JP2001171275A - Negotiable securities - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide negotiable securities issued in a relatively small quantity to prevent its forgery without using a watermark. SOLUTION: The negotiable securities comprise first base paper A1 having a print layer A on one surface and a pressure sensitive adhesive layer A2 on the other surface, second base paper B having at least a pressure sensitive adhesive layer B2, and a print layer C provided on at least one of the layer A2 and the layer B2 in such a manner that the layer A2 is surface contacted with and hence pressurized integrally with the layer B2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the improvement of securities, in particular, local promotion coupons, other gold coupons, discount coupons and the like issued in relatively small quantities.

[0002]

2. Description of the Related Art Conventionally, securities and cash vouchers are watermarked at the paper making stage, hologram tape is inserted at the paper making stage, or partial printing of different colors due to temperature differences is performed on the paper. It is usually difficult to forge.

[0003]

Since the above-mentioned prior art is a method of applying a prevention technique at the papermaking stage or the papermaking stage, it is an effective means for securities such as stock certificates or mass certificates produced in large quantities. The cost is high because special watermarks are printed on paper and special printing is performed.In the case of small-lot regional promotion tickets and cash vouchers, it is a technology that is extremely difficult to adopt in terms of technical cost. The advent of anti-counterfeiting technology is expected.

[0004]

The present invention has been made in view of the above-mentioned circumstances.
The invention of claim 1 prints on one side.
Layer (A₁), Pressure-sensitive adhesive layer (A₂Having
A first base paper (A) and at least a pressure-sensitive adhesive layer (B₂)
A pressure-sensitive adhesive layer comprising a second base paper (B) having
(A₂) And pressure-sensitive adhesive layer (B₂) At least
A printing layer (C) provided on the surface, and the pressure-sensitive adhesive
Agent layer (A₂) And pressure-sensitive adhesive layer (B₂) And surface contact
Securities characterized by being integrated under pressure,
The invention according to claim 2 provides a printing layer (A) on one surface.₁), The other
A base paper (A) having a pressure-sensitive adhesive layer (A2)
Pressure-sensitive adhesive layer (A₂) In between
(D) to be integrated by pressurizing, and
Combined pressure-sensitive adhesive layer (A ₂The print layer (C) is formed on the surface
The securities are characterized by being formed.

According to a third aspect of the present invention, there is provided the securities according to the first or second aspect, wherein the printing layer (C) is formed of a light or glossy ink. The invention of Item 4 is the securities according to Claim 1 or 2, wherein the information of the print layer (C) is formed so as to be visually recognized only when viewed through. Item 5 is a pressure-sensitive adhesive used in at least one of the pressure-sensitive adhesive layer (A ₂ ) and the pressure-sensitive adhesive layer (B ₂ ), mainly comprising a natural rubber-based adhesive and a pigment. 2. The composition according to claim 1, which is contained as a component.
Securities.

[0006] By adopting such a configuration,
The printed layer (C) is formed like a watermark pattern, is not visually recognized from the appearance, and has an effect as forgery prevention information. In addition, since the pressure-sensitive adhesives of the two base papers (including the case where they are composed of two sheets and the case where they are folded back and made the same as the two sheets) are strongly bonded, even if the two base papers are to be peeled off at this point, the intermediate For example, characters or designs printed on the screen are partially peeled off or left, resulting in a "dappled" state.
Even if they are pasted together, it can be visually and very easily distinguished from the original one at a glance, and it is difficult to duplicate the information of the printed layer (C).

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings.
I do. FIG. 1 shows an example of the securities of claim 1 of the present invention.
In cross section, the surface of the first base paper (A) is
Print layer (A) that displays characters, designs, etc.₁) Is provided,
A pressure-sensitive adhesive layer (A₂)
I have. The second base paper (B) has a pressure-sensitive adhesive layer on the surface.
(B₂) Is provided, and a printed layer of characters, designs, etc. is provided on the surface.
(C) is provided. And the first
The base paper (A) and the second base paper (B) are provided with a pressure-sensitive adhesive layer (A
₂) And pressure-sensitive adhesive layer (B₂) And are pressure-bonded by surface contact
At this time, the printing layer (C) is present. to this
Under normal conditions, the pattern is seen thinly from the front and back
Or not at all. Such a structure
Pressure-sensitive adhesive layer (A) to replicate the printing layer (C) from
₂) And (B₂) On the adhesive surface
The written pattern will be in the state of Madara.
It is easy to understand and makes forgery difficult.

FIG. 2 is a perspective view of an example of a spare base paper for producing the securities according to claim 2 of the present invention. Its structure is to provide a pressure-sensitive adhesive layer (A ₂ ) on the surface of the base paper (A),
A folded line is provided in the middle (D) (the middle between the left and right in the figure), and a printed layer (C) is formed on one side thereof.
In addition, a printed layer (A ₁ ) for displaying as securities is provided on the back surface of the base paper (A). FIG. 3 shows a state in which such a product is folded back in the middle (D), and the securities according to claim 2 of the present invention are obtained. It goes without saying that the print layer (C) may be formed on the entire surface or a part of one side.

The printing layer (A ₁ ) in the present invention is formed by printing characters, amounts, patterns, etc. for display as securities as described above, and the printing layer (C) is for preventing forgery. This is a printout of information formed for the purpose. The information of the print layer (C) is formed so that it is slightly visible from the front surface or the back surface, or not visible at all, but is printed so as to be visible when viewed through. Is preferred. In order to achieve such printing, it is preferable to use light or glossy ink. The printing layers (A ₁ ) and (C)
Can be formed by appropriately selecting various printing methods such as offset printing and screen printing.

Next, each material used in the present invention will be described.

As the base paper used in the present invention, various wood pulp papers can be used. However, by adding a paper strength enhancer or applying a surface sizing agent so as to have strength as a securities, It is preferable that the paper is adjusted so that the strength and the paper interlayer strength are higher than the ink tack and lower than the adhesive strength when the pressure-sensitive adhesive layer is pressure-bonded by surface contact. Examples of paper strength agents include polyacrylamide resins, polyamide epichlorohydrin resins, modified starches such as cationized starch and acetylated starch, melamine resins, urea resins, CMC, guar gum, modified guar gum, polyamide resins, and polyamine resins. And an internally added paper strength enhancer such as epoxy-modified polyamide.

The degree of beating of the base paper is closely related to the strength between the paper layers. As the degree of beating increases, the strength between the paper layers also increases. However, when the degree of beating increases, the dimensional stability deteriorates. Therefore, the degree of beating is maintained at 40 to 60 ° SR, and the interlayer strength between the paper and the internal paper is increased as described above. It is preferable to supplement by adding an agent. In the present invention, in this manner, the paper interlayer strength is set to be higher than the printing pressure of the ink at the time of printing such as offset printing, and set to a range weaker than the adhesive force after the pressure-sensitive adhesive is pressed as described above. Is preferred, and specifically 40 to 170 g / 15
mm, particularly preferably 50 to 120 g / 15 mm. Here, if the paper interlayer strength is less than 40 g / 15 mm, a trouble may occur during printing, and 170 g / 15
If it exceeds mm, it becomes difficult to cause interlayer cracks when the security paper is peeled off.

It is desirable that the surface strength of the paper is high.
Specifically, the surface strength (method using a wax of JIS P8129) is preferably 14A or more. By applying the following coating chemicals to the paper surface, the surface paper strength can be made 14A or more. Preferred coating chemicals include oxidized starch, modified starch, polyvinyl alcohol (PVA), modified polyvinyl alcohol, polyacrylamide, CMC, styrene resin, styrene maleic resin, styrene acrylic resin, and the like. In particular, oxidized starch alone has a slightly poor effect of increasing the surface strength, and polyvinyl alcohol alone has too high a coating property or is expensive and economically unfavorable, so when oxidized starch or polyvinyl alcohol is used, both of them are used. It is preferable to use a mixture.

When a water-based (latex-based) color is used as a coating color when forming the pressure-sensitive adhesive layer, the paint penetrates unless the size effect is applied to the base paper.
2) is preferably 5 seconds or more. If the stext size is less than 5 seconds, the pressure-sensitive adhesive does not exhibit the predetermined performance due to the penetration of the paint, and the size effect tends to vary, so that the adhesive force varies, which is preferable. Absent. To adjust the degree of text size to the above range, a sizing agent may be internally added or coated.

Generally, the internal sizing agent includes rosin type, alkyl ketene dimer, alkenyl succinic anhydride, alkenyl succinic acid, higher fatty acid type and the like. Acid-based resins, styrene-acrylic resins, olefin-based resins, acrylic-based resins, diisobutylene-maleic anhydride and the like can be mentioned.

Next, the pressure-sensitive adhesive used for the pressure-sensitive adhesive layer (A ₂ ) and the pressure-sensitive adhesive layer (B ₂ ) will be described. The pressure-sensitive adhesive may be of any type as long as it is an adhesive that is adhered by pressure, but a non-adhesive component is blended with an adhesive component, and has printing suitability at normal temperature,
Further, a material having an adhesive strength that does not cause re-peeling under pressure is applied.

As the pressure-sensitive adhesive used in the pressure-sensitive adhesive layer of the present invention, a pressure-sensitive adhesive obtained by mixing 90 to 400 parts by weight of a non-adhesive component with respect to 100 parts by weight of the adhesive component is preferable. The pressure-sensitive adhesive is preferably applied to both sides of the paper support so that the dry coating amount is ² to 10 g / m ² . When the dry coating amount is less than 2 g / m ² , the effect as an adhesive layer is poor, and when the coating amount exceeds 10 g / m ² , it is not preferable because it is not economically practical.

As the pressure-sensitive adhesive for the upper paper,
Since it is not printed on the surface here, natural rubber adhesive 100
A pressure-sensitive adhesive which is blended in a ratio of 90 to 285 parts by weight of the non-adhesive component to parts by weight is preferable. 9 non-adhesive components
When the amount is less than 0 parts by weight, the adhesive strength becomes too strong and the blocking resistance before laminating is inferior. On the other hand, when the amount exceeds 400 parts by weight, the adhesive strength becomes too weak and the print layer (C) leads to paper breakage. Instead, it can be peeled back to a state before being overlapped and pressure-bonded.

As the adhesive component of the pressure-sensitive adhesive, a natural rubber-based resin is preferably used because it is particularly excellent in self-adhesiveness during pressure bonding. Preferred natural rubbers include raw natural rubber latex, vulcanized natural rubber latex, and natural rubber latex obtained by graft copolymerization of methyl methacrylate (MMA). Examples of the vulcanizing agent for the vulcanized natural rubber latex include sulfur, sulfur-containing compounds, organic peroxides, metal oxides, organic polyamines, and modified phenol resins.

Examples of the non-adhesive component include a pressure-sensitive adhesive containing a fine-grained filler, synthetic rubber, a water-soluble polymer, and a heat-coatable resin.

The finely divided fillers can be classified into inorganic fillers and organic fillers. Examples of the inorganic filler include calcium carbonate, clay, kaolin clay, silica, zinc oxide, alumina, mica, and glass powder. Among these inorganic fillers, blocking resistance,
When considering the acceptability of the printing ink, it is preferable to use silica.

Examples of the organic filler include cellulose powder, sweet potato starch, potato starch, wheat starch, corn starch, rice starch, tapioca starch, styrene beads, methyl methacrylate beads and the like. These organic fillers have an average particle size of 5 to 5.
Since it is as large as 30 μm, when it is added to the pressure-sensitive adhesive, the back surface of the pressure-sensitive adhesive layer can be modified into irregularities, the adhesive strength can be adjusted, the blocking resistance can be improved, and the slip property can be imparted. Therefore, these organic fillers are preferably added in powder form.

As the above synthetic rubber, SBR, NBR,
MBR, neoprene rubber and the like can be mentioned. As the water-soluble polymer, carboxymethylcellulose (CM
C), casein, dextrin, starch, modified starch, polyvinyl alcohol, modified polyvinyl alcohol, and the like can be used. Examples of the heat-coatable resin include polyvinyl acetate, polyacrylic acid, and polyacrylate. In particular, SBR having a high glass transition point (Tg), modified starch comprising starch, esterified starch, etherified starch, and oxidized starch, and polyvinyl alcohol can be used alone or in combination. These synthetic rubbers, water-soluble polymers, and heat-coatable resins
Adjusting adhesive strength, improving blocking resistance, preventing filler from falling off, improving coating strength of pressure-sensitive adhesive layer, improving adhesion between base paper and pressure-sensitive adhesive layer, adjusting viscosity of pressure-sensitive adhesive paint, and leaking Can be added for the purpose of improving the properties.

Example 1 A pressure-sensitive adhesive having the following composition was applied to one side of high-quality paper 52 g / m ² (trade name: Shiraoi, manufactured by Daishowa Paper Co., Ltd., paper interlayer strength 53 g / 15 mm) to a thickness of 8 μm. Pressure-sensitive adhesive layer was formed. [Pressure-sensitive adhesive] * MMA graft natural rubber adhesive 100 parts by weight * Silica (Fuji Silysia Chemical Ltd., trade name: Sylysia 350) 80 parts by weight * Constarch (Nippon Shokuhin Kako Co., Ltd.) 80 parts by weight * SBR ( 65 parts by weight of Zeon Corporation, trade name: LX416) Characters and copy-forgery-inhibited pattern were printed on the surface of the pressure-sensitive adhesive layer by a laser printer. This printing surface and another one without printing
Two sheets of the pressure-sensitive adhesive layer were overlapped and pressure-bonded. Bonding was performed with a roll gap of 60 μm using a pressure bonding machine (manufactured by Nippon Rika Paper Co., Ltd., trade name: partner). However, because the paper to be pasted is thin,
A 170 μm-thick backing paper was used.

Example 2 In Example 1, foam paper (manufactured by Kishu Paper Co., Ltd., trade name: KPF75, paper layer sensitivity 75 g / 15) was used in place of high quality paper.
mm) and the pressure-sensitive adhesive was changed to the following composition,
A laminated sheet was produced in the same manner as in Example 1. [Pressure-sensitive adhesive] * 100 parts by weight of MMA-grafted natural rubber-based adhesive * 10 parts by weight of silica (trade name: Sylysia 350, manufactured by Fuji Silysia Chemical Ltd.) * 10 parts by weight of constarch (manufactured by Nippon Shokuhin Kako Co., Ltd.) * SBR ( Made by Zeon Corporation, trade name: LX416) 20 parts by weight

Example 3 An impregnated paper (manufactured by Tokushu Seiyaku Co., Ltd., trade name: S-Belan, paper layer sensitivity: 200 g / 15 m) in place of high quality paper in Example 1.
m), a laminated paper was prepared in the same manner as in Example 1 except that the pressure-sensitive adhesive was changed to the following composition. [Pressure-sensitive adhesive] * 100 parts by weight of natural rubber-based adhesive (raw natural rubber) * 70 parts by weight of silica (trade name: Sylysia 350, manufactured by Fuji Silysia Chemical Ltd.) * 70 parts by weight of constarch (manufactured by Nippon Shokuhin Kako) * SBR (manufactured by Zeon Corporation, trade name: LX416) 100 parts by weight * PVA 40 parts by weight (completely saponified, manufactured by Nippon Synthetic Chemical Company, trade name: Gohsenol N-300)

In the above method for measuring the sensitivity of the paper layer, an adhesive tape made of a polyester film having a thickness of 25 μm was stuck on both sides of the paper so as to be in close contact with each other, and both ends of the adhesive tape were separated from each other. At the time of separation, T-type peeling was performed at a tensile speed of 300 mm / min using a Tensilon tensile tester (trade name: Tensilon RTM-100 manufactured by Orientec). The force required at this time was defined as the paper layer strength.

Next, letters were printed on the back side of the bonded sheets of Examples 1 to 3 and a pattern was printed on the front side with an ink jet printer. The part printed with the letters printed on the pressure-sensitive adhesive surface was made very light. Text printed on the pressure-sensitive adhesive surface looks like a watermark. An attempt was made to peel the paper at the bonding surface, but in Examples 1 and 2, the paper interlayer was broken. Further, Example 3 was partially peeled off at the interface between the pressure-sensitive adhesive layers, and the anti-counterfeiting property was somewhat inferior to Examples 1-2. In addition, the papers of Examples 1 and 2 were peeled by hand at the adhesive layer, but it was difficult to peel them uniformly, and an intermediate pattern print adhered to either the upper paper or the lower paper. The pattern in the middle of the spot was mixed, confirming that it was difficult to forge at all.

[0029]

According to the present invention, a high-quality technique such as a watermark is not adopted, and only a continuous pattern of characters or patterns is provided in the middle adhesive layer of paper constituting two layers.
It can be produced at low cost. As a result, even a very small lot of securities, such as 500 sheets, 1000 sheets, or 10,000 sheets, does not increase the cost, and the intended counterfeit prevention effect can be obtained in the intermediate adhesive layer. It can be demonstrated by the presence of patterns.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an example of the securities of the present invention.

FIG. 2 is a perspective view showing the structure of a spare base paper for manufacturing securities used in the present invention.

3 is a cross-sectional view of another example of the securities of the present invention produced by folding the spare base paper of FIG. 2;

[Explanation of symbols]

 A Base paper A1 Print layer A2 Pressure-sensitive adhesive layer B Base paper B2 Pressure-sensitive adhesive layer C Print layer D Intermediate

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Tadashi Imai 3-1 Yosoba-cho, Shizuoka-shi, Shizuoka Prefecture Inside the paper division of Hamakawa Paper Mill Co., Ltd. (72) Inventor Yasuhiro Sakakibara 3-Chome Nakanogo, Shimizu-shi, Shizuoka No. 1-1 Nippon Rika Paper Co., Ltd. (72) Yoshikazu Sakakibara, Inventor 3-1-1 Nakanogo, Shimizu-shi, Shizuoka Japan F-term in Rika Paper Co., Ltd. 2C005 HA30 HB10 JB40 KA38 KA40 LA04

Claims (5)

[Claims] 1. A _first base paper having a printing layer (A ₁ ) on one side and a pressure-sensitive adhesive layer (A ₂ ) on the other side, and at least a pressure-sensitive adhesive layer (B ₂₎ And a printing layer (C) provided on at least one of the surfaces of the pressure-sensitive adhesive layer (A ₂ ) and the pressure-sensitive adhesive layer (B ₂ ). A security, wherein the pressure-sensitive adhesive layer (A ₂ ) and the pressure-sensitive adhesive layer (B ₂ ) are pressure-integrated by surface contact. 2. A base paper (A) having a printing layer (A ₁ ) on one side and a pressure-sensitive adhesive layer (A ₂ ) on the other side, and the pressure-sensitive adhesive layer (A ₂ ) is laminated. It is characterized by being folded back at the middle (D) so as to fit together and pressurized and integrated, and a printing layer (C) is formed on the surface of the superposed pressure-sensitive adhesive layer (A ₂ ). Securities. 3. The security according to claim 1, wherein the printing layer (C) is formed of a light-colored or glossy color ink. 4. The security according to claim 1, wherein the information of the printing layer (C) is formed so as to be visually recognized only when viewed through the screen. 5. The pressure-sensitive adhesive used in at least one of the pressure-sensitive adhesive layer (A ₂ ) and the pressure-sensitive adhesive layer (B ₂ ) comprises a natural rubber-based adhesive and a pigment as main components. The securities according to claim 1, wherein the securities are contained as: