KR20120107814A - Manufacturing for matallic thin film - Google Patents

Abstract

PURPOSE: A method for manufacturing a metallic thin film is provided to offer a metallic thin film of excellent quality by increasing weatherproof properties. CONSTITUTION: A metallic layer is formed on a base material layer(10). The thickness of the metallic layer is 0.05 to 0.4micrometers. A surface processing layer(40) is formed on the metallic layer with surface processing agent. The surface processing agent comprises silane coupling agent or acid compound. The surface processing agent additionally comprises inorganic filler in order to improve optical properties.

Description

Method of manufacturing metal thin film {MANUFACTURING FOR MATALLIC THIN FILM}

The present invention relates to a method for producing a metal thin film on which the metal layer is surface treated after forming a metal layer, and to a metal thin film produced thereby.

TFT-LCD back light units, which are applied to mobile phones, LCD TVs, LED TVs, and navigation devices, which are frequently used in everyday life, are becoming cheaper and higher in brightness as their usage increases and develops.

In order to improve the performance of the backlight unit, a film having high reflection performance is required. In addition, a thin film is possible for notebooks, mobile phones, LED TVs, LCD TVs, and a metal thin film having excellent optical properties is required.

In general, a conventional reflective film is manufactured by silver deposition or sputtering. In Japanese Patent Laid-Open No. 2008-009006, a metal thin film was formed using a deposition method.

In Japanese Patent Laid-Open No. 2002-129259 and the like, it is known to form a reflective film having a high reflectance by vacuum deposition with silver as a main component. The surface of the flexible substrate such as PET was subjected to vacuum deposition using metals such as silver (Ag), aluminium (Al), nickel (Ni), and rhodium (Rh) having high reflectivity, and then the lamination of the reflective film through lamination to the support. In the case of vacuum deposition, a high vacuum chamber (chamber) is required, and the shape and size of the substrate are limited, coating thickness is uneven, and there is a problem due to a large equipment cost.

In addition, there is a limit that can be estimated at a high price when judging from the low yield and the low speed and high equipment cost coming from the deposition process.

Accordingly, the present inventors have successfully reached the present invention as a result of diligent efforts to solve these problems. That is, the present invention formed a metal thin film prepared by the coating method and secured weather resistance through the surface treatment, and has a laminating process with a pressure-sensitive adhesive printing to develop a weather resistant strong reflective film that can maintain high reflectance and brightness It became.

In addition, when manufacturing the reflective film by the conventional casting method, there is a problem that the luminance, reflectance decreases, and the yellow index rises due to the organic material on the silver reflective surface, and the oxidation of silver cannot be prevented without the protective layer. In Japanese Patent Laid-Open No. 2005-280131, a weatherproof improved reflective film was prepared with a weatherproof resin layer. However, improving weather resistance with the resin layer can reduce the decrease in reflectance and the occurrence of yellowing, but there is a shortage when evaluating weather resistance for a long time.

It is an object of the present invention to provide a method for producing a metal thin film that can provide excellent weather resistance through surface treatment and a metal thin film produced thereby.

The present invention comprises the steps of: a) providing a metal layer on the base layer; And b) forming a surface treatment layer on the metal layer with a surface treatment agent including at least one selected from a silane coupling agent and an acid. It provides a manufacturing method.

The present invention provides a metal thin film produced by the above production method.

The present invention provides a backlight unit including a metal thin film for reflective film.

The present invention can improve the metal thin film properties, in particular weather resistance, to provide a better quality metal thin film, specifically 250 hours, 500 hours, 1000 hours in a high temperature environment, high temperature and high humidity environment, thermal shock environment of the metal film It is possible to provide a high brightness metal thin film having a higher reflectance and a lower yellow index value, with improved reflectance change and color coordinate change at.

1 is a cross-sectional view of a metal thin film according to the present invention.
2 is a photograph of a metal thin film according to the present invention.
3 is a view showing a deformation mesh pattern of the adhesive pattern layer according to the present invention.

Method for producing a metal thin film according to the present invention comprises the steps of: a) providing a metal layer on the base layer; And b) forming a surface treatment layer on the metal layer with a surface treatment agent including at least one selected from a silane coupling agent and an acid.

In the step a), the metal layer is formed of a silver (Ag) ink coating liquid, and the silver (Ag) ink coating liquid is one or two selected from one or more silver compounds of Formula 1 and the following Formulas 2 to 4 It is characterized by containing a silver complex compound obtained by reacting at least an ammonium carbamate-based or ammonium carbonate-based compound.

[Formula 1]

[Formula 2]

(3)

[Formula 4]

In the above formulas,

X is from oxygen, sulfur, halogen, cyano, cyanate, carbonate, nitrate, nitrite, sulfate, phosphate, thiocyanate, chlorate, perchlorate, tetrafluoroborate, acetylacetonate, carboxylate and derivatives thereof Substituent is selected, n is an integer of 1 to 4, R1 to R6 are independently of each other hydrogen, C1-C30 aliphatic or alicyclic alkyl group, aryl or aralkyl group, alkyl and aryl substituted functional group And a substituent selected from a heterocyclic compound, a high molecular compound and derivatives thereof, except that all of R 1 to R 6 are hydrogen.

As a method of applying the silver (Ag) ink, a gravure coating, a flexo coating, a slot die coating, and a microgravure coating method may be used.

It is baked after the coating as described above, but when firing, it is not particularly limited as long as the coated silver coating liquid is converted to silver metal, but can be baked after being left for 10 seconds to 20 minutes at 60 to 200 ° C. In the present invention, as an example, the silver (Ag) metal layer may be prepared by applying the microgravure coating method and baking the applied silver (Ag) ink at 150 ° C. for 5 minutes.

Here, in the case of the silver ink coating liquid to be used, detailed description thereof will be omitted as the manufacturing method is described in Patent Registration No. 10-0727483 filed by the present inventors.

The method of manufacturing a metal thin film according to the present invention may further include providing a primer layer between the base layer and the metal layer in step a). Here, the primer layer may be formed by applying various materials known in the art as long as the material can improve the adhesion between the base layer and the metal layer.

In the step a), the metal layer may have a thickness of 0.05 μm to 0.4 μm, preferably 0.15 μm to 0.3 μm. When provided in the thickness range, it is possible to provide excellent optical properties, the optical properties may be lowered if too small or too large than the thickness.

In the step b), the surface treatment is performed to remove traces of organic matter from the metal layer and to prevent oxidation of metals such as oxidation of silver (Ag).

The surface treating agent may be prepared by adding a solvent to at least one selected from a silane coupling agent and an acid compound.

For example, based on 100 parts by weight of the surface treating agent, at least one selected from a silane compound and an acid compound as the silane coupling agent is added in an amount of 0.005 to 50 parts by weight, and the solvent is 50 to 99.995 parts by weight. It can be prepared by addition. When added in the above range can provide an excellent antioxidant effect, if too less than the addition amount may be lowered the antioxidant effect in too many cases.

Here, the silane compound and the acid compound may be used or mixed, respectively, and when the silane compound is added alone, 0.005 to 50 parts by weight may be added, and when the acid compound is added alone, 0.01 to 50 parts by weight is added. can do. When the silane compound and / or the acid compound are added in the above range, excellent optical properties may be provided, and when the amount of the silane compound and / or the acid compound is added too small or too much, the optical properties may be degraded.

In step b), a silane coupling agent selected from 3-Mercaptopropyltrimethoxysilane, Methyltrimethoxysilane, TetraEthoxysilane, Trimethylorthosilicate, Methyltriethoxysilane, Dimethyldimethoxysilane, Propyltrimethoxysilane, Propyltriethoxysilane, Trimethoxy (octadecyl) silane, Isobutyltrimethoxysilane, Isobutyltriethoxysilane, PhenyloxysilaneOxylsilane, or more than 1 n-trioxysilane Can be used.

As the acid compound in step b), one or more acid compounds selected from Oleic acid, Neodecanoic acid, Valeric acid, Lauric acid, Malvalic acid, Decanoic acid, Butyric acid, and Heptanoic acid may be used. have.

The solvent may be one or more selected from acetone, MEK, MIBK, MAK, toluene, xylene, methanol, ethanol, isopropanol, and n-butanol.

In step b), the surface treatment agent may further include an inorganic filler to improve optical properties.

The inorganic filler may use one or more selected from MgO, ZnO, SiO ₂ , and TiO ₂ .

For example, in the step b), the surface treatment agent may be prepared by adding a solvent to at least one selected from the silane coupling agent and the acid and the inorganic filler.

On the basis of 100 parts by weight of the surface treatment agent, at least one selected from the silane coupling agent (acid) and acid (acid) is added to 0.005 to 50 parts by weight, the inorganic filler is added to 0.01 to 0.1 parts by weight, The solvent may be prepared by adding 49.9 to 99.998 parts by weight.

In step b), the surface treatment layer may include a microgravure coating, a gravure coating, a flexo coating, a spin coating, a slot die coating, and a lip. The surface treatment agent may be formed using a method selected from among lip coating and spray coating.

The method of manufacturing a metal thin film according to the present invention may further include c) forming an adhesive pattern layer on which the adhesive is patterned in a predetermined pattern on the surface treatment layer.

As the adhesive in step c), at least one selected from acrylic, polysiloxane, and polyester adhesives may be used.

In step c), the adhesive may include 5 to 50 parts by weight of the adhesive solids, 0.01 to 1 parts by weight of the inorganic filler, and 49 to 96 parts by weight of the solvent, based on 100 parts by weight of the total adhesive. When added in the above range it can provide excellent optical properties and adhesion, and if it is too small or too large than the addition amount may be reduced optical properties and adhesion.

As said adhesive solid content, an acrylic resin, a polysiloxane resin, and a polyester resin can be used.

The inorganic filler may include at least one selected from Al ₂ O ₃ , SiO ₂ , and TiO ₂ .

In step c), the adhesive pattern layer may have a straight or polygonal shape. One straight pattern may be arranged sporadically or regularly, or may be a discontinuous form where the straight patterns are connected or unconnected, and may be a mesh form as an example of polygonal shape. Specifically, a hexagon mesh, a square mesh, a circular pattern Dot, triangular mesh, or a mesh pattern of a mixture thereof. Each vertex region of the triangular mesh and the rectangular mesh may be provided in a partially cut shape to have a deformed mesh pattern (see FIG. 3). As such, the pattern of the adhesive pattern layer may be formed continuously or discontinuously. Here, the shape of the adhesive pattern layer is not limited thereto, and may be variously changed.

In the step c), the pattern may have a line width of 0.1 μm to 5000 μm. When provided in the line width range can provide excellent optical properties, if the line width is too thin, the adhesion may be reduced.

In the step c), the air gap of the pattern may be 100 μm˜10000 μm. Herein, the air layer is a space formed by the height of the actual pattern on the basis of the cross section, and is formed between the surface treatment layer and the protective film, and the air layer can improve the luminance.

In the step c), the adhesive pattern layer may include direct gravure printing, flexography printing, gravure offset, imprint, lithography printing, and screen printing. The adhesive may be formed by printing the adhesive by a method selected from screen printing and rotary screen printing.

The method of manufacturing a metal thin film according to the present invention may further include d) providing a protective film on the adhesive pattern layer.

In the providing of the protective film, the adhesive pattern layer and the protective film may be laminated using a laminator.

The protective film is polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyether sulfone (PES), nylon (Nylon), polytetrafluoroethylene (PTFE), polycarbonate (PC), cellophane (Cellophane) , Polyarylate (PAR), and polyimide (PI) may be a film selected from.

The thickness of the protective film may be 10 ~ 200㎛. For example, the thickness of the protective film may vary from 12 μm, 19 μm, 25 μm, 38 μm, 50 μm, 75 μm, 100 μm, 125 μm, 188 μm.

The metal thin film according to the present invention may be manufactured by the above-described manufacturing method, and the metal thin film thus prepared may be composed of, for example, a base layer, a primer layer, a metal layer, an adhesive pattern layer, a protective film, As shown in Figure 1, it may be composed of a base layer, a primer layer, a metal layer, a surface treatment layer, an adhesive pattern layer, a protective film.

The reflective film may be applied to various display apparatuses, and may be used as, for example, a reflective film of a backlight unit of the display apparatus.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto.

Example 1

0.1 part by weight of 3-Mercaptopropyltrimethoxysilane and 99.9 parts by weight of ethanol were mixed and dissolved to prepare a surface treatment liquid. The prepared surface treatment liquid was applied onto a film (Toray Advanced Materials, XG532) on which a silver (Ag) layer, which is a metal layer, was formed using a microgravure coater, and dried at a temperature of 180 ° C. for 5 minutes to form a surface treatment layer.

Subsequently, as an adhesive, 11 parts by weight of polysiloxane type adhesive, 50 parts by weight of xylene, and 39 parts by weight of toluene were mixed. This adhesive was microgravure-coated on the surface treatment layer, and the protective film was laminated to 12 micrometers of polyethylene terephthalate (PET).

Example 2

0.1 part by weight of 3-Mercaptopropyltrimethoxysilane and 99.9 parts by weight of ethanol were mixed and dissolved to prepare a surface treatment liquid. The prepared surface treatment liquid was applied onto a film (Toray Advanced Materials, XG532) on which a silver (Ag) layer, which is a metal layer, was formed using a microgravure coater, and dried at a temperature of 180 ° C. for 5 minutes to form a surface treatment layer.

Subsequently, the adhesive was prepared by mixing 20 parts by weight of a polyester type adhesive, 20 parts by weight of MEK, 20 parts by weight of butyl acetate, and 40 parts by weight of butyl glycol acetate. This adhesive was microgravure-coated on the surface treatment layer, and the protective film was laminated to 12 micrometers of polyethylene telephthalate (PET).

Example 3

0.1 part by weight of 3-Mercaptopropyltrimethoxysilane and 99.9 parts by weight of ethanol were mixed and dissolved to prepare a surface treatment liquid. The prepared surface treatment liquid was applied onto a film (Toray Advanced Materials, XG532) on which a silver (Ag) layer, which is a metal layer, was formed using a microgravure coater, and dried at a temperature of 180 ° C. for 5 minutes to form a surface treatment layer.

The adhesive was prepared by mixing 11 parts by weight of acrylic co-polymer type adhesive, 50 parts by weight of butyl glycol acetate, and 39 parts by weight of butyl acetate. This adhesive was microgravure-coated on the surface treatment layer, and the protective film was laminated to 12 micrometers of polyethylene terephthalate (PET).

Example 4

1.0 parts by weight of neodecanoic acid and 99 parts by weight of ethanol were mixed and dissolved to prepare a surface treatment liquid. The prepared surface treatment liquid was applied onto a film (Toray Advanced Materials, XG532) on which a silver (Ag) layer, which is a metal layer, was formed using a microgravure coater, and dried at a temperature of 180 ° C. for 5 minutes to form a surface treatment layer.

Subsequently, as an adhesive, 11 parts by weight of polysiloxane type adhesive, 50 parts by weight of xylene, and 39 parts by weight of toluene were mixed. This adhesive was microgravure-coated on the surface treatment layer, and the protective film was laminated to 12 micrometers of polyethylene terephthalate (PET).

Example 5

0.1 part by weight of 3-mercaptopropyltrimethoxysilane, 0.1 part by weight of ZnO, and 99.8 parts by weight of ethanol were mixed and dissolved to prepare a surface treatment liquid. The prepared surface treatment liquid was applied onto a film (Toray Advanced Materials, XG532) on which a silver (Ag) layer, which is a metal layer, was formed using a microgravure coater, and dried at a temperature of 180 ° C. for 5 minutes to form a surface treatment layer.

The adhesive was prepared by mixing 11 parts by weight of a polysiloxane type adhesive, 0.5 parts by weight of SiO 2, 50 parts by weight of xylene, and 38.5 parts by weight of toluene. This adhesive was microgravure-coated on the surface treatment layer, and the protective film was laminated to 12 micrometers of polyethylene telephthalate (PET).

Comparative Example 1 (No surface treatment / No adhesive pattern printed)

The adhesive was prepared by mixing 11 parts by weight of polysiloxane type adhesive, 50 parts by weight of xylene, and 39 parts by weight of toluene.

And this adhesive agent was coated on the film (Toray Advanced Materials, XG532) in which the silver (Ag) layer which is a metal layer was formed using the microgravure method.

Subsequently, the protective film was laminated with polyethylene terephthalate (PET) 12 μm in a continuous process.

Comparative Example 2 (No surface treatment / No adhesive pattern printed)

The adhesive was prepared by mixing 20 parts by weight of a polyester type adhesive, 20 parts by weight of MEK, 20 parts by weight of butyl acetate, and 40 parts by weight of butyl glycol acetate.

And this adhesive agent was coated on the film (Toray Advanced Materials, XG532) in which the silver (Ag) layer which is a metal layer was formed using the microgravure method.

Subsequently, the protective film was laminated with polyethylene terephthalate (PET) 12 μm in a continuous process.

Comparative Example 3 (No surface treatment / No adhesive pattern printed)

The adhesive was prepared by mixing 11 parts by weight of acrylic co-polymer type adhesive, 50 parts by weight of butyl glycol acetate, and 39 parts by weight of butyl acetate.

And this adhesive agent was coated on the film (Toray Advanced Materials, XG532) in which the silver (Ag) layer which is a metal layer was formed using the microgravure method.

Subsequently, the protective film was laminated with polyethylene terephthalate (PET) 12 μm in a continuous process.

In the following, the composition of each layer in each Example and Comparative Example is summarized as [Table 1], and [Table 2] shows the optical properties result data of each Example and Comparative Example, and 85 ℃, high temperature and high humidity conditions. The optical property change data after 250hr was left at, and the optical property change data after 250hr at 100 ℃ high temperature were shown.

Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Surface treatment nDA - - - One - - - - 3-mercapto-propyl tri-methoxysilane 0.1 0.1 0.1 - 0.1 - - - ZnO - - - - 0.1 - - - Solvent 99.9 99.9 99.9 99 99.8 - - - glue Acrylic co-polymer - - 11 - - - - 11 Polyester - 20 - - - - 20 - Poly siloxane 11 - - 11 11 11 - - SiO2 - - - - 0.5 - - - Solvent 89 80 89 89 88.5 89 80 89

Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Initial optical properties reflectivity 98.45 98.34 98.42 98.57 98.53 98.55 98.43 98.47 Y.I 1.85 2.27 2.09 1.77 1.81 1.63 1.97 1.79 250hr
After
Optical properties High temperature and high humidity 85 ℃ 85% reflectivity 98.37 98.25 98.29 98.24 98.43 98.16 98.04 98.02 Y.I 1.99 2.34 2.19 2.36 1.89 2.49 2.98 2.69 High temperature 100 ℃ reflectivity 98.42 98.31 98.36 98.36 98.41 98.26 98.12 98.23 Y.I 1.89 2.29 2.20 2.31 1.83 2.34 2.81 2.51

Example 6

1.0 parts by weight of neodecanoic acid and 99 parts by weight of ethanol were mixed and dissolved to prepare a surface treatment liquid. The prepared surface treatment liquid was applied onto a film (Toray Advanced Materials, XG532) on which a silver (Ag) layer, which is a metal layer, was formed using a microgravure coater, and dried at a temperature of 180 degrees for 5 minutes to form a surface treatment layer.

The adhesive was prepared by mixing 17.5 parts by weight of acrylic co-polymer type adhesive, 40 parts by weight of butyl glycol acetate, and 42.5 parts by weight of butyl acetate. This adhesive was printed on the surface treatment layer by direct gravure printing in nine types according to line width, open area and pattern shape.

Subsequently, the protective film was laminated with polyethylene terephthalate (PET) 12 μm in a continuous process.

Example 7

0.1 part by weight of 3-Mercaptopropyltrimethoxysilane and 99.9 parts by weight of ethanol were mixed and dissolved to prepare a surface treatment liquid. The prepared surface treatment liquid was applied onto a film (Toray Advanced Materials, XG532) on which a silver (Ag) layer, which is a metal layer, was formed using a microgravure coater, and dried at a temperature of 150 ° C. for 5 minutes to form a surface treatment layer.

The adhesive was prepared by mixing 17.5 parts by weight of acrylic co-polymer type adhesive, 40 parts by weight of butyl glycol acetate, and 42.5 parts by weight of butyl acetate. This adhesive was printed on the surface treatment layer by direct gravure printing in nine types according to line width, open area and pattern shape.

Subsequently, the protective film was laminated with polyethylene terephthalate (PET) 12 μm in a continuous process.

Example 8

1.0 parts by weight of neodecanoic acid and 99 parts by weight of ethanol were mixed and dissolved to prepare a surface treatment liquid. The prepared surface treatment liquid was applied onto a film (Toray Advanced Materials, XG532) on which a silver (Ag) layer, which is a metal layer, was formed using a microgravure coater, and dried at a temperature of 180 degrees for 5 minutes to form a surface treatment layer.

The adhesive was prepared by mixing 25 parts by weight of a polyester type adhesive, 20 parts by weight of MEK, 20 parts by weight of butyl acetate, and 35 parts by weight of butyl glycol acetate. This adhesive was printed on the surface treatment layer by direct gravure printing in nine types according to line width, open area and pattern shape.

Subsequently, the protective film was laminated with polyethylene terephthalate (PET) 12 μm in a continuous process.

Example 9

0.1 part by weight of 3-Mercaptopropyltrimethoxysilane and 99.9 parts by weight of ethanol were mixed and dissolved to prepare a surface treatment liquid. The prepared surface treatment liquid was applied onto a film (Toray Advanced Materials, XG532) on which a silver (Ag) layer, which is a metal layer, was formed using a microgravure coater, and dried at a temperature of 150 ° C. for 5 minutes to form a surface treatment layer.

The adhesive was prepared by mixing 25 parts by weight of a polyester type adhesive, 20 parts by weight of MEK, 20 parts by weight of butyl acetate, and 35 parts by weight of butyl glycol acetate.

The adhesive was printed on the surface treatment layer by direct gravure printing in nine types according to line width, open area and pattern shape.

Subsequently, the protective film was laminated with polyethylene terephthalate (PET) 12 μm in a continuous process.

Example 10

1.0 parts by weight of neodecanoic acid and 99 parts by weight of ethanol were mixed and dissolved to prepare a surface treatment liquid. The prepared surface treatment liquid was applied onto a film (Toray Advanced Materials, XG532) on which a silver (Ag) layer, which is a metal layer, was formed using a microgravure coater, and dried at a temperature of 180 degrees for 5 minutes to form a surface treatment layer.

The adhesive was prepared by mixing 15 parts by weight of polysiloxane type adhesive, 50 parts by weight of xylene, and 35 parts by weight of toluene. This adhesive was printed on the surface treatment layer by direct gravure printing in nine types according to line width, open area and pattern shape.

Subsequently, the protective film was laminated with polyethylene terephthalate (PET) 12 μm in a continuous process.

Example 11

0.1 part by weight of 3-mercaptopropyltrimethoxysilane and 0.19.8 parts by weight of ZnO were mixed and dissolved to prepare a surface treatment liquid. The prepared surface treatment liquid was applied onto a film (Toray Advanced Materials, XG532) on which a silver (Ag) layer, which is a metal layer, was formed using a microgravure coater, and dried at a temperature of 150 ° C. for 5 minutes to form a surface treatment layer.

The adhesive was prepared by mixing 15 parts by weight of a polysiloxane type adhesive, 50 parts by weight of SiO 2 0.5 parts by weight xylene and 34.5 parts by weight of toluene. This adhesive was printed on the surface treatment layer by direct gravure printing in nine types according to line width, open area and pattern shape.

Subsequently, the protective film was laminated with polyethylene terephthalate (PET) 12 μm in a continuous process.

Hereinafter, the composition of each layer in each Example and Comparative Example is summarized as shown in [Table 3], [Table 4] summarizes the optical characteristic result data in each Example and Comparative Example, [Table 5] Shows the results of some selected examples as left at 250 ° C. under 85 ° C. and 85% high temperature and high humidity conditions. [Table 6] shows the results of some selected examples as left at 250 ° C. under 100 ° C. high temperature conditions.

Example 6 Example 7 Example 8 Example 9 Example 10 Example 11 Comparative Example 1 Comparative Example 2 Comparative Example 3 Surface treatment nDA 1.0 - 1.0 - 1.0 - - - - 3-mercapto-propyl tri-methoxysilane - 0.1 - 0.1 - 0.1 - - - ZnO - - - - - 0.1 - - - Solvent 99 99.9 99 99.9 99 99.8 - - - glue Acrylic co-polymer 17.5 17.5 - - - - 11 Polyester - - 25 25 - - 20 Poly siloxane - - - - 15 15 11 SiO2 - - - - - 0.5 Solvent 82.5 82.5 75 75 85 84.5 89 80 89 Upper PET Hood 12 12 12 12 12 12 12 12 25

Optical Characteristics by Line Width and Open Area Width Example 6 Example 7 Example 8 Example 9 Example 10 Example 11 Comparative Example 1 Comparative Example 2 Comparative Example 3 ore
Scoop
castle Line: 300 Open: 500 reflectivity 98.55 98.48 98.36 98.25 98.69 98.57 - - - Y.I 1.62 1.75 2.21 2.17 1.59 1.67 - - - Line: 300 Open: 1000 reflectivity 98.68 98.62 98.59 98.54 98.78 98.69 - - - Y.I 1.59 1.53 2.06 2.11 1.43 1.39 - - - Line: 300 Open: 2000 reflectivity 98.69 98.64 98.65 98.67 98.79 98.72 - - - Y.I 1.44 1.42 1.54 1.62 1.37 1.34 - - - Line: 300 Open: 5000 reflectivity 98.99 98.78 98.88 98.86 98.89 98.87 - - - Y.I 0.63 0.70 0.69 0.55 0.54 0.65 - - - Line: 300 Open: 1130 reflectivity 98.60 98.63 98.67 98.68 98.72 98.68 - - - Y.I 1.49 1.45 1.92 1.94 1.40 1.41 - - - Line: 400 Open: 5000 reflectivity 98.98 98.84 98.89 98.80 98.92 98.85 - - - Y.I 0.62 0.77 1.23 1.34 0.64 0.70 - - - Line: 300 Open: 2000▩ reflectivity 98.75 98.69 98.74 98.70 98.87 98.72 - - - Y.I 1.23 1.41 1.56 1.46 1.14 1.21 - - - Line: 300 Open: 5000▩ reflectivity 98.89 98.83 99.11 99.04 98.95 98.89 - - - Y.I 0.66 0.67 0.52 0.54 0.56 0.63 - - - Line: 300 Open: 4000▩ reflectivity 98.96 98.89 99.06 98.99 98.98 98.91 - - - Y.I 0.79 0.81 0.51 0.53 0.62 0.74 - - - Front lamination reflectivity - - - - - - 98.55 98.43 98.47 Y.I - - - - - - 1.63 1.97 1.79

   High Temperature Humidity Test 85 ℃ 85%   Surface treatment    Adhesive    Initial optical properties    Optical characteristics after 250 hours Optical characteristic change rate    reflectivity   Y.I.   reflectivity  Y.I.     △ Reflectance  ΔY.I.    Example 6 L: 300 O: 2000 nDA Acrylic 98.69 1.44 98.32 2.13 -0.37 0.69     Example 6-L: 300 O: 5000 98.89 0.66 98.54 1.22 -0.35 0.56   Example 7 L: 300 O: 2000 3-mercapto-propyl tri-
methoxysilane 98.64 1.42 98.41 1.84 -0.23 0.42    Example 7-L: 300 O: 5000 98.83 0.67 98.71 1.14 -0.12 0.47  Example 8 L: 300 O: 2000 nDA Poly-
siloxane 98.65 1.54 98.25 2.34 -0.40 0.80    Example 8-L: 300 O: 5000 99.11 0.52 98.77 1.24 -0.34 0.72   Example 9 L: 300 O: 2000 3-mercapto-propyl tri-
methoxysilane 98.67 1.62 98.36 1.9 -0.31 0.28    Example 9-L: 300 O: 5000 99.04 0.54 98.98 0.92 -0.06 0.38   Example 10 L: 300 O: 2000 nDA Polyester 98.79 1.37 98.47 1.88 -0.32 0.51    Example 10-L: 300 O: 5000 98.95 0.56 98.68 1.05 -0.27 0.49    Example 11 L: 300 O: 2000 3 3-mercapto-propyl tri-
methoxysilane 98.72 1.34 98.59 1.58 -0.13 0.24     Example 11 ▩L: 300 O: 5000 98.89 0.63 98.71 0.84 -0.18 0.21

Heat resistant 100 ℃   Surface treatment    Adhesive    Initial optical properties    Optical characteristics after 250 hours Optical characteristic change rate    reflectivity   Y.I.   reflectivity  Y.I.     △ Reflectance  ΔY.I.    Example 6 L: 300 O: 2000 nDA Acrylic 98.69 1.44 98.45 1.89 -0.24 0.45     Example 6-L: 300 O: 5000 98.89 0.66 98.6 1.15 -0.29 0.49   Example 7 L: 300 O: 2000 3-mercapto-propyl tri-
methoxysilane 98.64 1.42 98.59 1.73 -0.05 0.31    Example 7-L: 300 O: 5000 98.83 0.67 98.56 0.86 -0.27 0.19  Example 8 L: 300 O: 2000 nDA Poly-
siloxane 98.65 1.54 98.27 2.1 -0.38 0.56    Example 8-L: 300 O: 5000 99.11 0.52 98.64 1.11 -0.47 0.59   Example 9 L: 300 O: 2000 3-mercapto-propyl tri-
methoxysilane 98.67 1.62 98.58 2.02 -0.09 0.40    Example 9-L: 300 O: 5000 99.04 0.54 98.99 0.88 -0.05 0.34   Example 10 L: 300 O: 2000 nDA Polyester 98.79 1.37 98.53 1.83 -0.26 0.46    Example 10-L: 300 O: 5000 98.95 0.56 98.72 1.12 -0.23 0.56    Example 11 L: 300 O: 2000 3 3-mercapto-propyl tri-
methoxysilane 98.72 1.34 98.64 1.65 -0.08 0.31     Example 11 ▩L: 300 O: 5000 98.89 0.63 98.83 0.83 -0.06 0.20

As such, when the surface treatment is performed, it is possible to provide excellent weather resistance to the metal layer, thereby simultaneously securing physical and chemical weather resistance. When the adhesive layer is pattern-printed to form the adhesive pattern layer, it is possible to provide excellent optical characteristics such as maintaining high air reflectance and brightness by maintaining an air gap.

10: Base substrate (PET)
20: Primer layer
30: Ag layer
40: surface treatment layer
50: adhesive layer
60: protective film (PET)

Claims (28)

a) providing a metal layer on the base layer; And
b) forming a surface treatment layer on the metal layer with a surface treating agent including at least one selected from a silane coupling agent and an acid compound. Manufacturing method. The method according to claim 1,
In the step a), the metal layer is formed of a silver (Ag) ink coating solution,
The silver (Ag) ink coating solution is a silver complex compound obtained by reacting at least one silver compound of formula (1) with one or two or more ammonium carbamate or ammonium carbonate compounds selected from formulas (2) to (4): Method for producing a metal thin film, characterized in that it contains.
[Formula 1]

(2)

(3)

[Chemical Formula 4]

In the above formulas,
X is from oxygen, sulfur, halogen, cyano, cyanate, carbonate, nitrate, nitrite, sulfate, phosphate, thiocyanate, chlorate, perchlorate, tetrafluoroborate, acetylacetonate, carboxylate and derivatives thereof Substituent is selected, n is an integer of 1 to 4, R1 to R6 are independently of each other hydrogen, C1-C30 aliphatic or alicyclic alkyl group, aryl or aralkyl group, alkyl and aryl substituted functional group And a substituent selected from a heterocyclic compound, a high molecular compound and derivatives thereof, except that all of R 1 to R 6 are hydrogen. The method according to claim 1,
The method of manufacturing a metal thin film, characterized in that it further comprises the step of providing a primer layer between the base layer and the metal layer in step a). The method according to claim 1,
In the step a), the metal layer has a thickness of 0.05 μm to 0.4 μm. The method according to claim 1,
In the step b), the surface treatment agent is prepared by adding a solvent to at least one selected from the silane coupling agent and the acid compound,
Based on 100 parts by weight of the surface treating agent, at least one selected from the silane coupling agent and the acid compound is added in an amount of 0.005 to 50 parts by weight, and the solvent is prepared by adding 50 to 99.995 parts by weight. Method for producing a metal thin film, characterized in that. The method according to claim 1,
In step b), the silane coupling agent is 3-Mercaptopropyltrimethoxysilane, Methyltrimethoxysilane, TetraEthoxysilane, Trimethylorthosilicate, Methyltriethoxysilane, Dimethyldimethoxysilane, Propyltrimethoxysilane, Propyltriethoxysilane, Trimethoxy (octadecyl) silane, Isobutyltrimethoxysilane, Isobutyltriethoxymethoxyyl, Phenoxytriethoxysilane, Method for producing a metal thin film comprising at least one silane compound selected from among. The method according to claim 1,
The acid compound in step b) is a metal, characterized in that it comprises one or more selected from Oleic acid, Neodecanoic acid, Valeric acid, Lauric acid, Malvalic acid, Decanoic acid, Butyric acid, and Heptanoic acid Method of manufacturing a thin film. The method according to claim 1,
In the step b), the surface treatment agent, the method for producing a metal thin film, characterized in that it further comprises an inorganic filler. The method according to claim 8,
In the step b), the surface treating agent is prepared by adding a solvent to at least one selected from the silane coupling agent and the acid compound and the inorganic filler,
Based on 100 parts by weight of the surface treating agent, at least one selected from the silane coupling agent and the acid compound is added in an amount of 0.005 to 50 parts by weight, and the inorganic filler is added in an amount of 0.01 to 0.1 parts by weight, Method for producing a metal thin film, characterized in that the solvent was prepared by adding 49.9 to 99.998 parts by weight. The method according to claim 8,
The inorganic filler of step b) is MgO, ZnO, SiO ₂ , TiO _{2 The} method for producing a metal thin film, characterized in that it comprises one or more selected from. The method according to claim 1,
In the step b), microgravure coating, gravure coating, flexo coating, spin coating, slot die coating, lip coating And the surface treatment layer is formed using the method selected from spray coating. The method according to claim 1,
c) forming an adhesive pattern layer in which an adhesive is patterned in a predetermined pattern on the surface treatment layer. The method of claim 12,
The adhesive in the step c), a method for producing a metal thin film, characterized in that using at least one adhesive selected from acrylic, polysiloxane, and polyester (Polyester) adhesive. The method of claim 12,
In the step c), the adhesive, based on 100 parts by weight of the total, based on 100 parts by weight of the adhesive solid content of the metal thin film, characterized in that it comprises 49 to 96 parts by weight of inorganic filler, 0.01 to 1 parts by weight, and solvent Way. The method according to claim 14,
As the adhesive solid content, at least one selected from an acrylic resin, a polysiloxane resin, and a polyester resin is used. The method according to claim 14,
The inorganic filler is a method for producing a metal thin film, characterized in that it comprises at least one selected from Al ₂ O ₃ , SiO ₂ , and TiO ₂ . The method of claim 12,
In the step c), the adhesive pattern layer is a method of manufacturing a metal thin film, characterized in that formed in a linear pattern or a polygonal pattern or a pattern of a mixture thereof. 18. The method of claim 17,
The polygonal pattern is a hexagonal mesh (Honeycomb), square mesh, circle (Dot), triangular mesh, or a method of manufacturing a metal thin film, characterized in that the mesh pattern of a mixture thereof. The method of claim 12,
In the step c), the pattern is a method of manufacturing a metal thin film, characterized in that the line width is 0.1 ㎛ ~ 5000㎛. The method of claim 12,
The air gap of the pattern in the step c) is a manufacturing method of a metal thin film, characterized in that 100㎛ ~ 10000㎛. The method of claim 12,
In the step c), the adhesive pattern layer may include direct gravure printing, flexography printing, gravure offset, imprint, lithography printing, and screen printing. Screen printing), and Rotary screen printing (Rotary screen printing) method of manufacturing a metal thin film, characterized in that formed by printing the adhesive. The method of claim 12,
d) manufacturing a metal thin film further comprising the step of providing a protective film on the adhesive pattern layer. 23. The method of claim 22,
In the step d), a method of manufacturing a metal thin film, characterized in that for laminating the adhesive pattern layer and the protective film using a laminator. 23. The method of claim 22,
The protective film in the step d), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyether sulfone (PES), nylon (Nylon), polytetrafluoroethylene (PTFE), polycarbonate (PC), Method for producing a metal thin film, characterized in that the film selected from cellophane (Cellophane), polyarylate (PAR), and polyimide (PI). 23. The method of claim 22,
In the step d), the thickness of the protective film is a manufacturing method of a metal thin film, characterized in that 10 ~ 200㎛. The metal thin film manufactured by the manufacturing method of any one of Claims 1-25. 27. The method of claim 26,
The metal thin film is a metal thin film, characterized in that for reflection film. A backlight unit comprising the metal thin film according to claim 27.

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