JP2002067480A - Recording sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording sheet, which can be prevented from being forged. SOLUTION: A base material 11 is made of a colorless transparent PET sheet. Onto the surface of the base material 11, a colorless transparent accepting layer 12 having an acceptability is laminated. Onto the rear surface of the base material 11, a displaying layer 21, through which a display is actualized on the surface of the transparent accepting layer, is laminated. In addition, the displaying layer 21 consists of a printing part 22 and a special visual effect layer 23 containing elements developing special visual effects. The special visual effect layer 23 includes a pearl pigment. On the rear surface of the displaying layer 21, a white lining layer 31 is laminated. Onto the rear surface of the lining layer 31, a sticky layer 41, with which the recording sheet 1 is releasably stuck to an object matter such as a desk, a wall or the like, is formed. Further, the sticking layer 41 is covered with a laminated film 51.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording sheet which can be printed using an ink jet printer.

[0002]

2. Description of the Related Art In the past, certificates for certifying facts and qualifications, such as certificates of diplomas, certificates of commendation, certificate of appreciation, and pedigrees, are displayed on a base paper on which predetermined items are described in advance, and the name and the date of issuance are changed individually. It was created by printing.

[0003]

However, such a certificate could be easily forged, for example, by copying it with a copying machine.

In order to prevent this, it is conceivable to perform color printing. Even in this case, forgery can be easily performed by using a color copying machine.

The present invention has been made in view of such conventional problems, and has as its object to provide a recording sheet capable of preventing forgery.

[0006]

According to a first aspect of the present invention, there is provided a recording sheet according to the present invention.
A sheet-shaped substrate having transparency, a transparent receiving layer laminated on the surface of the substrate, having transparency and having acceptability for inkjet ink, and a transparent receiving layer laminated on the back surface of the substrate; A display layer that makes a display visible on the surface of the layer.

That is, on the surface of the recording sheet,
Since the transparent receiving layer having receptivity to the inkjet ink is formed, printing using the inkjet ink becomes possible. Further, on this surface, a display of a display layer is made obvious, and this display is formed in a lower layer of the base material.

Further, the recording sheet according to the second aspect of the present invention includes a backing layer further laminated on the back surface of the display layer.

Thus, the surface of the display layer is protected by the base material, and the back surface is protected by the backing layer.

Further, in the recording material sheet according to the third aspect,
The backing layer was formed by an opaque layer.

As a result, the display with the opaque backing layer as a background becomes apparent on the surface of the recording sheet. The back surface of the display layer is concealed by a backing layer.

[0012] In addition, in the recording sheet according to the fourth aspect, the display layer produces a special visual effect such as a metallic pigment, a pearl pigment, a fluorescent pigment, a black light pigment, a hologram pigment, a luminous pigment, or a temperature indicating capsule. Contains the element.

That is, on the surface of the recording sheet, a display of a display layer that produces a special visual effect that cannot be copied by a color copying machine or printed by a printer is made obvious.

In the recording sheet according to the fifth aspect, a sheet-like base material and a metallic pigment, a pearl pigment, a fluorescent pigment, a black light pigment, a hologram pigment, a thermosetting capsule and the like are laminated on the surface of the base material. A special visual effect receiving layer containing an element that generates a special visual effect and having receptivity to ink-jet ink.

That is, on the surface of the recording sheet,
Since the special visual effect receiving layer having receptivity to the inkjet ink is formed, printing using the inkjet ink becomes possible. In addition, this special visual effect receiving layer contains an element that generates a special visual effect such as a metallic pigment, a pearl pigment, a fluorescent pigment, a black light pigment, a hologram pigment, a luminous pigment, or a temperature indicator capsule. It produces a special visual effect color that cannot be copied or printed on a printer.

Here, polyvinyl acetal can be used for forming the transparent receiving layer of claim 1 and the special visual effect receiving layer of claim 5 in the present invention. Polyvinyl acetal has excellent ink jet print receiving performance, as described in Japanese Patent Publication No. 5-23597. In particular, the present invention is characterized in that it has a water resistance such that it does not bleed even when water is dropped on a received image of the ink jet ink at the same time as it receives the water-based ink jet ink clearly.

Of course, the resin having receptivity to the ink-jet ink is not limited to polyvinyl acetal, but may be a specially modified acrylic emulsion, an ethylene-vinyl acetate copolymer resin, a special urethane resin, a polyvinyl alcohol resin, or the like.

The above-mentioned metallic pigment, pearl pigment,
Fluorescent pigments, black light pigments, hologram pigments, luminous pigments, and temperature indicating capsules are commonly used.

Examples of the metallic pigment include gold powder Tenjin-in 2L5 (manufactured by Fukuda Metal Foil Powder Industry Co., Ltd.), gold powder No. 33
(Kyoto Bronze), Alpaste 1200N, F
M1200 (manufactured by Toyo Aluminum Co., Ltd.).

Examples of pearl pigments include Irio
din 121, 201, 211, 221, 22
3, 201WII and 201WNT (manufactured by Merck Japan Ltd.).

Examples of fluorescent pigments include Sinloich SW-17, SW-37, FA-204 and FA-204.
41 and FZ-5005 (manufactured by Shinloich Co., Ltd.).

Examples of the black light pigment include:
There are phosphor GOF-B (manufactured by Nemoto Special Chemical Co., Ltd.), BM phosphor, BG-51 phosphor, R phosphor, and RED-B phosphor (manufactured by Tokyo Chemical Laboratory).

Examples of hologram pigments include diamond holograms HG-20 and HG-S (manufactured by Diamond Industries, Ltd.), 256 Geometric Pigme.
ntSilver, Gold, Pepper (Sp
ectratek Technologies. inc
Made).

Examples of the luminous pigment include N-night light G-
210F, G-300F, G-300FF, G-
300M and G-300C (both manufactured by Nemoto Special Chemical Co., Ltd.).

Further, as an example of the temperature indicating capsule, Pho
topia Yellow AQ-G, Glow Ye
llow MI-2G, Chromicolor Fa
stBlue AQ-37 and the same Agent AQ-
27, and Black AQ-17 (manufactured by Matsui Dyeing Chemical Industry Co., Ltd.).

Regarding the degree of acetalization of polyvinyl acetal, if the degree of acetalization is too small, the water resistance of the receiving layer is reduced, and if the degree of acetalization of polyvinyl acetal is too large, the receiving performance is reduced. Therefore, a polyvinyl acetal resin which is soluble in isopropyl alcohol containing 45 to 75% by weight of water by adjusting the degree of acetalization is suitable for simultaneously satisfying both acceptability and water resistance.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment)

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view of a recording sheet 1 according to the present embodiment.
Is used as a base paper when creating a certificate of recognition of facts and qualifications, such as a certificate of merit, a certificate of merit, a certificate of appreciation, and a pedigree book.

The recording sheet 1 is a sheet-like base material 1
The base material 11 is formed of a colorless and transparent 100 μm thick PET sheet. A transparent receiving layer 12 that is colorless and transparent and has a receptivity to inkjet ink is laminated on the entire surface of the substrate 11, and the transparent receiving layer 12 is a transparent receiving layer containing a polyvinyl acetal resin. After the layer ink is printed on the substrate, it is fixed and formed.

Further, on the back surface of the base material 11, a display layer 21 for realizing display on the surface of the transparent receiving layer 12 is laminated over the entire surface. The display layer 21 is composed of a printing portion 22 made of fixed ink and a special visual effect layer 23 that constitutes other portions except the printing portion 22 and includes an element that generates a special visual effect. Have been. The printing unit 22 is formed by printing characters and designs according to the use of the recording sheet 1. For example, when the printing unit 22 is used for qualification, the name of the group to be certified and its imprint are formed by printing. This display is printed from the back surface of the base material 11 so that it can be identified from the front surface of the sheet recording sheet 1. The special visual effect layer 23 is formed by printing a pearl ink containing a pearl pigment and then fixing the pearl ink.

Further, on the back surface of the display layer 21, an opaque backing layer 31 is laminated over the entire surface. The backing layer 31 is formed by printing and then fixing a solvent-based white ink using a polyester resin, and is colored white. This color is not limited to white, but white is effective in order to utilize the display color on the display unit 21.

On the back surface of the backing layer 31, an adhesive layer 41 for releasably attaching the recording sheet 1 to an object such as a desk or a wall is laminated on the entire surface excluding corners. The adhesive layer 41 is formed of a viscoelastic body formed by applying an ultraviolet curable coating ink uniformly by screen printing and then irradiating with ultraviolet light and fixing the applied ink. In addition, the coating ink may be applied in the form of dots to form the dot-shaped adhesive layer 41.

On the back surface of the adhesive layer 41, a laminate film 51 is stuck releasably. The entire surface of the adhesive layer 41 is covered with the laminate film 51.

The transparent receiving layer ink forming the transparent receiving layer 12 is formed by mixing the following components in respective proportions. In addition,% in this specification shall show weight%.

Polyacetal resin alcohol aqueous solution: 95 to 100% Additive: 0 to 5%

The pearl ink forming the special visual effect layer 23 is composed of the following components in respective mixing ratios. In the following, all units are “parts by weight”. (1) Pearl ink General example Particularly good example

Solvent ink using polyester resin: 40 to 90 83

Pearl pigment: 5 to 60 15

Additives: 0.5 to 52

In the present embodiment, the case where the special visual effect layer 23 is formed of a pearl ink containing a pearl pigment has been described as an example. However, the metallic ink containing a metallic pigment and the fluorescent pigment are not used. Fluorescent ink, black light ink containing black light pigment, BL containing fluorescent pigment and black light pigment
Fluorescent inks, hologram inks containing hologram pigments, luminous inks containing luminous pigments, luminous inks containing thermal capsules, high-brightness silver inks containing special aluminum materials (mirror inks), etc. good.

The components and mixing ratios of the respective inks used in these cases are shown below. In the following, all units are “parts by weight”. (2) Metallic ink General example Particularly good example

Solvent ink using polyester resin: 40 to 90 83

Gold powder No. 33: 5 to 50 15

Additives: 0.5 to 52 (3) Fluorescent ink General Examples Particularly Good Examples

Solvent type ink using polyester resin: 40 to 90 83

Fluorescent pigment: 5 to 60 15

Additives: 0.5 to 52 (4) Black light ink General examples Particularly good examples

Solvent ink using polyester resin: 40 to 90 83

BL pigment: 5 to 60 15

Additives: 0.5 to 52 (5) BL fluorescent ink General Examples Particularly Good Examples

Solvent ink using polyester resin: 40 to 90 83

BL pigment: 5 to 50 8 Fluorescent pigment: 5 to 50 7

Additives: 0.5 to 52 (6) Hologram ink General examples Particularly good examples

Solvent type ink using polyester resin: 40 to 90 83

The hologram pigment: 5 to 60 15

Additives: 0.5 to 5 2 (7) Luminescent Inks General Examples Particularly Good Examples

Solvent type ink using polyester resin: 50 to 90 60

N luminous G-210F: 10 to 50 40

Additives: 0.5 to 52 (8) Temperature indicating ink General examples Particularly good examples

Solvent ink using polyester resin: 40 to 90 83

Temperature indicating capsule slurry: 5 to 60 15

Additives: 0.5 to 52 (9) High-brightness silver ink (mirror ink) General examples Particularly good examples

Solvent type varnish: 2 to 20 10

Special aluminum material: 50 to 80 60

Solvent: 10 to 40 30

In the above (1) to (8), a solvent type ink using a polyester resin is used. However, the present invention is not limited to this. A similar special visual effect can be obtained by using an oxidative polymerization type ink using a modified phenol resin or the like or a UV curable ink.

The coating ink for forming the adhesive layer 41 is obtained by mixing the following components in respective proportions. In addition,% in this specification shall show weight%. Urethane oligomer: 30.0 to 60.0% Epoxy monomer: 8.0 to 15 2.0% Ester monomer 25.0-30.0% Acetophenone photoinitiator 3. 0 to 8.0% acylphosphine oxide 3.0 to 8.0% Elastomer 1 0.0 to 10.0% Silicon-free defoamer represented by acrylics etc. 1.0 to 3.0% Polymerization inhibitor ・ ・ ・ ・ ・ ・ ・ ・ ・... 0.1%

In the present embodiment having the above structure, a transparent receiving layer 12 having a receptivity to ink-jet ink is formed on the surface of the recording sheet 1 so that printing using the ink-jet ink is possible. Become. For this reason, it is possible to print information that changes individually such as a name and an issue date. Therefore, it is possible to create a certificate that recognizes facts and qualifications, such as a certificate of merit, a certificate of merit, a certificate of appreciation, and a pedigree book.

Further, on this surface, the display of the printing portion 22 on the display layer 21 is made visible through the base material 11 and the transparent receiving layer 12. The back surface is protected by the backing layer 31 while being protected by the material 11. Therefore, for example, when the recording sheet 1 is used for qualification, the printing unit 22 displaying the name of the organization to be certified and the imprint thereof can be protected, and the falsification of the printing unit 22 can be prevented.

Further, the display layer 21 is formed between the base material 11 made of PET and the backing layer 31. In other words, it is provided inside the base paper before printing used to create a certificate or the like. For this reason, it is possible to form a printed material that cannot be obtained by the forgery method of printing on the surface with a copying machine or a printer. Therefore, forgery can be prevented.

The backing layer 31 is formed in white, and the surface of the recording sheet 1 is provided with a white backing layer 3.
The display by the printing unit 22 with 1 as a background can be made visible. Thereby, the visibility of the display can be improved. In addition, the display layer 21 is
Can be concealed.

The display layer 21 is provided on the printing unit 2.
The other part except 2 is constituted by a special visual effect layer 23 including an element generating a special visual effect, and the special visual effect layer 23 is formed by a pearl ink containing a pearl pigment. . Thus, the display layer 2 containing a special visual effect color that cannot be copied by a color copier or printed by a printer is formed on the surface of the recording sheet 1.
1, specifically, a display having a pearl color. Therefore, a deterrent effect against forgery can be obtained.

When the special visual effect layer 23 is formed using the inks (2) to (9) described above, the special visual effect layer which cannot be copied by a color copier or printed by a printer is similarly used. Since the display of the color that produces the effect can be made obvious, a deterrent effect against forgery can be obtained.

(Second Embodiment)

FIG. 2 is a schematic sectional view of a recording sheet 101 according to a second embodiment of the present invention. The recording sheet 101 includes a certificate of merit, a certificate of merit, a certificate of appreciation, a pedigree book, and the like.
It is used as a base paper when creating a certificate that certifies facts and qualifications.

The recording sheet 101 is composed mainly of a sheet-like base material 111. The base material 111 is formed of a white PET sheet having a thickness of 100 μm. On the surface of the base material 111, a special visual effect receiving layer 112 containing a pearl pigment and having receptivity to inkjet ink is laminated over the entire surface, and the special visual effect receiving layer 112 is formed of a polyvinyl acetal resin. The pearl receiving layer ink containing
11 is printed and then fixed.

An adhesive layer 121 for releasably attaching the recording sheet 101 to an object such as a desk or a wall is laminated on the entire back surface of the substrate 111 except for corners. The adhesive layer 121 is formed of a viscoelastic body obtained by applying the same coating ink as in the first embodiment uniformly by screen printing, and then irradiating with ultraviolet rays and fixing the applied ink. In addition, the coating ink may be applied in the form of dots to form the dot-shaped adhesive layer 121.

On the back surface of the adhesive layer 121, a laminate film 131 is releasably attached.
The entire surface of the adhesive layer 121 is a laminate film 1
31.

The pearl receiving layer ink forming the special visual effect receiving layer 112 has the following components in the respective mixing ratios. In the following, all units are “parts by weight”. (21) Pearl receiving layer ink General example Particularly good example Polyvinyl acetal resin alcohol aqueous solution: 40 to 9083 Pearl pigment: 5 to 60 15 Additive: 0.5 to 52

In the present embodiment having the above-described structure, a special visual effect receiving layer 112 having receptivity to inkjet ink is formed on the surface of the recording sheet, and printing using the inkjet ink is possible. Becomes For this reason, it is possible to print information that changes individually such as a name and an issuance date, and prescribed items such as an organization name and its imprint. Therefore, it is possible to create a certificate that recognizes facts and qualifications, such as a certificate of merit, a certificate of merit, a certificate of appreciation, and a pedigree book.

The special visual effect receiving layer 112
Contains pearl pigments and develops a pearl color, one of the special visual effect colors that cannot be copied by a color copier or printed by a printer. For this reason, it is possible to form a printed matter such as a certificate which cannot be obtained by the forgery method of printing on the surface with a copying machine or a printer. Therefore, forgery can be prevented. Further, similarly to the first embodiment, an effect of suppressing forgery can be obtained.

In the present embodiment, the case where the special visual effect receiving layer 112 is formed using a pearl receiving layer ink containing a pearl pigment has been described as an example. However, the present invention is not limited to this. For example, a metallic receiving layer ink containing a metallic pigment, a fluorescent receiving layer ink containing a fluorescent pigment, a black light receiving layer ink containing a black light pigment, a BL containing a fluorescent pigment and a black light pigment Fluorescent receiving layer ink, hologram receiving layer ink containing hologram pigment, luminous receiving layer ink containing luminous pigment, temperature indicating receiving layer ink containing temperature indicating capsule, high brightness silver receiving layer ink containing special aluminum material (mirror ink) ) May be used.

The components and mixing ratios of the respective inks used in these cases are shown below. In the following, all units are “parts by weight”. (22) Metallic receiving layer ink General example Particularly good example Polyvinyl acetal resin alcohol aqueous solution: 40 to 9083 Gold powder No. 33: 5 to 50 15 additive: 0.5 to 52 (23) Fluorescent receiving layer ink General example Particularly good example Polyvinyl acetal resin alcohol aqueous solution: 40 to 9083 Fluorescent pigment: 5 to 60 15 Additive: 0.1 5 to 52 (24) Black light receiving layer ink General example Particularly good example Polyvinyl acetal resin alcohol aqueous solution: 40 to 9083 BL pigment: 5 to 60 15 Additive: 0.5 to 52 (25) BL fluorescence reception Layer ink General example Particularly good example Polyvinyl acetal resin alcohol aqueous solution: 40 to 9083 BL pigment: 5 to 508 Fluorescent pigment: 5 to 50 7 Additive: 0.5 to 52 (26) Hologram receiving layer ink General example Particularly good examples: Polyvinyl acetal resin alcohol aqueous solution: 40 to 9083 hologram pigment: 5 to 6015 Additive: 0.5 to 0.5 2 (27) temperature-indicating receiving layer ink typically Examples particularly good example polyvinyl acetal resin aqueous alcohol: 40 to 90 83

Temperature-indicating capsule slurry: 5 to 60 15

Additive: 0.5 to 52

Similarly, when the special visual effect receiving layer 112 is formed by using the inks (22) to (27) described above, the special visual effect which cannot be copied by a color copier or printed by a printer can be used. Color can be developed. Therefore, a forgery prevention effect and a forgery deterrent effect can be obtained.

[0087]

As described above, in the recording sheet according to the first aspect of the present invention, since printing using ink-jet ink is possible, it is possible to print information that changes individually such as a name and a date of issue. it can. In this way, it is possible to create a certificate that recognizes facts and qualifications, such as a certificate of merit, a certificate of merit, a certificate of appreciation, and a pedigree book.

The display is visualized on the surface of the recording sheet, and the display layer for realizing the display is formed below the base material.

As a result, it is possible to form a printed matter that cannot be obtained by the forgery method of printing on the surface with a copying machine or a printer. Therefore, forgery can be prevented.

The recording sheet according to the second aspect further includes a backing layer further laminated on the back surface of the display layer.

Thus, the surface of the display layer can be protected by the base material, and the back surface can be protected by the backing layer. Further, the display layer comprises:
It is formed between the base material and the backing layer, and is provided inside the base paper before printing.

Therefore, in the forgery method of printing on the surface with a copying machine or a printer, it is possible to form a printed material which cannot be obtained, and the forgery prevention effect can be further enhanced.

Further, in the recording sheet according to the third aspect, by forming the backing layer with an opaque layer, the display with the background of the backing layer on the surface of the recording sheet can be realized. it can. Further, the display layer formed on the back surface of the base material can be hidden by the backing layer.

In addition, with the recording sheet according to the fourth aspect, it is possible to make the display of the display layer that produces a special visual effect that cannot be copied by a color copying machine or printed by a printer visible. Therefore, a deterrent effect against forgery can be obtained.

In the recording sheet according to the fifth aspect, printing using an ink jet ink is possible.
It is possible to print information that changes individually such as a name and an issue date, and prescribed items such as an organization name and its imprint. In this way, it is possible to create a certificate that recognizes facts and qualifications, such as a certificate of merit, a certificate of merit, a certificate of appreciation, and a pedigree book.

The special visual effect receiving layer on the surface contains elements that generate a special visual effect, such as metallic pigments, pearl pigments, fluorescent pigments, black light pigments, hologram pigments, luminous pigments, and temperature indicating capsules. It produces a special visual effect color that cannot be copied by a color copier or printed by a printer. As a result, it is possible to form a printed material that cannot be obtained by the forgery method of printing on the surface with a copying machine or a printer. Therefore, forgery can be prevented. In addition, a deterrent effect against forgery can be obtained as in the fourth aspect.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a recording sheet according to a first embodiment of the present invention.

FIG. 2 is a schematic sectional view of a recording sheet according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Recording sheet 11 Base material 12 Transparent receiving layer 21 Display layer 22 Printing part 23 Special visual effect layer 31 Backing layer 101 Recording sheet 111 Base material

Claims (5)

[Claims] 1. A sheet-shaped base material having transparency, a transparent receiving layer laminated on the surface of the base material, having transparency and accepting ink-jet ink, and laminated on a back surface of the base material. And a display layer for realizing a display on the surface of the transparent receiving layer. 2. The recording sheet according to claim 1, further comprising a backing layer further laminated on the back surface of the display layer. 3. The recording sheet according to claim 2, wherein said backing layer is formed of an opaque layer. 4. The display layer according to claim 1, wherein the display layer includes an element which generates a special visual effect, such as a metallic pigment, a pearl pigment, a fluorescent pigment, a black light pigment, a hologram pigment, a luminous pigment, and a temperature capsule. 4. The recording sheet according to any one of 2 and 3. 5. A sheet-like base material, comprising an element which generates a special visual effect such as a metallic pigment, a pearl pigment, a fluorescent pigment, a black light pigment, a hologram pigment, and a temperature capsule, which are laminated on the surface of the base material. And a special visual effect receiving layer having receptivity to the ink jet ink.