JP3095814B2 - Overlay film for disassembling transparent document and method for attaching color document using the film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transparent original disassembling overlay film used when a color original is subjected to plate making and separation by a drum type scanner, and a color original for setting the original on a separation drum of a drum type scanner using the film. Related to the method of sticking.

[0002]

2. Description of the Related Art Generally, when plate making and separating are performed by a plate making drum type scanner, a Newton ring preventing process is performed in order to prevent an interference pattern (hereinafter referred to as Newton ring) generated by close contact between a color original and a separating drum. There is a need. For this reason, conventionally, a fine powder or a spray type matting agent was sprayed on a color original as a preventive at the time of decomposition at a low magnification, and as shown in FIG. Then, as shown in FIG. 12, the perimeter of the color document 11 is fixed to the separation drum 12 by stopping the periphery of the color document 11 with a plate making tape 13. At the time of decomposition at a high magnification, similar operations were performed using liquid paraffin as an inhibitor.

[0003]

However, in the above method, care must be taken so as not to cause unevenness in the powder processing and the spray processing on the original 11, and furthermore, the processing surface of the original 11 on which the powder processing has been performed is not applied. Extreme care was needed to avoid touching. Further, even after the disassembly, a complicated post-processing of dropping the powder or spray matting agent adhered to the document 11 is required. Therefore, in order to improve the operability, a method of preparing a large number of disassembling drums 12 and performing the attaching operation in parallel is employed, but the disassembling drum 12 is expensive, and thus causes a problem in cost. I was

In the case of disassembling a reflection original, a method has been adopted in which an original such as photographic paper is pasted on a disassembly drum, and a film having a matte surface on one side is wound thereon as an overlay. Examples of the film used in this method include West German Patent Application Publication No. 2109752.
As described in the specification, a transparent base film is provided with a coating layer in which an inorganic pigment such as silicic acid is dispersed in a binder (the weight percentage of silicic acid is about 1% based on the solid content of the coating layer). Are known in which fine projections are sparsely formed on the surface of the surface. However, when this film is used for transmission separation, since the surface of a color original is smoother than photographic paper, Newton rings occur due to the low density of fine projections on the film surface. . In order to prevent this Newton's ring, it is conceivable to increase the density and height of the projections by simply increasing the amount of the inorganic pigment added, but in this case, the transparency is reduced, or When the scanner is disassembled, there is a problem that the light transmittance differs in a minute area and appears as a particle pattern on the output film.
For this reason, a conventional overlay film for a reflective original cannot be used for a transparent original, and no overlay film for a transparent original has been developed.

The present invention has been made in view of the above problems and circumstances, and can prevent the occurrence of Newton rings and perform output decomposition when performing permeation decomposition using a drum-type scanner for plate making. It is an object of the present invention to provide a transparent original disassembling overlay film in which a particulate pattern due to the surface shape of the overlay film does not appear on the film, and an efficient original attaching method using the film.

[0006]

In order to achieve the above object, an overlay film for disassembling a transparent original according to the present invention is provided.
As shown in FIG. 1, a mat layer 3 composed of extender pigment and / or synthetic resin particles and a binder and having fine irregularities on the surface is provided on one side of a transparent support 2, and the fine irregularities have a height of 0. 0.2 to 2 μm peaks at least 20 mm / mm
It is configured so as to include the number.

The film used as the support 2 must have high transparency and toughness. Examples of such a film include a polyester film, a polyethylene film, a polypropylene film, a polycarbonate film, a polystyrene film, Examples thereof include a polyvinyl chloride film, a cellulose triacetate film, and an acrylic resin film, and a polyester film is particularly preferable because it has transparency, toughness, dimensional stability, and the like. Further, these films may be subjected to a corona treatment, a plasma treatment, or an undercoating treatment in order to enhance the adhesiveness with a binder.

[0008] Examples of extenders used to provide fine irregularities on the surface of the mat layer 3 include calcium carbonate, magnesium carbonate, barium sulfate, silica, aluminum hydroxide, kaolin clay, and talc. In order to obtain the Newton ring preventing effect, those having a particle size of 0.05 to 10 μm are used. In the case where an organic solvent-soluble resin or an ultraviolet curable resin is used as a binder, the use of hydrophobically treated silica improves dispersibility and viscosity stability. The synthetic resin particles used to provide fine irregularities on the surface of the mat layer include spherical acrylic resin fine powder, ethylene tetrafluoride resin fine powder, crosslinked polystyrene resin fine powder, polyurethane resin fine powder, and polyethylene resin fine powder. Powder, benzoguanamine resin fine powder, silicone resin fine powder, epoxy resin fine powder and the like. And among these, the particle size is 0.05 to 10 μm, preferably 0.1 to 5 μm.
Is used. These extender pigments and synthetic resin particles may be used alone or in combination of two or more. Further, both may be used in combination. These extender pigments and synthetic resin particles are added to the binder in the form of a solution with stirring, or dispersed thereafter. An appropriate amount of addition is 5 to 30 parts by weight based on 100 parts by weight of the binder. When the amount is less than 5 parts by weight, the transparency is good but the Newton ring preventing effect cannot be expected. When the amount is more than 30 parts by weight, the Newton ring does not occur but the transparency is reduced.

[0009] As the binder, a thermoplastic resin, a thermosetting resin, or an ultraviolet curable resin is used. Among them, as the thermoplastic resin, acetylcellulose, nitrocellulose, acetylbutylcellulose, ethylcellulose,
Cellulose derivatives such as methyl cellulose, vinyl acetate and its copolymers, vinyl resins such as vinyl chloride and its copolymers, vinylidene chloride and its copolymers, acetal resins such as polyvinyl formal and polyvinyl butyral, acrylic resins and their copolymers Acrylic resins such as polymers, methacrylic resins and their copolymers, polystyrene resins, polyamide resins, linear polyester resins,
Fluorine resin and polycarbonate resin are exemplified. Examples of the thermosetting resin include a phenol resin, a urea melamine resin, a polyester resin, an epoxy resin, a polyurethane resin, and a silicone resin. Examples of the ultraviolet curable resin include a resin containing epoxy acrylate, urethane acrylate, polyester acrylate or the like as a main component as a photopolymerizable prepolymer and a monofunctional or polyfunctional monomer as a diluent. When a material having a high surface hardness is used as the photopolymerizable prepolymer, it is possible to form a mat layer having excellent scratch resistance and abrasion resistance.

When a thermoplastic resin or a thermosetting resin is used among the above binders, the binder is dissolved in an organic solvent, and then an extender or a synthetic resin particle is added thereto and stirred.
Alternatively, dispersion is performed thereafter to prepare a coating solution. When using an ultraviolet curable resin as a binder, after diluting it with an organic solvent as necessary, add an extender pigment or synthetic resin particles and stir or disperse the coating liquid to form a coating liquid. adjust. Examples of the organic solvent include ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone; ethers such as methyl cellosolve and ethyl cellosolve; esters such as ethyl acetate, butyl acetate and cellosolve acetate; methyl alcohol, ethyl alcohol and propyl alcohol. And alcohols such as butyl alcohol and aromatic hydrocarbons such as benzene, toluene and xylene. These organic solvents can be appropriately selected and used in combination. In addition, a dispersant and a leveling agent are added as needed in order to improve the dispersibility and coating property of the coating liquid.

The application of the coating solution is carried out by a well-known coating method, for example, a dip coating method, a reverse roll coating method, a curtain coating method, a wire bar coating method,
It is performed by an extrusion coating method, a gravure coating method, or the like. Then, after applying the coating liquid, the organic solvent is volatilized by hot air or the like to form a target mat layer. When the binder is a UV-curable resin, the coating is cured by irradiating UV rays after application. When the ultraviolet curable resin contains an organic solvent, the organic solvent is volatilized by hot air or the like, and then the coating film is cured by irradiating ultraviolet rays to obtain a target mat layer.

The coating thickness of the mat layer 3 is 1 to 15
μm is appropriate. When the thickness is less than 1 μm, the extender and the synthetic resin particles are likely to fall off the mat layer 3 so that
If the thickness is more than 5 μm, the film may be curled, or the extender or synthetic resin particles may be buried in the binder, and a surface having a predetermined shape may not be obtained.

The surface shape of the mat layer 3 needs to have fine irregularities, and the irregularities have peaks of 0.2 to 2 μm in height of at least 20 per 1 mm in length.
Consists of surfaces including When the peak height is lower than 0.2 μm, there is no Newton ring preventing effect even if the number of peaks is increased, and when the peak is further increased, Newton rings are prevented, but transparency is reduced and a white coating film is formed. It becomes a film. When peaks having a height of more than 2 μm are formed, the individual peaks become large and the light transmittance due to the scattering of light due to the shape of the surface and the refractive index of the particles cause the light transmittance in a minute area to be reduced. This causes a difference, and the shape of the particulate pattern appears on the output film at the time of decomposition. The height of the peak is more preferably 0.4 to 1.5 μm. In this range, the heights of the peaks do not need to be uniform, but rather, it is better to mix peaks of various heights.
If the number of peaks is less than 20, the shape of a granular pattern appears as described above when gentle peaks continue, and Newton rings occur when steep peaks are sparsely connected. Conversely, if the number of peaks is too large, smoothness will appear and Newton rings will occur. Preferably it is 20-80. Such a surface shape can be formed by selecting the dispersion conditions in the process of dispersing the extender into the binder. In the case of synthetic resin particles, it is often only necessary to stir, and if they are strongly dispersed, the particles will be destroyed.

The height and density of the peaks in the mat layer 3 are as follows:
It was measured with a stylus type surface roughness measuring instrument. As the stylus type surface roughness measuring device, “Universal surface shape measuring device SE-3C” manufactured by Kosaka Laboratory Co., Ltd. was used. Specifically, the vertical magnification is 10,000 times, the horizontal magnification is 50 times, and the cutoff value is 0.25.
mm over the length of 1.5 mm on the film, counting the number of peaks present in a range of 1 mm on the film, and averaging the six measurements to determine the number of peaks per mm. Number. The height of the peak was measured with reference to the deep valley of adjacent mountains.

Further, in order to prevent the overlay film 1 from being charged, the surface of the mat layer 3 and the back surface of the support 2 can be subjected to an antistatic treatment. From the viewpoint of handling, it is better to perform these treatments. .

Next, the sticking method of the present invention is a method of sticking a color original on a separation drum of a drum type scanner by using the transparent original disassembling overlay film 1 having the above structure for winding.

One of the sticking methods is to apply a matting agent for preventing Newton's ring on the surface of the decomposition drum 4 as shown in FIG. After fixing one end so as to face the front surface, the color original 5 is successively sandwiched between the separation drum 4 and the overlay film 1 as shown in FIG. 3, and wound as shown in FIG.

Another sticking method according to the present invention is to apply a matting agent for preventing Newton rings on the surface of the disassembling drum 4 in the same manner as shown in FIG.
As shown in FIG. 6, a color original 5 is stuck on the mat layer 3 of the overlay film 1 with a tape 6, and the color original 5 is wound around the separation drum 4 together with the overlay film 1 as shown in FIG. In this case, in order to facilitate the winding, the tape 6 may be stuck in the top direction of the color original 5 with respect to the winding direction around the separation drum 4.

In the latter attaching method, an original attaching sheet in which the attaching positions of the originals are laid out may be used in order to increase the efficiency of the original attaching operation. That is, as shown in FIG. 7, the support 2 side of the overlay film 1 is attached to a separately prepared original sheet 7 so that the mat layer 3 side is exposed, and then both are integrated. As shown in FIG.
The color original 5 is pasted on the mat layer 3 of the overlay film 1 with the tape 6 as shown in FIG. In this case, the information 7b such as the document number and the magnification value can be seen through.
The document is specified by these pieces of information. As an apparatus for creating such a document pasting sheet, for example,
The device described in JP 9500 can be used.

In the latter attaching method, the overlay film 1 is used to increase the efficiency of the original attaching operation.
You may use what drawn the layout of pasting on itself. That is, as shown in FIG. 9, a document sticking line 8a and information 8b such as a document number and a magnification value are formed on the surface of the overlay film 1 on the side of the support 2 using the document sticking sheet producing apparatus as described above. A color original 5 is drawn on the mat layer 3 with a tape 6 as shown in FIG.

[0021]

When a color original is pasted on a separation drum using the transparent original separation overlay film having the above-mentioned structure, the color original and the overlay film do not adhere to each other, so that Newton rings do not occur during the separation. Also, no particulate pattern due to the surface shape of the overlay film appears on the output film.

Further, according to the above-mentioned attaching method, the color original is wound around the separation drum without changing the surface of the color original without matting.

[0023]

EXAMPLES The present invention will be described below with reference to examples, but these examples do not limit the present invention. In the examples, "parts" all indicate "parts by weight".

(Example 1) 100 parts of a polyester resin (Vylon # 200 manufactured by Toyobo Co., Ltd.) 10 parts of fine silicone resin powder (Tospearl 120 manufactured by Toshiba Silicone) 160 parts of toluene 160 parts of methyl ethyl ketone 240 parts On a support made of 100 μm polyester film The coating solution having the above composition was applied so that the film thickness after drying became 2 μm, and dried at 100 ° C. for 3 minutes to prepare an overlay film. Table 1 shows the measured values of the surface shape of the obtained mat layer. Next, after spraying a spray-type matting agent onto the disassembling drum of the scanner, one end of the overlay film is fixed so that the mat layer of the overlay film faces the surface of the disassembling drum, and a color is provided between the disassembling drum and the overlay film. Insert the original, magnification 15
Permeation decomposition was performed at 0%. No Newton rings were generated on the obtained output film, and no particulate pattern due to surface irregularities appeared.

(Comparative Example 1) Polyester resin (Vylon # 200, manufactured by Toyobo Co., Ltd.) 1000 parts Silica (average particle size 2.5 μm) 4 parts Toluene 5000 parts Methyl ethyl ketone 4200 parts It was applied on the top so that the film thickness after drying was 2 μm, and dried at 100 ° C. for 2 minutes. Table 1 shows the measured values of the surface shape of the obtained mat layer. Permeation decomposition was carried out in the same manner as in Example 1. However, generation of Newton rings was observed on the obtained output film.

(Example 2) 100 parts of acrylic polyol (Acrydic A-807 manufactured by Dainippon Ink and Chemicals) 15 parts of polyisocyanate (curing agent, Burnock DN-980 manufactured by Dainippon Ink and Chemicals) silica (average particle size: 3) 7.5 μm) 7.5 parts Toluene 40 parts Methyl ethyl ketone 60 parts A coating solution having the above composition was applied on the same support as in Example 1 so that the film thickness after drying was 9 μm, and dried at 120 ° C. for 3 minutes. went. Further, an antistatic agent having the following composition was applied to the back surface of the film with a wire bar # 5.
For 30 seconds to form an overlay film. Antistatic layer composition Staticide (manufactured by ACL) 10 parts Meta-modified alcohol 2700 parts Water 1300 parts The measured values of the surface shape of the obtained mat layer are shown in Table 1. Permeation decomposition was carried out in the same manner as in Example 1. However, no Newton rings occurred in the obtained output film, and no particulate pattern due to surface irregularities appeared, and good decomposition was performed. Was completed. This overlay film had a high surface hardness, was less likely to be damaged during the sticking operation, and had an antistatic property, so that there was no adhesion of dust and the like, and the workability was improved.

(Example 3) Urethane acrylate 100 parts (Cashew Hard C NO.300 manufactured by Cashew) Benzophenone (photoinitiator) 4 parts Silica (average particle size 3 μm) 9 parts Isopropyl alcohol 140 parts Ethyl acetate 70 parts The above composition Was applied onto a 100 μm-thick polyester film having been subjected to an adhesion subbing treatment so that the film thickness after drying was 10 μm, and dried at 70 ° C. for 5 minutes to volatilize the solvent. Thereafter, using a high-pressure mercury lamp, ultraviolet irradiation was performed twice at a lamp output of 120 W / cm, an irradiation distance of 14.5 cm, and a conveyance speed of 20 m / min to cure the resin, thereby forming an overlay film. Table 1 shows the measured values of the surface shape of the obtained overlay film. A color original was placed on the mat layer of the overlay film and fixed with tape. Separately, after spraying a spray-type matting agent onto the separation drum, the overlay film on which the color original is fixed is wrapped and fixed so that the color original is sandwiched between the separation drum and the overlay film, and the transmission decomposition is performed at a decomposition magnification of 200%. Was done. In the obtained output film, there is no occurrence of Newton's ring, and no particulate pattern due to surface irregularities appears,
Good decomposition could be performed. This overlay film had a high surface hardness and was less likely to be damaged in the sticking operation, thereby improving workability.

(Comparative Example 2) In the same manner as in Example 3, but with a reduced degree of dispersion was produced. Table 1 shows the measured values of the surface shape of the obtained overlay film. Then, when permeation decomposition was performed in the same manner as in Example 3, no irregularities on the surface of the mat layer appeared on the entire surface of the output film as a particulate pattern, although no Newton rings occurred.

[0029]

[Table 1]

[0030]

According to the overlay film for disassembling a transparent original according to the present invention, the surface of the mat layer provided on one side of the transparent support is formed by forming fine peaks and depressions having a height of 0.2 to 2.0 .mu.m and a length of 1 mm. Since it is formed so as to include at least 20 per unit, no Newton ring is generated at the time of disassembling with the color document sandwiched therebetween, and no particulate pattern due to unevenness of the mat layer surface appears on the output film. Therefore, good plate making and disassembling can be performed by using this overlay film.

In the sticking method of the present invention, a spray type matting agent is sprayed on a decomposition drum, and an overlay film having a mat layer fixed to the surface of a transparent support is used for winding. The color original is sandwiched between the separation drum and the overlay film and set as it is, so there is no need to matte the color original as before, and the color original is returned without being washed And it is not necessary to prepare a large number of expensive disassembling drums to improve the pasting work as in the past. it can. In particular, since the powder treatment can be omitted, it is possible to prevent powder from being caught in the scanner and deterioration of the working environment. According to this method, it is possible to automate the attaching operation.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a transparent original disassembling overlay film according to the present invention.

FIG. 2 is a perspective view showing a disassembly drum having a matting agent sprayed on a surface thereof.

FIG. 3 is a perspective view showing a procedure for sequentially interposing a color original between a separation drum and an overlay film.

FIG. 4 is a perspective view showing a state in which a color document is wound between a separation drum and an overlay film.

FIG. 5 is a plan view showing a state where a color original is pasted on a mat layer of an overlay film.

FIG. 6 is a perspective view showing a state in which a color document is wound between a separation drum and an overlay film.

FIG. 7 is a plan view showing a procedure for integrating the document sticking sheet and the overlay film.

FIG. 8 is a plan view showing a state where a color document is pasted on a mat layer of an overlay film integrated with a document pasting sheet.

FIG. 9 is a plan view showing a state where a layout to be pasted is drawn on the surface of the overlay film on the support side.

FIG. 10 is a plan view showing a state where a color document is pasted on a mat layer of an overlay film on which a layout for pasting is drawn.

FIG. 11 is a perspective view showing a procedure of a conventional method for winding a color original around the surface of a separation drum.

FIG. 12 is a perspective view showing a state in which a color original is pasted on a separation drum by a conventional method.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 overlay film 2 support 3 mat layer 4 separation drum 5 color original 6 tape

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Makoto Uehara 4-6-35 Suzuya, Yono-shi, Saitama, Japan Kimoto Development Laboratory Co., Ltd. (56) References JP-A-60-108849 (JP, A) Sho Akai Kai 59-66243 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03F 1/00-1/18

Claims (3)

(57) [Claims] 1. Plate making of a color original with a drum type scanner
Overlay file for transparent document disassembly used for disassembly
And a mat layer comprising a filler and / or synthetic resin particles and a binder and having fine irregularities on the surface is provided on one surface of the transparent support, and the fine irregularities have a height of 0.2 to
An overlay film for disassembling a transparent original, comprising at least 20 2 μm peaks per 1 mm length. 2. A method for attaching a color original to a separation drum of a drum type scanner using the transparent original separation film according to claim 1, wherein a matting agent for preventing Newton rings is applied to the surface of the separation drum. A color document, wherein the color document is scattered and fixed at one end so that the mat layer of the overlay film faces the surface of the separation drum, and then a color document is sequentially sandwiched and wound between the separation drum and the overlay film. How to paste. 3. A method of attaching a color original to a separation drum of a drum-type scanner using the transparent original separation film according to claim 1, wherein a matting agent for preventing Newton rings is provided on the surface of the separation drum. A method of pasting a color document, wherein the color document is pasted on a mat layer of the overlay film with a tape, and the color document is wound around a separation drum so as to sandwich the color document inside.