JPS61238079A - Colored hologram sheet - Google Patents

Abstract

PURPOSE:To obtain a hologram sheet colored in accordance with kinds of uses by forming fine undulations in accordance with the hologram on a synthetic resin layer colored with a dye or pigment and laminating a light-reflective thin metallic film on the whole face including the roughness. CONSTITUTION:A base material 2 of a polyester film is coated with the synthetic resin layer 4 colored with a dye or pigment in advance. The face of the layer 4 is pressed to the metallic mold on which the fine undulations 3 have been recorded as the master hologram plate and hardened by irradiating it with electron beams or the like, and Al is vapor deposited to the hardened resin layer 4 to form a light-reflective thin metallic layer 5, thus permitting mass production of the duplicates to be made by embossing, and the hologram sheets 1 having appearances and colors suitable in accordance with kinds of uses, such as cards and calenders to be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a colored hologram sheet that is colored in any color and has an appearance suited to the intended use.

[Conventional technology]

Holograms can reproduce three-dimensional images using light interference, and because they require advanced technology to manufacture, they are often placed on some credit cards as a means of preventing counterfeiting, and are often used to create a novel appearance. Attempts have been made to include them on the covers of magazines and books, pamphlets, calendars, record jackets, paper and plastic packages, clothing, etc.

In many cases, a hologram is made of a colorless and transparent synthetic resin with fine irregularities formed by embossing and a metal thin film layer as a light reflection layer, but in such holograms, the color of the entire hologram is metallic The color is determined by the thin film layer, and because aluminum is usually used, the color is limited to silver-gray, so depending on the location where it is used, the color often does not match the surroundings.

Therefore, in an attempt to colorize holograms, attempts were made to form rainbow holograms or color holograms.

However, when the former rainbow hologram is reproduced using white light, the imaging position (imaging angle) is different for each wavelength component of the reproduced light, so that each color image looks clear depending on the viewing position. However, when using a reflective type, it is unavoidable that the background color is silver-gray due to aluminum etc., and the latter color hologram requires the use of three types of light sources with different wavelengths during production. By performing multiplex recording and reproducing with three types of light sources, the desired color tone is obtained by mixing each color.
, a green light source (e.g. Ar laser, wavelength 5145A) and a blue light source (e.g. Ar laser, wavelength 48BOA)
These three types are required, and it is complicated both in terms of production and reproduction, so there is a problem in mass producing it for general use. Furthermore, according to three-dimensional volume holography, it is possible to obtain natural-colored white light reproduction type holograms by utilizing the wavelength selectivity during reproduction, but this type of hologram cannot be mass-reproduced using an embossed type. Because there is no such thing, there is a problem in dissemination.

[Problem that the invention seeks to solve]

Therefore, in the present invention, it is possible to make large-scale reproductions using the embossed type, and it has an appropriate color tone depending on the use.
The purpose is to provide a colored hologram sheet that matches the color tone of the surrounding area of the area in which it is used.

[Means for Solving the Problems] In the present invention, a colored synthetic resin layer colored in advance with a dye or pigment is laminated on an r base film, and a hologram minute uneven shape is formed on the colored synthetic resin layer. is formed,
The gist of the invention is "a colored hologram sheet" further comprising a light-reflecting metal thin film layer laminated on the surface on which the hologram's microscopic irregularities are formed.

FIG. 1 is a cross-sectional view showing an embodiment of the present invention, in which a colored hologram sheet 1 has a colored synthetic resin layer 14 on a base film 2 on which a hologram minute unevenness shape 3 is formed. A light-reflecting metal thin film @5 is laminated on the surface where the micro-asperities 3 are formed.

In principle, any film-like material can be used as the base film 2. Specifically, polyethylene,
Polymer films such as polypropylene, polyethylene terephthalate, polyvinyl chloride, polyvinylidene chloride, polyimide, polymethyl methacrylate, polystyrene, polyvinyl butyral, and polycarbonate, paper, synthetic paper, and metal films such as aluminum and iron are used. Moreover, a laminate of these can also be used. The thickness of this base film is 5 to 2.000 μm, preferably 10 μm.
It is preferable that it is 500 micrometers.

The base film 2 may be omitted when the colored synthetic resin layer 4 described later has strength by itself.

Furthermore, when using a metal foil such as aluminum or iron, it is also possible to use it without providing the metal thin film layer 5, which will be described later. If it is provided, it is not necessary to provide a metal thin film layer on the surface on which the minute unevenness shape 3 is formed.

The colored synthetic resin layer 4 is made of a synthetic resin that has been colored in advance with a dye or pigment.

Colored synthetic resin layer C: Various types of dyes can be used, such as the following.

Direct dyes, acid dyes, basic dyes, mordant dyes, vat dyes, sulfur dyes, soluble vat dyes, azoic dyes, reactive dyes, cationic dyes, disperse dyes, oxidation dyes, metal complex dyes, etc.

When observing the dye as a reflection type hologram, the light enters the colored synthetic resin layer 14, is reflected by the metal film part, and is emitted again. Since light will pass through the resin 1 twice, it is desirable that the light transmittance of the colored synthetic resin layer 14 is not significantly reduced and that it does not cloud the lI4.

Since the light transmittance varies depending on the thickness of @4, it is preferable that the white light transmittance of @4 is 50% or more, and the haze value measured by a haze meter is preferably 10% or less. If the white light transmittance is less than 50%, the hologram will not look clear and the three-dimensional effect will be poor, and if the haze value measured by the haze meter exceeds 10%, a milky white cloud will appear in the background of the hologram, which will also affect the clarity of the hologram. is lost, and the three-dimensional effect becomes poor.

In addition, the properties required of the dye include the material of the colored synthetic resin layer 14, the method of forming @4, and the durability during processing performed on l1i4. For example 11
When 4 is formed using an ultraviolet curable resin, a considerable amount of ultraviolet rays are irradiated after the hologram is formed into a microscopic uneven shape, so it is preferable to use a material that does not change color or fade when exposed to ultraviolet rays, and an electron beam curable resin is used. When forming 114, it is preferable to use a dye that is less likely to fade or change color when irradiated with an electron beam.

Further, depending on the use of the colored hologram sheet, for example, if it is to be applied to cards or the like, it is preferable to use a dye that takes into consideration physical properties such as chemical resistance, solvent resistance, plasticizer resistance, and washing fastness.

Taking into account various practical conditions such as those mentioned above, dyes in the form of oil-soluble metal complexes are preferred, for example,
Examples include type 1-2 azo metal complex dyes, type 1-1 azo metal complex dyes, metal phthalocyanine dyes, and organic base salts of these dyes, and more specifically, the following. .

Paris First Yellowna 3104 and Su5105 (
Zapon Fast Yellow GR (manufactured by BASIF), Eisen Metalon Yellow GRH and GRH Special (all manufactured by Hodogaya Chemical Co., Ltd.), Eisen Metalon Yellow HNR8 (manufactured by Hodogaya Chemical Co., Ltd.) , Orazole Yellow I GIlly (manufactured by Bageigy), Paris First Orencina 3206
(manufactured by Orient Chemical Industry Co., Ltd.), Zapon First Orange 12! i, G and RR (all manufactured by EASIF)
, Eisen Subiron Orange GRH and 2RH (manufactured by Hodogaya Chemical Co., Ltd.), Paris Fast Redna 3304 and Su 3305 (manufactured by Orient Chemical Industry Co., Ltd.), Neopret Bon $ G F! and Pomelo First Trenet GE (
Both manufactured by BASF) 41 Eisen Subiron Red B
za, GKH and GKH Special (manufactured by Hodogaya Chemical Co., Ltd.), Orazol Red L BII (manufactured by Tepa Geigy Co., Ltd.)
, Eisens Viron Violet RH (manufactured by Hodogaya Chemical Co., Ltd.), Zapon Fast Blue HFL and Zapon First Brown BE (both manufactured by BASF), and the like.

Furthermore, pigments used in the colored synthetic resin layer are broadly classified into organic pigments and inorganic pigments. Organic pigments include: - Neutral pigments, such as nitro pigments, azo pigments, anthraquinone pigments, butalocyanine pigments, azine pigments, etc., and Cationic pigments, such as triphenylmethane pigments.
There are quinanthene pigments, ■anion type, such as azo pigments, triphenylmethane pigments, etc.
Those belonging to the category of inorganic pigments include cobalt pigments, iron pigments, chromium pigments, manganese pigments, copper pigments, vanadium pigments, mercury pigments, lead pigments, sulfide pigments, selenide pigments, and the like.

As with dyes, the above pigments also have properties such as light transmittance, haze value, fading when exposed to ultraviolet rays or electron beams or when heated, chemical resistance, plasticizer resistance, and washing fastness. Need to pay attention.

In particular, when using pigments, transparency tends to be a problem, and it is necessary to consider the particle size of the pigment, wetting with the surrounding synthetic resin, and dispersion C. If the particle size is too large, it becomes transparent. 1, and poor wetting/dispersion causes cloudiness. In this sense, the particle size of the pigment is very small, preferably less than % of the wavelength of light, and the pigment is mixed into a synthetic resin at a high concentration by coprecipitation, rolling, extruding, etc. However, it is preferable to use a master patch, master pellet, etc. that have been wetted and dispersed as described above. Examples of pigments with improved wetting and dispersion include:
For example, Taisei Kako Co., Ltd.'s Cicotrans Yellow (Bi12
Microparticle iron oxide (major axis 0.06 μm, short axis 0.02 μm
m) (nitrified cotton chipped pigment) and HF Chip 4B (nitrified cotton chipped pigment of insoluble azo dye) manufactured by Taisei Kako Co., Ltd.

Various synthetic resins can be used as the synthetic resin colored with the above-mentioned dye or pigment, and any synthetic resin can be used as long as it can provide a hologram with minute irregularities.

Examples of synthetic resins include thermoplastic synthetic resins, such as polyvinyl chloride, acrylics (polymethyl methacrylate, etc.)
, polycarbonate, or polystyrene, or thermosetting synthetic resins such as unsaturated polyester, melamine, epoxy, polyester (meth)acrylate, urethane (meth)acrylate, epoxy (meth)acrylate, polyether (meth)acrylate, polyol Examples include (meth)acrylate, melamine (meth)acrylate, and triazine (meth)acrylate. Alternatively, the above thermoplastic synthetic resin and thermosetting synthetic resin may be used in combination.

In addition, synthetic resins that can be molded into holograms with minute irregularities by heat pressing, and that harden to provide sufficient durability after molding, are preferred, such as so-called ultraviolet curing resins, electron beam curing resins, and heat-curing resins. Curing or naturally curing reactive resins may be used.

In the present invention, resins that have a slow curing time and that are cured by ultraviolet rays or electron beams are suitable.

Specifically, for example, methyl methacrylate, methyl acrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate,
Butyl acrylate, butyl methacrylate, inbutyl acrylate, inbutyl methacrylate, t-butyl acrylate, t-butyl methacrylate, inamyl acrylate, inamyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate,
2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, ethylene glycol diacrylate,
Ethylene glycol dimethacrylate, polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, hexanediol diacrylate, hexanediol diacrylate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, trimethylolpropane diacrylate, trimethylolpropane dimethacrylate, penta Erythritol tetraacrylate, pentaerythritol tetramethacrylate, pentaerythritol triacrylate, pentaerythritol trimethacrylate, dipentaerythritol hexaacrylate, dipentaerythritol hexaacrylate, ethylene glycol diglycidyl ether diacrylate, ethylene glycol diglycidyl ether dimethacrylate , polyethylene glycol diglycidyl ether diacrylate, polyethylene glycol diglycidyl ether diacrylate), 7' lobylene glycol diglycidyl ether diacrylate, propylene glycol diglycidyl ether dimethacrylate, polypropylene glycol diglycidyl ether diacrylate , polypropylene glycol diglydyl ether dimethacrylate, nrubitol tetraglydyl ether tetraacrylate,
A monomer having a radically polymerizable unsaturated group such as sorbitol tetraglycidyl tetyl tetramethacrylate is used.

Furthermore, as an ultraviolet or electron beam curing resin having thermoformability, a radically unsaturated group was introduced into a polymer obtained by polymerizing or copolymerizing the following compounds 1 to 2 by the method described below. things are used.

■ Monomers with hydroxyl groups: N-methylol acrylamide, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate,
2-hydroxybutyl acrylate, 2-hydroxybutyl methacrylate, 2-hydroxy-3-phenoxypropyl methacrylate, 2-hydroquine-3-phenoxypropyl acrylate, etc.

■ Monomers containing carboxyl groups such as nialic acid, methacrylic acid, acryloyloxyethyl mononaccinate, etc.

■ Monomers such as nigericidyl methacrylate having epoxy groups.

■ Monomers having an aziridinyl group = 2-aziridinylethyl methacrylate, allyl 2-aziridinylprobionic acid, etc. ■ Monomers having an amino group Niacrylamide, methacrylamide, diaseptone acrylamide, dimethylaminoethyl methacrylate , diethylaminoethyl methacrylate, etc.

(2) Monomer having a sulfone group = 2-acrylamide 2-methylpropanesulfonic acid, etc.

(2) Monomer having an isocyanate group = an adduct of a diisocyanate and a radially polymerizable monomer having active hydrogen, such as a 1 mol to 1 mol adduct of 2.4-toluene diisocyanate and 2-hydroxyethyl acrylate.

■ Furthermore, in order to adjust the glass transition point of the above copolymer and the physical properties of the cured film, the above compound and the following monomers that can be copolymerized with this compound are combined. Can be copolymerized. Examples of such copolymerizable monomers include methyl methacrylate, methyl acrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, butyl acrylate, butyl methacrylate, inbutyl acrylate, inbutyl methacrylate, t-
Examples include butyl acrylate, t-butyl methacrylate, inamyl acrylate, inamyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, and the like.

Next, the polymer obtained as described above is reacted by the following methods (a) to (b) to introduce a radically polymerizable unsaturated group, thereby obtaining an ultraviolet ray or electron beam curable resin.

(a) In the case of a polymer or copolymer of a monomer having a hydroxyl group, a monomer having a carboxyl group such as acrylic acid or methacrylic acid is subjected to a condensation reaction.

('a) In the case of a polymer or copolymer of a monomer having a carboxyl group or a sulfone group, the aforementioned monomers having a hydroxyl group are subjected to a condensation reaction.

-) In the case of a polymer or copolymer of a monomer having an epoxy group, an isocyanate group, or an aziridinyl group, the above-mentioned monomer having a hydroxyl group or monomer having a carboxyl group is subjected to an addition reaction.

(b) In the case of a polymer or copolymer of monomers having a hydroxyl group or a carboxyl group, a monomer having an epoxy group or a monomer having an aziridinyl group or a diisocyanate compound and a hydroxyl group-containing acrylic ester monomer The addition reaction may be carried out using a 1:1 mole adduct.

Furthermore, the above-mentioned monomer and the above-mentioned thermoformable ultraviolet ray or electron beam curable resin can be mixed and used.

In addition, the above-mentioned materials can be sufficiently cured by electron beams, but when curing by ultraviolet irradiation, C2 uses benzoquinone, benzoin, benzoin methyl ether, etc. as a sensitizer.
It is also possible to use benzoin ethers such as, helogenated acetophenones, etc., which generate radicals when irradiated with ultraviolet rays.

The thickness of the above-mentioned colored synthetic resin is 0.1 to 100 μm, preferably 0.5 to 10 μm.

On the upper surface of the colored synthetic resin layer 4, that is, the surface on which the base film 2 is not attached, a hologram minute unevenness shape 3 is formed. This concavo-convex shape 6 is used to reproduce the hologram using reproduction light, and in reality, the pitch is from f-0,1 to
The height difference between the unevenness is 0.01 to 1 μm. As will be described later, the uneven shape 3 is an inverse shape of the fine unevenness on the mold surface of the hologram master created in advance, and is formed by hot pressing or the like.

A light-reflective metal thin film layer 5 is laminated on the surface on which the micro-asperities 3 are formed. The light-reflective metal thin film layer 5 imparts light-reflectivity to the colored synthetic resin layer 4.
, Ti, Fe, Co, N1, Ou.

Ag, IAu, Ge, Al, Mg, Sb, Pb
, P(1, Oa, Bi, an, In.

Engineering n1. Metals such as Ga and Rh and their oxides,
It is formed using nitrides or the like alone or in combination of two or more. Among these metals, A1, Or, Ni, Ag,
Au and the like are particularly preferred.

In order to form such a light-reflective metal thin film layer 5 on the colored synthetic resin layer, the above-mentioned metals or alloys are prepared, and then sputtered, vacuum evaporated, ion blasted, or electrically coated. The film may be formed by a conventionally known method such as a plating method. The film layer of this reflective metal thin film layer is preferably .

The colored hologram sheet of the present invention basically has the above structure, but if necessary, the base film 2
It may have an anchor II6 between the and the colored synthetic resin @4, it may have a protection I17 that protects the light reflective metal thin film II5, or it may have a protection I17 between the base film and the colored synthetic resin @4. The surface on which the synthetic resin 1 is not provided may have protection @ 8 which has better physical and/or chemical durability than the base film.

For example, the anchor II 6 serves to enhance the adhesiveness between the base/material film 2 and the colored synthetic resin.

As the anchor@6, a wide variety of conventional anchors such as vinyl chloride-vinyl acetate copolymers, acrylic resins, urethane resins, epoxy resins, and polyester resins can be used.

The thickness of this anchor 1 is preferably 0.02 to 10 μm, preferably 0.2 to 2 μm.

Next, a method for manufacturing a colored hologram sheet of the present invention will be explained.

First, place an anchor @ 6 on the base film 2 as necessary.
Multiply the carbonated synthetic resin @ 4 through . For this purpose, it is preferable to prepare a coating composition or a composition by mixing the above-mentioned dye or pigment and synthetic resin in a solvent or in a heated and molten state, and apply the composition by an appropriate method.

Next, a hologram master plate is brought into pressure contact with the surface of the colored synthetic resin layer 14 on the base film, and a minute unevenness shape is formed on the mold surface of the hologram master plate.

At this time, when the synthetic resin constituting the colored synthetic resin layer is thermoplastic, it may be shaped by, for example, a hot press method, and then gradually cooled and the hologram master plate removed.

Alternatively, when the synthetic resin constituting the discolored synthetic resin layer is an ultraviolet curing resin or an electron beam curing resin, the synthetic resin is cured by irradiating ultraviolet rays or electron beams after the hologram master is pressed. .

However, when using ultraviolet curable resins or electron beam curable resins as described above, the conventional types of ultraviolet curable resins and electron beam curable resins are generally in a liquid state, so they cannot be coated onto the base film. When applied, it becomes extremely sticky, and therefore, hologram-forming films made by applying conventional ultraviolet or electron beam curing resin onto a base film cannot be rolled up and stored; A hologram-forming film must be created by applying an ultraviolet curing resin onto the film one by one.

Therefore, in the present invention, although the fine unevenness shape of the hologram can be created by the above-mentioned method, it is most preferable to create it by the following method.

That is, a hologram-forming film in which a colored thermoformable ultraviolet curable resin, a colored electron beam curable resin, or a colored thermosetting resin is provided on a base film, if necessary, via a single layer of anchors. and a hologram master plate on which interference fringes corresponding to the wavefront of light from an object are formed in an uneven pattern are placed in such a way that the colored ultraviolet curing resin or colored electron beam curing resin of the film is in contact with the hologram master plate. The hologram forming film is irradiated with ultraviolet rays or electron beams or heat is applied to cure the resin while the original plate and the film are in close contact with each other. A colored synthetic resin layer 4 on which the fine unevenness 3 of the hologram layer is formed is created.

According to this method, since the colored synthetic resin layer is cured after the hologram is formed, there is no need to heat and cool the hologram master and the hologram forming film multiple times. Deterioration can be reduced. In addition, the hologram original plate and the hologram forming film are maintained in a heated state and pressed against each other to form irregularities on the film, and then the pressed state can be immediately released, so that a cooling step is not necessarily required.

Furthermore, the hologram-forming film can be rolled up and stored, thus simplifying the hologram duplication process and enabling mass production.

When heat-pressing the hologram original plate and the hologram-forming film, a heat-pressing means such as a heating roll can be used, and the temperature of the heating roll depends on the type of resin to be used, the material of the base film, and the thickness. The temperature varies greatly depending on the temperature, etc., but in general, a temperature of 100 to 200°C is appropriate. Further, it is preferable that the hologram original plate and the hologram forming film are pressed together under a pressure of 0.1 KP/cd5U or more, preferably I1176M1 or less.

At this time, when irradiating ultraviolet rays or electron beams, the irradiation intensity may be determined by peeling off the film with the hologram unevenness of the hologram original plate from the plate and then irradiating it again, so that the resin cannot be sufficiently cured. preferable. It is necessary to adjust the amount of irradiation of ultraviolet rays and electron beams as appropriate depending on the resin used.

In addition, when forming a hologram using a colored thermoformable ultraviolet or electron beam curing resin, the unevenness of the hologram is molded under heat and pressure in the same way as when using conventional general thermoplastic resin. After cooling in a dry state, the film may be peeled off to duplicate the hologram, and then ultraviolet rays or electron beams may be irradiated to harden the resin.

Next, a reflective metal film layer is deposited. As described above, this reflective metal thin film layer can be provided on the hologram by the ion blating method, the vacuum evaporation method, or the like.

The colored hologram sheet of the present invention has the following effects because the synthetic resin layer on which the hologram minute irregularities are formed has been colored in advance.

(1) The hologram sheet can be made into any color tone, and can be made in a harmonious color tone that matches the color tone of the surroundings in which the hologram sheet is used.

(2) The production itself can be carried out efficiently and in large quantities using existing coating equipment, molding equipment, and curing equipment (ultraviolet ray or electron beam irradiation equipment, or heating equipment).

(3) By pasting the colored hologram sheet of the present invention on ID cards, cash vouchers, etc., counterfeiting can be made technically difficult, and the color tone of the colored hologram sheet and the base material of cards, cash vouchers, etc. By matching the color tone of the colored hologram sheet, the attachment position of the colored hologram sheet is unclear,
Furthermore, even if the image of a laser-reproduced hologram such as a Funnel hologram recorded in a colored hologram sheet remains as recording noise and hints at its recording position,
Coloring can make the recording position unclear and increase the anti-counterfeiting effect.

EXAMPLES The present invention will be explained below with reference to Examples, but the present invention is not limited to these Examples.

Example 1 A curable acrylic resin (
Souken Kagaku Co., Ltd., Narmolac 5T104) with a thickness of 0.5 μm
, and further on top of this, as a colored synthetic resin layer, 3 parts of a metal-containing red dye (manufactured by Ciba Geigy, CO complex salt-based metal-containing azo dye, Orazole Red G) is added to 100 parts by weight of trimethylolpropane triacrylate. A hologram-forming film was prepared by dissolving the parts and applying the solution to a thickness of 2 μm.

Next, the resin surface of this hologram forming film is used as a hologram original plate, and a mold in which a hologram is recorded in a concave and convex shape is pressed and brought into close contact with the resin surface, and in this state, it is exposed to an electron beam with an intensity of 175 KV and 10 Mrad from the film surface. 5m
The hologram-forming resin was cured by irradiating the electron beam at a speed of /min.

Next, the above film on which the hologram was formed was peeled off from the hologram master plate, and aluminum was vacuum-deposited to a thickness of 80 OA on the uneven surface to create a red colored hologram sheet.

Example 2 The same procedure as described in Example 1 was used, except that 4% of Irgacure 184 (manufactured by Ciba Geigy) was added as a sensitizer to 100 parts of trimethylolpropane triacrylate as the hologram-forming resin. A hologram-forming film was produced in the same manner as in the method described above, and adhered to the hologram master under pressure. Next, from the film side, 80W/c1n
The hologram-forming resin was cured by irradiating ultraviolet light through a 10c1n position under a mercury lamp at a speed of 2 rn/m.

Further, aluminum was vacuum-deposited by the same method as that shown in Example 1 to obtain a colored hologram original plate.

Example 3 The following composition was refluxed for 6 hours to perform copolymerization.

Methyl methacrylate 284 parts by weight 2-Hydroxyethyl 130 parts Methacrylate Ethyl acetate 1.100 parts by weight α,α'-Azobis 2 parts by weight Inbutyronitrile Next, 0.1 part by weight of Paramethacrylate was added to the resulting reaction product. After adding quinphenol to stop the reaction, 100 parts by weight of a 1 mol to 1 mol adduct of 2-hydroxyethyl acrylate and 2.4-)luene diisonanate was added, and further 5 parts by weight of dibutyltinsilaurylate were added. In addition, the reaction was carried out at 80° C. for 5 hours while blowing dry air.

After cooling the reaction solution to room temperature, 15 parts by weight of an ultraviolet sensitizer (Irgacure 184 manufactured by Ciba Geigi Co., Ltd.) was added and dissolved uniformly, and yellow master paste (transparent iron oxide master paste, manufactured by Taisei Kako Co., Ltd.) was added. 3 parts by weight of Nocotrans Yellow) was uniformly dissolved to obtain a yellow ultraviolet curable coating material.

As in Example 1, a single layer of anchors with a thickness of 50 μm was provided on a polyethylene terephthalate film, and then the material obtained above was applied uniformly to a thickness of 2.5 μm in a dry state to obtain a hologram forming film. And so. This coated film does not stick at room temperature and can be stored in a rolled state.

Next, the resin surface of this coated film and the uneven surface of the mold on which the hologram is recorded in an uneven shape are superimposed 150
The mold and the coated film were brought into close contact by heating and pressing using nip rolls at a pressure of 20 TP/cd.

Next, with these in close contact, apply 80 w/w from the film side.
, 1 door/- below 10 strokes of an ultraviolet lamp with an output of
The coated resin was cured by irradiating ultraviolet light at a speed of . Thereafter, the film was peeled off from the mold. Next, a colored hologram sheet was produced in the same manner as in Example 1.

By using this method, colored hologram sheets could be produced very efficiently.

[Brief explanation of drawings]

Both FIG. 1 and FIG. 2 are cross-sectional views showing the colored hologram sheet of the present invention.

Claims (1)

[Claims] (1) A colored synthetic resin layer colored with a dye or pigment in advance is laminated on a base film, and a hologram minute uneven shape is formed on the colored synthetic resin layer. A colored hologram sheet characterized in that a light-reflecting metal thin film layer is laminated on a surface having an uneven shape.