JP2740765B2 - Wet paper print, manufacturing method thereof and wet paper printing apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the use of various functional inks on a wet paper on a paper machine containing a large amount of water.
By transferring the ink to the wet web in graphic or printing apparatus comprising a mechanism capable of printing characters, wet paper prints and its manufacturing method and the wet paper web printing apparatus having a forgery and copying prevention function obtained by printing It is about.

[0002]

2. Description of the Related Art In a conventional wet paper print, in a cutting process, a register mark serving as a guide for cutting a fixed position of a paper is printed on a wet paper on a paper machine. And a printing mechanism consisting of an inking roller coated on the surface with a liquid-retaining material. The solvent is mainly composed of a high boiling point glycol-based solvent (glycol ether) compatible with water.
It has been produced using an ink obtained by dissolving an insoluble polymer resin in water such as rosin or maleic acid resin having an acid value of about 200 to 300 and adding a coloring agent to the vehicle [Japanese Patent Publication No. 60-229785 (JP-A-60-229785). Name: wet paper printing method) See gazette]. The conventional ink drying mechanism is based on the fact that a water-soluble solvent penetrates the wet paper when it comes into contact with wet paper containing a large amount of water, and the water-insoluble resin and pigment precipitate on the wet paper. Solidifies. However, since the ink contains a large amount of a high-boiling-point glycol-based solvent, drying of the ink film is delayed, the ink adheres to the rollers of the paper machine, and the ink re-transfers to the paper, causing a problem that stains are generated. there were. Also, printing on wet paper whose surface is not sufficiently stable causes paper peeling, and the printing plate surface is metallic, so the allowable range of printing pressure is narrow, fading and marginal zones are likely to occur, and uniform printing Was difficult. Furthermore, on the metal plate side,
There is also a problem that processing accuracy and processing shape are limited, design (printing pattern) is also restricted, and time and cost are required for plate production. On the other hand, functional microcapsules, mica titanium-based pigments (pearl pigments), fluorescent pigments, and the like have very large particle diameters and special shapes and properties. Printing was difficult by letterpress printing or offset printing, and printing was generally performed by a screen printing machine. However, screen printing has been difficult to adopt for banknotes, various securities, and the like due to problems attributable to printing speed and printing patterns (such as color prints). Therefore, printing inks using titanium mica pigments, microcapsules, fluorescent pigments, etc. can be used for printing banknotes and securities, etc., and the technology for manufacturing high-addition and high-quality printed products with anti-counterfeiting and copy protection. For the purpose of establishment, along with the development of an ink vehicle and a printing mechanism that can print on wet paper on a paper machine, counterfeiting and copy protection using inks of functional pigments such as microcapsules, mica titanium-based pigments and fluorescent pigments It has been desired to develop a technique for producing a high-quality printed matter having the following characteristics.

[0003]

The conventional wet paper printing method aims at printing a register mark for cutting the paper into a fixed position on the wet paper, and the conventional ink uses a high boiling point glycol-based solvent. A printing machine that is made using an ink obtained by dissolving a resin in a main solvent and adding a colorant to this vehicle, and is composed of a metal letterpress surface and an inking roller whose surface is covered with a liquid-retaining material. Printing was being performed by the mechanism. In conventional wet paper web printing, of course, the printing quality and ink fastness required with the commercialization of the printed matter are not considered, and the drying speed of the printing ink is slow, and the rollers of the paper machine placed after printing are When the printing surface comes into contact with the rollers, there is a problem that the undried ink stains the rollers. The present invention solves the above-described problems, and performs printing with good reproducibility on the entire surface of the wet paper or at an arbitrary position. It is an object of the present invention to provide a wet paper printed matter having a high effect of preventing and copying, a method of manufacturing the same, and a printing apparatus therefor. Functionality
Titanium mica pigment as a pigment having, microcapsules, using an ink containing a combination of a fluorescent pigment or a colored pigment or mixtures thereof pigments, development of an ink vehicle having excellent fastness properties, high in wet paper on the paper machine A printing device consisting of a printing mechanism capable of high quality printing
The printing unit performs printing integrally with the paper making in the loading unit, and enables wet paper printing that can maximize the function of the functional ink. For the ink vehicle, consider various vehicles and make sure that components other than pigments are dissolved or dispersed in water.
That aqueous vehicle at a water-soluble resin (an aqueous acrylic resin emulsion) vehicle Moshiku is the use of emulsion resin (water-based resin emulsion) vehicle, sufficient conditions required for problem solving and the present invention on the wet paper printing Have found that they can be satisfied. The former water-soluble resin vehicle is a polymer resin having a carboxyl group in the molecular structure,
It is composed of water, amines (ammonia and morpholine), and the resin is dissolved in water in the presence of ammonia and morpholine. Therefore, in the drying mechanism of the ink, the solubility of the resin in water is reduced due to the evaporation of the low-boiling amine (ammonia and morpholine), and the resin is solidified. Moreover, it has a feature that the water in the vehicle penetrates the wet paper quickly. In the latter emulsion resin vehicle, water-insoluble polymer spherical particles (polymer colloid) are dispersed in water. After printing, the water in the ink penetrates into the wet paper and the water molecules separate to form polymer particles. Fusing and solidifying. Further, the polymer resin adheres to form a tough film, and the ink is characterized by having excellent mechanical strength and fastness. On the other hand, when printing on conventional wet paper, the printing mechanism is composed of a metal letterpress surface and an inking roller whose surface is coated with a liquid-retaining material. Was narrow, and blurring and marginal zones were likely to occur, making uniform printing difficult. Also, the printing plate surface is limited in processing accuracy and processing shape,
There are also restrictions on the design (print pattern), so that only solid marks with a very small area can be printed. Furthermore, it took time and cost to prepare a metal plate. On the other hand, printing with inks containing mica titanium-based pigments, microcapsules, fluorescent pigments, and the like, which are functional, is performed by screen printing due to the special properties of the pigments. However, it is difficult to employ banknotes and various securities for printing. The present invention is an ink containing a pigment having a functional property on wet paper even if the ink viscosity is as low as about 1 to 2 P. The ink required for commercialization of banknotes and various securities in consideration of counterfeiting and copying prevention effects is provided. In order to perform quality printing, a photosensitive resin plate having the required size and elasticity, an anilox roller having countless fine cells,
Rubber roller, from the printing mechanism of arranging the ink pan, etc. in order
The composed printer, was placed in the press apparatus of the paper machine. As a result of various improvements and examinations of the above-described apparatus, the use of a photosensitive resin plate having elasticity enables uniform printing on wet paper whose surface is not sufficiently stable. In addition, the quality of printed matter can be improved, and the use of a photosensitive resin plate greatly reduces design constraints and solves the problems of plate production time and cost. In addition, the printing mechanism has a myriad of fine cells that have been processed to the appropriate shape and size to sufficiently retain and transfer pearl pigments , microcapsules, fluorescent pigments, etc. , which have large particle diameters and special shapes and properties. By preparing and arranging an anilox roller (ink application roller) having a rubber roller, etc., the transfer of the functional pigment between rollers and to the plate surface is improved,
The problem of printing speed was also solved. With these improvements, a wet paper print with a gradation of 5 to 120 lines / inch,
It is possible to produce a line drawing having a line number of 165 lines / inch, a solid print, and a complicated pattern of a wet paper print obtained by combining them. Enabled printing of vouchers and securities. The invention described in claim 3 is directed to an aqueous paper in which components other than pigments are dissolved or dispersed in water on wet paper on a paper machine containing a large amount of water.
The Hikuru, using an ink containing a combination of fluororesins and various coating agents, the ink is transferred to the wet paper partially halftone, line drawing, also symbol consists of solid from the printing mechanism capable of printing a character A printing device, and a press unit of the paper machine.
With the printing by imparting at the same time as the papermaking paper, the design or are intended to provide anti-falsification paper of changing the paper quality characteristics of the portion of the character. This is because when the intaglio printing is overprinted on the offset printing by changing the smoothness and oil absorption of the paper surface, a phenomenon occurs in which the ink of the intaglio printing of the subsequent printing does not transfer onto the offset printing. Utilizing this phenomenon, when performing overprinting using the printing paper, a pattern in which a part of a continuous pattern of post-printing is missing is formed, and a special pattern that cannot be formed by ordinary printing by combining the patterns of both printings is formed. It is possible to create a simple printed pattern. The forgery prevention paper obtained by the printing is very effective for forgery prevention printing, and can be used for printing bank notes, various securities, and the like.

[0004]

In order to achieve the above object, in the present invention, the vehicle of the printing ink is replaced by a pigment or the like.
An aqueous vehicle in which the other components were dissolved or dispersed in water . Water-soluble resin vehicle or emulsion resin vehicles, pearl pigment as the pigment having a functional microcapsule, fluorescent pigments and the like, or or colored pigment with a printing ink formulated with mixtures of these pigments, the printing ink
Is allowed dots transferred to the wet paper web, line drawing, also symbol consists of solid printing plate surface that can print high-quality wet paper prints consisting of characters using the resin letterpress is an elastic body, the printing Lee to the resin relief plate
The printing apparatus comprising a composed printing mechanism ink anilox roller and an ink pan having innumerable fine cell to transfer a rubber roller and the fountain roller to transfer to the anilox roller Nki was placed in the press apparatus of the paper machine, the A wet paper printed matter obtained by integrally printing the pattern or character on the wet paper on a paper machine at the time of paper making, a method for producing the wet paper, and a printing apparatus therefor. Also, partially halftone, line drawing, symbols or by the character constituted by a solid, and aims to provide a smoothness, the printing paper was applied by wet paper print different regions of paper quality characteristics of oil absorbency, etc., In wet paper on a paper machine containing a large amount of water, components other than pigments dissolve in water or
The Dispersed aqueous vehicle, fluororesin Hitoshimata by using an ink containing a combination of coating agent, the printing ink to the wet web
A pattern composed of halftone dots, line drawings, and solids after being transferred
Resin letterpress or printing plate surface capable of printing a character having an elastic
Using the printing ink of the ink pan on the resin relief printing plate
Transfer fountain roller, rubber roller, fine cell
Arrange anilox rollers and doctors with innumerable
Printing device comprising a printing mechanism, and a press device of the paper machine.
Wet paper prints and a manufacturing method thereof formed by printing integrally the figure patterns or characters installed in parts during papermaking of the paper and the wet paper printing instrumentation
It is a place.

[0005]

The ink vehicle for printing on wet paper on a paper machine containing a large amount of water has the effect of speeding up the penetration of the vehicle between paper layers by making it aqueous. The ink comprising the aqueous resin vehicle used in the present invention is composed of a polymer resin having a carboxyl group in its molecular structure, water, amines (ammonia and morpholine), and has a low boiling point on wet paper containing a large amount of water after printing. The amine (ammonia and morpholine) evaporates, and the permeation of the water in the vehicle into the paper layer is added, so that the solubility of the resin in water decreases rapidly and the resin solidifies. Therefore, it is possible to eliminate troubles such as the transfer of the ink to the rollers after printing and the occurrence of stains. In addition, in the ink composed of the emulsion resin vehicle, spherical particles of a polymer insoluble in water are dispersed in water, and after printing, water in the vehicle penetrates into a paper layer, water molecules are separated, and polymer particles are fused. And solidify.
Further, since the polymer resin adheres, a tough film is obtained, and there is no trouble such as dirt. On the other hand, a pearl pigment, printing with ink containing microcapsules or fluorescent pigment or the like, since the particle size of the pigment or the like has a large special shape and nature, but other than screen printing is difficult to printing, screen printing Has been difficult to adopt for printing banknotes and securities requiring a forgery and copy protection function due to problems caused by printing speed and printing patterns (such as color prints). But,
The use of an elastic plate surface such as a photosensitive resin solves the problem of being restricted by printed patterns (color prints and the like), so that complicated printing such as halftone dots and fine lines can be performed.
Since the allowable range of the printing pressure is greatly expanded, the problem of blur and marginal zone is solved, and high-quality printing with uniform reproducibility becomes possible. In addition, the printing system uses a transfer method that uses an anilox roller and a rubber roller that have a myriad of fine cells with an appropriate shape and depth to hold and transfer a functional pigment with a large particle size from the ink pan to the plate surface. by large pearl pigment particle size, retention of the rollers and between the plate surface, such as microcapsules or fluorescent pigments, transition is improved, also solved printing speed problems. Also, the apparatus is installed in a press part of a paper machine,
By using the functional ink composed of the aqueous vehicle, printing can be performed integrally with the production of paper, and a printing process performed in a post-process can be omitted, so that significant labor and cost savings can be achieved. it can. In addition, components other than pigments are dissolved in water on wet paper on a paper machine that contains a large amount of water.
The solution or dispersion to have an aqueous vehicle, fluororesin Hitoshimata by using the ink formulated with various coating agents, partially halftone, line drawing, a symbol or character composed of solid, paper papermaking integral Is applied by printing using the printing device,
Part on the pattern or can be produced a sheet with varying paper quality characteristics of the portion of the character. Ink continuous intaglio printing and perform overprinting printing offset printing and intaglio printing using a printing sheet described above to manufacture, the partial pattern or not metastasis patterned portions phenomenon occurs, not possible with conventional printing Such a printed pattern can be created. The printing paper obtained by the printing is a very effective printing means for preventing forgery, and can be used for forgery-preventive printing of banknotes, securities, and the like.

[0006]

EXAMPLES The present invention will be described in detail with reference to Examples.
The present invention is not limited in any way by this example.

(Embodiment 1) As shown in FIG. 1, a printing mechanism used in the present invention is shown in FIG. 1 where 1 is an impression cylinder, 2 is a printing plate surface, 3 is a printing plate cylinder, 4 is an anilox roller, and 5 is a doctor blade. , the fountain roller 6, 7 ink pan, 8 in the printing ink, dampening using a photosensitive resin plate having elasticity [e.g. manufactured by Asahi Kasei Corporation, trade name AFP] as a printing plate surface 2
The paper printing apparatus is installed in a press unit on a paper machine. In wet paper printing, the printing ink is applied to wet paper on a paper machine.
A printing mechanism including the printing plate surface 2 having elasticity to be transferred to the wet paper and the anilox roller 4 can perform printing, and is not limited to the apparatus. As the printing ink 8, an acrylic water-based resin emulsion [for example, manufactured by Nippon Acrylic Chemical Co., Ltd., trade name I-9]
4] with aqueous ammonia and an aqueous morpholine solution,
A vehicle in which a colored pigment or a fluorescent pigment is blended with a vehicle whose viscosity is adjusted to 1 to 2 poise is used. As printed matter, wet paper printed matter having a gradation of 5 to 120 lines / inch,
A line drawing having a maximum line number of 165 lines / inch and a solid pattern and a combination thereof are formed into a wet paper print having a complicated pattern. These prints were extremely good without blurring or marginal zones.

Example 2 An aqueous resin emulsion [eg, X-436, manufactured by Seiko Chemical Co., Ltd.] was used as a vehicle, and a mica-titanium pigment coated with a titanium compound was blended. To produce a wet paper print. The color of the printed matter changes due to the pearl luster and interference peculiar to the mica titanium pigment coated with the titanium compound. The polychromatic function is sufficiently developed. Since the printed matter having such gloss is difficult to reproduce with a copying machine, it has an extremely effective forgery prevention effect when used for banknotes, securities, and the like.

Example 3 Components other than pigments are dissolved or dispersed in water in wet paper on a paper machine containing a large amount of water.
The aqueous vehicle by which, fluororesins or by using an ink blended with various coating agents, partially halftone, line drawing,
Example symbol consists of solid or capable of printing a character
The printing apparatus described in 1 is used to apply the above-mentioned printing integrally with the paper making, and a wet paper print is produced in the same manner as in Example 1. According to this embodiment, it is possible to produce a wet paper print in which the paper quality characteristics such as the smoothness and oil absorption of the paper are partially changed according to the printing method such as intaglio printing or offset printing. This causes a phenomenon that when the intaglio printing is overprinted on the offset printing by changing the smoothness and oil absorption of the paper surface, the ink of the intaglio printing of the subsequent printing does not transfer onto the offset printing. For example, a fluororesin has a function of repelling ink, and a coating agent or the like has a function of increasing the smoothness and oil absorption of paper to suppress ink acceptability. By utilizing these phenomena, when performing overprinting with the offset and intaglio printing using the wet paper printing paper, a part of the continuous pattern of the post-printing can be absent, and the patterns of both printings can be removed. In combination, a special printed pattern that cannot be obtained by ordinary overprinting can be created.
Therefore, the wet paper printing paper obtained by the printing is very effective for forgery prevention printing, and can be used for forgery prevention printing of banknotes, various securities, and the like.

[0010]

As described above, the present invention makes it possible to apply various inks or resins to a wet paper containing a large amount of water on a paper machine, and has the following effects. . With respect to an ink vehicle to be printed on a wet paper of a paper machine containing a large amount of water, by making it water-based, there is an effect that the penetration of the vehicle between paper layers is accelerated and drying is promoted. The water-soluble resin vehicle used in the present invention promotes drying by the penetration of water into the wet paper and the evaporation of the low-boiling amine, and the emulsion resin vehicle fuses the polymer particles by the penetration of water into the wet paper. Solidifies to obtain a tough film. The ink containing the resin vehicle was excellent in mechanical strength and fastness, and therefore, no trouble such as staining occurred with the ink using both vehicles. Generally, titanium mica-based pigments and microcapsules coated with a titanium compound are mainly printed by screen printing due to their particle shape. However, due to problems attributable to printing speed and printed patterns (colored patterns, etc.), banknotes may be used. And the adoption of printing securities was difficult. In the offset printing method for printing bank notes, securities, and the like, it has been difficult to obtain a printed material utilizing the features. The present invention uses a photosensitive resin plate surface having elasticity. Uniform printing on wet paper with insufficient fiber binding is possible, fading and marginal zones are prevented, print quality can be improved, and the use of a photosensitive resin plate surface restricts design. Has been greatly reduced, and the problems of plate making time and cost have been solved. In addition, by disposing anilox rollers with countless fine cells processed to the appropriate shape and size and adding a rubber roller, etc., sufficient retention transfer of functional pigment between rollers and to the plate surface is possible become,
The problem of printing speed was also solved. With these improvements, a wet paper print with a gradation of 5 to 120 lines / inch,
It was possible to produce a line drawing having a line number of 165 lines / inch, a solid pattern, and a wet paper print having a complicated pattern combining these. In this way, by printing a single color or a multi-color on a paper machine, it is possible to produce a printed material with rich gradations without going through a printing process as in the related art. In particular, printed matter printed using mica titanium pigment coated with a titanium compound and microcapsules having various functions has a unique gloss and function, and when copied with a copying machine, has no gloss and has functionality. Since it has the characteristic of being reproduced only in a single color, it is extremely effective to use it as a copy protection measure. According to the present invention, it is possible to prepare paper printed with an ink composed of a mica titanium pigment or a microcapsule coated with a titanium compound at a fixed position on a wet paper in a papermaking process, and is effective in preventing copying or forgery. Since it is possible to manufacture a suitable paper, a printing step performed later can be omitted, and there is a great merit that a large labor saving and cost reduction can be achieved. In addition, components other than pigments are contained in the wet paper.
An aqueous vehicle dissolved or dispersed in water,
Using like or ink blended with various coating agents, partially halftone, line drawing, symbol or consists of solid to provide anti-falsification paper which characters by changing the paper quality properties imparted by the printing A special printing pattern can be created by overprinting such as offset printing and intaglio printing using the paper, which is very effective for forgery prevention printing, and can be used for printing bank notes, securities, and the like.

[Brief description of the drawings]

 FIG. 1 is an explanatory view for assembling the wet paper web printing apparatus.

[Explanation of symbols] 9 Wet paper

 ──────────────────────────────────────────────────続 き Continuing on the front page Judge Mikio Kinoshita Judge Chief Judge Miyako Kaneo Judge Eichi Rokka (56) References JP-B Showa 64-5825 (JP, B2)

Claims (5)

(57) [Claims] To 1. A moisture on paper machine large amount inclusive state wet paper web, the aqueous vehicle component other than the pigment is dissolved or dispersed in water, the microcapsules, titanium mica as a pigment having a functional pigments, fluorescent pigments, and the like, or colored pigments Moshiku
By using a printing ink formulated with mixtures of these pigments,
Printing with elasticity capable of transferring the printing ink to the wet paper and printing a pattern or character composed of halftone dots, line drawings, and solids
Plate surface, a fine cell for transferring the printing ink to the printing plate surface.
Printing mechanism with anilox rollers with numerous
Is installed in the press unit of the paper machine.
Te, wet paper printed matter characterized by comprising printing a figure pattern or character. To 2. A moisture on paper machine large amount inclusive state wet paper web, the aqueous vehicle component other than the pigment is dissolved or dispersed in water, the microcapsules, titanium mica as a pigment having a functional pigments, fluorescent pigments, and the like, or colored pigments Moshiku
By using a printing ink formulated with mixtures of these pigments,
Printing with elasticity capable of transferring the printing ink to the wet paper and printing a pattern or character composed of halftone dots, line drawings, and solids
Plate surface, a fine cell for transferring the printing ink to the printing plate surface.
Printing mechanism with anilox rollers with numerous
Is installed in the press unit of the paper machine.
And producing a wet paper print by printing the pattern or character . 3. A water-based paper in which components other than pigments are dissolved or dispersed in water on a wet paper on a paper machine containing a large amount of water.
The Hikuru, using a printing ink containing a combination of fluorine resin or the like or coating agent, by transferring the printing ink to the wet web partial dot, line drawing, can print a configured pattern or characters of a solid elastic A printing plate surface having
Anilox slot with innumerable fine cells for transferring the key
A printing device comprising a printing mechanism in which
Be installed in the press apparatus unit, print the figure patterns or characters
Wet paper prints, characterized in that that. 4. A wet paper on a paper machine containing a large amount of water.
Water-based plastics in which components other than pigments are dissolved or dispersed in water.
Printing a mixture of a vehicle and a fluororesin or coating agent
Transfer the printing ink to the wet paper using
Prints patterns or characters composed of typical halftone dots, line drawings, and solids
Printing plate surface having a can elastically, the printing in the said printing plate surface
Anilox slot with innumerable fine cells for transferring the key
A printing device comprising a printing mechanism in which
Install it in the press unit and print the design or characters.
A method for producing a wet paper print, comprising producing a wet paper print. 5. A moisture on paper machine large amount inclusive state wet paper, using a printing ink of claim 1 or 3, wherein said
Dot by transferring printing ink to the wet web, line drawing, the printing plate <br/> surface also symbol consists of solid having elasticity capable of printing characters, to transfer the printing ink to the printing plate surface fine printing mechanism arranged anilox roller having countless such cells
The said pattern or character is printed by the said 1 or 3
Wet paper printer, wherein a printing apparatus for producing wet paper prints according installed in the press apparatus of the paper machine.