KR20210081528A - Stamping foil used for eco-friendly paper packaging that can separate transfer film and paper for recycling - Google Patents

Abstract

The present invention is provided to solve a surface scratch problem that occurs during the manufacturing process and handling of an adherend to which stamping foil is applied, and to prevent a problem that a transfer layer of the stamping foil falls off from a bent portion when the adherend is folded. To this end, the stamping foil of the present invention includes: a base film to be removed after stamping transfer; a polyurethane-based release layer formed on the base film; an abrasion-resistant layer containing an acrylic matrix resin and an ethene-based polymer additive and formed on the polyurethane-based release layer; a cured moisture penetration prevention and metal deposition heat-resistant coating layer formed on the abrasion-resistant layer; a metal deposition layer formed on the cured coating layer; and a metal deposition layer corrosion prevention protective layer optionally formed on the metal deposition layer.

Description

Stamping foil used for eco-friendly paper packaging that can separate transfer film and paper for recycling

The present invention provides a stamping foil that can be used for eco-friendly paper packaging that can be recycled by separating the transfer film and paper; and to a method of manufacturing an adherend to which the stamping foil is applied.

Conventional laminated packaging materials are manufactured by laminating a metal vapor deposition film or a plastic film (mainly PET Film, BOPP Film) on paper. Since it is uneconomical to separate the plastic film and paper one by one due to the high cost and low efficiency, it is discarded in a laminated state after use. Furthermore, since the laminated packaging material cannot be buried, there is a problem in that the entire amount of the laminated packaging material in which the plastic film is laminated must be incinerated.

In the existing paper packaging materials, after depositing metal on a plastic film or plastic film, polysol or various paper adhesives are applied to the plastic film or metal-deposited surface, and after laminating directly on paper, various inks are applied to the plastic film surface. (PVC ink, Acryl ink, PET ink, PP ink, UV offset ink) is used for printing. At this time, in order to give printability and print bonding strength, a primer is mixed with dye and applied. Therefore, when the existing paper packaging material is disposed of after use, a plastic film remains on the packaging material to be discarded. In this case, since it takes more than 100 years for the plastic film to decompose in its natural state, it is impossible to landfill, and thus the waste must be disposed of by incineration.

Recently, instead of the plastic film, biodegradable or biodegradable films are deposited on biodegradable films or biodegradable films to manufacture packaging materials. However, the development of films that are easily decomposed in nature takes a lot of time, so now landfilling or recycling of packaging materials is fundamental. is currently impossible.

As a method of transferring a graphic pattern or character of a metal component to an adherend of various materials such as paper products, plastic molded products, leather products, and wood products, a stamping foil is used. This stamping foil is a type of dry printing method in which heat and pressure are applied using a die of a type to be transferred, and a hot stamping process is used.

The hot stamping process is a type of heat dry printing method in which a stamping foil is placed on a transfer object such as plastic, fiber, leather, or paper, and the stamping foil is pressed with a heated platen to attach a pattern such as letters or shapes. You can print the design, color, picture, and text you want to produce. The design can be printed in the same location regardless of the quantity of the product.

The stamping foil has a structure in which a release layer, a colored layer, a metal deposition layer, and an adhesive layer are sequentially stacked on a base film composed of a polyester resin. The stamping foil is also called a hot stamp tape or a thermal transfer tape.

Recently, there is a limit to applying various colors or designs to the stamping foil to ensure the clarity of the design, so there is a high demand in the market for a stamping foil that can print various colors of UV ink on the stamped surface after stamping. Accordingly, a stamping foil capable of printing various colors of UV ink on the transferred surface of the adherend has been developed.

The stamping foil is a release layer on the base film for coating processing, a colored layer that expresses color by putting a dye or pigment to give a color, a metal deposition layer that expresses metallic luster by depositing a metal such as aluminum, and adhesion to a subject It may be in the form of stacking a protective layer that serves to provide or protect the deposition layer. Alternatively, the above release layer, colored layer (or protective layer), metal deposition layer (or aluminum layer) and adhesive layer may be sequentially coated on a base film to prepare a stamping foil, and the components and composition and thickness of each layer etc. may vary depending on the intended use.

For the stamping foil to be used preferably in the hot stamping process, several conditions must be met. First, it must have gloss, abrasion resistance and chemical resistance, and secondly, it must have heat resistance to withstand the hot pressing process of high temperature after the adhesive solution application process. In addition, thirdly, the adhesion between these layers must be good so that the colored layer is not separated from the metal layer during the process of separating the base film and the release layer after transferring the desired pattern to the transfer object (paper, fiber, leather, etc.). In addition, the base film and the release layer should have a peeling force suitable for the intended use so that separation is easy, and in addition, the solvent resistance should be good. In addition, the stamping foil is also required to be cut to clearly distinguish the pattern of the transfer die (Stamping Die).

The present invention is to provide an eco-friendly paper packaging material that can be recycled as a raw material by transferring a stamping foil with a peelable plastic film to paper and disposing of the paper packaging material from which the plastic film is removed after use, through dissociation (Pulper) treatment. .

In addition, the present invention is to improve the surface scratching problem that occurs during the manufacturing process and handling of the adherend to which the stamping foil is applied, and to prevent the problem that the transfer layer of the stamping foil falls from the bent portion when the adherend is folded.

A first aspect of the present invention is a base film to be removed after stamping transfer; a polyurethane-based release layer formed on the base film; Acrylic matrix formed on polyurethane-based release layer abrasion-resistant layer containing a resin and an ethene-based polymer additive; a cured coating film layer formed on the wear-resistant layer to prevent moisture penetration and provide heat-resistance properties to the metal layer; a metal deposition layer formed on the cured coating layer; and optionally (optionally) providing a stamping foil having a metal deposition layer corrosion-preventing thick film protective layer formed on the metal deposition layer.

A second aspect of the present invention provides a first step of (i) applying an adhesive layer to the stamping foil or using a stamping foil having an adhesive layer formed thereon, and/or (ii) applying an adhesive layer to the entire surface or part of an adherend; a second step of stamping and transferring the stamping foil to the adherend; a third step of removing the base film of the stamping foil; and optionally (optionally) removing the base film and printing on the exposed surface of the release layer, wherein the stamping foil is used in the manufacturing method of the adherend to which the stamping foil is applied, characterized in that the stamping foil of the first aspect is used. It provides a method for manufacturing the adherend to which this is applied.

Hereinafter, the present invention will be described.

The stamping foil of the present invention, which can improve the surface scratch problem that occurs during the manufacturing process and handling of the adherend to which the stamping foil is applied, and prevent the transfer layer of the stamping foil from falling from the bent portion when the adherend is folded, is

a base film to be removed after stamping transfer;

a polyurethane-based release layer formed on the base film;

an abrasion-resistant layer containing an acrylic matrix resin and an ethene-based polymer additive formed on the polyurethane-based release layer;

a cured coating film layer formed on the wear-resistant layer to prevent moisture penetration and provide heat resistance to metal deposition;

a metal deposition layer formed on the cured coating layer; and

Optionally (optionally) a metal deposition layer formed on the metal deposition layer anti-corrosion thick film protective layer

to provide

In the stamping foil of the present invention, the base film to be removed after stamping transfer may be a plastic film.

Non-limiting examples of the base film include a polyethylene terephthalate (PET) film and a biaxially oriented polypropylene (BOPP) film.

PET material (Polyethylene Terephthalate) is a relatively dense polyester resin, which is a crystalline or amorphous thermoplastic. Amorphous PET has high transparency, but low tensile strength and low sliding properties, so it is mainly used for bottles or packaging. Crystalline PET has high hardness, rigidity and strength, and excellent sliding and abrasion resistance (compared to POM), so it is mainly used as a base film in manufacturing stamping foil.

BOPP film is a film that is biaxially stretched in the machine and vertical directions using polypropylene as the main raw material. It has excellent mechanical strength and optical properties by biaxial stretching and is widely used for food packaging and laminating applications.

In the stamping foil of the present invention, the release layer formed on the base film is a polyurethane-based resin.

In the stamping foil, the release layer has low adhesion with the base film, which is the transfer film, and when the base film is removed after the stamping foil is transferred onto the adherend, the release layer is located on the uppermost layer of the transferred surface, so UV ink printing is possible And it is preferable that the UV ink adhesion is good after printing. In case of using wax-based (OP Wax, PE Wax), cellulose-based (Cellulose Acetate, Cellulose Acetate Buthylate), or acrylic (methyl methacrylate) resin as a release agent, various inks to be printed (PVC ink, Acryl ink, PET Ink, PP ink) and UV offset printing and printing work are impossible due to the limitations of ink aptitude and ink bonding power.

As the polyurethane-based resin, one selected from polyurethane, polyether polyurethane, and polycarbonate polyurethane may be used.

The coating liquid for forming the release layer may contain a polyurethane-based resin and a diluent solvent.

The release layer is coated with a gravure coating method, the mesh of the gravure roll is 175 mesh, and it is suitable that the dilution solvent used to adjust the solid content is in a weight ratio of 4:6 to 6:4 of pure water from which isopropyl alcohol and ions are removed. . When coating in the above manner, the solid content of the polyurethane-based release composition is in the range of 0.5 to 3% by weight, preferably 0.8 to 1.5% by weight.

Gravure printing is a type of engraving printing, and is a method of printing by filling ink in the concave part of the printing plate.

The release layer has a different release effect depending on the coated thickness.

The dry application amount of the polyurethane-based release agent may be 0.1 to 1 g/m 2 . While easy peeling from the base film is possible within the above application amount range, perfect ink printability and ink bonding strength (especially UV offset ink) can be secured. If the polyurethane resin is applied with a dry application amount of less than 0.1 g/m2, a tearing problem may occur when the base film is peeled off after transfer, and if applied with a dry application amount of more than 1.0 g/m2, the release layer falls off too easily during the transfer operation. They can contaminate the substrate of the stamping foil.

The polyurethane-based release layer is a polyurethane-based release agent with an elongation of 100% or more to facilitate the front transfer operation while giving good printability and perfect print bonding strength to various inks (PVC ink, Acryl ink, PET ink, PP ink) and UV offset ink printing. can be used

The present invention applies an abrasion-resistant layer containing an acrylic matrix resin and an ethene-based polymer additive just below the polyurethane-based release layer exposed when the base film of the stamping foil is removed, thereby manufacturing process and handling of the adherend to which the stamping foil is applied. It is characterized in that it improves the surface scratch problem that occurs when the adherend is folded and the problem that the transfer layer of the stamping foil falls off at the bent edge portion when the adherend is folded (Example 2).

The abrasion-resistant layer in the stamping foil of the present invention uses an acrylic resin having compatibility and bonding strength with a polyurethane-based release agent as a matrix resin, and an ethene-based polymer is added thereto to solve the above problem. .

In order to maintain abrasion resistance and bonding strength with the polyurethane-based release agent, the coating solution of the wear-resistant layer applied on the polyurethane-based release layer formed on the base film is 16 to 18 wt% of abrasion-resistant acrylic resin and 3 to 5 wt% of Ethene-based polymer %, and other solvents may contain 77 to 81 wt%. Therefore, the greater the acrylic resin content out of the above content, the lower the abrasion resistance, and the greater the ethene-based polymer content is out of the above content, the lower the bonding strength with the polyurethane-based release agent.

The acrylic resin is a polymer of acrylic acid, methacrylic acid or a derivative thereof, and is usually a thermoplastic synthetic resin, and non-limiting examples thereof include polymethyl methacrylate (PMMA), and modified polymethyl methacrylate (Modified PMMA). etc.

PMMA is an acrylic resin polymerized using MMA (Methyl MethAcrylate) Monomer as the main raw material.

PMMA is widely used for its excellent permeability and weather resistance among resins, excellent colorability and beautiful appearance. In addition, PMMA is a linear polymer that is amorphous, has excellent surface strength, and exhibits abrasion resistance, heat resistance, and high rigidity.

As the ethene-based polymer, ethene homopolymer is mainly used, and is also called ethylene homopolymer, polyethylene wax, or ethylene resin.

Non-limiting examples of the ethene-based polymer (Polyethylene) include, in addition to the ethene homopolymer, ethylene acrylic acid copolymer (Ethylene Acrylic Acid Coploymer), polydimethyl siloxane (Polydimethyl Siloxane), and the like.

If the abrasion-resistant layer is applied in a dry coating amount of 0.4 ~ 2 g/m2, scratching of the paper surface and falling of the folded part can be improved when handling paper packaging materials.

The stamping foil of the present invention may have a cured coating layer formed on the wear-resistant layer to prevent penetration of moisture and provide heat resistance during metal deposition. The cured coating layer may be mixed with a dye for realizing a color in the coating solution to form a colored layer. Therefore, the colored layer is mainly applied with a mixture of a curable resin (Resin) and a dye (Dye) to protect the metal deposition layer and impart color, and affects the durability and weather resistance of the stamping foil.

There are an isocyanate curing method, a melamine curing method, and a blocked isocyanate curing method as a method for preparing a coloring solution employed in forming the colored layer.

The isocyanate curing method is mainly made by mixing Diallyl Phthalate resin, Nitro Cellulose resin, Vinyl Chloride Vinyl Acetate Copolymer resin, Hydroxed Acrylate resin with various solvents. A solution mixed in a certain ratio, and a solution in which isocyanate is mixed in a certain ratio as a curing agent is dried at a drying temperature of 185°C to 195°C for 5 to 10 seconds, after metal deposition, heat resistance (metal deposition layer) It is possible to manufacture stamping foils that reach 180°C (the highest temperature without thermal change).

The melamine curing method is a mixture of melamine resin and maleic resin in a certain ratio as the main ingredient, and then diethyl phosphate as a curing catalyst is mixed with various solvents in a certain ratio, and the drying temperature is 185. If it is dried at ℃ ~ 195℃ for 5 to 10 seconds, it is possible to manufacture a stamping foil having heat resistance (the highest temperature without thermal change of the metal deposition layer) reaching up to 160℃ after metal deposition.

Blocked isocyanate curing method is mainly Diallyl Phthalate resin, Nitro Cellulose resin, Vinyl Chloride Vinyl Acetate Copolymer resin, Blocked Isocyanate resin When a solution mixed with various solvents is dried at a drying temperature of 185°C to 195°C for 5 to 10 seconds, the heat resistance (the highest temperature without thermal change of the metal deposition layer) after metal deposition reaches 150°C. can be manufactured.

In the three manufacturing methods of the coloring solution, the isocyanate curing method, the melamine curing method, and the Blocked Isocyanate curing method, the heat resistance temperature of the metal deposition layer is 180°C, 160°C, and 150°C, respectively. Invar, it is advantageous to employ an isocyanate curing method.

For paper packaging materials employing the isocyanate curing method, it means that there is no change in packaging materials even when the storage temperature is 180°C.

In the case of using the coloring solution, even after printing various inks after transfer, moisture and other contamination from the outside can be blocked due to the inherently cured coating film of the colored layer, and heat resistance can be imparted during metal deposition, so that even after printing various inks There is no change in the packaging material at all.

In addition, when various dyes are added during the preparation process of the coloring solution when using the coloring solution, almost infinite colors can be expressed.

When the coloring liquid is used, the drying amount of the coloring liquid is preferably in the range of 1 to 2 g/m 2 .

In general, in the stamping foil, a metal-deposited layer is used to impart gloss.

Aluminum (Al), nickel (Ni), chromium (Cr), silver (Ag), and copper (Cu) are used for metal deposition to give gloss properties when manufacturing stamping foils, but most of them use aluminum (Al) by vacuum deposition. do.

When nickel (Ni) or chromium (Cr) is vacuum deposited, the color of titanium is expressed, and when copper (Cu) is vacuum deposited, brass color is expressed. However, before vacuum deposition of aluminum (Al), a coloring solution When a dye is added to the , a method of vacuum-depositing aluminum (Al) is mainly used because not only the above color but also almost infinite lustrous colors can be expressed. When the aluminum vacuum deposition is performed, the thickness of the deposition layer is preferably 0.001 to 0.0001 Å (Angstrong) and OD (Optical Density) 2.4±0.5.

In the case of vacuum deposition of metal, when the deposition layer is exposed to moisture (H₂O) and other contaminants, the deposition layer corrodes over time and deforms as if mold has occurred on the packaging material, so the weather resistance (depending on the climatic conditions) When a thick film protective layer is formed by mixing acryl-based resin with good unchanging properties) with vinyl-based resin and solvent with good metal bonding strength, and forming a thick film protective layer with a dry application amount in the range of 0.2 to 1.2 g/m2, moisture and other Even when exposed to contaminants, there is no deformation of the metal deposition layer. In addition, the thick film protective layer can prevent the penetration of polysol, various paper adhesives, and moisture contained inside the paper used for paper adhesion, so that the paper packaging material can be safely distributed.

The stamping foil of the present invention may include an adhesive layer bonded to the adherend, and may instead form the adhesive layer on the adherend. An adhesive layer coated by selecting a suitable resin according to the type of the adherend to be transferred by stamping may be provided. Formulation is different depending on the substrate to be transferred.

In the present invention, components other than the wear-resistant layer may be used without limitation as long as they are components commonly used in the field.

The manufacturing method of the adherend to which the stamping foil of the present invention is applied,

A first step of (i) applying an adhesive layer to the stamping foil or using a stamping foil having an adhesive layer formed thereon, and/or (ii) applying an adhesive layer to the entire surface or part of the adherend;

a second step of stamping and transferring the stamping foil to the adherend;

a third step of removing the base film of the stamping foil; and

and optionally (optionally) a fourth step of printing on the surface of the release layer exposed by removing the base film.

At this time, if the adherend is a paper product or a wooden product, the adherend printed through the stamping foil of the present invention is recyclable.

For example, when the stamping foil according to the present invention is used for transfer to paper, polysol or various adhesives are applied to the thick film protective layer of the stamping foil, laminated with paper, and then the plastic film of the stamping foil is peeled off, leaving only the paper. It can be used to manufacture eco-friendly paper packaging materials that can be recycled.

If the adherend is paper and a stamping foil for paper transfer, when the paper packaging material from which the plastic film is removed after the stamping foil transfer is disposed of, it can be recycled as a raw material through a dissociation (Pulper) treatment. Therefore, the waste paper packaging material can be recycled as a raw material by processing in a pulper installed in a raw material processing process of a paper company, thereby recycling resources, saving energy, and reducing costs.

The fourth stage of printing can be a graphic pattern, text, or both, and color printing is also possible.

In the fourth step, PVC ink, Acryl ink, PET ink, PP ink may be used, and UV offset printing may be used.

Offset printing is called "off-set" because the ink is off the plate, transferred to the rubber plate, and then applied to the paper (set). Offset printing machines do not directly print on paper from a printing plate, but use an indirect printing method that prints on a rubber plate once and then transfers it to the paper.

The printing plate used in offset printing is a flat plate without irregularities, and the surface of the flat plate is specially chemically treated. 'Water' is applied to the printing plate, but this water is applied only to the non-caustic part without ink, not to the caustic part where the ink is attached. In general, an offset printing machine consists of three devices: a plate cylinder, a rubber cylinder, and a pressure cylinder. The plate surface is outside the cylinder, and only the printed part is moved to the rubber cylinder. The pressure barrel works by pressing the paper against the printing surface of the rubber barrel. In the case of 4 degree offset printing, the ink expresses subtle tones by adding black to the three primary colors, yellow, red, and blue, and printing these colors over and over again.

In relation to UV offset printing, the selection of UV-curing ink is becoming inevitable in an effort to reduce organic solvents, which are a problem for the health of environmental workers when using solvent-type inks. Compared with conventional inks, instant drying, low-temperature and high-speed productivity, It has many advantages such as bio-energy, solvent-free and pollution-free.

Use (curing) inks that instantly harden when exposed to ultraviolet (UV) light.

In general, it is mainly used where the printed material does not dry well and absorbs well, such as PP, PVC, PET. Since there are various types, the use is increasing not only in the offset but also in the rotary press. There are general UV inks, UVpp inks (printing difficult-to-attach plastics), UV magnetic inks (magnetic inks), UV matte inks, UV fluorescent inks, and UV clear inks.

The stamping foil of the present invention (for example, a film in which a release layer, abrasion resistance layer, colored layer, metal vapor deposition layer, and thick film protective layer resin is applied to a plastic film) is obtained by transferring the coated surface of the plastic film to paper. It can be used in the manufacture of eco-friendly paper packaging materials that can recycle old paper using only paper as the plastic film is peeled off after 寫).

Furthermore, since the plastic film is not attached, not only the recycling of paper packaging is possible,

Through UV offset printing using PVC ink, Acryl ink, PET ink, PP ink, UV offset ink, etc., perfect printability and print bonding power can be secured.

Polyurethane resin with an elongation of 100% or more is used, so it is easy for full-scale transfer work.

Because abrasion-resistant acrylic resin is used, there is almost no problem of surface scratches that occur during the packaging material manufacturing process and handling of packaging materials and the problem of the transfer layer falling from the edges when the packaging material is folded.

Since the hardened colored coating film blocks external influences, it is possible to prevent penetration of moisture, etc. from the outside after paper transfer.

Various colors can be realized by mixing various dyes with the coloring solution.

It is possible to realize high-quality packaging materials with the luster effect of the metal deposition layer,

It is possible to prevent corrosion of the metal deposition layer due to moisture in the paper layer, which is the adherend, so that the paper packaging material can be distributed for a long time.

1 is a representative configuration diagram of a stamping foil product according to an embodiment.

Hereinafter, the present invention will be described in more detail through examples. However, the following examples are only for clearly illustrating the technical features of the present invention, and do not limit the protection scope of the present invention.

Example 1: Manufacture of stamping foil with polyurethane-based release layer applied

To prepare a stamping foil specimen, various release agents (OP wax, PE wax, Cellulose Acetate, Cellulose Acetate Butylate, Methyl Methacrylate, Polyurethane) were mixed with a solvent and applied to the PET base film, respectively. In the case of a polyurethane-based release agent, a polyurethane-based resin having an elongation of 100% or more was used, and a dry coating amount of 0.4 g/m 2 was applied.

After application of the release agent, a coating layer for preventing moisture penetration was formed by using a coating solution mixed with a gold dye as a colorant by an isocyanate curing method. Then, vacuum deposition was carried out with aluminum. To form a thick film protective layer, 5 wt% of acrylic resin, 2 wt% of vinyl resin, and 93 wt% of solvent were mixed and applied. After laminating with paper using polysol, the plastic base film was peeled off.

After peeling, it was printed with UV offset ink on each release layer exposed on the surface.

Sample production (removing the film after transferring the stamping foil to the paper) UV offset ink printing bonding strength OP wax / coloring / vapor deposition / protection / polysol / paper none at all PE wax / coloring / vapor deposition / protection / polysol / paper none at all Cellulose Acetate / Coloring / Vapor Deposition / Protection / Polysol / Paper none at all Cellulose Acetate Butylate / Coloring / Deposition / Protection / Polysol / Paper none at all Methyl Methacrylate / Coloring / Vapor Deposition / Protection / Polysol / Paper none at all Polyurethane / Coloring / Vapor Deposition / Protection / Polysol / Paper Good

After UV offset ink was printed, ink bonding strength was checked with various tapes (Scatch Tape, OPP packaging tape) on the printing surface. As a result, it was confirmed that only samples using polyurethane release agent had strong printing bonding strength with UV offset ink (Table). One).

In addition, after printing using various inks (PVC ink, Acryl ink, PET ink, PP ink) on the polyurethane release layer, the printing bonding strength was checked in the same manner as above, and it was confirmed that all had strong bonding strength.

Example 2: Manufacture of stamping foil with abrasion-resistant layer applied to the lower part of the polyurethane-based release layer

After applying the polyurethane release agent, as a wear-resistant layer, a resin coating solution mixed with 17wt% of polymethyl methacrylate (PMMA), 3.5wt% of ethene homopolymer, and 79.5% of solvent was dried with an amount of 1.0 After coating so as to be g/m 2 , whether the surface was scratched was compared with the samples without the abrasion-resistant layer prepared in Example 1.

Sample production (removing the film after transferring the stamping foil to the paper) Whether the surface is scratched OP wax / coloring / vapor deposition / protection / polysol / paper surface scratches PE wax / coloring / vapor deposition / protection / polysol / paper surface scratches Cellulose Acetate / Coloring / Vapor Deposition / Protection / Polysol / Paper surface scratches Cellulose Acetate Buthylate / Coloring / Deposition / Protection / Polysol / Paper surface scratches Methyl Methacrylate / Coloring / Vapor Deposition / Protection / Polysol / Paper surface scratches Polyurethane / Coloring / Vapor Deposition / Protection / Polysol / Paper surface scratches Polyurethane / Wear-resistant layer application / Coloring / Vapor deposition / Protection / Polysol / Paper No surface scratches

Surface scratches were evaluated by scratching 2 to 5 times with a nail on the surface release layer after transfer. In addition, as a result of rubbing 70 times per minute under a load of 500g using an abrasion resistance measuring instrument, it was confirmed that there was no scratching phenomenon in the sample even after rubbing more than 5000 times.

Only when a wear-resistant layer was applied to the lower portion of the polyurethane-based release layer, there was no surface scratching or falling of the edge transfer layer when folded.

Example 3: under the metal deposition layer Manufacture of stamping foil with thick protective layer applied

A polyurethane-based release layer was formed by applying a coating solution containing a polyurethane-based resin having an elongation of 100% or more to a PET base film so as to have a dry coating amount of 0.4 g/m 2 .

As a wear-resistant layer, a resin coating solution mixed with 17wt% of polymethyl methacrylate (PMMA), 3.5wt% of ethene homopolymer, and 79.5% of solvent was applied so that the dry coating amount was 1.0g/m2. .

Then, a coating solution containing 1.2 wt% of a gold dye as a colorant is applied so that the dry application amount is 1.2 g/m 2 and dried for about 8 seconds at a drying temperature of 190° C. so that the colored layer is cured at a high temperature by an isocyanate curing method, A colored layer was formed without moisture penetration prevention and metal deposition change.

Then, aluminum (Aluminium) was vacuum-deposited to form a metal deposition layer. To form a thick protective layer on the metal deposition layer, a coating solution in which 5 wt% of an acrylic resin, 2 wt% of a vinyl resin, and 93 wt% of a solvent were mixed was applied so that the dry coating amount was 0.5 g/m 2 . After laminating with paper using polysol, the PET base film was peeled off.

After transferring to paper, using a thermo-hygrostat, it was left at a humidity of 80% and a temperature of 24° C. for 6 months to conduct thermo-hygrostat evaluation.

The results of checking whether the paper transfer surface was changed are shown in Table 3 below.

Sample production (removing the film after transferring the stamping foil to the paper) Changes in the surface of the packaging material Polyurethane / Wear-resistant layer application / Coloring / Vapor deposition / Polysol / Paper Black spots appear after 3 months Polyurethane / Wear-resistant layer application / Coloring / Vapor deposition / Protection / Polysol / Paper No change until 6 months

When the thick film protective layer was applied, there was no change in the surface of the packaging material even after 6 months.

In the sample that was vacuum-deposited but not coated with a thick protective layer, black spots like mold started to appear after 3 months.

Example 4: Setting of dry application amount of each application layer

The stamping foil product composition was selected as a polyurethane release layer, abrasion-resistant acrylic abrasion-resistant layer, isocyanate colored layer, aluminum deposition layer, and thick film protective layer on PET film.

1. Polyurethane release layer

Polyurethane layer dry application amount Post-war results 0.08g/㎡ Partial tearing after film peeling 1.20g/㎡ After the film is peeled off, some transfer pieces are mixed

It was suitable to apply so that the dry coating amount of the polyurethane-based release layer was 0.1 to 1.0 g/m 2 .

2. Wear-resistant acrylic-based wear-resistant layer

(1) When mixing methyl methacrylate 17wt% and ethene homopolymer 3.5wt%

Wear-resistant layer dry application amount Nail Scratch Results Result of transfer layer falling when folded 0.30g/㎡ Some scratches No drop of transfer layer 2.50g/㎡ no scratches Some transfer layers have fallen

It was appropriate to apply so that the dry coating amount of the abrasion-resistant layer was 0.4 to 2 g/m 2 .

(2) Difference between methyl methacrylate (MA) and ethene homopolymer (EH) ratio

MA to EH weight ratio Wear-resistant layer dry application amount Nail Scratch Results 17: 1.5 1.0g/㎡ Some scratches 17:4.5 1.0g/㎡ Polyurethane release layer and part

It is appropriate to apply 0.4~2.0g/m2 of resin mixed with 17wt% of acrylic resin Methyl Methacrylate and 2~4wt% of Ethene Homopolymer as abrasion resistant layer.

3. Selection of colored layers

Colored layer hardening method Heat-resistant temperature after deposition Isocyanate curing 180℃ Melamine curing 160℃ Blocked isocyanate curing 150℃

When the colored layer is formed by applying the isocyanate curing method, it is advantageous in terms of heat resistance temperature after metal deposition.

4. Metallization layer

Aluminum (Al) is economical and can be implemented in various colors, so it is advantageous in vacuum deposition.

5. Acryl-based resin and vinyl-based mixing ratio as a thick film protective layer

Acrylic and vinyl-based mixing ratio (wt) dry application amount result 5:1 0.5g/m2 Decreased bonding strength 5:4 0.5g/m2 faster water penetration

For the thick film protective layer, it was appropriate to apply a dry coating amount of 0.5 g/m 2 in a weight ratio of acrylic resin 5 and vinyl resin 2.

Example 5: Stamping Foil Standard Product Manufacturing (Production) Method

If a second coater is used when manufacturing a stamping foil product, the process of applying and drying a release agent to the plastic film and then applying and drying an abrasion resistant agent on the same surface can be performed simultaneously.

For the plastic substrate film, 16 μm of PET Film (SF-100, Hwaseung Industries, Ltd.) was used.

When the first release agent was applied, a solution of 4 wt% of polyurethane release agent and 96 wt% of solvent was mixed with a 210 mesh gravure roll so that the dry coating amount was 0.4 g/m 2 . When the release agent was applied, 4 sections of the drying furnace, each 2 m in length, were maintained at 100, 100, 110, and 110 °C, and the production speed was set to 120 m/min.

In the second application of the anti-wear agent, a solution of 17 wt% of methyl methacrylate, 3.5 wt% of ethene homopolymer, and 79.5 wt% of solvent was mixed with a 210 mesh gravure roll so that the dry coating amount was 1.0 g/m 2 . When applying the anti-wear agent, the 6 sections of the drying furnace, each 2 m in length, were maintained at 100, 130, 140, 150, 130, and 100 ° C.

When applying the colorant, the drying furnace proceeded to a drying furnace with 6 sections. After preparing a solution in which 1.2wt% of a gold dye was mixed with an isocyanate curing solution, a 210 mesh gravure roll was used so that the dry application amount was 1.2g/m2. was applied. When the colorant was applied, the 6 sections of the drying furnace, each 2 m in length, were maintained at 110, 140, 150, 170, 190, and 100° C., and the production speed was 120 m/min.

After forming the colored layer, it was vacuum-deposited with aluminum (Al). At this time, the deposition thickness was maintained to be 2.4 with an optical density meter.

When applying the thick film protectant, it was carried out in a drying furnace with 6 sections of drying furnace, and after preparing a solution in which 5 wt% of acrylic resin, 2 wt% of vinyl resin, and 93 wt% of solvent were mixed, the dry coating amount of 210 mesh gravure roll was 0.5 g/m applied as much as possible. At this time, the thick film protectant was maintained at 90, 90, 100, 120, and 100°C in 6 sections of the drying furnace, each 2 m in length, and the production rate was 120 m/min.

Claims (15)

a base film to be removed after stamping transfer;
a polyurethane-based release layer formed on the base film;
an abrasion-resistant layer containing an acrylic matrix resin and an ethene-based polymer additive formed on the polyurethane-based release layer;
A cured moisture penetration prevention and metal deposition heat-resistant coating layer formed on the wear-resistant layer;
a metal deposition layer formed on the cured coating layer; and
Optionally (optionally) a metal deposition layer formed on the metal deposition layer corrosion prevention protective layer
stamping foil with The stamping foil according to claim 1, wherein the dry coating amount of the wear-resistant layer is 0.4 to 2 g/m 2 . The stamping foil according to claim 1, wherein the wear-resistant layer is formed by applying a coating solution containing 16 to 18 wt% of an acrylic resin, 3 to 5 wt% of an ethene-based polymer, and 77 to 81 wt% of a solvent. The method of claim 1, wherein in order to prevent corrosion of the metal deposition layer, an acrylic resin and a vinyl resin having a metal binding force are mixed with a solvent as a thick film protective layer, and the dry coating amount is 0.2 to 1.2 g/m2 Stamping foil characterized by application in a range. The stamping foil according to claim 1, wherein printing is possible on the exposed surface of the release layer after transferring the stamping foil onto the adherend and removing the base film. The stamping foil according to claim 1, wherein the release layer exposed after transferring the stamping foil and removing the base film on the adherend is coated with a polyurethane-based resin having printability and an elongation of 100% or more with front transfer characteristics. The stamping foil according to claim 1, wherein the dry application amount of the polyurethane-based release layer is 0.1 to 1 g/m 2 . The stamping foil according to claim 1, wherein the base film to be removed after stamping transfer is a polyethylene terephthalate (PET) film and a biaxially oriented polypropylene (BOPP) film. The stamping foil according to claim 1, wherein the moisture permeation prevention and metal deposition heat-resistant coating layer is formed by mixing a dye for realizing a color in the coating solution to form a colored layer. The stamping foil of claim 1, wherein the metal deposition layer is formed by vacuum-depositing a metal selected from the group consisting of aluminum (Al), nickel (Ni), chromium (Cr), silver (Ag) and copper (Cu). . The stamping foil according to any one of claims 1 to 10, characterized in that it is a stamping foil for paper transfer. A first step of (i) applying an adhesive layer to the stamping foil or using the stamping foil having the adhesive layer formed thereon, and/or (ii) applying the adhesive layer to the entire surface or part of the adherend;
a second step of stamping and transferring the stamping foil to the adherend;
a third step of removing the base film of the stamping foil; and
4th step of printing on the surface of the release layer exposed by optionally removing the base film
In the manufacturing method of the adherend to which the stamping foil is applied,
A method of manufacturing an adherend to which a stamping foil is applied, characterized in that the stamping foil according to any one of claims 1 to 10 is used. The method according to claim 12, wherein the adherend is paper, the stamping foil is for paper transfer, and when the paper packaging material from which the plastic film is removed after the stamping foil transfer is discarded, it can be recycled as a raw material through a pulper treatment. A method of manufacturing an adherend to which a stamping foil is applied. The method of claim 12, wherein the adherend is a paper product or a wood product, and the adherend printed through the stamping foil is recyclable. [13] The method of claim 12, wherein the printing in the fourth step is performed using PVC ink, Acryl ink, PET ink, PP ink, or UV offset ink.

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