JP3076894U - Functional window glass - Google Patents

Abstract

(57) [Summary] [PROBLEMS] It is possible to selectively shield any electromagnetic waves such as ultraviolet rays, infrared rays, radio waves, etc., and it is easy to attach a functional film to a window glass, and small bubbles are generated in an attached portion. Thus, the field of view does not become unclear, and an air layer is formed over substantially the entire surface of the window glass to provide heat insulation to the window glass. SOLUTION: In a functional window glass in which a functional film 10 having an electromagnetic wave shielding function is adhered to an indoor surface of a window glass 21, one side of a base film 11 in which the functional film 10 is made of a synthetic resin is made of metal. Or coated with one or more physical vapor-deposited films 12 of a metal oxide,
Physical vapor deposition coating 1 of a functional film on the indoor side of window glass 21 via tape-like adhesive layer 15 along the peripheral edge
2 is adhered, and an air layer 25 is formed between the window glass 21 and the functional film 10.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a functional window glass obtained by attaching a functional film having an electromagnetic wave shielding function to an inner surface of a window glass of a building or a vehicle.

[0002]

[Prior art]

 A functional film made of synthetic resin is attached to the inside of the window glass of buildings and vehicles for the purpose of shielding ultraviolet rays, infrared rays, radio waves, etc. Since the entire surface of the functional film was bonded to the window glass using an adhesive coated material, it was not possible to obtain heat insulation properties, and advanced technology was required for bonding. There was a problem that air bubbles were formed between the film and the film, and the visual field became unclear.

[0003]

[Problems to be solved by the invention]

 This invention is based on a functional windowpane that is designed to selectively block arbitrary electromagnetic waves such as ultraviolet rays, infrared rays, and radio waves other than visible light by attaching a functional film to the windowpane. The functional film can be stuck easily, and no small bubbles are generated at the stuck part, so that the visual field does not become unclear and an air layer is formed over almost the entire surface of the window glass. This gives the window glass heat insulation.

[0004]

[Means for Solving the Problems]

 The functional window glass according to the present invention is a functional window glass in which a functional film having an electromagnetic wave shielding function is adhered to the indoor side surface of the window glass, wherein the functional film is made of a synthetic resin. One side of the film is coated with one or more physical vapor-deposited films made of metal or metal oxide, and a functional adhesive film is formed on the indoor side of the window glass through a tape-shaped adhesive layer along the periphery. The physical vapor-deposited film side is adhered, and an air layer is formed between the window glass and the functional film.

[0005] The above-mentioned functional window glass is obtained by cutting a functional film according to the shape of the target window glass, and bonding the peripheral edge thereof with an arbitrary adhesive such as a double-sided adhesive tape or a water-soluble adhesive. Is obtained by The double-sided adhesive tape is cut along the perimeter of the window glass, and the release paper on one side is peeled off, and the tape is applied along the inside of the window glass or around the physical vapor deposition film of the functional film. Thereafter, the release paper on the opposite side is peeled off, a physical vapor-deposited film of a functional film is stacked on the indoor side of the window glass, and the functional film is adhered to the window glass by holding down the periphery by hand. When a water-soluble adhesive is used, the adhesive can be applied by applying a tape along the periphery of the window glass, and then stacking a functional film and holding the periphery by hand.

[0006] In this case, the window glass and the functional film are bonded only at the peripheral portions of the two, and the central portion other than the peripheral portion is not bonded. An air layer is formed between the window glass and the light-shielding film at the center except for the tape-shaped adhesive portion, which functions as a heat insulating layer and can prevent dew condensation in winter. Since the window glass side of the functional film is covered with one or more physical vapor-deposited films made of metal or metal oxide, various materials such as radio waves, infrared rays, ultraviolet rays, etc. Electromagnetic waves can be shielded. Preferred metals include silver and stainless steel, and preferred metal oxides include titanium oxide and zinc oxide.

The above-mentioned functional film preferably uses a film made of a polyester such as polyethylene terephthalate as a base film, and forms a physical vapor-deposited film by sputtering, ion plating or an ion beam method. The film has good dimensional stability, is easy to vapor-deposit, and improves the peel strength of a physical vapor-deposited film. The thickness of the above-mentioned physical vapor-deposited film is preferably from 2 to 200 nm, and if it is less than 2 nm, a desired effect cannot be obtained.

The above-mentioned adhesive layer between the window glass and the functional film can be formed by sticking a double-sided pressure-sensitive adhesive tape or applying an arbitrary adhesive. The double-sided pressure-sensitive adhesive tape is preferably a colorless and transparent silicone rubber. In this case, the adhesive portion is transparent and inconspicuous, has excellent weather resistance, and does not become brittle by sunlight. As the adhesive for application, a water-soluble paste such as PVC, CMC, sodium alginate, starch and the like is preferable.

[0009]

[Embodiment of the invention]

 Embodiment 1 In FIG. 1, reference numeral 10 denotes a functional film in which a 2 to 30 nm thick physical vapor deposition film 12 made of stainless steel is formed on one surface of a base film 11 made of polyester and having a thickness of 12 to 100 μm by sputtering. Yes, it transmits visible light but has a function to block ultraviolet and infrared light. Reference numeral 15 denotes a double-sided pressure-sensitive adhesive tape having a width of 5 to 12 mm and made of a silicone rubber-based pressure-sensitive adhesive, which is drawn out of a winding roll with one surface covered with release paper 16, and the drawn-out state is shown. Then, the double-sided adhesive tape 15 with the release paper 16 is cut into a desired length, and is adhered along the peripheral edge of the functional film 10 on the side of the physical vapor-deposited film 12.

The physical vapor-deposited film 12 made of stainless steel is set by spreading the base film 11 in a closed chamber, facing the surface thereof with an anode and a target. And formed by applying a high voltage between the anode and the target under a substantial vacuum to perform sputtering.

In FIG. 2, reference numeral 20 denotes a frame of a glass shoji, and the periphery of a plate-like window glass 21 is fitted through a putty 22 into a groove formed along the inner periphery thereof. Then, the functional film 10 is overlaid on the indoor side surface (the lower surface in the figure) of the window glass 21 so that the physical vapor-deposited film 12 faces the window glass 21, and the release film 16 on the physical vapor-deposited film 12 is attached. By pressing the exposed part of the double-sided adhesive tape 15 from above the base film 11 while peeling the release paper 16 from the double-sided adhesive tape 15, the double-sided adhesive tape 15 becomes an adhesive layer and the functional film 10 is formed. A functional window glass fixed to the window glass 21 and covered with the functional film 10 is obtained.

The obtained functional window glass has a function of blocking ultraviolet rays and infrared rays because the indoor side of the window glass 21 is covered with the functional film 10 having the physical vapor deposition film 12 made of stainless steel. I have. Further, since the air layer 25 is formed between the functional film 10 and the window glass 21, it also has heat insulation. Moreover, the work of attaching the functional film 10 is easy, no air bubbles are formed in the attachment portion, and the double-sided adhesive tape 15 of the adhesive layer is a colorless and transparent silicone rubber-based adhesive. The layer 15 is not conspicuous and the transparency of the entire surface of the window glass is not impaired.

Embodiment 2 A functional window glass was prototyped in the same manner as in Embodiment 1 except that the physical vapor deposition film 12 was formed of titanium oxide to a thickness of 50 to 200 nm. In this case, since the physical vapor-deposited film 12 is formed of titanium oxide, it is particularly excellent in the function of shielding infrared rays, and has the same performance as that of the first embodiment in other aspects.

Embodiment 3 In the above-described embodiment 1, titanium and titanium oxide are sequentially sputtered on the base film 11 to form a physical vapor-deposited film of titanium having a thickness of 2 to 30 nm and a thickness of titanium oxide of 30 to 200 nm. A physical vapor-deposited film 12 having a total two-layer structure of the above-described physical vapor-deposited films was formed. In this case, since the physical vapor-deposited film 12 is formed of the two layers described above, it is particularly excellent in the function of blocking ultraviolet rays and infrared rays, and has the same performance as the first embodiment in other aspects.

Embodiment 4 In the above-described embodiment 1, titanium oxide, silver and titanium oxide are sequentially sputtered on the base film 11 to form a physical vapor-deposited film of titanium oxide having a thickness of 50 to 100 nm and a thickness of silver of 5 to 100 nm. A physical vapor-deposited film 12 having a total three-layer structure of a physical vapor-deposited film having a thickness of 30 to 30 nm and a physical vapor-deposited film made of titanium oxide and having a thickness of 50 to 100 nm was formed. did. In this case, since the physical vapor-deposited film 12 is formed of the above three layers, the physical vapor deposition film 12 is particularly excellent in the function of shielding radio waves, ultraviolet rays and infrared rays, and has the same performance as the first embodiment in other aspects.

Fifth Embodiment In the first embodiment, zinc oxide, silver and zinc oxide are sequentially sputtered on the base film 11 to form a physical vapor-deposited film of zinc oxide having a thickness of 10 to 50 nm and a thickness of silver having a thickness of 5 to 50 nm. A functional window glass was trial-produced in the same manner as in Embodiment 1 except that a physical vapor-deposited film 12 having a total three-layer structure of a physical vapor-deposited film of 30 nm and a physical vapor-deposited film of 30 to 100 nm thick made of zinc oxide was formed. In this case, since the physical vapor-deposited film 12 is formed of the above three layers, the physical vapor-deposited film 12 is particularly excellent in a radio wave shielding function, and has the same performance as the first embodiment in other aspects.

In the first to fifth embodiments, the adhesive layer is formed with the double-sided pressure-sensitive adhesive tape 15. An adhesive layer may be formed by applying the same width.

[0018]

[Effect of the invention]

 As described above, according to the present invention, the function of shielding electromagnetic waves such as radio waves, infrared rays, and ultraviolet rays can be imparted to the window glass by attaching the functional film to the window glass. Adhesion is easy, no air bubbles are generated in the adhered portion, and heat insulation can be given to the window glass. In particular, the invention according to claim 2 uses a polyester film for the base film and forms the physical vapor-deposited film by sputtering, ion plating or an ion beam method. The peel strength is improved.

In the invention according to claim 3, since the adhesive layer is formed by a double-sided pressure-sensitive adhesive tape made of a colorless and transparent silicone rubber-based pressure-sensitive adhesive, the adhesive portion becomes inconspicuous and weather resistance is reduced. Is improved. In the invention according to claim 4, since the adhesive layer is formed of a water-soluble adhesive, when the functional film is peeled from the window glass, the water-soluble adhesive remaining on the window glass is easily wiped off. Can be easily replaced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a functional film for covering a window glass.

FIG. 2 is a sectional view of a window glass with a functional film.

[Explanation of symbols]

 10: Functional film 11: Base film 12: Physical vapor deposition film 15: Double-sided adhesive tape (adhesive layer) 16: Release paper 20: Glass screen frame 21: Window glass 22: Putty 25: Air layer

Claims (4)

[Utility model registration claims] 1. A functional window glass in which a functional film having an electromagnetic wave shielding function is adhered to the indoor side surface of the window glass, wherein the functional film is made of a metal or metal by using one side of a base film made of a synthetic resin. It is coated with one or more physical vapor-deposited films made of an oxide, and the physical vapor-deposited film side of the functional film is adhered to the indoor side of the window glass via a tape-like adhesive layer along the periphery thereof, and the window is A functional window glass characterized in that an air layer is formed between the glass and the functional film. 2. The base film is made of polyester,
The functional window glass according to claim 1, wherein the physical vapor-deposited film is formed by sputtering, ion plating, or an ion beam method. 3. The functional window glass according to claim 1, wherein the adhesive layer is formed of a double-sided adhesive tape made of a colorless and transparent silicone rubber-based adhesive. 4. The functional window glass according to claim 1, wherein the adhesive layer is formed by applying a water-soluble glue.