JPH0638703Y2 - Greeting card with hologram - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a greeting card with a hologram, and more particularly, to a greeting card having an excellent three-dimensional and cosmetic effect by the hologram.

(Problems to be solved by conventional techniques and devices) Holography is a new technique for recording and reproducing the state of the wavefront of light from an object, and is a hologram created by this technique (wavefront of light from an object. The material in which the state is recorded in the form of interference fringes generated by the interference of light) can reproduce a stereoscopic image and can also perform multiple recording. Further, as one method of recording a hologram, interference fringes can be recorded on the surface of the material in the form of fine irregularities, and since this hologram is easy to mass copy, it is being widely used for various purposes.

By the way, conventionally, in greeting cards such as Christmas cards, New Year's cards, hot summer greetings, various invitations, etc., these greeting cards are provided with various cosmetic devices in order to enhance their aesthetics and design value. However, there is a problem in that it is too flat, and therefore it is not possible to exhibit an excellent three-dimensional effect, designability, or high-class feeling.

(Means for Solving Problems) The inventor of the present invention has reached the present invention as a result of research to impart more excellent cosmetic and design effects to the conventional greeting card as described above.

That is, the present invention is a transparent reflection type having a hologram effect layer made of a non-metal transparent material having a different refractive index from the material of the hologram forming layer on the relief forming surface of the hologram forming layer on at least a part of the pattern surface of the greeting card. A greeting card with a hologram, wherein a hologram is provided, and the pattern can be visually observed through the hologram, and a hologram image can be observed.

In the entire specification of the present invention, "non-metal" means including a metal compound and the like, but not including a simple metal.

(Example) Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings.

The hologram used for the greeting card of the present invention may be a transparent reflection type relief hologram having a hologram forming layer having a relief surface and a hologram effect layer made of a non-metal transparent material having a different refractive index from the hologram forming layer. Good.

The greeting card with hologram 10 shown in FIGS. 1 (a) and 1 (b) has at least a part of the pattern surface 8 formed by printing the greeting card substrate 1 using the embossed hologram as schematically shown in FIG. The hologram effect layer 3 and the hologram forming layer 4 are formed on the upper surface of the adhesive layer 2 via the adhesive layer 2.
Is an example in which is laminated.

Another example of a greeting card 10 with a hologram, a part of the cross section of which is schematically illustrated in FIG. 3, is an example of the case where the hologram effect layer 3 is laminated on the surface of the hologram forming layer 4 having the minute concavo-convex shape.

In the structure of FIG. 3 described above, since minute irregularities on the surface are exposed, it is preferable to provide a protective layer on the surface in order to prevent damage to the surface.

Hereinafter, each constituent material will be described in more detail.

Greeting Card Base Material As the greeting card base material, all materials conventionally used as greeting card materials such as paper, plastic, metal and the like or composite materials thereof can be used.

Although not shown, these greeting card base materials may be subjected to various other conventional decorations.

Holograms can be provided on all or part of these greeting card substrates.

In the above, the greeting card includes the completed greeting card and each member for assembling the greeting card.

Hologram forming layer The thickness of the hologram forming layer can be appropriately selected depending on the size of the greeting card and the type of hologram,
Usually, it is preferably 0.1 to 50 μm, and more preferably 0.5 to 5 μm.

The embossed hologram is suitable for the present invention, and the resin for the embossed hologram forming layer can be thermoformed at the time of molding (reproduction) of the hologram. It must be durable enough to withstand the solvent in the adhesive. As such a resin, a so-called ultraviolet curable resin, an electron beam curable resin, a thermosetting resin, a naturally curable resin type reactive resin, or the like can be used. In particular, considering productivity, a resin that is cured by ultraviolet rays or electron beams is suitable.

Specifically, for example, methyl (meth) acrylate [note that the term (meth) acrylate is meant to include both acrylate and methacrylate. The same applies hereinafter], ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, isoamyl (meth) acrylate, cyclohexyl (meth) acrylate, 2- Ethylhexyl (meth) acrylate, ethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, hexanediol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, trimethylolpropane di (meth) acrylate, pentaerythritol Tetra (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, ethylenediglycol diglycidyl Radical polymerizability of ether di (meth) acrylate, polyethylene glycol di (meth) acrylate, propylene glycol diglycidyl ether di (meth) acrylate, polypropylene glycol diglycidyl ether di (meth) acrylate, sorbitol tetraglycidyl ether tetra (meth) acrylate, etc. Monomers having unsaturated groups can be used.

Further, as an ultraviolet ray or electron beam curable resin having thermoformability, a polymer obtained by polymerizing or copolymerizing the following compounds (1) to (8) can be radical-treated by the following methods (a) to (d). What introduced the polymeric unsaturated group is used.

(1) Monomer having hydroxyl group: N-methylol (meth) acrylamide, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate,
2-hydroxybutyl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate and the like.

(2) Monomers having a carboxyl group: (meth) acrylic acid, (meth) acryloyloxyethyl monosuccinate and the like.

(3) Epoxy group-containing monomer: glycidyl (meth)
Acrylate etc.

(4) Monomers having an aziridinyl group: 2-aziridinylethyl (meth) acrylate, allyl 2-aziridinylpropionate and the like.

(5) Amino group-containing monomer: (meth) acrylamide, diacetone (meth) acrylamide, dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate and the like.

(6) Monomers having sulfonic acid groups: 2- (meth) acrylamido-2-methylpropanesulfonic acid, etc.

(7) Monomer having isocyanate group: addition of diisocyanate such as 1 mol to 1 mol adduct of 2,4-toluene diisocyanate and 2-hydroxyethyl (meth) acrylate and radical polymerizable monomer having active hydrogen Things etc.

(8) Further, in order to control the glass transition point of the above copolymer or the physical properties of a cured film, the above compound and the following monomer copolymerizable with this compound And can be copolymerized. Examples of such a copolymerizable monomer include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate.
Acrylate, t-butyl (meth) acrylate, isoamyl (meth) acrylate, cyclohexyl (meth)
Acrylate, 2-ethylhexyl (meth) acrylate and the like can be mentioned.

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

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

(B) In the case of a polymer or copolymer of a monomer having a carboxyl group or a sulfonic acid group, the above-mentioned monomer having a hydroxyl group is subjected to a condensation reaction.

(C) 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 a monomer having a carboxyl group is subjected to an addition reaction.

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

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

Further, although the above-mentioned ones can be sufficiently cured by electron beam irradiation, when they are cured by ultraviolet ray irradiation, benzoquinone, benzoin, benzoin ethers such as benzoin methyl ether, halogenated acetophenones and the like can be used as sensitizers. It is also possible to use a material that generates radicals by irradiating ultraviolet rays.

Hologram effect layer As a material of the hologram effect layer, a non-metal transparent material that can exhibit a hologram effect and has a refractive index different from that of the hologram forming layer can be mentioned.

The refractive index of these materials may be larger or smaller than that of the hologram forming layer, but the difference in refractive index is preferably 0.1 or more, more preferably 0.5 or more. According to the experiments by the present inventors, it is optimal that the size is 1.0 or more.

By providing the non-metal transparent thin film layers having different refractive indexes as described above, the hologram effect is exhibited and the lower layer, for example, the display portion is not hidden.

The non-metal transparent material forming the hologram effect layer is one of the following materials (1) to (4).

(1) A transparent continuous thin film having a refractive index larger than that of the hologram forming layer. It shows in Table 1. In the table, n represents the refractive index (hereinafter,
The same applies to (2) to (4)).

(2) A transparent ferroelectric substance having a refractive index larger than that of the hologram forming layer. It is shown in Table 2.

(3) A transparent continuous thin film having a smaller refractive index than the hologram forming layer. It shows in Table 3.

(4) A resin having a refractive index different from that of the hologram forming layer. The refractive index may be higher or lower than that of the hologram forming layer. Examples of these are shown in Table 4.

In addition to the above, a transparent synthetic resin can be used, but a resin having a large difference in refractive index from the hologram forming layer is particularly preferable.

The thickness of the above-mentioned thin film layers (1) to (4) may be in the transparent region of the material forming the thin film, and generally 10 to 10,000
Å is preferable, and more preferably 100 to 5,000 Å.

As a method of forming the hologram effect layer on the hologram forming layer, when the hologram effect layer is made of the material of (1) to (3), a vacuum deposition method, a sputtering method, a reactive sputtering method, an ion plating method, General thin film forming means such as electroplating can be used,
Further, when the hologram effect layer is made of the material (4), a general coating method or the like can be used.

In the case of the material of the above (4), it is not limited to a thin film as long as it is a transparent material, and a resin layer having a thickness equal to or larger than the thin film may be provided in the hologram forming layer.

It should be noted that the hologram effect layer exhibits the best hologram effect when it is provided directly on the surface of the hologram forming layer.

The hologram effect layer may be provided so as to fill the relief forming surface (that is, one surface becomes a flat surface), or may be provided so as to follow the relief forming surface (that is, one surface becomes a flat surface). It becomes uneven surface).

Adhesive Layer The adhesive layer plays a role of adhering the hologram forming layer and the hologram effect layer to the greeting card base material. As the adhesive, a wide variety of known adhesives such as acrylic resins, vinyl resins, polyester resins, urethane resins, amide resins, and epoxy resins can be used. The thickness of this adhesive layer is 0.
It is preferably 1 to 50 μm, and more preferably 0.5 to 10 μm.

An anchor layer (not shown) may be provided between the hologram effect layer and the adhesive layer in order to enhance the adhesiveness between them.

Manufacturing Method Next, a method for manufacturing the greeting card with hologram according to the present invention will be described.

As a method for manufacturing the hologram 7 incorporated in the greeting card 10 as shown in FIGS. 1 to 3, any conventionally known method can be used as it is, but a preferable method is a transfer method. An example of this transfer will be described.

First, prior to manufacturing the greeting card with hologram 10 , a hologram transfer sheet as shown in FIG. 4 is produced.
Create 20 . In order to produce this hologram transfer sheet 20 , first, on the hologram transfer sheet base material 5, an ultraviolet ray or an electron beam having thermoformability is optionally provided via a release layer 6 and an overprint layer (not shown). A film for hologram formation is formed by providing a curable resin or a thermosetting resin 4 having thermoformability.

Among the above resins, an ultraviolet or electron beam curable resin that is solid at room temperature before curing and has thermoformability is particularly preferable.

Then, the obtained hologram-forming film and the hologram original plate on which minute irregularities are formed are heated and pressure-contacted so that the resin layer of the film is in contact with the hologram original plate,
While forming minute irregularities on the surface of the resin, or thereafter, irradiation with ultraviolet rays or electron beams, or heat is further applied to cure the resin.

At the time of heating and pressing the hologram original plate and the hologram forming film, a heating and pressing means such as a heating roll can be used.At this time, the temperature of the heating roll depends on the kind of resin to be used, the material of the base film, and the thickness. Generally, it is appropriate that the temperature is 100 to 200 ° C, although it varies greatly depending on the conditions. Further, it is preferable that the hologram original plate and the hologram forming film are pressed against each other under a pressure of 0.1 kg / cm ² or more, preferably 1 kg / cm ² or more.

At this time, ultraviolet rays or electron beams may be irradiated. Further, the film in which the minute irregularities of the hologram of the hologram master plate are formed may be peeled from the hologram master plate and then irradiated again, and the irradiation intensity is preferably a strength at which the resin is sufficiently cured. Irradiation with ultraviolet rays or electron beams needs to be appropriately determined according to the resin used.

Next, the hologram effect layer 3 is applied. The hologram effect layer 3 can be provided on the hologram forming layer 4 by a sputtering method, an ion plating method, a vacuum vapor deposition method, or another method.

Next, an anchor layer (not shown) is provided on the hologram effect layer 3 if necessary, and then the adhesive layer 2 is provided by a coating method or the like to obtain the hologram transfer sheet 20 .

Incidentally, the conventionally used types of ultraviolet curable resins and electron beam curable resins are generally in a liquid state, and thus are extremely sticky when applied to a base film, and therefore, conventional ultraviolet rays or The hologram forming film coated with the electron beam curable resin cannot be rolled up and stored, and the ultraviolet curable resin is coated on the substrate film each time immediately before contact with the hologram master plate for hologram formation. There was a problem that the film had to be formed, but since the hologram forming film as described above is made of a specific resin, it can be wound and stored without stickiness. It has the advantage.

Then a hologram transfer sheet 20 and the substrate 1 having such a structure described above, when heating contact in the manner in contact and the adhesive layer 2 and the pattern 8 surface of the substrate 1 of the hologram transfer sheet, the hologram transfer sheet 20 The hologram forming layer 4 and the hologram effect layer 3 are transferred onto the surface 8 of the pattern of the base material 1 to obtain the greeting card 10 with hologram according to the present invention.

It is preferable that the hologram transfer sheet 20 and the substrate 1 are heated and pressed at a temperature of 100 to 200 ° C. under a pressure of 5 to 50 Kg / cm ² .

Further, as another method, a protective film is adhered to the upper and lower sides of a hologram sheet having a hologram effect layer provided with a hologram effect layer by a method such as heat fusion, and the hologram sheet with the protective film is attached to the patterned surface of the greeting card substrate. It may be a method of coating.

(Effect of Device) Since the greeting card according to the present invention is provided with the hologram of the specific configuration on the surface thereof, the following effects can be obtained.

(A) The greeting card has a three-dimensional appearance, which further improves the aesthetics, the decorativeness, and the sense of quality.

(B) Since the hologram forming layer having excellent heat resistance is provided, it is possible to adhere the hologram by applying heat when attaching the hologram.

(C) Since the hologram forming layer having excellent weather resistance is provided, the effect is not lost even under severe conditions such as handling mail.

(D) In the hologram greeting card of the present invention, the hologram image is directed to the incident light side by the reflection on the transparent hologram effect layer and the diffraction on the relief surface with respect to the light incident on the greeting card at a predetermined incident angle. In addition to being able to be three-dimensionally expressed, the incident light can be transmitted with respect to the light incident at an angle different from the incident angle, and the patterned surface of the greeting card can be clearly observed.

As a result, when you look at a greeting card at a certain angle, it looks like a normal greeting card, but if you unconsciously change the angle, a three-dimensional hologram image suddenly appears from nothing. , It is possible to develop a design that is amazing for those who see the greeting card.

[Brief description of drawings]

FIG. 1 is a perspective view of a hologram greeting card according to the present invention, FIGS. 2 to 3 are sectional views of the hologram, and FIG. 4 is a hologram used in manufacturing a hologram greeting card. It is a sectional view of a transfer sheet. 1 ... Base material 2 ... Adhesive layer 3 ... Hologram effect layer 4 ... Hologram forming layer 5 ... Hologram transfer sheet base material 6 ... Release layer 7 ... Hologram 8 ... Pattern 10 ... Greeting with hologram Card 20: Hologram transfer sheet

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-61-9681 (JP, A) JP-A-60-169887 (JP, A) Actually open Sho-50-36431 (JP, U) Actual-open Sho-59- 131900 (JP, U) Actually open Sho 61-8170 (JP, U)

Claims (3)

[Scope of utility model registration request] 1. A transparent reflection hologram having a hologram effect layer made of a non-metal transparent material having a different refractive index from the material of the hologram forming layer on the relief forming surface of the hologram forming layer on at least a part of the pattern surface of the greeting card. A greeting card with a hologram, in which the above pattern is provided through the hologram and the hologram image can be observed. 2. The utility model registration claim as set forth in claim (1), wherein the hologram forming layer is formed by using a thermosetting ultraviolet curable resin, electron beam curable resin or thermosetting resin. Greeting card with hologram. 3. A utility model registration claim wherein the thermosetting UV-curable resin, electron beam curable resin or thermosetting resin is solid at room temperature before curing and has thermoformability. The greeting card with a hologram according to item (2).