JPH0812151A - Printing object press-fitting/transferring roller and covering body for roller and printer using these and cleaning device for this - Google Patents

Abstract

PURPOSE:To provide a printing object press-fitting/transferring roller in a printer by which ink sticking pollution is hardly caused and which can be easily cleaned and has high durability. CONSTITUTION:In a printing object press-fitting/transferring roller, a composite covering coating film 14 composed of a porous ceramics flame spraying layer 12 and a low surface energetic resin layer 13 formed on a surface and in a hole part of the ceramics flame spraying layer, is formed on a surface of a metallic roller base material 10 to which degreasing and blast processing are applied. The composite covering coating film is formed on a flexible metallic plate material, and can be provided in the shape of a covering body windable round a roller, and an inorganic particulate layer composed of ceramics powder, glass beads or the like is used instead of the ceramics flame spraying layer, and a composite covering coating film composed of this and a low surface energetic resin layer is formed on a base material such as a synthetic resin film or waterproof processing paper, and can be provided in the shape of a simpler covering body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved roller for press-contacting and transferring an object to be printed in various printing apparatuses, and more particularly to an improved roller such as a guide roller in various rotary printing machines and an impression cylinder in offset printing machines. It is about.

[0002]

2. Description of the Related Art Printing technology is used to print characters and other graphic information.
It is a technique of mass-copying a hard copy (printed matter) on which the same quality image is formed on the surface of a printing medium such as paper. In such a printing technique, as is well known, as a printing apparatus used for adhering a coloring material (ink) to a printing plate and press-bonding and transferring it to the surface of a printing object to form a printed matter, Offset printing machine, letterpress printing machine, flexo printing machine, depending on the type of ink transfer from the printing plate to the printing surface (direct printing or indirect printing)
There are various types such as a gravure printing machine and a screen printing machine.

In these printing apparatuses, the difference is whether the printing plate is directly pressed onto the printing medium or an intermediate medium such as a rubber blanket to which the ink adhering to the printing plate is once transferred is pressed onto the printing medium. However, the same holds true for the general idea of transferring the ink on such printing elements (printing plates or intermediates) to the printing substrate, the printing substrate being pressed onto these printing elements and then transferred. There are many common points in the structure of the body pressure bonding and transfer system.

FIG. 6 is a diagram showing a schematic structure of a printing mechanism in an offset printing machine. In the offset printing machine, the ink is transferred from the plate cylinder 1 to the blanket cylinder (rubber blanket) 2 and then pressure-transferred onto the surface of the printing medium 4 fed between the blanket cylinder 2 and the impression cylinder 3. , An ink image (printed matter) 5 is formed.

Conventionally, as an impression cylinder of an offset printing machine,
The surface of the metal cylinder is usually finished by chrome plating, but when double-sided printing is performed with a printing machine equipped with an impression cylinder with such a structure, the printed material after the first side printing In the next step, as shown in FIG. 7, 4 is fed between the blanket cylinder 2 and the impression cylinder 3 having the same structure as described above (that is, the first surface of the printing medium on which the ink image 5 is formed is pressed. (Contacting the cylinder 3 side), the ink image 5 printed on the first surface is transferred as a transfer ink image 6 on the surface of the impression cylinder 3 and is subsequently transferred to the same surface of the printing medium 4 sent. As a result of the ink image 6 being transferred again, the printing surface is contaminated (hereinafter,
This is called "back stain". ) Was occurring. If double-sided printing is repeated, this tendency becomes worse, and uneven printing occurs.

Also in the case of single-sided printing, as shown in FIG.
As shown in FIGS. 8A and 8B, the size of the printing medium 4 to be used ranges from wide to narrow.
When printing on a narrow print target 4 as shown in (a), the blanket cylinder 2 and the impression cylinder 3 are in direct contact with each other in the width portion where the print target 4 does not exist (a strong printing pressure is applied. Therefore, the blanket cylinder 2 is dented by a thickness corresponding to the thickness of the material 4 to be printed.) A slight amount of stain ink on the plate cylinder 1 is transferred to the impression cylinder 3 through the blanket cylinder 2 and stains the impression cylinder. Becomes Next, when the wide printing body 4 passes while the impression cylinder is dirty, there is a problem that the dirt of the impression cylinder adheres to the printing object 4 and stains the printed matter.

Therefore, when the double-sided printing as described above is repeated, or when the narrow printing is changed to the wide printing, the impression cylinder 3 must be washed without fail, and the impression cylinder 3 is also required. For the cleaning of, since the ink adhered to the surface of the impression cylinder 3 is difficult to remove easily, stop the printing machine, reach for a narrow area in a very unstable posture, and add an organic solvent. In addition, a very wasteful and difficult manual work of wiping the impression cylinder 3 while manually rotating it one by one using a waste cloth was forced.

In order to solve such a problem, Japanese Patent Application Laid-Open No. 62-94392 proposes an impression cylinder in which the surface of a metal cylinder is coated with a specific silicone resin.

However, when the surface of the metal cylinder is simply coated with the silicone resin as described above, the resulting silicone resin film has a low hardness, so that the performance is significantly deteriorated due to scratches and abrasions, and the impression cylinder of the offset printing machine is affected. It has been found that it is not practical to use it as a part that is difficult to replace. In addition, when such a silicone-based resin film is formed directly on the surface of the metal cylinder, the surface texture becomes extremely smooth and flat. However, if it has such a surface shape, the material to be printed has such a surface shape. It was found that since the silicone-based resin completely comes into close contact with No. 4, the transfer of the ink from the substrate to be printed 4 is considerably large even though the silicone-based resin exhibits non-adhesive surface physical properties with low surface energy.

FIG. 9 is a drawing showing a schematic structure of a printing and transferring mechanism for a printing medium in another offset printing machine. This example is a rotary type in which a continuous paper wound in a roll shape is used as the printing medium 4, and ink is transferred from the plate cylinder 1 to the blanket cylinder 2 in the same manner as described above, The ink image 5 is formed by pressure transfer onto the surface of the printing medium 4 fed between the impression cylinders 3, and the ink image 5 is formed.
The printing medium 4 formed on the surface of the sheet passes through the inside of the apparatus while being transferred and deflected by the plurality of guide rollers 7.

In a rotary press that continuously prints on an object to be printed, such as a paper or a film wound in a roll shape in this manner, a transport system for the object to be printed is provided with many guide rollers. The transfer system using such guide rollers is not limited to the above-mentioned offset rotary press (newspaper rotary press, commercial offset rotary press, foam rotary press), but also gravure printing machine, flexo printing machine, letterpress newspaper rotary press. And the like.

Many of the guide rollers 7 for a rotary press are made of an aluminum alloy pipe for the purpose of weight reduction. Of course, other than this, there are also known ones in which the surface of an iron pipe is plated with chrome, or those in which a carbon fiber reinforced resin or the like is used for weight reduction. Furthermore, in order to prevent slippage and ink adhesion of the printed material, knurled ones, sandpaper-like roughened tapes on the surface of these guide rollers, ceramic sprayed ones, etc. Are known. However, the knurled aluminum alloy pipe has low wear resistance, and the unevenness of the knurl disappears in a short period of time, so that slip is likely to occur. Also, in the case where a sandpaper-like rough surface tape is attached to the roller surface, the sand beads may be dropped off or the tape may be peeled off after a short period of use, and it cannot withstand long-term use. On the other hand, a ceramic spray-coated surface has very high wear resistance and has a very good effect in terms of slip resistance, but the following problems of ink adhesion become remarkable. There were drawbacks.

That is, the surface of any of the conventionally known guide rollers is made of a material having a physical property of relatively high ink adhesion.
Even if the surface is roughened, when the rotary press is operated for a long time, the ink image 5 printed on the surface of the printing medium 4 comes into contact with the guide roller 7 surface when the rotary press is operated for a long time. The same problem as in the above-described impression cylinder arises in that the transfer ink image 8 is transferred onto the upper surface of the printing body 4 and the transfer ink image 8 is reversely transferred to the surface of the printing medium 4 to be printed. For this reason, when operating the rotary press, such guide rollers must be regularly cleaned, which interrupts the printing work for the cleaning operation, causes a large cleaning load, and neglects cleaning. ,
This causes the trouble of producing defective prints.

In particular, in the case where the ceramic spray-coated surface is formed, the ink cannot be easily removed by wiping the surface because the ink enters the concave portion of the spray-coated rough surface and adheres thereto. When the cleaning is performed by using, the ink dissolved in the solvent is transferred and impregnated into the pores of the ceramic sprayed layer, so that the cleaning operation is difficult.
Further, JP-A-63-102940 proposes to wrap a covering material having a silicone resin as a surface layer and having compressibility around the surface of the intermediate cylinder in order to prevent ink stains on the intermediate cylinder of the printing machine. ing. However, as described above, the coating material having only the silicone resin coating has extremely poor wear resistance and loses the releasing effect in an extremely short period due to wear contact, so that it is not practical to apply it to members used under wear. Absent.

Further, as a member for preventing ink from adhering to the impression cylinder, the feed cylinder and the guide roller of the printing machine, Japanese Patent Publication No. 53-784.
No. 1 and Jiukai Sho 61-31740 disclose a technique relating to an ink adhesion preventing coating in which glass beads are coated on a substrate such as kraft paper, synthetic paper and resin film, and it is generally commercially available. It is practiced to attach these to the impression cylinder, the feed cylinder, and the guide roller. This technology is based on the idea of preventing ink adhesion by the point contact effect of bringing the glass beads' head surface into contact with the printing surface. The material has relatively high surface energy and weak repulsion to ink. It does not exhibit the effective ink adhesion prevention effect. In particular, the valleys (recesses) formed between the glass beads are acute-angled, so that the ink is likely to remain and solidify, and after operating for a while, ink, paper dust, etc. adhere and accumulate, contaminating subsequent paper. There is a drawback that For this reason, it is necessary to stop the machine regularly to wash and remove the attached contaminants with an organic solvent.In this case as well, it is not possible to continuously operate the long-term printing press, and the time required for removing the contaminants is reduced. It was a lot of work. Further, due to repeated use, residual contaminants such as dried and solidified ink remaining in the valleys increase and the releasing effect is lost, and it is necessary to replace with a new coating in a short period of time, which causes many problems. .

Further, in Japanese Patent Publication No. Sho 53-7841, silica gel, alumina,
A technology that adheres porous beads such as styrene gel to a sheet-shaped substrate and makes the pores of this porous material contain water to keep the bead surface constantly wet during the printing operation and impart ink repulsion It is disclosed. It is said that water can be replenished in this porous material by a method such as spraying, but if water is sprayed on the sheet surface in use, excess water will adhere to the printing paper surface, causing problems such as color density reduction. Is highly likely to occur and control is very difficult. In addition, the pores of the porous substance are impractical, and the function is lost in a short period of time, which is not practical. Furthermore, if the ink repellent effect due to water is lost, various problems will occur due to ink accumulation in the valleys formed between beads, as in the case of the sheet to which the glass beads are adhered, and a large improvement effect will be maintained. It was impossible.

Accordingly, it is an object of the present invention to provide an improved roller for press-contacting and transferring an object to be printed, or a cover for the same, which is used in various printing apparatuses. It is another object of the present invention to provide a roller for press-bonding / transferring an object to be printed or a cover for the same, which has less ink contamination and is easy to wash and has high durability. The present invention further provides back stains during double-sided printing,
An object of the present invention is to provide an impression cylinder and an intermediate cylinder for an offset printing machine in which problems such as stains on a printed material due to a change in the width of an object to be printed during single-sided printing are less likely to occur. It is another object of the present invention to provide a guide roller for a rotary press, which has good slip resistance with respect to a printed material and has less problems of stains on the printed material. A further object of the present invention is to provide a cleaning device capable of cleaning an impression cylinder, a guide roller and the like of an offset printing machine with an extremely simple structure.

[0018]

In order to achieve the above-mentioned objects, a roller for press-contacting and transferring an object to be printed according to the first aspect of the present invention comprises a degreasing and blasting-treated metal roller base material surface having a porous structure. And a low surface energy resin layer formed on the surface of the ceramics sprayed layer and in the holes of the ceramics sprayed layer.

The surface property of the pressure roller for transferring and transferring the material to be printed typically has a surface roughness Rmax of preferably 20 to 40 μm, and has smooth unevenness. Further, it is preferable that the convex portions of the irregularities are present in a uniformly dispersed manner at a ratio of about 1 per 20 μm × 20 μm square to 100 μm × 100 μm square.

In addition, a metal sprayed layer is formed between the metal roller base material or the metal plate material and the composite coating film in order to bond the composite coating film more firmly. Preferably there is.

Further, the low surface energy resin is preferably a silicone resin.

Further, such a composite coating does not have to be directly formed on the surface of the metal roller base material, but is constituted as a detachable coating body, and substantially the entire peripheral surface of the roller for pressure-bonding and transferring the object to be printed. It may be wrapped around.

That is, the second aspect of the present invention is a cover body which is detachably wound around substantially the entire circumferential surface of the roller for pressure-bonding / transferring an object to be printed, and has a fine surface on a flexible substrate. A printing material characterized in that a composite coating film comprising a hard base layer having irregularities and a low surface energy resin layer formed on the surface of the base layer without completely eliminating the irregularities is formed. It is a cover body for body pressure bonding and transfer rollers.

In the coated article of the second aspect of the present invention, the low surface energy resin layer is preferably made of a silicone resin.

Incidentally, the covering body can be roughly classified into two modes. One of them is preferably applied to a roller (high load portion) having a relatively high printing pressure, such as an impression cylinder for an offset printing machine, and is made of a metal plate material that has been degreased and blasted. On the substrate, which is a coating formed by forming a composite coating film comprising a porous ceramic sprayed layer and a low surface energy resin layer formed on the surface of the ceramic sprayed layer and in the pores (hereinafter, It is referred to as the "first embodiment cover".

The other is preferably applied to a roller (low load portion) having a relatively low contact pressure between the printing paper surface and the roller, such as a feed cylinder of a sheet-fed printing press or a guide roller for a rotary printing press. There is a composite consisting of a base layer formed by adhering a plurality of inorganic fine particles on a substrate made of a synthetic resin film or water-resistant treated paper, and a low surface energy resin layer formed on the surface of the base layer. It is a coated body formed by forming a coating film (hereinafter referred to as "the coated body of the second aspect").

In the coated body of the first aspect, the surface texture of the coated body has a surface roughness Rmax of 20 to 40 μm and smooth irregularities, and the convexities of the irregularities are 20 μm × 20 μm. Square to 100 μm x 1
It is desirable to exist at a rate of about 1 per 100 μm square, and it is further desirable that a metal sprayed layer is formed between the metal plate material and the composite coating film.

In the coated body of the second aspect, the fine particles are ceramic powder or glass beads, and the surface texture of the coated body has a surface roughness Rmax 20.
It is desirable that the thickness is about 150 μm and has smooth unevenness.

Typical examples of the roller to which the above-mentioned coated body is applied include an impression cylinder or an intermediate cylinder for an offset printing machine and a guide roller for a rotary printing machine.

The present invention is also a printing apparatus having the roller for pressure-bonding / transferring the object to be printed of the first invention. The present invention is also a printing apparatus having a roller for pressure-bonding / transferring an object to be printed, which is obtained by winding the cover of the second invention on an outer peripheral surface. The present invention further provides a pressure-bonding / transferring roller for a printing object according to the first invention, or a pressure-bonding / transferring roller for a printing object obtained by winding the covering body according to the first aspect of the second invention on an outer peripheral surface. It is also a printing apparatus in which a roller for press-bonding / transferring an object to be printed, which is arranged in a high load part and which has a cover according to the second aspect of the second invention wound around an outer peripheral surface, is arranged in a low load part. .

The present invention also comprises a roller for pressure-bonding / transferring an object to be printed according to the first invention, or a roller for press-contacting / transferring an object to be printed, which is obtained by winding the covering member according to the second invention on an outer peripheral surface. According to another aspect of the present invention, there is provided a cleaning device in a printing apparatus, comprising a dry cleaning body that can be pressed / disengaged on a roller surface of the roller for pressure-bonding / transferring an object to be printed.

The present invention is also configured as a roller for pressure-bonding / transferring an object to be printed according to the first invention, or a roller for press-bonding / transferring an object to be printed, which is obtained by winding the covering body according to the second invention on an outer peripheral surface. A cleaning device in an offset printing apparatus including an impression cylinder, comprising a cleaning body that can be pressed against a roller surface of a blanket cylinder facing the impression cylinder, and a certain period of time in a state where the cleaning body is pressed against the blanket cylinder. It is characterized in that it has a sequence control mechanism for rotating the impression cylinder in contact with the blanket cylinder and can clean the impression cylinder together with the cleaning of the blanket cylinder.

Further, the present invention relates to a roller for treating a film-like body having a surface to which an adhesive migration substance is applied, similar to a printed matter on a printing machine, which is a degreased and blasted metal roller base material surface. A composite coating film comprising a porous ceramic sprayed layer and a silicone resin layer formed on the surface of the ceramic sprayed layer and in the pores is formed.

Similarly, the present invention is a covering body which is removably wound around substantially the entire circumferential surface of a roller for treating a film-like body having a tacky transfer material applied to the surface like a printed matter on a printing press. And a composite coating film comprising, on a flexible substrate, a hard base layer having fine irregularities on the surface and a silicone resin layer formed on the surface of the base layer without completely eliminating the irregularities. Are formed.

The coating is a porous ceramic sprayed layer as a base layer on a substrate made of a metal plate material that has been degreased and blasted, and a silicone-based coating formed on the surface of the ceramic sprayed layer and in the holes. A first aspect comprising a composite coating film comprising a resin layer, and a base layer formed by depositing a plurality of inorganic fine particles on a substrate comprising a synthetic resin film or water resistant treated paper A second aspect is included in which a composite coating film including a silicone resin layer formed on the surface of the base layer is formed.

[0036]

As described above, the roller for pressure-bonding / transferring the object to be printed according to the present invention has the porous ceramic sprayed layer and the surface of the ceramic sprayed layer on the surface of the metal roller base material which has been degreased and blasted. It is formed by forming a composite coating film including a low surface energy resin layer formed in the pores. FIG. 1 is a diagram schematically showing a cross-sectional structure of one embodiment of such a roller for pressure-bonding and transferring a material to be printed according to the present invention, and FIG.
FIG. 3 is a diagram schematically showing the sectional structure of the transfer roller in an enlarged manner, and FIG. 3 is a diagram schematically showing the sectional structure in the manufacturing process of the roller for press-bonding / transferring the printed material according to the present invention. Note that the vertical and horizontal scale ratios are exaggerated in these figures.

In order to obtain the pressure-bonding / transfer roller for the printing medium of the present invention, first, as shown in FIG. 3, a ceramic sprayed layer 12 is formed on the surface of a metal roller base material 10 which is roughened by degreasing and blasting. To form. In the example shown in this figure, a metal sprayed layer 11 is formed on the surface of the metal roller base material 10, and a ceramic sprayed layer 12 is formed thereon. Ceramic sprayed layer 12 thus formed
As shown in the figure, the surface is a rough surface formed by combining short-period irregularities (pitch-wave irregularities) that form very sharp protrusions and even longer-period irregularities (waviness irregularities). Preferably, Rmax is a rough surface of about 30 to 50 μm, and the ceramic sprayed layer 12 is porous, preferably 0.1 μm to several tens of μm of fine pores.
˜20%.

Here, when a low surface energy resin such as a silicone resin is impregnated and coated from the upper portion of the ceramic sprayed layer 12 and dried and solidified, FIG.
2 and 2, the low surface energy resin layer 13 is formed on the surface of the ceramic sprayed layer and in the holes. As described above, the low surface energy resin 13 has the pitch-wavy irregularities in the ceramic sprayed layer 12 and is porous, so that the ceramic sprayed layer 12 is anchored by entering into these portions.
Adhesion with and good composite coating, ceramic sprayed layer 1
2 and the low surface energy resin layer 13 form a composite coating film 1
Make up 4.

Further, the low surface energy resin 13 covers substantially the entire surface of the ceramic sprayed layer 12, but adheres thickly to the pitch wavy concave portions and thinly adheres to the pitch wavy convex portions. Therefore, the surface texture is smoother than that in the case where only the ceramic sprayed layer 12 is formed, but the unevenness due to the ceramic sprayed layer 12 is not completely buried, and the waviness-like unevenness is generally maintained. A rough surface having smooth unevenness can be formed. The final surface roughness Rmax is typically 20.
It is desirable to set the thickness to about 40 μm. Further, it is desirable that the final convex portions in the smooth unevenness (the convex portions of the waviness) are uniformly dispersed at a rate of about 1 per 30 μm × 30 μm square to 60 μm × 60 μm square. The convex portion referred to here is measured by two-dimensionally scanning the surface of the object to be measured over a length of 20 mm and a width of 20 mm, and a height of 70% or more of the height of the highest convex portion in this measurement region is measured. It refers to the convex portion that it has.

Therefore, when the roller for pressure-bonding / transferring the object to be printed according to the present invention comes into contact with the object to be printed, it does not contact the entire surface of the roller but only the smooth protrusion as described above. In addition, since there is a low surface energy resin on the surface, the transfer of ink from the printing medium does not occur easily, and the transferred ink also has a smooth surface due to the low surface energy resin. Since it has a profile of, it can be easily removed by simply touching it with a dry cloth material.

Further, as described above, the low surface energy resin layer 13 is composited with the ceramic sprayed layer 12 and applied to the surface, so that even if it is used for an extremely long period of time, it is entirely worn and peeled. It does not occur, and wear only occurs in a very small portion such as the convex portion of the wavy unevenness. Therefore, the low surface energy of the roll surface is maintained for a long period of time, and the deterioration of the characteristics is unlikely to occur. Note that this waviness-like unevenness is expressed as “waviness” for the purpose of comparison with finer pitch unevenness, but it is visually unnoticeable, and therefore the resin layer 13 on the surface of the convex portion is not recognized. However, even if the ceramic sprayed layer 12 is exposed due to abrasion and ink adhesion or reverse transfer occurs at this portion, there is no problem in print quality.

In the present invention, not only is the composite coating film formed directly on the surface of the metallic roller base material as described above, but, for example, as shown in FIG.
The roller body 20 is provided with a cover 21 that is removably wound, and a metal spray layer 23 and a ceramic spray layer 23 similar to those described above are provided on a metal plate material 22 as a base material of the cover 21. And low surface energy resin layer 2
It is also possible to form a composite coating film 25 composed of 4 and in this case, the same excellent action and effect as described above can be obtained, and even if some trouble occurs on the surface, the roller main body Since only the covering 21 can be replaced without replacing 20, the cost is advantageous. In addition, in the aspect in which the cover body 21 is formed in this manner, considering that bending stress is applied when the cover body 21 is mounted on the roller body 21, the roller body 2 of the composite coating film 25 is formed.
It is desirable to form the metal sprayed layer 23 as much as possible in order to improve the adhesion to zero.

Further, in the case of the covering body, a mode different from that described above may be more preferable depending on the kind of the roller to be applied. That is, the roller to which the coating body of the first aspect of the second invention as described above is applied, or the roller of the first invention has a very high ink adhesion preventing effect and a high durability in actual use. , Practically has great value. However, when it is applied to an impression cylinder, an intermediate cylinder, a guide roller, etc. of an existing printing machine, the work is complicated and the cost becomes expensive because it requires replacement of the roller, modification of the plate attachment / detachment mechanism, etc. It also has sides. Further, in the case of the cover of the first aspect of the second aspect of the present invention, a metal plate material is used as the base material, but the metal plate material has vertical and horizontal dimensions depending on the shape of the roller to be mounted, hole processing for mounting, bending. It is necessary to perform ceramics spraying and low surface energy resin coating after previously performing processing and the like, which inevitably requires batch processing with a cut plate, resulting in high cost. As a roller to which such a cover is applied, there are many low-load rollers that do not apply printing pressure.

From such a point of view, as a covering material for a roller whose load such as printing pressure and friction is low, for example, as shown in FIG. And a plurality of inorganic fine particles such as ceramic powder and glass beads are adhered to form a hard base layer in place of the ceramic sprayed layer 23. The inorganic fine particle layer 33 and the low surface energy resin layer 34 Second formed by forming a composite coating film 35
The embodiment of Reference numeral 36 in the figure is an adhesive layer for attaching the inorganic fine particles to the base material 32.

The coated body of the second aspect is inferior to the coated body of the first aspect in terms of durability, but it can be easily cut into an arbitrary size using scissors, a cutter, etc. This is advantageous in terms of workability such that bending work is not particularly required and also in terms of cost.

As described above, the cover of the second aspect is particularly advantageous as a cover for a low load roller. There is another point to be noted. That is, in a conventional printing apparatus using, for example, a blasted chrome-plated roller or the like in a high load portion (for example, a chrome-plated roller as an impression cylinder of an offset printing machine),
When the printing apparatus is in operation, the roller is significantly contaminated, and it is necessary to frequently stop the operation to clean the roller by hand. Although not, in the case of a printing apparatus using a roller according to the first invention of the present application or a roller formed by winding the covering body according to the first aspect of the second invention of the present application as a high load portion, the following low load portion is used. If the roller is a general iron roller plated with chrome or a conventional coating such as a glass bead coating is adhered to these,
Since the frequency of contamination of the high-load roller is significantly reduced, the contamination of the low-load roller becomes a problem, and the operation must be stopped in order to clean the low-load roller or replace the adhered cover. There is a situation in which it is necessary to press-bond the object to be printed according to the first invention of the present application.
In a printing apparatus having a configuration in which a roller for transporting or a roller having the coating body according to the first aspect of the second invention of the present application wound therein is provided in a high load portion, the roller of a low load portion is wrapped with the coating body of the second aspect. That is, it is possible to provide a printing device with extremely excellent operability by mounting it.

As described above, the coated body of the second invention is as follows.
On a flexible substrate, a composite coating film comprising a hard base layer having fine irregularities on the surface and a low surface energy resin layer formed on the surface of the base layer without completely eliminating the irregularities is provided. What is formed is widely included.

Further, as described above, since the ink for transferring and adhering to the object to be printed according to the present invention is very easy to remove the transferred and adhered ink, the cleaning device thereof can press the surface of these rollers. It only needs to be equipped with a clean body such as felt or cloth, and it can be made extremely compact, and it can be fully cleaned automatically by incorporating it in the printing device. When the transfer roller is an impression cylinder, the roller surface of the blanket cylinder facing the impression cylinder is provided with a cleaning body that can be pressed, and the pressing body is pressed for a certain period of time in a state where the cleaning body is pressed against the blanket cylinder. As long as it is rotated by contact with the blanket cylinder, even if the impression cylinder is not directly equipped with a cleaning device, ink stains on the impression cylinder are transferred to the blanket cylinder side, and the impression cylinder is cleaned together with the cleaning of the blanket cylinder. Because it can perform Becomes more effective Naruue.

Hereinafter, the present invention will be described in more detail based on the embodiments. As the metallic roller base material for the roller for pressure-bonding / transferring the object to be printed according to the first aspect of the present invention, a material such as a pipe made of cast iron, stainless steel, an aluminum alloy, a roll made of a cylinder or a plate material, etc. is appropriately used according to its application To be selected. For example, when the roller is an impression cylinder of an offset printing machine, a cylinder of FCD (ductile cast iron) or the like is preferable, and when the roller is a guide roller of a rotary press, a pipe of aluminum alloy, iron or the like is preferable. Of course, it is not limited to these.

Such a metallic roller base material must first be cut or polished to have a predetermined diameter accuracy. That is, the roller for pressure-bonding / transferring the printed material according to the present invention cannot perform such cutting and polishing as a final finish.

Then, in order to improve the adhesion with the ceramic sprayed layer formed on the upper portion thereof, the surface of the metal roller base material is subjected to degreasing / blasting treatment by a known method to roughen the surface.

Next, if necessary, a metal or metal alloy such as Al, Ni, Cr or the like, preferably a Ni-Cr or the like sprayed layer is formed on this metal roller base material by plasma spraying, arc spraying, gas spraying or the like. It is formed by the method of. This metal sprayed layer is for further enhancing the adhesion between the surface of the metal roller base material and the ceramics sprayed layer, and is particularly suitable for a roller to which a high load is applied during use, such as an impression cylinder. It is highly desirable to form such a metal sprayed layer, but it can be omitted in the case of a roller such as a guide roller which is relatively lightly loaded in consideration of economical efficiency. The thickness of the metal sprayed layer may be about 30 to 70 μm in average film thickness. If it is less than 30 μm, the effect of improving the adhesiveness due to the formation of the metal sprayed layer may not be obtained, while if it exceeds 70 μm, no further effect can be expected and it is economically disadvantageous.

Then, a ceramic sprayed layer is formed on the surface of the metal roller base material or the surface of the metal sprayed layer by using a known ceramics spraying method such as a plasma jet spraying method. The ceramic _{material, Al 2 O 3, TiO 2} , Al 2 O 3 -TiO 2, C
_{r 2 O 3, ZrO 2,} WC, WC-Co, Cr 3 C 2,
Examples thereof include, but are not limited to, TiC and the like or a mixture thereof, and a composite film in which ceramics and a metal are simultaneously sprayed to have conductivity, cermets and the like. The ceramic material is selected such that the adhesion strength with the metal roller base material or the sprayed metal, abrasion resistance, and the ceramic sprayed layer obtained have fine pores (continuous pores) of several μm to several tens of μm and a porosity of 5 to 5. It may be carried out in consideration of economical efficiency, such as having a surface roughness of 20% and a surface roughness Rmax of about 30 to 50 μm. In general,
White Alumina (W-Al ₂ O ₃₎ and gray alumina _{(G-Al 2 O 3)} (Al 2 O 3 -TiO 2), chromia (Cr ₂ O ₃₎ such as is desirable.

The ceramic sprayed layer is desired to have fine pores (continuous pores) of several μm to several tens of μm with a porosity of 5 to 20% because the ceramic sprayed layer has a low surface energy resin described later. This is because the layers can be stably formed into a composite, and if the porosity is less than 5%, the surface-active resin may not sufficiently enter the inside of the ceramic sprayed layer and the peelability may be increased, while the porosity is 20%. This is because the strength of the ceramic sprayed layer, which is the skeletal structure of the composite coating, may be reduced if the content exceeds the range. Further, it is desired that the surface roughness thereof has Rmax of about 30 to 50 μm so that when the low surface energy resin as described later is deposited on the surface of the ceramic sprayed layer, the body surface energy resin can be stabilized. This is because it is a range in which it is likely to adhere and finally form smooth irregularities of a necessary and sufficient size.

Further, the thickness of the ceramic sprayed layer is 30 to 200 μm in average film thickness, more preferably 40.
It is desired that the thickness is about 80 μm. That is, if the average film thickness is less than 30 μm, it may not be possible to obtain a sprayed layer which is uniform and has sufficient properties such as adhesion, strength and abrasion resistance, while the average film thickness exceeds 200 μm. It is disadvantageous in terms of cost. Further, in a mode in which high diameter accuracy is required as in the case where the roll is an impression cylinder, the film thickness is preferably 150 μm or less. That is, in the case of an impression cylinder, the final finishing diameter is D
This is because it is necessary to keep the cylindricity at 0.02 mm or less and the cylindricity at 0.020 or less.

The surface roughness of the ceramic sprayed layer is
As described above, it is generally desired that Rmax is about 30 to 50 μm, but the optimum surface roughness required as the final product differs depending on the type of roller, and for example, a machine for printing a thin film such as a gravure printing machine. The guide roller and the like in FIG. 1 are desired to have a final surface roughness of about 5 to 20 μm, which is finer than a typical Rmax of about 20 to 40 μm, so that it is necessary to obtain such a final roughness. Accordingly, it is also possible to carry out light surface polishing after ceramic spraying.

When the ceramic sprayed layer is formed in this manner, a low surface energy resin is impregnated and coated from the upper portion by a method such as spraying, dipping, brush coating, roller coating, etc., and dried and solidified at a predetermined temperature. Then, a low surface energy resin layer is formed on the surface of the ceramic sprayed layer and in the holes. The low surface energy resin is not particularly limited as long as it has low wettability with respect to the ink used and can form a stable film, preferably a high hardness film, against a chemical agent used in the ink composition or the like. However, usually, a silicone resin and a fluorine atom-containing resin are desirable, and a silicone resin is desirable in terms of hardness, workability, chemical stability and the like.

The silicone-based resin is a skeleton mainly composed mainly of a methyl group and / or a phenyl group, and more preferably a methyl group, which is polymerized and made into a three-dimensional structure after application and has a Si—O—Si bond and an organic group. Any material having a structure and capable of forming a stable cured film may be used. As the number of methyl groups as side chains increases, the wettability to ink becomes lower, but from the aspect of improving the hardness, it is possible to increase the content ratio of the crosslinked structure derived from a functional group such as a phenyl group or a vinyl group. desired.

The form at the time of construction is not particularly limited. For example, a liquid form of an oligomer, a monomer or the like, or a solution form obtained by dissolving a resin form in an appropriate solvent, such as a silicone varnish. , Commercially available various known compositions classified into silicone rubber, etc. can be appropriately selected and used. For example, a composition commercially available as a varnish type silicone release agent or a composition similar thereto Many of the compositions are preferable in terms of workability and the resulting coating properties. As the silicone release agent, for example, one having a silicone polymer or copolymer having a structure represented by the general formula (I) as a main component is commercially available.

[0060]

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(In the formula, each R independently represents a hydroxyl group, alkyl, aryl, alkenyl, halogen-substituted alkyl, halogen-substituted aryl, halogen-substituted alkenyl, preferably methyl group, and n is 1 to 30000.) However, of course, the silicone resin composition used is not limited to such a silicone release agent.

If desired, a filler such as silica fine particles may be added to the silicone resin composition to increase the hardness of the coating film. Also, the particle size must be such that it can sufficiently penetrate into the recess.

As the fluorine atom-containing resin, a thermoplastic fluorine atom-containing resin such as polychlorotrifluoroethylene, polyvinylidene fluoride, polyvinyl fluoride, etc. is used, and the resin is suspended or swollen in an appropriate solvent and applied at a melting temperature. It is also possible to use a dispersion processing method such as heating to form a film above, but in order to more reliably form a film on the surface of the ceramic sprayed layer and in the pores, a small amount of hydroxyl group in the molecular chain, It is preferable to use a thermosetting fluorine atom-containing resin that has a functional group such as a carboxylic acid group and can be applied in a liquid state, and that can be crosslinked and cured at room temperature or by heating, for example, fluoroethylene and acrylic acid, and methacrylic acid. And the like.

As described above, the thickness of the low surface energy resin layer formed on the surface of the ceramic sprayed layer is thick on the pitch wavy concave portions of the ceramic sprayed layer and thin on the pitch wavy convex portions of the ceramic sprayed layer. It is difficult to define it as a film thickness. However, it is desirable to adhere the ceramic sprayed layer in a thickness of about 0.5 to 20 μm throughout so that the surface of the sprayed layer is substantially entirely covered and the waviness of the ceramic sprayed layer is maintained.

The roller for pressure-bonding / transferring the object to be printed of the present invention obtained in this manner has a final surface having unevenness, and its surface roughness Rmax is typical.
Is preferably about 20 to 40 μm, and the projections of smooth unevenness on the final surface are, for example, 20
About 1 μm per μm × 20 μm square to 100 μm × 100 μm square, more preferably 30 μm × 30 μm square
It is desirable that the particles are uniformly dispersed at a rate of about 1 per 60 μm × 60 μm square. The entire surface thereof is formed by a dense low surface energy resin layer held on the ceramic sprayed layer as a composite coating film, and has low wettability to the ink used.

Therefore, the roller of the present invention can be suitably used as various rollers arranged in a pressure-bonding / transferring system for a printing medium in various printing machines. Specifically, for example, an impression cylinder in an offset printing machine, or Offset press (newspaper press, commercial offset press, foam press),
It can be suitably used as a guide roller in various rotary presses such as a gravure printing machine, a flexographic printing machine and a letterpress newspaper press.

Next, the cover of the second invention will be described in detail. The cover of the second invention is a hard base layer having fine irregularities on the surface of a flexible substrate and a low surface energy property formed on the surface of the base layer without completely eliminating the irregularities. A composite coating film comprising a resin layer is formed.

As the flexible substrate, when relatively high pressure resistance and durability are emphasized, it is preferable to use a metal plate material such as an aluminum alloy plate or a stainless steel plate for easy workability and price. When giving priority, it has a small amount of shrinkage due to absorption of water, solvent, etc., small expansion and contraction due to heat, a certain amount of flexibility that makes good contact with the roller surface, and a certain amount of strength to withstand tearing and tension. However, from the viewpoint that it is easy to cut with a cutter knife, scissors, etc., it is exemplified to use a synthetic resin film or water-resistant paper, but of course the invention is not limited to these. The synthetic resin film may be an olefin film such as polyethylene or polypropylene, a polyurethane film, a polyester film, a polyvinyl chloride or polyvinylidene chloride film, a polyamide film, or the like, and a water-resistant treated paper may be a resin-impregnated paper. , Water resistant treated kraft paper, or other water resistant non-woven paper, but of course not limited to these.

In the case of a metal plate material, its thickness depends on the type of plate material, the type of roller, etc., and is not particularly limited.
For example, one having a thickness of about 0.1 to 0.5 mm can be used.

As the hard base layer having fine irregularities on the surface formed on the flexible substrate, for example, the above-mentioned ceramic sprayed layer or a coating layer formed by a plurality of inorganic fine particles is used. In addition, as the low surface energy resin layer formed on the surface of the base layer without completely eliminating the unevenness, the above-mentioned silicone resin or the like is used.

Here, when a metal plate material is used as the flexible substrate and a ceramics sprayed layer is used as the hard base layer (first embodiment), the roller of the first aspect of the invention and its construction are applied. The metal roller base material is replaced with a metal plate material, and the manufacturing method, manufacturing conditions, material and characteristic values of each layer, and the like are substantially the same, and thus detailed description thereof will be omitted. If only the manufacturing method is outlined, first, a metal plate material is subjected to degreasing and blasting by a known method to roughen the surface, and then, if necessary, this metal roller base material. After forming a metal or metal alloy sprayed layer on it, a well-known ceramics spraying method is used to form a ceramics sprayed layer, which is further impregnated and coated with a low surface energy resin from above and dried at a predetermined temperature. It is solidified to form a low surface energy resin layer on the surface of the ceramic sprayed layer and in the pores to form a composite coating film layer.

Next, the case of forming an inorganic fine particle layer as the hard base layer will be described. As the inorganic fine particles to be used, various ceramic powders, glass beads, hard metal particles and the like are used, and preferably various ceramic powders and glass beads. The size of these fine particles is not particularly limited, but the average particle size is 30 to 2
It is preferably about 00 μm and has a uniform particle size with a narrow particle size distribution, and its shape is preferably spherical or close to spherical from the viewpoint of not damaging the printing paper and the printing surface. These fine particles may be porous or substantially non-porous.
When it is porous, the adhesion of the low surface energy resin described below is good, but on the other hand, it is often weak in strength and expensive in price. On the contrary, when the resin is non-porous, the adhesion of the low surface energy resin is lowered, but it is advantageous in terms of strength and price. Therefore, it may be appropriately selected whether it is porous or non-porous depending on the usage conditions of the roller on which the coating is applied.

An adhesive is generally used to attach such inorganic fine particles to a flexible substrate, particularly a synthetic resin film or a water-resistant treated paper. The adhesive used has sufficient water resistance and solvent resistance, and has good adhesion or wettability with the base material and the inorganic fine particles used and the low surface energy resin applied to the upper part. Select and use the appropriate one. Although not particularly limited, for example, acrylic adhesive, epoxy adhesive, chloroprene adhesive, cyanoacrylate adhesive, urethane adhesive, SBR adhesive, butyl rubber adhesive, SBS / SIS adhesive Adhesives and the like can be used. When the base material is a thermoplastic synthetic resin film, a mode in which the inorganic fine particles are directly attached by thermal welding (partial melting of the synthetic resin film) is also conceivable.

When such inorganic fine particles are adhered to the upper part of the substrate, the head of the inorganic fine particles is exposed so that the surface roughness after the adhesion becomes an appropriate value, for example, Rmax 30 to 150 μm. Need to be attached. That is, if the inorganic fine particles are completely buried in the adhesive layer or the like, the function as a cover body that imparts a rough surface to the roller cannot be achieved. Further, the inorganic fine particles deposited on the substrate may be in a state of being laminated in two layers or more as long as they are uniformly attached to the whole, but only one layer is formed as shown in FIG. This is more preferable because it is less likely to cause defects such as separation of fine particles and exhibits stable characteristics.

After the inorganic fine particle layer is formed in this manner, a low surface energy resin layer is formed on the inorganic fine particle layer by using a silicone resin or the like on the upper portion of the inorganic fine particle layer as described above to form a composite coating film. To do. The thickness of the low energy resin layer on the inorganic fine particle layer is thin on the exposed heads of the inorganic fine particles, and relatively thick on the valleys formed between the particles. It is necessary to create a state in which smooth irregularities are left without completely eliminating the irregularities formed in the valleys. For example, it is preferable that the inorganic fine particles have a thickness of about 2 μm and the valleys have a thickness of about 5 to 10 μm. The specific types of low-energy resins and their coating methods are the same as described above. In order to improve the adherence of the low energy resin and the inorganic fine particles (and the adhesive or the substrate partially exposed as the valleys), for example, a chemical pretreatment using a known coupling agent or the like It is also possible to perform various physical pretreatments.

The second aspect of the second invention thus obtained
The coated body according to the aspect also has unevenness with a smooth final surface property, but the surface roughness Rmax is 20 to 20.
It is preferably about 150 μm.

In the case of the covering body according to the second aspect of the present invention, since a synthetic resin film, water-resistant treated paper or the like can be used as the base material, for example, a long base material wound in a roll shape. On the other hand, it can be said that inorganic fine particle coating and low energy resin coating are performed, and high production efficiency can be achieved. Then, it can be easily cut and applied to each of the rollers such as the impression cylinder, the intermediate cylinder, and the guide roller to be wound.

As a method of attaching the cover of the second invention to the roller body, a method of screwing or adhering, or a method of providing the roller body with a clamp device or a winding device having a winding shaft can be adopted. However, in particular, in the case of the cover of the second aspect, it can be easily attached using a double-sided adhesive tape or the like.

The structure of the roller formed by winding the roller of the first invention or the cover of the second invention as described above or the structure of the cover is not limited to the field of printing machines.
Similar to the ink in the printed matter as described above, as a roller for treating a film-like body having a surface to which an adhesive migration substance is applied or a surface coating thereof, contamination of the roller due to these adhesive migration substance hardly occurs. It is also clear that it can be suitably used as a highly durable one. Examples of the application other than the pressure roller for transferring and pressure-transferring the object to be printed in the printing machine include, for example, rollers in the pressure-contacting / transfer system for the object to be transferred in various copying machines, but are not limited thereto. Absent.

Further, in a printing machine using the roller for pressure-bonding / transferring the object to be printed according to the first aspect of the present invention or the roller for pressure-bonding / transferring the object to be printed around which the covering body according to the second aspect of the invention is wound. It is preferable to have a cleaning device for the roller for pressure-bonding / transferring the printing medium. Such a cleaning device
It is only necessary to have a cleaning body that can come into contact with the surface of the pressure roller for transferring and transferring the material to be printed at a portion that does not interfere with the transfer path of the material to be printed or other device configuration. The cleaning body may have a structure capable of coming into contact with the roller surface only at the time of completion of printing, or a structure capable of being brought into contact with or separated from the roller surface as appropriate during a printing operation. The cleaning body can provide a sufficient cleaning effect even if it is a dry type, but a wet type impregnated with a solvent is desired in order to obtain a higher cleaning effect. The cleaning element can be made of a soft and absorbent material such as felt, non-woven fabric, cloth material and paper material. Further, the roller surface may be in fixed contact or in rotational contact with the roller surface.

In particular, in the case of a printing press such as a newspaper rotary press that often prints one lot, it is conventionally indispensable to wash the guide rollers during the lot, and the main guide rollers are equipped with a washing device (wet type). However, by using the guide roller according to the present invention, it is not necessary to wash the roller in the middle of the lot, and even a slight ink stain on the roller at the end of the work can be cleaned by the cleaning device having the above simple structure. The necessary and sufficient cleaning effect can be obtained by a simple operation in which the body is lightly pressed against the roller surface and wiped off. Also, in the case of newspaper press, etc., the paper is passed through to make the rotation speed of the roller faster or slower than the paper feed speed.
Cleaning can also be performed by slipping the roller surface and the paper surface. Conventionally, in a newspaper rotary press, a cleaning operation is performed by applying a solvent to the roller surface to melt the ink on the roller surface and then performing such a slip. In that case, a sufficient cleaning effect can be obtained only by slipping dry without using a solvent.

Further, the cleaning mechanism for the impression cylinder of the offset printing machine can have a simpler structure.
That is, as an impression cylinder cleaning device in an offset printing machine using the impression cylinder according to the present invention, a cleaning body capable of pressing the roller surface of the blanket cylinder facing the impression cylinder is provided, and the cleaning body is attached to the blanket cylinder. It may have a sequence control mechanism for rotating the impression cylinder in contact with the blanket cylinder in a pressed state for a certain period of time. With such a configuration, at the end of the printing operation, the contact between the blanket cylinder and the impression cylinder is turned on while the cleaning body is pressed against the roller surface of the blanket cylinder and the blanket cylinder is rotated. This is because if the impression cylinder is rotated together with the blanket cylinder, the ink stains on the impression cylinder are reversely transferred onto the blanket cylinder and can be wiped off as stains on the blanket cylinder with a clean body.

[0083]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples.

Reference Example 1 The surface of a metal cylinder made of ductile cast iron was ground to a final finished diameter of −0.240 mm, and the diameter accuracy (cylindricity of 0.
01) was taken out, and then the surface was roughened by degreasing and blasting. The surface roughness Rmax at this time was about 35 μm.

After that, Ni-- having a powder particle size of 10 to 55 μm was used.
A Cr-alloy is used to form a Ni-Cr sprayed layer having a film thickness of about 30 μm on the surface of the cylinder by plasma spraying, and then g-Al ₂ O ₃ having a powder particle size of 10 to 44 μm is used and plasma sprayed in the same manner. As a result, a ceramic sprayed layer having a film thickness of about 70 μm was formed. Surface roughness Rmax of this ceramic sprayed layer
Is about 40 μm, and as shown in FIG. 2, it is a rugged rough surface having very sharp protrusions. The ceramic sprayed layer had pores with a size of 0.1 to several tens of μm, and the porosity was about 16%. The impression cylinder thus obtained was subjected to the following printing test.

Example 1 After the same procedure as in Reference Example 1 above was performed, 100 parts of a silicone resin release agent (KS776L manufactured by Shin-Etsu Chemical Co., Ltd.) and toluene 300 were placed on the ceramic sprayed layer.
Parts and curing catalyst (CAT-P manufactured by Shin-Etsu Chemical Co., Ltd.)
A solution obtained by mixing and stirring 1 part of L8) was impregnated and applied by a spray method, and then dried and solidified in a drying oven at 150 ° C. for 1 hour to form a silicone resin film on the surface of the ceramic sprayed layer. This silicone-based resin film completely closes the communicating pores of the ceramic sprayed layer and adheres thickly to the recesses of the pitch wave-like irregularities and thinly to the protrusions on the surface of the sprayed layer, completely covering the entire surface. The film thickness was in the range of 2 to 20 μm, although it varied depending on each part. The surface roughness Rmax after forming the silicone resin film was about 30 μm, which was a rough surface having smooth unevenness as shown in FIG. The impression cylinder thus obtained was subjected to the following printing test as in Reference Example 1 and further subjected to the following scratch resistance test.

Printing Test 1 The impression cylinders prepared in Reference Example 1 and Example 1 were
Installed on an offset printing machine (Korizen Corporation's two-sided machine made by Komori Corporation), red ink (Toyo Ink Co., Ltd.),
Double-sided printing was performed on 30,000 sheets of coated paper using HiPlus. For comparison and comparison, the same printing test was also conducted by using an impression cylinder which was polished after usual chrome plating. As a result, when the impression cylinder of Reference Example 1 was used, the surface of the impression cylinder had a rugged uneven shape,
Compared to a normal chrome-plated impression cylinder, the ink stain on the surface of the impression cylinder is less, but as the number of threaded sheets increases, the stain becomes more and more severe. It was revealed that the back stains on the printed matter became noticeable and could not be used in practice. In addition, the sharp protrusions on the surface of the ceramic sprayed layer remove the ink from the solid part of the printed matter, which makes it possible to countless microscopic voids of several μm, and the sharpness of the print is clearly inferior even by visual inspection. Was there.

On the other hand, in the case of the impression cylinder of Example 1, even after printing 30,000 sheets, only a very small amount of ink adhered to the fine protrusions on the surface of the impression cylinder. The amount of the adhered ink did not change even if the number of paper sheets was increased, and the ink adherence did not grow. In addition, ink is hardly transferred to the protrusions on the surface of the impression cylinder even at the part that comes into contact with the solid part of the printed matter, and there is very little and little dropout, which does not cause any problems in the print quality of the printed matter. A good printed matter could be obtained.

After the printing test was completed, an attempt was made to remove the ink adhering to the surface of the impression cylinder. In Example 1, it was possible to completely remove the slightly adhering ink by simply wiping it off with a dry cloth. However, in the case of the chromium-plated impression cylinder of the comparative control, it is difficult to remove it by such a treatment, and it cannot be removed without washing with white kerosene, and in the case of the impression cylinder of Reference Example 1, Even if such an organic solvent is used, the ink that has entered the fine recesses on the surface cannot be completely removed, and the ink that has been dissolved in the solvent and has fluidity will penetrate into the pores and be washed. It was difficult.

Scratch resistance test The surface hardness of the impression cylinder obtained in Example 1 was 4H when examined by a pencil hardness test, and moreover, even when the iron tool (driver) was strongly pressed and rubbed, it remained on the impression cylinder. There was a metallic scratch mark on the, but when I wiped it with my fingertip, this mark disappeared neatly. That is, the surface of the impression cylinder of Example 1 was not scratched, but the tool was scraped off and the slag adhered to the impression cylinder. This means that only fine protrusions on the impression cylinder surface of the tool come into contact with the tool, and these protrusions have an extremely thin silicone resin film deposited on the ceramics sprayed layer with high wear resistance. It is considered that this is because the hardness of the sprayed layer substantially has a strong effect. Although the silicone-based resin film directly contacts the tool on this protrusion, it only contacts as a very fine point and does not contact as a surface. The silicone resin film is only worn and removed only on the protrusions, and the silicone resin film is not peeled off as a surface.

On the other hand, for comparison, the silicone resin used in Example 1 or JP-A-62-94392 is used.
The surface hardness of a test body obtained by directly coating the surface of a cast iron cylinder with a smooth surface texture before blasting with some of the silicone resins disclosed in Japanese Patent No. It was easily scratched by simply rubbing it with a hard tool such as a tool.

Reference Example 2 The surface of a roller made of an aluminum alloy pipe was degreased and blasted to roughen the surface. The surface roughness Rmax at this time was about 35 μm. Then, a Ni-Cr alloy having a powder particle size of 10 to 55 μm was used, and the surface of the cylinder was subjected to plasma spraying to form a Ni film having a thickness of about 30 μm.
-Cr sprayed layer is formed, followed by powder particle size 10-44 μm
Similarly, plasma spraying was performed using g-Al ₂ O ₃ to form a ceramic sprayed layer having a film thickness of about 70 μm. The surface roughness Rmax of this ceramic sprayed layer was about 40 μm, and the surface was a wavy surface having very sharp protrusions as shown in FIG. The ceramic sprayed layer is 0.1
It has pores with a size of tens of μm and the porosity is about 1
It was 6%. The guide roller thus obtained was subjected to the following printing test.

Example 2 After performing the same procedure as in Reference Example 2 above, 100 parts of a silicone resin release agent (KS776L manufactured by Shin-Etsu Chemical Co., Ltd.) and toluene 300 were placed on the ceramic sprayed layer.
Parts and curing catalyst (CAT-P manufactured by Shin-Etsu Chemical Co., Ltd.)
A solution obtained by mixing and stirring 1 part of L8) was impregnated and applied by a spray method, and then dried and solidified in a drying oven at 150 ° C. for 1 hour to form a silicone resin film on the surface of the ceramic sprayed layer. This silicone-based resin film completely closes the communicating pores of the ceramic sprayed layer and adheres thickly to the recesses of the pitch wave-like irregularities and thinly to the protrusions on the surface of the sprayed layer, completely covering the entire surface. The film thickness was in the range of 2 to 20 μm, although it varied depending on each part. The surface roughness Rmax after forming the silicone resin film was about 30 μm, which was a rough surface having smooth unevenness as shown in FIG. The guide roller thus obtained was subjected to the following printing test as in Reference Example 2.

Printing Test 2 The guide rollers prepared in Reference Example 2 and Example 2 were replaced by foam presses (made by Miyakoshi Co., Ltd., respectively).
It was attached to MVF18), and a color pattern was printed with black, indigo, red, and yellow process inks for 40 hours continuously on high-quality paper. For comparison and comparison, the same printing test was also carried out by using a roll knurled with an ordinary aluminum alloy roll as a guide roller.

As a result, when the guide roller of Reference Example 2 was used, good slip resistance was obtained, and since the surface had a rugged surface with a grain-like shape, knurled aluminum for comparison was used. Compared with alloy guide rollers, ink stains were less and the cleaning frequency was about 1/2, but it was less, but as the number of threaded sheets increased, the stain became more and more severe. It became clear that the stains on the printed matter due to the ink stains on the rollers became noticeable and could not be used in practice.

On the other hand, in the case of the guide roller of Example 2, 4
Even after printing for 0 hours, only a small amount of ink adhered to the fine protrusions on the surface, and the amount of ink adhered remained almost unchanged even if the number of paper passing was increased. It did not grow. For this reason, stains on the printed matter that can be visually confirmed do not occur even after continuous operation for 40 hours, and a printed matter of good print quality could be obtained without cleaning the guide roller during the operation.

After the printing test was completed, an attempt was made to remove the ink adhering to the surface of the guide roller. In the case of Example 1, the ink adhering to the surface could be completely removed by simply wiping it with a dry cloth. This suggests that a dry type is sufficient as a guide roller cleaning device provided in the printing apparatus. On the other hand, in the case of the comparative control, it is difficult to remove it by such a treatment, and it cannot be removed without washing with white kerosene, and the cleaning device provided in the printing device also uses an organic solvent. It was confirmed that a wet cleaning device was necessary. Further, in the case of the guide roller of Reference Example 2, when washed with such an organic solvent, the ink dissolved in the solvent and having fluidity permeates into the pores, which makes it very difficult to wash. It was concluded that a sufficient wet cleaning effect cannot be obtained even with a conventional wet cleaning apparatus using an organic solvent.

Example 3 A low surface energy resin coating was applied to 100 parts of a silicone resin release agent (KNS316 manufactured by Shin-Etsu Chemical Co., Ltd.),
100 parts of toluene and curing catalyst (Shin-Etsu Chemical Co., Ltd.)
CAT-PL56) manufactured by CAT-PL56) was manufactured in the same manner as in Example 1 except that a solution obtained by mixing and stirring 3 parts was used.
When a printing test and a scratch resistance test were conducted in the same manner as described above, excellent results were obtained as in Example 1.

Examples 4 to 7 The low surface energy resin coating was used as a silicone resin in KR2046 (Example 4), X-40-2141 (Example 5), X-41-9710H (Example 6), or An impression cylinder was produced in the same manner as in Example 1 except that X-40-201 (Example 7) (both manufactured by Shin-Etsu Chemical Co., Ltd.) was used, and a printing test was conducted in the same manner as above. It was
Although there was a slight difference in the degree of dirt on the impression cylinder surface after the printing test, in all cases, good print quality was maintained as in Example 1, and the impression cylinder after printing was completed. The dirt on the surface could be completely removed by dry method.

Reference Example 3 A synthetic resin film (polypropylene type) having a thickness of 100 μm was directly coated with a silicone type resin release agent (KNS316 manufactured by Shin-Etsu Chemical Co., Ltd.) to a thickness of 3 μm to prepare a test piece. did.

Reference Example 4 The same synthetic resin film as in Reference Example 3 was coated with an average particle size of 200 μm.
The glass beads of (1) were adhered with an adhesive (acrylic) so that the glass beads cover the entire surface of the film and the glass beads were uniformly dispersed in a single layer to prepare a test piece.
The surface roughness of the obtained test piece was Rmax 140 μm.

Example 8 After the glass beads were adhered to the surface of the film by the same method as in Reference Example 4, the same silicone type release agent as used in Reference Example 3 was coated on the glass bead layer. The silicone-based mold release agent is relatively thin at the head of the glass beads, about 2 μm, and is relatively thick at the valley between the glass beads, about 5 to 10 μm. The surface roughness of the obtained test piece is The Rmax was 133 μm.

The test pieces of Reference Examples 3 and 4 and Example 8 thus obtained were subjected to the following gum tape peeling test and printing test.

Gum Tape Peeling Test In order to confirm the adhesion of the test piece surfaces of Reference Examples 3 and 4 and Example 8, a commercially available gum tape (width 25 mm × length 10) was used.
0 mm) was attached to the surface of the test piece, and the force required for peeling the test piece was measured.

As a result, in the initial stage, the cellophane tape was hardly adhered (peeling force of less than 5 g) in Example 8 and Reference Example 3, but 1 in Reference Example 4.
It took 10g of force. The peeling force of the polypropylene resin film itself as a comparative control was 480 g.

Next, in order to examine the change with time of the peeling force due to surface abrasion, each test piece was attached to a roll having a diameter of 100 mm with a double-sided adhesive tape so that the silicone resin layer or the glass bead layer faced the surface side. , Coated paper with a wrap angle of 90 °, tension force of 200g / c
The coated paper side was fixed, and the roller was rotated to perform a sliding abrasion test. In addition, on the coated paper surface,
A paper on which ink was regularly applied was used. Then, the gum tape peeling test as described above was carried out every predetermined number of rotations.
FIG. 10 shows the relationship between the cumulative number of rotations and the peeling force obtained for each test piece.

As is clear from the results shown in FIG. 10, the peel strength of the test piece of Reference Example 3 is significantly smaller than that of Reference Example 4 while the silicone resin release agent is present on the surface, The release agent is worn away at a small cumulative number of revolutions (about 1000 revolutions), and the peeling force is rapidly increased (that is, the stain resistance performance is reduced). Further, in the case of Reference Example 4, in comparison with the resin film as a comparison and control at the initial stage, the effect of forming the uneven surface with the glass beads is exerted, and the peeling force is small, but the cumulative rotational speed is large. Accordingly, the ink and the paper powder are deposited and deposited on the concave surface, and the peeling force is increased (deterioration of stain resistance performance). On the other hand, in the case of Example 8, the peeling force of which the peeling force is almost 0 at the initial stage becomes slightly larger as the cumulative number of revolutions increases, but the increase is extremely gradual and the stain resistance performance is long-term. To maintain. This is because the release agent wears off only on the convex portions of the glass beads, and the release agent in the recesses remains almost as it is, so that ink and paper powder do not adhere and accumulate in the recesses. It is considered that it does not lead to the deterioration of the stain resistance performance as in the case of.

Printing Test 3 The test pieces prepared in Reference Examples 3 and 4 and Example 8 were
A JP-40 double-sided printing machine manufactured by Akiyama Printing Co., Ltd. was wrapped around an intermediate cylinder using a double-sided adhesive tape, and an operation comparison test was performed on an actual machine. The paper used was coated paper, the ink was manufactured by Toyo Ink Co., Ltd., High Plus, and the plate was used as a test plate with a pattern with many solid parts for ink thick printing.

As a result, when the product of Reference Example 3 was used,
At the initial stage, the surface of the ink is naturally highly repulsive, but due to the high friction coefficient of the surface, the paper separation property between the intermediate cylinder surface and the paper surface is not so good. For this reason, when the paper is transferred from the first intermediate cylinder to the second intermediate cylinder to the impression cylinder, a slight misalignment occurs between the intermediate cylinder and the paper, but if the paper separation between the intermediate cylinder and the paper is poor, rubbing occurs there. Occurrence of scratches and stains on the printed surface.
In addition, with this test piece, the silicone release agent layer on the surface was worn away and dropped off as the number of prints increased, and the ink adhesion to the sheet surface suddenly increased after about one month, and the scratches and stains on the printed material were also very large. It became noticeable and was not practical.

When the product of Reference Example 4 was used, 50
When printing about 00 to 10000 sheets, the intermediate cylinder becomes very dirty and this becomes a double or stain on the printed matter. Therefore, it is impossible to continuously operate the long-term printer, and it is necessary to stop the machine and wash with gasoline etc. There is. This test piece can be said to be effective in reducing the friction with the paper because the contact with the printing surface is point contact, but the glass beads themselves have almost no ink resilience, and the ink deposited and deposited in the recesses is particularly・ Contaminants such as paper dust are very difficult to clean. The time and labor required for these cleaning and removal accounts for a large proportion of the printing process. In addition, stains that cannot be removed by washing each time accumulate in the recesses, and the ink repelling property further decreases.
It was necessary to replace with a new seat in three months. In addition, the deterioration of the sheet due to the solvent used for cleaning was also a non-negligible item.

On the other hand, when the product of Example 8 was used, stains on the intermediate drum surface were very small, and even when continuous printing of 60,000 sheets per day was performed, stains or double marks on the printed matter due to the stains on the intermediate drum did not occur at all. . Even slight ink stains could be easily removed by wiping with a cloth soaked with cleaning oil, and the amount of stain residue in the recesses was very small. In other words, by reducing the occurrence of defective prints due to dirt on the intermediate drum, improving productivity and reducing labor load by greatly reducing the frequency of cleaning,
It has a great effect, and the life of the ink has been greatly improved by maintaining the ink repellency for a long time.

[0112]

As described above, the pressure-bonding / transferring roller of the present invention and the press-bonding / transferring roller of the present invention wound with the coated body of the present invention have a fine surface property and are relatively The surface of the substrate is coated with a composite coating consisting of a ceramic sprayed layer or inorganic fine particle layer, which has smooth abrasion and has excellent wear resistance, and a low surface energy resin layer such as silicone resin with low surface energy. Ink is not likely to adhere to the surface of the ink. For this reason, various rollers arranged in the press-bonding / transfer system of the printing object in various printing presses, for example, an impression cylinder in an offset printing press, or an offset press (newspaper press, commercial offset press, foam press). It can be suitably used as a guide roller in various rotary presses such as a gravure printing machine and a flexographic printing machine, and when performing a large amount or long-lasting printing operation continuously, it is not necessary to perform a cleaning operation, and a stain is removed. It is possible to provide a printed matter of good print quality, which is excellent in durability. Furthermore, since the ink adhering to the surface can be easily removed by a dry method, the cleaning operation of the roller, which has been extremely dangerous and hard work in the past, can be extremely easy, and a very simple structure can be achieved. By incorporating the cleaning device into the device, it is possible to automatically clean the device, which is very effective in reducing the time and labor required for cleaning and the initial cost. Further, for example, in a business form rotary press, UV ink has been used to solve the problem of reverse transfer, but by using the guide roller of the present invention, the ink itself is high in cost. Also, without using UV ink, which has a complicated device configuration and becomes expensive,
It is possible to achieve the same printing level with ordinary ink.

In the embodiment of the coated body of the present invention in which a synthetic resin film or water-proof treated paper is used as the substrate, the productivity is excellent and the non-printed body pressure-bonded in various sizes of existing printing machines is used. -Even the transfer roller can be easily cut into any size and wound, and its application range is extremely wide.

Further, the roller having such a constitution is similarly excellent as various rollers not only in the field of printing machines but also in other fields for treating a film-like body having an adhesive migration substance applied to its surface. It has a great effect.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing a cross-sectional structure of an embodiment of a roller for pressure-bonding / transferring an object to be printed according to the present invention,

FIG. 2 is a diagram further schematically showing a sectional structure of a roller for pressure-bonding / transferring an object to be printed according to the present invention,

FIG. 3 is a diagram schematically showing a cross-sectional structure in a manufacturing process of the roller for pressure-bonding / transferring an object to be printed according to the present invention,

FIG. 4 is a cross-sectional view schematically showing a state in which the first embodiment of the cover according to the present invention is wound around a pressure roller for transfer and transfer of an object to be printed,

FIG. 5 is a diagram schematically showing a cross-sectional structure of a second embodiment of a cover according to the present invention,

FIG. 6 is a diagram showing a schematic configuration of a printing mechanism in an offset printing machine,

FIG. 7 is a schematic diagram illustrating ink stains on the impression cylinder during double-sided printing in offset printing,

8A and 8B are diagrams showing a relationship between an impression cylinder and a blanket cylinder and an object to be printed in an offset printing machine, FIG. 8A is a state in which a narrow object is being printed, and FIG. 8B is a wide object to be printed. Diagram showing the state printed on the body,

FIG. 9 is a diagram showing a schematic configuration of a printing and transporting mechanism of an object to be printed in another offset printing machine (rotary press);

FIG. 10 is a graph showing changes over time in the adhesive properties of the surfaces of various coated bodies obtained in the examples of the present invention.

[Explanation of symbols]

1 ... plate cylinder, 2 ... blanket cylinder, 3 ... impression cylinder,
4 ... Printed material, 5 ... Ink image, 6,
8 ... Transferred ink image, 7 ... Guide roller, 10 ... Metal roller base material 11, 23 ... Metal sprayed layer, 12, 24
... Ceramic sprayed layer, 13, 25, 34 ... Low surface energy resin layer, 14, 26, 35 ... Composite coating film, 2
0 ... Roller main body, 21 ... Covering body, 22 ... Metal plate material. 32 ... Base material (synthetic resin film or water-resistant treated paper), 33 ... Inorganic fine particle layer, 36 ... Adhesive layer.

[Procedure amendment]

[Submission date] June 23, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0053

[Correction method] Change

[Correction content]

Then, a ceramic sprayed layer is formed on the surface of the metal roller base material or the surface of the metal sprayed layer by using a known ceramics spraying method such as a plasma jet spraying method. The ceramic _{material, Al 2 O 3, TiO 2} , Al 2 O 3 -TiO 2, C
_{r 2 O 3, ZrO 2,} WC, WC-Co, Cr 3 C 2,
Examples thereof include, but are not limited to, TiC and the like or a mixture thereof, and a composite film in which ceramics and a metal are simultaneously sprayed to have conductivity, cermets and the like. The ceramic material is selected such that the adhesion strength with the metal roller base material or the sprayed metal, abrasion resistance, and the ceramic sprayed layer obtained have fine pores (continuous pores) of several μm to several tens of μm and a porosity of 5 to 5. It may be carried out in consideration of economical efficiency, such as having a surface roughness of 20% and a surface roughness Rmax of about 30 to 50 μm. In general,
White Alumina (W-Al ₂ O ₃₎ and gray alumina _{(G-Al 2 O 3)} (Al 2 O 3 -TiO 2), click <br/> Romi A (Cr ₂ O ₃₎ such as is desirable.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0054

[Correction method] Change

[Correction content]

The ceramic sprayed layer is desired to have fine pores (continuous pores) of several μm to several tens of μm with a porosity of 5 to 20% because the ceramic sprayed layer has a low surface energy resin described later. This is because the layers can be stably formed into a composite, and if the porosity is less than 5%, the surface-active resin may not sufficiently enter the inside of the ceramic sprayed layer and the peelability may be increased, while the porosity is 20%. This is because the strength of the ceramic sprayed layer, which is the skeletal structure of the composite coating, may be reduced if the content exceeds the range. Also the surface roughness degree is desired to have about Rmax 30 to 50 [mu] m, when depositing a low surface energy resins such as described below in the ceramic thermal sprayed layer on the surface, the low surface energy resin is stable This is because it is a range in which it is likely to adhere and finally form smooth irregularities of a necessary and sufficient size.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0105

[Correction method] Change

[Correction content]

[0105] As a result, at the initial stage, but for Examples 8 and Reference Example 3 gum tape was in a state hardly adhere (less peel force 5 g), 1 for Reference Example 4
It took 10g of force. The peeling force of the polypropylene resin film itself as a comparative control was 480 g.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B65H 5/06 A F16C 13/00 A 9026-3J // B29K 83:00 105: 04

Claims (27)

[Claims] 1. A roller for press-bonding / transferring a print medium arranged in a press-bonding / transfer system for press-contacting a print medium to a printing element and then transferring the print element in a printing device, comprising degreasing and blasting. A composite coating film comprising a porous ceramic sprayed layer and a low surface energy resin layer formed on the surface of the ceramic sprayed layer and in the holes is formed on the treated metal roller base material. A roller for pressure-bonding and transfer of printed materials. 2. The press-bonding member for press-printing according to claim 1, wherein the surface property of the roller for press-bonding and transferring the print member has a surface roughness Rmax of 20 to 40 μm and smooth unevenness.
Transfer roller. 3. The projections of the unevenness are 20 μm × 20 μm
The roller for pressure-bonding / transferring a printing medium according to claim 2, wherein the roller is present at a ratio of about 1 per 1 to 100 μm square. 4. The printed material pressure-bonding member according to claim 1, wherein a metal sprayed layer is formed between the metal roller base material and the composite coating film. Transfer roller. 5. The roller for pressure-bonding / transferring a printed material according to claim 1, wherein the low surface energy resin is a silicone resin. 6. The roller for pressure-bonding / transferring an object to be printed according to claim 1, wherein the roller is an impression cylinder or an intermediate cylinder for an offset printing machine. 7. The roller for pressure-bonding / transferring an object to be printed according to claim 1, wherein the roller is a guide roller for a rotary printing press. 8. In a printing apparatus, a printing material is crimped to a printing element, and is then transferred over a substantially entire circumferential surface of a printing material crimping / transfer roller arranged in a printing material crimping / transfer system. A covering body that is removably wound, and is formed on a flexible substrate with a hard base layer having fine irregularities on the surface and on the surface of the base layer without completely eliminating the irregularities. A cover body for pressure-bonding / transferring roller to be printed, wherein a composite coating film comprising a low surface energy resin layer is formed. 9. The coated article according to claim 8, wherein the low surface energy resin is a silicone resin. 10. A low surface energy resin layer formed on a surface of a porous ceramics sprayed layer as a base layer and on the surface of the ceramics sprayed layer and in a hole portion on a substrate made of a degreased and blasted metal plate material. The coated body according to claim 8 or 9, wherein a composite coating film consisting of and is formed. 11. A base layer formed by adhering a plurality of inorganic fine particles on a substrate made of a synthetic resin film or water-resistant treated paper, and a low surface energy resin layer formed on the surface of the base layer. The coated body according to claim 8 or 9, wherein a composite coating film is formed. 12. The surface texture of the coating has a surface roughness R
The coated body according to claim 10, which has a maximum unevenness of 20 to 40 µm and has smooth unevenness. 13. The protrusions of the unevenness are 20 μm × 20 μm.
The coated body according to claim 10 or 12, which is present at a ratio of about 1 per m square to 100 µm × 100 µm square. 14. The coated body according to claim 10, 12 or 13, wherein a metal sprayed layer is formed between the metal plate material and the composite coating film. 15. The coated body according to claim 11, wherein the fine particles are ceramic powder or glass beads. 16. The surface texture of the coating has a surface roughness R
The coated body according to claim 11 or 15, having a max of 20 to 150 µm and having smooth unevenness. 17. The covering according to claim 8, wherein the roller is an impression cylinder or an intermediate cylinder for an offset printing machine. 18. The coated body according to claim 8, wherein the roller is a guide roller for a rotary printing press. 19. A printing device comprising the roller for pressure-bonding / transferring an object to be printed according to claim 1. Description: 20. A printing apparatus comprising a roller for pressure-bonding / transferring an object to be printed, which is obtained by winding the outer peripheral surface of the covering body according to any one of claims 9 to 17. 21. The roller for pressure-bonding / transferring an object to be printed according to any one of claims 1 to 7, or claim 11 or 13.
A roller for press-bonding / transferring an object to be printed, which is formed by winding the outer peripheral surface of the object according to any one of claims 1 to 15, and the covering according to any one of claims 12, 16 and 17. A printing apparatus in which a roller for press-bonding / transferring an object to be printed, which is formed by winding a body around an outer peripheral surface, is arranged in a low load portion. 22. The cleaning device in the printing apparatus according to claim 19, further comprising a dry cleaning body that can be pressed against and disengaged from the roller surface of the roller for pressing and transferring the object to be printed. A cleaning device characterized by being 23. A cleaning device in an offset printing apparatus comprising the impression cylinder according to claim 6 or 17, comprising a cleaning body capable of pressing and disengaging from a roller surface of a blanket cylinder facing the impression cylinder. And a sequence control mechanism for rotating the impression cylinder in contact with the blanket cylinder for a certain period of time while the cleaning body is pressed against the blanket cylinder, and cleaning the impression cylinder together with the cleaning of the blanket cylinder. A cleaning device characterized by being able to perform. 24. A treatment roller for a film-like body having an adhesion-transferring substance applied to the surface thereof, wherein a porous ceramic sprayed layer and said ceramics are formed on a degreased and blasted metal roller base material surface. A roller having a composite coating film formed of a silicone-based resin layer formed on the surface of the sprayed layer and in the holes. 25. A coating body detachably wound around substantially the entire circumferential surface of a film-shaped processing roller having a surface to which an adhesive migration substance is applied, the surface being provided on a flexible substrate. A composite coating film comprising a hard base layer having fine irregularities and a silicone resin layer formed on the surface of the base layer without completely eliminating the irregularities. body. 26. A porous ceramic sprayed layer as a base layer, and a silicone-based resin layer formed on the surface of the ceramic sprayed layer and in the holes on a substrate made of a metal plate material that has been degreased and blasted. 26. The coated body according to claim 25, which has a composite coating film formed thereon. 27. A composite comprising a base layer formed by adhering a plurality of inorganic fine particles on a substrate made of a synthetic resin film or water-resistant treated paper, and a silicone resin layer formed on the surface of the base layer. The coated body according to claim 25, which has a coating film formed thereon.