JPH11109863A - Image display and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make transferable images regardless of the material of the conventional base materials and to prevent the peeling and alteration by heat, by successively providing the surface of a base material with a hardener layer, an image receiving layer contg. microcapsuled adhesives and a protective layer. SOLUTION: This image display is formed by successively providing the surface of the base material 1 with the hardener layer 3, the image receiving layer 5 contg. the microcapsuled adhesives and the protective layer 7. The image 2 of different color schemes may be disposed in the same position as the position of the image receiving layer 5 of the base material 1. The process for producing this medium to be transferred is executed by first providing a base 8 of an intermediate film with the protective layer 7. The protective layer 7 is provided thereon with the image receiving layer 5 contg. the microcapsuled 6 adhesives. The sublimation transfer image 4 is transferred by a thermal head via a dyeing film onto the surface of the image receiving layer 5. On the other hand, the medium to be transferred is provided thereon with the image 2 by printing, etc., and is provided with the hardener layer 3 thereon. The intermediate film is placed on the base material 1 formed in such a manner and is subjected to heat and pressures, to obtain the image display.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display formed by an intermediate film and a transfer medium such as a passport substrate before an image is formed on a passport by a passport printer. The present invention relates to an image display which peels off an image receiving layer provided with image information and prevents forgery and falsification, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, a method has been known in which a transfer ribbon coated with a sublimable dye uniformly over the entire surface is selectively heated locally by a thermal head according to image data to transfer and form a desired image on an object to be transferred. I was But,
Most of the materials that can be dyed with this sublimable dye are polyester, acrylic resin, polyvinyl chloride, and the like, and it is difficult to form synthetic resin, paper, metal, glass, etc. other than the above by this method. .

Therefore, as described in JP-A-63-81093, an image is first formed on an intermediate film using a transfer ribbon of a sublimable dye and a thermal head. There has been proposed a two-stage transfer method in which the image is transferred onto a transfer member, whereby an image can be formed regardless of the material of the transfer target.

However, as a method of bonding the intermediate film and the object to be transferred, a layer of a thermoplastic adhesive is provided on the intermediate film in advance, and transfer and bonding are performed by applying heat and pressure using a heat roller or the like. Using this method, when bonding, the heat can be easily applied to the transferred medium by reapplying heat to the transferred area, but the adhesive is softened by applying heat to the transferred medium, Since the intermediate film is melted and peeled off, there is a problem that forgery and falsification are facilitated.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve this problem, and an object of the present invention is to transfer an image irrespective of the material of a substrate as in the prior art, and to use heat. An object of the present invention is to provide an image display in which peeling and falsification are prevented.

[0006]

In order to solve this problem, the present invention is characterized in that at least a curing agent layer, an image receiving layer containing a microencapsulated adhesive, and a protective layer are sequentially provided on a substrate. An image display is provided. Further, the present invention provides an image display, wherein images of different colors are provided at the same position on the base material and the image receiving layer.

As a method for producing the same, a curing agent layer is provided on a substrate, a protective layer is provided on a support of the intermediate film, and an image receiving layer containing a microencapsulated adhesive is provided. The present invention provides a method for producing an image display, characterized in that an image receiving layer of an intermediate film is placed on the substrate, and the intermediate film is adhered by applying heat and pressure.

[0008]

Embodiments of the present invention will be described below in detail. The substrate in the present invention is not particularly limited, polyester, acrylic resin,
In addition to films and sheets made of a material such as polyvinyl chloride, other synthetic resins, paper, metal, glass and the like can be used.

The curing agent used in the curing agent layer in the present invention includes a peroxide catalyst, which redox-polymerizes with an acrylate or methacrylate of a microencapsulated adhesive described later.

In the present invention, as the image receiving layer containing the adhesive encapsulated in microcapsules, the shell of the microcapsules is made of acrylic resin, methacrylic resin, polystyrene, polyester resin, polyurethane resin, polyurea resin, polyamide resin, epoxy resin. Resins, natural resins, and other commonly used resins can be used, and these can be used alone or in combination of two or more.

As an adhesive serving as a core material used for the microcapsules, acrylates, methacrylates, and the like can be used. The content of the microcapsules in the image receiving layer is preferably about 70 to 85%.

A thermoplastic resin is used for the image-receiving layer containing the microencapsulated adhesive, for example, polyester such as linear saturated polyester, or vinyl chloride such as polyvinyl chloride or vinyl chloride-vinyl acetate copolymer resin. Resin, polyacrylic acid, 2-methoxyethyl polyacrylate, methyl polyacrylate, polyacrylic acid-2
-Naphthyl, polyisobornyl polyacrylate, polymethacrylomethyl, polyacrylonitrile, polymethylchloroacrylate, polymethyl methacrylate, polyethyl methacrylate, poly-tert-butyl methacrylate, polybutyl methacrylate, isobutyl methacrylate, polyphenyl methacrylate, methacrylic Acrylic resins such as copolymer resins of methyl acrylate and alkyl methacrylate (where the alkyl group has 2 to 6 carbon atoms), polystyrene, polydivinylbenzene,
Polyvinyl benzene, styrene-butadiene copolymer resin, vinyl resin such as styrene and alkyl methacrylate (where the alkyl group has 1 to 6 carbon atoms) and the like can be used.

The protective layer in the present invention must be easily peeled off from the intermediate film substrate during thermal transfer. Also,
It is necessary to perform the function of the protective film after the transfer. The function of the protective film is to prevent external chemical and mechanical damage of the image due to the dye. In order to satisfy both functions, a mixture of a friction-resistant agent and a thermoplastic resin may be used.

The thermoplastic resin prevents permeation of plasticizers and chemicals and reduces scratches due to scratching.
As such a thermoplastic resin, polymethyl methacrylate or an epoxy resin can be used. Methyl methacrylate and epoxy resin have excellent plasticity among existing thermoplastic resins and are easy to peel off the intermediate film from the support. By using these resins for the protective layer, it is possible to prevent the transfer of the plasticizer contained in a soft vinyl chloride sheet or a plastic eraser when the transferred image is brought into contact with the image. In addition, penetration of chemicals such as acids, alkalis, alcohols, and kerosene can be prevented, and the effect on images can be prevented.

The anti-friction agent is added for improving the friction resistance and the scratch resistance. For example, Teflon powder, polyethylene powder, animal wax,
Natural waxes such as vegetable waxes, mineral waxes, petroleum waxes, synthetic hydrocarbon waxes, aliphatic alcohols and acid waxes, aliphatic esters and glycerite waxes, hydrogen waxes, synthetic ketone waxes,
Examples include amine and amide waxes, chlorinated hydrocarbon waxes, synthetic animal wax waxes, synthetic waxes such as alpha-olefin waxes, and metal salts of higher fatty acids such as zinc stearate.

The thermoplastic resin and the anti-friction agent of the protective layer may be 85 to 95 parts by weight of the thermoplastic resin and 5 to 15 parts by weight of the anti-friction agent based on 100 parts by weight in total. Further, a peeling improving agent can be mixed in order to improve cutting during transfer. For example, a linear saturated polyester resin. However, 0 to 100 parts by weight of the total amount of the thermoplastic resin and the anti-friction agent
About 10 parts by weight is preferable.

The support for the intermediate film in the present invention is preferably one having heat resistance so as not to be softened and deformed by the heat and pressure during transfer. Such a support is known in the art. For example, a support having a thickness of 3 to 50 μm is preferably used. An axially stretched polyethylene terephthalate film or the like can be used.

Hereinafter, the method for manufacturing a medium to be transferred according to the present invention will be described in detail. First, a protective layer is provided on the support of the intermediate film. As a method of providing the protective layer, first, the release layer composition is formed into a coating with an appropriate solvent, and the coating may be formed by applying and drying the coating by a coating method such as gravure coating, roll coating or bar coating. The coating amount is preferably from 1 to 3 g / m ² .

An image receiving layer containing a microencapsulated adhesive is provided on the protective layer. As a method for providing the image receiving layer, first, the image receiving layer composition is formed into a coating with a suitable solvent, and the coating may be formed by applying and drying the coating by a coating method such as gravure coating, roll coating or bar coating. The coating amount is preferably from 1 to 3 g / m ² . The sublimation transfer image is transferred to the image receiving layer surface with a thermal head via a dyed film.

On the other hand, an image formed by printing or the like is provided on the medium to be transferred, and a curing agent layer is provided thereon. As a method of providing a curing agent layer, the composition is formed into a coating with an appropriate solvent, and the coating is formed by applying and drying the coating by a coating method such as gravure coating, roll coating coating, or bar coating, or a screen, offset, or the like. May be used. The coating amount is preferably from 1 to ²⁰ g / m ² .

The intermediate film is placed on the substrate thus provided, and is heated and pressed. Temperature is 100-250 ° C and 1
It may be about 10 seconds to about 10 seconds, and it is preferable to use a roll transfer method using a hot roll.

[0022]

According to the image display obtained as described above, first, heat is applied to the intermediate film, whereby the microcapsules in the image receiving layer are transferred to the bonding surface, and subsequently, pressure is applied. The microcapsules are destroyed, and adhere by reacting the microcapsulated adhesive with the base material provided with the curing agent layer in advance. With such bonding,
In addition to being able to form an image as in the past, unlike a thermoplastic resin that was a conventional image-receiving layer and adhesive layer, it is not affected by the application of heat, and peeling is prevented.

Further, by providing images of different colors at the same position on the base material and the image receiving layer, colors different from those of a single unit can be seen, and a forgery prevention effect can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a cross-sectional structure of an embodiment of an image display according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Substrate 2 ... Image 3 ... Curing agent layer 4 ... Sublimation transfer image 5 ... Image receiving layer 6 ... Microcapsule 7 ... Protective layer 8 ... Intermediate film support

Claims (3)

[Claims] 1. An image display comprising: a substrate, at least a curing agent layer, an image-receiving layer containing a microencapsulated adhesive, and a protective layer. 2. The image display according to claim 1, wherein images of different color arrangements are provided at the same position on the substrate and the image receiving layer. 3. A hardener layer is provided on a substrate, a protective layer is provided on a support of the intermediate film, and an image receiving layer containing a microencapsulated adhesive is provided on the support of the intermediate film. A method for producing an image display, comprising attaching an image receiving layer and applying an intermediate film by applying heat and pressure.