JPH0740504Y2 - Adhesive tape with hologram pattern - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an adhesive tape having a hologram pattern.

[Conventional technology]

An adhesive tape provided with an adhesive layer on one surface of a base material such as cellophane is widely used for various purposes such as adhering an end portion of a packaging paper or the like for packaging a product, and particularly for packaging or the like. Colored adhesive tapes and decorative adhesive tapes provided with letters, patterns, etc. are used.

[Problems to be solved by the device]

However, since the conventional adhesive tape for decoration of this kind is simply provided with characters and patterns by printing or the like, in recent years, in particular, a wide variety of decorative adhesive tapes have been widely used. However, there is a problem in that only the provision of the mark does not cause much change, the decorativeness is not always sufficient, and the advertising effect due to characters and the like is insufficient.

[Means for Solving the Problems]

The present invention has been made in view of the above points, and an object of the present invention is to provide an adhesive tape having a holographic pattern that has excellent designability as compared with conventional decorative adhesive tapes and also has an excellent advertising effect. And

The adhesive tape having a hologram pattern of the present invention comprises a reflection hologram forming layer provided with a relief corresponding to interference fringes of a hologram on the surface of a resin layer, and a transparent thin film provided following the relief surface of the resin layer, A pressure-sensitive adhesive tape having a hologram pattern comprising a laminate provided on one side of a tape-shaped film substrate and an adhesive layer provided on one side of the laminate, wherein the transparent thin film has a refractive index of a resin layer. It is composed of different transparent inorganic compounds or resins.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. In the adhesive tape having a hologram pattern of the present invention, for example, as shown in FIG. 1, a relief corresponding to the interference fringes of the hologram is provided on the surface of the resin layer 2, and the resin layer 2 having the hologram is formed.
A transparent thin film 5 made of a transparent material having a refractive index different from that of the resin layer 2 is provided on the relief surface to form a reflective hologram forming layer 3, and the tape-shaped film substrate 1 is formed on the non-relief forming surface of the reflective hologram forming layer 3. And a pressure-sensitive adhesive layer 4 provided on the relief forming surface of the reflection hologram forming layer 3 of the laminate.

The pressure-sensitive adhesive layer 4 may be provided on the tape-shaped film substrate 1 side of the laminate. For example, FIG. 2 shows another embodiment of the adhesive tape having a hologram pattern of the present invention, in which the resin layer 2 on which reliefs corresponding to interference fringes of hologram are recorded.
The reflection type hologram forming layer 3 having a thin film 5 (transparent thin film) made of a transparent material having a different refractive index from the resin layer 2 on the relief surface of is laminated on the tape-shaped film substrate 1 to form a laminated tape. The adhesive layer 4 is provided on the side of the film substrate 1. The transparent thin film 5 is provided so as to follow the relief surface of the resin layer, and constitutes the reflective hologram forming layer 3.

The film substrate 1 is durable, has little change in physical properties and the like over a long period of time, has little thickness unevenness, has tension, and when rolled into a roll, the roll loses its shape due to slipping out. Instead, a synthetic resin film is used as a material having transparency. Specific materials for the film substrate 1 include cellophane, vinyl chloride, polyethylene,
Examples thereof include polyester, Teflon, acetate, polyimide, cellulose acetate, stretched polypropylene and the like.

If necessary, the film base material 1 is coated with an undercoating agent to enhance the adhesiveness with the pressure-sensitive adhesive layer 4 or a back surface treatment agent to facilitate pulling out of the pressure-sensitive adhesive tape wound in a roll shape. be able to. As the undercoat, natural rubber and casein, polyvinyl alcohol and its derivatives, polyacrylamide, vinyl methyl ether-maleic anhydride copolymer, Kent resin, phenol resin, etc. are compatible with both the film substrate 1 and the adhesive layer 4. The one having is used.

The reflection hologram forming layer 3 can be composed of the resin layer 2 and the transparent thin film 5 as shown in FIGS. 1 and 2, but the resin layer 2 has a single structure or a multi-layer structure (for example, on a base film). The resin layer on which the hologram is formed, or the resin layer on which the hologram is formed itself has a laminated structure). As the hologram of the reflective hologram forming layer 3, a laser reproduction hologram such as a Fresnel hologram or an image hologram, or a white light reproduction hologram such as a rainbow hologram can be used, and further, a color hologram, a computer hologram, a hologram display, a multi-hologram using these principles. Plex holograms, holographic stereograms, holographic diffraction gratings, etc. can be used.

Examples of hologram forming photosensitive materials for recording interference fringes include silver salts, deuterated gelatin, thermoplastics, diazo photosensitive materials, photoresists, strong derivatives, photochromic materials, thermochromic materials, chalcogen glass, etc. Can be used.

As the material of the resin layer 2 forming the hologram, thermoplastic resin such as polyvinyl chloride, acrylic (eg MMA), polystyrene and polycarbonate, unsaturated polyester, melamine, epoxy, polyester (meth) acrylate, urethane (meth) acrylate Cured with a thermosetting resin such as epoxy resin, epoxy (meth) acrylate, polyether (meth) acrylate, polyol (meth) acrylate, melamine (meth) acrylate, and triazine acrylate, or thermosetting with the above thermoplastic resin A mixture of resins and the like can be used.

Further, as the material of the resin layer 2, a thermoformable substance having a radically polymerizable unsaturated group can be used, and there are the following two types.

(1) Those having a radically polymerizable unsaturated group in a polymer having a glass transition point of 0 to 250 ° C. More specifically, a polymer obtained by polymerizing or copolymerizing the following compounds (1) to (4) with a radically polymerizable unsaturated group introduced by methods (I) to (D) described below can be used.

Monomers having 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 acrylate, 2-hydroxy-3-phenoxypropyl methacrylate and the like.

Monomers having a carboxyl group: acrylic acid, methacrylic acid, acryloyloxyethyl monosuccinate, etc.

Monomers having epoxy groups: glycidyl methacrylate and the like.

Monomers having an aziridinyl group: 2-aziridinyl ethyl methacrylate, allyl 2-aziridinyl propionate, etc.

Monomers having amino groups: acrylamide, methacrylamide, diacetone acrylamide, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate and the like.

Monomer having sulfone group: 2-acrylamide-2
-Methyl propane sulfonic acid etc.

Monomer having isocyanate group: 1 of 2,4-toluene diisocyanate and 2-hydroxyethyl acrylate
An addition product of a radical-polymerizable monomer having a diisocyanate such as an addition product of 1 to 1 mol and active hydrogen.

Further, in order to control the glass transition point of the above copolymer or to control the physical properties of the cured film, the above compound and a copolymerizable monomer such as You can also let it. Such copolymerizable monomers include, for example, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate,
Butyl acrylate, butyl methacrylate, isobutyl acrylate, isobutyl methacrylate, t-butyl acrylate, t-butyl methacrylate, isoamyl acrylate, isoamyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate,
2-ethylhexyl acrylate, 2-ethylhexyl methacrylate and the like can be mentioned.

The radical-polymerizable unsaturated group can be introduced by reacting the polymer or copolymer of the above-mentioned monomers by the following methods (a) to (d).

(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.

(B) In the case of a polymer or copolymer of a monomer having a carboxyl group or a sulfone 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 an isocyanate compound and a hydroxyl group-containing acrylate monomer The addition reaction is carried out with a 1: 1 mol adduct of

In order to carry out the above reaction, it is preferable to add a trace amount of a polymerization inhibitor such as hydroquinone and to carry out the drying air.

(2) A compound having a melting point of 0 to 250 ° C. and a radically polymerizable unsaturated group. Specifically, stearyl acrylate,
Stearyl methacrylate, triacryl isocyanurate, cyclohexanediol diacrylate, cyclohexanediol dimethacrylate, spiroglycol diacrylate, spiroglycol dimethacrylate and the like can be mentioned.

The thermoformable substances of the above (1) and (2) can be used as a mixture, and a radical polymerizable unsaturated monomer can be added to them. This radically polymerizable unsaturated monomer is to improve the crosslink density and heat resistance upon irradiation with ionizing radiation, and in addition to the above-mentioned monomers, ethylene glycol diacrylate, ethylene glycol dimethacrylate, Polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, hexanediol diacrylate, hexanediol dimethacrylate, trimethylolpropane triacrylate,
Trimethylolpropane trimethacrylate, trimethylolpropane diacrylate, trimethylolpropane dimethacrylate, pentaerythritol tetraacrylate, pentaerythritol tetramethacrylate, pentaerythritol triacrylate, pentaerythritol trimethacrylate, dipentaerythritol hexamethacrylate, dipentaerythritol hexamethacrylate, Ethylene glycol diglycidyl ether diacrylate, ethylene glycol diglycidyl ether dimethacrylate, polyethylene glycol diglycidyl ether diacrylate, polyethylene glycol diglycidyl ether dimethacrylate, propylene glycol diglycidyl ether diacrylate, propylene glycol Rudiglycidyl ether dimethacrylate, polypropylene glycol diglycidyl ether diacrylate, polypropylene glycol diglycidyl ether dimethacrylate, sorbitol tetraglycidyl ether tetraacrylate, sorbitol tetraglycidyl ether tetramethacrylate, etc. can be used, and the solid content of the copolymer mixture. 100
It is preferable to use 0.1 to 100 parts by weight based on parts by weight.
The above compounds can be sufficiently cured by electron beams, but when cured by irradiation with ultraviolet rays, benzoin ethers such as benzoquinone, benzoin, and benzoin methyl ether; halogenated acetophenones; biacetyls and the like as sensitizers. Those that generate radicals by irradiation with the ultraviolet ray can also be used.

In the present invention, the transparent thin film 5 formed on the relief surface is
It may be larger or smaller than the refractive index of the resin layer 2 (usually, the refractive index n = 1.3 to 1.6), but the difference in refractive index is 0.1 or more, more preferably 0.5 or more, and particularly preferably 1.0 or more. .

An inorganic compound or resin is used as the transparent thin film 5,
For example, the following may be mentioned (hereinafter, the refractive index: n is added in parentheses to the right of the material name).

Inorganic compounds having a higher refractive index than the resin layer 2 on which the relief of the hologram is formed include Sb ₂ S ₃ (n = 3.0) and Fe ₂ O.
₃ (n = 2.7), PbO (n = 2.6), ZnSe (n = 2.6), CdS
(N = 2.6), Bi ₂ O ₃ (n = 2.4), TiO ₂ (n = 2.3), Pb
Cl ₂ (n = 2.3), CeO ₂ (n = 2.2), Ta ₂ O ₅ (n = 2.
2), ZnS (n = 2.1), ZnO (n = 2.1), CdO (n = 2.
1), Nd ₂ O ₃ (n = 2.1), Sb ₂ O ₃ (n = 2.0), ZrO ₂ (n
= 2.0), WO ₃ (n = 2.0), Pr ₆ O ₁₁ (n = 2.0), SiO
(N = 2.0), In ₂ O ₃ (n = 2.0), Y ₂ O ₃ (n = 1.9), Ti
O (n = 1.9), ThO ₂ (n = 1.9), Si ₂ O ₃ (n = 1.9), P
bF ₂ (n = 1.8), Cd ₂ O ₃ (n = 1.8), La ₂ O ₃ (n = 1.
8), MgO (n = 1.7), Al ₂ O ₃ (n = 1.6), LaF ₃ (n =
1.6), CaO ・ SiO ₂ (n = 1.6), CeF ₃ (n = 1.6), NdF ₃
(N = 1.6), SiO ₂ (n = 1.5), SiO ₃ (n = 1.5), ThF
₄ (n = 1.5), CdSe (n = 3.5), CdTe (n = 2.6), Ge
(N = 4.0 to 4.4), HfO ₂ (n = 2.2), PbTe (n = 5.
6), Si (n = 3.4), Te (n = 4.9), TlCl (n = 2.
6), ZnTe (n = 2.8), CuCl (n = 2.0), CuBr (n =
2.2), GaAs (n = 3.3 to 3.6), GaP (n = 3.3 to 3.5),
N ₄ (CH ₂ ) ₆ (n = 1.6), Bi ₄ (GeO ₄ ) ₃ (n = 2.1),
KH ₂ PO ₄ (KDP) (n = 1.5), KD ₂ PO ₄ (n = 1.5), NH ₄ H ₂
PO ₄ (n = 1.5), KH ₂ AsO ₄ (n = 1.6), PbH ₂ AsO ₄ (n =
1.6), KTa _0.65 Nb _0.35 O ₃ (n = 2.3), K _0.6 Li _0.4 NbO
₃ (n = 2.3), KSr ₂ Nb ₅ O ₁₅ (n = 2.3), Sr _X Ba _1-X Nb ₂ O ₆
(N = 2.3), Ba ₂ NaNbO ₁₅ (N = 2.3), LiNbO ₃ (n = 2.
3), LiTaO ₃ (n = 2.2), BaTiO ₃ (n = 2.4), SrTiO ₃
(N = 2.4), KTaO ₃ (n = 2.2) and the like. Inorganic compounds with low refractive index include LiF (n = 1.4), MgF ₂
(N = 1.4), 3NaF ・ AlF ₃ (n = 1.4), AlF ₃ (n = 1.
4), GaF ₂ (n = 1.3), NaF (n = 1.3) and the like. Further, as the resin, polytetrafluoroethylene (n = 1.35), polychlorotrifluoroethylene (n =
1.43), vinyl acetate resin (n = 1.45 to 1.47), polyethylene (n = 1.50 to 1.54), polypropylene (n = 1.4
9), methyl methacrylate resin (n = 1.49), nylon (n = 1.53), polystyrene (n = 1.60), polyvinylidene chloride (n = 1.60 to 1.63), vinyl butyral resin (n = 1.48), vinyl formal resin ( n = 1.50), polyvinyl chloride (n = 1.52 to 1.55), polyester resin (n = 1.52 to 1.57), carboxylic acid formalin resin (n = 1.5)
~ 1.7) and the like. The transparent thin film 5 may be formed by using these inorganic compounds and resins alone.
As shown in the figure, they may be appropriately combined and laminated so as to be composed of two layers 5a and 5b. The thickness of the transparent thin film 5 formed of these inorganic compounds and resins is 10 to 1000.
0Å, particularly 100 to 5000 is preferable.

As a method of providing the transparent thin film 5 on the resin layer 2 on which the hologram is formed, for example, when the transparent thin film 5 is formed of an inorganic compound, a vacuum deposition method, a sputtering method, a reactive sputtering method, an ion plating method, an electroplating method. When a resin is used, a general coating method or the like can be used.

The adhesive tape having a hologram pattern of the present invention can be appropriately colored on the film substrate 1. Further, as shown in FIG. 2, a colored layer 6 may be provided on the tape-shaped film substrate 1, and a picture layer 7 such as letters and patterns may be further provided thereon to form a display portion. Both the colored layer 6 and the pattern layer 7 may be provided, or either one or both may be provided. The colored layer 6 is provided in a range that does not impair the transparency of the adhesive tape.

The pressure-sensitive adhesive layer 4 is formed by applying a pressure-sensitive adhesive by a doctor blade method, a reverse roll method or the like and drying it with hot air. Examples of the pressure-sensitive adhesive used to form the pressure-sensitive adhesive layer 4 include natural rubber, butyl rubber, polyisobutylene rubber, styrene-butadiene rubber, butadiene-acrylonitrile rubber, polyacrylic acid ester, polyvinyl ether, polyvinyl acetal, and other polymers, and terpene resin. , Rosin, rosin ester or its derivative, phenol resin, petroleum resin, coumarone indene resin, hercoline (hydroxy abeetic acid ester), polybutylene, pothiacrylamide, etc. are appropriately blended, and if necessary, an antioxidant and a coloring agent. What was added to this is dissolved in a solvent such as a petroleum solvent, toluene or acetic acid ester is used.

Hereinafter, the present invention will be described in more detail with reference to specific embodiments.

Example 1 A resin obtained by using a polyethylene terephthalate film having a thickness of 16 μm, one side of which was back-treated with a silicone resin, as a base material, and mixing acrylic resin and melamine resin on the other surface of the base material in a weight ratio of 4: 1. A resin layer on which a relief hologram is formed is provided so that the non-relief surface of the resin layer and the substrate are in contact with each other, and then a 1200 Å ZnS thin film (refractive index: n = 2.3 ) Was formed. Acrylic ester-based adhesive (Arontac S-3403: manufactured by Toagosei Chemical Industry Co., Ltd.) 100
By weight, an adhesive consisting of 0.6 parts by weight of polyisocyanate (Coronate L: made by Nippon Polyurethane) and 100 parts by weight of toluene was applied by a roll coating method to give an applied amount of 200 g / m ²
And was dried with hot air to form a pressure-sensitive adhesive layer. Then, after slitting to a width of 18 mm, it was wound into a roll to obtain an adhesive tape. This adhesive tape exhibited a beautiful hologram pattern.

[Advantages of the Invention] As described above, the adhesive tape having the hologram pattern of the present invention is an inorganic compound or a transparent thin film of a resin, which is made of a transparent material having a refractive index different from that of the resin layer on the relief surface of the reflection hologram forming layer. Is provided so as to follow the relief surface, it has the following effects peculiar to the present invention.

By forming the transparent thin film having a refractive index different from that of the resin layer on the reflective hologram forming layer, a hologram image having a good hologram effect can be obtained.

Since the adhesive tape is transparent except at a specific angle where the design of the reflection hologram is reproduced, there is no discomfort like a reflective metal thin film when the adhesive tape is attached to the adherend, and it is a transparent cellophane tape. Can be used as well.

Since the reflective hologram forming layer itself is formed transparent,
Even if the hologram forming layer is of a reflective type, it does not hide the lower layer. Therefore, as shown in FIG. 2, a pattern layer or a coloring layer is provided under the hologram forming layer to give a design effect of a pattern mixed with the hologram design. be able to.

Since the transparent thin film is an inorganic compound or resin, there is no fear of aging such as a metal thin film due to oxidation or corrosion, the reflectance does not decrease over a long period of time, and the stability of the hologram image is good.

[Brief description of drawings]

1 and 2 are longitudinal sectional views showing an embodiment of an adhesive tape having a hologram pattern of the present invention. 1 ... Tape-shaped film substrate 2 ... Resin layer 3 ... Reflective hologram forming layer 4 ... Adhesive layer 5 ... Transparent thin film 6 ... Coloring layer 7 ... Picture layer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A 61-190370 (JP, A) JP-A 57-158873 (JP, A) Actually opened 59-178661 (JP, U)

Claims (4)

[Scope of utility model registration request] 1. A reflection-type hologram forming layer comprising a tape-shaped film substrate, wherein a relief corresponding to hologram interference fringes is provided on the surface of a resin layer, and a transparent thin film is provided so as to follow the relief surface of the resin layer. A pressure-sensitive adhesive tape having a hologram pattern comprising a laminate provided on one side and an adhesive layer provided on one side of the laminate, wherein the transparent thin film is a transparent inorganic compound having a different refractive index from the resin layer or An adhesive tape having a hologram pattern, which is made of a resin. 2. An adhesive tape having a hologram pattern according to claim 1, wherein the transparent thin film is formed as a multilayer structure. 3. An adhesive tape having a hologram pattern according to claim 1 or 2, wherein the film base material is colored. 4. An adhesive tape having a hologram pattern according to any one of claims 1 to 3, which has a colored layer and / or a pattern layer on a film substrate.