JPH07189198A - Paper incapable of duplicating - Google Patents

Abstract

PURPOSE:To obtain paper incapable of duplicating by using a cut vapor- deposited film. CONSTITUTION:This paper incapable of duplicating has a structure obtained by successively laminating (1) a paper support, (2) an adhesive resin layer containing a cut vapor-deposited film obtained by subjecting a synthetic resin film to metal vapor deposition to provide a colorless protective layer and finely cutting the film and (3) transparent paper. The transparent paper is preferably tracing paper, impregnated paper or Japanese paper using a beaten cellulose fiber and having >=65% transparency. Irradiation light of a light source part of a duplicating machine is subjected to specular reflection by high light reflecting property of the cut deposited film when duplicated and as a result, the cut vapor-deposited film part appears as black point and it is clearly judged to be a duplicated paper and duplicated contents are made unreadable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-copyable sheet, and more particularly to a non-copyable sheet having excellent printability and a high copy preventing effect.

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-copyable paper using a metal vapor deposition film (hereinafter referred to as a cut vapor deposition film) obtained by subjecting a synthetic resin film to metal vapor deposition to provide a transparent protective layer, and then cutting and segmenting the metal vapor deposition film. It is a thing. The cut vapor deposition film itself has been used as a highly decorative material by being kneaded into a paint or sprayed on the surface of an adhesive before drying.

With the progress of copying machines, the opportunities for copying books and documents have increased dramatically. With this trend, it is considered that the chances of copyright infringement in books and leakage of confidential documents are also increasing. In order to prevent the leakage of confidential document contents due to such copying, some non-copyable papers have been conventionally proposed.

For example, a pattern is attached to the surface of the original copy in a light color so that it does not affect the actual vision, but the pattern is copied at the same time when copying, so that it is very difficult to read the system or the surface of paper or sheet. After metal deposition, recording was performed, and even if an attempt was made to copy this recording surface, the diffuse reflection of the light emitted from the copying machine was small and the light did not reach the photosensitive drum, making it virtually impossible to copy. There is a system in which a paper or sheet is sealed in a special cover so that copying cannot be performed.

As a concrete example, as a method of preventing copying, Japanese Utility Model Publication No. 5-20541 and Japanese Utility Model Publication No. 5-2054.
Using lines and halftone dots for the latent image and the background as in Japanese Patent No. 7,
There are a method of notifying that a latent image appears when copying and it is not genuine, and a method of making the surface unusable as a glossy mirror surface by metal deposition as described in JP-A-62-199899.

[0006] There are some problems when attempting to prevent confidential information leakage by copying using such a system. For example, non-copyable paper is very different from the surface form of ordinary plain paper, and it is extremely difficult to read in practice, or the surface of non-copyable paper has no addition or remarkably bad writing property. It was hard to say that the system was sufficiently easy to use, with equipment and devices required.

That is, in the case where the surface is a glossy mirror surface, there is a problem that the information written on the essential surface is difficult to read due to its glossiness and the printability is low. When used, a copy can be shown as textual information in the copy, but the original has a pattern such as the tint block printing used for railroad tickets printed in considerable depth. However, there is a problem in that the characters are difficult to read and the latent image does not fit properly on the paper unless it is of a certain size.

As a precedent for sticking a support and transparent paper, Japanese Patent Publication No. 62-28465 discloses a transparent synthetic resin film on which both sides of ultrathin paper are laminated, and the ultrathin paper is made of thermoplastic synthetic resin. The method of impregnation is described in
Further, Japanese Patent Application Laid-Open No. 4-18200 describes a method of superposing a Japanese paper on one side or both sides of a plastic film with an adhesive interposed therebetween and performing a super calender treatment. All of these are intended for use as recording paper, but not for non-copyable paper.

[0009]

SUMMARY OF THE INVENTION Therefore, the problem to be solved by the present invention is that the non-copyable paper has an appearance similar to that of general paper, and printing, copying, writing, etc. on the non-copyable paper. The purpose is to supply a non-copyable sheet which can be processed and which makes the copied information unreadable even if the information written on the non-copyable sheet is copied by a copying apparatus.

[0010]

The inventors of the present invention have made the following inventions as a result of earnest research for solving the above problems. That is, 1) a paper support, 2) metal vapor deposition on a synthetic resin film, and then an adhesive resin layer containing a cut and subdivided cut vapor deposition film, and 3) transparent paper, which are laminated in this order It is the invention of paper.

The transparent paper of the present invention is preferably a transparent paper having a transparency of 65% or more produced by using cellulose fibers.

The basis weight of the transparent paper of the present invention is 10 to 45 g /
It is preferably m ² .

The transparent paper of the present invention is preferably either tracing paper, impregnated tracing paper, or Japanese paper.

The non-copyable paper of the present invention will be described in detail below. The non-copyable paper of the present invention has the same whiteness, printability, writing suitability and copyability as plain paper because the surface is a base paper. However, due to the high light reflectance of the cut vapor deposition film contained in the non-copyable paper, when the information on the non-copyable paper is copied, the irradiation light of the light source of the copying machine is specularly reflected by the cut vapor deposited film. As a result, the specular reflection light is detected and identified by the light receiving sensor of the copying machine, the cut vapor deposition film portion appears as a black dot on the copy surface, the information on the non-copyable paper becomes unreadable, and the copied side. Provides non-copyable paper that can be clearly identified as a copy. Of course,
In order to effectively suppress the psychological effects of copying, notations, marks, embosses, watermarks, etc. are introduced on a part of non-copyable paper,
It can be distinguished from other plain paper.

In the present invention, the transparency is expressed by 100- (opacity value). The opacity value is JIS P 81.
It is the opacity (%) measured by the A method of 38. The thickness is a value measured by the method for testing the thickness and density of JIS P 8118 paper and paperboard.

In the present invention, paper having a transparency of 65% or more is called transparent paper. The transparent paper used in the present invention is not particularly limited as long as it has a transparency of 65% or more, such as glassine paper, resin-impregnated paper, typewriter paper, condenser paper, tracing paper, impregnated tracing paper, or Japanese paper. However, tracing paper, impregnated tracing paper, or Japanese paper, among others, is suitable.

The transparent paper having a transparency of 65% or more is suitable as a laminating material that takes advantage of the light reflectivity of the cut vapor deposition film and exerts its copy-preventing effect. When the transparency is lower than 65%, the cut vapor deposition film has a transparency. Since the surface is not glossy, the anti-copying effect is low and it is unsuitable.

The tracing paper or the impregnated tracing paper referred to here is described as follows according to the latest paper processing handbook (Tec Times, published August 20, 1988). “Natural trepe is a tracing paper that takes into consideration the trace work and diazo copy work when it comes to original drawing paper. Tracing paper is transparent paper. The reason why paper is opaque and white is that general high-quality paper contains about 50% air in its volume. The paper looks white and becomes opaque due to the distribution of minute voids and the difference in refractive index between cellulose fibers and air.
There are two types of tracing paper, natural trepe and impregnated trepe. Natural trepe is a paper made by making pulp fibers highly beaten to reduce voids to 15 to 25%. On the other hand, the impregnated trepe is a transparent paper obtained by impregnating general high-quality paper with a transparent resin having the same refractive index as that of cellulose. , "For tracing paper, thin articles of 40 to 60 g / m ² are used for office work, and 55 g / for design drawing and second original drawing.
m ² or more is used. ].

Furthermore, the new edition encyclopedia (edited by the Japan Printing Association)
The Ministry of Finance Printing Bureau's section on transparent paper states, "A type of thin, transparent writing paper. The original image is shown as a transparent copy and used for manuscripts such as the Bandaiq method and blueprints. There are two types, 1) is a raw material that is beaten to a highly viscous state so as to be transparent, or a processed paper that is made transparent by applying a mixture of Canadian balsam, turpentine oil, vegetable oil, etc. to thin paper. 2) is thin-leaf Japanese paper made by the flow drop method using Kozo and Mitsumata. Also called drawing paper. ] Is described.

According to the Paper and Pulp Technology Handbook (1982, Japan Pulp and Paper Technology Association), "general term for thin leaf, various types such as dictionary paper, rice paper, type paper, and printing paper are used, and the basis weight is 40 g / m ² or less. in, thin leaf paper is 20g / m ²
It is the following. ] Is described.

Based on the above description, in the present invention, for the sake of convenience, a paper having an appropriate transparency of 65% or more is referred to as a transparent paper as a bonding material which cannot be copied by specular reflection by a cut vapor deposition film. Above all, the transparent paper of the present invention preferably has a basis weight of 10 to 45 g / m ² . The transparent paper of the present invention includes wood pulp, synthetic pulp, filler, sizing agent,
Raw materials commonly used in papermaking, such as paper-strengthening agents and dyes, can be used as necessary. For the transparent paper of the present invention, tracing paper, impregnated tracing paper, or Japanese paper can be preferably used. The tracing paper referred to in the present invention is a transparent paper which is also called natural trepe or natural trepe.

In the use of the present invention, when the basis weight of the transparent paper is less than 10 g / m ² , the dimensional stability is poor and wrinkles are easily formed during lamination, and the paper is torn when writing with a pen plotter or the like. Is not preferred. On the other hand, the basis weight is 4
If it is larger than 5 g / m ^2, the thickness after laminating becomes thicker,
It is not preferable because the suppleness of the paper is eliminated, the light reflectance of the most important cut vapor deposition film is lowered, and it becomes inconspicuous on the copy, and the non-copying effect is lowered.

As the paper support used in the present invention, ordinary natural pulp paper such as high-quality paper, cast paper and coated paper is used. An aqueous coating layer or the like may be provided for the purpose of suppressing seepage of the adhesive resin. Although deviating from the term non-copyable paper, a so-called synthetic paper, which is a pseudo paper made of synthetic fiber or synthetic resin film, or an inorganic sheet such as a glass fiber sheet can be used as a paper support.

The cut vapor deposition film used in the present invention is
Generally, it refers to a film obtained by subdividing a metal-deposited film having a protective layer provided on one surface or both surfaces thereof, if necessary. The protective layer may be colorless or colored, but is preferably transparent from the viewpoint of ensuring the reflectivity of copying light.

The metal vapor-deposited film is, for example, as shown on pages 12 to 17 of the magazine Convertec September 1987, or pages 57 to 66 of Convertec July 1988, the base material is Polyester (PET), nylon, polyvinyl chloride, polycarbonate, non-stretched polypropylene, stretched polypropylene, polyethylene, and in some cases, paper is used, and most of the metal evaporated is aluminum, but gold, silver, copper, chromium. , Indium, tin, etc. are used. The cut metal vapor deposition film may be referred to as a cut vapor deposition film or a cut vapor deposition film under the trade name (for example, a product of Tokyo Reiko Co., Ltd.).

The grain size of cutting is about 300 mesh to 50 mm, and any shape such as square, rectangle, rhombus, circle, ellipse, fiber, hair, star, triangle, or irregular shape can be used. It doesn't matter. To be precise, when the cut vapor-deposited film is made by a punching method from a metal vapor-deposited film instead of a cut, it may be called by the name of sequin, but in the present invention, the cut metal-deposited film is collectively referred to as the cut metal-deposited film. Is called. Naturally, these cut vapor deposited films are
It is possible to mix and use various kinds of materials having different shapes, colors and materials. It is preferable in terms of finish that the thickness of the cut vapor deposition film is about 4 to 20 μm.

The adhesive resin constituting the adhesive resin layer in the present invention is not particularly limited as long as it is an adhesive or pressure-sensitive adhesive generally used in the paper field, that is, the resin used is a rubber-based adhesive resin, Synthetic rubber adhesive resin, modified rubber adhesive resin, polyvinyl acetate resin adhesive resin, polyurethane resin adhesive resin, nitrocellulose adhesive resin, polyester resin adhesive resin, urea resin adhesive resin, phenol resin adhesive resin, Melamine resin adhesive resin, resorcinol adhesive resin, polyvinyl alcohol adhesive resin, sodium silicate adhesive resin, epoxy resin adhesive resin, cyanoacrylic resin adhesive resin, acrylic resin adhesive resin, silicone resin adhesive resin, Saturated polyester resin adhesive resin, ethylene / vinyl acetate adhesive resin,
Polyamide resin-based adhesive resin, aliphatic or aromatic polyurethane-based adhesive resin, copolymerized nylon-based adhesive resin and the like are used, but polyurethane-based adhesive resin is preferably used in terms of adhesive strength, heat resistance and the like. The adhesive resin may be applied in an organic solvent type, an aqueous solution type, an emulsion type, a reaction curing type, or a hot melt type. The adhesive resin and the cut vapor-deposited film may be mixed by any method such as stirring, continuous administration, and spraying.

A radiation-curable resin may be used as the adhesive resin forming the adhesive resin layer in the present invention. In the present invention, the electron beam curable resin and the ultraviolet curable resin are collectively referred to as a radiation curable resin. As the radiation curable resin used in the present invention, unsaturated polyester having a radical polymerization curable functional group at the molecular end or in the molecular side chain, modified unsaturated polyester, an acrylic polymer and a polymer having an ethylenically unsaturated bond, The monomers and the like can be used alone or together with other solvents. It can be roughly classified as follows regardless of the number of radiation-curable functional groups.

(1) Aliphatic, alicyclic, aromatic, araliphatic polyhydric alcohol and (meth) acrylate of (poly) alkylene glycol (2) Aliphatic, alicyclic, aromatic, araliphatic (Meth) acrylate of polyhydric alcohol obtained by adding alkylene oxide to polyhydric alcohol of (3) (poly) ester (meth) acrylate (4) (poly) urethane (meth) acrylate (5) epoxy (meth) acrylate ( 6) (Poly) amide (meth) acrylate (7) (meth) acryloyloxyalkyl phosphate ester and salts thereof (8) Vinyl-based or diene-based compound having a (meth) acryloyloxy group at the side chain or terminal (9) ) Monofunctional (meth) acrylate, vinylpyrrolidone, (meth) acryloyl compound (10) Ethylenically unsaturated bond (11) Mono- or polycarboxylic acids having an ethylenically unsaturated bond, and their alkali metal salts, ammonium salts, amine salts, etc. (12) Vinyllactam and polyvinyllactam compounds (13) Acrylamide compounds (14) ) (Poly) ether having an ethylenically unsaturated bond and its ester (15) Ester of alcohol having an ethylenically unsaturated bond (16) Polyalcohol having an ethylenically unsaturated bond and its ester (17) Styrene, divinylbenzene Aromatic compound having one or more ethylenically unsaturated bonds (18) (Poly) organosiloxane compound having a (meth) acryloyloxy group at the side chain or terminal (19) Silicone having an ethylenically unsaturated bond Compound (20) Amino modification Or a carbamate-modified (meth) acrylate (21) A multimer or oligoester (meth) acrylate-modified product of the compounds described in (1) to (20) above. These resins may be used alone or in combination. You may use it.

The adhesive resin and the cut vapor-deposited film may be mixed by any method such as stirring, continuous administration, and spraying.

The coating amount of the adhesive resin is not limited, but it is preferably in the range of ^{2 to} 30 g / m ^{2 for} the purpose of maintaining sufficient adhesive strength between the transparent paper and the paper support. If the coating amount of the adhesive resin is less than this range, the adhesiveness is insufficient, and if it exceeds this range, not only does it not contribute to the improvement of the adhesiveness, but also the non-copyability may be deteriorated from the viewpoint of the decrease in transparency. The adhesive resin may be colorless or colored from the viewpoint of not reducing the light reflectivity of the cut vapor deposition film, but is preferably as transparent as possible. The amount of the cut vapor deposition film contained in the adhesive resin is
Although it should be judged based on the design and the copying condition,
The weight ratio is preferably 0.05 to 20%. If the content of the cut vapor deposition film is less than this range, the effect as a non-copyable paper is poor, and if it is more than this range, the adhesiveness may decrease.

As a method of applying the adhesive resin containing the cut vapor deposition film of the present invention, a gravure coater,
Gravure offset coater, bar coater, roll coater, air knife coater, U comma coater, AK
KU coater, smoothing coater, micro gravure coater, reverse roll coater, 4 or 5 roll coater, blade coater, dip coater,
Any coater such as a falling curtain coater, a slide coater, a die coater, and a squeeze coater may be used. A drop curtain coater is suitable when the grain size of the cut vapor deposition film is large.

The electron beam irradiation used for curing the electron beam irradiating resin in the present invention has an accelerating voltage of 100 to 1000 KV, more preferably 100, from the viewpoint of transmission power and curing power.
It is preferable to use an electron beam accelerator of up to 300 KV so that the absorbed dose in one pass is 0.5 to 20 Mrad.
If the accelerating voltage or the electron beam irradiation dose is lower than this range, the electron beam penetrating power is too low to perform sufficient curing, and
If the amount is larger than this range, not only the energy efficiency is deteriorated, but also unfavorable influences on the quality such as decomposition of transparent paper, resin, additives, coloring, strength reduction and the like appear.

The electron beam accelerator may be, for example, an electro curtain system, a scanning type, a double scanning type or the like.

During electron beam irradiation, if the oxygen concentration is high, the curing of the electron beam curable resin is hindered, so replacement with an inert gas such as nitrogen, helium, carbon dioxide, etc. is carried out, and the oxygen concentration is 600 ppm or less. Preferably 400 pp
Irradiation is preferably performed in an atmosphere suppressed to m or less.

In the present invention, the radiation-curable resin can be cured by irradiation with ultraviolet rays, if necessary. Examples of the ultraviolet irradiation device used include a low pressure mercury lamp, a medium pressure mercury lamp, a high pressure mercury lamp, and a metal halide lamp.
There is also an ozoneless type that produces less ozone. Generally, a plurality of lamps having an output of 80 w / cm or more are used in parallel.

In the present invention, as the photoinitiator used for curing by ultraviolet irradiation, acetophenones such as di- and trichloroacetophenone, benzophenone, Michler's ketone, benzyl, benzoin,
There are benzoin alkyl ether, benzyl dimethyl ketal, tetramethyl thiuram monosulfide, thioxanthones, azo compounds and the like, and they are selected from the viewpoints of the type of curing reaction of the curable resin, stability, suitability with an ultraviolet irradiation device and the like. The amount of the photoinitiator used is usually in the range of 0.1 to 5% with respect to the ultraviolet curable resin. Further, a storage stabilizer such as hydroquinone may be used in combination with the photoinitiator.

Examples of the sensitizer used in the present invention include aliphatic amines, aromatic group-containing amines, nitrogen heterocyclic compounds,
Allyl urea, O-tolylthiourea, sodium diethyldithiophosphate, soluble salts of aromatic sulfinic acid,
Photo-initiated with N, N-disubstituted-P-aminobenzonitrile compounds, tri-n-butylphosphine, sodium diethylthiophosphate, Michler's ketone, N-nitrosohydroxylamine derivatives, oxazoline compounds, carbon tetrachloride, hexachloroethane, etc. In general, the curing rate can be improved by sharing it with the agent.

[0039]

Since the non-copyable paper of the present invention has a structure in which a cut vapor deposition film having high light reflectivity is sandwiched between transparent papers, the light emitted from the light source of the copying machine is copied by the cut vapor deposition film during copying. It is specularly reflected, and as a result, the specularly reflected light is detected and identified by the light receiving sensor of the copying machine, and the cut vapor deposition film part appears as a black dot, so that it is not only clearly identified as a copy but also a copy. The black dots make the rendered information unreadable. Since the cut vapor deposition film itself is not exposed on the surface, the surface is smooth and the material is uniform, so that printing, writing, copying or gluing can be easily performed on non-copyable paper. Most of the material is cellulose, and since it can be handled substantially as paper, it does not need to be treated as an incombustible material.

[0040]

EXAMPLES Next, the present invention will be described in more detail by way of examples, but the contents of the present invention are not limited to the examples.

Example 1 As a cut vapor deposition film, a 12 μm thick polyethylene terephthalate film was vapor-deposited with aluminum on one side and provided with a transparent protective layer on both sides, and then was cut into 3 mm square pieces. Commercial basis weight 70 g / m as paper support
Using PPC paper of No. ² and using emulsion type adhesive resin VP-57 (manufactured by Kanebo NSC Co., Ltd.) as an adhesive resin, a cutting vapor deposition film was mixed by an amount corresponding to 1% in weight before drying, and after mixing, Apply with a direct gravure coater to a dry weight of 10 g / m ² , dry with hot air, and overlay a tracing paper with a basis weight of 10 g / m ² and a transparency of 84% as transparent paper, and cure for 2 days to obtain the desired result. I got a non-copyable paper.

Example 2 As a cut vapor deposition film, a polyethylene terephthalate film having a thickness of 12 μm was vapor-deposited on one side of the film, a colorless transparent protective layer was provided on the vapor deposition surface, and the film was subdivided into 50 mesh. Commercially available white coated paper having a basis weight of 70 g / m ² was used as the paper support, and modified acrylic copolymer resin emulsion emulsion bond CE500 (manufactured by Konishi Co., Ltd.) was used as the adhesive resin. % Of the cut vapor-deposited film is mixed and mixed, and the dry weight is 20 g /
The coating was carried out to obtain m ² and dried with hot air. As a transparent paper, a tracing paper having a basis weight of 18 g / m ² and a transparency of 80% was overlaid and cured for 2 days to obtain a target non-copyable paper.

Example 3 As a cut vapor deposition film, a polyethylene terephthalate film having a thickness of 10 μm was vapor-deposited on one side of the film, a colorless transparent protective layer was provided on the vapor deposition surface, and the film was subdivided into 0.5 mm square pieces. . Commercially available white cast paper having a basis weight of 100 g / m ² was used as the paper support, and alcohol solvent type resin KE60 (manufactured by Konishi Co., Ltd.) was used as the adhesive resin. After mixing and mixing, coat with a roll coater to a dry weight of 10 g / m ² , dry with hot air, and overlay tracing paper with a basis weight of 25 g / m ² and a transparency of 78% for 2 days. After curing, the target non-copyable paper was obtained.

Example 4 Using the same paper support and cut vapor deposition film as in Example 1,
The adhesive resin is an electron beam curable resin (Shin Nakamura Chemical Industry, A-
TMM-3), mixed with a cut vapor-deposited film in an amount corresponding to 1% by weight, coated on a paper support at a coating amount of 10 g / m ² , superposed on transparent paper, and then transferred from the transparent paper side. An electron beam was irradiated at an accelerating voltage of 200 kv to an absorbed dose of 2 Mrad to cure the electron beam curable resin to obtain the target non-copyable paper.

Example 5 Using the same paper support and cut vapor deposition film as in Example 2,
Adhesive resin was changed to electron beam curable resin (Kayarad MANDA manufactured by Nippon Kayaku Co., Ltd.), and a coating amount of 10 g / m was obtained by mixing a cut vapor deposition film in an amount corresponding to 0.5% by weight.
^After applying it to the paper support at ² and overlaying it with the transparent paper, irradiate the electron beam with an accelerating voltage of 200 kv from the transparent paper side to an absorbed dose of 1.5 Mrad to cure the electron beam curable resin. The desired non-copyable paper was obtained.

Example 6 As a cut vapor deposition film, a 10 μm-thick polyethylene terephthalate film was aluminum vapor-deposited on one side and provided with a yellow transparent protective layer on the vapor-deposited surface, which was then subdivided into 1 mm square pieces. Commercial basis weight of 10 as paper support
A UV-curable resin (made by Toagosei Kagaku Kogyo, Aronix M) is used as an adhesive resin using white cast paper of 0 g / m ²
80% of 230% by weight of a photoinitiator, manufactured by Ciba-Geigy Co., Ltd., Irgacure 651 is mixed), and a cut vapor deposition film is mixed in an amount corresponding to 2% by weight, and after mixing, the coating weight is 20 g / m with a roll coater. ^After coating and pre-ultraviolet curing to partially cure the ultraviolet curable resin to adjust the viscosity, the transparent paper is superposed on a tracing paper having a basis weight of 12 g / m ² and a transparency of 82%, 200k from above tracing paper
The resin was cured by irradiating with an electron beam at an acceleration voltage of V so that the absorbed dose was 2 Mrad to obtain the target non-copyable paper.

Example 7 Example 4 was repeated except that the adhesive resin was changed to an electron beam curable resin (a mixture of Aronix M-1210 and M150 in a weight ratio of 7: 3, manufactured by Toagosei Kagaku Kogyo Co., Ltd.). In the same manner as above, the target non-copyable paper was obtained.

Example 8 As a cut vapor-deposited film, aluminum was vapor-deposited on one surface of a polyethylene terephthalate film having a thickness of 12 μm, and a yellow transparent protective layer was provided on the vapor-deposited surface and the back surface.
What was subdivided into 0.3 mm × 5 mm was used. A white fine paper having a basis weight of 100 g / m ² was used as the paper support, and an ultraviolet curable resin (Aronix UV3400 manufactured by Toagosei Kagaku Kogyo Co., Ltd.) was applied as the radiation curable resin so that the coating amount was 10 g / m ^2. After coating and spraying the cut vapor deposition film on the resin so that the weight ratio is about 5%, superimpose it on a tracing paper with a basis weight of 12 g / m ² and a transparency of 82%, and irradiate ultraviolet rays from above the tracing paper. Then, the ultraviolet curable resin was cured to obtain the target non-copyable paper.

Example 9 A target non-copyable sheet was obtained in the same manner as in Example 1 except that the transparent paper was changed to impregnated tracing paper having a basis weight of 18 g / m ² and a transparency of 79%. It was

Example 10 In the same manner as in Example 1 except that the transparent paper was changed to Japanese paper having a basis weight of 45 g / m ² and a transparency of 65%,
The target non-copyable paper was obtained.

Example 11 In Example 1, a transparent paper was used with a basis weight of 8 g / m ² and a transparency of 8
Example 1 except changing to 4% tracing paper
In the same manner as above, the target non-copyable paper was obtained. The adhesiveness was good, but it was difficult to handle the transparent paper, and the resulting non-copyable paper had wrinkles.

Example 12 As the cut vapor deposition film, the same film as in Example 1 was used. Commercial basis weight 70 as in Example 1 as a paper support
Using g / m ² PPC paper, using emulsion type adhesive resin VP-57 (manufactured by Kanebo NSC Co., Ltd.) as an adhesive resin, mixing a cut vapor deposition film in an amount corresponding to 1% in weight before drying and mixing. After that, it was coated on a paper support with a direct gravure coater so that the dry weight was 10 g / m ² , dried with hot air, and had a basis weight of 5 as a transparent paper.
Tracing papers of 0 g / m ² and transparency of 60% were overlapped and adhered, and cured for 2 days to obtain the target non-copyable paper.

Comparative Example 1 An anchor coat layer for smoothing was provided on a cast paper having a basis weight of 157 g / m ² , and vapor deposition was carried out by a vacuum vapor deposition method using aluminum to obtain a metal layer having a thickness of 80 nm. Was formed, and a transparent protective layer was provided thereon to obtain the target non-copyable paper.

Comparative Example 2 The same cut vapor deposition film as in Example 1 was used. Commercial basis weight 70 as in Example 1 as a paper support
Using g / m ² PPC paper, using emulsion type adhesive resin VP-57 (manufactured by Kanebo NSC Co., Ltd.) as an adhesive resin, mixing a cut vapor deposition film in an amount corresponding to 1% in weight before drying and mixing. After that, it was coated on a paper support with a direct gravure coater so that the dry weight was 10 g / m ² , dried with hot air, and cured for 2 days to obtain the target non-copyable paper.

Comparative Example 3 As the cut vapor deposition film, the same film as in Example 2 was used. Commercial basis weight 70 as in Example 2 as a paper support
Emulsion type adhesive bond CE5 of modified acrylic copolymer resin type as an adhesive resin using white fine paper of g / m ²
00 (manufactured by Konishi Co., Ltd.), and the weight before drying is 0.5
% Of the cut vapor-deposited film is mixed and mixed, then coated with a roll coater to a dry weight of 20 g / m ² , dried with hot air, and laminated with a biaxially stretched polypropylene film having a thickness of 12 μm. After curing for a day, the target non-copyable paper was obtained.

Comparative Example 4 The same cut vapor deposition film as in Example 1 was used. Commercially available basis weight 45 as in Example 1 as a paper support
Using a tracing paper of g / m ^2, an electron beam curable resin (Shin Nakamura Chemical Co., A-
Using TMM-3), a cut vapor deposition film was mixed in an amount corresponding to 1% by weight, and after mixing, coating was carried out with a direct gravure coater so that the coating weight was 10 g / m ^2, and accelerated at 200 kv in a nitrogen atmosphere. 2Mr in voltage
The electron beam curable resin was cured by irradiating it with an electron beam so that the absorbed dose of ad was obtained, and a target non-copyable paper was obtained.

The non-copyable paper sheets obtained in the above Examples and Comparative Examples were all good with no adhesion failure. Moreover, the following test methods were used for evaluation, and the results are shown in Table 1.

Test method: Copyability: The obtained copy-disabled paper was displayed with arbitrary information and copied on a general PPC paper. In addition to the display information, there are black copies, and those that are easily copied are judged to be excellent, and those that are not easily copied are judged to be poor.

Printability: Printing was performed on the obtained non-copyable paper, and the printability was observed. A product having a uniform surface and capable of printing like ordinary paper was judged to have excellent printability, and a case where ink was repelled or printing was disturbed was judged to be poor printability.

Abrasion resistance: The obtained non-copyable paper was strongly rubbed with a dry gauze, and those which did not drop the cut vapor deposition were judged to have excellent abrasion resistance, and those which could be cut vapor deposited were judged to have poor abrasion resistance.

Wrinkles and irregularities: The obtained non-copyable paper is subjected to a sampling inspection, and when no wrinkles or irregularities are found, it is excellent, and wrinkles and irregularities occur at a rate of 1 sheet per 100 sheets. In addition, the case where wrinkles and unevenness were observed at a rate of more than 1 sheet per 100 sheets was judged as poor.

[0062]

[Table 1]

Evaluation: As is clear from the results of Table 1,
Since the non-copyable paper of the present invention has a structure in which a cut vapor deposition film having high light reflectivity is sandwiched between transparent papers, the light emitted from the light source section of the copying machine is specularly reflected by the cut vapor deposition film during copying. As a result, the specularly reflected light is detected and identified by the light receiving sensor of the copying machine, the cut vapor deposition film part appears as a black dot, and it is clearly discriminated that it is a copy and the copy information becomes unreadable. To do.

The non-copyable paper containing the cut vapor deposition film of the present invention has a high light-reflecting property of the cut vapor deposition film so that the light emitted from the light source part of the copying machine is specularly reflected by the cut vapor deposition film during copying. As a result, the specularly reflected light is detected and identified by the light receiving sensor of the copying machine, and the cut vapor deposition film portion appears as a black dot to make copying impossible. or,
Since the cut vapor deposition film is not exposed on the surface due to the function of the transparent paper provided above, it has excellent surface properties and excellent printability, and it is possible to write on non-copyable paper as well as plain paper. Is.

The non-copyable paper of the present invention is a combustible material as a whole because it uses only an adhesive resin that fixes the cut vapor deposition film and adheres the transparent paper to the paper support.
It does not cause environmental problems when it is discarded. Since the cut vapor deposition film is protected by the transparent paper on the surface, even if the surface is strongly rubbed, the cut vapor deposition film does not drop off or detach during printing, thereby deteriorating the printability. If the basis weight of the transparent paper is less than 10 g / m ² , the non-copying effect and the like are excellent, but it is difficult to handle, and wrinkles easily occur during production, and depending on the printing method, a part of the transparent paper is damaged during printing. There are cases.

On the other hand, in the case of the non-copyable paper having a metal layer on one side by metal evaporation as in the comparative example, the surface is a metal layer, so the printability of the surface is low, and even if printing is possible, its glossiness is high. Therefore, it becomes very difficult to read. On the other hand, even if the same cut vapor-deposited film is used, if it is used in a form exposed on the surface, if the adhesive resin is used to such an extent that it can be sufficiently adhered, the gloss of the dried and cured adhesive resin will be confused and the non-copyable paper It becomes difficult to read the information on the surface. If the adhesive resin is not sufficient, the cut vapor deposition film is particularly likely to come off due to rubbing, which is not preferable in terms of quality.
In addition, the cut vapor deposition film portion may rise during printing or the material may be different, which may result in poor printability. When the cut vapor deposition film is fixed with a synthetic resin film, such cut vapor deposition film does not fall off, but it has disadvantages such as poor printability and being treated as an incombustible material. Even when transparent paper is used, if the thickness and transparency of the transparent paper are below certain values, the light reflectance of the cut vapor deposition film may be lost, and the most important non-copying effect may be reduced.

[0067]

INDUSTRIAL APPLICABILITY The non-copyable paper of the present invention causes the light emitted from the light source of the copying machine to be specularly reflected by the cut vapor deposition film during copying due to the high light reflectivity of the cut vapor deposition film. The light is detected and identified by the light receiving sensor of the copying machine, the cut vapor deposition film portion appears as a black dot, and the copy is clearly identified. Since it is covered with transparent paper, the cut vapor deposition film peels off.
The problem of falling out does not occur. Since the transparent paper is on the surface, the surface is smooth, and printing, writing, or copying or pasting onto non-copyable paper can be easily performed. Most of the material is cellulose, and since it can be handled as paper, it does not need to be treated as an incombustible material, and environmentally friendly non-copyable paper can be obtained.

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Claims (4)

[Claims] 1. A paper support, 2) a synthetic resin film is vapor-deposited with a metal to provide a transparent protective layer, and then an adhesive resin layer containing a segmented cut vapor-deposited film and 3) a transparent paper are sequentially laminated. Non-copyable paper having the specified structure. 2. The non-copyable paper according to claim 1, wherein the transparent paper is a transparent paper manufactured by using cellulose fibers and having a transparency of 65% or more. 3. The non-copyable paper according to claim 1, wherein the basis weight of the transparent paper is 10 to 45 g / m ² . 4. The non-copyable paper according to claim 1, wherein the transparent paper is tracing paper, impregnated tracing paper, or Japanese paper.