JP5522356B2 - Hologram thread and hologram thread paper - Google Patents

Description

  The present invention relates to a hologram thread, and more particularly to a hologram thread and hologram thread paper for preventing counterfeiting.

  Conventionally, hologram threads using holograms have been disclosed as anti-counterfeit threads that can be used for paper such as tickets and gift certificates (see Patent Document 1 and Patent Document 2).

  Further, a forgery prevention thread having a liquid crystal layer without forming a hologram due to high cost is disclosed (see Patent Document 3).

JP-A-10-71759 JP-A-11-78326 JP 2004-53870 A

  However, in order to make a thread having a hologram layer and a liquid crystal layer and having a high anti-counterfeiting effect, conventionally, a hologram film using a demetalization process in which an aluminum vapor deposition layer of an embossed hologram is partially removed and processed into characters and patterns In some cases, the liquid crystal film is formed by superimposing the liquid crystal film, and the liquid crystal layer may become invisible in the aluminum vapor deposition layer. As a result, it has been difficult to confirm a liquid crystal layer for preventing forgery.

  The present invention has been made in view of such problems of the prior art, and an object of the present invention is to provide a hologram thread and hologram thread paper that have a high anti-counterfeit effect and can be produced in large quantities at low cost.

  The hologram thread of the present invention that achieves the above object comprises a base film, a liquid crystal layer disposed on one side of the base film, and a primer layer disposed on the opposite side of the liquid crystal layer from the base film. An EPC line printed on the primer layer, a hard coat layer disposed on the opposite side of the primer layer from the liquid crystal layer and covering the EPC line, and a hologram layer disposed on the other side of the substrate film; A deposition layer disposed on the opposite side of the hologram layer from the base film, a UV anchor layer disposed on the deposition layer opposite to the hologram layer, and the deposition layer of the UV anchor layer. Is a printed layer disposed on the opposite side of the printed layer, a fluorescent layer disposed on the printed layer opposite to the UV anchor layer, and a first heat disposed on the fluorescent layer on the opposite side of the printed layer. A seal layer, wherein the said primer layer of the hard coat layer and having a second heat sealing layer disposed on the opposite side.

  The printed layer is formed by offset printing using black magnetic ink.

  The printed layer is formed by a reversed character removal pattern using thin line characters.

  Furthermore, the hologram thread paper of the present invention is characterized in that the hologram thread is formed by scribing into the paper.

  According to the present invention, it is possible to provide a hologram thread and hologram thread paper that have a high anti-counterfeit effect and can be produced in large quantities at low cost.

It is sectional drawing of the hologram thread | sled of this embodiment. It is a figure which shows the manufacturing method of the hologram thread | sled of this embodiment. It is a figure which shows the manufacturing method of the hologram thread | sled of this embodiment. It is a figure which shows the manufacturing method of the hologram thread | sled of this embodiment. It is the figure which put the black line in the hologram thread of this embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic sectional view showing an embodiment of the hologram transfer foil of the present invention. In FIG. 1, a hologram thread 1 includes a base film 2, a liquid crystal layer 3 disposed on one side of the base film 2, and a primer layer 4 disposed on the opposite side of the liquid crystal layer 3 from the base film 2. The EPC line 5 printed on the primer layer 4, the hard coat layer 6 disposed on the opposite side of the primer layer 4 from the liquid crystal layer 3 and covering the EPC line 5, and the other of the base film 2. Hologram layer 7, vapor deposition layer 7 disposed on the opposite side of hologram film 7 from substrate film 2, UV anchor layer 9 disposed on the opposite side of vapor deposition layer 8 from hologram layer 7, and UV anchor layer 9, the printed layer 10 disposed on the opposite side of the vapor-deposited layer 8, the fluorescent layer 11 disposed on the printed layer 10 on the opposite side of the UV anchor layer 9, and the fluorescent layer 11 on the opposite side of the printed layer 10. 1st heat seal layer 1 arranged in When, the primer layer 4 of the hard coat layer 6 and a second heat seal layer 13 disposed on the opposite side.

  Next, a method for manufacturing a hologram thread will be described. 2-4 is a figure which shows the manufacturing method of the hologram thread | sled of this embodiment.

  FIG. 2A is a diagram showing the base film 2.

  The base film 2 can be one having dimensional stability, heat resistance, toughness, etc., for example, polyethylene, ethylene-vinyl acetate copolymer, polyvinyl acetate, polyvinylidene chloride, polyfluorinated ethylene, Polyvinylidene fluoride, polystyrene, polymethyl methacrylate, nylon (registered trademark), polynorbornene, polyamide, polyimide, polyether sulfone, polyether ether ketone, triacetyl cellulose, polyethylene terephthalate, polyvinyl chloride, polypropylene, polycarbonate, cellophane, vinylon (Registered trademark), acetate, polyvinyl alcohol, ethylene-vinyl alcohol copolymer, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, polyamideimide, and other resin films. Arm, paper such as condenser paper, it is possible to use these complexes, and the like. The thickness of the base film 2 can be appropriately set in consideration of the material to be used, and can be set, for example, in the range of about 6 to 50 μm. In particular, the range of about 16 to 25 μm is preferable.

  In the present embodiment, polyethylene terephthalate (PET) having a thickness of 16 μm is used, passed through a felt rubbing roller, a rubbing treatment for liquid crystal alignment is performed on the liquid crystal coating surface, and a corona treatment for adhering a liquid crystal coating film is performed on the surface.

  FIG. 2B is a diagram in which the liquid crystal layer 3 is formed on one side of the base film 2.

In the liquid crystal layer 3 of the present embodiment, a liquid crystal coating liquid containing a UV curable resin is applied to the substrate film 2 after the corona treatment, dried at 80 ° C. for 30 seconds, and then cured by a UV irradiation device, and the thickness is 2.5 μm. Form with. The liquid crystal coating liquid has the following components.
BF-C-20R (Inktec) 100 parts by weight Cyclohexanone 20 parts by weight MEK 20 parts by weight

  FIG. 2C is a diagram in which a primer layer 4 is formed on the side of the liquid crystal layer 3 opposite to the base film 2.

The primer layer 4 of the present embodiment is applied with a coating solution on the liquid crystal layer 3 and dried at 100 ° C. for 20 seconds, and then subjected to room temperature aging for 3 days for isocyanic crosslinking curing. The thickness of the primer layer 4 is 1 μm. The coating liquid used for the primer layer 4 is the following components.
LC anchor 100 parts by weight Curing agent D 5 parts by weight KT-11 150 parts by weight

  FIG. 2D is a diagram in which a black line 5 for EPC (edge line sensor) is formed on the side of the primer layer 4 opposite to the liquid crystal layer 3.

  The EPC line 5 of this embodiment is important for controlling all of the duplication EPC, offset printing EPC, and slit EPC and performing pattern alignment. The EPC line 5 is printed and cured at room temperature for one day before applying a hologram layer 7 described later.

  FIG. 5 is a diagram in which a black line is added to the hologram thread of this embodiment. A cross-sectional view taken along the line aa in the figure corresponds to the view of the original hologram thread in FIG. The number of EPC lines 5 to be inserted for traverse winding control is determined. If wrinkles are generated during UV curing, use a red line with little absorption in the infrared band generated from the UV lamp or a green line with little absorption in the central band of visible light without using the black line. These may be used for EPC control using a sensor. The width of the EPC line 5 is 3 to 10 mm, preferably 3 to 5 mm.

The EPC line 5 includes the following components.
Colored OP Varnish (made by Showa Ink Industries Co., Ltd.) 100 parts by weight Curing agent D 5 parts by weight KT-11 30 parts by weight

  FIG. 2E is a diagram in which a hard coat layer 6 that covers the EPC line 5 is formed on the opposite side of the primer layer 4 from the liquid crystal layer 3.

  The hard coat layer 6 coats the EPC line 5 and blocks the second heat seal layer 13 described later. For example, it is preferable to disperse microsilica in order to provide slipperiness to an antistatic UV ink. The film thickness of the back coat layer 7 is preferably about 2 to 3 μm.

The hard coat layer 6 of this embodiment is formed with a thickness of 3 μm by applying a UV curable hard coat layer on the primer layer 4 after aging, drying at 100 ° C. for 20 seconds, and curing with a UV irradiation apparatus. The The hard coat layer 6 is composed of the following components.
KIZ044 mat (manufactured by The Inktec Co., Ltd.) 100 parts by weight KT-11 120 parts by weight

  FIG. 3A is a diagram in which a hologram layer 7 is formed on the other side of the base film 2.

  The hologram in the hologram layer 7 is not limited to a three-dimensional image, but includes an optical element in which a constant continuous pattern or a discontinuous pattern is formed, for example, an antireflection element called a diffraction grating or a moth eye. For example, the hologram layer 7 can be a relief-type hologram layer.

  The hologram layer 7 is preferably made of an ultraviolet curable crosslinked resin. The resin preferably contains a cross-linking structure adjusting additive that adjusts the number of cross-links.

  When the hologram layer 7 is a relief hologram, it is formed using a thermosetting resin, a thermoplastic resin, an ionizing radiation curable resin, etc. in order to form a fine uneven pattern, and the thickness is 0.1 to 20 μm. Preferably, it can set in the range of 0.5-10 micrometers. A range of about 1 to 2 μm is more preferable. In particular, in the case of ionizing radiation curable resin, 1.7 to 3.0 μm is preferable. In this case, if it is below the lower limit, it becomes the curing alienation limit of radiation curing, and if it exceeds the upper limit, the cutting property at the time of transfer may be deteriorated.

  Examples of thermosetting resins include unsaturated polyester resins, acrylic urethane resins, epoxy resins, urethane resins, epoxy-modified acrylic resins, epoxy-modified unsaturated polyester resins, alkyd resins, melamine resins, urea resins, phenol resins, and cellulose resins. Organic-inorganic hybrid resins containing metal alkoxide groups capable of sol-gel reaction with organic components, such as diallyl phthalate resin and polyacetal resin. Thermoplastic resins include acrylic resin, acrylamide resin, polystyrene resin, polyester resin, polyolefin, polyamide, polyimide, polyamideimide, polyurethane, nylon (registered trademark), polyvinyl acetate, polyvinyl alcohol, polyvinyl butyral, polycarbonate, silicone. Examples thereof include resins. These resins can be used alone or in combination of two or more kinds, and various isocyanate resins, metal soaps such as cobalt naphthenate and zinc naphthenate, peroxides such as methyl ethyl ketone peroxide, Thermal or ultraviolet curing agents such as benzophenone, acetophenone, anthraquinone, naphthoquinone, azobisisobutyronitrile, and diphenyl sulfide may be blended.

  In addition, as the ionizing radiation curable resin, a monomer, oligomer, polymer, or the like having an ethylenically unsaturated bond can be used. Examples of the monomer include 1,6-hexanediol, neopentyl glycol diacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, and the like. . Examples of the oligomer include epoxy acrylate, urethane acrylate, and polyester acrylate. Examples of the polymer include urethane-modified acrylic resins and epoxy-modified acrylic resins. From the viewpoints of heat resistance and processability, urethane-modified acrylic resins as described in JP-A No. 2000-63459 are preferably used.

  Further, as the photocurable resin used for the hologram layer 7, photocurable resins as described in JP-A-61-98751, JP-A-63-23909, and JP-A-63-23910 are disclosed. Resins can be mentioned.

  Moreover, in order to form the uneven | corrugated pattern shape of a relief hologram correctly, polymers, such as a non-reactive acrylic resin, polyester resin, a urethane resin, an epoxy resin, can be added.

  Moreover, when utilizing photocationic polymerization, an epoxy group-containing monomer, oligomer, polymer, oxetane skeleton-containing compound, and vinyl ethers can be used.

  Further, when the ionizing radiation curable resin is cured by light such as ultraviolet rays, a photopolymerization initiator can be added. Depending on the resin, a radical photopolymerization initiator, a cationic photopolymerization initiator, or a combination thereof (hybrid type) can be selected.

  Examples of the photo radical polymerization initiator include benzoin compounds such as benzoin, benzoin methyl ether, and benzoin ethyl ether, anthraquinone compounds such as anthraquinone and methylanthraquinone, acetophenone, diethoxyacetophenone, benzophenone, hydroxyacetophenone, and 1-hydroxycyclohexyl. Examples include phenyl ketone compounds such as phenyl ketone, α-aminoacetophenone, 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one, benzyldimethyl ketal, thioxanthone, acylphosphine oxide, Michler's ketone, and the like. be able to.

  As a photocationic polymerization initiator when using a compound capable of photocationic polymerization, aromatic diazonium salts, aromatic iodonium salts, aromatic sulfonium salts, aromatic phosphonium salts, mixed ligand metal salts, etc. should be used. Can do.

  In the case of so-called hybrid type materials that use both radical photopolymerization and cationic photopolymerization, each polymerization initiator can be mixed and used, and a fragrance that has the function of initiating polymerization of both with a single initiator. Group iodonium salts, aromatic sulfonium salts, and the like can be used.

  Furthermore, a release agent can be added to the hologram layer 7 in order to facilitate the formation of the concavo-convex pattern of the hologram. Examples of the release agent include known release agents and surfactants, for example, solid waxes such as polyethylene wax and amide wax, fluorine compounds, fluorine polymers, phosphate esters, silicone oils, and silicone resins.

  Moreover, in order to make the uneven shape of the relief accurate, or to impart hardness and heat resistance, inorganic oxide fine particles such as silica, titania and alumina, metal alkoxide, metal alkoxide oligomer and the like can be added.

  Furthermore, a polymerization inhibitor, an antioxidant, a sensitizer, an ultraviolet absorber, a stabilizer, a plasticizer, an antifoaming agent, and the like can be added to the hologram layer 7.

The hologram layer 7 of the present embodiment is first coated with a hologram forming coating solution and dried at 100 ° C. for 20 seconds to form a hologram forming layer with a thickness of 2 μm. The hologram-forming coating liquid comprises the following components.
100 parts by weight of photocurable resin (MHX405, manufactured by The Inktec Co., Ltd.)
(The Inktec Co., Ltd. MIBK) 150 parts by weight

  Thereafter, the hologram having the embossed hologram and the diffraction grating pattern unevenness formed thereon is pressed on the hologram forming layer to form a replication embossed hologram and a diffraction grating pattern replication hologram.

  Then, after duplication, UV curing and crosslinking curing are performed by a UV irradiation apparatus, and after-baking is performed at 100 ° C. for 30 seconds to remove the residual residue. The adhesiveness of the vapor deposition layer 8 mentioned later improves by removing a hardening residue by after-baking.

  In addition, as a hologram material, JP-A-2002-268523, JP-A-2000-272295, JP-A-3357013, JP-A-33557014, JP-A-2005-55473, JP-A-2001-329031 or special Reference may be made to the materials described in Japanese Unexamined Patent Publication No. 2005-115264.

  FIG. 3B is a diagram in which a vapor deposition layer 8 is formed on the opposite side of the hologram layer 7 from the base film 2.

  The vapor deposition layer 8 of the present embodiment uses a hologram effect thin film that combines with the hologram layer 7 to express a hologram and does not conceal the lower layer. The vapor deposition layer 8 is formed as a transparent reflective layer by performing easy adhesion treatment on the corona-treated hologram layer 7 and then forming a thin film having a thickness of 50 nm to 100 nm with TiO 2 or ZnS by a physical vapor deposition device. .

  In addition, regarding the material of the vapor deposition layer 8, it is good to refer to the material described in Japanese Patent Publication No. 5-87835. In particular, TiO2 that does not undergo oxidative degradation is preferable for high durability, but ZnS is preferable for low cost and high luminance.

  FIG. 3C is a diagram in which a UV anchor layer 9 is formed on the opposite side of the vapor deposition layer 8 from the hologram layer 7.

The UV anchor layer 9 is formed on the vapor deposition layer 8 by UV offset printing of a vinyl acetate resin, dried at 100 ° C. for 20 seconds, and then subjected to room temperature aging for 1 day. The thickness of the UV anchor layer 9 is 2 μm. The UV anchor layer 9 is composed of the following components.
RL primer 100 parts by weight Curing agent D 5 parts by weight KT-11 150 parts by weight

  FIG. 3D is a diagram in which a printing layer 10 is formed on the opposite side of the UV anchor layer 9 from the vapor deposition layer 8.

The printed layer 10 is roll-to-roll printed at a speed of 120 m / min on a UV anchor layer 9 by using an MICR UV magnetic ink black and printed with a reverse line with a fine line character at a speed of 120 m / min. Thus, a thin magnetic printing layer is formed. The thickness of the printing layer 10 is 2 μm. The offset magnetic ink of the printing layer 10 is colored with carbon black because the color of the magnetic powder is brown iron oxide. By adding about 5% by weight of carbon black, the spectral transmittance can be reduced to 0% in the ultraviolet / visible / infrared region even at a fill rate of 1 g / m ² . By forming the black background layer at a low cost by offset printing using this black magnetic ink, the intensity of the reflected light of the transparent vapor deposition layer is doubled to 10 times while suppressing the loss due to light transmission while performing pattern printing. Can be doubled. The offset magnetic ink of the printing layer 10 of this embodiment is as follows.
・ T & K TOKA UV MICR magnetic ink black SE

  In addition, if this ink suppresses light transmission of the transparent vapor deposition part and reflects light efficiently, it is not limited to black, and dark colors such as dark tones and primary colors such as red, green and blue may be used. If the effect can be maintained, it is possible not to use magnetic ink.

  Further, the printing of the printing layer 10 is not limited to offset printing, and may be flexible printing, gravure printing, silk printing, or the like.

  FIG. 4A is a diagram in which a fluorescent layer 11 is formed on the opposite side of the printed layer 10 from the UV anchor layer 9.

The fluorescent layer 11 according to the present embodiment forms a transparent fluorescent light emitting layer by performing roll-to-roll printing at a speed of 120 m / min on a magnetic offset printing surface after UV curing of the printing layer 10 by using a transparent fluorescent offset printing on the entire surface. It is a thing. The thickness of the fluorescent layer 11 is 2 μm. The offset ink of the fluorescent layer 11 is as follows.
・ Transparent fluorescent UV offset edge (The Inktec Co., Ltd.)

  FIG. 4B is a diagram in which a first heat seal layer 12 is formed on the opposite side of the fluorescent layer 11 from the printed layer 10.

The first heat seal layer 12 of this embodiment is coated with a silica-containing ethylene-acrylic acid copolymer emulsion in order to improve low-temperature adhesiveness and facilitate adhesion to paper after offset printing of the fluorescent layer 11. Forms a layer to which the threads adhere when dried at 0 ° C. for 1 minute and scrubbed into paper. The coating amount is 6-9 g / m ² for blocking resistance.

  FIG. 4C is a diagram in which the second heat seal layer 13 is formed on the opposite side of the hard coat layer 6 from the primer layer 4.

The second heat seal layer 13 of this embodiment is coated with an ethylene-acrylic acid copolymer emulsion containing silica and dried at 120 ° C. for 1 minute in order to improve low-temperature adhesion and facilitate adhesion to paper. Forming a layer to which the thread adheres when rubbed into. The coating amount is 6-9 g / m ² for blocking resistance.

  As the first heat seal layer 12 and the second heat seal layer 13, it is preferable to use a thermoplastic resin. Moreover, as a thermoplastic resin, the thermoplastic resin conventionally used as a heat seal agent can be used. For example, rubber systems such as polybutadiene, polyisoprene, polyisobutylene, styrene-butadiene rubber, styrene-isoprene rubber, polymethyl (meth) acrylic acid, polymethyl (meth) acrylate, poly (meth) acrylic acid, polyethyl (meth) acrylate, Acrylic resin systems such as polypropyl (meth) acrylate, polybutyl (meth) acrylate, poly (2-ethylhexyl) (meth) acrylate, polystyrene systems such as polystyrene and acrylic-styrene copolymers, and polyvinyl ether systems such as polyisobutyl ether , Polyolefins such as polyethylene, polypropylene, polybutene, etc., polyvinyl acetate, vinyl chloride-vinyl acetate, polyvinyl alcohol, polyvinylidene chloride, polyvinyl chloride, polyacrylamide, Li-methylolacrylamide, polyester, polyvinyl butyral, polyurethane, polycarbonate resins, silicone resins, acrylic - silicone resin, polyethylene oxide and the like can be used. Examples of the copolymer include copolymers of vinyl acetate and acrylic resin such as vinyl acetate-butyl (meth) acrylate and vinyl acetate-octyl (meth) acrylate, vinyl chloride-butyl (meth) acrylate, vinylidene chloride- Copolymers such as butyl (meth) acrylate, copolymers such as ethylene-butyl (meth) acrylate, ethylene-methyl (meth) acrylate, and the like can be used. Two or more of these resins may be used. From the viewpoint of softening temperature and adhesion, a copolymer of an olefin resin and an acrylic resin, such as ethylene- (meth) acrylic acid, ethylene-methyl (meth) acrylate, or a blend of an olefin resin and an acrylic resin is particularly preferable. .

  In the present invention, a known filler such as silica fine particles, alumina fine particles, colloidal fine particles, etc. may be added to the first heat seal layer 12 and the second heat seal layer 13 in order to improve the foil cutting property. Good. However, since these fine particles are not usually softened by heat during transfer, the content in the first heat seal layer 12 and the second heat seal layer 13 is 10% by weight or less from the viewpoint of low temperature sealability. It is preferable that

  In addition, regarding the material of the heat seal layer 6, it is preferable to refer to the materials described in Japanese Patent No. 3140820, Japanese Patent Laid-Open No. 4-185498, and Japanese Patent Laid-Open No. 9-39391.

  The hologram thread original fabric of the present embodiment described with reference to FIGS. 1 to 4 is slit to 80 mm width, and then slit to a 3 mm thin line based on the EPC slit line, and traverse winding is performed.

  The traverse-wound thread thread is squeezed into the paper during paper cutting to create a liquid crystal holomagnetic fluorescent thread paper.

  As described above, the hologram thread of the present invention has been described based on the embodiments. However, the present invention is not limited to these embodiments, and various modifications are possible.

DESCRIPTION OF SYMBOLS 1 ... Hologram thread 2 ... Base film 3 ... Liquid crystal layer 4 ... Primer layer 5 ... EPC line 6 ... Hard coat layer 7 ... Hologram layer 8 ... Deposition layer 9 ... UV anchor layer 10 ... Print layer 11 ... Fluorescent layer 12 ... 1st heat seal layer 13 ... 2nd heat seal layer

Claims (4)

A base film;
A liquid crystal layer disposed on one side of the base film;
A primer layer disposed on the opposite side of the liquid crystal layer from the substrate film,
An EPC line printed on the primer layer;
A hard coat layer disposed on the opposite side of the primer layer from the liquid crystal layer and covering the EPC line;
A hologram layer disposed on the other side of the base film;
A vapor deposition layer disposed on the opposite side of the hologram layer from the substrate film;
A UV anchor layer disposed on the opposite side of the vapor deposition layer from the hologram layer;
A printed layer disposed on the opposite side of the UV anchor layer from the deposited layer;
A fluorescent layer disposed on the opposite side of the printed layer from the UV anchor layer;
A first heat seal layer disposed on the opposite side of the fluorescent layer from the printed layer;
A second heat seal layer disposed on the opposite side of the hard coat layer from the primer layer;
A hologram thread characterized by comprising:   The hologram thread according to claim 1, wherein the print layer is formed by offset printing using black magnetic ink.   The hologram thread according to claim 2, wherein the print layer is formed by a reversed character removal pattern using thin line characters.   A hologram thread paper, wherein the hologram thread according to any one of claims 1 to 3 is created by scribing into a paper.

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