JPH112896A - Photosensitive pressure-sensitive recording medium - Google Patents

Abstract

(57) [Problem] To provide a photosensitive pressure-sensitive recording medium that can easily display a clear image even when attached to an adherend such as a stationery using a simple image forming apparatus. SOLUTION: The photosensitive pressure-sensitive recording medium 1 includes a first sheet-shaped support 1 through which light passes, a microcapsule 4 containing a component whose mechanical strength changes by being exposed to light, and a co-reactant 5. Pressure-sensitive layer 3 comprising: a white and opaque pressure-sensitive adhesive layer 7; and a release layer 12 on at least the pressure-sensitive adhesive layer side.
And a second sheet-like support member 14 having the same. After image exposure and pressure development, the second sheet-like support 14 was peeled off to expose the adhesive layer 7,
Affix to the adherend. At this time, since the adhesive layer 7 is opaque, the color of the base of the adherend is shielded, and a vivid image with white as the background color can be observed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a photosensitive and pressure-sensitive recording medium.

[0002]

2. Description of the Related Art Conventionally, photosensitive and pressure-sensitive recording media of this type have been disclosed in Japanese Patent Application Laid-Open Nos. 58-45090 and 58-88.
As described in JP 740 or the like, a self-coloring type photosensitive pressure-sensitive recording medium using microcapsules is known. The respective steps of exposure and pressure development are performed on the photosensitive pressure-sensitive recording medium, and an image is recorded on the photosensitive pressure-sensitive recording medium itself.

In recent years, as such a photosensitive and pressure-sensitive recording medium, a light-transmitting sheet-like support layer, a photosensitive microcapsule containing a component whose mechanical strength changes by being exposed to light, and a photosensitive microcapsule containing the component have been developed. There has been proposed a layer formed by laminating a photosensitive pressure-sensitive layer comprising a component contained in a hydrophobic microcapsule and a co-reactant which undergoes a color development reaction, and a white support.

[0004]

When it is desired to paste an image created using this photosensitive pressure-sensitive recording medium on an adherend such as a stationery, it is necessary to glue the image output to the back surface. .

[0005] In order to facilitate the sticking, it is conceivable that the photosensitive and pressure-sensitive recording medium has a structure in which a release layer is provided on the white support, and the release layer is laminated with an adhesive. This is because, if necessary, if the white support is peeled off to expose the pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer can be attached to a desired adherend.

However, the thickness of the ordinary light-sensitive and pressure-sensitive layer is small, and the light-transmitting property is high. Further, since the pressure-sensitive adhesive layer is usually transparent, even if an image output composed of such a material is pasted on a patterned adherend or a colored adherend, it can be used as a base (adhered substrate). Surface) was seen through, and there was a problem that the image was difficult to see.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a photosensitive pressure-sensitive recording medium having a high underlayer concealing property when attached to an adherend. .

[0008]

In order to achieve this object, a light-sensitive pressure-sensitive recording medium according to the first aspect of the present invention comprises a first sheet-shaped support through which light passes and a light-sensitive recording medium. A pressure-sensitive layer comprising a photosensitive microcapsule containing a component whose mechanical strength is changed by the reaction and a co-reactant of the component contained in the photosensitive microcapsule; an adhesive layer; and a release layer on at least one surface. And a second sheet-like support provided with the above, wherein the adhesive layer is opaque. Therefore, after the image is formed by exposure and pressure development, the base is concealed by the opaque adhesive layer even when the second sheet-shaped support is peeled off and attached to an adherend such as a colored stationery. Thus, the obtained image can be clearly seen. The pressure-sensitive adhesive layer serves as a background of the image developed with pressure, and therefore is preferably white for general use.

In a preferred embodiment of the present invention, the pressure-sensitive pressure-sensitive recording medium has a pressure-sensitive adhesive layer provided on both surfaces of a third sheet-like support. A large number of products obtained by laminating a second substrate having a release layer on both sides to this adhesive layer are marketed. Therefore, a photosensitive and pressure-sensitive recording medium having an inexpensive and high-quality pressure-sensitive adhesive layer can be obtained.

In a third aspect of the present invention, the third sheet-like support is opaque.
Therefore, selection of the adhesive becomes easy.

According to a fourth aspect of the present invention, in the photosensitive pressure-sensitive recording medium, at least one of the pressure-sensitive adhesive layers is formed by coating the third sheet-like support with an opaque pressure-sensitive adhesive layer. . This facilitates the selection of the support.

Further, in the photosensitive and pressure-sensitive recording medium according to claim 5, the third sheet-like support has an opaque coating layer on at least one of both surfaces thereof. Therefore,
Selection of the support and the adhesive becomes easy.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a sectional structure of a photosensitive and pressure-sensitive recording medium 1 according to the present embodiment. The photosensitive pressure-sensitive recording medium 1 includes a light-transmissive first sheet-like support 2, a photosensitive pressure-sensitive layer 3,
The second sheet-like support 14 having the release layer 12 formed on the base material 8 is laminated and integrated by the action of the adhesive layer 7.

The light-transmissive first sheet-like support 2 is made of PET (polyethylene terephthalate), P
EN (polyethylene naphthalate), PPS (polyphenylene sulfide), polypropylene, polyvinyl chloride, polyvinylidene chloride, polymethyl methacrylate,
A transparent resin film such as polystyrene is used, and PET is particularly preferably used.

The substrate 8 of the second sheet-like support 14 may be light-transmissive or opaque, but when it is opaque and white, The following can be used.

For example, it is possible to use a white resin film obtained by dispersing a white pigment such as titanium oxide or zinc oxide, or an extender such as talc or kaolin in a resin material in advance and stretching it. It is.

Further, a light-weight, white resin film such as PET or polypropylene having a large number of voids (voids) may be used.

Further, a transparent resin film having at least one surface coated with an opaque white ink may be used. It is also possible to use a paper which is widely distributed in the market as a base material.

On the other hand, the substrate 8 may be made of a light-transmitting material. In this case, various films of the same material as the support 2 are preferably used.

A release layer 12 is formed on the substrate 8 to form a second sheet-like support 14. The release layer 12 is formed by applying a silicone-based resin or a polyethylene, PVA, alkyd resin or the like on a base material and baking and drying the same. In particular, a silicone-based one is suitably used.

An adhesive layer 7 is further formed on the release layer 12. The adhesive layer 7 is formed by using a coating liquid in which a wax-based, acrylic-based, silicone-based, or rubber-based adhesive is dissolved in a solvent such as toluene or methyl ethyl ketone, or an emulsified coating liquid using a known coating apparatus. Then, the sheet-like support 14 is formed by coating and drying.

Here, in the adhesive layer 7, white pigments such as titanium oxide and zinc oxide, extender pigments such as talc and kaolin, and hollow fine resin spheres are dispersed alone or in combination. I have. For this reason, the adhesive layer 7 is white and opaque.

Next, the photosensitive pressure-sensitive layer 3 is composed of a microcapsule 4 and a co-reactant 5 dispersed in a binder 6. The microcapsules 4 are made of a triphenylmethane-based, spiropyran-based dye chromogen (for example, a colorless dye precursor), a photocurable resin of an acryloyl group-containing compound such as trimethylolpropane triacrylate, and benzophenone, benzoylalkyl. Known materials such as a photopolymerization initiator such as ether, which is included in a wall material such as gelatin, polyamide polyvinyl alcohol, and polyisocyanate resin, can be used.

The co-reactant 5 comprises the microcapsules 4
It is determined in consideration of the chromogen used for inclusions, but is generally an acidic substance, for example, acid clay,
Known developers such as inorganic oxides such as kaolin, zinc oxide and titanium oxide, phenol novolak resins and salicylic acid derivatives as organic acids can be used.

These are dispersed in a water-soluble resin such as polyvinyl alcohol and hydroxypropyl cellulose, and various resin emulsions such as an acrylic emulsion and a polyester emulsion together with a filler and a viscosity adjusting agent. To form the photosensitive pressure-sensitive layer 3.

Further, by the action of the adhesive layer 7, the photosensitive and pressure-sensitive recording medium 1 is formed by being bonded to the second sheet-like support 14.

The photosensitive pressure-sensitive recording medium 1 is subjected to image exposure from the side of the light-transmissive first sheet-like support 2, and the microcapsules are photosensitive-cured to form an exposure latent image as a cured pattern. For example, pressure development is performed by a pair of pressure rollers. Due to this pressure development, the microcapsules that are not cured by the exposure are broken under pressure, and the dye precursors, which are the inclusions, go out of the capsules to form a color development reaction with the developer outside the capsules. Is manifested (developed). That is, by performing exposure and pressure development, a developed image is formed with the white adhesive layer 7 as a background. The self-coloring is performed in this manner, and after forming an image, the second sheet-like support 14 on the back surface is peeled off to expose the adhesive layer 7 and to be adhered to any stationery, an album or the like. It is possible to affix to. At this time, since the adhesive layer is white and opaque, the color of the base is concealed, and the image formed on the photosensitive and pressure-sensitive recording medium 1 can be clearly observed.

Next, a photosensitive and pressure-sensitive recording medium 100 according to another embodiment of the present invention will be described with reference to FIG. The photosensitive and pressure-sensitive recording medium 100 has a light-transmissive first sheet-like support 2, a photosensitive and pressure-sensitive layer 3, and a second sheet-like material in which release layers 12 and 13 are formed on both surfaces of a substrate 11. Support 14
And a third sheet-like support (substrate) 9 provided with pressure-sensitive adhesive layers 8 and 10 on both sides thereof. The pressure-sensitive and light-sensitive layers 3 and the second sheet-like support 14 are integrated by the pressure-sensitive adhesive layers 8 and 10. In this embodiment, the base material 9 and the pressure-sensitive adhesive layers 8, 1 applied to both surfaces thereof are used.
0 constitutes an adhesive layer equivalent to the adhesive layer 7 of the first embodiment.

Here, the base material 9, the adhesive layer 8, and the adhesive layer 1
At least one of 0 is white and opaque. For these, various materials for constituting the photosensitive pressure-sensitive recording medium 1 are suitably used. For example, a PET film in which a white pigment such as titanium oxide is dispersed can be used for the substrate 9. Further, a material in which a white pigment such as titanium oxide is dispersed in the adhesive layers 8 and 10 may be used.

According to this configuration, it is possible to use a double-sided pressure-sensitive adhesive tape with release paper which is widely distributed in the market. By laminating this with a substrate coated with a photosensitive pressure-sensitive layer, a photosensitive pressure-sensitive recording medium of this configuration can be easily formed, and a high-performance adhesive can be used at low cost. it can.

Next, a photosensitive pressure-sensitive recording medium 110 according to another embodiment of the present invention will be described with reference to FIG. The photosensitive and pressure-sensitive recording medium 110 has a light-transmissive first sheet-like support 2, a photosensitive and pressure-sensitive layer 3, and a second sheet-like material in which release layers 12 and 13 are formed on both surfaces of a substrate 11. Support 14
And a third sheet-like support (substrate) 9 having a white coating layer 15 and a colorless pressure-sensitive adhesive layer 8 on the side facing the photosensitive pressure-sensitive layer and a pressure-sensitive adhesive layer 10 on the opposite side. Are laminated. In the present embodiment, the base material 9 and the white coating layer 15 and the pressure-sensitive adhesive layers 8 and 10 applied thereto are
And a pressure-sensitive adhesive layer equivalent to the pressure-sensitive adhesive layer 7 of the embodiment.

Here, the substrate 9, the adhesive layer 8, and the adhesive layer 1
As long as at least one of 0 is white and opaque. If these are white and opaque, the adhesive layer 7
Becomes opaque, and if they are all white and opaque, the opacity is increased, so that a clear image can be displayed even when pasted on a darker background.

The white coating layer 15 is prepared by coating a coating liquid in which a white pigment such as titanium oxide or zinc oxide is dispersed in a solution or emulsion of a known binder resin such as an acrylic resin, an epoxy resin, or a polyester resin. Is applied and dried on a resin film such as a PET film by the action of a coating machine.

The photosensitive and pressure-sensitive recording media 100 and 110
After the image is formed in the same manner as in the first embodiment, the pressure-sensitive adhesive layer 10 is exposed by peeling off the second sheet-like support (separator) 14 on the back of the photosensitive and pressure-sensitive recording medium. Then, it can be attached to various objects to be attached.

Next, an image forming apparatus 21 for forming an image using the photosensitive pressure-sensitive recording medium 1 will be described with reference to FIG. This image forming apparatus is merely an example of an apparatus that forms an image by image exposure and pressure development.

As shown in FIG. 3, a light-shielding container 22 containing a plurality of photosensitive and pressure-sensitive recording media 7 is set in the image forming apparatus 21 according to the present embodiment. A driver 23 is arranged on the left side of the light shielding container 22,
A liquid crystal display 26 is arranged below the driver 23. On the left side of the liquid crystal display 26,
A pair of pressure developing rolls 24 and 25 are arranged, and a pair of heating rolls 27 and 28 are further arranged on the left side.

In the above configuration, the photosensitive pressure-sensitive recording medium 1
Are pulled out one by one from the light-shielding container 22 by a pick-up roller, and the liquid crystal display 26 is arranged so that the first sheet-like support (light-transmitting film) 2 side faces upward.
To the exposure area below. Thereafter, the liquid crystal display 26 displays an image by the action of the driver 23, and further, the image displayed on the liquid crystal display 26 by the action of the light source (not shown) is projected and formed on the photosensitive pressure-sensitive recording medium 1. Then, in the microcapsules 4 in the portion of the photosensitive pressure-sensitive recording medium 1 which has received this light, the photocurable resin inside the capsules is cured, and the mechanical strength of the microcapsules 4 is increased. That is, the photosensitive pressure-sensitive recording medium 1 is image-exposed by the liquid crystal display 26, and a latent image is formed on the photosensitive pressure-sensitive recording medium 1.

Thereafter, the photosensitive and pressure-sensitive recording medium 1 is conveyed to the left in FIG. 4, and is developed under pressure by a pair of pressure developing rolls 24 and 25. Thereby, the photosensitive pressure-sensitive recording medium 1
The microcapsules having low mechanical strength are destroyed, and the chromogen (dye precursor) and the co-reactant (developing agent) enclosed therein cause a color-forming reaction, so that the light-sensitive and pressure-sensitive recording medium 1 is formed. Is visualized. Further, the photosensitive and pressure-sensitive recording medium 1 is heated by a pair of heating rolls 27 and 28. As a result, the dye component and the developer component are sufficiently reacted and fixed.

The present invention is not limited to the embodiment described in detail above, and various changes can be made without departing from the gist of the present invention.

For example, the adhesive layer may be not only white and opaque, but also any color and transparent. That is, anything may be used as long as it blocks the color of the base of the adherend. Further, the shape of the photosensitive pressure-sensitive recording medium may be not only a cut sheet shape but also a roll shape. In the case of a roll, only the image forming portion needs to be cut and separated before or after image exposure.

[0042]

As is clear from the above description, the light-sensitive pressure-sensitive recording medium according to the first aspect of the present invention comprises a light-transmitting first sheet-shaped support and a light-sensitive material. A photosensitive microcapsule containing a component whose mechanical strength changes and a photosensitive pressure-sensitive layer comprising a co-reactant of the component contained in the photosensitive microcapsule, an adhesive layer, and a release layer on at least one surface. And a second sheet-like support provided thereon, wherein the adhesive layer is opaque. Therefore, after the image is formed by exposure and pressure development, the base is hidden by the opaque adhesive layer even when the second sheet-like support is peeled off and attached to an adherend such as a colored stationery. Thus, the obtained image can be clearly seen.

Further, in the photosensitive and pressure-sensitive recording medium according to the second aspect, the pressure-sensitive adhesive layer has a pressure-sensitive adhesive layer on both surfaces of a third sheet-like support. A large number of products obtained by laminating a second substrate having a release layer on both sides to this adhesive layer are marketed. Therefore, in addition to the effect of the first aspect, a photosensitive and pressure-sensitive recording medium having an inexpensive and high-quality pressure-sensitive adhesive layer can be obtained.

Further, in the photosensitive and pressure-sensitive recording medium according to the third aspect, the third sheet-like support is opaque.
Therefore, in addition to the effect of the second aspect, the selection of the pressure-sensitive adhesive is facilitated, and the pressure-sensitive adhesive is easy to produce, and the cost is further reduced.

Further, in the photosensitive and pressure-sensitive recording medium according to claim 4, at least one of the pressure-sensitive adhesive layers is formed by applying an opaque pressure-sensitive adhesive layer to the third sheet-like support. . Therefore, in addition to the effects of the second and third aspects, the selection of the support is easy, and the support is easy to manufacture, and the cost is further reduced.

Further, in the photosensitive and pressure-sensitive recording medium according to the fifth aspect, the third sheet-like support has an opaque coating layer on at least one of both surfaces thereof. Therefore,
In addition to the effects of any of claims 2 to 4, the selection of the support and the adhesive is easy, and the production is easy and the cost is low.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a photosensitive pressure-sensitive recording medium according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a photosensitive pressure-sensitive recording medium according to another embodiment of the present invention.

FIG. 3 is a cross-sectional view illustrating a photosensitive pressure-sensitive recording medium according to another embodiment of the present invention.

FIG. 4 is a schematic configuration diagram of an image forming apparatus using a photosensitive pressure-sensitive recording medium.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 photosensitive pressure-sensitive recording medium 2 first sheet-like support 3 photosensitive pressure-sensitive layer 7 adhesive layer 8 base material 14 second sheet-like support 100 photosensitive pressure-sensitive recording medium 110 photosensitive pressure-sensitive recording medium

Claims (5)

[Claims] 1. A first sheet-like support through which light is transmitted,
A photosensitive microcapsule containing a component whose mechanical strength changes by being exposed to light; a photosensitive pressure-sensitive layer comprising a co-reactant of the component contained in the photosensitive microcapsule; and an adhesive layer; A pressure-sensitive recording medium comprising a laminate of a second sheet-like support having a release layer on the surface thereof, wherein the pressure-sensitive adhesive layer is opaque. 2. The photosensitive and pressure-sensitive recording medium according to claim 1, wherein the pressure-sensitive adhesive layer has a pressure-sensitive adhesive layer on both surfaces of a third sheet-like support. 3. The photosensitive pressure-sensitive recording medium according to claim 2, wherein said third sheet-shaped support is opaque. 4. The method according to claim 2, wherein at least one of the pressure-sensitive adhesive layers is formed by applying an opaque pressure-sensitive adhesive layer to the third sheet-like support. Photosensitive pressure-sensitive recording medium. 5. The photosensitive pressure-sensitive device according to claim 2, wherein the third sheet-like support has an opaque coating layer on at least one of both surfaces thereof. recoding media.