JP2693686B2 - Active energy ray-curable adhesive for transfer of heat-sensitive foil and method for transferring foil using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-sensitive foil transfer adhesive useful in the printing field and a method for transferring foil using the same.

[0002]

2. Description of the Related Art In the field of printing, so-called "foil stamping", in which a hot-melt adhesive is applied to a vapor-deposited metal film, heat is applied to a marking processed into an arbitrary pattern, and the marking is pressed onto a substrate to transfer a metal film That method has been practiced since ancient times. At present, foil stamping is used in various products as a means for adding value to packages, plastic containers, toys, household products, and the like. However, this method had the following problems. 1) It takes time and money to produce the stamp. 2) Sufficient resolution cannot be obtained.
3) Since it is difficult to apply pressure uniformly in a large area, it is not suitable for a large area. 4) In a heat-sensitive base material, the base material is deformed by partial heat and pressure. 5) Since the pattern is formed by the stamp, it is basically a concave pattern.

As a method for solving this, Japanese Patent Laid-Open No. 53-
Japanese Patent No. 33723 discloses a method in which a general ink and a transfer agent are printed on the surface of a hard and solid substrate, dried and solidified, and then pressed by a heat roll through a metal foil to form a foil pattern only on a desired portion. ing. However, this method requires a process of evaporating the solvent or water. Since the liquid evaporates, the volume decreases, and it is difficult to form a pattern with a sense of volume. Also, when a solvent is used, the working environment is greatly deteriorated by the solvent vapor. Furthermore, in order to evaporate the solvent or water, heat energy, a drying device and evaporation time are required, which is not preferable in terms of work.

Japanese Unexamined Patent Publication No. 62-255185 discloses a method for forming a toner image and transferring the foil only to that portion as a simple thermal transfer device. However, in order to form a toner image, a complicated electrostatic recording device is required and a base material having a regular shape is required. Further, the toner image has a low resolving power and has a drawback of picking up noise in unnecessary portions. Also, as with image formation by evaporation, a pattern with a sense of volume cannot be expected.

On the other hand, from the viewpoints of high productivity, clean environment without using solvent, ovenless space saving and energy saving, various products using ultraviolet rays and electron beams have attracted attention, and inks, coating agents, adhesives , Is used as a sealant, a molding agent, etc. However, most hot-melt pressure-sensitive adhesives are interlining adhesives and tape adhesives.

In JP-A-58-108275, an ionizing radiation-curable pressure-sensitive adhesive composition has a molecular weight of 5,000 to 30.
An adhesive using 0000 monofunctional acrylics, 5 to 40 parts by weight of monofunctional acrylic monomers, and 0.01 to 10 parts by weight of difunctional monomers is disclosed. However, since the molecular weight of acrylic is as large as 5,000 or more, the viscosity of the adhesive is high, which makes it unsuitable for printing at room temperature. Further, JP-A-59-1
No. 76370, a pressure-sensitive adhesive composition capable of undergoing radical crosslinking by ultraviolet rays or electron beams, JP-A-61-218672.
In the publication, ionizing radiation curable hot melt adhesive,
JP-A-3-115481 discloses an active energy ray-curable pressure-sensitive adhesive composition and the like. However, it is a necessary condition to process these in a heat-melted state.

Japanese Unexamined Patent Publication No. 61-9479 discloses a heat-sensitive adhesive containing an acrylic polymer and a crystalline plasticizer. However, even after irradiation with active energy rays
Since the adhesiveness remains for about 24 hours, it is not suitable for general printing work in which the printed matter is sticked and used for post-processing.

On the other hand, attempts have been made to add a thermoplastic component to some extent for the purpose of improving the adhesiveness of inks and coating agents, imparting flexibility, and enhancing the surface curability. JP-A-52-113810 discloses a method in which a ketone resin or an epoxy resin is added to an ink containing wax for the purpose of imparting adhesion, and JP-A-59-103793.
In JP-A-57-5, in order to improve the adhesiveness of UV varnish, a composition containing a thermoplastic resin as an undercoating agent is applied and the UV varnish of the overcoating is cured at the same time.
In Japanese Patent No. 3572, a method of adding saturated polyester in order to simultaneously satisfy solvent resistance and adhesiveness, JP-A-2-2
Japanese Patent No. 48469 discloses a method of using a long linear bifunctional acrylic monomer and a monofunctional monomer that reduces the crosslink density in order to make the coating agent follow the thermoforming of the substrate. However, these are intended to suppress the curing shrinkage and the crosslink density to some extent and improve the adhesiveness and flexibility of the coating material, and do not positively utilize the adhesiveness at the time of heating.

A method of using an ultraviolet curable resin for foil stamping has also been disclosed. Japanese Unexamined Patent Publication No. 60-187583 discloses a hot stamping foil and a method for producing a hairline using UV ink.
Japanese Patent No. 287 discloses a scratch sheet and a method of using UV ink as a scratch printing method thereof. However, the former utilizes the quick curing property and the feeling of volume of the ink, and the latter utilizes the releasability of the UV ink.

[0010]

As described above, up to now, there has not been disclosed a transfer system utilizing thermal adhesiveness with UV ink. For the above reasons, there has been a demand for a highly productive method capable of printing and foil stamping at room temperature under a space-saving, energy-saving and clean environment.

[0011]

As a result of intensive studies to solve the above problems, the present inventor has found that the irradiation of active energy rays as an energy source causes the film to harden apparently and strongly react with the base material. We succeeded in developing a heat-sensitive foil transfer adhesive that adheres and softens when heated even after curing. Moreover, the inventors have found that the foil can be easily formed on the substrate by using the heat-sensitive foil transfer adhesive, and have completed the present invention.

The present invention is an active energy ray-curable adhesive for heat-sensitive foil transfer, which is cured by irradiation with active energy rays to form a solid cured product at room temperature and heat-bonds a foil to the surface of the cured product. With respect to the heat softening resin component 15 parts by weight to 70
By weight, at least one acryloyl group, at least one methacryloyl group and / or containing a polymerizable monomer component having a vinyl group 30 parts by weight to 80 parts by weight, and the thermosoftening resin component, 60 ℃ or more, 200 ℃
Thermoplastic resin with the following softening point, 60 ℃ or more, 200 ℃
Thermosetting resin having the following softening point and 60 ° C or higher, 200
80% by weight of the polymerizable monomer component selected from the group consisting of synthetic rubbers having a softening point of ℃ or less
The above relates to the active energy ray-curable adhesive for heat-sensitive foil transfer, which is occupied by the polymerizable monomer component having one polymerizable unsaturated double bond.

The present invention also provides a polymerizable monomer component having 15 to 70 parts by weight of a thermosoftening resin component and at least one acryloyl group, at least one methacryloyl group and / or one vinyl group. Part to 80 parts by weight, and the thermosoftening resin component, 60 ℃ or more,
Thermoplastic resin having a softening point of 200 ° C or lower, 60 ° C or higher,
Selected from the group consisting of thermosetting resins having a softening point of 200 ° C or lower and synthetic rubbers having a softening point of 60 ° C or higher and 200 ° C or lower, and among the polymerizable monomer components
80% by weight or more is occupied by the polymerizable monomer component having one polymerizable unsaturated double bond, and one molecule of the heat-softenable resin component is 1 or less on average in an acryloyl group and / or a methacrylic compound. The present invention relates to an active energy ray-curable adhesive for heat-sensitive foil transfer, which has an acryloyl group.

According to the heat-sensitive foil transfer adhesive of the present invention, since no organic solvent is used for coating, the working environment and the atmosphere are not polluted. Further, since it is an active energy ray-curable type, it is possible to form a dry cured product of a heat-sensitive foil transfer adhesive in a very short time. This curing speed is determined only by the amount of energy at the time of substantially irradiating the active energy ray, so that the curing can be performed at a very high speed if an irradiation machine is appropriately selected. Therefore, it also saves energy and is very productive.

Since this heat-sensitive adhesive can be cured by ultraviolet rays or electron beam equipment, for example, in the case of ultraviolet rays, it can be produced by a very compact irradiation device. Therefore, it can be manufactured even in a work environment with a small space. And, before curing, it is 200c at room temperature.
Since low viscosity liquid of about ps to high viscosity can be realized,
Most coating and printing methods can be used to make the heat-sensitive adhesive coating. Therefore, by appropriately selecting the printing method, a pattern of the heat-sensitive adhesive having a very high resolution can be realized. In addition, since this liquid is 100% cured by active energy rays and has no evaporative component, the painted or printed one maintains its volume almost even after curing. Therefore, a very volumetric coating or pattern is obtained.

When it is desired to impart solvent resistance to the heat-sensitive adhesive of the present invention, a heat-softenable resin component having the appropriate required solvent resistance and the above-mentioned polymerizable monomer component are selected. The polymerizable monomer component having two or more saturated double bonds is added in an amount of 20% by weight or less based on the entire polymerizable monomer component. In addition, by combining an appropriate catalyst, curing agent, curing accelerator, drying agent, etc., with a reactive resin component, after apparent curing, the curing proceeds further, and the adhesiveness, hardness, heat resistance and resistance of the cured coating are improved. Physical properties such as solvent property can be improved.

Examples of the thermoplastic resin having a softening point of 60 ° C. or higher and 200 ° C. or lower include polyethylene resin, chlorinated polyethylene resin, ethylene vinyl acetate copolymer resin, ethylene acrylate ester copolymer resin, polypropylene, polystyrene and copolymers thereof. Polymers, vinyl chloride and the following copolymers (vinyl chloride vinyl acetate copolymer resin, vinyl chloride vinylidene acetate copolymer resin, vinyl chloride acrylonitrile copolymer, ethylene vinyl chloride copolymer, EVA vinyl chloride copolymer, chloride Vinyl acrylic ester copolymer), vinylidene chloride, the following vinyl acetate resins (polyvinyl acetal, polyvinyl butyral), cellulose acetate butyrate, polyamide resins such as nylon 6,66,8,11, methoxylated acrylamide resin ,
Examples include saturated polyester.

Examples of the thermosetting resin having a softening point of 60 ° C. or more and 200 ° C. or less include unsaturated polyester, epoxy resin, polyurethane resin, phenol resin, alkyd resin, and glycidyl methacrylate ester.

Among the above-mentioned thermoplastic resins and thermosetting resins, those which can be acrylated are added with an acryloyl group and / or a methacryloyl group to enhance the curing rate, chemical properties and physical properties. You can However, the addition of one or more (meth) acryloyl groups to one molecule of the resin component excessively raises the softening point, and lowers the thermal softening property and thermal adhesiveness.

Also known as tackifiers are rosin and its derivatives, terpene resins, petroleum resins and coumarone.
An indene resin or the like can be added to the above resin component in an appropriate amount in order to adjust the softening property and the tackiness.

The following can be exemplified as the "polymerizable monomer component" used in the present invention. N-vinylpyrrolidone, styrene, vinyl acetate, vinyltoluene, 2-ethylhexyl (meth) acrylate, isodecyl (meth)
Acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, isooctyl (meth) acrylate, methoxydiethylene glycol (meth) acrylate, methoxypolyethylene glycol 1000
(Meth) acrylate, cyclohexyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, isobornyl (meth) acrylate, dicyclopentenyl (meth) acrylate, N, N dimethylaminoethyl (meth) acrylate, tetrafluoropropyl (meth ) Acrylate, heptadecafluorodecyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, hydroxydiethylene glycol methacrylate, butoxyhydroxypropyl (meth) acrylate, phenoxyhydroxypropyl (meth) acrylate, allyl (meth) acrylate, glycidyl meta. Acrylate, monoacryloxyethyl phthalate, etc.

80% by weight or more of the polymerizable monomer component is occupied by the polymerizable monomer component having one polymerizable unsaturated double bond (monofunctional monomer component).
That is, a polymerizable monomer component (polyfunctional monomer component) having two or more polymerizable unsaturated double bonds is used to accelerate the curing of the adhesive, increase the softening point, scratches, and physical properties after curing such as blocking resistance. Also, for the purpose of improving chemical performance such as chemical resistance, it can be added in a proportion of 20% by weight or less. If it exceeds 20% by weight, the physical and chemical properties are improved, but the adhesion to the substrate is reduced, the adhesive strength during heat bonding is reduced due to the increase in the softening point accompanying the increase in crosslink density, and excessive adhesion during bonding. Problems such as the need for heating occur, which is not desirable.

Examples of the polymerizable monomer component having two or more polymerizable unsaturated double bonds (polyfunctional monomer component) include neopentyl glycol (meth) acrylate and 1,6-
Hexanediol di (meth) acrylate, diethylene glycol di (meth) acrylate, tripropylene glycol di (meth) acrylate, hydroxypivalate neopentyl glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, ethoxylated trimethylol Propane tri (meth) acrylate, ditrimethylolpropane tetra (meth)
Examples thereof include acrylate, pentaerythritol tri (meth) acrylate, tris (acryloxyethyl) diisocyanurate, ethoxylated bisphenol A (meth) acrylate, and hydroxypropyl dimethacrylate.

When more chemical and physical performances are required, a thermosetting resin having a softening point of 60 ° C. or more and 200 ° C. or less, as well as a generally known curing agent, polymerization catalyst, reaction accelerator Etc. are added, adjusted and applied, the polymerizable monomer component is cured with an active energy ray to form a cured film, and after heat-bonding treatment, a thermosetting resin is further added by heat treatment and / or passage of time. The method of hardening can be taken.

This method has the following preferred modes. When a phenol resin is used as the thermosetting resin, an amine-based curing agent, and when an unsaturated polyester is used, a polymerization catalyst such as benzoyl peroxide or methyl ethyl ketone peroxide using styrene or vinyl acetate monomer as a solvent. , A reaction accelerator such as cobalt naphthenate can be added. When using an alkyd resin, a drying agent such as a dry, semi-dry or non-drying oil fatty acid, and when using an epoxy resin, an amine-based, polyamine-based, polyamide-based, acid anhydride, polysulfide, etc. When a curing agent or polyurethane resin is used, an isocyanate such as 2,4-toluene diisocyanate or triisocyanate and a polyhydric alcohol can be added.

However, a solution containing a curing agent or the like has a limited life from preparation to application because the solution itself cures with time. Also, after making it an adhesive cured film,
Since the curing progresses with time, the service life of the adhesive is limited, and it is necessary to select and adjust the curing agent according to the purpose.

When the heat-sensitive adhesive is cured by ultraviolet rays, a generally known ultraviolet polymerization initiator is necessary because it causes a photopolymerization reaction. Examples of the UV polymerization initiator that can be used for this purpose include benzoin-based, benzophenone-based, sulfonyl halide-based, quinone-based, and ketone-based. Such an ultraviolet polymerization initiator can be used in one kind or a mixture of two or more kinds. The amount of UV polymerization initiator added is 0.5 parts by weight or more,
15 parts by weight or less is suitable. If the amount is less than 0.5 part by weight, the photopolymerization reaction is very slow and cannot be practically used. On the other hand, if it exceeds 15 parts by weight, the curing rate cannot be expected any more, which is uneconomical and not preferable. A generally known photoinitiating aid such as amines, sulfones, and phosphines can be used together with the ultraviolet polymerization initiator to promote curing.

The heat-sensitive adhesive of the present invention includes thermal polymerization inhibitors used in active energy ray-curable inks and paints, organic or inorganic pigments, paints, dispersants, leveling agents, defoaming agents,
If necessary, an organic solvent or the like can be added in an appropriate amount.

As the method for blending the polymerizable monomer component and the heat-softenable resin component, a method of dissolving the resin component in the monomer component at room temperature or by heating and stirring, or a heat-softening which does not dissolve in the monomer component as in the case of general resin dissolution There is a method of dispersing the functional resin powder with a disperser. As the disperser, a generally known medium disperser such as a dissolver, a roll mill, a ball mill and a sand mill can be used. When used in a dispersed state, a generally used surfactant should be used in an appropriate amount for the purpose of increasing dispersibility, improving dispersion stability, adjusting the viscosity of the solution, etc. Can be done.

By the method of dissolving the resin component in the polymerizable monomer component, a transparent and uniform coating film can be obtained, but the cured product thereof tends to be slightly inferior in chemical resistance. In the method of dispersing in a monomer component, a thermosoftening resin powder having high chemical resistance can be used, which is advantageous in a field where chemical resistance is required. However, in order to form a uniform film to some extent, the particle size of the resin powder is preferably 0.5 to 100 microns, more preferably 1 to 20 microns. It is also possible to further disperse the powdery thermosoftening resin component in the thermosoftening resin component dissolved in the monomer.
In that case, it is preferable that the addition amount of the heat-softening resin component of the powder is 100 parts by weight or less with respect to 100 parts by weight of the heat-softening resin component dissolved in the monomer component. This is because if it exceeds this, the viscosity of the adhesive increases excessively and it becomes difficult to apply.

A film comprising the heat-sensitive adhesive of the present invention can be formed on the surface of a substrate, the film can be cured by irradiation with active energy rays, and then the foil can be thermally adhered to the surface of the cured film. By appropriately selecting the viscosity and thixotropy of the heat-sensitive adhesive and the printing method, it is possible to obtain a pattern with a sharp edge and a high resolution, which could not be realized with the foil stamping pattern by engraving up to now. Further, since the printed portion has a convex shape and the surface of the printed portion is smooth, it is possible to uniformly apply pressure with a hot roll or the like. Also, a foil pattern having a large area can be easily obtained. Furthermore, it is easy to form an appropriate blank pattern in the pattern.

Further, when the foil is heat-bonded to the surface of the cured coating comprising the heat-sensitive adhesive of the present invention, the adhesive strength of the heat-sensitive adhesive is sufficient. I can. Therefore, it is not necessary to properly use the foil depending on the base material. Of course, the adhesive force between the hot melt layer between the base material and the adhesive, and between the adhesive and the foil is sufficiently larger than the adhesive force between the base material and the hot melt layer. For this reason, it is possible to use a foil that has been hot-melt processed under conditions of lower temperature and lower pressure that are generally used, and in this case, it is possible to take advantage of the fact that the width of processing can be widened.

As a method for forming a coating film comprising the active energy ray-curable adhesive of the present invention on the surface of a substrate, a roll coater, an extrusion coater, a knife which are known for general coating processing and heat-sensitive adhesive processing. Examples thereof include coaters such as coaters, curtain coaters, and gravure coaters, and applicators. As a method of forming a planar pattern of the coating, offset printing,
Patterning by a printing machine such as gravure printing, screen printing and flexo printing can be applied.

When the coating base material and the adhesive base material are smooth to some extent, the heat-sensitive adhesive layer can be formed by offset printing, gravure printing, flexographic printing or the like, which can obtain an adhesive force even with a relatively thin film. Screen printing is desirable when the adhesive substrate is porous or when it is desired to give the adhesive layer a particular sense of volume. By using the screen printing method, it is easy to form a foil pattern with a sense of volume with a thick film of about 500 microns.

Further, by using a potting method in which a natural curve due to the surface tension is produced by a dispenser, it is possible to obtain a foil pattern having a feeling of volume and a feeling of high quality. In this case, the heat press and heat roll are
It is preferably made of a soft material that can follow the three-dimensional shape of the raised coating.

UV curable ink (UV ink)
In, since the crosslinking proceeds sufficiently densely during curing,
The foil is unlikely to adhere to the cured coating. Therefore, after curing the coating composed of the adhesive of the present invention, a UV ink coating for releasing is formed on a part of the surface of the cured coating for adhesion, and the coating is cured by irradiation of ultraviolet rays. It is possible to obtain a cured coating for release and heat bond the foil only to the exposed portion of the surface of the cured coating for adhesion.

The thickness of the heat-sensitive adhesive coating is preferably 0.5 to 10000 microns, more preferably 10 to 5000 microns. If it is 0.5 micron or less, sufficient adhesive force cannot be obtained, and if it is 10,000 micron or more, curing may be insufficient, which is not preferable as an adhesive.

When irradiating with an electron beam as an active energy ray source for curing the heat-sensitive adhesive of the present invention, an accelerating voltage of 30
From 0 KV to 2.0 MV accelerator, 0.5 Mrad to 10 Mrad
It is preferable to irradiate with an absorbed dose of the electron beam in an inert gas atmosphere. When ultraviolet rays are irradiated as an active energy ray source, it is preferable to irradiate ultraviolet rays having a wavelength of 2500 nm to 4500 nm in an inert gas or the atmosphere with an irradiation energy amount of 50 mJ / cm ² to 2000 mJ / cm ² .

Examples of equipment that can be used for heat-bonding the foil include a heat-sealing machine, a dry lamination apparatus, an iron, a heat press machine, and a heat roll.
It is necessary to set the temperature of the equipment above the softening point of the heat-sensitive adhesive, but the parameters of pressure, temperature, and treatment time vary depending on the softening point, the cured film thickness, and the purpose of use. Preparation of heat-sensitive adhesive and setting of the above parameters are required.

As described above, the heat-sensitive adhesive of the present invention and the foil transfer method using the same have the same workability, productivity, environment and energy in the foil processing in the printing field as compared with the conventional foil pressing and heat-sensitive adhesive. It has various features not found in the industry and has an extremely high industrial value.

[0041]

[Examples] The active energy ray-curable heat-sensitive adhesives of the present invention and comparative examples were produced below, and it was examined whether or not the foil could be actually transferred. Then, the foil adhesion, substrate adhesion, ethanol resistance, and scratch resistance were also examined. The results are summarized in Tables 1 and 2.

(Example 1-1). Ethylene-vinyl acetate copolymer resin (thermosoftening resin component) "Smitate KE1
0 "(manufactured by Sumitomo Chemical Co., Ltd.) and 20 parts by weight of tetrahydrofurfuryl acrylate (monofunctional monomer component)" light ester THF-A "(Kyoeisha Oil and Fat Chemical Co., Ltd.)
80 parts by weight), heated to 60 ° C., and stirred to obtain a viscous solution. UV polymerization initiator 2,2-dimethyl-
2-Phenylacetone Phenone "Irgacure 651"
(Ciba-gaigi product) 5 parts by weight, "Floren AC-1140" (manufactured by Kyoeisha Oil and Fat Chemical Co., Ltd.) as an antifoaming agent 1
By adding parts by weight, a heat-sensitive adhesive for screen printing was prepared.

After printing this on a paper with a 150 mesh screen plate, a high pressure mercury lamp (made by Eye Graphic) 80W,
The film was exposed and cured under the conditions of 3 lights and 10 m / min to obtain a planar pattern having a film thickness of 25 μm. 120 iron surface temperature
The temperature was set to 0 ° C., and the foil was pressed for 2 seconds through a foil without adhesive layer (manufactured by Oike Industry Co., Ltd.). When the foil film was peeled off, a clear foil pattern with a film thickness of 2 microns was obtained.

Next, the characteristics of this foil were examined, and the results of each characteristic are shown in Tables 1 and 2. Foil adhesiveness, base material adhesiveness: "Cellotape No.405" (manufactured by Nichiban Co., Ltd.) was attached to the foil part, and then this tape was peeled off, but the adhesive layer (cured film) and foil were peeled off. Without it, neither the adhesive layer nor the paper was peeled off. In Table 1, both the foil adhesiveness and the substrate adhesiveness are indicated by “◯”. Ethanol resistance: When the foil was dipped in 99.5% ethyl alcohol at 30 ° C. for 3 hours, the cured coating swelled and peeled off when the foil was rubbed with a finger. In Table 1, "x" is indicated. Scratch resistance: When the fine character portion of the foil was strongly scratched with the nail of a pencil having a pencil hardness of 2B, peeling occurred on the foil. In Table 1, "△" is displayed.

(Example 1-2). Polyvinyl butyral (thermosoftening resin component) "2000L" (manufactured by Denki Kagaku Kogyo Co., Ltd.) 25 parts by weight of N-vinylpyrrolidone (monofunctional monomer component) "Aronix M-150" (manufactured by Toagosei Co., Ltd.) ) 75 parts by weight, heated to 60 ° C. and stirred to obtain a viscous solution. UV polymerization initiator 2,2-
5 parts by weight of dimethyl-2-phenylacetone phenone "Irgacure 651" (manufactured by Ciba-Geigy) was added to prepare a heat-sensitive adhesive for potting.

This is hung on a polycarbonate sheet,
After making the diameter 3 cm and the thickness 3 mm, the metal halide lamp (manufactured by Eyegraphic) 120 W, 1 light, exposed and cured under the condition of 3 m / min, the film thickness 3 mm formed by the surface tension.
A circular pattern of Surface temperature of heat press machine is 150 ℃
And was pressed for 1 second through a foil without adhesive layer (manufactured by Oike Industry Co., Ltd.). Shore A of the press surface at this time
The hardness was 40. When the foil film is peeled off, the film thickness is 3 mm
A clear foil pattern was obtained.

Furthermore, when the characteristics of this foil were examined, the same results as in Example 1-1 were obtained with respect to foil adhesion, substrate adhesion, ethanol resistance, and scratch resistance.

(Examples 1-3). Powder polyester (thermosoftening resin component) "Flowhard Q24201" (manufactured by Sumitomo Seika Chemical Co., Ltd.) 50 parts by weight of 2-hydroxy-3-phenoxypropyl acrylate, (monofunctional monomer component)
50 parts by weight of "epoxy ester M-600A" (manufactured by Kyoeisha Oil and Fat Chemical Co., Ltd.) was added and dispersed using a roll mill. As a defoaming agent, "Floren AC-114
0 "(manufactured by Kyoeisha Oil and Fat Chemical Co., Ltd.) was added to prepare a heat-sensitive adhesive.

Approximately 10 cm × this on paper with a No12 wire bar
After applying 10 cm, electron beam irradiation device "Curetron"
(Nisshin High Voltage Co., Ltd.) was used to irradiate and cure at a dose of 6 Mrad to obtain a square pattern having a film thickness of 100 μm. The surface temperature of the heat roll was set to 130 ° C., the foil (made by Kurz) having the adhesive layer was overlapped, and the foil was passed at a speed of 10 cm / sec for transfer. When the foil film was peeled off, a clear solid foil pattern with a thickness of 10 microns was obtained.

The "foil adhesion", "base material adhesion" and "scratch resistance" of this foil were the same as in Example 1-1. Also, when the foil was immersed in 99.5% ethanol at 30 ° C. for 3 hours, the coating swelled slightly. "△" is shown in the item of "ethanol resistance" in Table 1.

(Examples 1-4). Para-vinyl phenol polymer (thermosoftening resin component) "Maruka Linker M"
(Maruzen Petrochemical Co., Ltd.)
92 "(monofunctional monomer component) (Osaka Organic Chemical Co., Ltd.)
(Manufactured by K.K.), heated to 50 ° C. and stirred to obtain a solution having a relatively low viscosity. 5 parts by weight of an ultraviolet polymerization initiator "Darocur 1173" 2-hydroxy-2-methyl-1-phenylpropan-1-one (manufactured by Merck) and 2 parts by weight of D-009 (manufactured by German Acitive) as an antifoaming agent. Was added to prepare a heat-sensitive adhesive for screen printing.

After printing this on a hard vinyl chloride sheet with a 300 mesh screen plate, it was exposed and cured under the conditions of a high pressure mercury lamp (manufactured by Eye Graphic) 80 W, 3 lights, 10 m / min, and a figure pattern with a film thickness of 10 microns was formed. Obtained. UV screen ink Hayatone PF (Hayakawa Rubber Co., Ltd.)
Print and expose the fine print on a 330 mesh plate using
Cured. The surface temperature of the heat roll was set to 130 ° C., and a foil without adhesive layer (manufactured by Oike Kogyo Co., Ltd.) was overlaid and passed at a speed of 10 cm / sec for transfer. When the foil film was peeled off, a characteristic foil pattern was obtained in which there was no foil on the cured film of the UV ink and there was foil only around it. Further, with respect to this foil, the same results as in Example 1-3 were obtained with respect to foil adhesion, substrate adhesion, ethanol resistance, and scratch resistance.

(Example 1-5). Saturated polyester (thermosoftening resin component) "Chemit K-640" (Toray Industries, Inc.)
30 parts by weight of 2-hydroxypropyl acrylate (monofunctional monomer component) "light ester HOP-
A "(manufactured by Kyoei Yushi Kagaku Kogyo Co., Ltd.) was added to 70 parts by weight and stirred to dissolve. To this, 5 parts by weight of an ultraviolet polymerization initiator 2,2-dimethyl-2-phenylacetone phenone "Irgacure 651" (manufactured by Ciba-Geigy) and 3 parts by weight of "Aerosil 200" (manufactured by Nippon Aerosil Co., Ltd.) as a thixotropic agent were added. A heat sensitive adhesive for screen printing was prepared.
After printing this on the leather with 100 mesh screen version,
Metal halide lamp (made by eye graphic) 120 W,
The film was exposed to light at 7 m / min for 1 lamp and cured to obtain a graphic pattern having a film thickness of 150 μm. 120 iron surface temperature
The temperature was set to 0 ° C., and the foil was pressed for 2 seconds through a foil without adhesive layer (manufactured by Oike Industry Co., Ltd.). When the foil film was peeled off, a clear foil pattern with a thickness of 150 microns was obtained.

When the foil adhesion, substrate adhesion, ethanol resistance and scratch resistance of this foil were examined, the same results as in Example 1-1 were obtained. Further, even when the substrate was bent, the cured coating did not crack, and a very flexible cured coating was obtained.

(Examples 1-6). Epoxy resin (thermosoftening resin component) "Sumiepoxy ESA-017" 30 parts by weight of tetrahydrofurfuryl acrylate (monofunctional monomer component) "THF-A" (Kyoeisha Yushi Chemical Industry Co., Ltd.)
35 parts by weight, N-vinylpyrrolidone (monofunctional monomer component) "Aronix M-150" (manufactured by Toagosei Kagaku Kogyo Co., Ltd.) 35 parts by weight, heated at 60 ° C., dissolved by stirring, and compared. A low viscosity solution was obtained. In addition to this, 5 parts by weight of an ultraviolet polymerization initiator 1-hydroxycyclohexyl phenyl ketone "Irgacure 184" (manufactured by Ciba-Geigy), 1.5 parts by weight of a defoaming agent "Floren AC-1140" (manufactured by Kyoeisha Oil and Fat Chemical Co., Ltd.), and a thixotropic agent "Aerosil 2
00 "(manufactured by Nippon Aerosil Co., Ltd.) to prepare a heat-sensitive adhesive for screen printing.

Using a 300 mesh screen plate, 180
Micron PET film "Torel mirror" (manufactured by Toray Co., Ltd.) is printed with fine characters, and metal halide lamp (manufactured by Eye Graphic Co., Ltd.) is cured under the conditions of 120 W, 1 light, 5 m / min. A micron fine pattern was obtained. Insert the printed film and foil without adhesive layer (Oike Kogyo Co., Ltd.) into a heat roll set to a surface temperature of 120 ° C, pass it at 10 mm / sec, and after transfer, peel off the foil film to remove the edge. A foil pattern that was sharp and reproduced up to 7Q was obtained.

The same results as in Example 1-1 were obtained with respect to foil adhesion, substrate adhesion, ethanol resistance, and scratch resistance.

(Examples 1-7) A heat-sensitive adhesive for screen printing was produced in the same manner as in Example 1-6. However, in Example 1-6, 30 parts by weight of an epoxy resin, 35 parts by weight of tetrahydrofurfuriacrylate, 35 parts by weight of N-vinylpyrrolidone, and trimethylolpropane triacrylate “Aronix M-309” which is a trifunctional acrylate (Toa) 5 parts by weight of Synthetic Chemical Industry Co., Ltd. was added. Further, a fine character foil pattern was obtained in the same manner as in Example 1-6.

Regarding the foil adhesiveness, the same result as in Example 1-1 was obtained. Ethanol resistance: The foil was immersed in 99.5% ethanol at 30 ° C. for 3 hours, but no swelling of the cured film was observed and the film did not peel off even if it was rubbed with a finger. In Table 1, the ethanol resistance is indicated by “◯”. Scratch resistance: The fine character part was strongly scratched with the claw of a pencil having a pencil hardness of 2B, but peeling did not occur.
In Table 1, “Scratch resistance” is indicated by “Δ”.

(Examples 1-8) A heat-sensitive adhesive for screen printing was produced in the same manner as in Example 1-6. However, in Example 1-6, 30 parts by weight of an epoxy resin, 40 parts by weight of tetrahydrofurfuryl acrylate, 40 parts by weight of N-vinylpyrrolidone, and trimethylolpropane triacrylate "Aronix M-309" (trifunctional acrylate) ( 20 parts by weight of Toagosei Chemical Industry Co., Ltd.) was added. A fine character foil pattern could be obtained in the same manner as in Example 1-6. The foil adhesiveness and the substrate adhesiveness were the same as in Example 1-1. The ethanol resistance was the same as in Example 1-7. Further, the fine character portion was strongly scratched with the claw of a pencil having a pencil hardness of 3H, but peeling did not occur. In Table 1, “Scrack resistance” is indicated as “0”.

(Examples 1-9) A heat-sensitive adhesive for screen printing was produced in the same manner as in Example 1-6. However, in Example 1-6, 6 parts by weight of imidazole (curing agent) was further added. Example 1 using this adhesive
A fine character foil pattern could be obtained in the same manner as in -6. Furthermore, the base material after forming the foil pattern was placed in an oven, left at 80 ° C. for 30 minutes, and further thermoset. The same results as in Example 1-8 were obtained with respect to foil adhesion, substrate adhesion, and ethanol resistance. Further, after the heat curing treatment, the fine character portion was strongly scratched with the nail of a pencil having a pencil hardness of 3H, but the foil did not peel off.

(Comparative Example 1-1). 30 parts by weight of epoxy resin (thermosoftening resin component) (Sumiepoxy ESA-017) was added to tetrahydrofurfuryl acrylate (monofunctional monomer component) "THF-A" (Kyoeisha Yushi-Kagaku Kogyo Co., Ltd.).
35 parts by weight and 1,6-hexanediol diacrylate (polyfunctional monomer component) "light acrylate 1.6
-HX-A "(manufactured by Kyoeisha Yushi Kagaku Kogyo Co., Ltd.), 35 parts by weight were added, and the mixture was heated at 60 ° C. and stirred to be dissolved to obtain a relatively low viscosity solution. UV polymerization initiator, 1-hydroxycyclohexyl phenyl ketone "IRGACURE 18
4 "(manufactured by Ciba Geigy), 5 parts by weight, anti-foaming agent" Floren AC-1140 "(manufactured by Kyoeisha Oil and Fat Chemical Co., Ltd.) 1.5
By weight, 3 parts by weight of "Aerosil 200" (manufactured by Nippon Aerosil Co., Ltd.) as a thixotropic agent were added to obtain a heat-sensitive adhesive for screen printing.

Using a 300 mesh screen plate, thickness
180-micron PET film "Torel mirror" (manufactured by Toray Industries, Inc.) is printed with fine letters, and cured by metal halide lamp (Igraphic Inc.) 120 W, 1 light, 5 m / min. A fine pattern of 10 microns was obtained. Place the printed film and foil without adhesive layer (Oike Kogyo Co., Ltd.) on a heat roll set to a surface temperature of 120 ° C. 1
When the foil film was peeled off after passing through at 0 mm / sec and after the transfer treatment, the foil was not transferred and a foil pattern could not be obtained.

Next, a foil with an adhesive layer (Oike Industry Co., Ltd.)
(Manufactured) and the above film were sandwiched between the above hot rolls and subjected to the above treatment, and a foil pattern was obtained for the time being. However, when "Scotch tape No. 405" (manufactured by Nichiban Co., Ltd.) was attached to the foil part and peeled off, the adhesive layer and the foil,
Both the adhesive layer and the PET film were peeled off. In Table 1, both the foil adhesiveness and the substrate adhesiveness are marked with "x". Further, when the thin character portion was strongly scratched with a claw, peeling easily occurred. In the table, scratch resistance is indicated by "x".

(Comparative Example 1-2). A heat-sensitive adhesive for screen printing was produced in the same manner as in Example 1-6. However, in Example 1-6, 30 parts by weight of an epoxy resin, 35 parts by weight of tetrahydrofurfuryl acrylate, 35 parts by weight of N-vinylpyrrolidone, and trimethylolpropanate acrylate "Aronix M-309" (trifunctional acrylate) ( 30 parts by weight of Toagosei Chemical Industry Co., Ltd. was added. Further, a fine character pattern was obtained in the same manner as in Example 1-6.

A printed film and a foil having no adhesive layer (manufactured by Oike Kogyo Co., Ltd.) were placed on a heat roll set to a surface temperature of 120 ° C.
After the transfer treatment, the foil film was peeled off and the foil was not transferred, and a foil pattern could not be obtained. Next, when the foil having an adhesive layer (manufactured by Oike Industry Co., Ltd.) and the above film were sandwiched between the above heat rolls and subjected to the above treatment, a foil pattern was obtained for the time being. However, each physical property of this foil pattern was the same as that of Comparative Example 1-1.

(Example 2-1). Epoxy resin (thermosoftening resin component) "Sumi Epoxy ES
400 parts by weight of methyl ethyl ketone was added to 400 parts by weight of "A-017", and the mixture was heated to 50 ° C and dissolved. 16 parts by weight of 2-methacryloyloxyethyl isocyanate (MOI) was added thereto, and 0.412 parts by weight of a reaction catalyst di-N-butyltin dilaurate (DBTL) was added while paying attention to heat generation.
The reaction was carried out for 4 hours while maintaining the temperature at 50 ° C. Using an infrared spectrometer, it was confirmed that the absorption peak of the isocyanate group disappeared. This is 0 for 1 molecule of the thermosoftening resin component.
This corresponds to the addition of 88 methacryloyl groups.

300 parts by weight of tetrahydrofurfuryl acrylate (monofunctional monomer) "THF-A" (manufactured by Kyoeisha Oil and Fat Chemical Co., Ltd.) was added to the reaction solution thus obtained.
300 parts by weight of N-vinylpyrrolidone (monofunctional monomer component) "Aronix M-150" (manufactured by Toagosei Chemical Industry Co., Ltd.) was added. Then, using an evaporator,
The solvent was removed at 80 ° C. 100 parts by weight of this solution was taken, and 5 parts by weight of an ultraviolet polymerization initiator 1-hydroxycyclohexyl phenyl ketone "Irgacure 184" (manufactured by Ciba Geigy) and an antifoaming agent "Floren AC-1140" (manufactured by Kyoeisha Oil and Fat Chemical Co., Ltd.) 1.5 2 parts by weight of "Aerosil 200" (manufactured by Nippon Aerosil Co., Ltd.) as a thixotropic agent were added to obtain a heat-sensitive adhesive for screen printing.

Using a 300 mesh screen plate, thickness
180-micron PET film "Torel mirror" (manufactured by Toray Industries, Inc.) is printed with fine letters, and cured by metal halide lamp (Igraphic Inc.) 120 W, 1 light, 5 m / min. A fine pattern of 10 microns was obtained. Put the printed film and foil without adhesive layer (Oike Kogyo Co., Ltd.) on a heat roll set to a surface temperature of 120 ° C.
After passing at 10 mm / sec for transfer, the foil film was peeled off, and a foil pattern with sharp edges and reproduction up to 7Q was obtained.

The fine character part was strongly scratched with a claw, but no peeling occurred. The pencil hardness at that time was 3H. Further, when immersed in 99.5% ethanol at 30 ° C. for 3 hours, no swelling of the coating film was observed and peeling did not occur even when rubbed with a finger. Sellotape No405 (manufactured by Nichiban Co., Ltd.)
Was affixed to the foil portion and peeled off, but no peeling of the adhesive layer from the foil or the adhesive layer from the PET film was observed.

(Example 2-2). A heat-sensitive adhesive for screen printing was obtained in the same manner as in Example 2-1. However, the amount of 2-methacryloyloxyethyl isocyanate MOI added was 12 parts by weight. This corresponds to the addition of 0.65 methacryloyl groups to one molecule of the thermosoftening resin component. Using the heat-sensitive adhesive thus obtained, it was possible to obtain a fine character pattern and a foil pattern in the same manner as in Example 2-1. Then, when the foil adhesiveness, substrate adhesiveness, ethanol resistance, and scratch resistance of this foil pattern were examined, the same results as in Example 2-1 were obtained.

(Comparative Example 2-1). A heat-sensitive adhesive for screen printing was obtained in the same manner as in Example 2-1. However, the amount of 2-methacryloyloxyethyl isocyanate MOI added was 20 parts by weight. This corresponds to the addition of 1.1 methacryloyl groups to one molecule of the thermosoftening resin component. Using the heat-sensitive adhesive thus obtained, a fine character pattern was formed in the same manner as in Example 2-1.

A printed film and a foil without an adhesive layer (manufactured by Oike Kogyo Co., Ltd.) were placed on a heat roll set to a surface temperature of 120 ° C.
After the transfer treatment, the foil film was peeled off and the foil was not transferred, and a foil pattern could not be obtained. Next, when a similar treatment was performed with a foil having an adhesive layer (manufactured by Oike Industry Co., Ltd.) sandwiched between them, a foil pattern was obtained for the time being. However, "Cellotape No 405" (Nichiban Co., Ltd.)
The product) was attached to the foil portion and peeled off. As a result, both the adhesive layer and the foil and the adhesive layer and the PET film were peeled off. Moreover, when the thin character portion was scratched with a strong claw, peeling easily occurred.

(Comparative Example 2-2). A heat-sensitive adhesive for screen printing was obtained in the same manner as in Example 2-1. However, the amount of 2-methacryloyloxyethyl isocyanate MOI added was 20 parts by weight. This corresponds to the addition of 2.2 methacryloyl groups to one molecule of the thermosoftening resin component. Using the heat-sensitive adhesive thus obtained, a fine character pattern was formed in the same manner as in Example 2-1.

A printed film and a foil without an adhesive layer (manufactured by Oike Kogyo Co., Ltd.) were placed on a heat roll set to a surface temperature of 120 ° C.
After the transfer treatment, the foil film was peeled off and the foil was not transferred, and a foil pattern could not be obtained. Next, when a similar treatment was performed with a foil having an adhesive layer (manufactured by Oike Kogyo Co., Ltd.) sandwiched between them, a foil pattern was obtained in part. However, when "Cellotape No 405" (manufactured by Nichiban Co., Ltd.) was attached to the foil and peeled off,
Both the adhesive layer and the foil and the adhesive layer and the PET film were peeled off. Further, when the thin character portion was strongly scratched with a claw, peeling easily occurred.

Tables 1 and 2 show the amounts of the main parts and the physical properties in each of the examples and comparative examples described above.

[Table 1]

[Table 2]

In Examples 1-1 to 1-9, 2-1, 2-2, the foil can be adhered to the cured film even if the foil without the adhesive is used. In Comparative Example 1-1, the polyfunctional monomer component accounts for 50% by weight of the polymerizable monomer component,
In Comparative Example 1-2, it accounts for 30% by weight. In these examples,
Foil without adhesive does not heat bond to the cured coating. Further, although it is possible to heat bond a foil with an adhesive to a cured film, such a foil is inferior in physical properties and the like. Among Examples 1-1 to 1-9, the polyfunctional monomer component was used.
Addition of 20% by weight or less further improves the physical properties of the foil. In addition, in Example 1-9, the curing agent is added, and the heat curing treatment is also performed after the light curing treatment.

In Examples 2-1 and 2-2, the photopolymerizable group was added at an average ratio of 1 mol or less per 1 mol of the thermosoftening resin component. Since this functional group also participates in the polymerization reaction upon irradiation with ultraviolet rays, the physical properties of the foil are further improved. In Comparative Examples 2-1 and 2-2, the photopolymerizable group was added at an average ratio of more than 1 mol per 1 mol of the thermosoftening resin component. Also in these examples, the adhesive-free foil does not heat bond to the cured coating.

[0079]

EFFECTS OF THE INVENTION According to the heat-sensitive adhesive of the present invention, since no organic solvent is used for coating, the working environment is not polluted. Further, since it is an active energy ray curable type, a dry cured product can be formed in a very short time with a small amount of energy. This curing speed is determined only by the amount of energy at the time of substantially irradiating the active energy ray, so that the curing can be performed at a very high speed if an irradiation machine is appropriately selected. Therefore, it also saves energy and is very productive.

At the stage before curing, the temperature is 20
Since a low viscosity liquid of about 0 cps to a high viscosity material can be realized, a heat-sensitive adhesive film can be formed by most painting and printing methods. Therefore, by appropriately selecting the printing method, a pattern of the heat-sensitive adhesive having a very high resolution can be realized.
This liquid is 100% hardened by the active energy rays,
Since there is no evaporative component, the painted or printed material maintains its volume almost even after curing. Therefore, a cured coating or pattern having a very high volume can be obtained.

A film comprising the heat-sensitive adhesive of the present invention can be formed on the surface of a substrate, the film can be cured by irradiation with active energy rays, and then the foil can be thermally adhered to the surface of the cured film. By appropriately selecting the viscosity and thixotropy of the heat-sensitive adhesive and the printing method, it is possible to obtain a pattern with a sharp edge and a high resolution, which could not be realized by the stamping pattern by engraving up to now. Further, since the printed portion has a convex shape and the surface of the printed portion is smooth, it is possible to apply a uniform pressure with a heat roll or the like. Also, a foil pattern having a large area can be easily obtained. Further, when the foil is heat-bonded to the surface of the cured coating film made of the heat-sensitive adhesive of the present invention, since the adhesive strength of the heat-sensitive adhesive is sufficient, it is possible to use a foil which is not hot-melt processed.

Claims (14)

(57) [Claims] 1. An active energy ray-curable adhesive for heat-sensitive foil transfer, which is for curing by irradiation with active energy rays to form a solid cured product at room temperature and heat-bonding a foil to the surface of the cured product. The heat-softenable resin component 15 parts by weight to 70 parts by weight, at least one acryloyl group, at least one methacryloyl group and / or one vinyl group polymerizable monomer component 30 parts by weight to 80 parts by weight. The thermosoftening resin component contained and having a softening point of 60 ° C. or higher and 200 ° C. or lower, a thermosetting resin having a softening point of 60 ° C. or higher and 200 ° C. or lower, and 60 ° C. or higher, 200 Selected from the group consisting of synthetic rubber having a softening point of ℃ or less, 80% by weight or more of the polymerizable monomer component is occupied by the polymerizable monomer component having one polymerizable unsaturated double bond I have a heat Transfer active energy ray-curable adhesive. 2. The active energy ray-curable adhesive for heat-sensitive foil transfer according to claim 1, which contains 15 parts by weight or less of an ultraviolet polymerization initiator. 3. The heat-softenable resin component is dissolved and / or dispersed in the polymerizable monomer component.
An active energy ray-curable adhesive for transferring a heat-sensitive foil as described above. 4. A coating of the active energy ray-curable adhesive for transfer of a heat-sensitive foil according to claim 1 is formed on the surface of a substrate, the coating is cured by irradiation with active energy rays, and then the surface of the cured coating is formed. A method of transferring the foil, in which the foil is heat-bonded to the. 5. The method for transferring a foil according to claim 4, wherein the film having a film thickness of 10 μm or more and 500 μm or less is formed by screen printing. 6. The method of transferring a foil according to claim 4, wherein the coating film is formed by a potting method. 7. After the coating is cured by irradiation with active energy rays, a UV-curable ink coating for releasing is formed on a part of the surface of the cured coating for adhesion, and the coating is exposed to UV rays. The method for transferring a foil according to claim 4, wherein the foil is cured by irradiation to obtain a cured coating for release, and then the foil is thermally adhered to an exposed portion of the surface of the cured coating for adhesion. 8. An active energy ray-curable adhesive for heat-sensitive foil transfer, which cures by irradiation with active energy rays to form a solid cured product at room temperature and thermally adheres a foil to the surface of the cured product. The heat-softenable resin component 15 parts by weight to 70 parts by weight, at least one acryloyl group, at least one methacryloyl group and / or one vinyl group polymerizable monomer component 30 parts by weight to 80 parts by weight. The thermosoftening resin component contained and having a softening point of 60 ° C. or higher and 200 ° C. or lower, a thermosetting resin having a softening point of 60 ° C. or higher and 200 ° C. or lower, and 60 ° C. or higher, 200 Selected from the group consisting of synthetic rubber having a softening point of ℃ or less, and 80% by weight or more of the polymerizable monomer component is occupied by the polymerizable monomer component having one polymerizable unsaturated double bond And One said heat softenable resin component 1 molecule has an acryloyl group and / or methacryloyl groups in a ratio of average one or less, thermal foil transfer active energy ray-curable adhesive. 9. The active energy ray-curable adhesive for heat-sensitive foil transfer according to claim 8, which contains 15 parts by weight or less of an ultraviolet polymerization initiator. 10. The thermosoftening resin component is dissolved and / or dispersed in the polymerizable monomer component.
An active energy ray-curable adhesive for transferring a heat-sensitive foil as described above. 11. A coating comprising an active energy ray-curable adhesive for transfer of a heat-sensitive foil according to claim 8 is formed on the surface of a substrate, the coating is cured by irradiation with active energy rays, and then the surface of the cured coating. A method of transferring the foil, in which the foil is heat-bonded to the. 12. The method for transferring a foil according to claim 11, wherein the film having a film thickness of 10 μm or more and 500 μm or less is formed by screen printing. 13. The method for transferring a foil according to claim 11, wherein the film is formed by a potting method. 14. After curing the coating by irradiation with active energy rays, a UV-curable ink coating for releasing is formed on a part of the surface of the cured coating for adhesion, and the coating is exposed to UV rays. The method of transferring a foil according to claim 11, wherein the foil is cured by irradiation to obtain a cured coating for release, and then the foil is thermally adhered to an exposed portion of the surface of the cured coating for adhesion.