JPS635350A - Photosensitive body - Google Patents

Abstract

PURPOSE:To obtain the titled body capable of giving a good adhesion which satisfies performances such as uniformity of an adhering layer by adhering a layer having a color separating function to an upper or/and a lower sides of the photosensitive body through a double faced sticking material which mounts sticking layers on both surfaces of a substrate, respectively. CONSTITUTION:The layer having the color separation function is adhered to the upper or/and the lower sides of the photosensitive layer 12 through the double faced sticking material which mounts the sticking layers on the both surfaces of the substrate 25 respectively. The double faced sticking material (especially, the double faced sticking tape 26 or film) is used for the adhesion of the color separation layer (especially, the color separation parts such as the mosaic filter, etc.). The double faced sticking material is formed by coating the sticking agent on the both surfaces of the substrate 25, and instantly, adheres. As the double faces sticking tape 26 is preferably formed by using the substrate of a transparent film, said tape has the advantages of being trans parent and having uniform thickness, and has stiffness and high mechanical strength.

Description

[Detailed description of the invention] a. INDUSTRIAL APPLICATION FIELD The present invention relates to photoreceptors, particularly electrophotographic photoreceptors.

mouth. 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 toner image is transferred to a transfer material. Further, for example, using an apparatus in which a plurality of photoreceptors are arranged according to the number of separated colors, 7. There is a method and apparatus in which imagewise exposure and development of each color is performed on each SW light body to form a toner image of each color, and this is sequentially transferred to a transfer material.

However, the former method and apparatus have drawbacks such as it takes a long time to record an image and it is difficult to speed up the process, since the photoconductor is rotated multiple times to form a toner image of each color. . In addition, the latter method and device use a plurality of irradiators in parallel, so although they are advantageous in terms of high speed, they have drawbacks such as the device being large and expensive. Furthermore, in both the former and the latter, since transfer is repeated multiple times, there is a problem in that it is difficult to align the images during transfer.

As a solution to these shortcomings, a patent application filed in 1986-18
No. 5440, No. 59-187044, No. 59-1
No. 99547, No. 60-229524, etc., a composite filter layer in which multiple types of microfilters of different colors are arranged in a mosaic pattern is placed above the angry light layer (
An image forming method using a photoconductor having a photoconductor on the side to which toner adheres during development) or on the lower side (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 the photoreceptor,
, G, and B to form an electrostatic image corresponding to the light transmitted through the filter on a portion of the composite filter corresponding to the specific filter, and using toner of a specific color. The process of developing and smoothing by recharging is repeated for each type of filter to form a multicolor image on the photoreceptor, which has the advantage of requiring only one image exposure and eliminating the need for alignment. Yes, you can easily and easily produce high-quality multicolor images.

C. 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 photoreceptor used in this image forming method, the main agent E of a polyester film laminating adhesive manufactured by Dainippon Ink and Chemicals Co., Ltd. is used for adhesion between the photoreceptor and the insulating layer.
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 ketone 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, which is a color separation filter, onto the spectroscopic 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 between the photoreceptor and the color separation member (mosaic filter) must be uniform.

(2). The aggregation rate during curing is small (if it is large, air bubbles will occur 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 dissolve 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). A highly insulating material is best (if it is conductive, charge will flow and the image will look blurred).

two. OBJECTS OF THE INVENTION An object of the present invention is to provide a photoreceptor in which color separation members (layers) are adhered using an adhesive that satisfies the above-mentioned various performances.

Ho. The structure of the invention and its effects, that is, the present invention is characterized in that a layer having a color separation function is attached to the upper side and/or lower side of the photosensitive layer via a double-sided adhesive material in which adhesive layers are provided on both sides of the base material. This is related to the photoreceptor that is used.

According to the present invention, the above-mentioned double-sided adhesive material (especially double-sided adhesive tape or film) is used to attach the color separation layer (especially the color separation member such as the mosaic filter mentioned above). Adhesive materials are made by coating both sides of a base material, and take advantage of the adhesive's ability to bond instantly, whereas conventional adhesives have problems with workability.

The double-sided adhesive tape that can be used in the present invention has a structure as shown in FIG. As the base material 25, nonwoven fabric, Japanese paper, cellophane, polyester, OPP7 film, cloth, urethane foam, vinyl foam, polyethylene foam, styrene foam, etc. are used. However, in order to attach a thin film having a filter layer to a photoreceptor, the base material needs to be insulating. Further, in terms of image formation, the thinner the base material is, the more preferable it is. Peeling Gi 16a, +6
For b, double-sided separated paper coated with silicone on both sides is preferably used. The adhesives 2a and 2b on both sides may be acrylic, rubber, or photomelt type;
As the rubber type, a solvent type may be used. The adhesive also needs to be highly insulating. When using a solvent-based adhesive, it is preferable to coat the surface of the photoreceptor with an insulating layer in order to avoid contamination of the photoreceptor by the solvent.

The above-mentioned double-sided adhesive (film) tape 26 is preferably made of a transparent film as a base material, and has advantages such as being transparent and having a uniform thickness. Furthermore, the presence of the base material gives the tape stiffness and increases mechanical strength.

Double-sided adhesive film tape has excellent insulation properties and can be used under pressure,
Since it can be attached without the need for heating, it is suitable for attaching a thin film having a filter layer and a photoreceptor.

Moreover, among this tape, the adhesive on the photosensitive layer side and the adhesive on the filter side can be of different types, and adhesives that are compatible with the respective mating materials can be selected and provided.

In this way, by providing the color separation layer on the photoreceptor through the double-sided adhesive material 26 with adhesives on both sides, the light-separating layer and filter layer can be brought into close contact with each other relatively easily. When used, you can choose one that has high insulation properties and does not contaminate the photoreceptor or filter layer. Similarly, the emission spectrum of image exposure (principal wavelength 450 nm, 550 nm
, 650 nm, etc.) can be selected.

It is thought that when a water-insoluble adhesive is used, the amount of charge troughed at the interface between the light-transmitting layer and the adhesive layer is higher than when the adhesive layer is not used. In addition to the function of bonding the light scattering layer and the filter layer, it also protects the photosensitive layer.

The thickness of the adhesive material of the present invention is preferably about 1 micron when attaching the angry light 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 thin film from the support, and a step of peeling off the thin film from the support, and removing the thin film having the filter layer from the photosensitive layer. This method includes the step of attaching the above-mentioned adhesive material to the upper or lower side.

As the support used in this method, film-like substrates having appropriate hardness and flexibility, such as various plastic films such as polyethylene terephthalate, polycarbonate, polystyrene, polyethylene, and triacetate, are preferably used. The thickness of these supports varies depending on the properties of the material, but is approximately 100 μm.
It is preferable to set it as approximately.

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 plastics as the support, and its thickness is not particularly limited, 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 as thin as possible, and in practice it is preferably 5 to 100 μm thick. Moreover, when the thin film is provided on the photosensitive layer, 10
Although it is preferable to have a specific resistance value of 3 Ω-cm or more, no particular limitation is necessary when it is provided below the light-absorbing 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 adhesion between the thin film and the adhesive layer is made higher than the adhesion between the adhesive layer and the support, the adhesive layer will adhere to the thin film side and peel off when peeled off, and if the strength relationship of the adhesion is reversed, , the adhesive layer remains on the support side, resulting in a thin film without an adhesive layer.

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 cap cyanine, methylene blue, cyanine blue, and Victoria blue are used for blue filters. Further, for green filters, organic dyes or pigments such as brilliant green, malachite green, and naphthol green are used, and for red filters, organic dyes or pigments such as fuchsin, phenosafranin, rhodamine B1 naphthol red, etc. are used.

In addition, plasticizers, etc. to improve the processability of the filter layer,
In order to prevent the colorant from fading due to ultraviolet rays, an ultraviolet absorber such as Tinuvin (trade name, manufactured by Ciba Corporation) may be added.

To form a filter layer on the thin film, use an ink obtained by dissolving the colorant and curable binder resin in an organic solvent such as toluene, benzene, ethyl acetate, methyl ethyl chloride, acetone, etc. A filter is provided using a printing technique such as offset, gravure, 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, the next filter section can be installed without destroying the previous filter section with solvent or mechanical force, and by repeating the operation for only the type of filter required, the required complex The filter layer can be completed. Generally, it is preferable to form the filter layer to have a thickness of 1 to IO 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 preferable to further provide an insulating protective layer made of resin or the like and transparent to white light or infrared light on the obtained composite filter layer. By doing so, the filter layer can be protected from abrasion, scratches, dirt, ozone generated during charging, image exposure light, etc. during use. Figure 3 (A
) is the support 1 after printing the composite filter layer,
It is a sectional view of a wesob made of an adhesive layer 2 and a thin film 3b, where 3a is a filter layer and R, G, and B indicate red, green, and blue filters, respectively. Figure 3 (Japanese) is
A protective layer 3c is further provided on the filter layer.

For the above reasons, it is preferable to use a 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. When the light absorbing body is drum-shaped, it is possible to use one in which the lines are perpendicular to the rotation direction or parallel to the direction of rotation.

However, normally a mosaic structure as shown in Figure 4 (B) and (C) is used, and the size of each filter is determined by the color repetition width (!, 22 in Figure 4). 30
It is preferable to set it as 500 micrometers.

If the size of the filter is too small, it will be easily affected by other adjacent color parts, and if the width of one of the filters is equal to or smaller than the particle size of the toner particles, it may be difficult to obtain high image density. It is also difficult to create. 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),
4(A) to 4(C) all show 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 day 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 photoconductive layer provided on a conductive substrate, and the photosensitive layer is made of sulfur, selenium, amorphous silicon, or an alloy of these with tellurium, arsenic, antimony, etc. or inorganic photoconductors of oxides, iodides, sulfides, and selenides of metals such as zinc, aluminum, acetimone, bismuth, cadmium, and molybdenum, or in a binder resin. Formed by dispersion coating. In addition, organic photoconductors such as vinylcarbazole, anthracenephthalocyanine, trinitrofluorenone, polyvinylrubazole, polyvinylanthracene, polyvinylpyrene, polycyclic quinone dyes or pigments, disazo dyes or pigments can be applied thinly or after being dispersed in a resin. It is formed by Such binder resins include polyethylene, polyester, polypropylene, polystyrene, polyvinyl chloride, polyvinyl acetate, polycarbonate, acrylic resin, silicone resin, fluororesin,
Examples include insulating and translucent resins such as epoxy resins. 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.

The thin film 3b having the filter layer 3a is peeled off from the support 1 and adhered to the surface of the photoreceptor, or the thin film 3b is peeled off after adhering to the surface of the photoreceptor. It may be adhered to the photoreceptor surface, or the back side of the thin film (ie, the adhesive layer side before peeling) may be adhered to the photoreceptor surface.

As for the adhesion method, if the adhesive layer remains on the support side when peeled off, the above-mentioned double-sided adhesive material may be uniformly adhered to the photoreceptor surface or the thin film side, and the desired surface of the thin film may be pressed. When attaching the thin film to the photoreceptor surface with the adhesive layer still attached, with the filter layer side facing outward, apply a double-sided adhesive to the photoreceptor surface or the filter layer side of the thin film, and place the filter layer side of the thin film on the photoreceptor surface. After pasting, 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 adhesives as those used for the support and the adhesive layer provided on the thin film can be used. When attaching a thin film to a photoreceptor, adhesion can be improved by applying heat or pressure.

FIG. 1 is a diagram schematically showing a cross section of an angry light body 40 created as described above, in which a light-absorbing layer 12 is provided on a conductive member 11, and a light-absorbing layer 12 is provided on the conductive member 11. The required fine color separation filters (in the case of the figure, red (R), green (G)
), blue (B) color separation filter) group and a layer 3 consisting of a thin film 3b is the above-mentioned double-sided adhesive material 2.
It is glued with 6. Figure 1 (A) shows an example in which the thin film 3b side is adhered to the photoreceptor surface, and Figure 1 (B) shows an example in which an insulating protective layer 3c is previously provided on the filter layer, but the thin film 3b side is adhered to the photoreceptor surface. , FIG. 1(C) shows the filter layer 3a and the thin film 3.
An example in which the filter layer side of the layer consisting of b is adhered to the photoconductor surface, FIG. 1(D) shows an angry photoreceptor in which a protective layer 3c is previously provided on the filter layer 3a, but the protective layer 3c side is adhered to the photoconductor surface. This is an example.

The above conductive member 11 is made of aluminum, iron, nickel,
It may be made of metal such as copper, stainless steel, or an alloy thereof, and may have an appropriate shape and structure as necessary, such as a cylindrical shape or an endless belt shape.

In the above, a configuration in which the protective layer 3c or thin film 3b is present on the surface {FIGS. 1(B), (C), and (D)} is desirable from the viewpoint of durability and rigidity. Since the filter layer 3a is present on the light scattering layer 12 side of the light scattering body shown in FIG. 1C, there is no image blurring due to light scattering, which is relatively advantageous.

Further, the adhesive material of the present invention can be attached to the light-absorbing layer 12 while being provided on the thin film 3b or filter layer 3a side.
At this time, by reducing the heat capacity of the thin film 3b and the filter layer 3a, the temperature of the irradiating layer does not rise much when it is attached to the phosphorescent layer even if the temperature of the adhesive is quite high. Therefore, it is possible to effectively prevent the photosensitive layer 12 from being adversely affected by the temperature at the time of melting (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. 199547/1983, and uses a photoreceptor having an insulating layer, a photosensitive layer, and a transparent conductive member, and primary and secondary charging is carried out. It is characterized in that it is performed from the insulating layer side, and the image exposure and the entire 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, as shown in Figure 1 (E).
The thin film side of the layer consisting of the thin film 3b and the filter layer 3a is attached to the back surface of the transparent conductive member 11 with a double-sided adhesive in two days,
In FIG. 1(F), the filter layer side is adhered to the surface of the transparent conductive member 11 (15 is an insulating layer).

In this case, as the transparent conductive member 11, one in which a conductive film of tin oxide or the like 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 adhesive 2 is applied to the photosensitive layer 12 side when adhering the adhesive 2 onto the photosensitive layer 12 (for example, when manufacturing the photoreceptor shown in FIG. 1(C)). .

That is, first, as shown in FIG. 5(A), a light-absorbing layer 12 is formed on a conductive member 11, and then a film with an adhesive layer 2, which is shown in a simplified diagram in the same figure, is formed as indicated by an arrow 17. It is superimposed on the photosensitive layer 12.

Here, 2 collectively indicates the three layers 2a-25-2b shown in FIG. Then, as shown in FIG. 5(B), the adhesive layer 2 is pressed at a sufficient temperature to be completely integrated. Furthermore, as shown in FIG. 5(C), the release film 16 is peeled off and the adhesive layer 2 is exposed to light! Transfer onto +2. Thereafter, the filter layer 3a is stacked and adhered to the angry light layer 12 as described above.

In the method shown in FIG. 5, the adhesive 2 is directly applied to the light absorbing layer 12.
Rather than coating on top of the releasable substrate 16, it is first coated on the releasable substrate 16 and then transferred onto the angry light layer 12, so the coating on the releasable substrate can be done using a roll coater, an extrusion coater, etc. It is easy to apply, has good reproducibility, 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, it is stacked on the light-absorbing layer 12 and pressed, and then punched according to its shape. You can create a light body by doing this.

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. In addition, since the heat capacity of the adhesive and the releasable substrate can be made sufficiently small, even if the temperature of the adhesive is quite high, the temperature of the light-absorbing layer 12 during transfer does not rise much, and the next filter layer 3a is bonded as it is. As a result, thermal damage to the light absorbing layer 12 is reduced.

FIG. 7 shows the method of FIG. 5 more specifically. That is, while peeling off the thin film having the filter layer from the laminated fabric, it is laminated onto the photoconductor surface of the photoconductor using an adhesive to form the photoconductor 1 having a composite filter having the structure shown in FIG. 1(C). Obtained. In Figure 7, 31
32 is a winding part for winding up the support after the thin film has been peeled off; 33 is a winding part for the film-like photoconductor; and 34 is a winding part for the completed photoconductor. 35 is a double-sided adhesive tape unwinding part, 37 is the same Hakurigi winding part, and 3rd is the other Pakurigi winding part. The filter layer surface of the laminated web is pressed onto the surface of the photoreceptor (after the adhesive has been transferred) by the 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, completing the process. The film-like photoreceptor is wound up by the winding section 34. 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. 8, after the double-sided adhesive tape is transferred to the laminated web using the above method, the thin film having the filter layer is peeled off, and the film is cut into an appropriate size using a roller cutter 36.
sent to the photoreceptor drum.

The laminate web may be heated by an external heating device to melt the adhesive and make it adherent, or both the photoconductor drum and the laminate web may be heated. Further, a heating mechanism may be provided in the laminated web unwinding section 31 and the support section of the photoconductor drum 40 to heat one or both. The thin film with the cut filter layer moves thereto and adheres to the photoconductor drum.

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 phosphor 40 has the structure shown in FIG. 1(C).

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. Placing the bonded parts of both the disassembly members at an angle with respect to the direction of movement of the photoreceptor reduces the pressing force on the cleaning blade, improving cleaning performance and preventing the peeling of the photoreceptor from the bonded parts and color separation. It is also possible to prevent peeling of the parts.

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 angry light layer below each filter. Next, by exposing the entire surface to a specific light, a secondary latent image having a strength of surface potential corresponding to the intensity of the primary latent image, that is, a potential pattern is formed only on the photosensitive layer below the filter through which this specific light has passed. Form. This secondary latent image is developed with toner having a complementary color to that of the filter. From then on,
In order to prevent color mixing with the toner image on the photoreceptor, recharging is performed to smooth the surface potential, full exposure of specific light is performed to form a potential pattern in the next decomposition filter section, and the relationship between the filter and complementary colors is determined. By repeating the development process with a certain toner, 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 S [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 a conductive member and a light trapping layer, respectively, as in FIG.
3 is the high-resistance three-color (B, G, R) composite filter 3.
a and a thin film 3b (and a protective layer in some cases), but to simplify the diagram, only the filter layer is shown.
Other layers are omitted. The double-sided adhesive material 2 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. S [1], the light absorbing body 4 is
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 light trapping layer 12 and the layer 3 containing the filter, as shown in FIG. 9 [1]. state.

Next, as shown in FIG. 9 [2], alternating current or negative discharge is applied by the 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 described using an original having only a red image as an example.

FIG. 9 [2] shows image exposure from the red image (arrow L.
) indicates the state of the part. The red light L, passes through the red color separation filter section 3R of the layer 3 and makes the photosensitive layer 12 below it conductive, so that most of the positive charges on the layer 3 are erased and the light in the photosensitive layer 12 is The negative charges induced by the above are also erased, and 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 L1, some of the positive charges on the layer 3 are erased, but the negative charges in the angry light layer 12 remain as they are. However, charges corresponding to the partially erased positive charges are induced in the conductive 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 polarity may be reversed by controlling the grid voltage 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. 9 [3], specific light, such as blue light L. obtained by the light source 6 and the blue filter F, produces a potential pattern in only one type of the decomposition filter of the composite filter 3. Perform full exposure with .

In this case, blue light L. A part of the negative charge on the photosensitive layer 12 at the bottom of the decomposition filter 3B that passes through the decomposition filter 3B and the positive charge on the conductive member 1 are neutralized, and as shown in FIG. A negative charge remains between the corresponding layer 3 and the optical layer 12, giving a positive surface potential on the composite filter 3.

As shown in FIG. 9 [4], this is developed by the developing device 7 carrying negative yellow toner T7, thereby forming a partial yellow toner image of the separation filter 3B. Separation filter 3 on which this yellow toner image is formed
In area B, the surface potential has not yet been saturated by the toner, so as shown in the lower graph, a relatively high surface potential remains, and another toner is absorbed by the next development process. There is still room for attachment.

Therefore, as shown in FIG. 9 [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. 9 [5] to return to a state of flat surface potential, such as
It is preferable to make it equal to the surface potential in FIG. S [2].

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

By developing this with the developing device 10 carrying magenta toner TI4 as shown in FIG. 9 [7], a magenta toner image is obtained in the 3G area.

Next, after recharging (Fig. 9 [8]), the entire surface is exposed to red light obtained by the red filter FR, but at this time no potential pattern is generated and development with cyan toner T is not performed. . Thus, when the yellow toner image and the magenta toner image are transferred and fixed onto the transfer material, a red image in which yellow and magenta are visually superimposed is observed on the transfer material.

The above explanation is based on the case where the original is a red image, but the three-color separation method and the subtractive color mixture method can also be used when the original is a white, green, blue, yellow, magenta, cyan, or black image. Color reproduction is performed by combining primary color toners. FIG. 10 is a diagram illustrating the process of color reproduction when such originals of each color are used. In FIG. 10, 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 symbol r C:H J represents the formation of a primary latent image, the symbol "○" represents the formation of a secondary latent image, and the symbol "○" represents the process at 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 latent image formation is not performed.

FIG. 11 is a cross-sectional view of a main part of a multicolor image forming apparatus for copying multicolor images using the photoconductor 40. 4
0, the film-like photoreceptor 12 is placed on a metal drum 11.
4 is a positive direct current primary charger, 5 is a negative direct current corona discharge scorotron charger having a slit for image exposure L, and 6 is a blue filter F.
．． and blue light L. 7 is a developing device containing yellow toner. 8 is a Scoro 1/Ron charger for negative DC corona discharge, S is a light source that has a green filter FG and irradiates green light LG, 10 is a developing device containing magenta toner, and 14 is for negative DC corona discharge. Scorotron charger 18 has a red filter FR, red light L
．． 19 is a developing device containing cyan toner. P is a transfer material, 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 electrode to white light or infrared light from the back side of the electrode, 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 by the charger 5, and at the same time, the image exposure L from the three primary color originals of blue, green, and red is scanned and exposed. do. On the photoreceptor 40, 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. Next, the entire surface is exposed L. by a white or blue light source 6 equipped with a blue filter F. An electrostatic charge image corresponding to the primary latent image is formed in the region 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 by a negative scorotron charger 8, the entire surface is exposed LG by a white or green light source 9 equipped with a green filter FG, and a magenta developer 10 Develop magenta.

Next, after erasing the remaining electrostatic image by the negative scorotron charger 14, the entire surface is exposed to light by a white or red light source 18 equipped with a red filter FR, and the cyan developer 1
Develop cyan in Step 9.

In this way, a multicolor toner image corresponding to the original is formed on the photoreceptor, and is 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 transferred photoconductor 40 is neutralized by a static eliminator 53, residual toner is cleaned by a cleaning blade 54, and the photoconductor 40 is prepared for the next image formation.

In the above description, an n-type semiconductor is used as the photoreceptor, but a photoreceptor using a p-type semiconductor such as selenium may also be used. In this case, the sign of the charge is simply reversed. There is basically no difference.

Of course, it can be used as both an n-type and a p-type, so either one can be used.

As is clear from the above description, the angry light body according to the present invention;
This is a photoreceptor with an insulating composite filter provided on the photoreceptor layer, and the method for forming an image using the photoreceptor is to form a primary latent image with only one image exposure, and then to The entire surface is exposed using the color separation method, a secondary latent image is formed for each color of the color separation filter that forms the grooves of the composite filter, and the process of developing with toner of the corresponding color and recharging is repeated. This allows a multicolor image to be obtained.

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 direct current corona discharge of opposite polarity to the remaining electrostatic image by a scorotron charger. It should be noted that "charging Σ'" as used in the above method includes cases where an unobtainable surface potential becomes O when charging is performed, or cases where the surface charge disappears.

The present invention also provides primary charging, secondary charging with a polarity substantially opposite to the primary charging, recharging for smoothing the potential pattern after {'& exposure, full-surface exposure with specific light 22, and specific It can also be applied to an image forming method in which development with color toners is manipulated.

The above development is preferably carried out by a magnetic brush method, and the developer is a so-called l-component developer using non-magnetic toner or magnetic toner, or a so-called two-component developer containing a mixture of toner and a magnetic carrier such as iron powder. Both can be used. For development, a method of directly 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 that does not allow the developer layer to come into contact with the surface of the photoreceptor is used. A developing method in which the gap between the developing sleeve and the photoconductor 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-5
Publication No. 5-18656, Japanese Patent Application No. 58-57446, Japanese Patent Application No. 58-238295, Japanese Patent Application No. 1983
It is particularly preferable to use the method described in each specification of No. 238296. This method uses a one-component developer consisting only of non-magnetic toner, which allows you to freely select the coloring, and a two-component developer containing non-magnetic toner.
Preferably, an alternating electric field is formed in the development area and development is performed without bringing the electrostatic image support and the developer layer into contact. 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 resin with magnetic material dispersed in it. , various known carriers can be used.

In addition, the patent application filed earlier by the applicant in 1982-24
The developing methods described in the specifications of No. 9669 and No. 58-240066 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 daylight, green, and red. 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) and the part without a filter (which may be transparent resin or the atmosphere). A photoreceptor having layers may also be used. The portion without this filter is regarded as a transparent filter, and is included in the above-mentioned "multiple types of filters".

fart. EXAMPLES Hereinafter, the present invention will be specifically explained with reference to Examples, but the embodiments of the present invention are not limited thereby.

A 2.3-μm-thick conductive layer made of Ketjen black (conductive carbon) and vinyl chloride-maleic acid copolymer, and a 21.5-μm-thick charge transport layer (CTL) made of the following compound 1. ) and charge-generating N (CGL) with a thickness of 1 μm made of the following compound 2 were laminated in sequence on a photoconductor, using the apparatus shown in FIG. ) and the spectral characteristics shown in FIG. 12, a color separation filter having a thickness of 2 μm was provided on a polyester film having a thickness of 15 μm, and the two were bonded together to produce an image carrier. C2! {6 iF C For bonding the thin film having the above filter layer and the photoreceptor,
In this example, a double-sided tape was used in which an adhesive having the following components was applied to an insulating base material having a thickness of 3 μm.

2-Ethylhexyl acrylate 78 parts by weight Methyl acrylate 20 Maleic anhydride
2 Hexamethylene diamine
A thin film was attached to a film-like photoreceptor using a roll-shaped double-sided tape (width the same as the photoreceptor) coated with 0.5 equivalent of the above-mentioned adhesive.

Next, this image carrier was incorporated into an image forming apparatus shown in FIG. 13, and an image was formed. In FIG. 13, the image carrier 40 was charged by the primary charger 4 so that the surface potential of the image carrier 40 was -1800V.

In this case, the peripheral speed of the image carrier was 60 mm/sec.

Next, while performing image exposure, the image carrier 40 was charged with a secondary charger 5 consisting of a scorotron corona discharger having an alternating current component so that the surface potential of the image carrier 40 was +40V. 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 D is +40V and the black area of the original D is -290V.
An electrostatic image with a contrast of approximately 330 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, magnetite was contained in the resin in a proportion of 70 wt%, the average particle size was 25 μm, and the magnetization was 30 emu/
a carrier having a g resistivity of 10'4 Ω-cm or more; a positive charging nonmagnetic toner T having an average particle diameter of 10 μm, which is made by adding 10 parts by weight of a benzidine derivative as a yellow pigment and other charge control agents to a styrene-acrylic resin; Developer D consisting of
．． was used under conditions such that the ratio of toner to developer was 20-t%. In addition, the same developing device 7 clearly shown in FIG.
The outer diameter of the developing sleeve 47 is 30 mm, the rotation speed in the direction of arrow B is 100 rpm, the magnetic flux density of the N and S magnetic poles of the magnet body 43 rotating in the direction of arrow A is 900 Gauss, and the rotation speed is 1000 rpm. The thickness of the developer layer is 0.3
va, the gap between the developing sleeve 47 and the image carrier 40 is 0.
5 mm, and a non-contact development condition was applied in which a superimposed voltage of -80 V DC voltage and 2.0 kHz, IOOOV AC voltage (the amplitude of the normal wave is 4 cm x 1000 V) was applied to the developing sleeve 47. .

Incidentally, while the electrostatic image was being developed by the developing device 7, the other similarly configured developing devices 10 and 19 shown in FIG. 13 were kept in a non-developing state. It connects the developing sleeve with a power supply of 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 of the developer in the developing device 7 is changed to a toner containing polythane dust phosphoric acid as a magenta pigment instead of a yellow pigment. A developer was used whose composition 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 image carrier 40 developed by the developer 7 was recharged to a surface potential of +100 cm by a scorotron corona charger, it was uniformly exposed to light through a green filter.

The potential of the electrostatic image obtained by this is +90V for the white background.
In contrast, the voltage on the black background was -220 V. This electrostatic image is transferred to the developing sleeve with a DC component of +15V and an AC component of 2.0K.
Developing was carried out in the developing device 10 under the same conditions as in the developing device 7 except that a voltage of 1{z, 1ooo■ was applied.

Similarly, the scorotron charger increases the surface potential to +130
After being recharged to V, uniform exposure was performed through a red filter. As a result, an electrostatic image of +110V for the white background and -180V for the black background is formed, and this electrostatic image is applied to the developing sleeve with a DC component of +70V, an AC component of 2.0kllz,
Developing was carried out in the developing device 19 under the same conditions as in the developing device 7 except that a voltage of 1000 V 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 to a copy P using a transfer device 51, separated using a separator 52, and fixed using a heat roller fixing device 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 or infrared light, residual toner is removed from the surface by the cleaning blade 54 of the cleaning device 22, and the color image is formed. At the point when the surface has passed through the cleaning device 22, one cycle of color image recording is completely completed.

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

(The following is a blank space) Table 1 As the image carrier 40, on a Ni substrate, a thickness of 60 μm that exhibits the spectral characteristics as shown in FIG. 15 A 3 2 3 e
It has three optical layers and the structure shown in Figure 4 (Japanese), and the first
A 2 μm thick color separation filter having the spectral characteristics shown in FIG. 2 was bonded to a 15 μm thick polyester film. The adhesive used was the same as in Example 1. Image formation similar to Example 1 was performed under the conditions shown in Table 2 below.

The drum diameter of the photoreceptor used was 200 mm, and the rotational linear speed was 135 mm/sec.

In this example, a thin film and a sheet-like photoreceptor were attached, and sufficient adhesive strength was obtained.

(Leaving space below) Table 2: Release properties Main Examples 1 and 2 are examples in which a thin film having a filter layer is attached to a sheet-like phosphor, but in this Example 3, the release property is applied to the thin film side A laminated web was prepared by printing a composite filter layer in the same manner as described above on the treated cloth, which had been treated to stop the mold release treatment on the support side so that the adhesive remained on the support side during peeling.

Using the apparatus shown in FIG. 8, the thin film having the filter layer was peeled off from the laminated web, cut into an appropriate size, and then sent to a photoreceptor drum. In this example, the adhesive was heated by an external heating device to melt the adhesive and make it sticky. There, the thin film with the cut filter layer was moved and deposited on the irradiator drum. The support from which the thin film had peeled off and the adhesive layer was attached was wound up to a support winding section.

The obtained photoreceptor has the structure shown in FIG. 1(C). As shown in Figure 1 (C), there is an adhesive method in which a filter layer is installed on the side of the photoconductor, and a thin film with a filter layer is installed in Figure 1 (C).
) (FIG. 1(A): separating the photoconductor 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,
It is desirable to coat the irradiation layer in advance.

Comparative Example The adhesive used in Examples 1 to 3 is non-water soluble, but in this comparative example, a water soluble adhesive (e.g. casein) was used to adhere the filter and image formation was performed in the same manner. .

As a result, the images produced by the phosphor produced using the adhesive according to the example were good, but when produced using a water-soluble type adhesive, image blurring occurred depending on the type of adhesive. There were a variety of cases, including cases where the problem occurred, cases where the image contrast did not appear, and cases where toner did not adhere at all and no image was formed. None of the photoreceptors in which an adhesive layer of a water-soluble type adhesive was interposed could produce images superior to those obtained by the photoreceptor using the adhesive according to the example.

With water-soluble adhesives, since the adhesive itself has low resistance, the charges 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 transferred.

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

[Brief explanation of the drawing]

The drawings are for explaining the present invention by way of example. Figures 2 and 2 are partial cross-sectional views of a thin film provided on a support, Figures 3 (A) and (E3) are cross-sectional views of a laminate having a composite filter, and Figures 4 (A) and ( Figure 5) (A), (B) and (C) are partial cross-sectional views of the main stages showing other bonding methods; Figure 6; is a cross-sectional view of the double-sided adhesive tape, Figures 7 and 8 are schematic diagrams showing the process of adhering the filter layer to the photoreceptor, and Figure 9 [1], [2], [3], [4], [ 5], [6
], [7] and [8] are diagrams explaining the image formation process from a red original, Figure 10 is a diagram explaining the image formation process from various colored originals, and Figures 11 and 13 are multicolor images. FIG. 12 is a spectral diagram showing the spectral characteristics of the filter, FIG. 14 is a sectional view of the developing device, and FIG. 15 is a graph showing the photosensitivity of the light trapping layer. In addition, in the reference numerals shown in the drawings, 1-.
a-...1--1...- Filter layer 3b...-
-・・One thin film 3c−・One−−−・One−−−One protective layer 11・−・−・
・-・・1 Conductive member 12 ・・・−・−11-11 Illusion layer 16a, I 6 b・−−−−−−−
C<Rigi 2 5 ----1・11-11・1 base material 2
6..1.1..1 Double-sided adhesive material (tape). Agent Patent Attorney Hiroshi Aisaka Company 1 Figure 12 C & Length (nm) Figure 13 'J-Length (nm)

Claims (1)

[Claims] 1. A photoreceptor in which a layer having a color separation function is attached to the upper side and/or the lower side of the photosensitive layer via a double-sided adhesive material with adhesive layers provided on both sides of the base material.