KR20050010191A - Solar control film - Google Patents

Abstract

PURPOSE: A solar control film is provided to embody two or more colors to an indoor and an outdoor, thereby applying an elegant appearance and a color freely and to have a good solar control effect. CONSTITUTION: The solar control film comprises an antiscratching protective layer(101), a first color sticking layer(102), a metal deposition layer(103), a third plastic film layer(3000), a second color sticking layer(112), a release layer(104) and a second plastic film layer(2000), in order. The first and the second color sticking layers have different colors respectively. The metal deposition layer is formed in a whole side or a part of the third plastic film layer.

Description

Solar control film {Solar control film}

The present invention relates to a solar control film, and more particularly, it is possible to implement two or more different colors indoors and outdoors by attaching to glass such as a car, a building, an exhibition hall, etc. The present invention relates to a solar control film capable of obtaining an excellent solar heat control effect of the metal deposition layer.

The solar control film, which is attached to the windows of automobiles or buildings, controls the sun's rays, blocks harmful UV rays, improves cooling and heating efficiency, and protects the privacy of individuals by controlling the transmission of visible rays. It is widely used for reasons such as preventing secondary accidents caused by breakage of glass windows.

In addition to these functional effects, the solar control film has a function to beautifully decorate the exterior of the car or building, the demand for solar control film is increasing.

Referring to the conventional solar control film structure with reference to Figure 1, by applying a colored adhesive to the plastic film layer 10 to form a colored adhesive layer (2), or by dyeing the plastic film layer to have a constant color The sun control film was made to display only one color.

In this case, the color of the glass window with the solar control film has no difference in color when viewed indoors or outdoors, and color expression is limited to colors that do not cause eye irritation. Therefore, it is difficult to apply intense colors such as primary colors. there was.

In addition, the conventional solar control film is a product to apply a metal deposition layer to have a metallic luster at the same time as the color indicated by the dye, in this case, in the case where the solar control film is applied to the outdoors, but also a metallic luster Except for the indoor or outdoor, there is no difference in the color itself, so only monotonous expression is possible in terms of color like the monochromatic solar control film described above.

Thus, the inventors of the present invention while researching to solve the problem of monochromatic color indoors and outdoors when the solar control film is applied to the glass of a car or building, two colored adhesive layers applying different dyes As a result of manufacturing a solar control film by laminating a metal deposition layer therebetween, the interior and exterior colors of the solar control film are differently expressed to provide a beautiful appearance and to realize a free color. It was completed.

Accordingly, it is an object of the present invention to provide a solar control film in which the colors of the indoor and outdoor appear different.

The solar control film for achieving this purpose is a scratch protection layer, the first plastic film layer, the first colored adhesive layer, the metal deposition layer, the third plastic film layer, the second colored adhesive layer, the release layer and the second The plastic film layer is characterized in that it has a structure laminated sequentially.

1 is a cross-sectional view showing the structure of a conventional solar control film,

Figure 2 is a cross-sectional view showing the structure of the solar control film prepared according to the present invention.

<Brief description of symbols for main parts of the drawings>

1,101: scratch protection layer 2: colored adhesive layer

10,1000: first plastic film layer 20,2000: second plastic film layer

102: first colored adhesive layer 103: metal deposition layer

112: second colored adhesive layer 4,104: release layer

3000: third plastic film layer

The present invention will be described in more detail as follows.

The structure of the solar control film according to the present invention, as shown in Figure 2, the scratch protection layer 101, the first plastic film layer 1000, the first colored adhesive layer 102, the metal deposition layer 103 The third plastic film layer 3000, the second colored adhesive layer 112, the release layer 104, and the second plastic film layer 2000 are sequentially stacked.

In the present invention, in order to express the colors of the indoor and outdoor differently, it is included as a new structure of the first colored adhesive layer 102, the metal deposited layer 103, and the second colored adhesive layer 112. Looking at each layer in detail according to the structure as follows.

(1) scratch protection layer

The anti-scratch protective layer 101 of the present invention serves to protect the first plastic film layer 1000 from external physical shocks to prevent scratches and to impart wear resistance, and is made of a conventional UV curable resin.

The material constituting the protective layer is a photocurable oligomer, a photocurable monomer, a photoinitiator and a dilution solvent, and is preliminarily dried by applying microgravure, gravure, or mayer on the first plastic film layer 1000, and then irradiating with ultraviolet rays. To harden the coating to form the first plastic film layer 1000 having a hard surface.

At this time, examples of the photocurable oligomer used are urethane acrylate, urethane methacrylate, epoxy acrylate, epoxy noblock acrylate, polyester acrylate and polybutadiene acrylate.

Examples of the photocurable monomer include dipentaerythritol hexaacrylate, 1-hydroxycyclohexylphenyl ketone, isobornyl acrylate, 1,6-hexanediol diacrylate, and pentaerythritol triacrylate.

Further, photoinitiators include benzyl dimethyl ketal, benzoin butyl ether, trimethyl benzophenone, alpha-hydroxy ketone and benzophenone.

In addition, the diluting solvent of the composition is methyl ethyl ketone (MEK), toluene and ethyl acetate.

Generally, it is preferable that the thickness of the protection layer 101 for a scratch prevention is 1.5-5 micrometers.

(2) the first plastic film layer

As the layer to which the anti-scratch protective layer 101 is applied, a polyethylene terephthalate biaxially oriented film is suitable, and a transparent film having a thickness of 10 to 100 μm is preferable.

(3) Colored adhesive layer

The colored adhesive layer has a function of controlling the sunlight by applying a color to the pressure-sensitive adhesive using a dye, and includes an acrylic resin, a curing agent, a dye, an ultraviolet absorber, and a diluting solvent.

The acrylic resin used at this time is methyl methacrylate, ethyl methacrylate, isobutyl methacrylate, n-butyl methacrylate, n-butyl methyl methacrylate, acrylic acid, methacrylic acid, itaconic acid, hydroxyethyl Methacrylate, hydroxypropyl methacrylate, hydroxyethyl acrylate, acrylamide, methylol acrylamide, crycidyl methacrylate, ethyl acrylate, isobutyl acrylate, n-butyl acrylate and 2-ethylhexyl Polymers selected from acrylates, copolymers thereof or terpolymers thereof.

Examples of the curing agent include melamine formaldehyde, urea formaldehyde, polyisocyanate, polyaziridine, zirconium composite, epoxy compound, zinc oxide, magnesium oxide and the like.

In addition, the ultraviolet control film absorbs ultraviolet rays to block ultraviolet rays, and adds an ultraviolet absorber to perform the function of preventing the fading of the solar control film, for example, 2-hydroxy-4-methoxy Benzophenone, 2,2'-dihydroxybenzophenone, 2-hydroxy-4-methoxy-2'-carboxybenzophenone, 2-hydroxy-4-methoxy-5-sulfobenzophenone trihydrate, etc. There is this.

In addition, the dye used to produce a color may include a dye that can produce a variety of colors. As such, the color that is expressed when applying the finally manufactured solar control film by using different dyes in the first colored adhesive layer and the second colored adhesive layer is also different. These dyes may be used alone, or may be used in combination to achieve a desired color.

In addition, the diluting solvent of the composition is methyl ethyl ketone (MEK), toluene or ethyl acetate.

The colored adhesive layer used in the present invention includes an acrylic resin, a curing agent, a dye capable of implementing an appropriate color, an ultraviolet absorber, and a diluent solvent, and when applied and dried on the first plastic film layer 1000, the first colored adhesive layer Get 102.

The second colored adhesive layer 112 is obtained by applying and drying the third plastic film layer 3000 on which the metal deposition layer 103 is laminated. The first colored adhesive layer 102 and the second colored adhesive layer 112 have different colors.

(4) metal deposition layer

The metal deposition layer 103 is formed by depositing a metal on the third plastic film layer 3000 to generate a metal reflective surface. In general, aluminum is deposited by resistance heating under high vacuum. Here, the metal deposition layer is deposited on the third plastic film layer 3000 to a thickness of 20 to 200 Å so as to exhibit a constant level of visible light transmittance. The deposition layer is controlled by adjusting the deposition portion and the deposition thickness of the metal deposition layer. By being deposited on all or part of the film, it is possible to obtain a solar control film having various colors.

The metal deposition layer 103 has a solar gloss control film having a metallic luster appearance and exerts an infrared blocking effect by the metal to prevent heat from entering through the glass window, as well as the two colored adhesive layers within the structure of the present invention ( 102, 112) by optically giving a different color to the indoor and outdoor respectively.

That is, after the construction of the solar control film by the metal deposition layer 103 makes the color of the first colored adhesive layer 102 in the outdoors, the color of the second colored adhesive layer 112 in the interior.

In this case, when the metal deposition layer 103 is applied to the entire film 3000, the color of the solar control film that can be seen outdoors is the color of the first colored adhesive layer 102 and the metallic color of the metal deposition layer 103. This is a mixed form, the color of the second colored adhesive layer 112 in the room.

In addition, when the metal deposition layer 103 is applied to a part of the film 3000, the color of the first colored adhesive layer 102 and the metallic color of the metal deposition layer 103 are applied at the portion where the metal deposition layer 103 is applied. In the mixed form, the colors of the two colored adhesive layers 102 and 112 are mixed in the portion where the metal deposition layer 103 is not applied.

On the other hand, in the indoor solar control film is the color of the second colored adhesive layer 112, the color of the second colored adhesive layer 112 is shown in a darker form in the portion where the metal deposition layer is applied, but the metallic color Does not appear.

(5) third plastic film layer

The third plastic film layer 3000 for depositing the metal deposition layer 103 is preferably a polyethylene terephthalate biaxially oriented film, the thickness of which is preferably a transparent film having a thickness of 10 to 50㎛.

(6) release layer and second plastic film layer

The release layer 104 and the second plastic film layer 2000 are laminated for the purpose of protecting the second colored adhesive layer 112 until the construction of the product and peeled from the second colored adhesive layer 112 during the construction of the product. Allow the transparent adhesive layer to adhere to the glass. The release layer 104 is composed of a silicone-based release agent, a curing agent and an appropriate amount of solvent, and is applied to the second plastic film layer 2000 and dried. The second plastic film layer 2000 is preferably a polyethylene terephthalate biaxially oriented film, the thickness of which is preferably a transparent film of 10 to 50㎛.

As described above, the protective layer for preventing scratches, the first plastic film layer, the first colored adhesive layer, the third plastic film layer, the second colored adhesive layer, the release layer, and the second plastic film layer are sequentially laminated. The manufacturing method of the solar control film is as follows.

First, the composition of the anti-scratch protective layer 101 is applied to one surface of the first plastic film layer 1000, dried in a hot air oven, cured with ultraviolet rays, and the metal is resistively heated under high vacuum to the third plastic film layer 3000. The deposition layer 103 is formed to laminate these two films with the first colored adhesive layer 102. Next, after laminating the second colored adhesive layer 112 on the other side of the third plastic film layer 3000, the release film in which the release layer 104 is laminated on the second plastic film layer 2000 is completed. Let's do it.

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

Examples 1-2

A biaxially stretched polyethylene terephthalate film having a thickness of 25 µm (Astroll, Co., Ltd.) was used as the first plastic film layer 1000, and a protective agent for preventing scratches having a composition of Table 1 on one side of the film was methyl ethyl ketone. After diluting with toluene and using a Meyer bar to uniformly apply a thickness of 2㎛, dried in 80 ℃ hot air oven, and cured with an ultraviolet curing device to form a protective layer 101 for preventing scratches. Next, the colored adhesive layer composition of the following Table 1 was diluted in methyl ethyl ketone and ethyl acetate on the opposite side of the film 1000 on which the scratch protection layer 101 was formed, and then dried using a coma coater to have a thickness of 15 μm. And uniformly applied and dried to form a first colored adhesive layer 102.

Separately, resistance heating under high vacuum is performed using a biaxially stretched polyethylene terephthalate film (Kolon, Astroll) having a thickness of 25 μm as a third plastic film layer 3000, with a high purity of 99.99% on one side of the film or part of the film under high vacuum. The film was deposited to prepare a film on which the metal deposition layer 103 was formed, which was laminated with the film on which the first colored adhesive layer 102 was laminated.

Then, after laminating the first colored adhesive layer 102 and the second colored adhesive layer 112 in the same manner as the lamination of the first colored adhesive layer 102, a biaxially stretched polyethylene terephthalate film having a thickness of 23 μm ( A solar control film of the present invention was manufactured by laminating a release film prepared by laminating a release layer 104 (ShinEtsu silicon release agent) on a second plastic film layer 2000 of Kolon, Astroll.

Comparative Examples 1 to 4

Comparative Example 1 did not introduce a metal deposition layer using aluminum deposition, Comparative Examples 2 and 3 to use only one layer of the colored adhesive layer, so that the aluminum deposition is laminated on the opposite side of the film layer on which the protective layer for scratch prevention is laminated. In Comparative Example 4, only one layer of the colored adhesive layer was prepared, and no aluminum deposition and the required plastic film layer were prepared.

rescue Example Comparative example One 2 One 2 3 4 Anti-scratch protective layer ⁽¹⁾ ○ ○ ○ ○ ○ ○ First plastic film layer ○ ○ ○ ○ ○ ○ First Colored Adhesive Layer (Red) ⁽²⁾ ○ ○ ○ X X X Metal deposition layer all part X all part X Third plastic film layer ○ ○ ○ X X X Second Colored Adhesive Layer (Black) ⁽²⁾ ○ ○ ○ ○ ○ ○ Release layer ○ ○ ○ ○ ○ ○ Second plastic film layer ○ ○ ○ ○ ○ ○ (1) The protective layer for scratch prevention is urethane acrylate with a photocurable oligomer, dipentaerythritol hexaacrylate with a photocurable monomer, and 1-hydroxycyclohexylphenyl ketone as a photoinitiator, methyl ethyl ketone and ethyl (2) The colored adhesive layer is methyl methacrylate resin with acrylic resin, polyisocyanate resin with curing agent, 2-hydroxy-4-methoxybenzophenone with ultraviolet absorber, first dye and second dye. Is diluted in methyl ethyl ketone and ethyl acetate as a dilution solvent, wherein the first dye represents the dye in the first colored adhesive layer 102 and the second dye represents the dye in the second colored adhesive layer 112. First dye: Spilon-S Red, manufactured by Hodogaya. Second dye: Spilon-S Black, manufactured by Hodogaya.

The visible light transmittance, UV blocking rate, adhesive force and pencil hardness of the solar control film obtained according to Examples 1 to 2 and Comparative Examples 1 to 4 were measured by the following method, and the results are shown in Table 2 below.

Assessment Methods

1) visible light transmittance

The release film was peeled off and then attached to a 3 mm thick glass plate, and the visible light transmittance at 380 to 780 nm was measured using an ultraviolet spectrometer (Shimadzu, UV-3101PC).

2) UV blocking rate

The release film was peeled off and then attached to a 3 mm thick glass plate, and the UV blocking rate at 300 to 380 nm was measured with an ultraviolet spectrometer (Shimadzu, UV-3101PC).

3) adhesion

After attaching the 1-inch-wide and 15-cm-long solar control film from which the release film was peeled off to a 1-inch glass plate, using an Instron, peel the solar control film from the glass plate at a constant speed of 300 mm / min. The force required to make was measured.

4) Pencil hardness

Using a pencil hardness meter (made by Sheen), use 4B, 3B, 2B, B, HB, H, 2H, 3H, 4H, 5H, and 6H pencils (made by Steadler) to scratch the surface of the protective layer to prevent scratches. Pencil hardness was evaluated with a pencil standard of maximum hardness.

Evaluation item Example Comparative example One 2 One 2 3 4 Outdoor colors Metallic red Metallic Red / Black Red Black Red Metallic black Metallic black / black black Indoor color black black Black Red black black black Visible light transmittance (%) 5 5/30 30 5 5/30 30 UV protection rate (%) 99 99 99 99 99 99 Adhesion (kg / in) 0.7 0.7 0.7 0.7 0.7 0.7 Pencil hardness 2H 2H 2H 2H 2H 2H Note: Example 2 and Comparative Example 3 shows the color on the deposition surface / non-deposition surface, respectively.

From the results of Table 2, the solar control film according to the present invention can realize two different colors indoors and outdoors as in the results of Examples 1 and 2, and the solar control function by the metal deposition layer Various physical properties can be given as it is.

On the contrary, in the case of the comparative example which does not have such a structure, even if it has a colored adhesive layer having two different colors or a metal deposition layer, only the metallic gloss makes a difference and cannot realize different colors indoors and outdoors. .

As described in detail above, according to the present invention, a solar control film having a plastic film layer in which a metal deposition layer is laminated between two different colored adhesive layers is characterized by the properties of the conventional solar control film. Unlike the solar control film, which was able to express one color and the color plus the metallic gloss for the color without any deterioration, two or more different colors can be realized indoors and outdoors. It is possible to apply, and also excellent solar thermal control effect of the metal deposition layer can be obtained.

Claims (3)

An aspect having a structure in which a scratch protection layer, a first plastic film layer, a first colored adhesive layer, a metal deposition layer, a third plastic film layer, a second colored adhesive layer, a release layer, and a second plastic film layer are sequentially stacked Light control film. The solar control film of claim 1, wherein the first colored adhesive layer and the second colored adhesive layer have different colors. The solar control film of claim 1, wherein the metal deposition layer is formed on a front surface or a portion of the third plastic film layer.