JPH0789226A - Transfer sheet - Google Patents

Abstract

PURPOSE:To eliminate the thermal fusion of a dye film and an image receiving adhesive layer by successively laminating a release layer, a hologram forming layer, a transparent membrane layer and the image receiving adhesive layer made of a thermoplastic resin whose glass transition point is specific temp. or higher and wax. whose m.p. is within a specific temp. range. CONSTITUTION:A transfer sheet 1 consists of a heat-resistant base film 11, a release layer 12, a hologram forming layer 13, a transparent membrane layer 14, and an image receiving adhesive layer 15. The transparent membrane layer 14 is formed using a material of which the refractive index and transmissivity in a visible region are higher than those of the resin of the hologram forming layer 13. The thermoplastic resin used in the image receiving adhesive layer 15 pref. has a glass transition point of 50-110 deg.C. As the thermoplastic resin, polyester or polyvinyl chloride is used. In order to obtain a sharp image pattern, wax with an m.p. of 50-150 deg.C is added to the image receiving adhesive layer 15 to impart a blocking preventing property to the layer 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer sheet which is provided with an image pattern formed by sublimation transfer means based on image data and a hologram pattern and is used for manufacturing an image display body applied to, for example, an ID card. Involve

[0002]

2. Description of the Related Art An image pattern is formed on an image receiving layer of a transfer sheet based on image data by sublimation transfer means, and at least the image receiving layer of the transfer sheet is transferred onto a surface of an image display substrate (object) by a thermal transfer method. There is known a method of forming an image by doing so (for example, JP-A-63-8109).
(See Japanese Patent Publication No. 3). Hereinafter, the method will be described in detail. The transfer sheet used in this method has a basic structure in which an image receiving layer made of a thermoplastic resin which can be dyed with at least a sublimable (heat transferable) dye is provided on one surface of an arbitrary sheet-shaped substrate. It is a thing.

The image receiving layer of the transfer sheet as described above is brought into contact with the dye layer of the dye film in which the colorant is a sublimable dye, and the thermal head is pressed from the dye film side to thermally transfer an electric signal based on the image data. By applying and heating to the head, the dye layer is partially transferred to the image receiving layer to form an image pattern. When the image data is multicolor, the same steps are repeated using dye films having different color tones to form a multicolor image pattern on the transfer sheet.

The transfer sheet on which the image pattern is formed by the above steps is brought into contact with the surface of the image display substrate, and a heating medium such as a heat roll or a heating plate is pressed from the transfer sheet side.
Heating is performed to thermally transfer at least the image receiving layer to the image display substrate. At this time, since the image receiving layer is a thermoplastic resin, it also functions as an adhesive. The above method has an effect that the image pattern is clear because it is formed of a sublimable dye, and that an image can be formed without particularly selecting an image display substrate.

However, when carrying out the above method,
The selection of the material of the image receiving layer of the transferred sheet becomes a problem. That is, in the step of forming the image pattern, since the dye film is contacted and heated, if the thermoplastic resin of the image receiving layer has a low heat melting temperature, the image receiving layer and the dye film may be heat fused. There is. In order to prevent heat fusion, it is conceivable to use a thermoplastic resin having a high heat melting temperature for the image receiving layer, but in the step of transferring the image receiving layer to the image display substrate, the temperature of the heating medium must be raised. However, the image pattern made of dye is deteriorated (discolored) and the image display body is damaged by heat. Further, in order to reduce the adhesiveness to the dye film, it is possible to mix an additive such as silicon in the image receiving layer, but in that case, there is a problem that the adhesiveness to the image display substrate is deteriorated. Occur.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a dye when an image pattern is formed on an image receiving / adhesive layer using a sublimable dye. There is no heat fusion between the film and the image-receiving / adhesive layer, and high thermal responsiveness for image pattern formation, and deterioration of the image pattern when the transfer sheet is thermally transferred to the image display substrate or image display body. The present invention aims to provide a transfer sheet that satisfies the above requirements, with less damage, and sufficient adhesion to an image display substrate.

[0007]

Means provided by the present invention in order to solve the above-mentioned problems are as follows: a heat-resistant base film, a peeling layer which is easily peeled from the base film, a hologram forming layer, A transparent thin film layer having a refractive index larger than that of the hologram forming layer, a thermoplastic resin having a glass transition point of 50 ° C. or higher, and a melting point of 50 to 15
It is a transfer sheet in which image-receiving / adhesive layers having 0 ° C. wax are sequentially laminated.

Preferably, the image receiving / adhesive layer contains 0.5 to 20 parts by weight of the wax with respect to 100 parts by weight of the thermoplastic resin. Is.

More preferably, the image receiving / adhesive layer is
Thermoplastic resin with a glass transition point of 50 ° C or higher, melting point of 50
The above-mentioned sheet to be transferred is characterized by comprising a wax at a temperature of 1 to 150 ° C. and a filler.

A more detailed description of the invention follows. As shown in FIG. 1, the transfer sheet (1) according to the present invention includes a base film (11), a peeling layer (12) and a hologram forming layer (13), a transparent thin film layer (14), an image receiving / adhesive layer ( 15).

The base film (11) is required to have heat resistance so that it is not softened and deformed by the heat pressure during transfer. Such a base film (11) is known and has a thickness of, for example, 3 to 50 μm.
A biaxially stretched polyethylene terephthalate film of m can be used. Further, the peeling layer (12) needs to be easily peeled from the base film (11) during thermal transfer. Further, it is necessary to fulfill the function of the protective film after being transferred.
The function of the protective film is to prevent external chemical and mechanical damage of the image by the dye. In order to satisfy both functions, a mixture of anti-friction agent and thermoplastic resin may be used.

The thermoplastic resin prevents permeation of plasticizers and chemicals and reduces scratches caused by scratching. As the thermoplastic resin, polymethylmethacrylate or epoxy resin can be used. Among the existing thermoplastic resins, polymethylmethacrylate and epoxy resins have excellent plasticizer resistance, and at the same time the base film (1
It is easy to peel from 1). The release layer (1
When it is used in 2), when the soft vinyl chloride sheet or the plastic eraser is brought into contact with the transferred image, migration of the plasticizer contained therein can be prevented. Also,
It is possible to prevent penetration of various solvents and chemicals such as acids, alkalis, alcohols, and kerosene, and prevent adverse effects on images.

Further, the anti-friction agent is added to improve resistance to abrasion and scratches. For example, Teflon powder, polyethylene powder, animal wax, plant wax, mineral wax, natural wax such as petroleum wax, or synthetic hydrocarbon wax, aliphatic alcohol and acid wax, fatty acid ester and glycerite wax, Hydrogenated waxes, synthetic ketone waxes, 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. I can give you.

The release layer (12) may contain 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 of the total amount of the thermoplastic resin and the anti-friction agent. The coating amount may be 1 to 3 g / m ² . Release layer (12)
In addition to the above components, a peeling improving agent may be mixed in order to improve the cuttability at the time of transfer. Specific examples of the material include linear saturated polyester resin. However, when the peeling improving agent is mixed, it should be limited to 3 parts by weight or less based on 100 parts by weight of the total amount of the thermoplastic resin and the anti-friction agent. It should be noted that it is desirable not to add any other additive (for example, an ultraviolet absorber) to the release layer (12). This is because addition causes a decrease in chemical resistance and facilitates penetration of a plasticizer, which causes deterioration in mechanical strength of the release layer. Then, the method for applying the release layer is to first form the release layer composition into a paint by using an appropriate solvent, and apply the coating by a coating method such as gravure coating, roll coating or bar coating to form a coating. You can do it.

The hologram forming layer (13) is a surface relief type hologram stamper for forming the hologram pattern (3a) by heating and pressing. As a resin used for the hologram forming layer (13), a very good result can be obtained by using a two-component reaction urethane resin. In other words, the two-component reactive urethane resin has good embossing moldability, is less likely to cause uneven press, produces a bright reproduced image, and also has good adhesion to the base material during embossing, and also has good adhesion to the metal reflective layer. This is because it is good and the releasability at the time of transferring to the transfer target is very good.

That is, the two-liquid reaction type urethane resin as the hologram forming layer (13) described in the present invention is a polyether polyol, a polyester polyol, an acrylic polyol, etc. in view of various physical properties such as solvent resistance, heat resistance and processability. A polyol-curable urethane resin composed of the polyol component (1) and a prepolymer having an isocyanate group is suitable. However, among these, the polyol component is a glass transition point in the range of 70 to 105 ° C., and by using an acrylic polyol resin having an OH group in the range of 50 to 150, the coating suitability is also good, and the transfer target It is possible to obtain a transfer sheet having extremely excellent performance such as embossing moldability required for the sheet and releasability from the base film.

As the isocyanate component, toluene diisocyanate (TDI), xylene diisocyanate (XDI), hexamethylene isocyanate (HMD) are used.
I) or the like can be used. In addition, as a modifier for improving coating suitability and transferability, cellulose resins such as nitrocellulose, acetyl cellulose, cellulose acetate butyrate, cellulose acetate propionate, ethyl cellulose, and methyl cellulose can be used as the maximum against the two-component reactive urethane resin. By adding together 30% by weight,
Further good results are obtained. As a method for applying such a hologram forming layer (13), a resin which has been made into a paint can be applied by a method such as roll coating or blade coating and dried to form a film thickness of 0.5 to 3 g / m ^2. Good.

The hologram forming layer (1
3) has a good adhesion to a base film coated with a release varnish layer, has excellent formability by heating and pressing during embossing, and has nickel, gold, chrome, etc. plated on the surface. It does not adhere to the applied stamper, exhibits good adhesion with the metal reflective layer, and has good film breakage. Furthermore, reliable transfer is possible without peeling defects of the metal reflective layer during hot stamping, transfer unevenness, burrs, and blistering, and due to the excellent heat resistance of the urethane resin, it is generated by the vapor deposition process and heat during hot stamping. It is possible to prevent the deterioration of the external appearance such as cracking, whitening, and destruction of the hologram pattern due to the shrinkage.

The transparent thin film layer (14) is made of a material having a higher refractive index than the resin of the hologram forming layer (13) and a high transmittance in the visible light region. When the transparent thin film layer (14) having a high refractive index is provided, it can be seen as a mere transparent body outside the reproducible angle range of the hologram due to the angle dependence of the replay characteristic of the hologram, and the reproducible angle range of the hologram is Then, the refractive index of light becomes maximum, and the effect as a reflection hologram appears. Examples of the material of such a transparent thin film layer (14) include the inorganic substances listed in Table 1.

[0020]

[Table 1]

The transparent thin film layer (14) can be formed by a method such as a vacuum vapor deposition method, a sputtering method or an ion plating method. A suitable film thickness is in the range of 100 to 10000Å.

The image receiving / adhesive layer (15) forms an image pattern and adheres to the surface of the image forming substrate made of a plastic material or the like. The thermoplastic resin used for the image receiving / adhesive layer (15) preferably has a glass transition point (Tg) of 50 to 110 ° C. This is because when a resin having a glass transition temperature of less than 50 ° C. is used, the resin causes migration of the dye after the transfer, causing image bleeding. On the other hand, when a resin having a glass transition point of more than 110 ° C. is used, a high temperature is required at the time of transfer, so that not only the thermal head is loaded but also a plastic material for cards such as polyvinyl chloride is used. This is because it is easily deformed by heat.

Examples of the thermoplastic resin used for the image receiving / adhesive layer (15) include the following. That is, polyester such as linear saturated polyester, polyvinyl chloride resin such as polyvinyl chloride or vinyl chloride-vinyl acetate copolymer resin, polyacrylic acid, polyacrylic acid-2
-Methoxyethyl, polymethyl acrylate, poly (2-naphthyl acrylate), isobornyl polyacrylate, polymethacrylomethyl, polyacrylonitrile, polymethylchloroacrylate, polymethylmethacrylate, polyethylmethacrylate, polymethacrylic acid-tert -Acrylic resins such as butyl, polybutyl isobutyl methacrylate, polyphenyl methacrylate, copolymer resins of methyl methacrylate and alkyl methacrylate (where the alkyl group has 2 to 6 carbon atoms), polystyrene, polydivinylbenzene, polyvinylbenzene , Styrene-butadiene copolymer resin, and vinyl resins such as styrene and alkyl methacrylate (wherein the alkyl group has 1 to 6 carbon atoms).

By the way, when a sublimation transfer image is transferred to the surface of the image receiving / adhesive layer (15) through a dye film with a thermal head, since the main component of the image receiving / adhesive layer (15) is a thermoplastic resin, it remains as it is. The image-receiving / adhesive layer (15) is heat-fused to the dye layer of the dye film by the heat of the thermal head, and a clear image pattern cannot be obtained. In order to prevent such problems and obtain a clearer image pattern, a wax having a melting point of 50 to 150 ° C. is added to the image receiving / adhesive layer (15) in order to impart antiblocking property. As such wax, carnauba wax,
Examples thereof include plant waxes such as candelilla wax and rice wax, petroleum waxes such as paraffin wax and microwax, polyethylene wax, and synthetic waxes such as 12-hydroxystearic acid and its derivatives.

The melting point of this wax is 50 to 1
50 ° C is desirable. This is because when the melting point of the wax is 50 ° C. or lower, blocking easily occurs during storage of the transferred sheet, and when it is 150 ° C. or higher,
This is because the adhesiveness when heat-transferred to the image display substrate is deteriorated.

The amount of wax added is 0.10 parts by weight based on 100 parts by weight of the thermoplastic resin in the image-receiving / adhesive layer (15).
5 to 20 parts by weight is desirable. This is because if the amount of wax added is less than 0.5 parts by weight, the effect of preventing heat fusion with the dye film cannot be sufficiently exerted, and
This is because when 0 parts by weight or more is added, there is a problem that the image receiving ability of the dye is lowered and the adhesiveness to the image display substrate is lowered.

In addition to the thermoplastic resin having a glass transition temperature of 50 ° C. or higher and the wax having a melting point of 50 to 200 ° C., it is preferable to add a filler in the image receiving / adhesive layer (15). According to this, it becomes possible to more effectively prevent heat fusion with the dye film. Specific examples of this filler are as follows. First, examples of the organic filler include polytetrafluoroethylene fine particles, starch, silicone resin fine particles, polyacrylonitrile-based fine particles, and cured resin fine particles made of benzoguanamine resin and melamine resin as raw materials. Further, as the inorganic filler, calcium carbonate, talc,
Examples thereof include kaolin, zinc oxide, titanium oxide, silicon oxide, aluminum hydroxide, magnesium oxide and the like. One of these fillers is used for 100 parts by weight of the thermoplastic resin.
It is preferable to add 30 to 30 parts by weight.

Then, an ultraviolet absorber may be appropriately added to the image-receiving / adhesive layer (15) depending on the content required when using the image display member according to the present invention. The background of this technology is related to the following matters. That is, the ultraviolet absorber prevents discoloration of the dye due to light. That is, it absorbs ultraviolet rays having a wavelength of 250 to 400 nm and re-radiates the energy as heat energy which is harmless to the dye, and the ultraviolet absorber itself does not deteriorate. For this reason, a UV absorber having a maximum absorption wavelength of 250 to 400 nm is used. Further, the ultraviolet absorber is a mixture 100 composed of the thermoplastic resin and a filler.
It may be 5 to 40 parts by weight with respect to parts by weight.

The specific examples of the ultraviolet absorber are as follows. That is, phenyl salicylate, pt
Salicylic acid-based UV absorbers such as ert-butylphenyl salicylate and p-octylphenyl salicylate,
2,4-dihydroxybenzophenone, 2-hydroxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 2-hydroxy-4-dodecyloxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy Benzophenone-based UV absorbers such as -4,4'-dimethoxybenzophenone and 2-hydroxy-4-methoxy-5-sulfobenzophenone, 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, 2- (2 '-Hydroxy-5'-tert-butylphenyl) benzotriazole, 2- (2'-hydroxy-3'-tert-butyl-5'-methylphenyl) benzotriazole, 2-
(2′-hydroxy-3 ′, 5′-ditert-butylphenyl) -5-chlorobenzotriazole, 2-
Benzotriazole-based UV absorbers such as (2'-hydroxy-3 ', 5'-ditert-amylphenyl) benzotriazole, 2-ethylhexyl-2-cyano-
3,3'-diphenyl acrylate, or ethyl-
Examples include cyanoacrylate-based ultraviolet absorbers such as 2-cyano-3,3-diphenylacrylate.

The coating amount of the image receiving / adhesive layer (15) is preferably 1 to 10 g / m ² . As a method for applying the image-receiving / adhesive layer (15), first, the image-receiving / adhesive layer composition is made into a paint by an appropriate solvent, and the coating is applied by gravure coating, roll coating or bar coating. It may be formed by coating and drying. In addition, for the purpose of improving various resistance such as heat resistance and chemical resistance of the transferred sheet,
The primer layer (16) may be provided between the transparent thin film layer (14) and the image receiving / adhesive layer (15). Examples of such resins include thermoplastic resins such as polyurethane ionomer resins, polyester urethane resins, and epoxy resins, polyol components such as polyether polyols, polyester polyols, and acrylic polyols, and prepolymers having an isocyanate group, and urethane-based thermal resins. Curable resin,
Examples of the resin include a prepolymer of a glycidyl group and an amino group.

The coating amount of the primer layer (16) is
0.3 to 3 μm is suitable. Primer layer (16)
As a method of applying, the primer layer composition is first made into a paint, and the paint may be applied and dried by an application method such as gravure application, roll coating application, or bar coat application. Transferred sheet (1) thus obtained
Can be transferred by forming an image pattern with a sublimable dye, superimposing it on a plastic material or the like and then heat-pressing, and then peeling and removing only the base film (11). Transfer can be performed by heating to a temperature equal to or higher than the softening point of the thermoplastic resin contained in the image receiving / adhesive layer (15). It is usually 100 to 250 ° C. Time is 1 to 1
About 0 seconds is enough.

3 and 4 show an example in which the transfer sheet shown in FIG. 1 is transferred to an identification card made of a plastic material to manufacture an image forming body.

In FIG. 4, the transfer target sheet is wound around a roll on the upper left side of the drawing, and is conveyed to the sublimation transfer section (20) and the transfer section (30) via a plurality of conveyance rollers (24). In the figure, the image receiving / adhesive layer of the transfer sheet is formed on the upper side in the upper part. Sublimation transfer part (20)
Includes a drum (21) with which the transfer sheet slides, a dye film (23) in which a coloring agent is a dye, and a dye film (2
It has a thermal head (22) that comes into pressure contact from the 3) side.
In forming an image pattern, an electric signal based on image data is applied to a thermal head and heated to partially transfer the dye in the dye layer to the image receiving / adhesive layer to form an image pattern (2a). When the image data is multicolor, a multicolor image pattern may be formed by using a dye film having dye layers of different colors on one film, or a dye film (23) of different colors and a thermal film may be formed. Multiple sets of heads (22) may be provided along the drum (21) to form a multicolor image pattern. The transfer part (30) is a transfer roll (3) for heating the transfer target sheet (1) on the image forming substrate (32) from the back surface (image receiving surface / adhesive layer forming surface).
1). Below the release layer of the transferred sheet (1) heated by the transfer roll (31), the image forming substrate (3) is used.
Transfer to 2). It will be apparent that the image forming base material (32) is not limited to the card base material made of plastic, and can be applied to a paper booklet such as a passport.

[0034]

When the heat melting temperature of the thermoplastic resin is low, it is easy to heat melt (soften) even if the energy is low, so that it can be said that the heat response at the time of heat transfer is high. However, on the other hand, however, it can be said that at the same time, a problem that the transfer is unnecessarily transferred to the dye film side easily occurs. Now, according to the transfer sheet according to the present invention, in the image receiving / adhesive layer,
A thermoplastic resin having a relatively low heat melting temperature is used, but in addition to this, a wax, or a wax and a filler are contained. Since the wax and further the filler are mixed, when the dye is transferred by heat by contacting the transfer sheet and the dye film at the time of image formation, the thermal melting temperature of the thermoplastic resin in the image receiving / adhesive layer is Even if it is low, there is no fear that the image receiving / adhesive layer will be transferred to the dye film side, and the thermal response will be high.

Further, since it is not necessary to use an additive such as silicon, the adhesiveness to the image forming body becomes good. Then, the thermoplastic resin in the image receiving / adhesive layer has a glass transition point of 50.
Since it is at least ℃, image change due to heat does not occur. Furthermore, when the image receiving / adhesive layer contains an ultraviolet absorber, discoloration due to light such as ultraviolet rays can be prevented. Further, if a primer layer is provided between the transparent thin film layer and the image receiving / adhesive layer, the adhesion between the transparent thin film layer and the image receiving / adhesive layer is improved,
Further, the resistance can be improved.

[0036]

【Example】

 <Example 1> {Production of transfer sheet} Composition of release layer coating material Polymethylmethacrylate (Tg: 105 ° C) 10 parts by weight (BR-80 manufactured by Mitsubishi Rayon Co., Ltd.) Teflon powder 1〃 toluene / 2-butanone (1/1) 40 〃 Composition of hologram forming layer paint Acrylic polyol resin 25 parts by weight (TG: 75 ° C, OH value: 100) Nitrocellulose resin 5 〃 (Nitrogen content: 12%, average degree of polymerization: 45, viscosity : 1/2) Xylene diisocyanate 5 〃 Toluene / 2-butanone (25/20) 45 〃 Isobutyl acetate 20 〃 Composition of image-receiving / adhesive layer paint Vinyl chloride-vinyl acetate copolymer (Tg: 65 ° C) 10 parts by weight (Sekisui Chemical Co., Ltd. S-REC A) Carnauba wax 0.5 〃 (melting point 82 ° C) 2- (2'-hydroxy-5'-meth) Phenyl) - benzotriazole 2.5 〃 toluene / 2-butanone (2/1) 40 〃

On a 12 μm thick polyethylene terephthalate (PET) film, the release layer coating material was applied by a gravure coater to a dry weight of 2.0 g / m ² and dried to form a release layer (12). Formed. The hologram forming layer coating material was applied onto the layer with a gravure coater so as to have a dry weight of 1.2 g / m ² and dried to form a hologram forming layer (13), which was then aged at 60 ° C. for 72 hours. Then, the hologram forming layer and the hologram pattern forming surface of the stamper were overlapped with a pressing machine, and embossing was performed under the conditions of 160 ° C. and 40 kg / cm ² heating and pressurization to form a hologram pattern on the hologram forming surface. Next, ZnS was vapor-deposited on the hologram formation surface to a thickness of about 500Å to form a transparent thin film layer (14).
Furthermore, the dry weight of the above image-receiving / adhesive layer coating material is 4.0 g / m.
A transfer sheet was manufactured by applying a gravure coater so as to have a thickness of ² and then drying to form an image receiving / adhesive layer (15).

{Production of Dye Film} Dyes of three colors (yellow, magenta and cyan) are dispersed in polyvinyl butyral and a thickness of 6 μm is obtained using a gravure coater.
On the polyester film of m, coating and drying were performed so that each color was alternately arranged, and a dye film having dye layers of three colors was formed. The transfer sheet, the dye film, and a card (image forming body) made of polyvinyl chloride were arranged in the apparatus shown in FIG.

The operation of the apparatus will be described below. First, a yellow image pattern is formed on the transfer sheet. The yellow dye layer of the dye film in which the dyes of three colors are alternately arranged is brought into contact with the image receiving / adhesive layer of the transfer sheet, and the image data of the image data previously input to the image processing unit (not shown) of the apparatus is recorded. From the inside, yellow image data was extracted, and an electric signal corresponding thereto was applied to the thermal head and heated. The drum was rotated clockwise to move the relative position between the thermal head and the transfer sheet. The same procedure was performed for magenta and cyan to form a color image pattern on the transfer sheet. Next, the portion on which the image pattern is formed is conveyed to the transfer portion, aligned with a card (image display base material) made of polyvinyl chloride, and a heating roll (heating temperature 150 ° C.) is pressed against the transfer sheet, The layers below the release layer of the transferred sheet were transferred to a card. The card (image display body) manufactured in this manner had a clear image pattern and a hologram pattern thereon.

Example 2 {Manufacture of Transferred Sheet} Composition of Release Layer Coating Composition Polymethylmethacrylate (Tg: 105 ° C.) 10 parts by weight (Mitsubishi Rayon Co., Ltd. BR-80) Teflon powder 1 〃 toluene / 2-Butanone (1/1) 40〃 Composition of hologram forming layer coating acrylic polyol resin 25 parts by weight (TG: 75 ° C, OH value: 130) Nitrocellulose resin 5〃 (nitrogen content: 12%, average degree of polymerization: 45, viscosity: 1/2) xylene diisocyanate 5 〃 toluene / 2-butanone (25/20) 45 〃 isobutylene acetate 20 〃 image / adhesive layer paint composition vinyl chloride-vinyl acetate copolymer (Tg; 65 ° C) 10 parts by weight (Estock A manufactured by Sekisui Chemical Co., Ltd.) Paraffin wax 0.3 〃 (melting point 66 ° C) Calcium carbonate 1 〃 - (2'-hydroxy-5'-methylphenyl) - benzotriazole 2.5 〃 toluene / 2-butanone (2/1) 40 〃

A 25 μm thick polyethylene terephthalate film was coated and dried using a gravure coater to a release weight of 2.0 g / m ² to form a release layer (12). The above-mentioned hologram forming layer coating material was dried on the layer with a gravure coater to give a dry weight of 0.9 g.
/ M ² so that the hologram forming layer (1
3) is formed, and after aging at 60 ° C. for 72 hours, the hologram forming layer and the hologram pattern forming surface of the stamper are overlapped with a press machine, and embossing is performed at 160 ° C. under heating and pressure conditions of 40 kg / cm. Then, a hologram pattern was formed on the hologram formation surface. Next, ZnS was vapor-deposited to a thickness of about 500 on the hologram forming surface to form a transparent thin film layer (14). In addition, the image
Adhesive layer paint is gravure coater and dry weight is 5.0g /
An image receiving / adhesive layer (15) was formed by coating and drying so as to have a surface area of m ² , and a transfer sheet was manufactured. Using the transfer sheet thus obtained, a card was manufactured under the same conditions as in <Example 1>.

<Example 3> {Production of transfer sheet} Composition of release layer coating composition Epoxy resin (softening point 148 ° C) 10 parts by weight (Epiate 1009 manufactured by Yuka Shell Co., Ltd.) Polyethylene powder 0.5〃 toluene / 2-Butanone (1/2) 40 〃 Composition of hologram forming layer paint Acrylic polyol resin 25 parts by weight (TG: 75 ° C, OH value: 100) Nitrocellulose resin 5 〃 (Nitrogen content: 12%, average degree of polymerization: 45, Viscosity: 1/2) Xylene diisocyanate 5〃 Toluene / 2-butanone (25/20) 45〃 Isobutylene acetate 20〃 Composition of primer layer coating 100 parts by weight of polyurethane ionomer aqueous dispersion (DIC Hydran AP40, NV : 20% by weight) Composition of image-receiving / adhesive layer coating Linear saturated polyester resin (T g; 65 ° C.) 10 parts by weight (Unitika Ltd. UE-3200) N- (2-hydroxyethyl) -12-hydroxystearic acid amide (melting point 105 ° C.) 0.3 〃 polytetrafluoroethylene (softening point 320 C) 1 〃 (Lubrone LD1 manufactured by Daikin Industries, Ltd.) 2-hydroxy-4-methoxybenzophenone 6 〃 Toluene / 2-butanone (1/1) 40 〃

A 25 μm-thick polyethylene terephthalate (PET) film was coated with the above-mentioned release layer coating material to a dry weight of 2.0 g / m ² using a gravure coater and dried to form a release layer (12). Formed. The hologram-forming layer coating composition was applied onto the layer with a gravure coater so as to have a dry weight of 0.9 g / m ² and dried to form a hologram-forming layer (13), which was then aged at 60 ° C. for 72 hours. Then, the hologram forming layer and the hologram pattern forming surface of the stamper were overlapped with a pressing machine, and embossing was performed under the conditions of 160 ° C. and 40 kg / cm ² of heating and pressurization to form a hologram pattern on the hologram forming surface.

Next, ZnS was vapor-deposited to a thickness of about 500Å on the hologram forming surface to form a transparent thin film layer (14).
A primer layer (16) was formed on the layer by coating and drying the above primer layer coating material using a gravure coater so that the dry weight was 1.0 g / m ² . Furthermore, the dry weight of the above image-receiving / adhesive layer paint was 1.5 using a gravure coater.
by coating and drying so as to g / m ² receiving-adhesive layer (1
5) was formed to produce a transferred sheet. Using the transfer sheet thus obtained, a card was manufactured below under the same conditions as in <Example 1>.

<Examples 4, 5, 6><Example1> except that the addition amount of carnauba wax in the image-receiving / adhesive layer paint was 0.05 parts by weight, 1 part by weight, and 2 parts by weight, respectively. In the same manner as in <Example 1>, a sheet to be transferred was formed, an image was formed, and the image-receiving / adhesive layer was transferred to a card, which were respectively <Example 4>, <Example 5>, and <Example 6>.
>

<Comparative Example 1> In <Example 1>, except that carnauba wax is not added to the image-receiving / adhesive layer coating material.
A transfer sheet was produced and transferred to a card in the same manner as in Example 1>.

Comparative Example 2 A transfer sheet was prepared in the same manner as in Example 1 except that 3 parts by weight of carnauba wax was added to the image-receiving / adhesive layer in <Example 1> and transferred to a card. did.

Regarding <Example 1> to <Example 6> and <Comparative Example 1> to <Comparative Example 2>, fusion bonding of the dye film and the transfer target sheet when sublimation transfer was performed with the dye film,
Table 2 shows the adhesiveness, scratch resistance, solvent resistance, heat resistance, tamper resistance, and light resistance of the card (image forming body) produced by thermally transferring the transfer target sheet to the image forming substrate.

[0049]

[Table 2]

Each data was tested by the following method. Fusing: When sublimation transfer, the image-receiving / adhesive layer of the transfer sheet and the dye film are not fused, ◯; those that are not fused but have a large peeling noise are Δ, and those that are fused are x. Adhesiveness ... Cellotape peeling test (JIS K5400-1
990 / cross-cut tape method), those that do not change are ○, those that can be partially taken are △, those that can be taken are ×. Scratch resistance: Scratch the surface with a pencil of H to measure the strength. ○ those that are not scratched, × those that are scratched. Solvent resistance: Soak ethanol and gasoline into a cotton swab,
Rub the surface of the card and observe the change. The ones that did not change at all were ○, and the ones that changed even once were ×. Heat resistance ... 50 ° C., 90% R.C. H. Stored under the environment for 48 hours and observe the discoloration of the image. The one that does not change is ○, and the one that has faded is ×. Tamper-proof property: ○ that the hologram pattern can be clearly recognized, × if the hologram pattern cannot be recognized, and △ if the hologram pattern is not clear. Light resistance: After irradiating ultraviolet rays for 40 hours with a fade meter, measure the reduction rate of the reflection density of the image.

[0051]

As described above, the transfer sheet according to the present invention has wax or wax and filler in the image-receiving / adhesive layer, so that the thermoplastic resin in the image-receiving / adhesive layer is melted by heat. Even when the temperature is low, the image receiving / adhesive layer does not transfer to the dye film side in the process of forming the image pattern, and the adhesiveness of the image receiving / adhesive layer to the image display substrate is good. is there. Further, since the thermoplastic resin in the image receiving / adhesive layer has a glass transition point of 50 ° C. or higher, image change due to heat does not occur. Furthermore, when wax was used, there was a tendency that the transfer density at the time of sublimation transfer using a dye film increased. Also, by forming an image pattern made of sublimable dye on the image receiving / adhesive layer of the transfer sheet, and then transferring it to the surface of the image display base material made of a plastic material or the like, chemical and mechanical damage of the image pattern is prevented. It is possible to manufacture an image forming body which is capable of preventing discoloration due to light and capable of preventing falsification by hologram formation.

After all, an image is received by using a sublimable dye.
When the image pattern is formed on the adhesive layer, there is no heat fusion between the dye film and the image receiving / adhesive layer, and the thermal responsiveness for forming the image pattern is high, and the transfer sheet is attached to the image display substrate. There was little deterioration of the image pattern and damage to the image display body at the time of thermal transfer, and further sufficient adhesiveness to the image display substrate was obtained, and it was possible to provide a transfer sheet satisfying the above.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an outline of an embodiment of a transfer sheet according to the present invention using a sectional view.

FIG. 2 is an explanatory view showing the outline of another embodiment of the transfer sheet according to the present invention by using a sectional view.

FIG. 3 is an explanatory diagram showing an outline of a state after the transfer target sheet shown in FIG. 1 is transferred to a card body, using a cross-sectional view.

FIG. 4 is an explanatory diagram showing an outline of an example of an apparatus for manufacturing an image forming body using the transfer-receiving sheet according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Transferred sheet 2 ... Card main body 2a ... Image pattern 3a ... Hologram pattern 11 ... Base film 12 ... Release layer 13 ... Hologram forming layer 14 ... Transparent thin film Layer 15 ... Image receiving / adhesive layer 16 ... Primer layer 20 ... Sublimation transfer part 21 ... Drum 22 ... Thermal head 23 ... Dye film 24 ... Conveying roller 30 ... Transfer Part 31 ... Transfer roll 32 ... Image display substrate

Claims (3)

[Claims] 1. A heat-resistant base film, on which a peeling layer, a hologram forming layer, which can be easily peeled from the base film,
A transparent thin film layer having a refractive index larger than that of the hologram forming layer,
Then, a transfer sheet is formed by sequentially laminating an image receiving / adhesive layer having at least a thermoplastic resin having a glass transition point of 50 ° C. or higher and a wax having a melting point of 50 to 150 ° C. 2. The wax for the image receiving / adhesive layer is 0.5 to 2 with respect to 100 parts by weight of the thermoplastic resin.
The transfer sheet according to claim 1, wherein the transfer sheet contains 0 part by weight. 3. The image receiving / adhesive layer has a glass transition point of 50.
3. The transfer sheet according to claim 1, which comprises a thermoplastic resin having a temperature of not less than 0.degree. C., a wax having a melting point of 50 to 150.degree. C., and a filler.