KR20190023545A - Decoration sheet - Google Patents

Abstract

The present invention relates to a decorative film which comprises sequentially from an upper portion: an ultraviolet curable adhesive resin layer having a concavo-convex pattern formed on a lower surface of a base film layer; and a metal deposition layer formed on the lower surface on which the concavo-convex pattern is formed, wherein the ultraviolet curable adhesive resin layer is a cured product of an ultraviolet curable adhesive resin composition, and the ultraviolet curable adhesive resin composition comprises: a urethane acrylate oligomer; a reactive monomer; and a photoinitiator. In addition, the decorative film can prevent interlayer separation.

Description

Decoration film {DECORATION SHEET}

The present invention relates to a decorative film.

Metal plates such as stainless steel or aluminum plate are high-grade interior materials used for interior or exterior of buildings, household appliances such as refrigerators, electronic products, automobile interior / exterior materials, furniture, doors and advertising materials.

Metal materials are used to form various patterns on the surface or polished to reflect light. More specifically, for example, the surface of stainless steel or aluminum plate is polished and then subjected to corrosion processing, laser processing, polishing or the like It is used as an interior material in which a pattern is formed through a sanding method to realize a beautiful decorative effect.

The above-mentioned metal material is used as an interior material to express a high-quality appearance, but it is difficult to process such as cutting, cutting and bending, and has a disadvantage that the price is very high. Accordingly, various attempts have been made to use a plastic material having an excellent processability and a comparatively low price by implementing a texture similar to a metal material and using the same as an interior material.

An embodiment of the present invention is a high gloss sheet capable of realizing a unique pattern of various metal plate materials on a film surface and excellent in workability during a process of coating the object article and maintaining excellent adhesive force between layers at high temperature and room temperature, Thereby providing a decorative film which can prevent lifting and delamination.

In one embodiment of the invention, from the top, sequentially:

The base film layer

An ultraviolet curable adhesive resin layer having a concavo-convex pattern formed on a lower surface thereof;

A metal deposition layer formed on a lower surface of the concavo-convex pattern;

And a decorative film,

The ultraviolet curable adhesive resin layer is a cured product of the ultraviolet curable adhesive resin composition,

Wherein the ultraviolet curable adhesive resin composition comprises a urethane acrylate oligomer, a reactive monomer, and a photoinitiator,

The urethane acrylate oligomer is obtained by copolymerizing a polycarbonate polyol and an isocyanate compound

Provides a decorative film.

The decorative film is a high-gloss sheet, which can realize a unique pattern of various metal plate materials on the surface of a film. The decorative film is excellent in workability during the process of coating the object article and maintains excellent adhesive force between the layers at high temperature and room temperature, It is possible to prevent delamination between layers.

1 is a schematic cross-sectional view of a decorative film according to an embodiment of the present invention.
2 is a schematic cross-sectional view of a decorative film according to another embodiment of the present invention.
3 is a schematic cross-sectional view of a decorative film according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail. However, the present invention is not limited thereto, and the present invention is only defined by the scope of the following claims.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

In the drawings, the thickness is enlarged to clearly represent the layers and regions. In the drawings, for the convenience of explanation, the thicknesses of some layers and regions are exaggerated.

Hereinafter, the formation of any structure in the "upper (or lower)" or the "upper (or lower)" of the substrate means that any structure is formed in contact with the upper surface (or lower surface) of the substrate However, the present invention is not limited to not including other configurations between the substrate and any structure formed on (or under) the substrate.

In one embodiment of the invention,

From the top, sequentially:

The base film layer

An ultraviolet curable adhesive resin layer having a concavo-convex pattern formed on a lower surface thereof;

A metal deposition layer formed on a lower surface of the concavo-convex pattern;

And a decorative film,

Wherein the ultraviolet curable adhesive resin layer is a cured product of an ultraviolet curable adhesive resin composition, wherein the ultraviolet curable adhesive resin composition comprises a urethane acrylate oligomer, a reactive monomer and a photoinitiator, wherein the urethane acrylate oligomer is a polycarbonate polyol and an isocyanate compound Thereby providing a decorative film formed by copolymerization.

1 is a cross-sectional view of the decorative film 100 and shows a structure in which a base film layer 10, an ultraviolet curable adhesive resin layer 20, and a metal vapor deposition layer 30 are sequentially laminated from above.

The base film layer 10 may be formed of a thermoplastic resin including at least one selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polymethylmethacrylate, polyester, vinyl chloride resin, polypropylene, polyethylene and polyacrylate Plastic film layer.

In one embodiment, the substrate film layer 10 may be a layer of polyethylene terephthalate film.

The decorative film (100) has a three-dimensional effect by the concavo-convex pattern formed on the lower surface of the ultraviolet-curable adhesive resin layer (20), and an aesthetic effect that gives a metallic texture by the metal vapor deposition layer For example, a household appliance such as a refrigerator, and the like.

The concavo-convex pattern formed on the lower surface of the ultraviolet-curable adhesive resin layer 20 may be a micro concavo-convex pattern including an emboss pattern or a fine pattern, for example, irregularities having a depth of 1 탆 to 20 탆.

The decorative film 100 may further include an adhesive layer 40 under the metal deposition layer 30.

2 is a sectional view of the decorative film 200 and shows a structure in which a base film layer 10, an ultraviolet curable adhesive resin layer 20, a metal vapor deposition layer 30 and an adhesive layer 40 are sequentially stacked from above Respectively.

By attaching the decorative film 200 to a target article to be attached via the adhesive layer 40, the decorative film 200 can coat the target article as a surface finish material of the target article.

The decorative film (100, 200) is a high gloss sheet, which can realize a unique pattern of various metal plate materials on the surface of the film, has excellent processability during the process of coating the object article and maintains excellent adhesive force between the layers at high temperature and room temperature So that the lifting phenomenon and the delamination between layers can be prevented.

The ultraviolet-curable adhesive resin layer 20 can be formed by photo-curing the ultraviolet-curable adhesive resin composition. The ultraviolet-curable adhesive resin composition may be prepared into a solvent-free type.

The ultraviolet curable adhesive resin composition includes a urethane acrylate oligomer, a reactive monomer, and a photoinitiator.

The urethane acrylate oligomer is formed by copolymerization of a polycarbonate polyol and an isocyanate compound, and the urethane acrylate oligomer includes a first urethane acrylate oligomer and a second urethane acrylate oligomer having different molecular weights.

The first urethane acrylate oligomer has a weight average molecular weight of 10,000 to 40,000 g / mol, and the second urethane acrylate oligomer has a weight average molecular weight of 500 to 5,000 g / mol.

The weight ratio of the first urethane acrylate oligomer to the second urethane acrylate oligomer may be from 95: 5 to 5:95.

The ultraviolet curable adhesive resin layer 20 has excellent tensile strength and proper elongation by using two kinds of urethane acrylate oligomers having different molecular weights, The adhesive force at room temperature and high temperature can be excellently realized with respect to the adhesive layer 30.

By using the first urethane acrylate oligomer having a relatively high molecular weight, the ultraviolet-curing adhesive resin layer 20 can realize an appropriate level of elongation, so that the base film layer 10 and the metal deposition layer 30 Thereby improving adhesion at high temperatures while preventing peeling from occurring.

The second urethane acrylate oligomer having a relatively low molecular weight is used to improve the adhesive force at room temperature of the ultraviolet curable adhesive resin layer 20 and to coat the object to which the decorative film 100 or 200 is attached It is possible to improve the workability of the decorative film (100, 200) and to prevent the occurrence of pressing marks or unwanted stripe patterns.

By using the first urethane acrylate oligomer and the second urethane acrylate oligomer together, the ultraviolet curable adhesive resin layer 20 can achieve an appropriate tensile strength.

The isocyanate compound may include at least one selected from the group consisting of a polyisocyanate, an alicyclic diisocyanate, and a trimer adduct.

Examples of the isocyanate compound include polyisocyanates such as hexamethylene diisocyanate and trimethylhexamethylene diisocyanate, isophorone diisocyanate (IPDI), dicyclohexylmethane-4,4'-isocyanate, dicyclomethane- Diisocyanate such as 1,6-hexanediol diisocyanate and 1,6-hexanediol diisocyanate substituted with hydrogen, tris (6-isocyanatohexyl) 1,3,5-triazine-2,4 , Trimer adducts obtained by modifying hexamethylene diisocyanate such as 5-trione, and the like.

In one embodiment, the isocyanate-based compound may be isophorone diisocyanate.

The polycarbonate polyol and the isocyanate compound may be reacted at a functional group molar ratio (NCO / OH) of 1.0 to 2.3 to synthesize a urethane acrylate oligomer. Specifically, the functional group molar ratio may be 1.7 to 2.3. If the molar ratio of the functional group is less than 1.0, the molecular weight of the urethane acrylate does not increase. If the molar ratio exceeds 2.3, unreacted isocyanate groups remain and unreacted materials may cause poor coating and deteriorate adhesive property.

The synthesis of the urethane oligomer can then be completed by end-capping the oligomers terminated with methacrylate or other acrylate groups.

The reactive monomer may include at least one selected from the group consisting of an acryloyl group, an acrylate group, a methacrylate group, a vinyl group, and combinations thereof.

Specifically, the reactive monomer may include one selected from the group consisting of acryloylmorpholine, acrylamide, alicyclic (meth) acrylate, and combinations thereof.

The reactive monomer may further include, for example, alkyl acrylate, hydroxyalkyl acrylate, carboxylethyl acrylate, diacrylate, triacrylate, and the like. For example, the reactive monomer may additionally be selected from the group consisting of ethylhexyl acrylate, hydroxyalkyl acrylate, carboxylethyl acrylate, tetrahydrofurfuryl acrylate (THFA), butanediol diacrylate, hexanediol diacrylate, hexanediol di (Meth) acrylate, ethylene glycol diacrylate, diethylene glycol diacrylate, triethylene glycol diacrylate, trimethylolpropane triacrylate (TMPTA), pentaerythrityl triacrylate, glyceryl propoxylate (HDDA), tripropylene glycol diacrylate (TPGDA), and combinations thereof. [0043] The term " a "

Acryloylmorpholine or acrylamide is used as a hard monomer to impart polarity to the surface of the ultraviolet curable adhesive resin layer 20 to improve the interfacial adhesion force and heat resistance with the base film layer 10 and the metal vapor deposition layer 30 I can raise it.

In one embodiment, the ultraviolet-curable adhesive resin composition may comprise 5 to 15% by weight of acryloylmorpholine.

In another embodiment, the ultraviolet-curable adhesive resin composition may contain 0.5 to 8% by weight of a hydroxyl group-containing acrylamide.

The ultraviolet ray curable adhesive resin composition may contain acryloylmorpholine or acrylamide having a hydroxyl group in the above amount so as to improve the adhesion and facilitate the release even in a UV imprint roll which can be used for pattern formation.

In addition, when the ultraviolet-curable adhesive resin composition contains both acryloylmorpholine and acrylamide, the interfacial adhesion between the base film layer 10 and the metal deposition layer 30 can be further improved. In the case of acryloylmorpholine, when the content of acryloylmorpholine is high, the acryloylmorpholine has a hard property and acts to lower the adherence at room temperature and high temperature due to the decrease in elongation. Thus, the ultraviolet-curing adhesive resin layer (20) 10) and the metal vapor deposition layer (30) may occur, so that the content thereof is limited. In the case of acrylamide containing hydroxyl group, contrary to acryloylmorpholine, since the content thereof is soft, it may affect the properties of processing such as pressing marks when the content is increased. The content is also limited. The ultraviolet ray curable adhesive resin composition may contain acryloylmorpholine and acrylamide in an amount sufficient to increase the total content of the ultraviolet curable adhesive resin composition so that the ultraviolet curable adhesive resin composition does not adversely affect the substrate film layer 10 and the metal deposition layer 30 The adhesive force can be effectively improved.

In the ultraviolet curable adhesive resin composition, the weight ratio of the urethane acrylate oligomer to the reactive monomer may be 60 to 67: 33 to 40.

The ultraviolet curable adhesive resin composition may include the urethane acrylate oligomer and the reactive monomer in the content range described above to achieve proper elongation, heat resistance, and appropriate viscosity to improve workability.

The ultraviolet ray curable adhesive resin composition may be used in an effective amount as an ordinary amine additive, a silane monomer, a stabilizer, a photosensitizer, a dispersing agent or a leveling agent as other additives. More specifically, the total weight of the ultraviolet- Based on 1 to 5% by weight.

The silane-based monomer and the stabilizer can prevent the adhesive strength from being reduced.

Representative examples of the silane-based monomer include vinyltrimethoxysilane, vinyltrimethoxysilane, vinyltri (methoxyethoxy) silane, gamma-methacryloxypropyltrimethoxysilane, and gamma-glycidylsilane of Chisso Co., Gamma-aminopropyltriethoxysilane, and gamma-mercaptopropyltrimethoxysilane, which may be used in an amount of 1 to 5% by weight based on the total weight of the composition.

The stabilizers serve to improve the thermal and oxidative stability and improve the storage stability of the coating composition. Representative stabilizers include Irganox 1010, Irganox 1035, Irganox 1076 from Ciba, TPP And mixtures thereof. The stabilizer may be used in an amount of 0.1 to 5% by weight based on the total weight of the composition.

In addition, photosensitizers, dispersants and leveling agents can be used as commonly used materials.

The ultraviolet-curable adhesive resin layer 20 is formed by photo-curing an ultraviolet-curable adhesive resin composition blended as described above, and has a tensile strength in a specific range and a specific range of modulus (referred to as tensile elastic modulus or Young's modulus) It is possible to achieve excellent durability and good adhesion at room temperature and at high temperature to the base film layer 10 and the metal deposition layer 30, respectively. In other words, there is a certain range of tensile strength and modulus ranges required to achieve all of these effects simultaneously. Specifically, the ultraviolet-curable adhesive resin layer 20 may have a tensile strength of 15 to 30 kg / mm ² and a modulus of 800 to 1800 MPa. More specifically, the ultraviolet-curable adhesive resin layer 20 may have a tensile strength of 17 to 27 kg / mm ² . More specifically, the modulus of the ultraviolet-curable adhesive resin layer 20 may be 910 to 1400 MPa.

Modulus refers to the ratio of the stress to strain in this section (tensile stress / tensile strain) in a section where the strain on the stress changes linearly (Hook's law).

The concavo-convex pattern on the lower part of the ultraviolet-curable adhesive resin layer 20 can be formed according to a known method such as ultraviolet ray imprinting method or a method of transferring a pattern by a mold having a pattern formed thereon. For example, the ultraviolet curable adhesive resin composition is coated on the surface of a metal plate having a pattern formed thereon, the base film layer 10 is closely adhered on the coated side of the ultraviolet curable adhesive resin composition, The ultraviolet-curable adhesive resin composition is cured to form the concave-convex pattern on one side and the ultraviolet-curable adhesive resin layer 20 in which the base film layer 10 is laminated on the other side. Then, the metal deposition layer 30 may be formed on the surface on which the concavo-convex pattern is formed.

The metal deposition layer 30 may be formed by depositing at least one metal selected from tin, nickel, chromium, aluminum, indium, SUS, copper, silver, gold and platinum.

The metal deposition layer 30 may be formed by various methods such as vacuum deposition, thermal deposition, sputtering, paste coating, and the like. Particularly, the sputtering method is a method in which metal nanoparticles are coated in a plasma state of stainless steel, aluminum, chromium, nickel, tin or copper, and the metal deposition layer can be uniformly coated with a thinner film than the thermal deposition method , And there is no problem of cracking even after molding.

The adhesive layer 40 may include at least one selected from the group consisting of a hydroxyl group-containing acrylic adhesive, a saturated polyester adhesive, a urethane adhesive, and a combination thereof.

The adhesive composition may include an isocyanate-based curing agent such as xylene diisocyanate (XDI), hexamethylene diisocyanate (HDI), methylene diphenyl diisocyanate (MDI), and toluene diisocyanate (TDI) Ketone, toluene, ethyl acetate, methyl isobutyl ketone, and the like.

The adhesive layer 40 can be formed by applying an adhesive such as polyester to a thickness of 10 to 15 mu m by a comma coater method, and by forming the opaque layer, a clearer three-dimensional effect can be produced. When the adhesive layer 40 is formed of an opaque layer, a pigment may be added to the adhesive.

The decorative film may further include a primer layer on the upper, lower, or both sides of the metal deposition layer.

3 is a sectional view of the decorative film 300. The decorative film 300 includes a base film layer 10, an ultraviolet curable adhesive resin layer 20, a primer layer 50, a metal vapor deposition layer 30, a primer layer 50, And an adhesive layer 40 are sequentially laminated.

The primer layer 50 serves to increase the adhesion between the metal deposition layer 30 and the ultraviolet curable adhesive resin layer 20 or the adhesive layer 40. Examples of the primer layer 50 include acrylic, , Polyurethane-based, polyisocyanate-based, polyester-based, acrylate-based, ethylene-vinyl acetate copolymer, polyamide-based, melamine-based, synthetic rubber-based or polyvinyl alcohol-based resins. The primer layer 50 may be formed to have a thickness of approximately 1 to 5 탆 and may be formed by changing the viscosity of the resin solution used for the production of the primer layer 50, Can be adjusted.

In this case, the decorative film 100, 200, 300 may be adhered to the adhesive layer 40 by the adhesive layer 40 after the release film is removed, And can be applied to interior or exterior of a building, an interior finishing material for household appliances, an electronic product, an automobile interior / exterior material, furniture, a door, and an advertisement material, for example.

Hereinafter, examples and comparative examples of the present invention will be described. The following embodiments are only examples of the present invention, and the present invention is not limited to the following embodiments.

( Example )

Manufacturing example  A

11.2 g of isophorone diisocyanate (IPDI) (manufactured by Bayer) and 30 g of isobornyl acrylate (IBoA) were added to a 3-liter round bottom flask equipped with a stirrer, and then 0.01 g of dibutyltindilaurate Tokyo Chemical).

After maintaining the reaction temperature at 80 캜, 50.5 g of a polycarbonate polyol having a number average molecular weight of 2,000 g / mol by Asahi Kasei Co., Ltd. was added to the reactor.

After completion of the addition, a urethane prepolymer was obtained, and 0.1 g of SONGNOX (R) 1010 (manufactured by Songwon Industrial Co., Ltd.) and 8.2 g of 2-hydroxyethyl methacrylate (manufactured by Mi Won Specialty) . The NCO peak at 2270 cm < -1 > is observed to disappear with an infrared spectrometer, and the reaction is terminated to obtain a photopolymerizable urethane acrylate oligomer. The weight average molecular weight of the prepared urethane acrylate oligomer is 11,000 g / mol (gel permeation chromatography (GPC)) and the viscosity is 70,490 cps at 25 캜.

Manufacturing example  B

27.2 g of a polycarbonate polyol having a number average molecular weight of 500 g / mol, 24.3 g of isophorone diisocyanate, 17.2 g of hydroxyethyl acrylate and 1.3 g of N-hydroxyethyl acrylamide were used, Oligomers were prepared.

The weight average molecular weight of the prepared urethane acrylate oligomer is 3,000 g / mol (gel permeation chromatography (GPC)) and the viscosity is 17,530 cps at 25 캜.

Manufacturing example  C

A urethane acrylate oligomer was prepared as in Example A above except that 50.5 g of caprolactone polyol having a number average molecular weight of 2,000 g / mol by Perstorp Inc. and 11.2 g of isophorone diisocyanate were used. The weight average molecular weight of the prepared urethane acrylate oligomer is 11,500 g / mol (gel permeation chromatography (GPC)) and the viscosity is 88,000 cps at 25 캜.

Manufacturing example  D

A urethane acrylate oligomer was prepared as in Example A above except that 50.5 g of a polyester polyol having a number average molecular weight of 2,000 g / mol and 11.2 g of isophorone diisocyanate were used. The weight average molecular weight of the prepared urethane acrylate oligomer is 10,000 g / mol (gel permeation chromatography (GPC)) and the viscosity is 63,000 cps at 25 캜.

The urethane acrylate oligomers synthesized in Preparation Examples A to D are shown in Table 1 below.

Urethane acrylate oligomer Polyol copolymer Polyisocyanate Weight average molecular weight A Polycarbonate polyol
(Mn 2,000 g / mol) Isophorone diisocyanate 11,000 B Polycarbonate polyol
(Mn 500 g / mol) Isophorone diisocyanate 3,000 C Caprolactone polyol
(Mn 2000 / mol) Isophorone diisocyanate 11,500 D Polyester polyol
(Mn 2000 / mol) Isophorone diisocyanate 10,000

Example  1-2 and Comparative Example  1-2

The UV-curable adhesive resin composition was prepared by mixing the urethane acrylate oligomer, the reactive monomer, and the photoinitiator at the weight ratios shown in Table 2 below. The ultraviolet curable adhesive resin composition was coated on the surface of an aluminum plate having a 15 mu m micro concavo-convex pattern formed to a thickness of 10 mu m. Next, a 38 탆 thick polyethylene terephthalate (PET) film (corresponding to the base film layer) was closely adhered to the coating liquid, and ultraviolet rays were irradiated at a light quantity of 400 mJ / cm ² to cure the ultraviolet curable resin coating solution.

When the resin layer of the cured coating liquid was prepared, the aluminum plate was separated to confirm a pattern formed on the surface of the ultraviolet curable adhesive resin layer.

Next, a metal deposition layer of aluminum having a thickness of 500 nm was formed on the patterned surface of the ultraviolet-curable adhesive resin layer at a temperature of 10 ^-5 torr and 500 ° C using a vacuum thermal deposition method, and a polyethylene terephthalate film, A cured adhesive resin layer and a metal vapor deposition layer were laminated.

division Example 1 Example 2 Comparative Example 1 Comparative Example 2 Urethane acrylate oligomer A 30 30 - - B 30 40 - - C - - 60 - D - - - 60 Reactive monomer ACMO 9.5 9.5 9.5 9.5 HEAA 5 5 5 5 IBOA 14 14 14 14 HDDA 8.5 8.5 8.5 8.5 Photoinitiator DAROCUR # 1173 5 5 5 5

ACMO: acryloylmorpholine

HEAA: N-hydroxyethylacrylamide

IBOA: isobornyl acrylate

HDDA: 1,6-hexanediol diacrylate

Experimental Example

The decorative films prepared in Examples 1-2 and 1-2 were evaluated for tensile strength, elongation test, Erickson room temperature test, Erickson hot water test, peel strength and workability.

(1) Evaluation of tensile strength and elongation

And evaluated using UTM (universal testing machine) (Zwick-Roell, Universal Testing Machine Z100).

- Rate of evaluation: 30 mm / min

- Evaluation method: length 40mm (length) is the width of the vertical full 10mm (width) of the rod-shaped metal halide lamp 350mJ / cm ² irradiated after curing mold fill in the UV-curable adhesive resin composition on the silicon mold with a thickness of 50㎛ The specimens for evaluation were prepared. The length at which the specimen was cut was measured as an 'elongated length' while the 10 mm of each of the upper and lower ends of the specimen was fixed and the specimen was cut under the condition of a speed of 30 mm / minute. The loaded load was applied to the width and thickness of the film, The strength was measured.

(2) Modulus evaluation (tensile modulus or Young's modulus)

The modulus is a value corresponding to the initial slope of the tensile strength (stress vs. strain curve, strain stress). The tensile strength and elongation were measured using the same UTM (universal testing machine, Zwick-Roell , Universal Testing Machine Z100). The evaluation speed was measured at 30 mm / min and the modulus value corresponding to the slope of the tangent at the point of 1 N force, at which the apparatus recognized the force, was measured.

(3) Ericsson room temperature test

The decorative film samples were cut in an 11 × 11 shape so as to cross the upper portion of the polyethylene terephthalate film layer horizontally and vertically (# shape) at intervals of 5 mm using a knife, and then sphere (SUS ) Ball was pressed 9 mm deep from the side of the metal deposition layer to observe the cut surface of the opposite 11 < 11 > shape to visually evaluate the adhesion of the decorative film (measuring instrument: Erichsen TEST instrument).

<Erickson room temperature test evaluation standard, room temperature>

○: Cross-cut peeling and no peeling

Δ: 5-15% peeling of the exfoliation affected by cross-cut.

X: Peeling all affected by cross-cut peeling.

(4) Erickson's hot water test

The sample which had been subjected to the normal temperature test by Ericsson was allowed to stand in a thermostatic chamber containing water at 80 DEG C for 30 minutes, and the cut surface was observed, and the adhesion state was visually confirmed.

<Erikson hot water test evaluation standard>

The best case was rated at 5 points, and the worst case was rated at 1 point.

(5) peeling force of the ultraviolet curable adhesive resin layer

UV-curable adhesive resin prepared in each of Examples 1-2 and 1-2 was laminated in the order of a glass plate / solvent-free UV curable resin / Toray 30 μm PET film, followed by 180 peel peeling force after 1 hour after UV irradiation Respectively.

The peel force was measured using (XP plus, TA).

(6) Evaluation of workability

In the decorative films of Examples 1-2 and 1-2, an adhesive layer was formed by using an acrylic adhesive containing a hydroxyl group for iron laminates for metal vapor deposition, and then adhered to an SUS plate.

The evaluation was made on the 5-point scale with 5 points being the best case and 1 point being the worst case by visually observing the dysplasia, whether or not heat wrinkle occurred, and the thickness variation in the coating layer of the decorative film.

The results are shown in Table 3 below.

division The tensile strength
kg / mm ² Stretched distance
mm Modulus
[MPa] Ericsson room temperature test Ericsson's hot water
80 캜, 30 min Peel force
g / in Workability Example 1 24.09 2.38 1350 ○ 5 3,340 5 Example 2 20.84 2.21 984 ○ 4 3,581 5 Comparative Example 1 13.79 1.0 1850 △ 2 3,240 3 Comparative Example 2 36.98 4.07 760 X One 3,200 One

From the results shown in Table 3, it was found that the coating properties of the decorative film were excellent in Examples 1 and 2, and excellent workability was obtained, and both the Ericsson room temperature test and the hot water resistance test were satisfied, And the peel force characteristics are realized.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, And falls within the scope of the invention.

10: base film layer
20: UV curable adhesive resin layer
30: metal deposition layer
40: adhesive layer
50: primer layer
100, 200, 300: Decorative film

Claims (11)

From the top, sequentially:
The base film layer
An ultraviolet curable adhesive resin layer having a concavo-convex pattern formed on a lower surface thereof;
A metal deposition layer formed on a lower surface of the concavo-convex pattern;
And a decorative film,
The ultraviolet curable adhesive resin layer is a cured product of the ultraviolet curable adhesive resin composition,
Wherein the ultraviolet curable adhesive resin composition comprises a urethane acrylate oligomer, a reactive monomer, and a photoinitiator,
The urethane acrylate oligomer is obtained by copolymerizing a polycarbonate polyol and an isocyanate compound
Decorative film.
The method according to claim 1,
In the ultraviolet curable adhesive resin composition, the weight ratio of the urethane acrylate oligomer to the reactive monomer is 60 to 67: 33 to 40
Decorative film.
The method according to claim 1,
Wherein the urethane acrylate oligomer comprises a first urethane acrylate oligomer and a second urethane acrylate oligomer having different molecular weights
Decorative film.
The method according to claim 1,
Wherein the weight average molecular weight of the first urethane acrylate oligomer is 10,000 to 40,000 g / mol and the weight average molecular weight of the second urethane acrylate oligomer is 500 to 5,000 g / mol
Decorative film.
The method according to claim 1,
The isocyanate compound includes at least one selected from the group consisting of polyisocyanates, alicyclic diisocyanates, and trimer adducts.
Decorative film.
The method according to claim 1,
Wherein the reactive monomer comprises at least one member selected from the group consisting of an acryloyl group, an acrylate group, a methacrylate group, a vinyl group, and combinations thereof
Decorative film.
The method according to claim 1,
Wherein the reactive monomer comprises one selected from the group consisting of acryloylmorpholine, acrylamide, alicyclic (meth) acrylate monomer, and combinations thereof
Decorative film.
8. The method of claim 7,
Wherein the reactive monomer further comprises one selected from the group consisting of alkyl acrylates, hydroxyalkyl acrylates, carboxyl ethyl acrylates, diacrylates, triacrylates, and combinations thereof.
Decorative film.
The method according to claim 1,
Wherein the ultraviolet-curable adhesive resin layer has a tensile strength of 15 to 30 kg / mm ² and a modulus of 800 to 1800 MPa
Decorative film.
The method according to claim 1,
Further comprising an adhesive layer under the metal vapor deposition layer
Decorative film.
The method according to claim 1,
Further comprising a primer layer on the upper, lower or both sides of the metal deposition layer
Decorative film.

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