JPH05270121A - Two-component coloring sheet - Google Patents

Abstract

PURPOSE:To provide a new two-component coloring sheet in which a colored pattern can be observed from the surface of one base sheet pressed to a specified degree and coloring occurs at the interval of a short time after pressurization or in a non-pressurized state. CONSTITUTION:The subject two-component coloring sheet consists of a microcapsule coloring agent layer 2 with a core material of liquid coloring agent, a liquid-permeable sheet 4 and a color developer which develops a color of coloring agent provided in that order, on the surface of a base sheet 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color-forming sheet using a two-component color-developing agent capable of developing color by contacting one color-developing agent or color-developing agent with the other color-developing agent or color-developing agent.

[0002]

2. Description of the Related Art A conventional coloring sheet using a two-component coloring agent capable of coloring by contact between one coloring agent and the other developing agent has a predetermined coloring agent on the back surface of one base sheet, for example. A microcapsule coloring agent layer in which microcapsules formed by encapsulating cells by a coacervation method using a predetermined resin core material as a core material and dispersed in a predetermined resin binder are provided, and the other base material sheet There is one in which a color developer layer for coloring the color former is provided on the surface.

After the back surface of one of the base material sheets is superposed on the surface of the other base material sheet, an appropriate writing pressure is applied from the surface of the one base material sheet with a hard writing tool such as a pole pen to write the back surface. Of the microcapsule colorant is destroyed, the liquid colorant in the capsule comes into contact with the developer layer on the surface of the other base sheet to cause a color reaction, and the handwriting on the surface of the other base sheet conforms to the writing pressure. The pattern is to be colored.

[0004]

In the above-mentioned conventional two-component color-developing sheet, a color-developing agent and a color-developing agent are provided on the inner surface side of the superposing one base sheet and the other base sheet, respectively. The color development pattern developed by the writing pressure was not observable from the surface side of one of the base material sheets.

Further, the above-mentioned conventional two-component color developing sheet is generally used as a non-carbon paper, and it is required that the color developing immediately after the writing pressure is applied.

According to the present invention, in the above-described two-component color-developing sheet, the color-developing pattern can be observed from the surface of the one base sheet to which a predetermined pressure is applied, and after the pressure is applied, or after no pressure is applied. It is an object of the present invention to provide a novel two-component type color development sheet that develops color at a time interval in a pressurized state.

[0007]

The first invention of the present invention is as follows:
A microcapsule color-developing layer 2 having a liquid color-developing agent as a core material, a liquid-permeable sheet 4, and a color-developing layer 5 for developing the color-developing agent in this order are provided on the surface of the base sheet 1. Is a two-component coloring sheet.

The second invention of the present invention is the base sheet 1
Sheet A having a microcapsule color developing agent layer 2 having a liquid color developing agent as a core material on its surface, and Sheet B having a liquid developing agent layer 5 for developing the color developing agent on the surface of a liquid-permeable sheet 4. And the color developing agent layer 2 side of the sheet A and the sheet B
In the two-component color developing sheet, the pressure-sensitive adhesive layer 3 is provided on either or both sides of the liquid permeable sheet 4.

[0009]

EXAMPLES The first aspect of the present invention will be described in detail below with reference to the examples. FIG. 1 shows an example of the two-component color developing sheet of the present invention. It is possible to use a paper sheet such as a printing paper, a synthetic paper, a synthetic resin film, or the like.

The microcapsule color-forming agent layer 2 provided on the substrate sheet 1 is colorless or such as a triphenylmethane-based lactone compound, a phenothiazine-based lactone compound, a fluorane-based lactone compound, and a spiropyran-based lactone compound which are colored by a predetermined developer. A light-colored leuco dye (for example, crystal violet lactone, malachite green lactone, benzoyl leuco methylene blue, or a mixture thereof) is used as an oil-soluble nonvolatile organic solvent (for example, alkylnaphthalene, diallyl alkane, alkyl biphenyl, or other nonvolatile solvent). The core material dissolved in (organic solvent) is emulsified and dispersed in an aqueous solution of water-insoluble gelatin, gum arabic, etc. which is not compatible with the core material, and gelatin, gum arabic, etc. are used as capsule materials by the coacervation method. Microencapsulated Te 5μ
A microcapsule color-developing agent having a size of about m to 15 μm dispersed in a resin binder (binder) of the same or different type as the core material is provided on the entire surface of the base sheet 1 as shown in FIG. Is.

A liquid permeable sheet 4 is adhered to the surface of the substrate sheet 1 provided with the color former layer 2 via the microcapsule color former liquid or an adhesive layer 3 made of an adhesive or a pressure sensitive adhesive as appropriate. It is a thing. In addition, as an embodiment of the present invention, as shown in FIG. 1, a case where the liquid permeable sheet 4 is laminated and adhered to the base material sheet 1 via the adhesive layer 3 made of an adhesive material will be described as an example.

As the pressure-sensitive adhesive material constituting the adhesive layer 3, a predetermined pressure-sensitive adhesive (for example, rubber-based pressure-sensitive adhesive using a tackifier such as natural rubber or styrene-butadiene rubber and polyterpene resin), butyl acrylate. Acrylic pressure-sensitive adhesive using a copolymer of acrylic acid and acrylic acid), etc., is an organic or inorganic fibrous ultra-thin sheet, thin paper, non-woven fabric, Japanese paper, or synthetic resin that has a relatively good resin impregnation property. It is possible to use a sheet-made sheet impregnated with a support.

The liquid-permeable sheet 4 is, for example, a paper sheet, a non-woven sheet, a felt-like sheet, a woven cloth sheet such as gauze, and its liquid-permeability is such that the quality of paper and the roughness of fibers constituting the sheet 4 are large. , Can be appropriately set by adjusting the thickness and the like.

The developer layer 5 provided on the surface of the liquid permeable sheet 4 is an active clay-based developer such as kaolin clay, which is an acid clay (activated clay), or the like, which causes the color former to develop color. A resin type developer such as phenol resin, maleic acid resin or aromatic carboxylic acid is applied and used. If necessary, a transparent resin may be coated on the developer layer 5 or a transparent resin film may be laminated on the developer layer 5 to form a surface protective layer.

The two-component color-developing sheet in one embodiment (FIG. 1) of the first invention described above is appropriately applied to a pressing means such as a ballpoint pen, a writing brush, a pressure plate, and a pressure roller from above the developer layer 5. As shown in FIG. 2A, the capsule of the microcapsule color-developing agent layer below the pressurizing portion (writing pressure portion) 10 is broken by writing and pressurizing, and FIG. As shown in FIG.
2 leaks out, and the leaking color developer 12 penetrates through the adhesive material layer 3 and the liquid permeable sheet 4 on the upper side thereof, reaches the developer layer 5, and develops the color in the area of the pressurizing section 10. The color-developed portion 13 having a pressure pattern is formed on the agent layer 5. As a result, the coloring portion 13
Is what can be observed from the surface of the two-component color developing sheet.

The speed at which the above-mentioned color developer 12 that permeates the adhesive layer 3 and the liquid permeable sheet 4 reaches the upper developer layer 5 depends on the fiber density, thickness, or the liquid density of the liquid permeable sheet 4 to be used. By appropriately selecting the capsule wall thickness of the microcapsule coloring agent, the capsule hardness, or the liquid viscosity of the core material (liquid coloring agent) enclosed in the capsule, the penetration of the coloring agent 12 to the developer layer 5 is reached. Adjusting the speed, the elapsed time after applying the writing pressure to the two-component coloring sheet,
It enables identification by minutes, hours, or days.

FIG. 3 shows another embodiment of the first invention, in which the color developer liquid is partially applied in a predetermined pattern on the surface of the base sheet 1 to form the microcapsule color developer layer 2. It is provided partially.

In the two-component color-developing sheet shown in FIG. 3, the microcapsule color-developing agent layer 2 is provided in a predetermined pattern, so that the two-component color-developing sheet is pressed by a pressing means such as a roller (nip roller). By applying pressure to the entire surface of the color developing agent layer 2 to destroy the microcapsules, the developer layer 5 on the surface of the two-component color developing sheet is
A pattern having the same shape as that of the color former layer 2 is colored.

Next, the second invention of the present invention will be described in detail with reference to an embodiment. FIG. 4 shows an embodiment of the two-component coloring sheet of the second invention, in which the surface of the substrate sheet 1 is covered. The sheet A provided with the microcapsule color developing agent layer 2 and the sheet B having the color developing agent layer 5 provided on the surface of the liquid permeable sheet 4 can be attached and fixed by the adhesive layer 3 made of an adhesive material. It is a component-based coloring sheet.

As the base material sheet 1 constituting the sheet A, a paper sheet such as an ordinary printing paper similar to that used in the first invention, a synthetic paper, a synthetic resin film or the like can be used. ..

As the microcapsule color former layer 2 provided on the base sheet 1, a suitable color former (a color former similar to the one used in the first invention) that develops color with a predetermined developer is suitably used as an oil-soluble material. A microcapsule coloring agent is prepared by encapsulating a core material dissolved in an organic resin solvent (the same solvent as used in the first invention) into a capsule material such as gelatin or gum arabic by a coacervation method to form a microcapsule. The coloring agent liquid dispersed in a resin binder (binder) of the same or different quality as the core material is provided on the entire surface of the base material sheet 1 or partially in a desired pattern.

As the liquid-permeable sheet 4 constituting the sheet B, a paper sheet, a non-woven sheet, a felt-like sheet, a woven sheet such as a gauze sheet can be used, as in the case of the first invention. The liquid permeability can be appropriately set by adjusting the paper quality, the roughness and the thickness of the fibers constituting the liquid permeable sheet 4.

The color developer layer 5 provided on the surface of the liquid permeable sheet 4 is an acid clay which is capable of developing a color-developing agent such as crystal violet lactone or fluorane compound similar to that used in the first invention. , Phenol resin, aromatic carboxylic acids, etc. are applied and used.
If necessary, it is possible to coat the developer layer 5 with a transparent resin or laminate a transparent resin film to provide a surface protective layer.

In the second invention, the sheet A is used.
The adhesive layer 3 made of an adhesive material is laminated on either the front surface of the microcapsule color developing agent layer 2 or the back surface of the sheet B. In FIG. 4, the adhesive layer 3 is laminated on the back surface of the sheet B, and as the adhesive material forming the adhesive layer 3, a predetermined adhesive (for example, natural rubber, styrene butadiene rubber, etc. and polyterpene resin) is used. Such as rubber-based pressure-sensitive adhesives using tackifiers, acrylic pressure-sensitive adhesives using copolymers of butyl acrylate and acrylic acid, etc.) A fibrous ultrathin sheet, thin paper, non-woven fabric, Japanese paper, or synthetic resin sheet impregnated with a support is used.

The two-component color-developing sheet of the second invention constituted by the sheet A and the sheet B as described above is shown in FIG.
As shown in FIG. 3, the sheets A and B can be attached to each other via the adhesive layer 3 made of a pressure-sensitive adhesive and used in the same manner as in the first invention.
After adhering the sheet B and the sheet B, the developer layer 5 is allowed to stand for several days, so that the color developer layer 5 is colored by the color developer that naturally flows out from the inside of the capsule of the microcapsule color developer layer 2, and the elapsed time such as an indicator is increased. You may use it as a standard of.

[0026]

The two-component color developing sheet of the present invention is the base sheet 1
A microcapsule color developing agent layer 2 having a liquid color developing agent as a core material, a liquid permeable sheet 4, and a color developing agent layer 5 for developing the color developing agent are provided in this order on the surface of the color developing agent layer. Whether the base material sheet 1 provided with 2 and the liquid permeable sheet 4 provided with the developer layer 5 are adhered via an adhesive layer,
Alternatively, it is characterized in that it is used by adhering, and by applying appropriate pressure from above the developer layer 5 on the surface of the two-component coloring sheet or from both sides, the internal microcapsules are destroyed and The color developer that has flowed out permeates the liquid permeable sheet 4 on the upper side thereof, reaches the developer layer 5, and develops color. Also, the liquid permeable sheet 4
By appropriately setting the thickness, the time until the color-developing agent penetrates and reaches the developer layer can be appropriately set, and a predetermined time difference from the pressurization time to the color development can be imparted. .. Further, by forming the microcapsule color forming agent layer in a desired pattern such as letters, symbols and figures on the base material sheet, it is hidden by the liquid permeable sheet 4 in the non-pressurized state, but the letters are applied by the full pressure. It is possible to display pattern colors such as symbols, figures and the like.

[0027]

EFFECT OF THE INVENTION In the two-component color developing sheet of the present invention, the color development caused by the application of pressure such as writing pressure can be observed from the surface side of the two-component color developing sheet, and the color is developed at a short interval after the pressure is applied. It is also possible to pattern color by applying pressure to the entire surface by forming the microcapsule color-developer layer in a desired pattern such as letters, symbols, and figures. For example, lottery tickets, entrance tickets, and elapsed time can be measured. It has a remarkable effect that it can be used as an indicator or the like, and can also be used as a lower paper of non-carbo paper.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of a two-component color developing sheet according to the first aspect of the present invention.

FIG. 2 (a) is a side view illustrating an example of use of the two-component color developing sheet according to the first aspect of the present invention. (B) It is a side view explaining the example of use of the two-component type color development sheet by the 1st invention of the present invention.

FIG. 3 is a side view of another embodiment of the two-component coloring sheet according to the first aspect of the present invention.

FIG. 4 is a side view of an embodiment of a two-component color developing sheet according to the second aspect of the present invention.

FIG. 5 is a side view after a sheet A and a sheet B are attached to each other in an example of the two-component color developing sheet according to the second aspect of the present invention.

[Explanation of symbols]

1 ... Substrate sheet 2 ... Microcapsule color developer layer 3 ...
Adhesive layer 4 ... Liquid permeable sheet 5 ... Developer layer A ...
Sheet B ... Sheet 10 ... Pressurizing part 11 ... Capsule breaking part 12 ... Coloring agent 13 ... Coloring part

Claims (2)

[Claims] 1. A microcapsule color-developing layer 2 having a liquid color-developing agent as a core material, a liquid-permeable sheet 4, and a color-developing layer 5 for developing the color-developing agent in this order on the surface of a substrate sheet 1. A two-component coloring sheet characterized by being provided. 2. A sheet A in which a microcapsule coloring agent layer 2 having a liquid coloring agent as a core material is provided on the surface of a substrate sheet 1.
A sheet B having a color developer layer 5 for developing the color developer on the surface of the liquid permeable sheet 4, a color developer layer 2 side of the sheet A and the liquid permeable sheet 4 of the sheet B.
A two-component color-developing sheet, wherein the pressure-sensitive adhesive layer 3 is provided on either or both sides.