few, it is suppressed that the generation of white point.In addition, not damaged in these photoreceptors In the case where the sensitivity characteristic of photoreceptor, it will be able to inhibit to form the generation of white point in image.

In photoreceptor (P-1)~(P-14) and (P-19)~(P-22), photoreceptor (P-1)~(P-10) and (P-19)~ (P-22) photosensitive layer contains compound (2-1) as cavity conveying agent.Therefore, from table 2 it is known that photoreceptor (P-1) Compared with photoreceptor (P-11)~(P-14), the absolute value of post-exposure electrical potential is small, photosensitive by~(P-10) and (P-19)~(P-22) It is especially excellent to spend characteristic.Also, photoreceptor (P-1)~(P-10) and (P-20)~(P-22) and photoreceptor (P-11)~(P-14) It compares, the number for forming white point in image is few, especially inhibits the generation of white point.

On the other hand, photoreceptor (P-15)~(P-18) photosensitive layer is free of compound (1).Compound (E-1) is not logical Compound contained in formula (1).Specifically, compound (E-1) does not have halogen atom.In addition, compound (E-2) is not general formula (1) compound contained by.Specifically, compound (E-2) has halogen atom, without the compound indicated by general formula (1) Skeleton.In addition, the carried charge of calcium carbonate is less than+7.0 μ C/g in photoreceptor (P-15)~(P-18) photosensitive layer.Therefore, from For table 2 it is known that in these photoreceptors, the number for forming white point in image is more, and cannot inhibit to form the production of white point in image It is raw.

In conclusion photoreceptor involved in the present invention is able to suppress the generation to form white point in image.Also, institute of the present invention The handle box and image forming apparatus that are related to are able to suppress the generation to form white point in image.

(industrial availability)

Photoreceptor involved in the present invention can be used in image forming apparatus.Handle box and image involved in the present invention form dress Setting can be used to form image on the recording medium.

Claims

1. a kind of Electrophtography photosensor, has conductive base and photosensitive layer, which is characterized in that

The photosensitive layer is the single-layer type photosensitive layer containing charge producing agent and electron transporting agent,

The electron transporting agent includes the compound indicated by the following general formula (1),

After the photosensitive layer and calcium carbonate friction, the carried charge of the calcium carbonate is+7.0 μ C/g or more,

[changing 1]

In the general formula (1),

R₁And R₂It is respectively independent, it indicates halogen atom, the C1-C8 alkyl with 1 or more halogen atom, there is 1 or more halogen The C3-C10 naphthenic base of atom, has 1 or more at the C6-C14 aryl with 1 or more halogen atom and with C1-C6 alkyl The C6-C14 aryl of halogen atom or C7-C20 aralkyl with 1 or more halogen atom,

P and q is respectively independent, indicates 1 or more 5 integer below.

2. Electrophtography photosensor according to claim 1, which is characterized in that

In the general formula (1), R₁And R₂It is respectively independent, indicate halogen atom.

3. Electrophtography photosensor according to claim 1, which is characterized in that

In the general formula (1), base represented by the following general formula (4) and base phase represented by the following general formula (5) are same,

[changing 2]

[changing 3]

In the general formula (4),

R₁Indicate halogen atom, the C1-C8 alkyl with 1 or more halogen atom, the C3-C10 with 1 or more halogen atom Naphthenic base, the C6-C14 aryl with 1 or more halogen atom, with 1 or more halogen atom and with C1-C6 alkyl C6-C14 aryl or C7-C20 aralkyl with 1 or more halogen atom,

P indicates 1 or more 5 integer below,

Y₁Indicate binding site,

In the general formula (5),

R₂Indicate halogen atom, the C1-C8 alkyl with 1 or more halogen atom, the C3-C10 with 1 or more halogen atom Naphthenic base, the C6-C14 aryl with 1 or more halogen atom, with 1 or more halogen atom and with C1-C6 alkyl C6-C14 aryl or C7-C20 aralkyl with 1 or more halogen atom,

And R₂Expression and R₁Identical base,

Q indicates 1 or more 5 integer below, and q indicates integer identical with p,

Y₂Indicate binding site.

4. Electrophtography photosensor according to claim 1, which is characterized in that

In the general formula (1), p and q are respectively independent, indicate 3 or more 5 integers below.

5. Electrophtography photosensor according to claim 1, which is characterized in that

It by the compound that the general formula (1) indicates is indicated by following chemical formula (1-1), (1-2), (1-3), (1-4) or (1-5) Compound,

[changing 4]

6. Electrophtography photosensor according to claim 1, which is characterized in that

The photosensitive layer also contains cavity conveying agent,

The ionization potential of the cavity conveying agent is 5.35eV or more 5.55eV or less.

7. Electrophtography photosensor according to claim 1, which is characterized in that

The photosensitive layer also contains cavity conveying agent,

The cavity conveying agent by following chemical formula (2-1) indicate,

[changing 5]

8. Electrophtography photosensor according to claim 1, which is characterized in that

The photosensitive layer also contains binding resin,

Relative to the binding resin of 100 mass parts, the content of the compound indicated by the general formula (1) be 20 mass parts with Upper 40 below the mass.

9. Electrophtography photosensor according to claim 1, which is characterized in that

The photosensitive layer also contains binding resin, and the binding resin includes the resin indicated by the following general formula (3),

[changing 6]

In the general formula (3),

R₃₁~R₃₆It is respectively independent, indicate hydrogen atom, C1-C6 alkyl or C6-C14 aryl,

R₃₅With R₃₆Can be bonded to each other indicates C5-C7 cycloalkylidene,

M indicates 0.00 or more 0.90 number below,

N indicates 0.10 or more 1.00 number below,

M+n=1.00.

10. a kind of handle box,

Has Electrophtography photosensor described in claim 1.

11. a kind of image forming apparatus,

Have Electrophtography photosensor, electro-mechanical part, exposure portion, development section and transfer section described in claim 1,

The electro-mechanical part charges the surface of the Electrophtography photosensor,

The exposure portion makes the surface exposure of the Electrophtography photosensor after electrification, in the Electrophtography photosensor The surface formed electrostatic latent image,

The latent electrostatic image developing is toner image by the development section,

The toner image is transferred to recording medium from the Electrophtography photosensor by the transfer section,

When the toner image is transferred to the recording medium from the Electrophtography photosensor by the transfer section, the electronics Electrophotographic photoconductor is contacted with the recording medium.

12. image forming apparatus according to claim 11, which is characterized in that

The latent electrostatic image developing is the toner while contacting with the Electrophtography photosensor by the development section Picture.

13. image forming apparatus according to claim 11, which is characterized in that

The development section cleans the surface of the Electrophtography photosensor.

14. image forming apparatus according to claim 11, which is characterized in that

The electro-mechanical part is charged roller.

15. image forming apparatus according to claim 11, which is characterized in that

The electro-mechanical part charges the surface of the Electrophtography photosensor at positive polarity.