JP5843134B2 - Copy prevention laminated material - Google Patents

Description

  The present invention relates to a copy-preventing laminated material for preventing the contents of a manuscript from being readable when copied by a copying machine.

  Conventionally, an aluminum vapor-deposited sheet made by vapor-depositing aluminum on a base sheet as a copy-preventing paper that prevents the contents of manuscript documents such as important documents and confidential documents from leaking to the outside. In addition, there is one formed by superimposing print base layers having printability.

  When a document is copied by a copying machine, the light applied to the document from the light source of the copying machine causes a mirror reflection on the aluminum vapor deposition surface, so that it is difficult for the light receiving unit to receive the light.

  For this reason, a method (Patent Document 1 and Patent Document 2) is disclosed in which the background of a copy becomes black and the contents of the original cannot be read.

  Also disclosed are a method (patent document 3 and patent document 4) using colored film sticking to a document, and a method (patent document 5) using the hue and brightness of an image part and a non-image part of the document. .

JP-A-2005-225088 JP-A-8-39730 JP 60-48065 A JP-A-64-42678 Japanese Patent Laid-Open No. 60-244588

  However, the copy prevention papers of Patent Document 1 and Patent Document 2 have a metallic luster on the surface of the paper, and when the document is viewed, the visibility of the characters and patterns of the document is inferior. In addition, when the original is copied with special function settings such as the photo mode setting and the lightest density setting of the MFP, the original information can be seen lightly and the contents can be read. There is a problem that the effect of preventing copying is insufficient.

  Further, the method using sticking of a colored film on the originals of Patent Document 3 and Patent Document 4 and the method using the hue and brightness of the image portion and the non-image portion of the document of Patent Document 5 There is a problem that the visibility of is poor.

  The present invention has been made in view of the above-described problems, and there is no problem that the character and design of the original document are inferior, the eyes are tired due to the reflection of the background and the reflection highlight of the object, and the original document. It is an object of the present invention to provide a copy-preventing laminated material in which the content of a document cannot be read even if it is copied with special function settings such as a photo mode setting and a lightest density setting of a multifunction peripheral.

The anti-copying laminate according to claim 1 is formed by sequentially providing a reflecting mirror surface layer, a polarizing ink layer, an output data layer, an adhesive layer, and a polarizing film layer on a substrate, and the polarizing ink layer has an average particle diameter of 1 μm. It is characterized by comprising a blue polarizing ink having a wavelength of 500 nm to 640 nm and containing a colored pigment dispersed below, and wherein the polarizing film layer is composed of a brown or yellow polarizing film.

The anti-copying laminated material according to claim 2 comprises a reflective mirror layer, a polarizing ink layer, an adhesive layer, a polarizing film layer, and an output data layer sequentially provided on a substrate, and the polarizing ink layer has an average particle diameter of 1 μm. It is characterized by comprising a blue polarizing ink having a wavelength of 500 nm to 640 nm and containing a colored pigment dispersed below, and wherein the polarizing film layer is composed of a brown or yellow polarizing film.

The anti-copying laminate according to claim 3 comprises a reflective mirror layer, a polarizing ink layer, an adhesive layer, a polarizing film layer, and an output data layer sequentially provided on a substrate, and the polarizing ink layer has an average particle diameter of 1 μm. It is characterized by comprising a red polarizing ink having absorption between wavelengths of 460 nm to 570 nm, including a colored pigment dispersed below, and the polarizing film layer comprising a black polarizing film.

  In the present invention, a laminated material provided with a polarizing ink layer having absorption at a specific wavelength, which includes at least a reflecting mirror surface layer and a color pigment dispersed in an average particle diameter of 1 μm or less on the substrate, or on the polarizing ink layer In addition, the laminated material provided with the polarizing film layer provides excellent document visibility and eliminates the problem of eye fatigue due to the reflective mirror surface of the base and the reflective highlight of the object.

  Further, even when the original is copied with special function settings such as the photo mode setting and the lightest density setting of a monochrome multifunction peripheral or a color multifunction peripheral, the contents of the original cannot be read. That is, it is possible to provide an anti-copying laminated material having utility value as a material for preventing confidential leakage.

A reference example of a copy prevention laminated material A group is shown, and is a cross-sectional view of the laminated material. The Example of the anti-copying laminated material B group of this invention is shown, It is sectional drawing of this laminated material. The Example of the copy prevention laminated material C group of this invention is shown, It is sectional drawing of this laminated material.

An embodiment of a copy-preventing laminated material in the present invention will be described.
In the present invention, as the substrate, paper such as natural paper or synthetic paper, plastic film, or the like can be used.

  Specific examples of the plastic film include films made of polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, polyethylene terephthalate, polycarbonate, nylon, polystyrene, ethylene vinyl acetate copolymer, ionomer, etc. The material that can travel can be selected as appropriate.

  In the present invention, the reflecting mirror surface layer has a gloss on the surface of the substrate, and may be made of either metal or nonmetal, but is preferably made of metal. The metal is preferably gold, silver, copper, aluminum, nickel, titanium, a chromium alloy (stainless steel), or an alloy containing these. In particular, gold, silver, copper, aluminum, and alloys containing these are preferable because of excellent visibility and anti-copying effects.

  Examples of the nonmetal include wood, resin, glass, tile, stone, paper, and silk thread.

  In addition, when the base material itself is provided with a glossy surface, it can be used as it is as a reflecting mirror surface layer. For example, aluminum foil, aluminum vapor-deposited paper, gold foil, silver foil, copper foil, chrome foil and the like can be mentioned.

  The method for forming the mirror surface layer on the substrate is not particularly limited, and examples thereof include metal deposition, metal plating, metal bonding, metal kneading, sputtering, and metal coating.

  In the present invention, the polarizing ink is colored by being laminated on a material having a mirror surface in the lower layer, and the pigment used is composed of a colored pigment having an average particle diameter of 1 μm or less. Due to the action of this pigment, the reflected light is controlled, and the resulting polarizing ink has a characteristic that lightness attenuation and color change occur.

  Polarized ink can create various colors such as single colors such as white, black, blue, red and yellow, and intermediate colors mixed with colors.

  As a method for laminating the polarizing ink, a known printing method such as screen printing, offset printing, and gravure printing, and a coating method such as a bar coating method, a gravure method, and a roll coating method can be used, but offset printing is preferable. .

  As a polarizing ink in the present invention, a red polarizing ink having a wavelength between 460 nm and 570 nm, preferably having absorption peaks at wavelengths of 505 nm and 545 nm, and a red pigment dispersed in an average particle diameter of 1 μm or less, a wavelength of 500 nm Blue polarized ink having a absorption between ˜640 nm, preferably having absorption peaks at wavelengths of 570 nm and 640 nm, and a blue pigment dispersed in an average particle diameter of 1 μm or less, or red polarized ink / blue polarized ink = 1 / 1, purple polarized ink mixed at a ratio of red polarized ink / blue polarized ink = 1/2.

In addition, a red pigment and a blue pigment can be used from any of the following.
Examples of red pigments include C.I. l. Pigment Red 1, 2, 3, 7, 9, 14, 41, 48: 1, 48: 2, 48: 3, 48: 4, 81: 1, 81: 2, 81: 3, 97, 122, 123, 146, 149, 168, 177, 178, 179, 180, 184, 185, 187, 192, 200, 202, 208, 210, 215, 216, 217, 220, 223, 224, 226, 227, 228, 240, 246, 254, 255, 264, 272, 279, and Bengala. Examples of the blue pigment include C.I. l. Pigment Blue 15, 15: 1, 15: 2, 15: 3, 15: 4, 15: 6, 16, 22, 60, 64, 80.

  In the present invention, examples of the adhesive layer used for laminating the polarizing film include acrylic, urethane, and epoxy adhesive resins and adhesive resins.

The amount of lamination of the adhesive layer may be any solid adhering amount 0.5 g / ^{m 2} or more, more preferably 0.5 to 10 g / ^{m 2.} When it becomes smaller than 0.5 g / m ^2, there is a problem that causes poor adhesion such as peeling, and when it becomes larger than 10 g / m ^2, there is a problem that it causes poor running during printing.

  As the method for laminating the adhesive layer, a known printing method such as screen printing, offset printing, and gravure printing, and a coating method such as a bar coating method, a gravure method, and a roll coating method can be used. Is preferred.

  In the present invention, the polarizing film is a transparent film mainly having a polarization performance of dyeing / adsorbing iodine or dye on polyvinyl alcohol (PVA), stretching / orienting, and passing only polarized light in a certain vibration direction. Mention may be made of black, purple, blue, brown, yellow and light red polarizing films.

  Specific examples of the present invention are described below. In addition, this invention is not limited to an Example, In the range which does not deviate from the meaning of this invention, it can change suitably.

Reference example 1

FIG. 1 is a cross-sectional view showing a reference example of a laminated material (hereinafter referred to as group A) in which a reflecting mirror layer, a polarizing ink layer, and an output data layer are sequentially provided on a substrate. A commercially available silver mirror surface sheet 10 having a mirror layer on a base material (manufactured by Lintec Co., Ltd .: Super Stick label FNS gloss) and red polarized ink (manufactured by KF Trinity Co., Ltd .: Luminist (registered trademark) UWR-182SH) Was obtained by laminating a red polarizing ink layer 20 corresponding to a solid adhesion amount of 4 g / m ² by 100% DUTY offset printing. Next, on the same base material, only the red polarization ink layer 20 of the laminate A-1 was laminated as a blue polarization ink layer 20 (KF Trinity Co., Ltd .: Luminist (registered trademark) UWB-108SHS). Laminate A-2 which is a purple-polarized ink layer 20 in which only the red polarized ink layer 20 of the laminate A-1 is mixed at a ratio of the red polarized ink / the blue polarized ink = 1/1. 3. Laminate A-4 was prepared as a purple-polarized ink layer 20 mixed at a ratio of red-polarized ink / blue-polarized ink = 1/2.

  The output data layer 30 was printed on the upper surface of the laminated materials A-1 to A-4 with a laser printer (monochrome) to obtain originals A-1 to A-4. These document visibility was visually determined and the results are shown in Table 1.

Figure 2 shows the reflective mirror layer onto a substrate according to claim 1, polarization ink layer, the output data layer, adhesive layer, an example of a polarizing film layer sequentially formed laminated material (hereinafter referred to as Group B) It is sectional drawing. An adhesive of acrylic resin is applied to the laminate A-2 using the blue polarized ink described in Reference Example 1 on the original A-2 on which the output data layer 30 is printed, by a bar coating method. A laminated material B-1 in which an adhesive layer 40 coated with 0.0 g / m ² and a violet polarizing film layer 50 was laminated thereon was obtained.

  Next, only the purple polarizing film layer 50 of the laminate B-1 was used as a laminate B-2 that was a blue polarizing film layer 50, a laminate B-3 that was a brown polarizing film layer 50, and a yellow polarizing film layer 50. A laminated material B-5, which was a laminated material B-4 and a thin red polarizing film layer 50, was obtained. The visibility of these laminated materials B-1 to B-5 was determined visually, and the results are shown in Table 1.

FIG. 3 shows a laminate (hereinafter referred to as “C group”) in which a reflective mirror surface layer, a polarizing ink layer, an adhesive layer, a polarizing film layer, and an output data layer are sequentially provided on the base material according to claim 2 or claim 3 . It is sectional drawing which shows an Example. Adhesive layer 40 in which an acrylic resin adhesive is applied to the laminate A-1 using the red polarizing ink described in Reference Example 1 by a bar coating method, corresponding to a solid adhesion amount of 5.0 g / m ² , A laminated material C-1 having a black polarizing film layer 50 laminated thereon was prepared.

Further, an adhesive layer 40 in which an acrylic resin adhesive was applied to the laminate A-2 using the blue polarizing ink described in Reference Example 1 by a bar coating method, corresponding to a solid adhesion amount of 5.0 g / m ^2. Then, a laminated material C-2 in which a purple polarizing film layer 50 was laminated thereon was prepared. Further, only the purple polarizing film layer 50 of the laminated material C-2 is a laminated material C-3 which is a blue polarizing film layer 50, a laminated material C-4 which is a brown polarizing film layer 50, and a laminated material which is a yellow polarizing film layer 50. A laminated material C-6 having a material C-5 and a thin red polarizing film layer 50 was obtained.

  Output data 30 was printed on the upper surface of the laminated materials C-1 to C-6 by a laser printer (monochrome) to obtain originals C-1 to C-6. These document visibility was visually determined and the results are shown in Table 1.

(Comparative example)
On the upper surface of a commercially available copy-preventing sheet having a mirror layer on the substrate, output data was printed with a laser printer (monochrome) to prepare a manuscript. This document visibility was visually determined, and the results are shown in Table 1.

For evaluation of the anti-copying effect, each original document prepared in Reference Example 1, Examples 1 to 2 and Comparative Example is set to a normal mode of a monochrome multifunction machine (manufactured by Sharp Corporation: monochrome multifunction machine MX-M423F) / normal. Black and white copy with density setting, photo mode setting / lightest density setting, color copy (color multifunction machine DocuCenter C2101 manufactured by Fuji Xerox Co., Ltd.), photo mode setting / lightest density setting color copy It was. The legibility of the manuscript contents of these copies was judged visually and the results are shown in Table 1.

  The results of the document visibility evaluation in Table 1 are as follows. Characters of the document, the visibility of the pattern, the reflection of the background and the reflection highlight of the object are visually observed. The reflection highlight of the object and the reflection highlight of the object does not get tired. ×: The visibility of the characters and the pattern of the original is inferior, and the eye gets tired by the reflection of the background and the reflection highlight of the object.

  The result of evaluating the anti-copying effect is that the copy is visually observed, ○: the document data content cannot be read, △: the original data appears to be shadowed but the content cannot be read, ×: the document data content is read It was evaluated in three stages: what can be done.

  The comparative document corresponding to the prior art in which output data is printed on a base material having a mirror surface layer has poor visibility and tired eyes because the reflected light from the mirror surface other than the printing portion is strongly dazzling. In addition, the copy of the original could not be read at the normal copy density of the monochrome copy because of the copy prevention effect due to reflection on the mirror surface layer, but the monochrome copy photo mode setting / lightest density, color copy photo At the mode setting / lightest density, the copy prevention effect was insufficient and the contents of the original data could be read.

In all of the documents in groups B and C created in Examples 1 and 2 , the reflected light from the mirror surface was reduced in brightness, and as a result, documents with good visibility and less eye fatigue were obtained. The visibility of a document using the anti-copying laminate of the present invention is due to the effect of lightness reduction and color change when passing through a polarizing ink layer or a polarizing ink layer + polarizing film layer.

  Regarding the evaluation of the anti-copying effect, the red-polarized ink layer (A-1) and the blue-polarized ink layer (A-2) in group A, the blue-polarized ink layer + purple-polarized film layer (B-1) in group B, blue Polarized ink layer + blue polarized film layer (B-2), blue polarized ink layer + thin red polarized film layer (B-5), blue polarized ink layer + purple polarized film layer (C-2) in group C, blue polarized The ink layer + blue polarizing film layer (C-3) and blue polarizing ink layer + thin red polarizing film layer (C-6) have insufficient anti-copying effects, and the original data as in the comparative example corresponding to the prior art. I was able to interpret the contents.

  Blue polarization ink layer + brown polarization film layer (B-3), blue polarization ink layer + yellow polarization film layer (B-4) in group B, red polarization ink layer + black polarization film layer (C-1) in group C The blue polarizing ink layer + brown polarizing film (C-4) and the blue polarizing ink layer + yellow polarizing film layer (C-5) have sufficient anti-copying effects, and the contents of the original data cannot be read. confirmed.

  It was confirmed that some of the laminated materials in Group A had a copy-preventing effect depending on the color of the polarizing ink layer. In other words, effects such as lightness reduction and color change due to polarization ink affect copy prevention. Among them, A-3 and A-4 red polarization ink and blue polarization ink were mixed and created. It has been found that the violet polarized ink sufficiently satisfies the copy prevention effect.

  In the laminated materials in Group B and Group C, when output data is printed on the polarizing ink layer and then an adhesive layer + polarizing film layer is provided, and an adhesive layer + polarizing film layer is provided on the polarizing ink layer. After the output data is printed, there is a difference in the stacking order, but the red polarizing ink layer and the black polarizing film layer, the blue polarizing ink layer and the brown polarizing film layer, the blue polarizing ink layer and the yellow polarizing film layer. It has been found that the laminate material combined with the above has an excellent anti-copying effect.

10 Silver base material (base material + mirror surface layer)
20 Polarized ink layer 30 Output data layer 40 Adhesive layer 50 Polarized film layer

Claims (3)

  A reflective mirror surface layer, a polarizing ink layer, an output data layer, an adhesive layer, and a polarizing film layer are sequentially provided on a substrate, and the polarizing ink layer contains a color pigment dispersed in an average particle diameter of 1 μm or less, and has a wavelength of 500 nm. An anti-copying laminate comprising a blue polarizing ink having absorption between ˜640 nm, and the polarizing film layer comprising a brown or yellow polarizing film.   A reflective mirror surface layer, a polarizing ink layer, an adhesive layer, a polarizing film layer, and an output data layer are sequentially provided on a substrate, and the polarizing ink layer contains a color pigment dispersed in an average particle diameter of 1 μm or less, and has a wavelength of 500 nm. An anti-copying laminate comprising a blue polarizing ink having absorption between ˜640 nm, and the polarizing film layer comprising a brown or yellow polarizing film.   A reflective mirror surface layer, a polarizing ink layer, an adhesive layer, a polarizing film layer, and an output data layer are sequentially provided on a substrate, and the polarizing ink layer contains a color pigment dispersed in an average particle diameter of 1 μm or less, and has a wavelength of 460 nm. An anti-copying laminate comprising a red polarizing ink having an absorption between ˜570 nm and the polarizing film layer comprising a black polarizing film.

Images