CN101470363A

CN101470363A - Single layer type electrophotograph photoreceptor and image forming apparatus

Info

Publication number: CN101470363A
Application number: CNA2008101864655A
Authority: CN
Inventors: 浜崎一也; 冈田英树; 岩下裕子; 市口哲也; 宍户真
Original assignee: Kyocera Mita Corp
Current assignee: Kyocera Document Solutions Inc
Priority date: 2007-12-28
Filing date: 2008-12-19
Publication date: 2009-07-01
Anticipated expiration: 2028-12-19
Also published as: CN101470363B; JP5395353B2; JP2009162829A

Abstract

The present invention provides a single layer type electronic photographic photoreceptor and an image forming device. The single layer type electronic photographic photoreceptor comprises a substrate and a single layer photosensitive layer which comprises charging generating agent, hole transporting agent, electron transporting agent and adhesive. The hole transporting agent is the compound represented by the right formula (1). The solubility of the electron transporting agent in tetrahydrofuran is 27-50% by weight in the condition of 25 DEG C. In the general formula (1), Ar<1> represents the aryl with single ring or 2-4 rings. Ar<2> represents phenylene, naphthylene, biphenylene or anthrylene. X<1> represents hydrogen, alkyl with 1-4 carbon atoms, or aryl with single ring or 2-4 rings. Y<1> represents aryl with single ring or 2-4 rings. Therefore, the membranization and block spot are restrained. Furthermore the charge transporting capability possessed by the electron transporting agent is fully exerted.

Description

Mono-layer electronic photographic photoreceptor and image processing system

Technical field

The present invention relates to mono-layer electronic photographic photoreceptor and image processing system with described photoreceptor.

Background technology

The Electrophtography photosensor that is used for image processing system etc. uses Organophotoreceptor, and described Organophotoreceptor has the photographic layer that is made of photoreceptor materials such as binding resin, charge generation agent and charge transport agent.Such Organophotoreceptor is compared with inorganic photoreceptor, make easily, and the selection of various photoreceptor materials is varied, so have the high advantage of structural design degree of freedom.

On the other hand, in order stably to form high quality graphic, the organic material that uses in Organophotoreceptor will satisfy various conditions.Charge transport agent such as particularly cavity conveying agent (below, abbreviate HTM sometimes as) and electron transporting agent (below, abbreviate ETM sometimes as) will be satisfied: (i) to light and thermally stable; (ii) stable to the materials such as ozone that produce by corona discharge; (iii) has high delivered charge ability; (iv) with the intermiscibility height of organic solvent and binding resin; And (v) make easily and various conditions such as cheap.

As satisfying described various condition, cavity conveying agent that particularly the delivered charge ability is good, for example patent documentation D1 (No. 3897838, Japanese patent gazette) discloses the indane compound with following general formula (22) expression.

In the general formula (22): Ar ³The aryl of expression monocycle or 2～4 rings, this aryl can be non-substituted aryls or can be that to have carbon number as substituting group be that 1～4 alkyl, carbon number are that 1～4 alkoxy, carbon number are the aryl of 5～6 naphthenic base, benzyl, phenyl or halogen atom; Ar ⁴Expression phenylene (penylene base, phenylene group), naphthylene (naphthylene base, naphthylene group), biphenylene (biphenylene base, biphenylene group) or anthrylene (anthracene support base, anthrylene group), described each base can be non-substituting group or can be that to have carbon number as substituting group be that 1～4 alkyl, carbon number are 1～4 the alkoxy or the base of halogen atom; X ²Expression hydrogen atom, carbon number are 1～4 the alkyl or the aryl of monocycle or 2～4 rings, and this aryl can be non-substituted aryl or can be that to have carbon number as substituting group be that 1～4 alkyl, carbon number are that 1～4 alkoxy, carbon number are the aryl of 5～6 naphthenic base, benzyl, phenyl or halogen atom; Y ²The aryl of expression monocycle or 2～4 rings, this aryl can be non-substituted aryl or can be as substituting group have carbon number be 1～4 alkyl, carbon number be 1～4 alkoxy, carbon number be 5～6 naphthenic base, benzyl, phenyl, halogen atom, with 1 valency base of following formula (23) expression or the substituent aryl of representing with following general formula (24).

In the general formula (24): R ¹³Expression hydrogen atom, carbon number are that 1～4 alkyl or carbon number are 1～4 lower alkoxy; R ¹⁴Expression hydrogen atom, halogen atom or carbon number are 1～4 alkyl; Z ²The aryl of expression hydrogen atom or monocycle or 2～4 rings, this aryl can be non-substituted aryls or can be that to have carbon number as substituting group be that 1～4 alkyl, carbon number are that 1～4 alkoxy, carbon number are the aryl of 5～6 naphthenic base, benzyl, phenyl or halogen atom; Replace radix o and p and represent 0～4 integer.

In the described invention of patent documentation D1, about the combination of described indane compound and electron transporting agent, without any research.Therefore even described indane compound is used as the cavity conveying agent, constitute mono-layer electronic photographic photoreceptor, might be owing to the kind of the electron transporting agent that is used in combination with described cavity conveying agent, the significantly reduced problem of generation sensory characteristic.

In addition, described indane compound is being used as the cavity conveying agent, constituting under the situation of mono-layer electronic photographic photoreceptor, reducing the character of surface of photographic layer easily, under the situation of carrying out image formation under the hot and humid condition, on the photographic layer surface, be easy to generate the tendency of membranization especially.Its result causes being easy to generate blackspot on the image that forms.

Therefore seek a kind of like this mono-layer electronic photographic photoreceptor, can suppress membranization and consequent blackspot, can more effectively bring into play the good delivered charge ability that the charge transport agent has in addition.

Summary of the invention

The object of the present invention is to provide a kind of mono-layer electronic photographic photoreceptor and image processing system, no matter under the environment for use of common temperature humidity, still under hot and humid environment for use, can be suppressed at effectively on the photographic layer surface produce membranization and cause thus on the image that forms, produce blackspot, can also bring into play the good delivered charge ability of cavity conveying agent effectively, stably keep sensory characteristic with ad hoc structure.

The invention provides a kind of mono-layer electronic photographic photoreceptor, described mono-layer electronic photographic photoreceptor comprises: matrix; With the individual layer photographic layer that on described matrix, is provided with; Wherein, described photographic layer comprises charge generation agent, cavity conveying agent, electron transporting agent and binding resin, described cavity conveying agent is the compound with following general formula (1) expression, and described electron transporting agent is 27～50 quality % to tetrahydrofuran (THF) 25 ℃ solubleness.

In the general formula (1), Ar ¹The aryl of expression monocycle or 2～4 rings, this aryl can be non-substituted aryl or can be that to have carbon number as substituting group be that 1～4 alkyl, carbon number are that 1～4 alkoxy, carbon number are the aryl of 5～6 naphthenic base, benzyl, phenyl or halogen atom, Ar ²Expression phenylene, naphthylene, biphenylene or anthrylene, described each base can be non-substituting groups or can be that to have carbon number as substituting group be that 1～4 alkyl, carbon number are 1～4 the alkoxy or the base of halogen atom, X ¹Expression hydrogen atom, carbon number are 1～4 alkyl or monocycle or 2～4 aryl that encircle, this aryl can be non-substituted aryl or can be that to have carbon number as substituting group be that 1～4 alkyl, carbon number are that 1～4 alkoxy, carbon number are the aryl of 5～6 naphthenic base, benzyl, phenyl or halogen atom, Y ¹The aryl of expression monocycle or 2～4 rings, this aryl can be non-substituted aryls or can be that to have carbon number as substituting group be that 1～4 alkyl, carbon number are that 1～4 alkoxy, carbon number are 5～6 naphthenic base, benzyl, phenyl, halogen atom or the substituent aryl of representing with following general formula (2).

In the general formula (2), R ¹Expression hydrogen atom, carbon number are that 1～4 alkyl or carbon number are 1～4 alkoxy, R ²Expression hydrogen atom, halogen atom or carbon number are 1～4 alkyl, Z ¹The aryl of expression hydrogen atom or monocycle or 2～4 rings, this aryl can be non-substituted aryl or can be that to have carbon number as substituting group be that 1～4 alkyl, carbon number are that 1～4 alkoxy, carbon number are the aryl of 5～6 naphthenic base, benzyl, phenyl or halogen atom, replace radix m and n and represent 0～4 integer.

The present invention also provides a kind of image processing system, and described image processing system comprises: image carrier; Charging system is used to make described image carrier surface charging; Exposure device is used to make described image carrier face exposure, forms electrostatic latent image; Developing apparatus is used to make described electrostatic latent image to develop as the toner picture; And transfer device, be used for described toner picture is transferred to from described image carrier and be transferred part; Wherein, described image carrier is described mono-layer electronic photographic photoreceptor.

According to the present invention, under the environment for use of common temperature humidity, still under hot and humid environment for use, all be suppressed at effectively on the photographic layer surface produce membranization and cause thus on the image that forms, produce blackspot, and performance has the good delivered charge ability of the cavity conveying agent of ad hoc structure, stably keeps sensory characteristic effectively.

Description of drawings

Figure 1A is the sectional view of an example of the mono-layer electronic photographic photoreceptor 10 of schematic representation first embodiment of the invention.

Figure 1B is the sectional view of another example of the mono-layer electronic photographic photoreceptor 10 of schematic representation first embodiment of the invention.

Fig. 2 is the solubleness of expression electron transporting agent and the curve map that produces the relation of blackspot number.

Fig. 3 is the curve map that expression produces the relation of blackspot number and dissolving the separate out amount of cavity conveying agent from photographic layer.

Fig. 4 is the content of expression electron transporting agent and the curve map that produces the relation of blackspot number.

Fig. 5 is the integrally-built sectional drawing of the image processing system of schematic representation second embodiment of the invention.

Embodiment

The inventor finds in mono-layer electronic photographic photoreceptor, the compound that has ad hoc structure by use is as the cavity conveying agent, and use the electron transporting agent of solubleness in specialized range, can improve the character of surface of photographic layer effectively the regulation solvent.

In view of the above, the inventor finds that following Electrophtography photosensor is no matter under the environment for use of common temperature humidity, still carrying out image under hot and humid environment for use forms, can be suppressed at effectively on the photographic layer surface produce membranization and cause thus produce blackspot forming on the image, and can stably keep sensory characteristic.

(first embodiment 〉

The individual layer photographic layer that the mono-layer electronic photographic photoreceptor of first embodiment of the invention comprises matrix and is provided with on described matrix, described photographic layer comprises charge generation agent, cavity conveying agent, electron transporting agent and binding resin, described cavity conveying agent is that described electron transporting agent is 27～50 quality % to the solubleness of tetrahydrofuran under 25 ℃ with the compound of following general formula (1) expression.

Mono-layer electronic photographic photoreceptor to present embodiment is specifically described below.

1. basic comprising

Shown in Figure 1A and Figure 1B, the mono-layer electronic photographic photoreceptor 10 of present embodiment is provided with single photographic layer 14 on matrix 12.That is, described photographic layer 14 is that charge generation agent, cavity conveying agent, electron transporting agent and binding resin are included in the photographic layer in one deck.In addition, described photographic layer 14 contains as the compound with ad hoc structure cavity conveying agent, that narrate later, and contain as electron transporting agent, to the compound of solubleness in specialized range of regulation solvent.Figure 1A and Figure 1B are the sectional views of an example of the mono-layer electronic photographic photoreceptor 10 of schematic representation present embodiment.

The mono-layer electronic photographic photoreceptor of present embodiment can be the mono-layer electronic photographic photoreceptor 10 that the matrix 12 shown in Figure 1A is provided with photographic layer 14, also can be having matrix 12 and photographic layer 14 and be formed with the mono-layer electronic photographic photoreceptor 10 ' in middle layer 16 in the scope of not destroying the photoreceptor characteristic between matrix 12 and photographic layer 14 shown in Figure 1B.Middle layer 16 can also can be two-layer above layer for individual layer.

, be not particularly limited as long as constitute as described matrix by various materials with electric conductivity.Constitute having that the material of described matrix can exemplify: the metal of iron, aluminium, copper, tin, platinum, silver, vanadium, molybdenum, chromium, cadmium, titanium, nickel, palladium, indium, stainless steel or brass etc.; The plastic material of evaporation or stacked described metal; Cover the glass of silver iodide, tin oxide or indium oxide etc.; And the plastic material that the dispersion of electrically conductive microparticles such as carbon black is constituted; Or the like.

The shape of described matrix is corresponding with the structure of the image processing system of use, can be arbitrary shapes such as sheet, drum type, as long as matrix itself has electric conductivity or matrix surface to have electric conductivity just passable.

Described base shape is being made under the situation of drum type, preferably made its external diameter in the scope of 10～25mm.External diameter by making described matrix can help to make the image processing system miniaturization in this scope.Have that the Electrophtography photosensor of matrix of such external diameter is general to produce membranization easily on the photographic layer surface, but be used as photographic layer by having the photographic layer of narrating later, can be suppressed at effectively membranization on the photographic layer surface and cause thus produce blackspot forming on the image.Although the external diameter of matrix is done smallerly, also can be suppressed at effectively on the photographic layer surface and produce membranization, be described in detail in the photographic layer part of back about its reason.

2. photographic layer

(1) cavity conveying agent

(1)-a kind

The mono-layer electronic photographic photoreceptor of present embodiment is characterised in that, with the compound of following general formula (1) expression as the cavity conveying agent.

In the general formula (1), Ar ¹The aryl of expression monocycle or 2～4 rings, this Ar ¹Aryl can be non-substituted aryl or can be that to have carbon number as substituting group be that 1～4 alkyl, carbon number are that 1～4 alkoxy, carbon number are the aryl of 5～6 naphthenic base, benzyl, phenyl or halogen atom, Ar ²Expression phenylene, naphthylene, biphenylene or anthrylene, described phenylene, naphthylene, biphenylene and anthrylene independently can be respectively non-substituting groups or can be that to have carbon number as substituting group be that 1～4 alkyl, carbon number are 1～4 the alkoxy or the base of halogen atom, X ¹Expression hydrogen atom, carbon number are 1～4 alkyl or monocycle or 2～4 aryl that encircle, the aryl of this X1 can be non-substituted aryl or can be that to have carbon number as substituting group be that 1～4 alkyl, carbon number are that 1～4 alkoxy, carbon number are the aryl of 5～6 naphthenic base, benzyl, phenyl or halogen atom, Y ¹The aryl of expression monocycle or 2～4 rings, this Y ¹Aryl can be non-substituted aryl or can be that to have carbon number as substituting group be that 1～4 alkyl, carbon number are that 1～4 alkoxy, carbon number are 5～6 naphthenic base, benzyl, phenyl, halogen atom or with the substituent aryl of following general formula (2) expression.

In the general formula (2), R ¹Expression hydrogen atom, carbon number are that 1～4 alkyl or carbon number are 1～4 alkoxy, R ²Expression hydrogen atom, halogen atom or carbon number are 1～4 alkyl, Z ¹The aryl of expression hydrogen atom or monocycle or 2～4 rings, this Z ¹Aryl can be non-substituted aryl or can be that to have carbon number as substituting group be that 1～4 alkyl, carbon number are that 1～4 alkoxy, carbon number are the aryl of 5～6 naphthenic base, benzyl, phenyl or halogen atom, replace radix m and n and represent 0～4 integer.

Because the compound with ad hoc structure with described general formula (1) expression has good conveying hole ability and ozone resistance, so can improve the electrical specification based on the sensory characteristic of Electrophtography photosensor effectively.

Have the compound of this ad hoc structure, because of the electron transporting agent that is used in combination, sensory characteristic can occur and significantly reduce, perhaps the character of surface of photographic layer significantly reduces, and membranization also produces the situation of blackspot thus easily.

In this respect, as described later, the mono-layer electronic photographic photoreceptor of present embodiment is by using the compound of solubleness in specialized range to the regulation solvent as electron transporting agent, can solve effectively that sensory characteristic reduces and the problem of the generation blackspot that caused by membranization.

Can think that this effect is the cavity conveying agent by having ad hoc structure and has interaction special between the electron transporting agent of regulation solubleness and obtain, and partly describes about the electron transporting agent of concrete effect in the back.

(1)-2 object lesson

For example can exemplify the compound (HTM-1～5) represented with following formula (6)～(10) etc. with the object lesson of the compound of described general formula (1) expression.

(1)-3 synthetic example

As synthetic example, the synthetic method of the compound (HTM-3) represented with described formula (8) is described with the compound of described general formula (1) expression.

At first 4 of 24.4g (0.085 mole)-(N, N-diphenyl amino) indane is dissolved in 130 milliliters N, in N-dimethyl formamide, at room temperature with 30 minutes the 19.5g that drips (0.13 mole) phosphoryl chloride phosphorus oxychloride, be warmed up to 50 ℃ and stirred 3 hours.After reaction ends,, stir behind the injection reactant liquor the solution that 93% dissolution of sodium hydroxide of 40g (0.93 mole) is obtained in 600 ml waters.The toluene that adds 300 milliliters again; after extracting target substance; wash and concentrate, can obtain 4 of about 24.9g-[N-(4-formoxyl phenyl)-N-phenyl amino] indane (4-[N-(4-formyphenyl)-N-phenylamino] indan).

Then p-methyl-benzyl diethyl phosphonate of 4-[N-(4-formoxyl phenyl)-N-phenyl amino] indane of the 6.27g (0.02 mole) that obtains and 5.8g (0.024 mole) is dissolved in 40 milliliters the tetrahydrofuran; at room temperature with behind the potassium tert-butoxide that added 2.9g (0.026 mole) in 30 minutes; stirred again 2 hours; after confirming that formylation compound (formyl compound) disappears, finish reaction.

The methyl alcohol of the reactant that obtains 240 milliliters of injections below 5 ℃, the water that splashes into 40 milliliters is again separated out crystallization then.The crystallization that obtains filter, with methanol wash with to wash the back dry, make with extra care with column chromatography again, can obtain 4 of about 5.4g-{ N-[4-(4-methyl styrene base) phenyl]-N-phenyl amino } indane (4-{ N-[4-(4-methylstyryl) phenyl]-N-phenylamino}indan), promptly use the compound (HTM-3) of formula (8) expression.

(1)-4 dissolves the amount of separating out

On matrix, form the resin bed of the compound that contains useful general formula (1) expression, under situation about the matrix of this formation resin bed be impregnated in the olein, more particularly: resin bed is the polycarbonate resin with respect to 100 mass parts, contains the compound compositions of 80 mass parts with general formula (1) expression; Resin layer thickness is 30 μ m; The external diameter of matrix is 30mm; The axial direction length (steeping length) of matrix is 40mm; The amount of olein is 30g; Fluid temperature is 25 ℃; Dip time is under 20 hours the situation, preferably, with the compound of general formula (1) expression with respect to the dissolving amount of separating out of olein in the scope of 1～10mg.

By the dispersiveness that makes the dissolving amount of separating out in the cavity conveying agent that has ad hoc structure under the rated condition in described scope, can improve the cavity conveying agent itself that in photographic layer, has ad hoc structure to be had.That is, if very few with the dissolving amount of separating out of the compound of general formula (1) expression, then the intermiscibility with respect to organic material excessively reduces, and is difficult to sometimes disperse fully in photographic layer.If too much with the dissolving amount of separating out of the compound of general formula (1) expression in addition, dispersed insufficient in photographic layer then is so separate out from the photographic layer surface dissolution easily with respect to olein.

Therefore, preferably, the dissolving amount of separating out of the compound of representing with general formula (1) under rated condition is in the scope of 3～7mg, more preferably in the scope of 4～6mg.

(1)-5 content

Preferably, with respect to the binding resin in the photographic layer of 100 mass parts with the content of compound of general formula (1) expression in the scope of 20～120 mass parts.

If the content with the compound of general formula (1) expression is very few, then in Electrophtography photosensor, be difficult to obtain enough sensory characteristics sometimes; On the other hand, if too much,, in photographic layer, also be difficult to sometimes disperse fully even then use at the same time under the situation of electron transporting agent with predetermined characteristic with the content of the compound of general formula (1) expression.

Therefore, preferably, with respect to the binding resin in the photographic layer of 100 mass parts with the content of compound of general formula (1) expression in the scope of 30～100 mass parts, more preferably in the scope of 50～100 mass parts.

(2) electron transporting agent

(2)-1 solubleness

The mono-layer electronic photographic photoreceptor of present embodiment is characterised in that, described electron transporting agent with respect to the solubleness of tetrahydrofuran (THF) (measure temperature: 25 ℃) in the scope of 27～50 quality %.

By using the compound of representing by general formula (1) as the cavity conveying agent with ad hoc structure, and make electron transporting agent with respect to the solubleness of regulation solvent scope, can improve the dispersiveness of the compound with ad hoc structure in photographic layer of representing with general formula (1) effectively in regulation.

Promptly, electron transporting agent with regulation solubleness, utilize special interaction with the compound of representing with general formula (1), function can be brought into play, the dispersiveness of compound in photographic layer can be improved effectively with general formula (1) expression as the dispersing aid of described compound (cavity conveying agent).

Its result, owing to can improve the character of surface of photographic layer effectively, so no matter under the environment for use of common temperature humidity, still under hot and humid environment for use, can be suppressed at effectively produce on the surface of photographic layer membranization and cause thus on the formation image, produce blackspot.

In addition,, the good conveying hole ability that the compound represented with general formula (1) had originally and the characteristic of ozone resistance can be brought into play effectively, good sensory characteristic can be kept effectively by improving the dispersiveness of charge transport agent in photographic layer.

More particularly, if electron transporting agent is low excessively with respect to the solubleness of tetrahydrofuran, then be difficult to give full play to and use the special interaction of the compound of general formula (1) expression, the generation blackspot that is difficult to suppress membranization sometimes and causes thus.On the other hand,,, be difficult to guarantee the electron mobility stipulated sometimes, or the physical strength of photographic layer is low excessively sometimes though then can improve the dispersiveness of compound with general formula (1) expression if electron transporting agent is too high with respect to the solubleness of tetrahydrofuran.

Therefore, more preferably, electron transporting agent with respect to the solubleness of tetrahydrofuran in the scope of 27～40 quality %, further preferably in the scope of 27～35 quality %.

Electron transporting agent is to be illustrated under 25 ℃ the condition with respect to the solubleness of tetrahydrofuran, the amount (g) of the electron transporting agent to greatest extent that can dissolve with respect to the tetrahydrofuran of 100g.

With Fig. 2 electron transporting agent is described with respect to the solubleness of tetrahydrofuran with in the relation that forms generation blackspot number on the image below.

Fig. 2 is the solubleness of expression electron transporting agent and the curve map that produces the relation of blackspot number.Transverse axis is represented electron transporting agent with respect to the solubleness (quality %) of tetrahydrofuran (THF) under 25 ℃ mensuration temperature, and the longitudinal axis is illustrated in and forms the blackspot number (individual/A4 paper) that produces on the image.Wherein family curve A is to use the family curve of compound (HTM-3) during as the cavity conveying agent of promptly using formula (8) expression by example of compound of general formula (1) expression, and family curve B is to use the family curve of compound (HTM-6) during as the cavity conveying agent of promptly using following formula (11) expression by the compound beyond the compound of general formula (1) expression.

In addition, the content of each cavity conveying agent is 50 mass parts with respect to the binding resin of 100 mass parts respectively, and the content of electron transporting agent is 30 mass parts with respect to the binding resin of 100 mass parts.

Other are narrated in the embodiment of back about the formation of detailed Electrophtography photosensor and the condition determination of generation blackspot number etc.

From family curve A as can be known, under the situation of compound as the cavity conveying agent of using by general formula (1) expression, the solubleness increase with electron transporting agent produces the blackspot number and sharply reduces.More particularly, be increased to 27 quality % from 20 quality %, produce the blackspot number from sharply reducing to about 50/A4 paper more than at least 200/A4 paper with the solubleness of electron transporting agent.And, in the scope of the solubleness of electron transporting agent more than 27 quality %, can make to produce the blackspot number and stably remain in the scope about 50/A4 paper.

On the other hand, from family curve B as can be known, under using, even the solubleness of electron transporting agent changes, to producing the also not special influence of blackspot number by the situation of compound beyond the compound of general formula (1) expression as the cavity conveying agent.More particularly,, produce the blackspot number all in the scope about 200/A4 paper, can not suppress the blackspot number that produces effectively regardless of the solubleness of electron transporting agent.

Therefore, by family curve A and family curve B as can be known, having the cavity conveying agent of ad hoc structure and having under the situation that the electron transporting agent of regulation solubleness is used in combination, compare with the situation of using combination in addition, uncertain interaction can be brought into play, blackspot can be suppressed to produce effectively.

With Fig. 3 the relation that produces the character of surface of blackspot and photographic layer on the formation image is described below.Wherein, adopt the cavity conveying agent with respect to the dissolving amount of separating out of olein from photographic layer as the character of surface index of photographic layer.This is because the cavity conveying agent is big more from the dissolving amount of separating out of photographic layer with respect to olein, and the agent of expression cavity conveying is inhomogeneous more in the photographic layer surface distributed, and then the character of surface of expression photographic layer is inhomogeneous more.In addition, because in fact the cavity conveying agent is separated out from the photographic layer surface dissolution, therefore the character of surface of photographic layer is further reduced.

Fig. 3 is that expression produces blackspot number and the cavity conveying agent curve map from the relation of the dissolving amount of separating out of photographic layer.Transverse axis is illustrated in and forms the blackspot number (individual/A4 paper) that produces on the image, and the longitudinal axis represents that the cavity conveying agent is with respect to dissolving the separate out amount (mg) of olein from photographic layer.Curve among Fig. 3 is the Electrophtography photosensor of expression when use measuring described family curve A shown in Figure 2, that is the family curve during as the cavity conveying agent, the compound (HTM-3) of promptly using formula (8) expression with an example of the compound of general formula (1) expression.

From described family curve as can be known, increase with producing the blackspot number, the cavity conveying agent increases with respect to the dissolving amount of separating out of olein from photographic layer.

It is closely related that this is illustrated in the character of surface that produces blackspot and photographic layer on the formation image.

Therefore, can be understood as: with the compound of general formula (1) expression and have interaction special between the electron transporting agent of regulation solubleness, effect with the character of surface that improves photographic layer effectively, its result, can suppress the lip-deep membranization of photographic layer, and then can be suppressed to form on the image and produce blackspot.

(2)-2 kind

As described electron transporting agent, just there is no particular limitation as long as have described solubleness, can use in the past the compound as electron transporting agent.Specifically, can exemplify with the compound of following general formula (3)～(5) expressions etc.

If have the electron transporting agent of these structures, then not only can be easily electron transporting agent be adjusted to the scope of regulation with respect to the solubleness of regulation solvent, can also more effectively bring into play electron transporting agent and have ad hoc structure with the special interaction between the compound of general formula (1) expression.

In the general formula (3), R ³Expression halogen atom, carbon number are that 1～6 replacement or non-substituted alkyl or carbon number are 6～30 replacement or non-substituted aryl, R ⁴The expression carbon number is that 1～6 replacement or non-substituted alkyl, carbon number are 6～30 replacement or non-substituted aryl or with-O-R ⁵The base of expression, R ⁵The expression carbon number is that 1～6 replacement or non-substituted alkyl, carbon number are that 6～30 replacement or non-substituted aryl or carbon number are 7～30 replacement or non-substituted aralkyl.

In the general formula (4), R ⁶And R ⁷Independent respectively expression carbon number is 1～6 replacement or non-substituted alkyl.

In the general formula (5), R ⁸～R ¹²Independent respectively expression hydrogen atom, halogen atom or carbon number are 1～8 replacement or non-substituted alkyl.

(2)-3 object lesson

Object lesson with the compound of described general formula (3)～(5) expressions can exemplify the compound (ETM-1～3) of using following formula (12)～(14) expression respectively.

ETM-1～3 solubleness with respect to tetrahydrofuran under 25 ℃ mensuration temperature is respectively 33 quality %, 27 quality %, 28 quality %.

(2)-4 content

Preferably, with respect to the content of the binding resin electron transporting agent of 100 mass parts in the scope of 10～70 mass parts.

Content by making electron transporting agent is in above-mentioned scope, not only can further bring into play effectively and have ad hoc structure with general formula (1) expression compound between special interaction, can also improve the electron transport efficient in the photographic layer, also can improve the sensory characteristic of Electrophtography photosensor.

That is, if the content of electron transporting agent is very few, then not only be difficult to give full play to and have ad hoc structure with the special interaction between the compound of general formula (1) expression, and electron transport efficient also excessively reduces sometimes.On the other hand, if the content of electron transporting agent is too much, then electron transporting agent itself becomes the main cause of the dispersiveness that reduces the compound of using general formula (1) expression with ad hoc structure.

Therefore, more preferably, with respect to the content of the binding resin electron transporting agent of 100 mass parts in the scope of 20～60 mass parts, further preferably in the scope of 20～50 mass parts.

Describe to the content of electron transporting agent and in the relation that forms the blackspot number that produces on the image with Fig. 4 below.

Fig. 4 is the content of expression electron transporting agent and the curve map of the relation that produces the blackspot number.Transverse axis is represented the content (mass parts) with respect to the binding resin electron transporting agent of 100 mass parts, and the longitudinal axis is illustrated in and forms the blackspot number (individual/A4 paper) that produces on the image.

Among Fig. 4, family curve A is to use the compound (HTM-3) of promptly using formula (8) expression by an example of the compound of general formula (1) expression as the cavity conveying agent, and the family curve when using compound (ETM-2) that the example of compound with regulation solubleness promptly uses formula (13) expression as electron transporting agent.Family curve B is to use the compound (HTM-3) of promptly using formula (8) expression by example of compound of general formula (1) expression as the cavity conveying agent, and the family curve when using compound (ETM-4) that the electron transporting agent that does not have regulation solubleness promptly uses following formula (15) expression as electron transporting agent.

In addition, the content of each cavity conveying agent is respectively 50 mass parts with respect to the binding resin of 100 mass parts.

About other detailed about Electrophtography photosensor formation and produce the condition determination etc. of blackspot number, in the embodiment of back, narrate.

ETM-4 solubleness with respect to tetrahydrofuran under 25 ℃ mensuration temperature is 20 quality %, beyond the scope of regulation solubleness of the present invention.

From family curve A as can be known, have in use under the situation of compound as electron transporting agent of regulation solubleness,, also can stably be suppressed at about 50/A4 paper to the blackspot number that produces or below the 50/A4 paper even the content of electron transporting agent changes significantly.In addition, in the family curve of Fig. 4, though the content of electron transporting agent only changes in the scope of 20～40 mass parts, but confirm:, also can stably be suppressed at about 50/A4 paper to the blackspot number that produces or below the 50/A4 paper in the scope of 10～70 mass parts even the content of electron transporting agent changes by other approach.

On the other hand, from family curve B as can be known, do not have under the situation of compound as electron transporting agent of regulation solubleness, even the content of electron transporting agent does not have big influence to the blackspot number that produces yet in use.More particularly, with the content increase of electron transporting agent, the blackspot number of generation only increases very lentamente, can not confirm fully effectively to reduce the effect that produces the blackspot number.

Therefore, by family curve A and B as can be seen, with the compound of general formula (1) expression and have between the electron transporting agent of regulation solubleness, brought into play uncertain interaction, and the content by making the electron transporting agent with regulation solubleness can more effectively be brought into play this interaction in the scope of 10～70 mass parts.

(3) charge generation agent

(3)-a kind

Can use known in the past charge generation agent as the charge generation agent of in Electrophtography photosensor of the present invention, using.Specifically, can exemplify phthualocyanine pigment, perylene pigment, disazo pigment and do not have metal naphthalene phthalocyanine pigment etc.In addition, each charge generation agent can only be used a kind of, also can use two or more combinations back.

(3)-2 object lesson

More particularly, can exemplify the phthualocyanine pigment of representing with following formula (16) (CGM) as described charge generation agent.

(3)-3 content

Preferably, with respect to the binding resin of 100 mass parts, the content of charge generation agent is in the scope of 0.2～40 mass parts.If the content of charge generation agent is very few, the effect that then improves quantum yield (quantum efficiency) is not enough, can not improve sensory characteristic, electrical specification, stability of Electrophtography photosensor etc.On the other hand, if the content of charge generation agent is too much, then increase wavelength inadequately, can not improve sensory characteristic, electrical specification and the stability etc. of photoreceptor sometimes in the effect of the absorption coefficient of light of the light of red area, near infrared region or the region of ultra-red of visible light.So the content of more preferably charge generation agent is in the scope of 0.5～20 mass parts.

(4) adjuvant

In photographic layer except described various compositions, the electrofax characteristic is not being had in the scope of bad influence, can add known in the past various adjuvants, for example can add antioxidant, ultraviolet light absorber etc. and prevent degradation, softening agent, plasticizer, surface modifier and dispersion stabilizer etc.

(5) binding resin

Specifically can exemplify as described binding resin: thermoplastic resins such as polycarbonate resin, polyarylate resin; Thermoset resins such as silicones, epoxy resin, phenolics, urea resin, melamine resin; Or the like.These binding resins can use separately, also can use two or more combinations back.

In addition, preferred binding resin contains the hydrophobicity polycarbonate resin.Its reason is: if the hydrophobicity polycarbonate resin, the character of surface of then regulating photographic layer easily can more effectively be suppressed on the photographic layer surface and produce membranization.

In addition, preferably have gradient ground and contain this hydrophobicity polycarbonate resin, make in containing of photographic layer near surface increase hydrophobicity polycarbonate resin proportional.Like this, even more a spot of hydrophobicity polycarbonate resin also can suppress to produce membranization effectively.

In addition, preferred described hydrophobicity polycarbonate resin comprises the polycarbonate resin with siloxane structure.Its reason is: if having the polycarbonate resin of siloxane structure, then can more easily regulate the character of surface of photographic layer.That is, the siloxane structure part can be brought into play good hydrophobicity.

(6) thickness

The thickness of photographic layer is preferably in the scope of 5～100 μ m.Its reason is: if the thickness of photographic layer is thin excessively, then be difficult to be formed uniformly photographic layer, physical strength reduces sometimes; On the other hand, if the thickness of photographic layer is blocked up, then photographic layer is peeled off from matrix easily sometimes.Therefore more preferably photographic layer thickness in the scope of 10～50 μ m, further preferably in the scope of 15～45 μ m.

(7) manufacture method

The manufacture method of Electrophtography photosensor has no particular limits, and can implement by following order.

At first, charge generation agent, charge transport agent, binding resin, adjuvant etc. are contained in the solvent, make coating fluid.Secondly, the coating fluid that obtains so for example with rubbing methods such as dip coated method, spraying rubbing method, drop coating (bead coating) method, scraper rubbing method, roller rubbing methods, is coated on the conductive base material (aluminum pipe base).Then, heated-air drying 40 minutes under 100 ℃ condition for example just can obtain having the mono-layer electronic photographic photoreceptor of the photographic layer of regulation thickness.

There is no particular limitation to be used to make the solvent of coating fluid, can use various organic solvents.What specifically, can exemplify has: alcohols such as methyl alcohol, ethanol, isopropyl alcohol, butanols; Aliphatic hydrocarbons such as normal hexane, octane, cyclohexane; Aromatic hydrocarbons such as benzene,toluene,xylene; Halogenated hydrocarbons such as methylene chloride, ethylene dichloride, chloroform, phenixin, chlorobenzene; Dimethyl ether, ether, tetrahydrofuran, glycol dimethyl ether, diethylene glycol dimethyl ether, 1, ethers such as 3-two oxa-s, penta ring, 1,4-diox; Ketones such as acetone, MEK, cyclohexanone; Ester such as ethyl acetate, methyl acetate class; Dimethylformaldehyde; Dimethyl formamide; Dimethyl sulfoxide (DMSO); Or the like.These solvents can use separately, also can use two or more combinations back.Can also contain interfacial agent, levelling agent etc. for the dispersiveness of improving the charge generation agent, the flatness on photographic layer surface this moment.

Preferably, before forming described photographic layer, on matrix, form the middle layer in advance.When forming this middle layer, the adjuvant (organic attritive powder or inorganic attritive powder) that adds is with suitable dispersion medium binding resin, as required, utilize known method, for example use dispersions such as roller mill (roll mill), bowl mill, attitor (attritor), printing ink vibrating machine, ultrasonic dispersing machine to mix and prepare coating fluid, and pass through known method, for example scrape the skill in using a kitchen knife in cookery, infusion process, spray-on process etc. this coating fluid is coated with, implement to form the middle layer after the thermal treatment.

In addition, in the scope that described adjuvant precipitation during fabrication etc. can not throw into question, after preventing light scattering, produce interference fringe etc., can add various adjuvants (organic attritive powder or inorganic attritive powder) on a small quantity.

Then, can for example upward be coated with the coating fluid that obtains according to known manufacture method with rubbing methods such as dip coated method, spraying rubbing method, drop rubbing method, scraper rubbing method, roller rubbing methods in support substrate (aluminum pipe base).After this, the operation of the coating fluid drying on the matrix is preferably being carried out under 20～200 ℃ the temperature in 5 minutes～2 hours scope.

＜the second embodiment 〉

The image processing system of second embodiment of the invention comprises: image carrier; Be used to make the Charging system of described image carrier surface charging; The exposure device that is used to make described image carrier face exposure and forms electrostatic latent image; Be used to make the developing apparatus of described electrostatic latent image as the development of toner picture; And be used for described toner picture is transferred to the transfer device that is transferred on the part from described image carrier, wherein, described image carrier is aforesaid mono-layer electronic photographic photoreceptor.In addition, described Charging system, developing apparatus and the transfer device of this image processing system be configured in Electrophtography photosensor around.

With Fig. 5 the image processing system of second embodiment is described below, the emphasis of explanation is and the different place of described first embodiment.

Fig. 5 is the integrally-built sectional drawing of the image processing system of schematic representation second embodiment of the invention.The image processing system of second embodiment of the invention for example can be a duplicating machine 30 shown in Figure 5.This duplicating machine 30 comprises image formation unit 31, paper delivery unit 32, image fetching unit 33 and original copy feed unit 34.Image formation unit 31 has image forming part 31a and sheet feed section 31b.And, in illustrated embodiment, original copy feed unit 34 has original copy holding tray 34a, original copy feed mechanism 34b and original copy discharge dish 34c, is placed on after original copy on the original copy holding tray 34a is transported to image reading position P by original copy feed mechanism 34b, discharges to original copy discharge dish 34c.

And original copy is being transported to the stage that original copy reads position P, in image fetching unit 33, is being used to light, reading the image on the original copy from light source 33a.That is,, form and the corresponding picture signal of image on the original copy with optical element 33b such as CCD.

On the other hand, recording chart (the being designated hereinafter simply as paper) S that is layered among the sheet feed section 31b is delivered to image forming part 31a one by one.In this image forming part 31a, have photosensitive drums 41 as image carrier, around this photosensitive drums 41 along the rotation direction of photosensitive drums 41 dispose charged device 42 as Charging system, as the exposer 43 of exposure device, as the developer 44 of developing apparatus with as the transfer roll 45 of transfer device.

In these constituent parts, photosensitive drums 41 is driven to the direction of representing with solid arrow among the figure and rotates, and makes its surperficial uniform charged by charged device 42.After this according to described picture signal, implement exposure process, on these photosensitive drums 41 surfaces, form electrostatic latent image by 43 pairs of photosensitive drums of exposer 41.

According to this electrostatic latent image, develop with developer 44 adhering toner, on photosensitive drums 41 surfaces, form the toner picture.This toner looks like to be transferred on the paper S of the crack portion that is transported to photosensitive drums 41 and transfer roll 45, becomes the transfer printing picture.Then, transfer printing the paper S of transfer printing picture be transported to fixation unit 47, carry out fixing.

Described image processing system is characterised in that photosensitive drums 41 is used the Electrophtography photosensor that illustrates in described first embodiment.

Paper S after the photographic fixing is transported to paper delivery unit 32, in the time will carrying out aftertreatment (for example binding processing etc.), carries out aftertreatment after paper S is transported to telophragma 32a.After this paper S is discharged in the paper discharge tray portion (not expression among the figure) that is arranged on the image processing system side.On the other hand, do not carrying out under the situation of aftertreatment, paper S is discharged on the paper discharge tray 32b that is arranged on telophragma 32a downside.Telophragma 32a and paper discharge tray 32b constitute paper delivery portion in the so-called fuselage.

Image processing system of the present invention is because the Electrophtography photosensor with regulation, so under the environment for use of common temperature humidity, still under hot and humid service condition, can suppress to produce blackspot effectively, stably form distinct image, and can keep good sensory characteristic effectively.

Be to use developer roll at this said developing apparatus, make toner attached to the developing apparatus on the electrostatic latent image that forms on the Electrophtography photosensor.

In addition, preferably, described developing apparatus adopts the mode that also cleans when developing, promptly, develop toner being offered the electrostatic latent image that on described mono-layer electronic photographic photoreceptor, forms, and reclaim and remain in the lip-deep toner of described mono-layer electronic photographic photoreceptor.

By adopting the described mode of developing and cleaning, can help to make image processing system miniaturization and simplification, on the other hand, can be suppressed at effectively membranization on the photographic layer surface and cause thus produce blackspot forming on the image.

That is,, then,, also can suppress the generation blackspot that membranization takes place and cause thus fully even adopt the described mode of developing and cleaning because its character of surface is good if adopt the Electrophtography photosensor that uses in the present embodiment.

In addition, preferably, have at least one to contact in described Charging system, developing apparatus and the transfer device with described mono-layer electronic photographic photoreceptor.

Make under these situations of installing the mode that contacts with Electrophtography photosensor in employing, general on the photographic layer surface membranization takes place easily, if but according to the present invention, then because specific mono-layer electronic photographic photoreceptor is housed, thus can suppress effectively membranization and cause thus on the formation image, produce blackspot.

More particularly, transfer device preferably uses transfer belt, and Charging system preferably uses charged roller.

That is, under the situation of using transfer belt and charged roller, generally ooze out (bleeding), on the photographic layer surface, membranization takes place easilier because of the diffusion that on transfer belt and charged roller, produces.If but according to the present invention, then because specific mono-layer electronic photographic photoreceptor is housed, thus can suppress effectively membranization and cause thus on the formation image, produce blackspot.

" embodiment "

The present invention is described in detail according to embodiment below.

＜embodiment 1 〉

1. the manufacturing of mono-layer electronic photographic photoreceptor

Use 4 mass parts the X type metal-free phthalocyanine (CGM) of formula (16) expression as the charge generation agent, use 50 mass parts the compound (HTM-1) of formula (6) expression as the cavity conveying agent, use 30 mass parts the compound (ETM-1) of formula (12) expression as electron transporting agent, is the viscosity-average molecular weight of 100 mass parts 30,000 polycarbonate resin is as binding resin, the tetrahydrofuran of 800 mass parts as solvent, all is contained in them in the container.

Then mix and disperseed 50 hours, be prepared into the coating fluid that photographic layer is used with bowl mill.Be coated on the coating fluid that obtains on the matrix (aluminum pipe base) of diameter 16mm, length 254mm with the dip coated method then, heated-air drying is 40 minutes under 100 ℃ of conditions, obtains having the mono-layer electronic photographic photoreceptor that film thickness is the single-layer type photographic layer of 25 μ m.

2. the evaluation of mono-layer electronic photographic photoreceptor

(1) mensuration of the dissolving amount of separating out of cavity conveying agent

Measured dissolving the separate out amount of cavity conveying agent from photographic layer.

Promptly, the coating fluid that the photographic layer that obtains when being coated on the manufacturing mono-layer electronic photographic photoreceptor on the matrix of external diameter 30mm is used, behind the photographic layer that forms film thickness 30 μ m, this photographic layer with matrix, dipping is 20 hours in the olein at 30g under 25 ℃ the condition, steeping length is 40mm, measures the amount (mg) of the cavity conveying agent of separating out from the photographic layer surface dissolution this moment.

Measure the amount of the cavity conveying agent that this dissolving separates out, at first be the dissolving cavity conveying agent identical in olein in advance with determination object, make it reach the concentration of regulation, be determined at the ultraviolet absorbance (wavelength: any two wavelength in 350～450nm scope), obtain the ratio of the concentration of absorbance and cavity conveying agent in this solution.

Measure the ultraviolet absorbance in the olein that makes after photographic layer floods then, calculate the amount of dissolving the cavity conveying agent of separating out from photographic layer from described proportional meter.What obtain the results are shown in table 1.

Different with the cavity conveying agent from the dissolving amount of separating out of photographic layer, make the resin bed that only contains the cavity conveying agent with respect to binding resin in addition, measured dissolving the separate out amount of cavity conveying agent from this resin bed.

Promptly, on the matrix of external diameter 30mm, polycarbonate resin with respect to 100 mass parts, the content of cavity conveying agent is 80 mass parts, behind the resin bed that forms film thickness 30 μ m, this resin bed and matrix together, dipping is 20 hours in the olein at 30g under 25 ℃ the condition, steeping length is 40mm, measures the amount (mg) of dissolving the cavity conveying agent of separating out this moment from resin layer surface.

Assay method is identical from the amount that photographic layer dissolves the cavity conveying agent of separating out with described mensuration.

(2) mensuration of generation blackspot number

The mono-layer electronic photographic photoreceptor that obtains is installed on the printer (DP of Kyoji, Meida K.K's system-560), under the environmental baseline of 40 ℃ of temperature, relative humidity 90%Rh, go up with 5,000 original images of the continuous printing of 6% printing rate at A4 paper (the high quality P PC paper of Fuji-Xerox's system).After this after printer being placed 6 hours, printing blank sheet of paper original copy on A4 paper, statistics produces the quantity of blackspot on this A4 paper, and estimates by following benchmark.What obtain the results are shown in table 1.

A: the blackspot number that produces on every A4 paper is less than 50.

B: the blackspot number that produces on every A4 paper is more than or equal to 50 and less than 100.

C: the blackspot number that produces on every A4 paper is more than 100.

(3) mensuration of sensitivity

Measured the sensitivity of the mono-layer electronic photographic photoreceptor that obtains under the following conditions.

Promptly, use drum sensitivity testing machine (GENTEC Co., Ltd. system), under the state of the surface potential that makes mono-layer electronic photographic photoreceptor for+700V, from the white light of Halogen lamp LED, take out monochromatic light (the half breadth 20nm of wavelength 780nm with bandpass filter, light intensity 0.6 μ J/cm2), described monochromatic light to mono-layer electronic photographic photoreceptor surface irradiation 50msec.In the moment that begins from exposure through 0.35 second, measure surface potential then as sensitivity (V).The table 1 that the results are shown in of sensitivity that obtains and sensitivity.

＜embodiment 2～17 and comparative example 1～22 〉

Embodiment 2～17 and comparative example 1～22 are tested in the same manner with embodiment 1 except the cavity conveying agent shown in the table 1 and electron transporting agent being changed to content as shown in table 1.Evaluation result is shown in table 1 respectively.In addition, HTM-7～10 and ETM the-the 5th, with the compound of following formula (17)～formula (21) expression.

Table 1

As can be seen from Table 1, has the compound of using general formula (1) expression of ad hoc structure as the cavity conveying agent in use, use is (embodiment 1～17) under the situation of compound as electron transporting agent of 27～50 quality % with respect to the solubleness of tetrahydrofuran (THF), compare as the situation (comparative example 1～18) of cavity conveying agent with the compound beyond using the compound of representing by general formula (1), cavity conveying agent (HTM) is few from the dissolving amount of separating out of photographic layer, and the blackspot number that produces on the formation image is few.Even the compound of general formula (1) expression as the cavity conveying agent, use solubleness with respect to tetrahydrofuran less than the situation of compound of 27 quality % as electron transporting agent under (comparative example 19～22), compare with embodiment 1～17, cavity conveying agent (HTM) is also many from the dissolving amount of separating out of photographic layer, and the blackspot number that produces on the formation image is also many.

As detailed above, the invention provides a kind of mono-layer electronic photographic photoreceptor, comprise matrix and the individual layer photographic layer that is arranged on the described matrix, wherein, described photographic layer comprises charge generation agent, cavity conveying agent, electron transporting agent and binding resin, described cavity conveying agent is that described electron transporting agent solubleness to tetrahydrofuran under 25 ℃ condition is 27～50 quality % with the compound of following general formula (1) expression.

In the general formula (1): Ar ¹The aryl of expression monocycle or 2～4 rings, this aryl are non-substituted aryls or to have carbon number as substituting group be that 1～4 alkyl, carbon number are that 1～4 alkoxy, carbon number are the aryl of 5～6 naphthenic base, benzyl, phenyl or halogen atom; Ar ²Expression phenylene, naphthylene, biphenylene or anthrylene, described each base are non-substituting groups or to have carbon number as substituting group be that 1～4 alkyl, carbon number are 1～4 the alkoxy or the base of halogen atom; X ¹Expression hydrogen atom, carbon number are 1～4 the alkyl or the aryl of monocycle or 2～4 rings, and this aryl is a non-substituted aryl or to have carbon number as substituting group be that 1～4 alkyl, carbon number are that 1～4 alkoxy, carbon number are the aryl of 5～6 naphthenic base, benzyl, phenyl or halogen atom; Y ¹The aryl of expression monocycle or 2～4 rings, this aryl are non-substituted aryls or to have carbon number as substituting group be that 1～4 alkyl, carbon number are that 1～4 alkoxy, carbon number are 5～6 naphthenic base, benzyl, phenyl, halogen atom or the substituent aryl of representing with following general formula (2).

In the general formula (2): R ¹Expression hydrogen atom, carbon number are that 1～4 alkyl or carbon number are 1～4 alkoxy; R ²Expression hydrogen atom, halogen atom or carbon number are 1～4 alkyl; Z ¹The aryl of expression hydrogen atom or monocycle or 2～4 rings, this aryl are non-substituted aryls or to have carbon number as substituting group be that 1～4 alkyl, carbon number are that 1～4 alkoxy, carbon number are the aryl of 5～6 naphthenic base, benzyl, phenyl or halogen atom; Replace radix m and n and represent 0～4 integer.

According to described formation, has the compound of using general formula (1) expression of ad hoc structure as the cavity conveying agent by use, and use the compound of solubleness in specialized range to the regulation solvent as electron transporting agent, can improve the dispersiveness of the cavity conveying agent that in photographic layer, has ad hoc structure effectively.

More particularly, electron transporting agent utilization and special interaction with regulation solubleness with cavity conveying agent of ad hoc structure, function can be brought into play, the dispersiveness of the cavity conveying agent that in photographic layer, has ad hoc structure can be improved effectively as the dispersing aid of this cavity conveying agent.

Its result, owing to can improve the character of surface of photographic layer effectively, so under the environment for use of common temperature humidity, still under hot and humid environment for use, can be suppressed at effectively take place on the photographic layer surface membranization and cause thus on the formation image, produce blackspot.

In addition, by improving the dispersiveness of the charge transport agent in the photographic layer, can bring into play effectively the good conveying hole ability that cavity conveying agent with ad hoc structure had originally and the characteristic of ozone resistance, can keep good sensory characteristic effectively.

In addition, electron transporting agent is to be illustrated under 25 ℃ the condition to the solubleness of tetrahydrofuran, the amount (g) of the electron transporting agent to greatest extent that can dissolve with respect to the 100g tetrahydrofuran.

In described mono-layer electronic photographic photoreceptor, preferably: at external diameter is that 30mm, length are that to form thickness on the described matrix of 40mm be the resin bed of 30 μ m, consisting of of described resin bed: with respect to 100 mass parts polycarbonate resins, allocate the compound of 80 mass parts into described general formula (1) expression, under the condition of 25 ℃ of fluid temperatures, the matrix that forms described resin bed flood 20 hours in the 30g olein, the compound of representing with described general formula (1) this moment with respect to the dissolving amount of separating out of olein in the scope of 1～10mg.

According to such formation, can further improve the dispersiveness that the cavity conveying agent itself that has ad hoc structure in photographic layer is had.

In described mono-layer electronic photographic photoreceptor, preferably: described electron transporting agent is selected a kind of from the group that compound constituted with following general formula (3)～(5) expression at least.

According to this formation, not only can easily be adjusted to the scope of regulation to electron transporting agent with respect to the solubleness of regulation solvent, and can more effectively bring into play electron transporting agent and have special interaction between the cavity conveying agent of ad hoc structure.

In described mono-layer electronic photographic photoreceptor, preferably: with respect to the binding resin of described 100 mass parts, the content of described electron transporting agent is in the scope of 10～70 mass parts.

According to such formation, not only can more effectively bring into play electron transporting agent and have special interaction between the cavity conveying agent of ad hoc structure, and can improve electron transport efficient in photographic layer, can also further improve the sensory characteristic of Electrophtography photosensor.

In described mono-layer electronic photographic photoreceptor, preferably: the external diameter of described matrix is in the scope of 10～25mm.

According to such formation, can help the miniaturization of image processing system, on the other hand, can be suppressed at effectively the lip-deep membranization of photographic layer and cause thus produce blackspot forming on the image.

The present invention also provides a kind of image processing system, and described image processing system comprises: image carrier; Charging system is used to make described image carrier surface charging; Exposure device is used to make described image carrier face exposure, forms electrostatic latent image; Developing apparatus is used to make described electrostatic latent image to develop as the toner picture; Transfer device is used for described toner picture is transferred to from described image carrier and is transferred part, and wherein, described image carrier is above-described mono-layer electronic photographic photoreceptor.

According to this configuration, because image processing system is equipped with the good specific mono-layer electronic photographic photoreceptor of character of surface of photographic layer, even so under the environment for use of common temperature humidity, still under hot and humid environment for use, can be suppressed at effectively produce on the photographic layer surface membranization and cause thus on the formation image, produce blackspot.

In addition, because charge transport agent in photographic layer is dispersed good, so can keep good sensory characteristic effectively.

In addition, in described image processing system, preferably: described developing apparatus develops toner being offered the electrostatic latent image that forms on described mono-layer electronic photographic photoreceptor, and reclaims and remain in the lip-deep toner of described mono-layer electronic photographic photoreceptor.

According to this configuration, can help the miniaturization and the simplification of image processing system, on the other hand, can be suppressed at effectively the lip-deep membranization of photographic layer and cause thus produce blackspot forming on the image.

In addition, in described image processing system, preferably: have at least one to contact in described Charging system, described developing apparatus and the described transfer device with described mono-layer electronic photographic photoreceptor.

According to this configuration, generally on the photographic layer surface, be easy to generate membranization, but according to the present invention because specific mono-layer electronic photographic photoreceptor is installed, so can suppress effectively membranization and cause thus on the formation image, produce blackspot.

Mono-layer electronic photographic photoreceptor of the present invention and image processing system, the compound of structure that has general formula (1) by use is as the cavity conveying agent, and use as electron transporting agent, can improve the character of surface of photographic layer for the compound of solubleness in specialized range of stipulating solvent effectively.

Its result, even under the environment for use of common temperature humidity, still carrying out image under hot and humid environment for use forms, can be suppressed at effectively on the photographic layer surface produce membranization and cause thus on the formation image, produce blackspot, the good delivered charge ability of cavity conveying agent can be brought into play in addition effectively, sensory characteristic can be stably kept with ad hoc structure.

Therefore, mono-layer electronic photographic photoreceptor of the present invention and image processing system can help to make that various image processing systems such as duplicating machine or printer improve the quality, life-saving.

Claims

1. mono-layer electronic photographic photoreceptor is characterized in that comprising:

Matrix; With the individual layer photographic layer that on described matrix, is provided with; Wherein,

Described photographic layer comprises charge generation agent, cavity conveying agent, electron transporting agent and binding resin,

Described cavity conveying agent is the compound with following general formula (1) expression,

Described electron transporting agent solubleness to tetrahydrofuran under 25 ℃ condition is 27～50 quality %,

In the general formula (1): Ar ¹The aryl of expression monocycle or 2～4 rings, this aryl are non-substituted aryls or to have carbon number as substituting group be that 1～4 alkyl, carbon number are that 1～4 alkoxy, carbon number are the aryl of 5～6 naphthenic base, benzyl, phenyl or halogen atom; Ar ²Expression phenylene, naphthylene, biphenylene or anthrylene, described each base are non-substituting groups or to have carbon number as substituting group be that 1～4 alkyl, carbon number are 1～4 the alkoxy or the base of halogen atom; X ¹Expression hydrogen atom, carbon number are 1～4 the alkyl or the aryl of monocycle or 2～4 rings, and this aryl is a non-substituted aryl or to have carbon number as substituting group be that 1～4 alkyl, carbon number are that 1～4 alkoxy, carbon number are the aryl of 5～6 naphthenic base, benzyl, phenyl or halogen atom; Y ¹The aryl of expression monocycle or 2～4 rings, this aryl is a non-substituted aryl or to have carbon number as substituting group be that 1～4 alkyl, carbon number are that 1～4 alkoxy, carbon number are 5～6 naphthenic base, benzyl, phenyl, halogen atom or with the substituent aryl of following general formula (2) expression

2. mono-layer electronic photographic photoreceptor according to claim 1, it is characterized in that, at external diameter is 30mm, length is that to form thickness on the described matrix of 40mm be the resin bed of 30 μ m, consisting of of described resin bed: with respect to 100 mass parts polycarbonate resins, allocate the compound of 80 mass parts into described general formula (1) expression, under the condition of 25 ℃ of fluid temperatures, the matrix that forms described resin bed was flooded 20 hours in the 30g olein, at this moment, with the compound of described general formula (1) expression with respect to the dissolving amount of separating out of olein in the scope of 1～10mg.

3. mono-layer electronic photographic photoreceptor according to claim 1 is characterized in that,

Described electron transporting agent is selected a kind of from the group that compound constituted with following general formula (3)～(5) expression at least,

In the general formula (3), R ³Expression halogen atom, carbon number are that 1～6 replacement or non-substituted alkyl or carbon number are 6～30 replacement or non-substituted aryl, R ⁴The expression carbon number is that 1～6 replacement or non-substituted alkyl, carbon number are 6～30 replacement or non-substituted aryl or with-O-R ⁵The base of expression, R ⁵The expression carbon number is that 1～6 replacement or non-substituted alkyl, carbon number are that 6～30 replacement or non-substituted aryl or carbon number are 7～30 replacement or non-substituted aralkyl,

In the general formula (4), R ⁶And R ⁷Independent respectively expression carbon number is 1～6 replacement or non-substituted alkyl,

4. mono-layer electronic photographic photoreceptor according to claim 1 is characterized in that, the content of described electron transporting agent is with respect to the binding resin of described 100 mass parts, in the scope of 10～70 mass parts.

5. mono-layer electronic photographic photoreceptor according to claim 1 is characterized in that the external diameter of described matrix is in the scope of 10～25mm.

6. image processing system is characterized in that comprising:

Image carrier;

Charging system is used to make described image carrier surface charging;

Exposure device is used to make described image carrier face exposure, forms electrostatic latent image;

Developing apparatus is used to make described electrostatic latent image to develop as the toner picture; And

Transfer device is used for described toner picture is transferred to from described image carrier and is transferred part;

Wherein,

Described image carrier is any described mono-layer electronic photographic photoreceptor among the claim 1-5.

7. image processing system according to claim 6, it is characterized in that, described developing apparatus develops toner being offered the electrostatic latent image that forms on described mono-layer electronic photographic photoreceptor, and reclaims the toner that remains in described mono-layer electronic photographic photoreceptor surface.

8. image processing system according to claim 6 is characterized in that, has at least one to contact with described mono-layer electronic photographic photoreceptor in described Charging system, described developing apparatus and the described transfer device.