CN109321033B - Ink composition and interior film using same - Google Patents

Ink composition and interior film using same Download PDF

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Publication number
CN109321033B
CN109321033B CN201810796181.1A CN201810796181A CN109321033B CN 109321033 B CN109321033 B CN 109321033B CN 201810796181 A CN201810796181 A CN 201810796181A CN 109321033 B CN109321033 B CN 109321033B
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China
Prior art keywords
layer
film
ink composition
printing
metal
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CN201810796181.1A
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CN109321033A (en
Inventor
苏在银
朴晋佑
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Jingang Gaoli chemical glass products Co.,Ltd.
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Jingang Gaoli Chemical Glass Products Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/14—Printing inks based on carbohydrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/52—Electrically conductive inks
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J167/00—Adhesives based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Adhesives based on derivatives of such polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2451/00—Decorative or ornamental articles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2401/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
    • C08J2401/02—Cellulose; Modified cellulose

Abstract

The present invention relates to a printing ink composition containing conductive metal particles and a binder resin, which can exhibit the same metallic texture as a metal deposition layer, and improve manufacturability, productivity and economy while solving the problem of oxidation of the metal deposition layer, and an interior decoration film using the same.

Description

Ink composition and interior film using same
Technical Field
The present invention relates to an ink composition and an interior film using the same.
Background
Interior films having a metallic texture have been developed in various forms, and generally, as disclosed in korean registered patent No. 10-1268403, etc., the interior films are formed by depositing a metal such as aluminum (Al) under vacuum or similar conditions. However, as described above, when the metal deposition layer is provided, the metal texture of the appearance is excellent, but there is a problem that the oxidation problem (alkali, brine, etc.) of the metal deposition layer is caused. In addition, when the metal deposition layer is formed, there is a disadvantage that the process cost is high.
On the other hand, the conventional interior film has a structure of UV Imprint (UV Imprint)/raw material film (PET)/UV Imprint (UV Imprint)/metal (Al) deposition layer/adhesive layer/PVC layer. In order to manufacture the above-described interior film, a first process of forming a UV imprinting layer on a PET film, a second process of forming an aluminum (Al) deposition layer, a third process of laminating an adhesive or a PVC layer on a metal deposition layer, and the like are required, and thus there are problems in that the manufacturing process is complicated, and economical efficiency and productivity are low.
Disclosure of Invention
Technical problem
The present invention provides an ink composition for printing which can embody metallic texture, solve the problem of oxidation of a metal deposition layer, and improve manufacturability and productivity by using the ink composition for printing containing a binder and conductive metal particles, and an interior decoration film including a metal printing layer formed of the ink composition for printing.
Technical scheme
The invention provides an ink composition for printing, which comprises a first solution containing cellulose binder resin, a second solution containing conductive metal particles and a solvent, wherein the mixing ratio of the first solution to the second solution to the solvent is 100: 10-20: 40-60 by weight.
The present invention also provides an interior film having a metal printing layer formed using the printing ink composition.
The present invention also provides an interior film-attached steel sheet, which comprises a steel sheet and an interior film, wherein one surface of the steel sheet is integrally bonded to an adhesive layer of the interior film.
Effects of the invention
In the present invention, a metal printing layer is provided as one feature of an interior decoration film instead of expensive metal ink, wherein the metal printing layer is formed using an ink composition containing conductive metal particles and a resin binder for imparting viscosity and adhesion, thereby enabling to embody the same metal texture as a metal deposition layer and, at the same time, enabling to improve the appearance problem caused by oxidation of the metal deposition layer in the past.
In the present invention, after a semi-finished product In which a UV imprint layer is formed on a transparent film is manufactured, a coating layer having a desired composition and number of layers can be freely formed on the semi-finished product through a continuous In-line (In-line) process using a printer. Therefore, not only additional deposition and lamination processes are not required, but also the conventional three-step manufacturing process of the interior film is simplified into a two-step process, mass production is possible, and the manufacturing cost can be significantly saved.
In the present invention, a polyester having specific physical properties can be used as a component of the pressure-sensitive adhesive layer included in the interior film to improve the interlayer adhesion.
Drawings
Fig. 1 is a cross-sectional structural view showing a structure of an interior film according to one specific example of the present invention.
Fig. 2 is a cross-sectional structural view showing the structure of an interior film according to another example of the present invention.
Fig. 3 is a cross-sectional structural view showing the structure of an interior film according to another example of the present invention.
Fig. 4 is a cross-sectional structural view showing the structure of an interior film according to another example of the present invention.
Fig. 5 is a cross-sectional structural view showing the structure of an interior film according to another example of the present invention.
Fig. 6 is a cross-sectional structural view showing the structure of an interior film according to another example of the present invention.
Fig. 7 is a schematic view showing an embossing process in the manufacturing process of the interior film according to the present invention.
FIG. 8 is an In-Line (In-Line) type gravure printing process In the manufacturing process of the interior film according to the present invention
Schematic diagram of the process.
< reference character >
100. 200, 300, 400, 500, 600: indoor decoration film
10: transparent film 11: imprinting layer
11 a: first imprint layer 11 b: second imprinting layer
12: metal printing layer 12 a: first metal printing layer
12 b: second metal printed layer 12 c: third metal printing layer
13: color printing layer 14: adhesive layer
Detailed Description
The present invention will be described in detail below. However, the present invention is not limited to the following, and each constituent element may be modified in various forms or selectively mixed as necessary. Therefore, the present invention should be construed as including all modifications, equivalents, and alternatives falling within the spirit and scope of the present invention.
For reference, in the present specification, expressions such as "B formed on the upper portion (or lower portion) of a" or "B formed on a" are used to include all cases where B is directly attached to the upper portion or lower portion of a, where B is attached to the upper portion or lower portion of a via an adhesive layer or an adhesive layer, or where B is attached to the upper portion or lower portion of a via one or more additional layers directly or via an adhesive or a bonding agent.
< printing ink composition >
Printing methods such as Gravure printing (Gravure printing), offset printing (offset printing), and Flexo printing (Flexo printing) have the advantage of being able to express various sharp patterns and to mass-produce them by high-speed and continuous printing. The ink composition used in such printing (e.g., gravure printing) should have fluidity at a low viscosity. The ink composition according to the present invention includes conductive metal particles, a binder resin, and a solvent, and has a printable low viscosity.
In the present invention, the conductive metal particles are used as a main component of the ink for forming the metal printed layer provided in the interior film. The conductive metal particles are not particularly limited as long as they are a common conductive metal component in the field that can form a uniform metal printed layer by printing. For example, it may be one or more selected from the group consisting of aluminum (Al), copper (Cu), silver (Ag), gold (Au), nickel (Ni), platinum (Pt), and palladium (Pd).
The size or form of the conductive metal particles is not particularly limited. As one example, the average particle diameter of the conductive metal particles may be 50 μm or less, as another example, 1nm to 50 μm, and as yet another example, 10nm to 10 μm. When the conductive metal particles have the average particle diameter described above, a uniform and fine printed layer can be formed in a certain manner by a printing method. The conductive metal particles may be spherical, plate-shaped, needle-shaped, or amorphous, or a mixture of two or more of the foregoing forms.
In the present invention, the binder resin functions to impart appropriate viscosity and adhesion to the ink composition. As the binder resin, a general cellulose-based binder known in the art can be used. As an example, the cellulose-based binder may have a number average molecular weight (Mn) of 3,000 to 20,000, a glass transition temperature (Tg) of 10 to 90 ℃, and a melting temperature (Tm) of 120 to 200 ℃.
As a non-limiting example of the cellulose-based binder that can be used, methyl cellulose, ethyl cellulose, propyl cellulose, cellulose nitrate, cellulose acetate, cellulose propionate, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl hydroxypropyl cellulose, cellulose acetate butyrate, or a mixed form of two or more thereof may be mentioned.
The present invention can embody the same metal texture as a metal deposition layer (e.g., an aluminum deposition layer) by blending a binder resin that imparts leveling property (leveling), viscosity, and adhesion to a pigment and silver powder, without using expensive metal ink.
In the present invention, in addition to the above-described cellulose-based binder resin, one or more of the common binder resins known in the art may be used in combination, and the binder resin is exemplified by epoxy-based, acrylic-based, vinyl chloride-based, vinyl acetate-based, polyvinyl alcohol-based, polyurethane-based, and polyester-based binder resins.
In the present invention, the solvent functions to make the ink composition have a low viscosity enabling printing. The solvent may be suitably selected from common organic solvents known in the art and used in consideration of the conditions for preparing the printing ink (firing temperature, firing time, etc.). As an example, it may be an alcohol-based, ketone-based, acetate-based, carbonate-based solvent, or a mixture of two or more thereof.
The printing ink composition may further include a conventional additive known in the art. Non-limiting examples of additives that may be used if enumerated are plasticizers, thickeners (thickeners), stabilizers, dispersants, defoamers, pigments, surfactants, surface smoothing agents (leveling agents), reducing agents, wetting agents, and coupling agents, or two or more thereof. The amount of such additives to be used may be suitably adjusted within the range generally used in the art.
The printing ink composition of the present invention can be prepared by mixing and stirring the conductive metal particles, the cellulose-based binder resin, the solvent, and if necessary, other additives according to a conventional method known in the art. As an example, the conductive paste can be prepared by charging a first solution containing a cellulose-based binder resin, a second solution containing conductive metal particles, and a solvent at a specific mixing ratio, and uniformly mixing them with a stirrer, a mixer, or the like.
According to an 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 100:10 to 20:40 to 60 by weight, and may be 100:12 to 18:45 to 55 by weight as another example.
The first solution may have a composition including 10 to 20 parts by weight of a cellulose-based binder resin and a solvent that satisfies 100 parts by weight of the first solution, and may include, for example, 10 to 15 parts by weight of a cellulose-based binder resin (e.g., cellulose acetate butyrate), 20 to 30 parts by weight of a carbonate-based solvent (e.g., dimethyl carbonate), 30 to 40 parts by weight of a ketone, 10 to 15 parts by weight of acetone, 10 to 15 parts by weight of an acetate-based solvent (e.g., butyl acetate), and 1 to 5 parts by weight of an ethanol-based solvent (e.g., isopropyl alcohol).
The second solution may have a composition including 8 to 15 parts by weight of conductive metal particles and a solvent (e.g., an acetate-based solvent) in balance to satisfy 100 parts by weight of the second solution, and may include, for example, 8 to 12 parts by weight of conductive metal particles (e.g., aluminum powder), 75 to 85 parts by weight of ethyl acetate, and 5 to 15 parts by weight of isopropyl acetate.
The printing ink composition of the present invention having the above-mentioned structure may have a viscosity of, for example, 100 to 1,000cps, and as another example, 200 to 500cps at 25 ℃. By adjusting the viscosity to an appropriate range, fluidity suitable for manufacturing a metal printed layer by printing can be imparted, and residual film can be suppressed.
< interior film >
The present invention provides an interior film having a metal printing layer formed by printing the ink composition. The interior film is composed of a transparent film, at least one embossed layer formed on one or both surfaces of the transparent film, and at least one metal printing layer formed by printing the ink composition on the other surface (surface on which the embossed layer is not formed) of the embossed layer or the transparent film. The printing method is not particularly limited, and a Gravure printing method (Gravure printing), a offset printing method (offset printing), a flexographic printing method (Flexo printing), or the like can be used.
Fig. 1 to 6 are views schematically illustrating a sectional structure of an interior film according to an embodiment of the present invention, respectively. The respective constituent elements of the interior film will be described in more detail below with reference to the accompanying drawings.
Transparent film
In the present invention, the transparent film 10 is a film constituting a substrate (substrate) disposed on the front surface side of the interior film 100.
The transparent film is a general plastic film known in the art, and a plastic film having transparency can be used without limitation. As non-limiting examples of the transparent film material that can be used, PET (polyethylene terephthalate), PBT (polybutylene terephthalate), PP (polypropylene), PE (polyethylene), PVC (polyvinyl chloride), PMMA (polymethyl methacrylate), ABS (acrylonitrile-butadiene-styrene copolymer), PC (polycarbonate), SAN (styrene-acrylonitrile copolymer), or a mixture thereof may be cited. For example, a PET material having excellent uniformity and transparency can be used, and in this case, the three-dimensional pattern effect of the imprint layer formed on the upper portion and the metallic brightness feeling of the metal print 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 exceeds 10%, the metal printed layer cannot be well seen through to the appearance of the interior film, and the metallic appearance characteristics of the interior film are hindered.
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. The thickness of the film can be 20 to 120 μm as one example, and can be 25 to 100 μm as another example. When the thickness of the transparent film exceeds the above range, it cannot sufficiently function as a substrate (substrate) and cannot support the metal printed layer, thereby damaging the form of the interior film or degrading the appearance characteristics.
Imprinting layer
In the present invention, imprinting layers 11, 11a, and 11b representing a surface three-dimensional pattern are formed on one or both surfaces of the transparent film 10.
The imprinting layers 11, 11a, 11b may be manufactured by conventional methods known in the art. As an example, the transparent film may be formed by embossing an Ultraviolet (UV) -curable resin composition coated on the transparent film 10 and then curing the embossed resin composition using a molding roll (not shown) having a three-dimensional pattern. Alternatively, an embossed film layer having a three-dimensional pattern already formed may be attached to one or both surfaces of the transparent film 10.
The form of the surface solid pattern is not particularly limited, and may be a solid pattern representing any one or a combination of patterns selected from a circular or polygonal pattern, a cylindrical or polyhedral prism pattern, a grid (grid) pattern, a stripe pattern, a dot pattern, a mosaic pattern, a jacquard pattern, a plant pattern such as a flower pattern, various animal patterns, a cartoon pattern, a 3D solid pattern thereof, and the like, as one example. The three-dimensional pattern may be formed to a depth of 0.5 to 20 μm, and if it exceeds the above range, the scattering effect may be reduced.
The thickness of the imprint layers 11, 11a, 11b is not particularly limited, and may be appropriately adjusted within a general range known in the art. As one example, it may be in the range of 2 to 50 μm, and as another example, it may be 3 to 30 μm.
In the present invention, the composition of the Ultraviolet (UV) curable resin composition constituting the imprinting layers 11, 11a, 11b is not particularly limited, and includes, as one example, an acrylic oligomer, a monomer, a photoinitiator, and other additives that complement physical properties.
The acrylic oligomer may be one selected from polyurethanes, epoxies, esters, ethers, or silicones. For example, urethane acrylate prepared by reacting diisocyanate, polyol and methacrylate can be used.
As the photoinitiator, there can be used without limitation a photoinitiator which is generally used in the industry, and as one example, a photoinitiator such as IRGACURE 184 can be used, and a light stabilizer such as TINUVIN 400 can be used in combination.
The ultraviolet curable resin composition may further contain a pigment for a UV resin, which is generally used in this field, if necessary.
Metal printing layer
In the interior film 100 of the present invention, the metal print layer 12 is formed on the other surface (surface on which the embossed layer is not formed) of the transparent film 10 or on the embossed layers 11, 11a, and 11 b.
The metal printed layer 12 is provided for expressing a metal texture different from that of a metal base material (not shown) described later, for example, a steel sheet, and is used for the purpose of imparting a metal texture and a beautiful and unique color.
In the present invention, the metal printed layer 12 may be formed using a general metal known in the art. As one example, aluminum (Al), copper (Cu), silver (Ag), gold (Au), nickel (Ni), platinum (Pt), palladium (Pd), or a combination thereof may be used. Depending on the metallic texture effect to be exhibited, the metal oxide or alloy of two or more of the above-mentioned components can be variously modified.
The metal printing layer 12 is formed by a printing method (for example, gravure printing method) using the aforementioned ink composition, and the thickness thereof is not particularly limited. As one example, it may be 100nm to 100 μm thick, and as another example, it may be in a range of 1 to 50 μm.
The metal printed layer 12 may be a single metal printed layer or a multi-layer metal printed layer. When the metal printing layer 12 is formed of a plurality of layers, a higher-class appearance can be exhibited than when it is formed of a single layer by thickness and color control of each layer, and a metal texture of various colors and high brightness can be expressed.
Adhesive layer
The interior film 200 of the present invention may further include an adhesive layer 14 on the other surface (surface on which the embossed layer and the transparent film are not formed) of the metal print layer 12. The adhesive layer 14 provides excellent adhesion between a lower steel plate (not shown) and the interior film 200.
In the present invention, the adhesive layer 14 may be formed using an adhesive generally used in this field without limitation. For example, the adhesive layer 14 may be formed using a hot melt type adhesive that is generally used in the art for achieving adhesion by heat and pressure, without limitation. As one example, it may be formed using an adhesive composition including a polyester resin, a copolymer of vinyl chloride and vinyl acetate, a curing agent, and a solvent.
As an example of the polyester resin, a polyester resin having a number average molecular weight of 7,000 to 35,000 and a glass transition temperature (Tg) of 10 to 80 ℃ can be used.
The copolymer of vinyl chloride and vinyl acetate may be Polyvinyl chloride-vinyl acetate (PVCA). However, it is not particularly limited thereto.
In the present invention, the thickness of the adhesive layer 14 is not particularly limited, and may be 10 to 80 μm as an example. When the thickness of the pressure-sensitive adhesive layer is outside the above range, the adhesion between the steel sheet and the interior film may be insufficient and the steel sheet may be easily peeled off, and the hardness may be too high and the workability of the interior film-adhered steel sheet may be deteriorated.
Colored printing layer
The interior film 500 according to the present invention may further include a color printed layer 13 as necessary. The color printed layer 13 not only allows various colors to be expressed, but also serves to increase the aesthetic feeling of the steel sheet to which the interior film is attached.
The color printed layer 13 has a certain color or pattern, and in this case, the color and/or pattern are not particularly limited and may be appropriately used according to the intended use or the user's need (need). The thickness of the colored printed layer 13 is not particularly limited, and may be 10 to 50 μm as an example.
UV hard coating
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 used to protect the surface of the film in the external environment and prevent surface scratches or contamination, and may be formed by applying an ultraviolet curable resin composition or a thermosetting resin composition by a gravure coating method and then UV curing or thermosetting.
As the ultraviolet curable resin composition or the heat curable resin composition, acrylic urethane, epoxy, urethane, polyisocyanate, polyester, acrylate, ethylene-vinyl acetate copolymer, polyamide, melamine, synthetic rubber, polyvinyl alcohol resin, etc. may be used, and an inorganic filler may be further included to improve strength and mechanical properties.
The thickness of the UV hard coat layer is not particularly limited, and may be 1 to 30 μm as one example. When the thickness exceeds the above range, the scratch preventing effect is weak, or the cost is increased as compared with the effect.
The interior film of the present invention including the above-described configuration may have the following six embodiments. However, the present invention is not limited to the following exemplary embodiments, and various modifications and applications can be made as necessary.
For reference, the interior film may be classified as a single-sided type or a double-sided type according to the number of embossed layers arranged based on a transparent film as a base layer, and may be classified as a single-sided inner type or a single-sided outer type according to the position where the embossed layers are arranged.
Fig. 1 is a sectional view showing a first embodiment of an interior film 100 according to the present invention. The interior film 100 has a double-sided structure including a transparent film 10, a first embossed layer 11a formed on an upper surface of the transparent film 10, a second embossed layer 11b formed on a lower surface of the transparent film 10 in this order, and a metal printed layer 12.
The first imprinted layer 11a formed on the upper surface of the transparent film 10 should have both flexibility and high strength (hard) characteristics, and it is appropriate that the second imprinted layer 11b disposed between the transparent film 10 and the metal printed layer 12 be adjusted to have not only the foregoing two physical properties but also physical properties capable of further improving interlayer adhesion.
Fig. 2 is a sectional view showing a second embodiment of an interior film 200 according to the present invention. The interior film 200 has a double-sided structure including a transparent film 10, a first embossed layer 11a formed on an upper surface of the transparent film 10, a second embossed layer 11b formed on a lower surface of the transparent film 10 in this order, a metal printing layer 12, and an adhesive layer 14.
Fig. 3 is a sectional view showing a third embodiment of an interior film 300 according to the present invention. The interior film 300 has a single-sided exterior (single-outer) structure including a transparent film 10, an embossed layer 11 formed on an upper surface of the transparent film 10, and a metal print layer 12 and an adhesive layer 14 sequentially formed on a lower surface of the transparent film 10.
Fig. 4 is a sectional view showing a fourth embodiment of an interior film 400 according to the present invention. The interior film 400 has a single-sided inner (single-inner) structure including a transparent film 10, an embossed layer 11, a metal printing layer 12, and an adhesive layer 14 sequentially formed on a lower surface of the transparent film 10. At this time, a UV hard coating layer (not shown) formed on the upper surface of the transparent film 10 may be further included.
Fig. 5 is a sectional view showing a fifth embodiment of an interior film 500 according to the present invention. The interior film 500 has a double-sided structure including a transparent film 10, a first embossed layer 11a formed on an upper surface of the transparent film 10, a second embossed layer 11b formed on a lower surface of the transparent film 10 in this order, a metal printed layer 12, a color printed layer 13, and an adhesive layer 14.
Fig. 6 is a sectional view showing a sixth embodiment of an interior film 600 according to the present invention. The interior film 600 has a double-sided structure including a transparent film 10, a first embossed layer 11a formed on an upper surface of the transparent film 10, and a second embossed layer 11b, a metal printed layer 12a/12b, a color printed layer 13, a metal printed layer 12c, and an adhesive layer 14 sequentially formed on a lower surface of the transparent film 10.
The structure of the interior film of the present invention is not particularly limited to the above-described exemplary structure, and it is also within the scope of the present invention that the number of coatings and the stacking order of the coatings constituting the interior film are freely selected according to the application. As an example, the coating layers may be modified in order, may be alternately stacked, may be introduced with another normal coating layer, and may have a composite layer structure.
< method for producing interior film >
A method for manufacturing an interior film according to an embodiment of the present invention will be described. However, the present invention is not limited to the following manufacturing method, and the steps of the respective steps may be performed in a modified manner or selectively mixed as necessary.
The interior film of the present invention can be manufactured through a first process of manufacturing a semi-finished product in which a UV imprinting layer is formed on a transparent film, and a second process of continuously manufacturing at least one or more different kinds of printing layers on the semi-finished product using a gravure printing machine.
As an example, the first process may be performed by an embossing process shown in fig. 7, and the second process may be performed by a gravure printing process shown in fig. 8. The printing process performed In the second process is an In-line (In-line) process In which coating and drying are continuously performed In one coating line, and thus, the number of layers of the interior film and the composition of the coating layer to be manufactured can be freely changed by simply changing the number and composition of the ink compositions disposed In the coating line without requiring a separate deposition or layer-adding process.
As one example, the method of manufacturing the interior film may include: (i) preparing a semi-finished product in which a UV imprint layer is formed on one or both surfaces of a transparent film; (ii) a step of forming a metal printing layer by coating and drying the semi-finished product with an ink composition for gravure printing by using a gravure printing machine; and (iii) a step of forming an adhesive layer by coating and drying the semi-finished product on which the metal printing layer is formed with an adhesive composition using a gravure printing machine.
According to needs, in the present invention, between the steps (ii) and (iii), there may be further included: and a step of forming a colored printed layer by coating and drying the semi-finished product on which the metal printed layer is formed with a colored composition using a gravure printing machine.
< interior film-coated Steel sheet >
The invention provides an indoor decoration film attached steel plate which comprises a steel plate and an indoor decoration film, wherein the steel plate and an adhesive layer of the indoor decoration film are integrally bonded.
The interior film may be formed in all of the three embodiments described above, i.e., a double-sided type, a single-sided exterior type, and a single-sided interior type.
The steel sheet is used as a metal base material for an object to which the interior film is to be bonded, and a metal sheet used in the field as a home appliance, an industrial product, a building interior material and/or a building exterior material can be used without limitation. Specific examples thereof include cold rolled steel (CR), hot dip galvanized steel (GI), electrogalvanized steel (EGI), alloy steel sheet (GA), copper sheet, tin-plated steel sheet, hot dip galvanized steel sheet, galvannealed steel sheet, electrogalvanized steel sheet, hot dip aluminum-zinc alloy steel sheet, and aluminum sheet.
The interior film attachment steel sheet according to the present invention can be manufactured according to a method generally used in the art. As an example, the steel sheet is disposed in contact with the hot melt adhesive layer of the interior film, and then the hot melt adhesive layer is pressed under a temperature and pressure condition that the hot melt adhesive layer can be hot-melted.
As one example, the steel sheet may be preheated to, for example, 80 ℃ or more, and as another example, to a temperature of 80 to 200 ℃ before the interior film is press-bonded to the steel sheet. The apparatus applicable to preheating the steel sheet is not particularly limited as long as it is a Heating apparatus capable of controlling the temperature, and may be an apparatus capable of controlling a heat source such as an IR Heater (Infrared Ray Heater), a Steam Heating roller (Steam Heating Roll), or an electric Heating roller (electric Heating Roll) using Infrared rays, as an example.
The interior film-coated steel sheet having the above-described structure can be used for various purposes. As one example, there are a home appliance exterior material, a decorative product inside and outside a building, a decorative material for furniture and the like, and the like.
The present invention will be described more specifically with reference to examples. However, the following examples are only for the purpose of facilitating understanding of the present invention, and the scope of the present invention is not limited to the examples in any sense.
Example 1 preparation of ink composition for printing
The components and compositions of the raw material materials constituting the printing ink composition of the present invention are shown in table 1 below. After preparing a medium for aluminum (Al) slurry (first solution), an aluminum (Al) slurry (second solution) and a solvent, respectively, according to the compositions described in table 1 below, they were mixed and stirred at a weight ratio of 100:15:50 to prepare an ink composition for printing of example 1.
[ TABLE 1 ]
Figure BDA0001735953760000111
1) Cellulose acetate butyrate: number average molecular weight 16,000, Tg 85 deg.C, melting temperature 135 deg.C
2) Aluminum (Al) powder: plate shape, average size 12 μm, thickness 40nm
Example 2 production of an interior film having a Metal print layer
A coating film was formed by applying an ultraviolet-curable urethane acrylate resin composition to one surface of a transparent polyethylene terephthalate (PET) film having a thickness of 30 μm in a thickness of 10 μm, and an imprint layer was formed by performing an imprint process on the coating film. Then, a coating film was formed by applying an ultraviolet-curable urethane acrylate resin composition to the other surface of the transparent PET film, and a half-finished product having a double-sided imprint layer was manufactured by performing an imprint process. The manufacturing process of the double-sided imprint performed as described above is shown in fig. 7 described below.
The semi-finished product on which the double-sided imprint layer was formed was coated with the printing ink composition of example 1, a coloring composition including polyester, vinyl chloride, and urethane ink, and a hot melt adhesive composition in this order by a gravure printing machine as shown in fig. 8, passed through an Oven (Oven), and then dried to manufacture an interior film.

Claims (13)

1. An ink composition for printing, comprising:
a first solution containing a cellulose-based binder resin, a second solution containing conductive metal particles, and a solvent,
the first solution comprises 10-20 parts by weight of cellulose binder resin and a residual solvent satisfying 100 parts by weight of the first solution, wherein the residual solvent contained in the first solution is at least one selected from the group consisting of carbonate solvents, ketone solvents, acetate solvents and ethanol solvents,
the second solution contains 8-15 parts by weight of conductive metal particles and a residual solvent satisfying 100 parts by weight of the second solution, the residual solvent contained in the second solution is an acetate solvent,
the solvent is one or more selected from the group consisting of alcohols, ketones, acetates, and carbonates,
the mixing ratio of the first solution to the second solution to the solvent is 100: 10-20: 40-60 wt%.
2. The printing ink composition according to claim 1,
the printing ink composition has a viscosity of 100 to 1,000cps at 25 ℃.
3. The printing ink composition according to claim 1,
the cellulose adhesive has a number average molecular weight of 3,000-20,000, a glass transition temperature of 10-90 ℃, and a melting temperature of 120-200 ℃.
4. The printing ink composition according to claim 1,
the conductive metal particles are one or more selected from the group consisting of aluminum, copper, silver, gold, nickel, platinum, and palladium.
5. The printing ink composition according to claim 1,
the conductive metal particles have an average particle diameter of 50 ㎛ or less.
6. The printing ink composition according to claim 1,
further comprises one or more selected from the group consisting of plasticizers, thickeners, stabilizers, dispersants, defoamers, pigments, surfactants, surface smoothing agents, reducing agents, wetting agents and coupling agents.
7. An interior decoration film comprises a transparent film, a first imprinting layer formed on the upper surface of the transparent film, a second imprinting layer and a metal printing layer sequentially formed on the lower surface of the transparent film,
the metal printing layer is formed from the printing ink composition according to claim 1.
8. An interior decoration film comprising a transparent film, an embossed layer formed on an upper surface of the transparent film, and a metal printed layer formed on a lower surface of the transparent film,
the metal printing layer is formed from the printing ink composition according to claim 1.
9. An interior decoration film comprises a transparent film, an embossing layer and a metal printing layer which are sequentially formed on the lower surface of the transparent film,
the metal printing layer is formed from the printing ink composition according to claim 1.
10. The interior decoration film according to any one of claims 7 to 9, wherein,
further comprising an adhesive layer formed on the lower face of the metal printed layer.
11. The interior film of claim 10,
the adhesive layer includes a thermoplastic polyester resin having a number average molecular weight of 7,000 to 35,000 and a glass transition temperature of 10 to 80 ℃.
12. The interior decoration film according to any one of claims 7 to 9, wherein,
also comprises a colored printing layer with color or pattern.
13. An interior decoration film attached steel plate is provided,
the interior film according to any one of claims 7 to 9, comprising a steel plate and the adhesive layer of the interior film, wherein the steel plate and the adhesive layer of the interior film are bonded together by thermocompression bonding.
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