JPH1016450A - Pressure sensitive copy sheet set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a lower sheet to be copied without using one-time carbon sheet using transferable carbon ink of the prior art or without using a self-color developing sheet as the lower sheet even if an upper sheet of a pressure sensitive copy sheet set in which information filled in or printed on the upper sheet is copied to the lower sheet cannot be provided with a copy means. SOLUTION: The pressure sensitive copy sheet set comprises an upper sheet 2 having a fill-in column 5a on a predetermined part of a front surface side, a lower sheet 3 coated with developer coating liquid A at the front surface side and having a copy fill-in column 5b corresponding to the column 5a and superposed on the sheet 2, and a copy sheet 4 coated with color developer microcapsule coating liquid B on its rear surface side and interposed between the sheets 2 and 3 to be separably integrated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive copying sheet set in which a copying sheet is interposed between an upper sheet and a lower sheet as a carbonless pressure-sensitive copying means. The present invention relates to a pressure-sensitive copying sheet set in which a coloring agent microcapsule coating liquid is applied to a sheet surface such as a thin paper or a thin film used for carbon paper.

[0002]

2. Description of the Related Art As a copying means in a conventional pressure-sensitive copying sheet set, transferable carbon ink is applied to the back surface of an upper sheet, or thin paper (commonly called "one-time carbon paper") coated with transferable carbon ink. ) Is interposed between the upper sheet and the lower sheet, and the carbon method of forming a transfer image of carbon ink on the lower sheet is started.
The carbonless method of forming a color image on the lower sheet by the reaction between the color former and the color developer by combining the upper sheet coated with the color former microcapsule paint and the lower sheet coated with the color developer paint is currently used. It became mainstream. Recently, spotless carbon copying means using a color former microcapsule ink or a developer ink has been put to practical use.

[0003]

In such a pressure-sensitive copying sheet set, there is a case where the upper sheet must be made of ordinary paper having no copying means. For example, when a high-order sheet is used as a pressure-sensitive copy sheet group such as a machine-readable form or a security such as securities, misreading occurs due to color stain or discoloration of the upper sheet, which hinders authenticity determination. Due to the danger, copying means could not be applied.

When a pressure-sensitive copying sheet set is constructed without giving any copying means to the upper sheet, as described above, one-time carbon paper is interposed between the upper sheet and the lower sheet, and the carbon ink is used. A method of forming a transfer image on the lower sheet can be considered. However, according to this method, since the transferability of the carbon ink is extremely high, when the used one-time carbon paper is pulled out with a hand or a tool, not only the carbon ink is transferred to the hand and the tool but also becomes dirty. Further, there is a risk that the carbon ink is transferred to the upper sheet.

A method of applying a self-coloring agent, which is a mixture of a coloring agent microcapsule coating material and a developing agent coating material, to the surface side of the lower sheet is conceivable. However, there is a risk that the separated lower sheet alone causes color stain. This is not preferable when the lower sheet is stored as a copy of the upper sheet.

Therefore, the present invention is a pressure-sensitive copying sheet set in which information written or printed on an upper sheet is copied to a lower sheet, and even if the upper sheet cannot be provided with copying means, the present invention is not limited to the conventional one. Another object of the present invention is to provide a new pressure-sensitive copying sheet set which can be copied to a lower sheet without using a one-time carbon paper using a transferable carbon ink or a lower sheet as a self-coloring paper.

[0007]

In order to solve such a problem, the present inventor has proposed a pressure-sensitive copying sheet set in which an upper sheet and a lower sheet are superimposed, instead of using a conventional one-time carbon paper. , A pressure-sensitive copy sheet in which a carbonless copy sheet with a colorant microcapsule coating liquid applied to the sheet surface is interposed between the upper sheet and the lower sheet with a developer coating liquid applied to the surface side I came up with a pair.

That is, the pressure-sensitive copying sheet set of the present invention
An upper sheet having an entry column at a predetermined portion on the front side and a lower sheet having a copy entry column corresponding to the entry column with a developer coating liquid applied to the front side are superimposed, and furthermore, the upper sheet and the lower sheet It is characterized in that a copy sheet formed by applying a coloring agent microcapsule coating liquid on the back side is interposed between the sheets, and is integrated in a separable manner.

In particular, the pressure-sensitive copying sheet set of the present invention
The copy sheet is obtained by applying a coloring agent microcapsule coating solution to a thin sheet surface such as a thin paper or a thin film.

Further, in the pressure-sensitive copying sheet set of the present invention, the above-mentioned coloring agent microcapsule coating solution contains microcapsules in which the surface of the capsule wall material is coated with a substance having an affinity for the ink vehicle in an oil-based ink vehicle. It is characterized by being an oil-based ink containing a color former microcapsules dispersed with a particle size of 5 μm or less.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiment of the present invention, in which a pressure-sensitive copying sheet set according to the present invention is used as a product application form, and its drawings will be described in further detail. Here, FIG. 1 is a schematic exploded perspective view of the pressure-sensitive copying sheet set of the present invention, FIG. 2 is a sectional explanatory view of the pressure-sensitive copying sheet set of the present invention, and FIG. 3 is a pressure-sensitive copying sheet set of the present invention. FIG. 3 is an explanatory diagram of a state of an application pattern of a color former microcapsule coating liquid on a copy sheet in FIG.

As shown in FIGS. 1 and 2, the pressure-sensitive copying sheet set 1 of the present embodiment is a product application form, and the “account number”, “name”, “ Amount of money",
The upper sheet 2 having an entry column 5a for entering an "ID number" or the like and an OMR optical reading marking column 6 for selecting a product, and a developer coating solution A is applied to the front surface side. "Account Number", "Name", "Amount",
A lower sheet 3 having a copy entry field 5b for copying and entering an "ID number" or the like is overlapped, and a color former microcapsule coating liquid B is applied to the back surface between the upper sheet 2 and the lower sheet 3. In this manner, four copy sheets are interposed, and the respective sheets are integrated so as to be separable by an adhesive 7 and a cut-out sewing line 8.

The upper sheet 2 is made of ordinary high-quality paper without any copying means, and optically reads this information by marking the marking field 6 for optical reading specified by the applicant. On the other hand, lower sheet 3
In the case of the present embodiment, a conventional pressure-sensitive copying paper is used.
In this method, a developer coating solution obtained by mixing an electron-accepting resin, clay, a white pigment and the like with an aqueous binder such as starch is applied by a special coater. However, in a case where the base material of the lower sheet 3 is not a conventional pressure-sensitive copying paper but a normal high-quality paper, the developer coating A may be replaced with the following ink type.

The ink type developer coating solution is, for example,
It is obtained by dissolving oil-soluble phenol-formalin resin, acid clay or aromatic carboxylic acid derivative in a low-boiling organic solvent such as aromatic hydrocarbon, alcohol and ester together with a surfactant such as alkylbenzene sulfonate. In order to enhance the writing characteristics or printability of the coating layer surface of the developer coating liquid A, more preferably, a white pigment such as titanium oxide, zinc oxide, or calcium carbonate is added to prepare a developer ink. is there.

The base material of the copy sheet 4 interposed between the upper sheet 2 and the lower sheet 3 is not particularly limited, but the thickness thereof is determined in consideration of the copy efficiency to the lower sheet 3. Then, it is preferable to use a paper having a basis weight of about 25 g / m ² like a conventional one-time carbon paper. In addition, when the following color former microcapsule ink is used, it is effective to apply to a thin film made of synthetic resin or synthetic paper having the same weight as the basis weight of the thin paper. It is not limited to.

The color forming agent microcapsule coating solution B used in the present invention is prepared by converting the color forming agent microcapsule forming liquid used in the construction of paper for pressure-sensitive copying into an aqueous binder such as polyvinyl alcohol and a protective material such as starch. A water-based paint type obtained by mixing the above-mentioned components may be used, but a conventionally known flexo ink type or a hot melt type ink is preferable, and more preferably, JP-A-7-216273. Gazette and Japanese Patent Laid-Open No. 8-399
It is preferable to use a microcapsule ink containing a color former prepared based on a microcapsule-containing oil-based coating liquid and a method for producing the same disclosed in JP-A-28.

[0017] The microcapsule ink of the color former includes, for example, a leuco dye as a core color former, a partial hydrolyzate of styrene-maleic anhydride having an acid catalyst and an emulsifying function, melamine or urea and formalin, or Using these prepolymers, a urea-formalin resin is formed by an in-situ method, and a color developing agent microcapsule produced using the urea-formalin resin as a capsule wall material is coated with the capsule wall material and an ink vehicle in such a state as to cover the capsule wall material. Substances that have an affinity for both, for example,
A state in which a layer of a lower alcohol such as glycerin is provided, and water is selectively vaporized and removed using a vacuum distillation method, whereby the color former microcapsules generated in an aqueous system are covered with a solvent layer. And obtained by substituting in a dispersed state in the ink vehicle.

With the color former microcapsule ink prepared as described above, the microcapsules in the ink vehicle can be used without impairing the physical properties such as elasticity and strength at the time of production, and the plurality of capsules can be connected to each other. Do not produce so-called secondary agglomeration, which combine to form enlarged particles,
Since the average particle size can be set to 5 μm or less as in the case of forming the capsule, the capsule is not broken by the kneading roller of the printing unit. Therefore, it is optimal as an ink containing a color former microcapsule.

As shown in FIG. 3A, the coloring agent microcapsule coating liquid B on the copy sheet 4 may be applied to the entire rear surface side. With the above color former microcapsule ink,
By making the ink vehicle a UV-curing type commonly used for printing inks, an offset printing machine or the like can be used to copy the lower sheet 3 into the copy entry field 5b as shown in FIG. The coloring agent microcapsule coating liquid B can be applied in a spot only to the corresponding predetermined portion, that is, the portion requiring copying.

As for the use of the pressure-sensitive copying sheet set of the present embodiment, when each sheet is separated after writing and copying information on the upper sheet, the copy sheet 4 is discarded as it is, and the upper sheet 2 is replaced by a machine. After reading, it is bound and stored in the left marginal punch hole, and the lower sheet 3 is a copy for the upper sheet applicant.

[0021]

As described above, the pressure-sensitive copying sheet set of the present invention can be used as a conventional one-time carbon paper using a transferable carbon ink even when the upper sheet cannot be subjected to copying means. This is a new set of pressure-sensitive copying sheets that can be copied to the lower sheet without using a lower sheet or self-coloring paper, so when using used one-time carbon paper with hand or tool In particular, carbon ink does not transfer to hands and tools and stains, and carbon ink does not transfer to upper sheets or lower sheets consisting of separated self-colored paper do not cause color stains alone. It is effective.

[Brief description of the drawings]

FIG. 1 is a schematic exploded perspective view of a pressure-sensitive copying sheet set of the present invention.

FIG. 2 is an explanatory sectional view of a pressure-sensitive copying sheet set according to the present invention.

FIG. 3 is an explanatory diagram of a state of an application pattern of a color former microcapsule coating liquid on a copy sheet in the pressure-sensitive copy sheet set of the present invention.

[Explanation of symbols]

 Reference Signs List 1 pressure-sensitive copy sheet set 2 upper sheet 3 lower sheet 4 copy sheet 5a entry field 5b copy entry field 7 adhesive 8 cut-out sewing line A developer color coating solution B color developer microcapsule coating solution

Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number in the agency FI Technical display location B42D 11/00 B41M 5/12 112

Claims (3)

[Claims] 1. An upper sheet having an entry column in a predetermined portion on the front side and a lower sheet having a copy entry column corresponding to the entry column coated with a developer coating liquid on the front side,
Further, a pressure-sensitive copying sheet set in which a copying sheet formed by applying a coloring agent microcapsule coating liquid on the back side is interposed between the upper sheet and the lower sheet, and is separably integrated. 2. The pressure-sensitive copying sheet set according to claim 1, wherein the copying sheet is formed by applying a colorant microcapsule coating solution to a thin sheet surface such as a thin sheet of paper or a thin film. 3. The microcapsule in which the surface of a capsule wall material is coated with a substance having an affinity for the ink vehicle, wherein the color former microcapsule coating liquid is contained in an oil-based ink vehicle.
2. An oil-based ink containing a color former microcapsules dispersed with an average particle size of 5 [mu] m or less.
A pressure-sensitive copying sheet set according to claim 2.