JPS62266547A - Photosensitive body - Google Patents

Abstract

PURPOSE:To enable the relatively easy adhesion especially of a filter layer to the photosensitive layer of a photosensitive body and to improve the insulation by forming a color separation layer as the filter layer on the photosensitive body with an anaerobic polyester adhesive in-between. CONSTITUTION:A layer having a color separation function (a color separation layer or a member for color separation) is adhered to upper side and/or lower side of a photosensitive layer with an anaerobic polyester adhesive. This adhesive is a one- component type monomer adhesive. It does not cure in the presence of the air or oxygen, begins to polymerize by isolation from the air and cures at room temp. The adhesive is made of a polyester type dimethacrylate. When a photosensitive body is produced, a filter layer provided on a transparent thin film formed on a support with an adhesive layer in-between is stripped together with the thin film from the support, then the thin film having the filter layer is adhered to one side of a photosensitive layer with the adhesive. For example, a photosensitive body 40 has a photosensitive layer 12 formed on an electrically conductive member 11 and a layer 3 composed of a composite filter layer 3a consisting of a group of necessary minute color separation filters and a thin film 3b and adhered to the surface of the layer 12 with the above-mentioned adhesive 2.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to photoreceptors, particularly electrophotographic photoreceptors.

BACKGROUND OF THE INVENTION In the past, several methods and apparatus have been proposed for forming multicolor images using electrophotography.

For example, there is a multicolor image forming method and apparatus in which each time a toner image of each color is formed on an electrophotographic photoreceptor by image exposure and development according to each color separated light, the image is transferred to recording paper. For example, using a device equipped with a plurality of photoreceptors corresponding to the number of separated colors, each photoreceptor is subjected to image exposure and development of each color to form a toner image of each color, and this is sequentially applied to recording paper. There are methods and devices for transferring.

However, in the former method and apparatus, the photoreceptor is rotated multiple times to form a 1-toner image for each color, so it takes a long time to record the image, and it is difficult to increase the speed. be. The latter method and apparatus use a plurality of photoreceptors in parallel, which is advantageous in terms of high speed, but has drawbacks such as the apparatus becoming larger and more expensive. Furthermore, since transfer is repeated multiple times for both the former and the latter, there is a problem in that it is difficult to align the images.

As a solution to these shortcomings, a patent application filed in 1986-18
No. 5440, No. 59-187044, No. 59-199
No. 547, Go-229524, etc., a composite filter in which multiple types of microfilters of different colors are arranged in a mosaic pattern is placed above the photosensitive layer (the side to which toner adheres during development) or below the photosensitive layer. An image forming method using a photoreceptor (on the side to which toner does not adhere during development) has been proposed. According to this method, after image exposure is applied through a composite filter bonded to a photoreceptor, the entire surface is exposed to specific light, and the portion of the composite filter corresponding to the specific filter is exposed to the light transmitted through the filter. The process of forming a corresponding electrostatic image, developing it using toner of a specific color, and smoothing it by recharging is repeated for each type of filter to form a multicolor image on the photoreceptor. It has the advantage of requiring only one exposure and no need for alignment, making it possible to easily obtain high-quality multicolor images.

C1 Problems to be Solved by the Invention Although the method of using a photoreceptor having a mosaic filter has many advantages as described above, a major problem is how to provide the filter on the photoreceptor. In other words, simply printing a filter layer on the surface of the photoreceptor, which is relatively fragile but must be extremely smooth and completely free of defects such as scratches, will not produce good results, and it is difficult to achieve technical results. It was also accompanied by many difficulties.

On the other hand, a method of forming an image using a photoreceptor having an insulating layer attached to the surface of the photoreceptor is a well-known image forming method.

In the photoconductor used in this image forming method, Dainichi Ink & Chemical Co., Ltd.
1. Main agent E of adhesive for polyester film lamination
An adhesive prepared by mixing PS-623 and a hardening agent KN-40 in a ratio of 5:1 and further diluting the adhesive twice with methyl ethyl coke is used (Japanese Patent Application Laid-open No. 16645/1983).

One idea is to use such an adhesive to adhere the above-mentioned mosaic filter onto the photosensitive layer, but the results are unsatisfactory. That is, the adhesive used is required to have the following various performances, but an adhesive that satisfies these has not yet been proposed (the mosaic filter is made of an insulating film such as polyethylene terephthalate).

(1) The adhesion layer (adhesive layer) between the photoreceptor and the color separation member (mosaic filter) must be uniform.

(2) The aggregation rate at the time of curing is small (if it is large, air bubbles will be generated and the image in this area will be sloppy).

(3) Use an adhesive that does not release water during curing. Further, in the case of a water-soluble adhesive, the potential of the surface layer of the photoreceptor flows, which is disadvantageous.

(4) If there are any adhesives (including curing agents) that may melt or contaminate the photoreceptor and color separation member, it is preferable to avoid them.

(5) It is better not to involve heating during adhesion (for example, if the photosensitive layer is made of amorphous selenium, it is likely to crystallize)
.

(6) The adhesive should be highly transparent to white light and infrared light (as this would lead to a decrease in image exposure).

(7) It is best to use a material with high insulation properties (if it is electrically exclusive, the charge will flow and the image will become blurred).

20. OBJECTS OF THE INVENTION It is an object of the present invention to provide a photoreceptor to which a color separation member (layer) is adhered using an adhesive that satisfies the above-mentioned various performances.

E1 Structure of the invention and its effects, that is, the present invention provides a layer having a color separation function (hereinafter referred to as a color separation layer or a color separation member) above and/or below a photosensitive layer that is anaerobic. This relates to a photoreceptor that is bonded via a polyester adhesive.

According to the present invention, a specific adhesive is used for adhering the color separation layer (in particular, the color separation member such as the mosaic filter described above), namely the above-mentioned anaerobic polyester adhesive (hereinafter referred to as the adhesive of the present invention). ), which is a one-component monomer adhesive that does not cure in the presence of air or oxygen; it begins to polymerize when air is removed and cures at room temperature. The ingredients are polyester quib and dimek acrylate.

The composition of this adhesive consists, for example, of tetraethylene glycol methacrylate monomer, an organic peroxide catalyst (e.g. cumene hydroperoxide or L-butyl hydroperoxide) and an accelerator (e.g. dibenzenesulfonamide or triamines); Stabilizers (eg benzoquinone) are added to prevent premature gelation. Properly stabilized adhesives are stable in the presence of oxygen or air for more than one year. Also, -54℃
It can withstand rapid repeated temperature changes from 149°C to 149°C.

Furthermore, it is soluble in most organic solvents, and is non-toxic, non-flammable, and non-volatile.

This anaerobic polyester adhesive cures by radical addition polymerization in the absence of air, but ultimately crosslinks due to the polyfunctionality of the monomers. Moreover, the curing of this anaerobic adhesive is completed in 1 to 12 hours. Since no heating or pressure is required for curing, there is no effect on the photoreceptor, making it suitable for the present invention.

In this way, by providing a color separation layer on the photoreceptor via an adhesive, it is possible to adhere the photosensitive layer and filter layer relatively easily, and since polymer is used, it has high insulation properties. . Furthermore, since the polymer, solvent, and curing agent can be selected relatively freely, one can choose one that will not contaminate the photoreceptor or filter layer. Similarly, the emission spectrum of image exposure (main wavelength 45
0 nm, 550 nm, 650 nm, etc.) can be selected. When a water-insoluble adhesive is used, the amount of charge trapped at the interface between the photosensitive layer and the adhesive layer is considered to be higher than when the adhesive layer is not used.

In addition to the function of bonding the photosensitive layer and filter layer,
It also protects the photosensitive layer.

The thickness of the adhesive of the present invention is preferably about 1 micron when bonding the photosensitive layer and the filter layer.

When the thickness of the adhesive layer increases, image blurring occurs in that area and image contrast decreases.

When manufacturing the photoreceptor of the present invention, it is desirable to employ a manufacturing method that can easily and efficiently manufacture a photoreceptor that has a filter layer that has excellent abrasion resistance and does not impair conductive properties. Such a manufacturing method includes a step of providing a filter layer on a transparent thin film provided on a support via an adhesive layer, a step of peeling off the MP from the support, and a step of removing the thin film having the filter layer from the photosensitive layer. This process includes the step of bonding the upper or lower side with the adhesive of the present invention.

As the support used in this method, a film-like web having appropriate hardness and flexibility, such as various plastic films such as polyethylene terephthalate, polycarbonate, polystyrene, polyethylene, and triacetate, is preferably used. The thickness of these supports varies depending on the properties of the material, but is preferably about 100 μm.

An adhesive layer is provided between the support and the thin film for forming the filter layer to temporarily adhere the two, but the adhesive layer is not particularly limited, and various known adhesives can be used. , an adhesive can be used.

The thin film may be constructed using the same plastic material as the support (there is no particular limitation on its thickness, but it must be strong enough to be handled as an independent film when peeled from the support). It is desirable that the thickness be within the range of 1 to 100 μm, and in practice, the thickness is preferably 5 to 100 μm.
It is preferable to have a specific resistance value of 0'3Ω-0111 or more, but no particular limitation is required when it is provided below the photosensitive layer.

The support and/or thin film can also be treated with a Teflon coat or the like in order to adjust the releasability from the adhesive layer. In other words, if the adhesiveness between the thin film and the adhesive layer is made higher than the adhesiveness between the adhesive layer and the support, the adhesive layer will have a
If the adhesion strength relationship is reversed, the adhesive layer will remain on the support side and a thin film without an adhesive layer will be obtained. In the former case, the adhesive layer may be formed from the adhesive of the invention described above.

FIG. 2 is a diagram schematically showing a cross section of a support having a thin film as described above, in which 1 is the support, 2 is an adhesive layer, and 3b is a thin film.

Then, a filter layer (color separation layer or color separation member) is provided on the thin film surface provided on the support.

The filter layer can be formed by printing directly on the thin film using an ink containing a coloring agent having a desired color and a transparent resin (preferably a hardening resin that hardens with heat or light, etc.), or by printing directly on the thin film, or using a photoresist. Although a method of forming a filter layer with a desired pattern using the above technique is preferred, various other methods such as a method of thermally transferring a colorant can be used.

When forming the filter layer by printing or photoresist techniques, the ink may be post-treated with heat- or photocurable acrylic resins, silicone resins, polyamide resins, melamine resins, isocyanate resins, cinnamic acid resins, etc. as binder resins. It is preferably insoluble in solvents, and is formed by containing 70% by weight or more of a resin and less than 30% by weight, preferably 2% by weight or more of an organic dye or pigment soluble in an organic solvent as a coloring agent. It is preferable to do so. As such a coloring agent, for example, organic dyes or pigments such as copper phthalocyanine, methylene blue, cyanine blue, Victoria blue, etc. are used for blue filters. Further, for green filters, organic dyes or pigments such as brilliant green, malachite green, naphthol green, etc. are used, and for red filters, organic dyes or pigments such as tsuksin, phenosafranin, rhodamine B, naphthol red, etc. are used. Further, a plasticizer to improve the processability of the filter layer, and an ultraviolet absorber such as Tinuvin (trade name manufactured by Ciba Corporation) to prevent the colorant from fading due to ultraviolet rays may be added.

To form a filter layer on the thin film, an ink prepared by dissolving the colorant and curable binder resin in an organic solvent such as toluene, benzene, ethyl acetate, methyl ethyl ketone, or acetone is used to form an offset or gravure layer. A filter is provided using a printing technique such as , screen, silk, or letterpress, or a photoresist technique, and a step of curing with light or heat is performed sequentially to form a linear or mosaic shape. By repeating this process, you can install the next filter section without damaging the previous filter section with solvent or mechanical force. By repeating the operation for the type of filter you need, you can create the required composite filter. layers can be completed. It is generally preferable to form the filter layer to have a thickness of 1 to 10 μm from the viewpoint of transmittance characteristics.

The thickness of the thin film containing the composite filter layer obtained as described above is 5 to 100 μm, preferably 10 to 50 μm.

It is also preferable to further provide a transparent insulating protective layer made of resin or the like on the obtained composite filter layer. By doing so, the filter layer can be protected from wear and scratches during use, ozone generated during charging, image exposure, and the like.

FIG. 3(A) is a cross-sectional view of the sea urchin knob consisting of the support 1, the adhesive layer 2, and the thin film 3b after printing the composite filter layer, where 3a is the filter layer, R, G.
B shows red, green, and blue filters, respectively. Third
In Figure (B), a protective layer 3c is further provided on the filter layer.

For the above reasons, it is preferable to use the photoreceptor having the structure (B).

The shape and arrangement of the color separation filters constituting the above-mentioned composite filter and the ratio of the number of individual microfilters constituting the composite filter are not particularly limited. If it is drum-shaped, a wire whose lines are perpendicular to the direction of rotation or parallel to the direction of rotation can be used.

However, normally a mosaic configuration as shown in Figures 4(B) and (C) is used, and the size of each filter is as follows:
30~ during color repetition (11.12 in Figure 4)
The thickness is preferably 500 μm.

If the size of the filter is too small, it will be easily affected by other adjacent color areas, and it is also possible to obtain high image density if the width of one filter is equal to or smaller than the particle size of the toner particles. It will also be difficult. Furthermore, if the size of the filter becomes too large, the resolution and color mixing properties of the image will decrease, resulting in deterioration of the image quality.

In addition, FIGS. 3(A) to (B) and FIGS. 4(A) to (C)
) shows the case where so-called three-color separation filters of red, green, and blue are provided. In the figure, R indicates a red filter, G indicates a green filter, and B indicates a blue filter, but the coloring of the composite filter layer is not limited to these three colors, and a filter layer of any color can be formed as necessary. be able to.

The photoreceptor according to the present invention has a photosensitive layer that is sold on a conductive substrate, and the photosensitive layer is composed of sulfur, selenium, amorphous silicon, or combinations of these with tellurium, arsenic, antimony, etc. Photoconductors made of alloys or inorganic photoconductors of oxides, iodides, sulfides, and selenides of metals such as zinc, aluminum, acutimony, bismuth, cadmium, and molybdenum are deposited or bonded. It is formed by dispersing and coating it in a resin. Also, vinyl carbazole, anthracenephthalocyanine,
It is formed by similarly vapor depositing or dispersing an organic electrolyte such as trinitrofluorenone, polyvinylcarbazole, polyvinylanthracene, polyvinylpyrene, polycyclic quinone dye or pigment, disazo dye or pigment, and then applying the resin. Such binder resins include insulating and transparent resins such as polyethylene, polyester, polypropylene, polystyrene, polyvinyl chloride, polyvinyl acetate, polycarbonate, acrylic resin, silicone resin, fluorine resin, and epoxy resin. It will be done. Furthermore, a functionally separated photoconductor having a charge generation layer and a charge transfer layer is also used. The conductive substrate includes metals such as aluminum, iron, nickel, copper, and stainless steel, alloys thereof, or thin layers of these metals provided on a polyester terephthalate film, etc. by laminating or vapor deposition. Various known substrates commonly used in electrophotographic photoreceptors can be used. The shape of the photoreceptor is not particularly limited, and any suitable shape or structure may be created as required, such as a drum shape, an endless belt shape, or a sheet shape.

After the step shown in FIG. 3, the thin film 3b having the filter layer 3a is peeled off from the support l and adhered to the surface of the photoreceptor, or
Alternatively, the thin film may be adhered to the surface of the photoreceptor and then peeled off, but the direction of adhesion of the thin film may be such that the filter layer side is adhered to the photoreceptor surface, or the back side of the thin film (i.e., the adhesive layer side before peeling) is attached to the photoreceptor surface. It may also be glued. As for the method of adhesion,
If the adhesive layer remains on the support side when peeled off, apply the adhesive of the present invention described above to the photoreceptor surface or thin film side by a method such as coating or spraying to uniformly adhere it.
The desired surface of the thin film may be crimped.

In addition, if the adhesive layer is to be attached to the thin film side and peeled off during peeling, the adhesive layer is formed in advance with the adhesive of the present invention described above, and the adhesive layer surface of the peeled thin film is directly applied to the surface of the photoreceptor. It can be attached directly to the When adhering the thin film to the photoreceptor surface with the filter layer side facing outward with the adhesive layer still attached,
Apply adhesive to the photoconductor surface or the filter layer side of the thin film,
After attaching the filter layer side of the thin film to the surface of the photoreceptor, the adhesive layer adhering to the surface may be removed using a solvent or the like.

As the adhesive for attaching the thin film to the photoreceptor, the same adhesive as used for the support and the adhesive layer provided on the thin film can be used. When attaching the thin film to the photoreceptor, the tightness can be improved by applying heat or pressure.

FIG. 1 is a diagram schematically showing a cross section of a photoreceptor 40 produced as described above, in which a photosensitive layer 12 is provided on a conductive member 11, and the desired material produced by the method described above is provided on a conductive member 11. fine color separation filter (in the case of the figure, red (R), green (G)
), a blue (B) color separation filter), and a layer 3 consisting of a thin film 3b is bonded with the adhesive 2 of the present invention described above. Reference numeral 13 denotes the above-mentioned adhesive layer of the present invention for bonding the thin film 3b having the filter 1if3a and the surface of the photoreceptor.

FIG. 1(A) shows an example in which the thin film 3b side is adhered to the photoreceptor surface, and FIG. 1(B) shows an example in which a protective layer 3c is provided on the filter layer in advance but the thin film 3b side is adhered to the photoreceptor surface. Diagram (C)
1(D) shows an example in which the filter layer side of a layer consisting of a filter layer 3a and a thin film 3b is adhered to the photoconductor surface, and FIG. This is an example of a photoreceptor adhered to.

The above conductive member 11 is made of aluminum, iron, or the like.

It may be made of metals such as copper, copper, and stainless steel, or alloys thereof, and may have an appropriate shape and structure as necessary, such as a cylindrical shape or an endless belt shape.

In the above, the structure in which the protective layer 30 or the thin film 3b is present on the surface (FIGS. 1(A), (C), and (D)) is desirable in terms of durability and rigidity.

In the photoreceptor shown in FIG. 1(C), the filter layer 3a is the photoreceptor layer 12.
Since it is located on the side, there is no image blurring due to light scattering, which is relatively advantageous.

Furthermore, the adhesive of the present invention can be adhered onto the photosensitive layer 12 with the adhesive applied to the thin film 3b or the filter N3a side, but in this case, by reducing the heat capacity of the thin film 3b and the filter layer 3a, Even if the temperature of the adhesive of the invention is quite high, the temperature of the photosensitive layer does not rise much during adhesion to the photosensitive layer. Therefore, it is possible to effectively prevent the photosensitive layer 12 from being adversely affected by the melting temperature (for example, crystallization in selenium).

The present invention can also be applied to photoreceptors in which a filter layer is provided below the photosensitive layer. The image forming method using this photoreceptor is described in Japanese Patent Application No. 59-199547, and uses a photoreceptor having an insulating layer, a photosensitive layer, and a transparent conductive member, and is charged with secondary and secondary charging. It is characterized in that image exposure and full-surface exposure with specific light are performed from the filter side on the back side. Figure 1 (E)
and (F) are examples of this type of photoreceptor, and in FIG. 1(E), the thin film side of a layer consisting of a thin film 3b and a filter layer 3a is adhered to the back surface of a transparent conductive member 11 using the adhesive 2 of the present invention. In FIG. 1(F), the filter layer side is adhered to the surface of a transparent N'L electric member (15 is an insulating layer). In this case, as the transparent conductive member 11, one in which a conductive film such as tin oxide is formed on a film by vapor deposition or sputtering is preferably used.

FIG. 5 shows a thin film 3 with a filter layer 3a as described above.
An advantageous method is shown in which the adhesive 2 of the present invention is coated on the photosensitive layer 12 side when adhering the adhesive 2 on the photosensitive layer 12 (for example, when manufacturing the photoreceptor shown in FIG. 1(C)). has been done.

That is, first, as shown in FIG. 5 (A>), a photosensitive layer 12 is formed on a conductive member 11, and an adhesive layer 2 of the present invention is uniformly coated on a release film 16 using a roll coater. It is superimposed on the photosensitive layer 12 as shown at 17.

Then, as shown in FIG. 5(B), they are pressed and completely integrated. Furthermore, as shown in FIG. 5(C), the release film 16 is peeled off and the adhesive layer 2 of the present invention is transferred onto the photosensitive layer 12. Thereafter, the filter N3a is layered and adhered to the photosensitive layer 12 as described above.

In the method shown in FIG. 5, the adhesive 2 is directly exposed to light.
Rather than coating on the releasable substrate 12, it is first coated on the releasable substrate 16 and then transferred onto the photosensitive layer I2, so the coating on the releasable substrate can be performed with a roll coater, an extrusion coater, etc. It is easily reproducible and can be applied uniformly.

In this way, the adhesive is applied onto the releasable substrate, and while the temperature is sufficiently high and the adhesive has good adhesive strength, the photosensitive layer 12 is
A photoreceptor can be produced by stacking them on top of one another, pressing them, and punching them according to the shape. At that time, better bonding strength can be obtained by heating the adhesive layer to some extent by irradiating the adhesive layer with a lamp or the like. Furthermore, this bonding method prevents the photosensitive layer from being damaged or causing poor conveyance. Furthermore, since the heat capacity of the adhesive and the releasable substrate can be made sufficiently small, the temperature of the photosensitive layer 12 during transfer does not rise much even if the temperature of the adhesive is quite high, and the next filter layer 3a can be adhered as it is. Therefore, thermal damage to the photosensitive layer 12 is reduced.

FIG. 6 shows a composite filter having the structure shown in FIG. 1(C) which is laminated onto the photoreceptor surface of the photoreceptor coated with adhesive 12 while peeling off the thin film containing the filter layer from the laminated web. A photoreceptor 1 having the following properties was obtained. In FIG. 6, 31 is an unwinding section for the laminated web, 32 is a winding section for winding up the support after the thin film has been peeled off, 33 is an unwinding section for the film photoreceptor, and 34 is a winding section for the completed photoreceptor. Department. 35 is a handle containing adhesive 2, and the adhesive 2 is applied to the surface of the photoreceptor as it is being unwound by an application roller 37. The amount of adhesive applied is regulated by the three doctor parts. The filter layer surface of the laminated web is pressed onto the surface of the photoreceptor coated with an adhesive by a laminating roller 39, and the thin film having the filter layer is peeled off from the laminated web and adhered to the surface of the photoreceptor, resulting in a completed film-like photoreceptor. is wound up by the winding section 34. At this time, the above lamination and winding are performed in a chamber 30 purged with N2 gas. The support with the adhesive layer from which the thin film has been peeled off is wound up by the winding section 32 .

In the apparatus shown in FIG. 7, a thin film having a filter layer is peeled from a laminated web, cut into a suitable size by a roller cutter 36, and then sent to a photoreceptor drum. The photosensitive drum 40 has the adhesive 2 attached thereto in advance by dipping, coating, or the like. The thin film having the cut filter layer moves there and adheres to the photoreceptor drum. This is N
The process is carried out in a chamber 30 that is replaced with two gases.

The support with the adhesive layer from which the thin film has been peeled off is wound up into a support winding section. The obtained photoreceptor 40 is shown in FIG. 1(C).
It has the structure of

In the above, whether a sheet-like photoreceptor with a color separation member attached is stretched on the drum or a color separation member is stretched on the photoreceptor drum, the sheet-like photoreceptor and the color separation member are stretched on the drum. By arranging the bonded parts of both the photoconductor and the photoreceptor at an angle to the direction of movement of the photoreceptor, the pressure against the cleaning blade is reduced, which improves the cleaning performance, and also improves the separation of the photoconductor from the bonding part and the color separation member. Peeling can also be prevented.

Next, a process for forming a multicolor image using the photoreceptor according to the present invention will be described. First, the entire surface is subjected to primary charging, secondary charging, and simultaneous image exposure to form a primary latent image corresponding to the color separation image density on the photosensitive layer below each filter. Next, by exposing the entire surface to specific light, only the photosensitive layer below the filter through which this specific light is transmitted forms a secondary latent image having a surface potential strength corresponding to the intensity of the second layer image, that is, a potential bounce. form. This secondary latent image is developed with toner having a complementary color to that of the filter. From then on,
Recharging to smooth the surface potential to prevent color mixing to the toner image on the photoconductor, full exposure to specific light to form a potential pattern in the next separation filter section, and toner having a complementary color relationship with the filter. By repeating the development process, a multicolor image is formed on the photoreceptor. This multicolor image is superimposed and transferred onto the transfer material in only one transfer.

Next, the process of forming a multicolor image using the photoreceptor of the present invention will be explained using a specific example. Figures 8 [1] to [8] schematically show the image forming process in a portion of a photoreceptor using an n-type semiconductor such as cadmium sulfide as a photosensitive layer. 11 and 12 in the figure are the door chamber member and photosensitive layer, respectively, as in Figure 1.
3 is the high-resistance three-color (B, G, R) composite filter 3.
Although the layer includes a thin film 3b and a thin film 3b (and a protective layer in some cases), only the filter layer is shown to simplify the diagram.
Other layers are omitted. The adhesive layer 2 of the present invention is also not shown. Further, the graphs at the bottom of each figure in FIG. 8 show the potentials on the surface of each part of the photoreceptor.

First, as shown in FIG. 8 [1], the photoreceptor 4 is charged by the charger 4.
Give a positive corona discharge to the surface of 0. As a result, a positive charge is generated on the surface of the layer 3 containing the composite filter, and a corresponding negative charge is induced on the interface between the photosensitive layer 12 and the layer 3 containing the filter, resulting in the state shown in FIG. 8 [1]. becomes.

Next, as shown in FIG. 8 [2], an alternating current or negative discharge is applied by a charger 5 equipped with an exposure slit to erase the charge on the surface of the composite filter 3 while exposing the image from the multicolor original. administer. In this example, image formation is performed by performing multicolor image exposure of red, green, and blue; however, for ease of understanding, the image formation process will be explained using an original having only a red image as an example.

FIG. 8 [2] shows the state of image exposure from the red image (the part indicated by the arrow Li). 12
Since the layer has λ conductivity, most of the positive charges on the layer 3 are erased, and the negative charges induced in the photosensitive layer 12 are also erased, so that the surface potential becomes close to zero potential.

On the other hand, since the green and blue separation filter sections 3G and 3B do not transmit the red light, some of the positive charges on the layer 3 are erased, but the negative charges in the photosensitive layer 2 remain as they are. However, charges corresponding to the partially erased positive charges are induced in the tetraelectric member 11. In such a charge arrangement, the surface potentials on the green and blue separation filter sections 3G and 3B are close to zero potential. However, as the scorotron charger of the charger 5, the scratching property may be reversed by controlling the grid voltage so as to provide a uniform surface potential of, for example, -200V. Therefore, although the composite filter contains a charge pattern as a primary latent image, a toner image cannot be formed because no surface potential difference occurs.

Next, as shown in FIG. 8 [3], a specific light that causes a potential pattern only in one type of decomposition filter of the composite filter 3,
For example, the entire surface is exposed to blue light obtained by a light source 6 and a blue filter F. In this case, part of the negative charges on the photosensitive layer 2 under the decomposition filter 3B that transmits the blue light L3 and the positive charges on the conductive member l are neutralized, and as shown in FIG.
], negative charges remain between the layer 3 and the photosensitive layer 12 corresponding to the portion of the decomposition filter 3B, and the composite filter 3
A positive surface potential is applied to the top.

As shown in FIG. 8 [4], a negative toner image is formed. In the area of the separation filter 3B where this yellow toner image was formed, the surface potential remains unsaturated by the toner, so as shown in the lower graph, a relatively high surface potential remains. , there is still room for another toner to adhere during the next step of development.

Therefore, as shown in FIG. 8 (5), the surface of the layer 3 is recharged with alternating current or negative direct current, preferably negative corona discharge by a scorotron charger 8, and the lower graph of FIG. 8 (5) is applied. The surface potential is returned to a flat state as shown in
It is preferable to make the surface potential equal to the surface potential in FIG. 8 [2].

Next, as shown in FIG. 8 [6], by exposing the entire surface to green light (arrow LG) obtained by the light source 9 and the green filter F, the negative charges in the photosensitive layer 12 are removed from the conductive member. 11 are neutralized, and a high surface potential shown in the lower graph is obtained in the 3G region of layer 3.

By developing this with a developing device 9 carrying magenta toner T, as shown in FIG. 8 [7], a magenta toner image is obtained in the 3G area.

Next, after recharging (Fig. 8 (8)), the red filter Fi
Although the entire surface is exposed to the red light obtained by I, no potential pattern is generated at this time and development with cyan toner Tc is not performed. Thus, although the above description of the yellow toner image and the magenta toner image on the transfer plate is based on the case where the original is a red image, it is also possible to apply the original to a white, green, blue, yellow, magenta, cyan, or black image. Similarly, in this case, color reproduction is performed by a combination of the three-color separation method and the subtractive color mixture toner of the three primary colors. FIG. 9 is a diagram illustrating the process of color reproduction when such originals of each color are used. In FIG. 9, the horizontal axis represents the color tone of the original, and the vertical axis represents the process at each stage leading to toner image formation when each color original is used.

The code [ζ])' is the -order layer image formation, and the code rOJ is the secondary 't
'tt image formation, the symbol "O" represents the process of each stage of toner image formation. Further, the symbol "↓" indicates that the state in the upper column is maintained as it is, and the blank column indicates a portion where no latent image is formed.

FIG. 10 is a sectional view of essential parts of a multicolor image forming apparatus for copying multicolor images using the photoreceptor 40 described above. 4
0, the film-like photoreceptor 12 is placed on a metal drum 11.
(further layer 3), 1 is a positive DC primary charger, 5 is a negative DC corona discharge Scoro10 charger having an image exposure screen, 6 has a blue filter F II and emits blue light LII;
7 is a developing device containing yellow toner. 8 is a scorotron charger for negative direct current corona discharge; 9 is a light source having a green filter FG and emits green light; 10 is a developing device containing magenta toner; 14 is a scorotron charger for negative direct current corona discharge , 18 is a light source having a red filter FR and emits red light, and 19 is a developing device containing cyan toner. P is a recording paper, 51 is a transfer electrode, 52 is a separation electrode, 53 is a static eliminator for removing residual charges that removes static electricity while exposing the back of the electrode to white light, and 54 is a cleaning blade for removing residual toner.

First, the photoreceptor 40 configured as described above is uniformly positively charged by the charger 4, and then negatively charged or AC charged by the charger 5. At the same time, an image from the three primary color originals of blue, green, and red is applied Scan exposure.

On the photoreceptor 40, a white or blue light source is provided with a zero-order blue filter F, in which a color-separated primary latent image corresponding to the intensity of image exposure from the original is formed for each color separation filter of the composite filter. 6, an electrostatic charge image corresponding to the second layer image is formed in the area of the blue separation filter, and this is developed into yellow by a yellow developer 7.

Next, after erasing the electrostatic charge image remaining in the region of the blue separation filter using a negative scorotron charger 8, the entire surface is exposed to light using a white or green light source 9 equipped with a green filter F, and magenta development is performed. Magenta is developed using device 10.

Next, after erasing the remaining electrostatic image by negative scorotron charging rr14, the entire surface is exposed LR by a white or red light source 18 equipped with a red filter FR, and cyan is developed by a cyan developer 19.

In this way, a multicolor toner image corresponding to the original is formed on the photoconductor, transferred to the transfer material P fed at the same timing by the action of the transfer electrode 51, and separated by the action of the separation electrode 52. After that, the image is fixed by a fixing device (not shown).

On the other hand, after the photoreceptor 40 after transfer is neutralized by a static eliminator 53, residual toner is cleaned by a cleaning blade 54 and prepared for the next image formation.In the above description, an n-type semiconductor is used as the photoreceptor. However, a photoconductor using a p-type semiconductor such as selenium may also be used, and in this case, there is basically no difference except that the sign of the charge is reversed.

Of course, if the photoreceptor can be used as an n-type or a p-type, either type may be used.

As is clear from the above description, the photoreceptor according to the present invention is the only method in which an insulating composite filter is provided on the photosensitive layer.
After forming a primary latent image through image exposure, the entire surface is exposed using the three-color separation method to form a secondary latent image for each color of the color separation filters that make up the composite filter. The process of developing and recharging is repeated to obtain a multicolor image.

As mentioned above, a known method is used that utilizes charges induced in the photosensitive layer, but when forming a secondary latent image by the second and subsequent full-surface exposures, the problem caused by the residual latent image from the first exposure is eliminated. Therefore, recharging is required. This recharging is carried out by alternating current or direct current discharge of opposite polarity to the remaining electrostatic image, preferably by corona discharge of opposite polarity to the remaining electrostatic image by a scorotron charger. Note that "charging" as used in the above method includes cases in which the surface potential obtained when charging becomes O or the surface charge disappears.

The present invention also provides -order charging, secondary charging with a polarity substantially opposite to the -order charge, recharging for smoothing the potential pattern after image exposure, full-surface exposure with specific light, and specific color toner. It can also be applied to an image forming method in which development is repeated.

The above development is preferably carried out by a magnetic brush method, and the developer is either a so-called primary developer using non-magnetic toner or magnetic toner, or a so-called secondary developer containing a mixture of toner and magnetic carrier such as iron powder. Can also be used with For development, a method of direct rubbing with a magnetic brush may be used, but in order to avoid damage to the formed toner image, especially after the second development, a developing method in which the developer layer does not come into contact with the photoreceptor surface is recommended. A developing method in which the gap between the developing sleeve and the photoreceptor is set larger than the thickness of the developer layer on the sleeve (provided there is no potential difference between the two),
For example, U.S. Patent No. 3,893.418, JP-A
Publication No. 5-18656, Japanese Patent Application No. 58-57446, Japanese Patent Application No. 58-238295, Japanese Patent Application No. 58-238
It is particularly preferred to use a method such as that described in each specification of No. 296. In this method, an alternating electric field is formed in the developing area, and an alternating electric field is formed in the developing area, and a two-component developer consisting only of non-magnetic toner and a two-component developer consisting of non-magnetic toner that can freely select the coloring are used. It is preferable to carry out development without bringing the agent layer into contact with each other. However, a developer using magnetic toner may be used.

Color toners used for development usually consist of known binding resins used in toners, various chromatic colors such as organic and inorganic pigments and dyes, and various additives such as charge control agents.
Electrostatic image developing toners made by known techniques can be used. Examples of carriers include iron powder and ferrite powder, which are usually used for electrostatic images, and more preferably high-resistance magnetic carriers such as iron powder or ferrite coated with resin, or magnetic materials dispersed in resin. , various known carriers can be used.

In addition, the applicant previously filed the patent application No. 58-2496.
69 and No. 5B-240066 may be used.

All of the above explanations have been made regarding embodiments of color copying machines that use so-called three-color separation filters and three primary color toners, but embodiments of the present invention are not limited thereto, and various multi-color image recording Can be widely used in devices, color photo printers, etc.

It goes without saying that the combination of the color of the separation filter and the color of the toner corresponding thereto can be arbitrarily selected depending on the purpose.

When a multicolor original is copied using this apparatus, a beautiful copy without image shift or color blurring can be obtained.

Furthermore, in the above explanation, the spectral characteristics of light for full-surface exposure can be obtained using blue (B), green (G), and red (R) filters, but they can also be obtained by means other than filters. Moreover, its spectral characteristics are not limited to G, B, and R. In short, any spectral characteristic is sufficient as long as it forms a potential pattern only in a specific filter section corresponding to the specific light on the photoconductor by exposing the entire surface to the specific light. Therefore, the above-mentioned "multiple types of filters" include the car model's color separation filter (a filter that transmits light only in a specific wavelength range), filter-free areas (which may be transparent resin or air, etc.).
The photoreceptor may have a layer consisting of the following. The portion without this filter is regarded as a transparent filter, and is included in the above-mentioned "multiple types of filters".

EXAMPLES Hereinafter, the present invention will be specifically explained using Examples, but the embodiments of the present invention are not limited thereby.

Actually, j'li 9+11 Ketjen blank (B conductive carbon) and vinyl chloride.
A 2.3 μm thick conductive layer made of a maleic acid copolymer, a 21.5 μm thick charge transport layer (CTL) made of the following compound 1, and a 1 μm thick charge generation layer made of the following compound 2. (CC;L) was sequentially laminated on the photoreceptor,
Using the apparatus shown in the figure, a 2 μm thick color separation filter having the structure shown in FIGS. 1(C) and 4(B) and the spectral characteristics shown in FIG. 11 was placed on a 17x15 μm polyester film. The provided parts were joined together to produce an image carrier.

In this example, a commercially available anaerobic polyester adhesive (tetraethylene glycol methacrylate monomer is cured at room temperature in the absence of air) was used to bond (adhere) the thin film having the above-mentioned filter layer to the photoreceptor. ) was used. When the IS film was attached to the sheet-like photoreceptor, the photoreceptor wound up by the photoreceptor winding section was left in an N2 gas atmosphere at room temperature for about 3 hours to harden the adhesive.

Next, the above-described image carrier was incorporated into an image forming apparatus shown in FIG. 12, and an image was formed. In FIG. 12, the image carrier 40 was charged by a DC scorotron corona discharger 4 so that the surface potential of the image carrier 40 was -2000 V while uniformly exposing the image carrier 40 to light using the lamp of the primary charger 4.

In this case, the peripheral speed of the image carrier was 88 tm/sec.

Next, while performing image exposure, a secondary charger 5 consisting of a scorotron corona discharger having an alternating current component is used to charge the image carrier 40.
was charged so that its surface potential was +70V. During image exposure, infrared and ultraviolet light was cut off using a filter in advance.

Next, by performing uniform exposure through a blue filter, the white area of the original paper is +70V and the black background area of the original paper is -30V.
An electrostatic image with a contrast of approximately 370 V at 0 V was formed. This potential contrast was about 1·/3 of that when a transparent insulating layer was used. This electrostatic image was developed using a developing device 7.

In the developing device 7, 70-t% of magnetophyte was dispersed in the resin, the average particle size was 25 μm, and the magnetization was 30 emu/g.
, a carrier having a resistivity of 10" Ω-cm or more; and a styrene-acrylic resin containing 10 parts by weight of a benzidine derivative as a yellow pigment and other charge control agents with an average particle size of 1.
08m positive charging non-magnetic toner T;
was used under conditions such that the ratio of toner to developer was 20 wt%. In addition, the developing device 7 clearly shown in FIG.
The outer diameter of the developing sleeve 47 is 30 layers 1, the rotation speed in the direction of arrow B is 1100 rpm, the magnetic flux density of the N, 5ift pole of the magnet body 43 rotating in the direction of arrow A is 900 Gauss, the rotation speed is 1000 rρm, and the developing The thickness of the developer layer in the range 0.
3ms, the gap between the developing sleeve 47 and the image carrier 40 is 0.
5, and the developing sleeve 47 is equipped with a DC voltage of -100V and 2. Qktlz, superimposed voltage of 100OV AC voltage (
The amplitude of the method wave was based on non-contact development conditions in which J'Fxtooov was applied.

Incidentally, while the electrostatic image was being developed in the developing device 7, the other similarly configured developing devices 10 and 19 in FIG. 12 were kept in a non-developing state. It connects the developing sleeve to the power source 45.
This is achieved by separating the developing sleeve from the 46 and leaving it in a floating state, or by grounding it, or by actively applying a DC bias voltage of the same polarity as the electrostatic image (that is, the opposite polarity to the toner charging) to the developing sleeve. ,
It is preferable to apply a DC bias voltage. Further, the driving of the developing device was stopped during non-developing time. Since the developing devices 10 and 19 are also designed to perform development under the same non-contact developing conditions as the developing device 7, the developer layer on the developing sleeve does not need to be removed. This developing device 10 uses a developer having a composition in which the toner in the developing device 7 is changed to a toner containing polycungest phosphoric acid as a magenta pigment instead of a yellow pigment. A developer was used in which the toner was changed to a toner containing a copper phthalocyanine derivative as a cyan pigment. Of course, color toners based on other pigments or dyes can be used, and the order of developing colors can be appropriately determined so as to obtain clear color images. In particular, the order of developing colors may be related to the sharpness of the color image and the potential contrast that can be obtained, and therefore needs to be carefully determined.

After the surface of the developed image (U special holiday 40) was recharged with a Scorotron corona charger to a surface potential of +110 V in the developing device 7, uniform exposure was performed through a green filter. The potential of the image is white background +9
For 5V, the black area was -240cm. This electrostatic image is transferred to the developing sleeve with a DC component + IOV and an AC component of 2.0
Development was carried out in the developing unit 10 under the same conditions as in the developing unit 7 except that a voltage of 1000 V was applied.

Similarly, a scorotron corona charger increases the surface potential to +
After recharging to 130 V, uniform exposure was performed through a red filter. As a result, an electrostatic image of +100 V for the white background and -200 V for the black background is formed, and this electrostatic image is applied to the developing sleeve with a DC component of +50 V and an AC component of 2.0 V.
Development was carried out by the developer 9 under the same conditions as in the developer 7 except that a voltage of 100 OV was applied.

When this third development is performed and a three-color image is formed on the image carrier 40, the corona discharger 20 and the pre-transfer lamp are activated, thereby transferring the color image. The image was easily transferred onto copy paper P using a transfer device 51, separated using a separator 52, and fixed using a heat roller fixer 21.

The image carrier 40 to which the color image has been transferred is charged with a static eliminator while being irradiated with white light, residual toner is removed from the surface by the cleaning blade 54 of the cleaning device 22, and the surface on which the color image has been formed is removed by the cleaning device. 22, one cycle of color image recording was completely completed.

The image forming conditions in Example 1 are summarized in Table 1 below.

Margin below, continued on next page.

The image carrier 40 has a N substrate, a 60 μm thick As2Se photosensitive layer exhibiting spectral characteristics as shown in FIG. 14, and a structure shown in FIG. 4(B). A color separation filter with a thickness of 2 μm having the spectral characteristics shown in the figure was
A material provided on a 5 μm polyester film and bonded was used. The adhesive used was the same as in Example 1. Image formation similar to Example 1 was carried out under the conditions shown in Table 2 below. The drum diameter of the photoreceptor used was 2.
00 mm, the circumferential speed of the photoreceptor drum is 180 mm/se
It was e.

Margin below, continued on next page.

Example 1.2 is an example in which a thin film including a filter layer is attached to a sheet-like photoreceptor, but in this Example 3, the thin film side is subjected to mold release treatment, and the support side is mold released. On the web, the process was stopped so that the adhesive remained on the support side during peeling.
A composite filter layer was printed to create a laminated web as described above. Using the apparatus shown in FIG. 7, a thin film serving as a filter layer was peeled off from the laminated web, cut into a suitable size, and then sent to a photoreceptor drum. An adhesive was applied to the photoreceptor drum in advance by dipping.

In this example, when a thin film was attached to the photoreceptor drum, it was left in an N2 gas atmosphere at room temperature for about 3 hours.

The obtained photoreceptor has the structure shown in FIG. 1(C). There is an adhesion method in which a filter layer is installed on the side of the photoreceptor as shown in Figure 1 (C), and a thin film with a filter layer is installed in Figure 1 (C).
) (Figure 1 (A): i
Separate the light body surface and the filter layer. ). However, it is preferable to bond as shown in FIG. 1(C). The reason for this is that it is resistant to wear and scratches during use, and
It has the advantage that the filter layer is not exposed to ozone. If there is a risk of contamination of the photoreceptor due to the influence of the adhesive,
The configuration shown in FIG. 1(B) is desirable.

Although the adhesive used in Examples 1 to 3 is non-water soluble, in this comparative example, a water soluble adhesive (e.g., casein) was used to adhere the filter, and the filter was similarly subjected to image formation. did.

As a result, the images produced by the photoreceptor produced using the adhesive according to the example were good, whereas when produced using a water-soluble adhesive, image fading occurred depending on the type of adhesive. There were a variety of cases, including some with no image contrast, and some with no toner adhesion and no image formation. None of the photoreceptors in which an adhesive layer of a water-soluble type adhesive was interposed could produce images superior to those produced by the photoreceptor using the adhesive according to the examples.

With water-soluble adhesives, since the adhesive itself has low resistance, the charge may not be retained in the formed primary latent image and may flow to another filter section, or may be injected from the substrate during primary charging. It is thought that the above phenomenon occurs because charges of opposite polarity to the primary charges are not trapped.

Therefore, it is necessary to use a high resistance adhesive of the type according to the invention to bond the photosensitive layer and the filter layer.

[Brief explanation of the drawing]

The drawings are for illustrating and explaining the present invention, and FIGS. 1(A), (B), (C), (D), (E), and (F) are partial cross-sectional views of various photoreceptors. ,' Fig. 2 is a partial cross-sectional view of a thin film provided on a support, Fig. 3 (A) and (B) are cross-sectional views of a laminate having a composite filter, Fig. 4 (A), ( B) and (C) are partial plan views showing various patterns of the filter; Fig. 5 (A), (B), and (C) are partial cross-sectional views of the main stages showing other bonding methods; Fig. 6 , FIG. 7 is a schematic diagram showing the process of adhering the filter layer to the photoreceptor, FIG. 8 (1), [2], [3], [4], [5] [6]
, [7] and [8] are diagrams explaining the image formation process from a red original, Figure 9 is a diagram explaining the image formation process from various colored originals, and Figures 1O and 12 are multicolor image formation. Cross-sectional view of the device, 1st
FIG. 1 is a spectrum diagram showing the spectral characteristics of the filter, FIG. 13 is a sectional view of the developing device, and FIG. 14 is a graph showing the photosensitivity of the photosensitive layer. In addition, in the symbols shown in the drawings, l...Support 2.13...Adhesive layer 3a...Filter layer 3b...Thin film 3C...Protective layer 11...Conductor Sexual member 12: photosensitive layer. Agent Patent Attorney Hiroshi Aisaka Figure 2 Figure 3 Funeral Figure 4 Figure 5 Figure 6 Figure 7 Figure 11 - Figure 12 [1] [4] Figure 8 [21 animals [3] [5] (8) Figure 8 [61 1 [7] r. Book section also] Secret ↓ Time (voluntary) procedural amendment October 1985 Patent Office District Officer Kuro 1) Akio Tono・1 1. Indication of the case Showa 1961 Patent Application No. 110314 2, Name of the invention Photoreceptor 3, Person making the amendment! Relationship with 11 cases Patent applicant address No. 26-2 Nishi-Shinjuku IT, Shinjuku-ku, Tokyo Name Name
(127) Roku Konishi Photo Industry Co., Ltd. 4, Agent address: 2-4-11 Shibasaki-cho, Tachikawa-shi, Tokyo FIME 0425-24-5411tl15 -1 - Name (7605) Patent attorney Hiroshi Aisaka 5, Correction Date 6 of the order, the number of inventions increased by amendment is corrected to ``No. 852se3J, ゛°--1:I
L

Claims (1)

[Claims] 1. A photoreceptor in which a layer having a color separation function is adhered to the upper side and/or the lower side of the photosensitive layer via an anaerobic polyester adhesive.