KR102033487B1 - Ink composition and interior film using the same - Google Patents

Abstract

The present invention can implement a metal texture, such as a metal deposition layer, solves the oxidation problem of the metal deposition layer and at the same time improved the processability, productivity and economics, the ink composition for gravure printing ink composition containing the conductive metal particles and binder resin and the same It relates to the used interior film.

Description

Ink composition and interior film using the same {INK COMPOSITION AND INTERIOR FILM USING THE SAME}

The present invention relates to an ink composition and an interior film using the same.

Various interior films having a metal texture have been developed, and such interior films are generally formed by depositing a metal such as aluminum (Al) under vacuum or similar conditions as disclosed in Korean Patent No. 10-1268403. . However, when the metal deposition layer is provided as described above, the metal texture of the appearance is excellent, but there is a problem in that oxidation problems (alkali, brine, etc.) of the metal deposition layer are caused. In addition, there is a disadvantage in that the process cost is high when forming the metal deposition layer.

Meanwhile, the conventional interior film has a structure of UV imprint / fabric film (PET) / UV imprint / UV (metal) Al deposition layer / adhesive layer / PVC layer. In order to manufacture the above-mentioned interior film, the first step of forming a UV imprint layer on the PET film, the second step of forming an aluminum (Al) deposition layer and the third step of laminating an adhesive or PVC layer on the metal deposition layer Since the process is necessary, the manufacturing process is complicated and problems such as economical efficiency and productivity decrease.

The present invention can implement a gravure printing ink composition containing a binder and conductive metal particles, to implement a metal texture, to solve the problem of oxidation of the metal deposition layer, and to improve the processability and productivity and the gravure printing ink composition It provides an interior film comprising a metal printing layer formed from.

The present invention includes a first solution containing a cellulose-based binder resin, a second solution containing a conductive metal particle and a solvent, wherein the mixing ratio of the first solution, the second solution and the solvent is 100: 10-20: 40-. It provides a gravure printing ink composition consisting of 60 weight ratio.

In another aspect, the present invention provides an interior film having a metal printing layer formed using the above-described gravure printing ink composition.

In addition, the present invention includes a steel sheet and an interior film, and provides a steel sheet with interior film in which one surface of the steel sheet and the hot melt adhesive layer of the interior film are integrally bonded by thermocompression bonding.

In the present invention, instead of the expensive metallic ink, by providing a metal printing layer formed using an ink composition containing conductive metal particles and a resin binder that imparts viscosity and adhesion, as one configuration of the interior film, a metal texture such as a metal deposition layer It can be implemented, and at the same time it can improve the appearance problem due to the oxidation of the conventional metal deposition layer.

In addition, in the present invention, after manufacturing the semi-finished product with the UV imprint layer formed on the transparent film, it is possible to freely form a coating layer of the desired components and the number of layers through a continuous in-line process using a gravure printing machine on the semi-finished product. have. Accordingly, a separate deposition and lamination process is not necessary, and the conventional three-step manufacturing process of the interior film can be simplified to a two-step process, thereby enabling mass production and significantly reducing the manufacturing cost.

In addition, in the present invention, it is possible to enhance the interlayer adhesion by using a polyester of specific physical properties as a component of the adhesive layer provided in the interior film.

1 is a cross-sectional structural view showing the configuration of an interior film according to an embodiment of the present invention.
2 is a cross-sectional structural view showing the configuration of an interior film according to another embodiment of the present invention.
3 is a cross-sectional structural view showing a configuration of an interior film according to another embodiment of the present invention.
Figure 4 is a cross-sectional structural view showing the configuration of the interior film according to another embodiment of the present invention.
5 is a cross-sectional structural view showing the configuration of an interior film according to another embodiment of the present invention.
6 is a cross-sectional structural view showing the configuration of an interior film according to another embodiment of the present invention.
7 is a schematic diagram showing an imprint process during the manufacturing process of the interior film according to the present invention.
8 is a schematic diagram showing an in-line gravure printing process in the manufacturing process of the interior film according to the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail. However, the present invention is not limited only to the following contents, and each component may be variously modified or optionally mixed as necessary. Therefore, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

For reference, in the present specification, the expression such as "B formed on the top (or bottom) of A" or "B formed on A", or the like, when B is directly attached to the top or bottom of A, the top or bottom of A When B is attached via an adhesive layer or an adhesive layer, or when forming one or more separate layers on the top or bottom of A, and directly attached B to the separate layer or through an adhesive or pressure-sensitive adhesive, etc. Is used to encompass all of them.

<Ink composition for gravure printing>

Gravure printing has the advantage of being able to express vivid and various patterns and mass production through high speed and continuous printing. The ink composition used for such gravure printing should have low viscosity and fluidity. The ink composition according to the present invention contains conductive metal particles, a binder resin and a solvent, and has a low viscosity capable of gravure printing.

In the present invention, the conductive metal particles are used as the main component of the ink for forming the metal printing layer provided in the interior film. The conductive metal particle is not particularly limited as long as it is a conventional electrically conductive metal component in the art capable of forming a uniform metal print layer through gravure printing. For example, it may be at least one selected from the group consisting of aluminum (Al), copper (Cu), silver (Ag), gold (Au), nickel (Ni), platinum (Pt), and palladium (Pd).

The size or shape of the conductive metal particles is not particularly limited. For example, the average particle diameter of the conductive metal particles may be 50 μm or less, and in another example, may be in the range of 1 nm to 50 μm, and in another example, 10 nm to 10 μm. When the conductive metal particles have the aforementioned average particle diameter, a uniform and fine printed layer may be uniformly formed through the gravure printing method. In addition, the conductive metal particles may be spherical, plate-like, acicular or amorphous, or two or more of the above-described forms may be used.

In the present invention, the binder resin serves to impart proper viscosity and adhesion to the ink composition. The binder resin may use a conventional cellulose binder known in the art. For example, the cellulose-based binder may have a number average molecular weight (Mn) of 3,000-20,000, a glass transition temperature (T _g ) of 10-90 ° C, and a melting temperature (T _m ) of 120-200 ° C.

Non-limiting examples of cellulose binders that can be used include methyl cellulose, ethyl cellulose, propyl cellulose, nitrocellulose, cellulose acetate, cellulose propionate, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl hydroxypropyl cellulose, cellulose acetate butyl Rate or a mixture of two or more thereof.

The present invention can realize a metal texture such as a metal deposition layer (eg, an aluminum deposition layer) through the use of a binder resin that gives a leveling, viscosity and adhesion of pigment and silver powder without using expensive metallic ink. .

In addition to the cellulose-based binder resins described above, in the present invention, conventional binder resins known in the art include epoxy, acrylic, vinyl chloride, vinyl acetate, polyvinyl alcohol, polyurethane, and polyester-based binder resins. It can mix and use 1 or more types.

In the present invention, the solvent serves to have the ink composition has a low viscosity capable of gravure printing. The solvent may be used by appropriately selecting a conventional organic solvent known in the art in consideration of the manufacturing conditions (calcination temperature, firing time, etc.) of the gravure ink. For example, it may be an alcohol, ketone, acetate, carbonate solvent, or a mixture of two or more thereof.

The gravure printing ink composition described above may further include conventional additives known in the art. Non-limiting examples of additives that can be used include plasticizers, thickeners, stabilizers, dispersants, defoamers, pigments, surfactants, leveling agents, reducing agents, wetting agents, coupling agents or two of these. It may be abnormal. The amount of such additives to be used can be appropriately adjusted within conventional ranges in the art.

The gravure printing ink composition according to the present invention may be prepared by mixing and stirring conductive metal particles, a cellulose-based binder resin, a solvent, and other additives blended as necessary according to conventional methods known in the art. For example, the first solution containing the cellulose-based binder resin, the second solution containing the conductive metal particles, and a solvent may be added at a specific blending ratio, and then uniformly mixed with a blender or a mixer.

According to one embodiment of the present invention, the mixing ratio of the first solution containing the cellulose-based binder resin, the second solution containing the conductive metal particles and the solvent may be a weight ratio of 100: 10-20: 40-60, as another example It may be 100: 12-18: 45-55 weight ratio.

The first solution may be a composition including 10-20 parts by weight of cellulose-based binder resin and a residual amount of solvent that satisfies 100 parts by weight of the first solution, and for example, a cellulose-based binder resin (eg, cellulose acetate butyl). 10-15 parts by weight, 20-30 parts by weight of a carbonate solvent (eg, dimethyl carbonate), 30-40 parts by weight of ketone, 10-15 parts by weight of acetone, 10-15 parts by weight of an acetate solvent (eg, butyl acetate) Parts and 1-5 parts by weight of an alcoholic solvent (eg, isopropyl alcohol).

The second solution may be a composition including 8-15 parts by weight of conductive metal particles and a residual amount of solvent (eg, an acetate solvent) that satisfies 100 parts by weight of the second solution. For example, conductive metal particles (eg, , Aluminum powder) 8-12 parts by weight, 75-85 parts by weight of ethyl acetate and 5-15 parts by weight of isopropyl acetate.

The gravure printing ink composition of the present invention configured as described above, the viscosity at 25 ° C may be, for example, 100-1,000cps, another example may be 200-500cps. By adjusting the viscosity in an appropriate range, it is possible to impart a flowability suitable for producing a metal printed layer through gravure printing and to suppress a residual film.

<Interior film>

The present invention provides an interior film having a metal printing layer formed by gravure printing the ink composition described above. The interior film is disposed on the transparent film, at least one imprint layer formed on one or both surfaces of the transparent film, and on the other surface of the imprint layer or the transparent film (the surface on which no imprint layer is formed), and the above-described ink. It comprises a at least one metal printing layer formed by gravure printing the composition.

1 to 6 are diagrams schematically showing the cross-sectional structure of the interior film according to an embodiment of the present invention, respectively. Hereinafter, each component of the interior film will be described in detail with reference to the accompanying drawings.

<Transparent Film>

In the present invention, the transparent film 10 is disposed on the surface side of the interior film 100, a film forming a substrate (substrate).

The transparent film is a conventional plastic film known in the art, it can be used without limitation those having transparency. Non-limiting examples of the transparent film materials that can be used include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene (PE), poly vinyl chloride (PVC), poly methyl methacrylate (PMMA), and ABS ( It may be acrylonitrile-butadiene-styrene (PC), polycarbonate (PC), styrene-acrylonitrile copolymer (SAN), or a mixture thereof. For example, a PET material having excellent uniformity and transparency can be used, and in this case, the stereoscopic pattern effect of the imprint layer formed on the upper portion and the metal luminance of the metal printed layer formed on the lower portion can be more clearly expressed.

The transparent film may have a haze value of less than 10%. When the haze value of the transparent film is more than 10%, the metal printed layer is not clearly visible to the interior film appearance, the metallic appearance characteristics of the interior film may be inhibited.

In the present invention, the thickness of the transparent film is not particularly limited and may be appropriately adjusted within a range known in the art. In one example, it may be 20-120㎛, another example may be 25-100㎛. When the thickness of the transparent film is out of the above-described range, the interior film may be damaged or appearance characteristics may be deteriorated because it may not serve as a substrate and may not support the metal print layer.

<Imprint layer>

In the present invention, imprint layers 11, 11a, and 11b having surface three-dimensional patterns implemented on one or both surfaces of the transparent film 10 are formed.

The imprint layers 11, 11a, 11b may be manufactured by conventional methods known in the art. For example, it may be formed by imprinting an ultraviolet (UV) curable resin composition applied on the transparent film 10 with a molding roller (not shown) having a three-dimensional pattern formed thereon, followed by ultraviolet curing. Alternatively, two imprint film layers having a three-dimensional pattern already formed may be attached onto one or both surfaces of the transparent film 10.

The shape of the surface three-dimensional pattern is not particularly limited, for example, circular or polygonal pattern, cylinder or polygonal pattern, grid pattern, stripe pattern, dot pattern, mosaic pattern, dobby pattern, floral pattern, such as floral pattern, It may be a three-dimensional pattern in which a pattern of any one selected from among various animal patterns, character patterns, and 3D three-dimensional patterns thereof or a combination thereof is implemented. The three-dimensional pattern may be formed to a depth of 0.5-20㎛, if there is a fear that the diffuse reflection effect is lowered if it exceeds the above range.

The thickness of the imprint layers 11, 11a and 11b is not particularly limited and may be appropriately adjusted within a conventional range known in the art. For example, it may be in the range of 2-50 μm, and in another example, 3-30 μm.

In the present invention, the composition of the ultraviolet (UV) curable resin composition constituting the imprint layer (11, 11a, 11b) is not particularly limited, for example, additives that complement acrylate oligomers, monomers, photoinitiators and other physical properties Include.

The acrylic oligomer may be one selected from urethane, epoxy, ester, ether or silicone. For example, polyurethane acrylates prepared by reacting diisocyanates, polyols and methacrylates can be used.

As the photoinitiator, a conventional one in the art may be used without limitation. For example, a photoinitiator such as Irgacure 184 may be used, and a light stabilizer such as Tinuvin 400 may be mixed.

The ultraviolet curable resin composition may further include a pigment for a conventional UV resin in the art as needed.

Metal Printing Layer

In the interior film 100 according to the present invention, the metal print layer 12 is formed on the other surface of the transparent film 10 (the surface on which the imprint layer is not formed) or on the imprint layers 11, 11a, and 11b. .

The metal printed layer 12 is provided to express a metal base material (not shown), for example, a metal texture different from a steel plate, and is a layer applied for the purpose of giving a metal texture and a beautiful and unique color.

In the present invention, the metal printing layer 12 may be formed using a conventional metal known in the art. For example, it may be aluminum (Al), copper (Cu), silver (Ag), gold (Au), nickel (Ni), platinum (Pt), palladium (Pd), or a combination thereof. Depending on the metal texture effect to be implemented, it may be variously modified with two or more alloys or metal oxides of the above-described components.

The metal printing layer 12 is formed through the gravure printing method using the ink composition described above, the thickness thereof is not particularly limited. For example, it may be a thickness of 100nm to 100㎛, another example may be in the range of 1-50㎛.

The metal print layer 12 may be a single metal print layer or a multilayer metal print layer. When the metal print layer 12 is formed in a multi-layer, it is possible to produce a more luxurious appearance than when forming a single layer through the thickness and color control of each layer, it is possible to implement a variety of colors and metal texture of high brightness.

<Hot Melt Adhesive Layer>

The interior film 100 according to the present invention may further include a hot melt adhesive layer 14 on the other surface (the surface on which the imprint layer and the transparent film are not formed) of the metal printing layer 12. The hot melt adhesive layer 14 is melted by heat to provide excellent adhesion between the lower steel sheet (not shown) and the interior film 100.

In the present invention, the hot melt adhesive layer 14 may be formed by using a hot melt type adhesive conventional in the art, without limitation, the adhesive is made by heat and pressure. In one example, it may be formed using an adhesive composition comprising a polyester resin, a copolymer of vinyl chloride and vinyl acetate, a curing agent and a solvent.

As an example of the said polyester resin, the polyester resin whose number average molecular weight is 7,000-35,000 and glass transition temperature (Tg) is 10-80 degreeC can be used.

The copolymer of vinyl chloride and vinyl acetate may be polyvinyl chloride acetate (PVC). However, this is not particularly limited.

In the present invention, the thickness of the hot melt adhesive layer 14 is not particularly limited, and may be, for example, 10-80 μm. When the thickness of the hot melt adhesive layer is out of the above-described range, there is a fear that the adhesive force between the steel sheet and the interior film is not sufficient, so that the hot melt adhesive layer may be easily peeled off, and the hardness may be too high, resulting in deterioration of the workability of the steel sheet with interior film.

<Color Printing Layer>

The interior film 100 according to the present invention may further include a coloring printing layer 13 as necessary. The coloring layer 13 may not only realize various colors but also increase aesthetics of the steel sheet with an interior film.

The colored print layer 13 has a predetermined color or pattern, and the color and / or pattern is not particularly limited, and may be appropriately adapted to the intended use or the needs of the user. The thickness of the coloring layer 13 is not particularly limited, and may be, for example, 10-50 μm.

<UV Hard Coating Layer>

The interior film 100 according to the present invention may further include a UV hard coating layer (not shown) as necessary. The UV hard coating layer is to protect the surface of the film from the external environment, to prevent surface scratches or contamination, and may be formed by UV curing or thermosetting after coating with a gravure coating method with an ultraviolet curable resin composition or a thermosetting resin composition. have.

The UV curable resin composition or thermosetting resin composition may be acrylic, acrylic urethane, epoxy, polyurethane, polyisocyanate, polyester, acrylate, ethylene-vinyl acetate copolymer, polyamide, melamine, or synthetic. Rubber-based, polyvinyl alcohol-based resins and the like can be used, and further include an inorganic filler to improve the strength and mechanical properties.

The thickness of the UV hard coating layer is not particularly limited, and may be, for example, 1-30 μm. If it is out of the thickness range, the scratch prevention effect may be insignificant or a cost increase problem may occur.

The interior film of this invention including the structure mentioned above can have six following embodiments. However, the present invention is not limited to the embodiments illustrated below, and various modifications and applications are possible as necessary.

For reference, the interior film may be classified into a single-sided type or a double-sided type according to the number of imprint layers disposed based on the transparent film as the base layer, and may also be classified into a single-sided internal type according to a position where the imprint layer is disposed. It can be divided into inner or single-outer.

1 is a cross-sectional view showing a first embodiment of the interior film 100 according to the present invention. The interior film 100 includes a transparent film 10, a first imprint layer 11a formed on an upper surface of the transparent film 10, and a second imprint sequentially formed on a lower surface of the transparent film 10. It is a double-sided structure including the layer 11b and the metal printing layer 12.

The first imprint layer 11a formed on the upper surface of the transparent film 10 should have flexibility and hard characteristics at the same time, between the transparent film 10 and the metal printing layer 12. The second imprint layer 11b to be disposed is appropriately adjusted to have not only the two physical properties described above but also physical properties that can further improve the interlayer adhesion.

2 is a cross-sectional view showing a second embodiment of the interior film 200 according to the present invention. The interior film 200 includes a transparent film 10, a first imprint layer 11a formed on an upper surface of the transparent film 10, and a second imprint sequentially formed on a lower surface of the transparent film 10. It is a double-sided structure including a layer 11b, a metal printing layer 12 and a hot melt adhesive layer 14.

3 is a cross-sectional view showing a third embodiment of the interior film 300 according to the present invention. The interior film 300 is a transparent film 10, the imprint layer 11 formed on the upper surface of the transparent film 10, the metal printed layer 12 formed sequentially on the lower surface of the transparent film 10 And a single melt-outer structure including a hot melt adhesive layer 14.

4 is a cross-sectional view showing a fourth embodiment of the interior film 400 according to the present invention. The interior film 400 includes a transparent film 10, a cross section including an imprint layer 11, a metal printing layer 12, and a hot melt adhesive layer 14 sequentially formed on a lower surface of the transparent film 10. It is a single-inner structure. In this case, the transparent film 10 may further include a UV hard coating layer (not shown) formed on the upper surface.

5 is a cross-sectional view showing a fifth embodiment of the interior film 500 according to the present invention. The interior film 500 includes a transparent film 10, a first imprint layer 11a formed on an upper surface of the transparent film 10, and a second imprint sequentially formed on a lower surface of the transparent film 10. It is a double-sided structure including a layer 11b, a metal printing layer 12, a coloring printing layer 13 and a hot melt adhesive layer 14.

6 is a cross-sectional view showing a sixth embodiment of the interior film 600 according to the present invention. The interior film 600 may be a transparent film 10, a first imprint layer 11a formed on an upper surface of the transparent film 10, and a second imprint sequentially formed on a lower surface of the transparent film 10. It is a double-sided structure including the layer 11b, the metal printing layers 12a and 12b, the colored printing layer 13, the metal printing layer 12c and the hot melt adhesive layer 14.

The structure of the interior film of the present invention is not particularly limited to the above-described structure, it is also within the scope of the present invention to freely select and configure the number and lamination order of the coating layer constituting the interior film according to the application. For example, the order of the above-described coating layers may be changed, the above-described coating layers may be alternately stacked, or other conventional coating layers may be introduced to have a composite layer structure.

<Method for producing interior film>

The manufacturing method of the interior film which concerns on one Embodiment of this invention is demonstrated. However, it is not limited only by the following manufacturing method, and the steps of each process may be modified or optionally mixed as necessary.

The interior film of the present invention is a first step of manufacturing a semi-finished product with a UV imprint layer formed on a transparent film and a second step of continuously manufacturing at least one or more heterogeneous printed layers using a gravure printing machine on the semi-finished product. It can be prepared through.

For example, the first process may be performed through the imprint process illustrated in FIG. 7, and the second process may be performed through the gravure printing process illustrated in FIG. 8. The printing process in the second process is an in-line process in which painting and drying are continuously performed in one coating line, so that no separate deposition or lamination process itself is required, and the number of ink compositions disposed on the coating line By simply changing the composition, the number of layers of the interior film to be manufactured and the composition of the coating layer can be freely modified.

For example, the method of manufacturing the interior film includes (i) preparing a semi-finished product having a UV imprint layer formed on one or both surfaces of the transparent film, and (ii) using the gravure printing machine, converting the semi-finished product into an ink composition for gravure printing. Coating and drying to form a metal printing layer, and (iii) using a gravure printing machine, coating and drying the semi-finished product on which the metal printing layer is formed with a hot melt adhesive composition to form a hot melt adhesive layer. .

If necessary, the present invention further comprises the steps of (ii) and (iii), using a gravure printing machine, coating and drying the semi-finished product on which the metal printing layer is formed with a coloring composition to form a coloring layer. can do.

<Steel plate with interior film>

The present invention includes a steel sheet and an interior film, and provides a steel sheet with an interior film in which the hot melt adhesive layer of the steel sheet and the interior film is integrally bonded by thermocompression bonding.

The interior film may be applied to all three embodiments described above, namely, a double-sided shape, a cross-sectional external shape, and a single-sided internal shape.

The steel sheet is a metal base material that is the object to which the above-described interior film is bonded, and may be used without limitation, a metal plate used as a home appliance, an industrial, building interior material, and / or building exterior material in the art. Specific examples thereof include cold rolled steel (CR), zinc hot dipping steel (GI), electro-zinc steel (EGI), alloy-plate steel (GA), copper sheet, tin-plate steel, hot-dip galvanized steel sheet, alloying Hot-dip galvanized steel sheet, electro-galvanized steel sheet, hot-dip aluminum-zinc alloy plated steel sheet or aluminum sheet may be used.

The steel sheet with interior film according to the present invention can be produced according to a conventional method in the art. For example, the hot melt adhesive layer of the steel sheet and the above-described interior film may be arranged to contact each other, and then may be manufactured by pressing the hot melt adhesive layer under a temperature and pressure condition in which the hot melt adhesive layer may be hot melted.

In one example, prior to pressing the interior film on a steel sheet, the steel sheet may be preheated to a temperature of, for example, 80 ℃ or more, 80-200 ℃ other examples. Means applicable to the preheating of the steel sheet is not particularly limited as long as it is a heating device that can control the temperature, for example, IR heater (Infrared Ray Heater), steam heating roll, electric heating roll (electric heating roll) using infrared rays It may be a device capable of controlling a heat source such as a roll).

The steel sheet with interior film configured as described above can be applied to various uses. For example, it may be a home appliance exterior material, interior and exterior interior products, decorative finishing materials such as furniture.

Hereinafter, the present invention will be described in more detail with reference to Examples. However, the following examples are only intended to help the understanding of the present invention, but the scope of the present invention in any sense is not limited to the examples.

[ EXAMPLE  One. Gravure  Preparation of Printing Ink Composition]

Specifications and compositions of the raw materials constituting the gravure printing ink composition of the present invention are shown in Table 1 below. According to the composition shown in Table 1 below, a medium for aluminum (Al) paste (first solution), an aluminum (Al) paste (second solution), and a solvent were prepared, respectively, and these were combined in a weight ratio of 100: 15: 50. By stirring, the ink composition for gravure printing of Example 1 was prepared.

1) Cellulose acetate butyrate: number average molecular weight 16,000, Tg 85 ℃, melting temperature 135 ℃

2) Aluminum (Al) powder: plate-shaped, average size 12㎛, thickness 40nm

[ EXAMPLE  2. Metal Printed layer  Manufacturing interior film to have]

An ultraviolet curable urethane acrylate resin composition was applied on one surface of a transparent polyethylene terephthalate (PET) film having a thickness of 30 μm to a thickness of 10 μm to form a coating film, and an imprint process was performed on the coating film to form an imprint layer. Thereafter, an ultraviolet curable urethane acrylate resin composition was applied to the other surface of the transparent PET film to form a coating film, and an imprint process was performed to prepare a semi-finished product having a double-sided imprint layer formed thereon. The manufacturing process of the double-sided imprint carried out above is as shown in FIG.

The semi-finished product having the double-sided imprint layer formed thereon was sequentially coated with a gravure printing ink composition of Example 1, a coloring composition containing polyester, vinyl chloride and urethane ink and a hot melt adhesive composition using a gravure printing machine shown in FIG. After passing through the oven, an interior film was prepared.

100, 200, 300, 400, 500, 600: Interior film
10: transparent film 11: imprint layer
11a: first imprint layer 11b: second imprint layer
12: metal printing layer 12a: first metal printing layer
12b: second metal print layer 12c: third metal print layer
13: colored printing layer 14: hot melt adhesive layer

Claims (14)

A first solution containing a cellulose binder resin, a second solution containing conductive metal particles, and a solvent,
The first solution comprises 10-20 parts by weight of cellulose-based binder resin and the remaining amount of the solvent to satisfy 100 parts by weight of the first solution, and the solvent contained in the first solution is a carbonate solvent, ketone, acetone, or acetate-based solvent. At least one selected from the group consisting of a solvent and an alcohol solvent,
The second solution comprises 8-15 parts by weight of the conductive metal particles and the remaining amount of the solvent to satisfy 100 parts by weight of the second solution, the solvent contained in the second solution is an acetate-based solvent,
The solvent is one or more selected from the group consisting of alcohol, ketone, acetate and carbonate solvents,
An ink composition for gravure printing, wherein the mixing ratio of the first solution, the second solution, and the solvent is 100: 10-20: 40-60 weight ratio. The gravure printing ink composition of claim 1, wherein the viscosity at 25 ° C. is 100-1,000 cps. The cellulose binder has a number average molecular weight (Mn) of 3,000 to 20,000, a glass transition temperature (T _g ) of 10-90 ° C, and a melting temperature (T _m ) of gravure. Printing ink composition. The method of claim 1, wherein the conductive metal particles are selected from the group consisting of aluminum (Al), copper (Cu), silver (Ag), gold (Au), nickel (Ni), platinum (Pt), and palladium (Pd). Gravure printing ink composition is one or more. The gravure printing ink composition of claim 1, wherein the conductive metal particles have an average particle diameter of 50 μm or less. delete The gravure printing ink composition of claim 1, further comprising at least one selected from the group consisting of plasticizers, thickeners, stabilizers, dispersants, defoamers, pigments, surfactants, surface leveling agents, reducing agents, wetting agents, and coupling agents. . An interior film comprising a transparent film, a first imprint layer formed on an upper surface of the transparent film, a second imprint layer and a metal print layer sequentially formed on a lower surface of the transparent film, wherein the metal printed layer is a first film. Interior film formed of the ink composition for gravure printing of claim. An interior film comprising a transparent film, an imprint layer formed on an upper surface of the transparent film, and a metal printing layer formed on a lower surface of the transparent film, wherein the metal printing layer is formed of the gravure printing ink composition of claim 1. Interior film. An interior film comprising a transparent film, an imprint layer and a metal printing layer sequentially formed on the lower surface of the transparent film, wherein the metal printing layer is formed of the ink composition for gravure printing of claim 1. The interior film according to any one of claims 8 to 10, further comprising a hot melt adhesive layer formed on the bottom surface of the metal printing layer. The interior film of claim 11, wherein the hot melt adhesive layer comprises a thermoplastic polyester resin having a number average molecular weight (Mn) of 7,000-35,000 and a glass transition temperature (Tg) of 10-80 ° C. The interior film according to any one of claims 8 to 10, further comprising a coloring printing layer having a color or a pattern. A steel sheet with an interior film comprising a steel sheet and the interior film of any one of claims 8 to 10, wherein the hot melt adhesive layer of the steel sheet and the interior film is integrally bonded by thermocompression bonding.

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