JP4404451B2 - Pressure-sensitive copy sheet for preventing falsification - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pressure-sensitive copying sheet for preventing tampering using a back carbon, in which a tampering due to tampering can be easily detected in a pressure-sensitive copying sheet using a back carbon.
[0002]
[Problems to be solved by the invention]
In general, as for copy forms, those using carbonless paper are the mainstream, but those using back carbon paper are still required due to the after-effect of the toxicity problem of PCB drugs, and there is a great demand for them. Thus, a back carbon type pressure-sensitive copying sheet that is widely used even today is, for example, a transfer sheet Q in which a back carbon ink layer P is provided on the opposite surface side as shown in FIG. A sheet having a configuration in which the receiving sheet R corresponding to this is joined S at one end is representative.
[0003]
However, in the above-described conventional back carbon type pressure-sensitive copying sheet, the transfer sheet Q to be managed and the receiving sheet R to be handed over to customers are separated, and each of the transfer sheet Q and the receiving sheet R is independent. There is a problem that there is no method of verifying from a transfer sheet to be collected and managed even if tampering is performed to fill in the contents.
That is, the applicant (creator) separates the transfer sheet Q and the receiving sheet R of the pressure-sensitive copying sheet, and another receiving sheet R1 prepared improperly by the applicant as shown in FIG. 5B. In addition, the entry A is entered in the transfer sheet Q, the transfer sheet Q having the entry A is submitted to the management department, etc., and the applicant prepared illegally as shown in FIG. Using another transfer sheet Q1 having the back carbon ink layer P, a different entry B is copied and entered on the regular receiving sheet R and submitted to the acceptor.
In this case, since there is a difference between the description item B of the receiving sheet R possessed by the acceptor and the description item A described on the transfer sheet Q managed by the management department or the like, an illegal problem occurs. In these cases, if the applicant's falsification is skillful, the authenticity of the description on the transfer sheet cannot be determined.
[0004]
In order to prevent fraud by easily detecting such alteration, the present inventor previously accepted a transfer sheet with respect to the pressure-sensitive copy sheet for preventing alteration using a back carbon. A developer and a back carbon layer were sequentially laminated on the sheet-side facing surface, and a color former microcapsule layer containing a color former that developed a color different from that of the back carbon ink was provided on the transfer sheet-side facing surface of the receiving sheet. Proposes pressure-sensitive copying sheets. In this pressure-sensitive copying sheet, only on regular use, copying on the receiving sheet surface by transfer of the back carbon ink and copying on the back side of the transfer sheet by transfer of the coloring agent are performed simultaneously. It is. That is, the presence or absence of tampering can be determined by confirming copying on the back side of the transfer sheet.
In the present invention, it is an object to make the copy on the back side of the transfer sheet clearer and to make it easier to confirm the copy. .
[0005]
[Means for Solving the Problems]
The present invention has been made in consideration of the above-mentioned problems, and is a pressure-sensitive copying sheet in which a transfer sheet and a receiving sheet are overlapped, and a back carbon ink layer is disposed at a point on the opposite surface of the transfer sheet. The first color former microcapsule layer containing a color former that develops a color different from that of the back carbon ink and the developer layer are laminated between the transfer sheet and the back carbon ink layer, and the opposite side of the receiving sheet. A second color former microcapsule layer containing a color former that develops a color different from that of the back carbon ink is provided at least in a predetermined area facing the back carbon ink layer on the surface, and color development of the first color former microcapsule layer The color when the coloring agent develops differs from the color when the coloring agent of the second color former microcapsule layer develops. Provides tamper prevention pressure-sensitive copying sheet, characterized in that provided unique to the carbon ink, it is to solve the above problems.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, the present invention will be described in detail based on the embodiment shown in FIGS.
First, in FIG. 1, reference numeral 1 is a pressure-sensitive copying sheet for preventing falsification, and the pressure-sensitive copying sheet 1 is obtained by superposing a transfer sheet 2 and a receiving sheet 3 and binding 4 at one end. It is. An entry field (not shown) is provided on the surface of the transfer sheet 2. Then, on the surface of the transfer sheet 2 facing the receiving sheet 3, the developer layer 5, the first color developer microcapsule layer 6, and the back carbon ink layer 7 are sequentially formed in the region corresponding to the entry field from the transfer sheet 2 side. The first color former microcapsule layer 6 is a transparent layer containing a color former that develops a different color from the back carbon ink forming the back carbon ink layer 7. In this way, on the transfer sheet 2 side, the developer layer 5 and the first color developer microcapsule layer 6 are laminated between the transfer sheet 2 and the back carbon ink layer 7.
On the other hand, on the surface of the receiving sheet 3 facing the transfer sheet 2, the second color former microcapsule layer 8 and the hard layer 9 are disposed in order from the transfer sheet 2 side in a predetermined region facing at least the back carbon ink layer 7. Are stacked. Even the second color former microcapsule layer 8 in the receiving sheet 3 is a transparent layer containing a color former that develops a different color from the back carbon ink constituting the back carbon ink layer 7 . Note that the color of the color former in both layers is different from each other , which will be described later.
The hard layer 9 is formed as an undercoat layer coated with an undercoat agent, and the second color former microcapsule layer 8 is provided on the hard layer 9.
[0007]
As the developer forming the developer layer 5, for example, clays such as activated clay, acidic clay, zeolite, bentonite, phenol resins, polyvalent metal salts of aromatic carboxylic acids, and mixtures thereof can be used. In particular, a zinc salt of a 2,2-bisphenolsulfone compound is preferable because of good storage stability of printing.
[0008]
As the color former contained in the first and second color former microcapsule layers 6 and 8, an electron donating color former can be used. For example, thiazine dyes such as benzoyl leucomethylene blue and p-niolobenzoylmethylene blue, 3 , 3-anneal methane dyes such as 3-bis (p-dimethylaminophenyl) -6-dimethylaminophthalide, diphenyl methane dyes such as 4,4-bis-dimethylaminobenzhydrylbenzyl ether, 3- Although it can be arbitrarily selected from spiro dyes such as phenyl-spirodinaphthopyran, fluorane dyes such as 3-piperidino-methyl-7-phenylaminofluorane, etc., it is premised that the color tone differs from the back carbon ink .
[0009]
Microcapsules containing such color formers can be produced by a known coacervation method, interfacial polymerization method, in situ polymerization method, etc., and the capsule dispersion liquid is mixed and dispersed in a non-aqueous solvent together with a surfactant. And an oil-soluble binder is added.
This microcapsule is preferably made into an ultraviolet curable ink that can be applied in a spot manner and can be quickly dried without heating. That is, in a non-aqueous capsule dispersion liquid, a non-aqueous solvent, a binder, a surfactant, a capsule protective agent, an ultraviolet absorber, a photopolymerization initiator, a wax, a thickener, a sensitizer, a main agent such as a gelling agent, This is an ultraviolet curable microcapsule coating obtained by mixing an auxiliary agent.
[0010]
The type of the undercoat agent for forming the hard layer 9 is not particularly limited. For example, various medium inks are preferable, and from the viewpoint of production and performance, UV curable medium ink or oily is particularly preferable. It is good to form by applying medium ink.
[0011]
When the pressure-sensitive copying sheet 1 constructed in this way is filled in the entry field of the transfer sheet 2 with a ballpoint pen or the like during use, the corresponding portion 7a of the back carbon ink layer 7 becomes the second color of the receiving sheet 3 as shown in FIG. It is transferred and copied onto the agent microcapsule layer 8. By pressurization by filling, the microcapsules of the first color former microcapsule layer 6 and the second color former microcapsule layer 8 are broken, and the color former comes out from both layers.
The color developer from the receiving sheet 3 side passes through the falling portion 7b of the back carbon ink layer 7 and transfers to the developer layer 5, and the color developer on the transfer sheet 2 side transfers directly to the developer layer 5. Then, the color formers from both color the developer layer 5 .
In addition, since the lower layer of the second color former microcapsule layer 8 is a hard layer 9 and is hard, the second color former microcapsule layer 8 is pressed against the undercoat 9 when written, The microcapsules are surely destroyed. Therefore, the color former of the second color former microcapsule layer 8 easily reaches the developer layer 5, and from this point, the color development portion 10 can be vividly colored.
[0012]
As described above, each of the color formers of the first and second color former microcapsule layers 6 and 8 reacts with the developer in the developer layer to develop a color different from that of the back carbon ink. Then, first, in the color former respective second color former microcapsule layers 6 and 8, select the one that develops a color different than alone, provided to mix colored with a color unit 10 described above Thus, a combination of color formers is selected so that this mixed color is different from the back carbon ink.
[0013]
FIG. 3 shows a state in which the pressure-sensitive copying sheet 1 is attempted to be tampered with, in the case of making a description that is a modification of the officially described matter and in the case of writing a false matter. Also, only the transfer sheet 2 is filled in.
That is, if an incorrect description item is entered on the transfer sheet 2, the corresponding portion 7 a of the back carbon ink layer 7 falls off due to this entry. Although it is assumed that the transfer sheet is placed on some kind of application paper in the case of this incorrect description, even if the transfer sheet 2 is described, the corresponding portion is transferred to the underlying surface. When this tampering is performed, the color former in the second color former microcapsule layer does not transfer because there is no receiving sheet .
[0014]
In addition, when information is described on the transfer sheet 2 alone, the microcapsules of the first color developer microcapsule layer 6 provided on the transfer sheet 2 are broken, and the color developer reaches the developer layer 5 and develops color. but it addressed in pressure-sensitive copying sheet of the configuration in which color of the color former in the first color former microcapsule layer 6 and the color of the color former in the second color former microcapsule layer 8 is colored with a specific color by mixing Therefore, when information is written in an improper state on the transfer sheet 2 described above, only the color former of the first color former microcapsule layer 6 develops color in the developer layer 5, so that a preset color mixture is used. Therefore, it is easy to confirm whether or not a tampering action has been performed.
Thus, the back side of the transfer sheet in the case of proper use, copy image whereas there is copy image which is on purpose Jo of a particular color saturation, in the case of tampering the abuse on the back side of the transfer sheet but since no color in Japanese Jono colors, it is possible to easily determine the presence or absence of falsification if you look at the backside of the transfer sheet.
[0015]
In the embodiment shown in FIGS. 1 to 3, in the transfer sheet 2, the developer layer 5, the first color former microcapsule layer 6, and the back carbon ink layer 7 are laminated in this order from the transfer sheet 2 side. The present invention is not limited to this. That is, in the transfer sheet 2, it is sufficient that the first color former microcapsule layer 6 and the developer layer 5 are laminated between the transfer sheet 2 and the back carbon ink layer 7. Other embodiments shown in FIG. 4 can also be adopted.
In the embodiment shown in FIG. 4, the first color former microcapsule layer 6, the developer layer 5, and the back carbon ink layer 7 are laminated in this order from the transfer sheet 2 side, and the same as in the above embodiment. If the information is appropriately entered in the transfer sheet 2 as described above, a part of the back carbon ink layer 7 (entry corresponding part) is transferred onto the second color former microcapsule layer 8 of the receiving sheet 3, and the first, The microcapsules of the second color former microcapsule layers 6 and 8 are broken, and the color former is transferred to the developer layer 5, thereby producing a copy image. Furthermore, in the case with information only on the transfer sheet 2, as shown in the above embodiment, in a state where the color saturation is different from the predetermined ones will be copied image is generated, whereby the presence or absence of tampering Can be confirmed.
[0016]
In the above-described embodiment, an example of two-sheet copying has been described. However, the present invention is not limited to this, and can be implemented with three or more pressure-sensitive copying sheets. By the way, in the case of three copies, the transfer / reception sheet is sandwiched between the transfer sheet and the receiving sheet, and the hard layer and the second color former are arranged in this order from the transfer / reception sheet side to the opposite surface of the transfer / reception sheet. A microcapsule layer is laminated, and a developer layer, a first color developer microcapsule layer, a back carbon ink layer (or a first color developer microcapsule layer, a developer) are arranged in order from the transfer / receiver sheet side on the opposite surface on the receptor sheet side. What is necessary is just to make it the structure which provides a colorant layer and a back carbon ink layer).
[0017]
【The invention's effect】
As described above , according to the configuration of the present invention , when the information is appropriately described, both the color former of the first color former microcapsule layer and the color former of the second color former microcapsule layer are transferred to the developer layer. As a result, both of the color formers are surely colored, and a vivid color development portion having high color development intensity is generated. Therefore, it is possible to obtain an effect excellent in practicality, for example, it is easy to confirm whether or not there is copying on the back side of the transfer sheet.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing an example of a pressure-sensitive copying sheet for preventing falsification according to the present invention.
FIG. 2 is an explanatory diagram showing a correct use state for an example.
FIG. 3 is an explanatory diagram showing an illegal use state for an example;
FIG. 4 is an explanatory diagram showing another embodiment.
FIGS. 5A and 5B show a conventional example, in which FIG. 5A is an explanatory view showing a conventional back carbon pressure-sensitive copying sheet, FIG. 5B is an explanatory view showing a state of unauthorized use with respect to a transfer sheet, and FIG. It is explanatory drawing which shows the state of the unauthorized use with respect to a sheet | seat.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Pressure-sensitive copy sheet 2 for preventing tampering ... Transfer sheet 3 ... Receiving sheet 4 ... Binding 5 ... Developer layer 6 ... First color developer microcapsule layer 7 of transfer sheet 2 ... Back carbon ink layer 7a ... Corresponding part 7b ... Drop-off point 8 ... Second color former microcapsule layer 9 of receiving sheet 3 ... Hard layer 10 ... Color development part

Claims (1)

A pressure-sensitive copying sheet in which a transfer sheet and a receiving sheet are superimposed,
A first color former comprising a back carbon ink layer disposed on the opposite surface of the transfer sheet, and a color former that develops a color different from the back carbon ink between the transfer sheet and the back carbon ink layer. Laminating a microcapsule layer and a developer layer,
In a predetermined region facing at least the back carbon ink layer on the opposing surface of the receiving sheet, a second color former microcapsule layer containing a color former that develops a color different from the back carbon ink is provided,
The color when the color former of the first color former microcapsule layer is colored differs from the color when the color former of the second color former microcapsule layer is colored. A pressure-sensitive copying sheet for preventing falsification, which is provided in a different color from ink.

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