KR20050092847A - Solar control film and method for preparation thereof - Google Patents

Abstract

The present invention can provide a desired pattern by providing a partial metal deposition layer between the first and the second plastic film layer, thereby improving the simple appearance of the conventional metal deposition film and having an aesthetic effect while having excellent sunlight control function It is to provide a solar control film and a method of manufacturing the same to satisfy the phosphorus function.

The solar control film of the present invention comprises a first plastic film layer; A protective resin layer formed on the first plastic film layer; A second plastic film layer adhered to a rear surface of the first plastic film layer; A partial metal deposition layer provided on the second plastic film layer and formed on an opposite surface to be bonded to the first plastic film layer and having a deposition pattern in the shape of a mask by attaching a mask; And an adhesive layer formed on the rear surface of the second plastic film layer.

Description

Solar control film and method for manufacturing same

The present invention relates to a solar control film attached to a vehicle window of a vehicle or a glass of a building to selectively block specific components of sunlight such as ultraviolet rays or infrared rays, and more particularly, not only a solar control function but also a beautifully constructed glass window. It relates to a solar control film that can put a desired pattern on the solar control film through the partial metal deposition to be decorated.

In general, the solar control film is attached to the window of the car or building to control the sun's rays and the sun's heat, block direct sunlight transmission, block harmful ultraviolet rays, improve air-conditioning efficiency and control the transmission of visible light It is used in various ways with the function of protecting the privacy and preventing incidents caused by glass breakage.

Such a solar control film has a function of beautifully decorating the exterior of a car or a building in which the solar control film is constructed, as well as functioning by being attached to a glass window.

As such, the method of depositing a metal such as aluminum on a film has been used to satisfy both a functional aspect such as control of sunlight and an aesthetic aspect beautifully decorating the appearance. The solar control film applied with the metal deposition film not only has excellent blocking performance against infrared rays as well as visible light, but also looks metallic in appearance and can decorate the glass window to which the film is applied.

The solar control film using the metal deposition has been applied to a variety of manufacturing methods to improve the aesthetic function, for example, by changing the concentration of the metal deposition sequentially from one end of the glass window to the other end The concentration of metal gloss may be sequentially changed, and the color may be realized by applying color to a surface adjacent to the metal deposition layer.

However, in the conventional solar control film as described above, there is a problem that the metal deposition layer can simply change the density or color of the metallic gloss, but cannot put a desired pattern.

An object of the present invention has been researched and developed in order to solve the above-mentioned conventional problems, it is possible to put the desired pattern by providing a partial metal deposition layer between the first and second plastic film layer, thereby It is to provide a solar control film and a method of manufacturing the same to improve the simple appearance of the metal deposition film to satisfy the aesthetic function while having excellent solar control function.

The solar control film of the present invention for achieving the above object is a first plastic film layer, a protective resin layer formed on the first plastic film layer, a second plastic film adhered to the back of the first plastic film layer Layer, a partial metal deposition layer provided on the second plastic film layer and formed on an opposite side to be bonded to the first plastic film layer and having a deposition pattern in the shape of a mask by attaching a mask, and on the second plastic film layer It characterized in that it comprises an adhesive layer formed on the back of the.

The metal deposition layer is formed by depositing only a desired portion using a mask having a specific shape to form a desired specific pattern, and may include aluminum, copper or zinc as well as alloys thereof. The thickness of the metal deposition layer is preferably 20 ~ 200Å, and the reason for limiting the thickness of the metal deposition layer in this way is that it is enough to obtain the control characteristics and aesthetic effect of sunlight.

The method of manufacturing a solar control film according to the present invention includes the steps of providing a first plastic film layer and a second plastic film layer, forming a protective resin layer by applying a resin composition on one surface of the first plastic film layer, Providing a metal deposition layer having a desired pattern by resistive heating on a metal material while applying a mask having a specific shape on one surface of the second plastic film layer, and formed on the second plastic film layer on a rear surface of the first plastic layer Adhering a surface of the metal deposition layer and providing a pressure-sensitive adhesive layer on the rear surface of the second plastic layer.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is an enlarged cross-sectional view of the solar control film of the embodiment according to the present invention.

As shown in the figure, the solar control film of the present invention is a protective resin layer 210, the first plastic film layer 220, the first adhesive layer 230, the partial metal deposition layer 240, the second plastic film The layer 250, the second adhesive layer 260, the release layer 270, and the third plastic film layer 280 have a laminated structure. The release layer 270 and the third plastic film layer 280 is provided for ease of handling of the final product, it is clear that it is not an essential component of the control film of the present invention.

The protective resin layer 210 is formed of a photocurable resin, and serves to protect the first plastic film layer 220 from external physical impact and to impart wear resistance of the film.

Referring to the manufacturing method of the protective resin layer 210, first, a conventional photocurable oligomer, a photocurable monomer, a photopolymerization initiator are mixed with a diluting solvent to prepare a solution. Subsequently, the solution is applied to the first plastic film layer 220 by conventional application means, for example, microgravure, gravure, or mayer bar, followed by preliminary drying, and then irradiated with ultraviolet rays to cure the coating film. The thickness of the cured protective resin layer 210 is preferably in the range of 1.5 ~ 5㎛. The reason for limiting the thickness of the protective resin layer 210 is that when the thickness is thinner than 1.5㎛, the wear resistance and strength that the protective resin layer should have falls, and when the thickness is 5㎛ or more, UV curing is not easily performed in the production process. Because it does not.

As the photocurable oligomer, conventional oligomers such as urethane acrylate, urethane methacrylate, epoxy acrylate, epoxy noblock acrylate, polyester acrylate and polybutadiene acrylate can be used, and benzyldimethyl as the photopolymerization initiator. Ketal, benzoin butyl ether, trimethylbenzophenone, alpha-hydroxy ketone, benzophenone and the like can be used.

Methyl ethyl ketone, toluene, isopropyl alcohol may be used as the diluting solvent.

The first plastic film layer 220 under the protective resin layer 210 serves as a base material for the application of the protective resin layer 210. The first plastic film layer is preferably formed by a biaxially oriented transparent film such as polyethylene terephthalate. Moreover, it is preferable that the thickness exists in the range of 10-100 micrometers. The first plastic film layer 220 adopts the most common PET film as a biaxially oriented transparent film, and the reason for limiting the thickness is that when the thickness becomes thinner than 10 μm, appearance problems such as wrinkles occur in the coating process are likely to occur. If it is thicker than 100㎛, it is difficult to install the product.

 The first adhesive layer 230 below the first plastic film layer 220 bonds the first plastic film layer 220 and the second plastic film layer 250 to each other. The first adhesive layer 230 is composed of an acrylic resin, a curing agent, a ultraviolet absorber and a diluent solvent. The ultraviolet absorber blocks the incident ultraviolet rays and prevents fading of the solar control film. The first adhesive layer 230 may include a dye as necessary.

The acrylic resin is methyl methacrylate, ethyl methacrylate, isobuty methacrylate, n-butyl methacrylate, n-butyl methyl methacrylate, acrylic acid, methacrylic acid, itaconic acid, hydroxyethyl methacrylate. Acrylate, hydroxypropyl methacrylate, hydroxyethyl acrylate acrylamide, methylol acrylamide, crycidyl methacrylate, ethyl acrylate, isobutyl acrylate, n-butyl acrylate and 2-ethylhexyl acrylate Among the polymers, copolymers thereof or terpolymers thereof can be used.

As the curing agent, melamine formaldehyde, urea formaldehyde, polyisocyanate, polyaziridine, zirconium composite, epoxy compound, zinc oxide or magnesium oxide, and the like are suitable.

As the ultraviolet absorber, 2-hydroxy-4-methoxybenzophenone, 2,2'-dihydroxybenzophenone, 2-hydroxy-4-methoxy-2'-carboxybenzophenone or 2-hydroxy- 4-methoxy-5-sulfobenzophenone trihydrate and the like are suitable.

Suitable diluents for the pressure-sensitive adhesive layer composition include methyl ethyl ketone, toluene, isopropyl alcohol or ethyl acetate. The first adhesive layer 230 may be formed of, for example, 100 parts by weight of an acrylic resin, 1 part by weight of a curing agent, 1 part by weight of an ultraviolet absorber, and an appropriate amount of a solvent, which is applied to the rear surface of the first plastic film layer 220. And dry.

The composition of the first adhesive layer 230 described above is merely an example, and it is also possible to use any adhesive material replaceable well known to those skilled in the art.

A partial metal deposition layer 240 is formed on an opposite surface of the first adhesive layer 230 on the second plastic film layer 250, and the partial metal deposition layer 240 is formed of a metal for controlling sunlight and aesthetic effect. It is preferable that this deposited part has a thickness of 20-200 GPa.

Aluminum is suitable as the material of the metal deposition layer 240, and other metals such as copper, zinc, or alloys thereof may be used.

In the present invention, the metal deposition layer 240 may be formed by a conventional vapor deposition method. For example, aluminum can be formed by vapor deposition by resistance heating under high vacuum.

The second plastic layer 250 serves as a base material on which the partial metal deposition layer 240 is formed. In order to form the partial metal deposition layer 240, a mask having a specific shape is attached on the second plastic layer 250, and then metal is deposited.

The mask is generally a material such as polyethylene terephthalate film is excellent in mechanical strength and easy to cut and an adhesive layer is formed on one side is easy to attach and remove. When the mask is attached and subjected to the metal deposition process, a partial metal deposition layer 240 is formed on the surface of the second plastic layer 250, and a metal deposition layer is formed on the portion where the mask is not attached and the mask is attached. The metal deposition layer is not formed at the portion.

As described above, the desired metal deposition pattern may be formed by changing the shape of the mask. After the metal deposition, the mask is removed to complete the partial metal deposition layer 240.

The second plastic film layer 250 may be a polyethylene terephthalate biaxially oriented transparent film of the same material as the first plastic film layer, the thickness is preferably 10 ~ 50㎛. The second plastic film layer 250 should be a biaxially stretched transparent film and the reason for limiting the thickness is also the same as the first plastic film layer 220, but only because the upper limit of the thickness is relatively thin This is because it does not need to be thicker than the thickness of the first plastic film layer (10 to 100 µm) because the role of providing the deposition layer into the multilayer structure is greater than the function.

A second adhesive layer 260 is formed below the second plastic film layer 250, and the second adhesive layer 260 allows the solar light control film to adhere to a glass base material such as a windshield. The second adhesive layer 260 may be manufactured by applying and drying the back surface of the second plastic film layer 250 using the same material and method as the first adhesive layer 230.

A release layer 270 and a third plastic film layer 280 are formed below the second adhesive layer 260, and the release layer 270 and the third plastic film layer 280 are constructed of a product. By protecting the film to facilitate handling of the film until peeling, the film is peeled off from the second adhesive layer 260 during construction of the product.

The release layer 270 may be formed of a conventional silicon-based release agent. For example, a solution including 100 parts by weight of a silicone-based release agent, 1 part by weight of a curing agent, and an appropriate amount of a solvent may be applied to the third plastic film layer 280 and dried.

The third plastic film layer 280 may be manufactured using a polyethylene terephthalate biaxially oriented film like the first and second plastic film layers 220 and 250, and the thickness thereof is preferably 10 to 50 μm. Do. The third plastic film layer 280 should be a biaxially stretched transparent film and the reason for limiting the thickness is also the same as the first plastic film layer 220, but only the reason why the upper limit is relatively thin is discarded during construction It is because it does not need to make thickness especially since it is a film which comprises a release film.

For the solar control film of the present invention described above will be described the manufacturing method. First, the composition of the protective resin layer 210 is applied to one surface of the first plastic film layer 220, dried in a hot air oven, and then cured with ultraviolet rays.

Meanwhile, a mask having a desired shape is attached to the second plastic film layer 250 to deposit a metal by a resistance heating method under high vacuum, and then remove the mask to form a partial metal deposition layer 240. Subsequently, the first plastic layer 220 and the second plastic layer 250 are stacked as the first adhesive layer 230.

Next, after manufacturing the release film by laminating the third plastic film layer 280 and the release layer 270, the second adhesive layer 260 is provided on the back surface of the second plastic film layer 250 In addition, the release film is laminated on the second plastic film layer 250.

Hereinafter, the present invention will be described in more detail through preferred embodiments.

The present invention has been described in detail based on the embodiments, but the present invention is not limited to the embodiments. The conditions of Examples 1 and 2 and Comparative Examples 3 and 4 are as shown in Table 1.

<Example 1>

A biaxially stretched polyethylene terephthalate film having a thickness of 23 μm, which is Kolon's product name Astroll, was used as the first plastic film layer 220, and the composition consisting of the materials listed in Table 1 on one side of the film was methylethyl. Dilution with ketone and toluene was carried out using a Meyer bar, and then uniformly applied to a thickness of 2㎛ and dried in an 80 ℃ hot air oven.

KF2121 in Table 1 is a photocurable resin containing a urethane acrylate oligomer and an acrylate monomer under the trade name of Kolon Corporation. Subsequently, the film coated with the ultraviolet curing device was cured to form the protective resin layer 210. Then, on the back surface of the first plastic film layer 220 on which the protective resin layer 210 is formed, the pressure-sensitive adhesive layer composition listed in Table 1 is diluted in methyl ethyl ketone and toluene, so that the dry coater has a dry thickness of about 15 μm. Using to uniformly apply and dry to form a first adhesive layer 230.

Separately, a biaxially stretched polyethylene terephthalate film (Kolon Corporation Astro) having a thickness of 23 µm was used as the second plastic film layer 250, and a mask made of a polyethylene terephthalate film having a specific shape was attached to one side of the film, and the purity was 99.99%. After the deposition of aluminum under a high vacuum by a resistance heating method to remove the mask to form a partial metal deposition layer 240 having a metal deposition pattern, such as the shape of the mask, the first adhesive layer 230 is laminated It was laminated on the first plastic layer 220.

Next, the second adhesive layer 260 was formed on the back surface of the second plastic film layer 250 by the same composition and method as the first adhesive layer 230. The release film prepared by applying a releasing film of ShinEtsu's silicone release agent to gravure on a third plastic film layer 280 made of a biaxially stretched polyethylene terephthalate film (KOLON's astrol) having a thickness of 23 μm was prepared. 2 was laminated on the adhesive layer 260 to prepare a solar control film.

The appearance and solar control properties of each film thus prepared were measured. To this end, the release film was peeled off from each film prepared, and the remaining film was attached to a glass plate having a thickness of 3 mm. The visible light transmittance and the UV blocking rate were measured using a Shimadzu UV spectrometer UV-3101PC.

Visible light transmittance was measured in the 380-780 nm band and UV-blocking rate in the 300-380 nm band, respectively. Here, the measured value means an average value in the wavelength band, and the measurement result is shown in Table 2.

<Example 2>

Except for the composition of Example 1 and the first adhesive layer 230, the same solar control film with the same composition and structure was prepared. The first adhesive layer 230 was colored by adding a dye (Cibasa orazole) to the composition of Example 1, the composition and structure thereof are shown in Table 1. The release film was peeled off each of the prepared films, and the appearance and solar control characteristics were measured in the same manner as in Example 1 above. The measurement results are shown in Table 2.

Comparative Example 3

A solar control film having the same composition and structure as in Example 1 and the partial metal deposition layer 240 was prepared. Unlike the partial metal deposition layer 240 of Example 1, a uniform metal deposition was performed without a mask during metal deposition, and its composition and structure are shown in Table 1. The release film was peeled off each of the prepared films, and the appearance and solar control properties were measured in the same manner as in Example 1 described above. The measurement results are shown in Table 2.

Comparative Example 4

Except for Example 2 and the partial metal deposition layer 240, a solar control film having the same composition and structure was prepared. Unlike the partial metal deposition layer 240 of Example 1, a uniform metal deposition was performed without a mask during metal deposition, and its composition and structure are shown in Table 1 below. The release film was peeled off each of the prepared films, and the appearance and solar control characteristics were measured in the same manner as in Example 1 above. The measurement results are shown in Table 2.

                                                         (Unit: parts by weight) Example Comparative Example One 2 3 4 rescue Protective Resin Layer ○ ○ ○ ○ First plastic film layer ○ ○ ○ ○ 1st adhesion layer (dye) ○ (×) ○ (○) ○ (×) ○ (○) Metal deposition layer part part all all Third plastic film layer ○ ○ ○ ○ 2nd adhesion layer ○ ○ ○ ○ Release layer ○ ○ ○ ○ 2nd plastic adhesive layer ○ ○ ○ ○ Protective Resin Layer KF2121 (KOLON Corporation) 100 100 100 100 Adhesive layer Methyl methacrylate resin 100 100 100 100 Polyisocyanate One One One One 2-hydroxy-4-methoxybenzophenone One One One One Orasol (manufactured by Ciba) 0 2 0 2

Evaluation method Example Comparative Example One 2 4 5 Appearance (pattern) ○ ○ × × color × ○ × ○ Visible light transmittance (%) 30 20 30 20 UV protection rate (%) 99 99 99 99

From the results of Table 2, the solar control film comprising a partial metal deposition layer in the present invention can implement a color with a desired pattern and exhibits the same sunlight control function as a conventional metal deposition film.

As described above, the solar control film and the method for manufacturing the same according to the present invention, by providing a partial metal deposition layer between the first and the second plastic film layer can be put a desired pattern, thereby the conventional metal By improving the simple appearance of the deposition film is a useful invention that can satisfy the aesthetic function while having excellent sunlight control function.

1 is an enlarged cross-sectional view showing a solar control film according to the present invention.

<Explanation of symbols for main parts of drawing>

210: protective resin layer 220: first plastic film layer

230,260: adhesion layer 240: partial metal deposition layer

250: second plastic film layer 270: release layer

280: third plastic film layer

Claims (4)

A first plastic film layer; A protective resin layer formed on the first plastic film layer; A second plastic film layer adhered to a rear surface of the first plastic film layer; A partial metal deposition layer provided on the second plastic film layer and formed on an opposite surface to be bonded to the first plastic film layer and having a deposition pattern in the shape of a mask by attaching a mask; And And a pressure-sensitive adhesive layer formed on the rear surface of the second plastic film layer. The method of claim 1, The metal deposition layer is a solar control film, characterized in that containing aluminum, copper or zinc. The method of claim 1, The metal deposition layer is a solar control film, characterized in that the thickness of 20 ~ 200Å. Providing a first plastic plume layer and a second plastic plume layer; Forming a protective resin layer on one surface of the first plastic film layer; Providing a metal deposition layer having a desired pattern by using a resistive heating method on a metal material while applying a mask having a specific shape on one surface of the second plastic film layer; Adhering a surface of the metal deposition layer formed on the second plastic film layer to a rear surface of the first plastic layer, and The method of manufacturing a solar control film comprising the step of providing an adhesive layer on the back of the second plastic layer.