JP2001239753A - Pressure-sensitive copying sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure-sensitive copying sheet which is of a non-carbon required type and capable of duplicating confidential information and further, is free from such a trouble that a wax-type transitional fluorescent ink penetrates a base to cause a seepage phenomenon and consequently, a duplication failure occurs, or a strike-through of the ink to the opposite face of the base is generated. SOLUTION: A desensitizing ink layer 7 is formed at least at a part of the surface side of a receptive sheet 2 and the wax-type transitional fluorescent ink layer 5 is formed in a region opposite to the desensitizing ink layer 7 on the back side of the copying sheet 2 through a peelable overprint varnish layer 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pressure-sensitive copying sheet, and more particularly, to a pressure-sensitive copying sheet having a function of preventing leakage of secret information.

[0002]

2. Description of the Related Art Conventionally, according to a pressure-sensitive copying sheet, information written on the copying sheet is visually copied to a receiving sheet. However, in some cases, a function of making the information copied on the receiving sheet invisible becomes necessary. For example,
In pressure-sensitive copying sheets used in financial institutions and credit company applications, in order to prevent leakage to anyone other than the parties (applicant and person in charge), the secrets such as the amount and password of the entry are The information is formed with fluorescent ink so that the confidential information is not visible even at first glance at the entry field, and when the confidential information is viewed by the person in charge, a black lamp (ultraviolet light of a specific wavelength) is applied to the entry field to fluoresce. A technique (for example, Japanese Utility Model Application Laid-Open No. 60-184673) has been conceived in which entries can be read by emitting ink.

In the above-described pressure-sensitive copying sheet, a transferable fluorescent ink containing a fluorescent dye or a fluorescent pigment which fluoresces when irradiated with ultraviolet rays is generally used as the fluorescent ink for forming secret information. Can be The transferable fluorescent ink includes a fluorescent dye such as a diaminostilbene type, a triphenyl type, a thiazine type, a xanthene type, a synthetic resin containing these, a fluorescent organic pigment or an inorganic pigment, a paraffin wax, Wax type and wax type which are contained in carnauba wax, and offset type which is contained in a UV curable substance mainly containing a photopolymerizable monomer or oligomer and a photopolymerization initiator. In particular, a wax-type transferable fluorescent ink is in great demand because of its good transferability. When this wax-type transferable fluorescent ink is used, conventionally, a wax-type back carbon ink similar to this ink configuration is used. A pressure-sensitive copying sheet dedicated to back carbon using a carbon black has been used. Recently, however, there has been a demand among users for using a carbonless type pressure-sensitive copying sheet because the back carbon type pressure-sensitive copying sheet is rubbed and stained.

[0004]

Normally, a carbonless type pressure-sensitive copying sheet is a copy sheet having a coloring agent microcapsule layer on the back surface of a substrate, and reacting with the coloring agent on the surface of the substrate. It is constructed by combining with a receiving sheet having a color developer layer that realizes color development, but the base material of this type of pressure-sensitive copying sheet is a wax-type Because the ink acceptability is not considered, the wax component of the ink penetrates the base material and seeps into it, making it difficult to copy well and obscure entries, or seeping out on the opposite side of the base material. And could not be adopted until now.

Accordingly, the present invention is a carbonless type pressure-sensitive copying sheet capable of copying confidential information, wherein a wax-type transferable fluorescent ink penetrates into a base material and bleeds into the base material to cause a copy failure. It is an object of the present invention to provide a pressure-sensitive copying sheet in which bleeding to the opposite side of a material is prevented.

[0006]

As a specific means for achieving this object, a pressure-sensitive copying sheet of the present invention comprises a copying sheet having a coloring agent microcapsule layer on the back surface of a substrate, In a pressure-sensitive copying sheet comprising a receiving sheet having a color developer layer that reacts with the color forming agent on the surface to realize color development, a desensitizing ink layer is provided on at least a part of the receiving sheet surface side. In addition, a wax-type transferable fluorescent ink layer is applied to a region facing the desensitizing ink layer on the back side of the copy sheet via a peelable overprint varnish layer.

According to the pressure-sensitive copying sheet of the present invention having such a configuration, since the peelable overprint varnish layer is interposed between the base material and the wax-type transferable fluorescent ink layer, the secret information Since the transferable fluorescent ink layer is easy to peel off at the time of writing and is prevented from penetrating into the surface of the transferable fluorescent ink layer, the transfer to the desensitizing ink layer on the receiving sheet is performed well, and clear secret information is obtained. Is obtained. Further, since the pressure-sensitive copying sheet of the present invention is of a carbonless type, it does not suffer from rubbing and dirt as compared with the conventional back carbon type.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a pressure-sensitive copying sheet using carbonless paper according to the present invention will be described with reference to the accompanying drawings. 1 is a cross-sectional explanatory view of the pressure-sensitive copying sheet, and FIG. 2 is a cross-sectional explanatory view showing a use state of the pressure-sensitive copying sheet of FIG. 1. In FIG. 1, reference numeral 2 denotes a coloring agent microcapsule layer ( Transfer sheet 3 having a developer layer (not shown) on the surface of the base material, and both are bound at a binding 4 at one end. Together, they constitute a pressure-sensitive copy sheet 1. A releasable overprint varnish layer 5 is provided on the back side corresponding to an entry column (not shown) provided on the front side of the transfer sheet 2, and a wax-type transferable fluorescent ink layer 6 is provided on the layer. Is provided.

The overprint varnish used for the releasable overprint varnish layer 5 is usually a transparent or varnish used for the purpose of giving gloss to a printed matter, protecting a printed surface and improving abrasion resistance, and the like. It is a translucent paint, and in the present invention, a peeling property is required, so that a cured film having high smoothness is good, or a peeling agent such as silicon for imparting peelability is added. Are also preferred.
In addition, various types of overprint varnishes, such as an oxidative polymerization drying type for offset lithographic or letterpress, a solvent type, an aqueous type, a thermosetting type, and an ultraviolet curable type, are commercially available. The releasable overprint varnish layer 5 can be suitably formed by coating or printing the back surface of the transfer sheet 2 with a printing machine, a gravure printing machine, a special varnishing machine, or the like.

A desensitizing ink layer 7 is formed on the receiving sheet 3 in a region corresponding to the entry area of the transfer sheet 2, that is, in a region on the front surface located immediately below the transferable fluorescent ink layer 6. As the desensitizing ink, conventionally known inks may be used. For example, a desensitizing agent and an ultraviolet absorber are mixed by heating, and after cooling, an organic solvent is added as desired. Can be used. It is preferable to use a butylene oxide adduct of an amine as the desensitizer, since the desensitizing effect of the obtained desensitizing ink layer 7 becomes particularly high. This desensitizing ink layer 7
It can be formed by coating or printing means.

The pressure-sensitive copying sheet 1 constructed as described above
As shown in FIG. 2, when a character or a number is entered in an entry field of the transfer sheet 2 with a ball-point pen or the like at the time of use, the corresponding portion 6a of the transferable fluorescent ink layer 6 is peeled off by the writing pressure. 5 and transferred to the desensitizing ink layer 7 of the receiving sheet 3.

When used for an application form of a financial institution or a credit company, the above-mentioned entry column contains an amount of confidential information,
A personal identification number or the like is to be entered. After the entry, the transfer sheet 2 is cut out along the perforations (not shown) of the binding 4, and the transfer sheet 2 is stored by the applicant, and the receiving sheet 3
To the person in charge.

[0013] In the submitted receiving sheet 2, it is not possible to visually see what is entered in the entry field,
When the person in charge irradiates ultraviolet rays with a black lamp,
Since the mixed layer contains a fluorescent material, it emits fluorescence, and characters, numerals, and the like written by the fluorescence can be read. Therefore, confidential information does not leak to anyone other than the parties. As the ultraviolet irradiation means, a mercury lamp, a metal halide lamp, or the like can be used in addition to the black lamp.

As described above, since the transferable fluorescent ink layer 6 is provided on the releasable overprint varnish layer 5, it is easy to peel off between the layers. And completely transferred from the overprint varnish layer 5 to the desensitizing ink layer 7. Thereby, the transfer of the transferable fluorescent ink is favorably performed, and the copy to the desensitizing ink layer 7 becomes clear. Further, before writing, the transferable fluorescent ink layer 6 does not permeate the transfer sheet 2 and ooze out on the surface because the peelable overprint varnish layer 5 performs an immersion preventing action. Therefore, the pressure-sensitive copy sheet 1 can be stored in a clean state without contamination.

Although the above embodiment has been described with reference to a two-sheet copy sheet, the present invention is not limited to this and can be applied to a three-sheet or more copy sheet. In the case of three-sheet spelling, a transfer / receiving sheet (paper without carbon) is provided between the transfer sheet and the receiving sheet, a desensitizing ink layer is provided on the front surface of the sheet, and a releasable overprint varnish is provided on the back surface. A layer and a transferable fluorescent ink layer may be provided.

[0016]

As described above, the pressure-sensitive copying sheet according to the present invention has a releasable overprint varnish layer between a base material of carbonless paper and a wax-type transferable fluorescent ink layer. When the secret information is entered, the transferable fluorescent ink layer is easily peeled off and is prevented from penetrating into the surface of the transferable fluorescent ink layer, so that the transfer to the desensitizing ink layer on the receiving sheet is performed well. A clear copy of confidential information is obtained. Furthermore, because it is a carbonless type,
Compared with the conventional back carbon type, the effect is extremely remarkable, for example, no rubbing dirt is generated.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view of a pressure-sensitive copying sheet of the present invention.

FIG. 2 is an explanatory sectional view showing a use state of the pressure-sensitive copying sheet of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pressure-sensitive copying sheet 2 ... Transfer sheet 3 ... Receiving sheet 4 ... Binding 5 ... Releasable overprint varnish layer 6 ... Transferable fluorescent ink layer 7 ... Desensitizing ink layer

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H085 AA05 AA07 BB02 BB21 CD00 FE00 FE02 FE03 FE05 FE07 FE12 GG04

Claims (1)

[Claims] 1. A copy sheet having a color-developing agent microcapsule layer on the back surface of a substrate, and a receiving sheet having a color-developing agent layer on the surface of the substrate which reacts with the coloring agent to realize color development. In the pressure-sensitive copying sheet, a desensitizing ink layer is applied to at least a part of the front surface side of the receiving sheet, and a releasable overcoat is formed on the back side of the copying sheet in a region facing the desensitizing ink layer. A pressure-sensitive copying sheet having a wax-type transferable fluorescent ink layer applied via a print varnish layer.