KR20130068503A

KR20130068503A - Infrared rays cut off film

Info

Publication number: KR20130068503A
Application number: KR1020110135727A
Authority: KR
Inventors: 김중배; 배종오; 정훈철; 강보갑; 고은규; 남성희
Original assignee: (주)맥스필름
Priority date: 2011-12-15
Filing date: 2011-12-15
Publication date: 2013-06-26

Abstract

PURPOSE: An infrared ray blocking film is provided to secure a clear view by having higher transmittance than a visible ray and to selectively block an infrared ray part, thereby improving infrared ray blocking performance. CONSTITUTION: An infrared ray blocking film(100) includes a base film(110) and an infrared ray blocking layer(120) for blocking an infrared ray. The infrared ray blocking film includes silver, palladium and copper. The thickness of the infrared ray blocking layer is 20 to 80 nm. The base film includes polyethylene terephthalate. In the infrared ray blocking layer, the total transmittance of a visible ray of which a wavelength is 380 to 780 nm is higher than 55%.

Description

Heat Ray Cut Film {Infrared rays cut off film}

The present invention relates to a heat ray shielding film, and more particularly, to selectively block only an infrared portion, and has a high visible ray transmittance.

In general, ultraviolet rays having a wavelength range of about 10 to 400 nm from the spectrum of sunlight causes skin aging, eye fatigue, cataracts, and discoloration of articles, and infrared rays having a wavelength range of 780 nm or more. It generates strong heat and causes temperature rise.

In particular, in the case of vehicles or buildings that occupy a large portion of the glass damage to the human body and indoor items by ultraviolet rays, especially in summer, the cooling cost is increased due to the temperature rise by infrared rays.

Conventionally, there have been cases where a coating film or metal coating is applied to block such ultraviolet rays or infrared rays, but such a coating film or metal coating blocks not only ultraviolet rays and infrared rays but also visible light, so that a forward observation or a clock is not secured while driving. This can be a deterrent to problems, and the lighting in buildings is bad.

On the other hand, various methods for providing a heat ray blocking film have been developed. 1 is a block diagram of a heat ray blocking film manufactured by the prior art. Looking at the heat ray blocking film to which the prior art is applied, a UV absorber and a heat ray absorber are blended on the surface of the polymer base 20 and wet-coated the blocker (10) having scratch resistance, and the coating is applied to the blocker (10) The polymer base 20 on the opposite side has a heat-resistant film 50 by having an adhesive layer 30 for easy adhesion with the glass window 40 while having an ultraviolet protection function.

Due to the wet manufacturing method, the thickness of the film becomes thicker, which makes the texture hard and the handling difficult to attach to the window, and the color changes easily when exposed to sunlight for a long time while attached to the window. It may damage the appearance of the glass window.

In addition, various and luxurious colors are difficult to express and due to the limitations of the color representation is made of a black and blue-based color of the various problems such as failing to meet the needs of various consumers.

In order to solve this problem, Korean Laid-Open Patent Publication No. 10-2011-0025405 manufactures a heat ray barrier film through dry deposition to provide a thin film while increasing the blocking rate of ultraviolet rays and to prevent discoloration and oxidation to prolong the life. While aesthetics are excellent, but the infrared transmission is low, but the transmission of visible light is also low, there is a problem that can not secure a clearer view.

The present invention is a heat ray shielding film proposed to solve the above problems, the object of the present invention is to provide a heat ray shielding film that can ensure a clearer view, and can selectively block only the infrared portion because the visible light transmittance is high. .

According to an aspect of the present invention, a heat ray blocking film may include a base film and an infrared ray blocking layer that blocks infrared rays.

In this case, the heat ray blocking film may be composed of silver (Ag), palladium (Pd) and copper (Cu).

Meanwhile, the infrared blocking layer may have a thickness of 20 nm to 80 nm.

On the other hand, the base film may include polyethylene terephthalate.

Meanwhile, the infrared blocking layer may have a total transmittance of 55% or more of visible light having a wavelength of 380 to 780 nm, and a total infrared transmittance of 50% or less with a wavelength of 780 to 2,100 nm.

The heat ray blocking film according to an embodiment of the present invention can secure a clearer field of view with a high transmittance of visible light, and can improve infrared ray blocking performance by selectively blocking only the infrared portion.

1 is a block diagram of a heat ray blocking film manufactured by the prior art.
2 is a block diagram of a heat ray blocking film according to an embodiment of the present invention.
3 is a view showing transmittance for each wavelength band when the PET film is used as the base film and the infrared blocking layer is 20 nm.
4 is a view showing transmittance for each wavelength band when the PET film is used as the base film and the infrared blocking layer is 25 nm.
FIG. 5 is a view showing transmittance for each wavelength band when the PET film is used as the base film and the infrared blocking layer is 30 nm.
FIG. 6 is a view showing transmittance for each wavelength band when the PET film is used as the base film and the infrared blocking layer is 35 nm.
FIG. 7 is a view showing transmittance for each wavelength band when the PET film is used as the base film and the infrared blocking layer is 45 nm.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, configurations and operations of embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a heat ray blocking film according to an embodiment of the present invention. Heat shielding film according to an embodiment of the present invention to reduce the heat radiation from the glass window in the high temperature work area, block the solar energy incident from the window of the building, car or train to improve the cooling, heating effect, transparent It can be used to improve the heat shielding properties of plant containers or to improve the cooling effect of frozen and refrigerated shelves.

2, the heat ray blocking film 100 according to an embodiment of the present invention forms an infrared ray blocking layer 120 for blocking infrared rays on one surface of the base film 110 used as a base.

The base film 110 forming the infrared blocking layer 120 is transparent, flexible, and has a heat-resistant thermoplastic resin that maintains an operating temperature when a metal-laminated film is formed on the surface thereof by sputtering or vacuum deposition. Is preferably.

Polymers capable of forming thermoplastic films may include polyesters (eg, polyethylene terephthalate (PET) and polyethylene-2,6-naphthalate), aliphatic polyamides, aromatic polyamides, polyethylene, polypropylene, and the like. have.

Among these, polyester is preferable. Among the thermoplastic resin films, biaxially oriented polyethylene terephthalate (PET) films having excellent heat resistance and mechanical strength may be most preferred.

The infrared blocking layer 120 is formed on one surface of the base film 110, and the infrared blocking layer 120 is composed of silver (Ag), palladium (Pd), and copper (Cu) to improve the blocking efficiency of infrared rays. Can be. Here, copper (Cu) may perform the antioxidant function of silver (Ag). Silver (Ag) may function to block infrared rays incident to the heat ray blocking film 100 according to an embodiment of the present invention.

The thickness of the infrared blocking layer 120 is preferably 20 nm to 80 nm. When the thickness is less than 20 nm, sufficient heat ray blocking effect cannot be obtained and the transmittance of infrared rays can be high. When the thickness is larger than 80 nm, the transmittance of visible light may be lowered and the transparency may be poor.

The infrared blocking layer 120 may preferably be formed by vapor phase growth, particularly preferably by vacuum deposition, sputtering or plasma CVD. The thickness of the infrared ray blocking layer 120 is preferably adjusted so that the total visible light transmittance having a wavelength of 380 to 780 nm is 55% or more, and the near infrared total transmittance having a wavelength of 780 to 2,100 nm is 50% or less.

When the total visible ray transmittance is less than 55%, the transparency of the heat ray blocking film according to an embodiment of the present invention may be reduced, and when the total ray transmittance of the near infrared ray is greater than 50%, the heat ray blocking according to an embodiment of the present invention. The heat ray blocking effect of the film may be lowered.

The heat ray blocking film according to an embodiment of the present invention should have a haze value of 5% or less. If the haze value is 5% or more, transparency may be poor.

Next, the process of manufacturing the heat ray blocking film 100 is demonstrated.

First, a material for forming an infrared ray blocking layer 120 on one surface of the base film 110 and the base film 110 to be used as a base in the vacuum sputtering chamber is prepared.

Next, pumping is performed to maintain a vacuum in the vacuum sputtering chamber in which the base film 110 and the infrared ray blocking layer 120 are prepared.

Thereafter, the pumped vacuum sputtering chamber is operated to perform deposition to form the infrared ray blocking layer 120.

The infrared ray blocking layer 120 may be formed of a single layer composed of silver (Ag), palladium (Pd), and copper (Cu) in order to increase the transmittance of visible light and reduce the transmittance of infrared rays while providing ease of deposition.

More specifically, the material for forming the infrared blocking layer 120 may include silver (Ag) having excellent blocking property in the infrared region and copper (Cu) to prevent silver from oxidizing when exposed to sunlight and air. have.

When the base film 110 moves from one side of the vacuum sputtering chamber to the other side, silver (Ag) and palladium (Pd) for forming the infrared blocking layer 120 so that the vacuum sputtering chamber forms the infrared blocking layer 120. ) And copper (Cu).

Formation conditions of the infrared blocking layer 120 is to perform a single deposition by using a roll of argon (Ar) gas at a speed of 4 ~ 6m / min and the thickness of the infrared blocking layer 120 has a thickness of 20nm to 80nm It can be configured.

Finally, an adhesive layer may be formed on the other side of the base film 110 on which the infrared blocking layer 120 is deposited.

[Example 1]

3 is a view showing transmittance for each wavelength band when the PET film is used as the base film and the infrared blocking layer is 20 nm.

As shown in Figure 3, when the wavelength is 804nm, it can be seen that the transmittance is formed less than 50%.

The performance of the film can be evaluated by the transmittance and the haze (diffusion) value. Increasing the transmittance has a property of inferior diffusivity, while increasing the diffusivity has a property inferior in transmittance. In the case of the heat ray blocking film according to Example 1, the haze is 0.58.

[Example 2]

4 is a view showing transmittance for each wavelength band when the PET film is used as the base film and the infrared blocking layer is 25 nm.

As shown in Figure 4, when the wavelength is 804nm, it can be seen that the transmittance is formed less than 50%. In the case of the heat ray blocking film according to Example 2, the haze is 0.41.

[Example 3]

FIG. 5 is a view showing transmittance for each wavelength band when the PET film is used as the base film and the infrared blocking layer is 30 nm.

As shown in Figure 5, when the wavelength is 804nm, it can be seen that the transmittance is formed to 50% or less. In the case of the heat ray blocking film according to Example 3, the haze is 0.42.

Example 4

FIG. 6 is a view showing transmittance for each wavelength band when the PET film is used as the base film and the infrared blocking layer is 35 nm.

As shown in Figure 6, when the wavelength is 804nm, it can be seen that the transmittance is formed less than 50%. In the case of the heat ray blocking film according to Example 4, the haze is 0.41.

[Example 5]

FIG. 7 is a view showing transmittance for each wavelength band when the PET film is used as the base film and the infrared blocking layer is 45 nm.

As shown in Figure 7, when the wavelength is 804nm, it can be seen that the transmittance is formed to 50% or less. In the case of the heat ray blocking film according to Example 5, the haze is 0.46.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood. The embodiments described above are therefore to be considered in all respects as illustrative and not restrictive.

100: heat ray blocking film 110: base film
120: infrared blocking layer

Claims

Base film and
Including an infrared blocking layer for blocking infrared rays
Heat shield film.

The method of claim 1,
The heat ray blocking film,
Heat shielding film comprising silver (Ag), palladium (Pd) and copper (Cu).

The method of claim 1,
The thickness of the infrared blocking layer,
20 nm to 80 nm of a heat ray blocking film.

The method of claim 1,
The base film,
Heat shield film comprising polyethylene terephthalate.

The method of claim 1,
The infrared blocking layer,
A visible ray total transmittance of 380 to 780 nm is 55% or more, and a near infrared ray total transmittance of 780 to 2,100 nm is 50% or less.