JP4404453B2 - 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, the 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 (artist) 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. 4B. 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 front side of the receiving sheet by transfer of the back carbon ink and copying on the back side of the transfer sheet by transfer of the color former were performed simultaneously. Is.
In the present invention, the object is to make the copy on the back side of the transfer sheet clearer and to make it easier to confirm the copy image. To do.
[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 superposed, and is different from the back carbon ink described below at a point on the opposite surface of the transfer sheet. A mixed layer formed by mixing a color former microcapsule containing a first color former that develops color and a developer is provided, and a back carbon ink layer is provided on the receiving sheet side of the mixed layer, on the opposite surface of the receiving sheet. In a predetermined region facing at least the back carbon ink layer, a color former microcapsule layer containing a second color former that develops a color different from that of the back carbon ink is provided, and the color when the first color former is colored and Unlike the color when the second color former is colored, the mixed color of the two color formers is provided in a different color from the back carbon ink. It provides tamper prevention pressure-sensitive copying sheet that is intended 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. On the surface of the transfer sheet 2 facing the receiving sheet 3, a mixed layer 5 and a back carbon ink layer 6 are laminated in order from the transfer sheet 2 side in an area corresponding to the entry field. In this case, color former microcapsules containing the first color former and a color developer are mixed. The first color former contained in the microcapsule has a function of developing a color different from that of the back carbon ink forming the back carbon ink layer 6 and is microencapsulated with the developer. The mixed layer 5 is configured as a self-coloring layer by combination with the first color former.
On the other hand, on the surface of the receiving sheet 3 facing the transfer sheet 2, the color former microcapsule layer 7 and the hard layer 8 are laminated in order from the transfer sheet 2 side in a predetermined region at least facing the back carbon ink layer 6. ing. Even the color former microcapsule layer 7 in the receiving sheet 3 is a transparent layer made of microcapsules containing a second color former that develops a different color from the back carbon ink of the back carbon ink layer 6 . The color development of both color formers is different from each other , and this will be described later.
The hard layer 8 is formed as an undercoat layer coated with an undercoat agent, and the second color former microcapsule layer 7 is provided on the hard layer 8.
[0007]
As the developer contained in the mixed 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. A zinc salt of a 2,2-bisphenolsulfone compound is preferable because of good storage stability of printing.
[0008]
As the first and second color formers contained in the microcapsules of the mixed layer 5 and the color former microcapsule layer 7, electron donating color formers can be used, for example, benzoylleucomethylene blue, p-nitrobenzoylmethylene blue, etc. Thiazine dyes, trianneal methane dyes such as 3,3-bis (p-dimethylaminophenyl) -6-dimethylaminophthalide, diphenitals such as 4,4-bis-dimethylaminobenzhydrylbenzyl ether It can be arbitrarily selected from methane dyes, spiro dyes such as 3-phenyl-spirodinaphthopyran, and fluorane dyes such as 3-piperidino-methyl-7-phenylaminofluorane. It is assumed that they are different.
[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.
The mixture of the microcapsules and the developer is preferably an ultraviolet curable ink that can be applied in a spot manner and can be dried quickly 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. The back carbon ink layer 7 is formed by laminating the back carbon ink on the mixed layer 5 using a printing technique or the like.
[0010]
The type of the undercoat agent for forming the hard layer 8 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 6a of the back carbon ink layer 6 becomes the color former micro of the receiving sheet 3 as shown in FIG. It is transferred onto the capsule layer 7 and copied. Then, by the pressurization by filling, the microcapsules of the mixed layer 5 and the color former microcapsule layer 7 are broken, and the color former comes out from both layers.
The second color former from the receiving sheet 3 side passes through the drop-off portion 6 c of the back carbon ink layer 6 and is transferred to the mixed layer 5, so that the mixed layer 5 develops color. Develops color. That is, self-coloring occurs in the mixed layer 5 while the color of the second color former is added . The color development was colored coloring unit 9 can be easily visually recognized because that is different from the color of the back carbon ink as described below.
Further, since the lower layer of the color former microcapsule layer 7 is a hard layer 8 and is hard, the color former microcapsule layer 7 is pressed against the hard layer 8 when written, and the microcapsules in the pressurized portion are It will surely be destroyed. Therefore, the second color former of the color former microcapsule layer 7 can easily reach the mixed layer 5, and from this point, the color development portion 9 can be vividly colored.
[0012]
As described above, each of the first color former and the second color developer develops a different color from the back carbon ink by reacting with the developer in the mixed layer. Then, first, in each second color former, together with alone selects those coloring in different colors, its color as a mixed color in a light emitting portion 9 described above is unique in the back carbon ink A combination of agents has been selected .
[0013]
The mixing ratio of the developer and the microencapsulated color former (first color developer) in the mixed layer 5 is 1000 to 10 parts by mass, preferably 500 to 20 parts by mass with respect to 100 parts by mass of the developer. Part, more preferably 400 to 25 parts by weight.
[0014]
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, when an incorrect description item is entered on the transfer sheet 2, the corresponding portion 6 a of the back carbon ink layer 6 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 action is performed, the second color former does not transfer because there is no receiving sheet.
[0015]
The transfer sheet 2 alone when describing the information, the color former microcapsules contained in the mixed layer 5 provided on the transfer sheet 2 is broken and mixed layer 5 will be self-colored, the first color former When the information is described in an improper state on the transfer sheet 2 described above, the color development of the second color former and the color development of the second color former are mixed to cope with the pressure-sensitive copying sheet having the above configuration. Since only the first color former develops color (self-coloring) in the mixed layer 5, it does not produce a color with a preset color mixture, and therefore it is easy to confirm whether or not a tampering action has been performed.
Thus, the correct case of using the transfer sheet back side, 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 back side of the transfer sheet.
[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 colorant microcapsule are sequentially arranged from the transfer / reception sheet side to the opposite surface of the transfer / reception sheet. The layers may be laminated, and a mixed layer and a back carbon ink layer may be provided in order from the transfer / receiving sheet side on the opposite surface on the receiving sheet side.
[0017]
【The invention's effect】
As described above , according to the configuration of the present invention , when information is appropriately described, it is ensured that both the first color former and the second color former are colored in the mixed layer, and the color development intensity is high. A vivid colored portion is produced. 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;
FIGS. 4A and 4B show a conventional example, in which FIG. 4A is an explanatory view showing a conventional back carbon pressure-sensitive copying sheet, FIG. 4B 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 ... Tamper-proof pressure-sensitive copy sheet 2 ... Transfer sheet 3 ... Receiving sheet 5 ... Mixed layer 6 ... Back carbon ink layer 6a ... Corresponding part 6b ... Remaining layer 6c ... Drop-off place 7 ... Color former microcapsule layer 8 ... Hard layer 9 ... Color development part

Claims (1)

A pressure-sensitive copying sheet in which a transfer sheet and a receiving sheet are superimposed,
A mixed layer formed by mixing a color former microcapsule containing a first color former that develops a color different from the back carbon ink described later and a developer is provided at a point on the opposite surface of the transfer sheet. Back carbon ink layer is provided on the receiving sheet side of
In a predetermined region facing at least the back carbon ink layer on the opposing surface of the receiving sheet, a color former microcapsule layer containing a second color former that develops a color different from the back carbon ink is provided,
The color when the first color former is colored differs from the color when the second color former is colored, and the mixed color of the two colorants is provided in a different color from the back carbon ink. Pressure-sensitive copying sheet for preventing tampering.

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