JPH11302038A - Heat ray reflective light-transmissible plate and heat ray reflective double layer light-transmissible plate using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the adhesion of stains to a heat ray reflection film surface and to allow the easy dislodgment of the adhered stains by consisting at the film on the outermost layer of the heat ray reflection film formed by laminating plural films formed on a light-transmissible substrate of an amorphous film. SOLUTION: Heat ray reflection glass 20 is constituted by successively laminating an SnO2 film 23 which has a relatively high refractive index and is a columnar polycrystal and an SiO2 film 24 which has a relatively low refractive index and is amorphous on a transparent glass substrate 22 having a relatively low refractive index. The heat ray reflection film 21 is composed of the SnO2 film 23 and the SiO2 film 24. Since the SiO2 film 24 is amorphous, the film easily infiltrates the inside of the recessed parts existing in the outer surface 23a of the SnO2 film 23 and airtightly adheres to the outer surface 23a over the entire part thereof. In addition, the outer surface 24a of the SiO2 film 24 is relatively flat and has nearly the smooth ruggedness even if the minor ruggedness exists. The surface roughness having, for example, 200 nm is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-ray-reflecting light-transmitting plate for buildings and transportation equipment having excellent heat insulating properties by efficiently reflecting mainly infrared rays from sunlight. Also, the present invention relates to a heat-reflective multilayer translucent plate using such a heat-reflective translucent plate.

[0002]

2. Description of the Related Art As a heat ray reflective glass having excellent heat insulating properties by efficiently reflecting infrared rays mainly from sunlight, for example, the one shown in FIG. 6 is conventionally known. The heat ray reflective glass 10 shown in FIG. 6 includes a first metal oxide film 13,
It is obtained by laminating an SiO ₂ film 14 and a second metal oxide film 15. The first and second metal oxide films 13 and 15 and the SiO ₂ film 14 constitute the heat ray reflective film 11. The first and second metal oxide films 13 and 15 are made of ITO and S, respectively.
Sputtering, spraying, CV of nO ₂ or ZnO
D or formed by vapor deposition.

[0003] In the heat ray reflective glass 10 shown in FIG.
The second metal oxide film 15 having a relatively large film thickness has an excellent heat ray reflection function, and is configured to function as a heat ray reflection film main body. The first metal oxide film 13 having a relatively small film thickness is a complementary color that mainly reflects light that is substantially complementary to light reflected by the second metal oxide film 15 in sunlight. It has a light reflection function. The SiO ₂ film 14
Has a smaller refractive index than the first and second metal oxide films 13 and 15, and has a predetermined refractive index difference at the interface with the first and second metal oxide films 13 and 14. It is to have. Then, the sunlight is irradiated on the high refractive index side (that is, the first or second metal oxide film 1).
3 or 15 side) to the lower refractive index side (ie, SiO ₂
When trying to pass through the interface toward the film 14)
A certain degree of reflection depending on the wavelength is performed.

[0004]

In the heat ray reflective glass 10 shown in FIG. 6, since the first and second metal oxide films 13 and 15 are columnar polycrystals, the uppermost layer (that is, the uppermost layer) , The outermost layer) of the second metal oxide film 1
The outer surface 15a of 5 has remarkable irregularities and is very hard, so that it is like a file surface. Therefore, when foreign matter comes into contact with the outer surface 15a of the second metal oxide film 15 of the heat ray reflective glass 10 shown in FIG.
Since these particles are buried in the recesses existing in the area a, these fine powders become dirt and adhere to the outer surface 15a, and the dirt is difficult to remove. Therefore, when the heat ray reflective glass 10 shown in FIG. 6 is used as a component of a heat ray reflective double glass for buildings (particularly, for houses),
The heat ray reflective film 11 is arranged inside the multilayer glass such that the heat ray reflective film 11 faces a dry air layer formed between the two glasses constituting the multilayer glass. . Therefore, when manufacturing the heat ray reflective multilayer glass using the heat ray reflection glass 10 shown in FIG. 6 as a constituent member, the film surface of the heat ray reflection glass 10 (that is, the surface on which the heat ray reflection film 11 is formed). ), It was necessary to attach a seal to an appropriate portion of the heat ray reflective glass 10 so as to indicate on which side the film surface is.

In order to ensure a predetermined heat ray reflection performance, the first and second metal oxide films 13 and 15 and the SiO ₂ film 14 constituting the heat ray reflection film 11 are determined in advance. Therefore, the color tone of the heat ray reflective glass 10 cannot be freely changed because the color tone is uniquely determined.

One object of the present invention is to prevent dirt from adhering to the surface of a heat ray reflective film even though it has substantially the same heat ray reflection performance as conventional heat ray reflective glass. An object of the present invention is to provide a heat-reflective light-transmitting plate that easily removes such dirt.

Another object of the present invention is to provide a heat-ray reflective glass which has a heat-ray reflective performance substantially similar to that of a conventional heat-ray reflective glass, but whose color tone can be adjusted relatively freely at the time of manufacture. It is to provide a light transmitting plate.

[0008] Still another object of the present invention is to provide a heat-reflective multilayer translucent plate using the heat-reflective translucent plate as a constituent member thereof. It is an object of the present invention to provide a heat-reflective light-transmitting plate which does not particularly need to distinguish one surface from another surface in advance.

[0009]

According to the present invention, a heat ray reflective film formed by laminating a plurality of films on a light-transmitting substrate is formed, and the outermost film among the heat ray reflective films is formed. The present invention relates to a heat-reflective translucent plate made of an amorphous substance.

[0010] The translucent substrate may be a transparent or translucent glass plate at least in a visible light region or a transparent or translucent synthetic resin plate at least in a visible light region.
As a material for the glass plate, float glass, soda lime glass, borosilicate glass, crystallized glass, or the like can be used. Further, as the material of the synthetic resin plate, PET (polyethylene terephthalate), PVB (polyvinyl butyral), EVA (ethyl vinyl acetate), a cellulose resin, or the like can be used. The thickness of the light-transmitting substrate may be generally 0.5 to 10 mm, and preferably 1 to 5 mm.

The above-mentioned amorphous substance is preferably an oxide, among which silicon oxide such as SiO ₂ ,
Aluminum oxide such as Al ₂ O ₃ and SnSiOx
More preferably, it is at least one member selected from the group consisting of tin / silicon composite oxides, and among them, SiO ₂ is particularly preferred.

The film immediately inside the outermost layer is made of a crystalline (particularly columnar polycrystalline) substance (particularly a metal oxide) having a higher refractive index than the outermost layer. Of which, among them, tin oxide such as SnO ₂ (including doped products such as fluorine, chlorine and antimony), In
Indium oxide including ₂ O _3, ITO (SnO ₂ containing an In ₂ O _3), zinc oxide, such as ZnO (fluorine, indium, tin, including doped aluminum product) and from cadmium oxide, such as Cd ₂ O ₅ More preferably, it is composed of at least one selected from the group consisting of, and among them, SnO ₂ is particularly preferred.

According to one aspect of the present invention, an inner film composed of a material having a relatively high refractive index and functioning as a heat ray reflective film main body and an amorphous material having a relatively low refractive index are formed on a light-transmitting substrate. The configured outermost film may be sequentially laminated. According to another aspect of the present invention, a film of an innermost layer made of a material having a relatively low refractive index and a heat ray reflective film main body made of a material having a relatively high refractive index are formed on a light-transmitting substrate. And an outermost layer made of an amorphous substance having a relatively low refractive index may be sequentially laminated. According to still another aspect of the present invention, an innermost layer film made of a material having a relatively high refractive index and a first film made of a material having a relatively low refractive index are formed on a light-transmitting substrate. , A second intermediate film made of a material having a relatively high refractive index, and an outermost film made of an amorphous material having a relatively low refractive index are sequentially laminated, and the film of the innermost layer is formed. Further, one of the second intermediate films may be configured to function as a heat ray reflective film main body.

The substance having a relatively low refractive index is preferably an amorphous substance (particularly, an oxide), among which silicon oxide such as SiO ₂ , aluminum oxide such as Al ₂ O ₃ and tin such as SnSiOx. more preferably at least one kind of silicon selected from the group consisting of composite oxides, and particularly preferably from SiO ₂ among them. The substance having a relatively high refractive index is preferably composed of a crystalline (particularly, columnar polycrystalline) substance (particularly, a metal oxide), and among them, tin oxide such as SnO ₂ (fluorine, Doped products such as chlorine and antimony), indium oxide such as In ₂ O ₃ , zinc oxide such as ITO and ZnO (including doped products such as fluorine, indium, tin and aluminum) and oxidation such as Cd ₂ O ₅ More preferably, it is at least one selected from the group consisting of cadmium, and among them, SnO ₂ is particularly preferable.

[0015] The surface roughness of the outer surface of the film immediately inside the outermost film may be about 10 to 1,000 nm,
More preferably, it is about 10 to 500 nm. The numerical value relating to the surface roughness also applies to other films made of the above-mentioned substance having a relatively high refractive index. The outermost layer has a surface roughness of about 10 to 500 nm.
And more preferably about 10 to 100 nm. And the numerical value related to this surface roughness is
This also applies to other films made of a material having a relatively low refractive index. Further, the surface roughness of the film immediately inside the outermost layer film (and / or the other film made of a material having a relatively high refractive index) is compared with the surface roughness of the outermost layer film (and / or the refractive index). The difference in surface roughness from another film composed of a very low substance is preferably from 5 to 500 nm, more preferably from 5 to 100 nm.

The thickness of the outermost layer is 5 to 200 nm.
Is preferably, and more preferably, 10 to 100 nm. The thickness of the film configured to function as the heat ray reflective film main body is preferably from 200 to 1,000 nm, and more preferably from 250 to 600 nm.

The refractive index of the film of the outermost layer with respect to light having a wavelength of 550 nm is preferably 1.45 to 1.8.
The numerical value related to the refractive index also applies to other films made of the substance having a relatively low refractive index.
In addition, the wavelength of the film just inside the outermost film is 550 nm.
Has a refractive index of preferably 1.8 to 2.5. The numerical value related to the refractive index also applies to other films composed of the above-mentioned substance having a relatively high refractive index. Further, the refractive index of the film immediately inside the film of the outermost layer (and / or the other film composed of a material having a relatively high refractive index) with respect to the light having a wavelength of 550 nm, and the film of the outermost layer (and / or Alternatively, the difference from the refractive index of the other film composed of a substance having a relatively low refractive index) with respect to light having a wavelength of 550 nm is preferably 0.1 to 0.8.

Further, the present invention comprises a heat ray-reflecting light-transmitting plate as described above, and at least one second light-transmitting plate disposed so as to face the heat ray-reflecting light-transmitting plate. The heat ray reflective film provided on the heat ray reflective light transmissive plate is the at least one second surface of both surfaces of the heat ray reflective light transmissive plate.
So that it is arranged on the side opposite to the side facing the translucent plate of
The present invention also relates to a heat-reflective multilayer light-transmitting plate in which the heat-reflective light-transmitting plate and the at least one second light-transmitting plate are connected to each other. In addition, as said 2nd translucent plate,
The above-mentioned materials, thicknesses, and the like that can be used as the light-transmitting substrate in the heat-ray reflective light-transmitting plate can also be used. Also, this second light-transmitting plate
A heat ray reflective film similar to the light transmissive substrate of the heat ray reflective light transmissive plate may be formed.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows first, second and third embodiments in which the present invention is applied to a heat ray reflective glass, and one embodiment in which the present invention is applied to a heat ray reflective double glass. ~ FIG.
And will be described with reference to FIGS.

Heat Reflection Glass First, second, and third embodiments in which the present invention is applied to a heat reflection glass will be described in order with reference to FIGS.

[0021] The first embodiment heat reflecting glass 20 in the first embodiment, FIG. 1
Was manufactured as follows so as to have the structure shown in FIG.

First, a plate glass having a thickness of 2 mm was formed by a float method in which soda-lime-silica glass melted in a melting furnace was poured into a tin tank. The atmosphere in the tin bath consisted of 98% by volume of nitrogen and 2% by volume of hydrogen. The pressure in this atmosphere was slightly higher than the pressure outside the tin tank. In addition, the above-mentioned plate glass is cut into a predetermined size to form the transparent glass substrate 22. Further, in the tin bath, a plurality of groups of nozzles capable of supplying a raw material gas are provided along the flow direction of the sheet glass so that the online CDV method can be performed there.

When the sheet glass formed in the tin tank as described above passes below the first group of nozzles, a mixed gas of dimethyltin dichloride vapor, oxygen and nitrogen (hereinafter, referred to as the above-mentioned "No. 1) is the first gas
The sheet glass was fed from a group of nozzles. As a result, a SnO ₂ film 2 having a thickness of 300 nm was formed on the sheet glass.
3 was formed.

Next, when the sheet glass passes below the nozzles of the second group, a mixed gas of monosilane, ethylene, oxygen and nitrogen (hereinafter referred to as the "second mixed gas") is applied to the second group of nozzles. The sheet glass was fed from a group of nozzles. As a result, an SiO ₂ film 24 having a thickness of 20 mm was formed on the SnO ₂ film 23 of the sheet glass.

In this case, the sheet glass is composed of the first group and the second group.
Since the time to pass under the group of nozzles is approximately equal, S
The thickness of each of the nO ₂ film 23 and the SiO ₂ film 24 can be freely controlled by changing the concentrations of the source gases supplied from the nozzles of the first and second groups.

Then, the sheet glass was cooled and then cut into a predetermined size, whereby the heat ray reflective glass 20 shown in FIG. 1 was obtained.

The heat ray reflective glass 20 shown in FIG. 1 is formed on a transparent glass substrate 22 having a relatively low refractive index by sequentially forming a columnar polycrystalline SnO ₂ film (ie, a metal oxide film) having a relatively high refractive index. ) 23 and an SiO ₂ film 24 having a relatively low refractive index and being amorphous. The heat ray reflection film 21 is constituted by the SnO ₂ film 23 and the SiO ₂ film 24. In addition, SnO
_{Since the second} film 23 is a columnar polycrystal, the SnO ₂ film 2
The third outer surface 23a has remarkable unevenness, and its surface roughness is, for example, 350 nm. However, the SiO ₂ film 2
4, because it is amorphous, and readily penetrate into the recesses present on the outer surface 23a of the SnO ₂ film 23, together with close contact in an airtight throughout the outer surface 23a, an outer surface of the SiO ₂ film 24 Reference numeral 24a denotes a relatively flat and substantially smooth unevenness even if some unevenness is present, and its surface roughness is, for example, 200 nm.

In the heat ray reflective glass 20 shown in FIG.
The SnO ₂ film 23 is made of the conventional heat reflective glass 1 shown in FIG.
As in the case of the second metal oxide film 15 at 0, it has an excellent heat ray reflection function and is configured to function as a heat ray reflection film main body. Also, the SiO ₂ film 2
4 is S in the conventional heat ray reflective glass 10 shown in FIG.
Like the iO ₂ film 14, the interface between the SnO ₂ film 23 and the SnO ₂ film 23 has a predetermined refractive index difference, and the outer surface of the heat ray reflective film 21 is made substantially smooth as described above.

The heat reflecting glass 30 in the second embodiment the second embodiment, FIG. 2
As shown in the figure, the transparent glass substrate 32 having a relatively low refractive index
An SiO ₂ film 34 having a relatively low refractive index and being amorphous, a SnO ₂ film 35 having a relatively high refractive index and being a columnar polycrystal, and an SiO ₂ film having a relatively low refractive index and being amorphous Reference numeral 36 denotes a stack. Then, the SiO ₂ films 34 and 36 and the SnO ₂ film 3
5, the heat ray reflection film 31 is formed. Also, S
Since the nO ₂ film 35 is a columnar polycrystal, the SnO ₂
The outer surface 35a of the film 35 has remarkable unevenness and has a surface roughness of, for example, 350 nm. However, the outer surface 36a of the SiO ₂ film 36 is substantially the same as that in the first embodiment. Is almost smooth, and its surface roughness is, for example, 200 nm.

The heat ray reflective glass 30 shown in FIG. 2 was manufactured in the same manner as the heat ray reflective glass 20 according to the first embodiment, except for the following points.

That is, in the second embodiment,
A first group, a second group, and a third group of nozzles were provided in the tin tank along the flow direction of the sheet glass. The second mixed gas was supplied to the nozzles of the first and third groups as raw glass. Further, the first mixed gas was supplied as a source gas to the nozzles of the second group. In this case, the SiO ₂ film 34, SnO ₂ film 35 and SiO ₂
The thicknesses of the _two films 36 were 30 nm, 350 nm, and 50 nm, respectively.

In the heat ray reflective glass 30 shown in FIG.
The SnO ₂ film 35 is formed of the conventional heat ray reflective glass 1 shown in FIG.
As in the case of the second metal oxide film 15 at 0, it has an excellent heat ray reflection function and is configured to function as a heat ray reflection film main body. In addition, the SiO ₂ film 3
4 is S in the conventional heat ray reflective glass 10 shown in FIG.
Like the iO ₂ film 14, this is for giving a predetermined refractive index difference to the interface with the SnO ₂ film 35. Furthermore, Si
The O ₂ film 36 has a predetermined refractive index difference at the interface with the SnO ₂ film 35 as in the SiO ₂ film 14 of the conventional heat ray reflective glass 10 shown in FIG. This is for making the surface of S.31 substantially smooth.

The third embodiment heat reflecting glass 40 in the third embodiment, FIG. 3
As shown in the figure, a transparent glass substrate 42 having a relatively low refractive index
In the upper order, the SnO ₂ film 43 having a relatively high refractive index and columnar polycrystal, the SiO ₂ film 44 having a relatively low refractive index and amorphous, and the columnar polycrystal having a relatively high refractive index and columnar. It is formed by stacking a SnO ₂ film 45 and an amorphous SiO ₂ film 46 having a relatively low refractive index. Then, the SiO ₂ films 43 and 45 and SnO
_The heat ray reflection film 41 is formed by the _two films 44 and 46. Further, SnO ₂ films 43, 45 because columnar polycrystalline, outer surface 43a, 4 of the SnO ₂ film 43 and 45
5a has remarkable irregularities, and their surface roughness is, for example, 350 nm, respectively. However, for substantially the same reason as in the first embodiment, the outer surfaces 44a of the SiO ₂ films 44, 46 are formed. , 46a are substantially smooth, and their surface roughness is, for example, 100 nm, respectively.

The heat ray reflective glass 40 shown in FIG. 3 was manufactured in the same manner as the heat ray reflective glass 20 according to the first embodiment, except for the following points.

That is, in the third embodiment,
The first group, the second group, the third group, and the fourth group of nozzles were provided in the zero tank along the flow direction of the sheet glass. And the first
The first and second nozzles are used as source gases in the first and third groups.
Were supplied respectively. The second mixed gas was supplied to the nozzles of the second and fourth groups as the source gas. In this case, the SnO ₂ film 43, Si
The thicknesses of the O ₂ film 44, SnO ₂ film 45 and SiO ₂ film 46 were 50 nm, 15 nm, 400 nm and 35 nm, respectively.

In the heat ray reflective glass 40 shown in FIG.
The SnO ₂ film 45 has an excellent heat ray reflection function similarly to the second metal oxide film 15 in the conventional heat ray reflection glass shown in FIG. 6, and is configured to function as a heat ray reflection film main body. Have been. The SnO ₂ film 43
Is the first in the conventional heat ray reflective glass 10 shown in FIG.
Like the metal oxide film 15 described above, it has a complementary color light reflection function. The SiO ₂ film 44 is for providing a predetermined refractive index difference at the interface with the SnO ₂ films 43 and 45, similarly to the SiO ₂ film 14 in the conventional heat ray reflective glass 10 shown in FIG. . Further, the SiO ₂ film 46
Represents Si in the conventional heat ray reflective glass 10 shown in FIG.
Like the O ₂ film 14, the interface between the SnO ₂ film 45 and the SnO ₂ film 45 has a predetermined refractive index difference, and the surface of the heat ray reflective film 41 is made almost smooth as described above.

In the heat ray reflective glass 40 according to the third embodiment, the SnO ₂ film 45 cannot be changed in thickness in order to secure a predetermined heat ray reflection performance. An experiment was conducted in which the color tone was changed by changing the film thickness. In this experiment, the SnO ₂ film 45 contained some fluorine as a dopant in order to improve the heat ray reflection performance. Therefore, in this case, in the above-described manufacturing process, the raw material gas supplied to the third group of nozzles was slightly mixed with fluorine.

As a result of the above test, a ^* and b ^* are in the range of −15 <a ^* <15───── (1) −7 <b ^* <8─────── (2) The heat ray reflective glass 40 varying variously in the above was obtained. Therefore, it has been found that the heat ray reflective glass 40 can be manufactured having various color tones such as green and blue. A ^* and b in the text
^* Is the Japanese Industrial Standard Z 8729 (the method of displaying object colors using the L ^* a ^* b ^* color system and the L ^* u ^* v ^* color system)
In the above, chromaticness indices a ^* and b ^* are defined.

Table 1 below shows specific examples 1 to 4 of the heat ray reflective glass 40 having such various color tones.

[0040]

[Table 1]

In Examples 1 to 4 shown in Table 1, the SnO ₂ film 45 contains some fluorine.
The thicknesses of the films 43 to 46 of the first embodiment are the same as those already described as the respective film thicknesses of the heat ray reflective glass 40 according to the third embodiment.

As is clear from Table 1, Sn having a predetermined thickness is required to secure a predetermined heat ray reflection performance.
Without changing the thickness of the O ₂ film 45 (outer intermediate layer),
₂ film 46 (outermost layer), by changing the film thickness of the SiO ₂ film 44 (inner intermediate layer) and SnO ₂ film 43 (the innermost layer), the color tone of the heat ray reflecting glass 40 is obviously varied.

FIG. 4 shows another result of the above experiment.

That is, in FIG. 4, in the heat ray reflective glass 40 according to the third embodiment, the thickness of the SnO ₂ film 45 containing a small amount of fluorine is kept unchanged without changing the thickness of the other films 43, 44, 46. A ^* and b ^* by changing the film thickness variously
Is measured in this example, and the case of the comparative example in which the SiO ₂ film 46 (outermost layer) is not provided is indicated by □ (however, black solid coating). ).

As apparent from FIG. 4, in the case of the comparative example (marked with □), a ^* changes only in a very narrow range, whereas in the case of the present embodiment, the inequality (1) ) And inequality (2), both a ^* and b ^* vary over a relatively wide range.

Therefore, in the case of the above comparative example, as shown in Table 2 below, only those of magenta, neutral and green can be obtained.

[0047]

[Table 2]

On the other hand, in the case of this embodiment, as shown in Table 3 below, not only those of magenta, neutral and green, but also those of blue, blue-green, yellow-green and A yellow type can also be obtained.

[0049]

[Table 3]

In the case of the heat ray reflective glasses 20, 30 shown in FIGS. 1 and 2 in the first and second embodiments, similarly to the case of this embodiment, the SiO ₂ films 24, 34,
The color tone can be changed relatively freely by changing the thickness of the film 36 variously.

As described above, the heat ray reflective glasses 20, 30, and 40 shown in FIGS. 1, 2 and 3 in the first, second and third embodiments have the SnO functioning as a heat ray reflective film main body. _{Since the two} films 23, 35, and 45 are provided, the heat ray reflective film 2 has substantially the same heat ray reflection performance as the conventional heat ray reflective glass 10 shown in FIG.
1, 31, 41 (that is, the SiO ₂ film 2
4, 36, and 46), and even if they do, they can be easily removed by polishing with a detergent. Further, the heat ray reflective films 21 and 3
SnO ₂ films 24 and 3 which are the outermost films of 1 and 41
By adjusting the film thicknesses of the films 6, 46 and the other films 34, 43, 44 at the time of manufacturing, the color tone can be relatively freely adjusted.

[0052] heat-reflecting double glazing Next, an embodiment of the present invention is applied to a thermally reflective double glazing with reference to FIG.

As shown in FIG. 5, the heat ray-reflective multilayer glass 50 in this embodiment is one of the heat ray reflection glasses 20, 30, and 40 shown in FIG. 1, FIG. 2 and FIG.
And a second transparent glass 52 which may have substantially the same configuration as the transparent glass substrates 22, 32, 42 shown in FIGS. 1, 2 and 3. It comprises a glazing channel 53 made of synthetic resin, metal, rubber or the like having a character-shaped cross section, and a spacer 54 made of aluminum or the like having a block-shaped cross section. The heat ray reflective glass 51, the spacer 54, and the second transparent glass 52 are fitted and fixed in the mounting groove 55 of the glazing channel 53 having a substantially U-shaped cross section while being laminated on each other. For this purpose, the second transparent glass 52 is disposed substantially in parallel with the heat ray reflective glass 51 so as to face the heat ray reflective glass 51 at an appropriate interval (for example, 6 mm). Therefore, the heat ray reflection glass 51
A dry air layer 56 is formed between and the second transparent glass 52.

The dry air layer 56 may be replaced with a vacuum layer or a transparent resin film. In the latter case, the heat ray reflective glass 51 is formed by the transparent resin film.
And the second transparent glass 52 are adhered to each other, so that the heat ray reflective multilayer glass 50 becomes a laminated glass, and thus the glazing channel 53 and the spacer 54 can be omitted. Further, such a transparent resin film is composed of at least one selected from the group consisting of a polyvinyl alcohol resin such as polyvinyl butyral, a vinyl acetate resin such as ethylene vinyl acetate, a thermoplastic polyurethane resin and a polyvinyl chloride resin. be able to.

In the heat ray reflective multilayer glass 50 shown in FIG. 5, the heat ray reflection film 57 of the heat ray reflection glass 51 is formed on the dry air layer 5 of the transparent glass substrate 58 of the heat ray reflection glass 51.
6 faces the opposite side (that is, the outer side).
However, the SiO ₂ film 24, 36, or 46 is formed on the outermost layer of the heat ray reflective film 57, as in the cases shown in FIGS. Therefore, the heat ray reflective film 57
(Ie, the SiO ₂ film 24, 36 or 46)
Dirt hardly adheres to the outer surface of the surface, and even if the dirt adheres, the dirt is relatively easily removed by polishing with a detergent or the like. Further, the surface of the heat ray reflective glass 51 on the side of the dry air layer 56 (that is, the inner side surface) is the rear surface of the transparent glass substrate 58 and is extremely flat. Few things. Further, the heat ray reflective double glass 50 shown in FIG.
Has a substantially high heat insulating effect because of the provision of the second transparent glass 52, the dry air layer 56, and the transparent glass substrate 58, and has a higher heat insulating effect because of the provision of the heat ray reflective film 57. doing.

The heat reflection films 21, 31, 41 of the heat reflection glass 20, 30, 40 used in the present embodiment are:
Since the outermost film is the SiO ₂ film 24, 36, 46, the outer surface is almost smooth and dirt is hardly adhered, and even if it is adhered, the dirt is easily removed. Therefore, such heat ray reflective glasses 20, 30, 40
When the heat ray reflective double glazing 50 is manufactured by using as a constituent member thereof, the heat ray reflection glass 20, 30, 40
Even if the heat ray reflective films 21, 31, 41 are disposed inside or outside the double-glazed glass 50, the function of the heat-ray reflective double glass 50 does not significantly differ. Therefore, even when the heat ray reflective multilayer glass 50 is manufactured using the heat ray reflection glasses 20, 30, and 40 as its constituent members, generally, the heat ray reflection glass 20, 30, 40 is used.
It is not particularly necessary to previously distinguish the film surface from the other surface.

In FIG. 5, the heat ray reflecting glass 51
Even when the sunlight is incident on the heat ray reflective double glass 50 from the heat ray reflective glass 51 side with the side facing the outdoor side, the second transparent glass 52 side is oriented toward the outdoor side and the second
Even when sunlight is incident on the heat ray reflective double glass 50 from the side of the transparent glass 52, the heat ray reflective double glass 50
Does not make much difference in the function of. Therefore, even when the heat ray reflective multilayer glass 50 is mounted on a window frame of a house, it is generally necessary to distinguish the surface of the heat ray reflective multilayer glass 50 on the heat ray reflective glass 51 side from the other surface in advance. Absent.

[0058]

According to the heat ray reflective translucent plate of the present invention, the outermost layer of the heat ray reflection film formed by laminating a plurality of films is made of an amorphous material. Even if the outer surface of the film immediately inside the outermost layer has a significant unevenness, the outer surface of the heat ray reflective film can be made substantially smooth. Therefore, despite having almost the same heat ray reflection performance as conventional heat ray reflection glass, dirt does not easily adhere to the outer surface of the heat ray reflection film, and even if dirt adheres, it is polished with a detergent and the like. This dirt is easy to remove. For this reason, when a heat ray reflective multilayer translucent plate is manufactured by using the heat ray reflective translucent plate as a constituent material, the heat ray reflective film of the heat ray reflective translucent plate becomes the multilayer light transmissive plate. Since the function of the multi-layer light-transmitting plate is not so different whether it is disposed inside or outside the heat-reflective light-transmitting plate, the heat-ray reflective light-transmitting plate is used as its constituent material. Even in the case of manufacturing a layered light-transmitting plate, generally, it is not particularly necessary to previously distinguish the film surface of the heat ray reflective light-transmitting plate from the other surface.

Further, according to the heat ray reflective translucent plate of the present invention, the outermost layer of the heat ray reflective films formed by laminating a plurality of films is made of an amorphous material. By adjusting the film thickness of the outermost layer and other films as necessary at the time of manufacturing, etc., the color tone of this heat ray reflective light-transmitting plate can be relatively freely adjusted. A heat ray reflective light-transmitting plate having a desired color tone according to use or taste can be manufactured by a relatively simple process.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a part of a heat ray reflective glass according to a first embodiment in which the present invention is applied to a heat ray reflective glass.

FIG. 2 is a longitudinal sectional view of a part of a heat ray reflective glass in a second embodiment in which the present invention is applied to a heat ray reflective glass.

FIG. 3 is a longitudinal sectional view of a part of a heat ray reflective glass according to a third embodiment in which the present invention is applied to a heat ray reflective glass.

FIG. 4 is a graph showing the optical characteristics of the heat ray reflective glass shown in FIG. 3 together with the optical characteristics of a comparative example.

FIG. 5 is a vertical cross-sectional view of an embodiment in which the present invention is applied to a heat ray-reflective multilayer glass, in which an intermediate portion of the heat ray-reflective multilayer glass is omitted.

FIG. 6 is a longitudinal sectional view of a part of a conventional heat ray reflective glass.

[Explanation of symbols]

Reference Signs List 20 heat ray reflection glass 21 heat ray reflection film 22 transparent glass substrate 23 SnO ₂ film 24 SiO ₂ film 30 heat ray reflection glass 31 heat ray reflection film 32 transparent glass substrate 34 SiO ₂ film 35 SnO ₂ film 36 SiO ₂ film 40 heat ray reflection glass 41 heat ray Reflection film 42 Transparent glass substrate 43 SnO ₂ film 44 SiO ₂ film 45 SnO ₂ film 46 SiO ₂ film 50 Heat ray reflection double glass 51 Heat ray reflection glass 52 Second transparent glass 57 Heat ray reflection film 58 Transparent glass substrate

Claims (10)

[Claims] 1. A heat ray reflective film formed by laminating a plurality of films on a light transmitting substrate, wherein the outermost film of the heat ray reflective film is made of an amorphous material. A heat ray reflective translucent plate characterized by the following. 2. The heat ray reflective film, wherein a film immediately inside the outermost layer film is made of a crystalline material having a higher refractive index than the outermost layer film. 1
4. The heat-reflective translucent plate according to item 1. 3. An inner film made of a material having a relatively high refractive index and functioning as a heat ray reflective film main body on a light transmitting substrate;
3. The heat-reflective light-transmitting plate according to claim 1, wherein an outermost layer made of an amorphous material having a relatively low refractive index is sequentially laminated. 4. An innermost film made of a material having a relatively low refractive index, an intermediate film made of a material having a relatively high refractive index, and functioning as a heat ray reflective film main body, on a light transmitting substrate.
3. The heat-reflective light-transmitting plate according to claim 1, wherein an outermost layer made of an amorphous material having a relatively low refractive index is sequentially laminated. 5. An innermost layer made of a material having a relatively high refractive index, a first intermediate film made of a material having a relatively low refractive index, and a first intermediate film made of a material having a relatively low refractive index. A second intermediate film made of a relatively high material and an outermost film made of an amorphous material having a relatively low refractive index are sequentially laminated, and the innermost film and the second intermediate film are stacked. 3. The heat-reflective light-transmitting plate according to claim 1, wherein one of the light-reflective films is configured to function as a heat-ray reflective film main body. 6. The semiconductor device according to claim 1, wherein said amorphous material is at least one selected from the group consisting of silicon oxide, aluminum oxide, and tin / silicon composite oxide. 4. The heat-reflective light-transmitting plate described in any one of the above. 7. A method according to claim 1, wherein said substance having a relatively low refractive index is at least one selected from the group consisting of silicon oxide, aluminum oxide and tin / silicon composite oxide. The heat-reflective light-transmitting plate according to any one of the above. 8. The substance having a relatively high refractive index is tin oxide,
The metal oxide according to claim 1, wherein the metal oxide is at least one metal oxide selected from the group consisting of indium oxide, zinc oxide, and cadmium oxide.
4. The heat-reflective light-transmitting plate described in any one of the above. 9. The heat ray-reflective translucent light according to claim 1, wherein the translucent substrate is a glass plate that is substantially transparent at least in a visible light region. Board. 10. A heat-reflective light-transmitting plate according to any one of claims 1 to 9, and at least one second light-transmitting plate arranged to face the heat-ray reflective light-transmitting plate. The heat ray reflective film provided on the heat ray reflective translucent plate is a side facing the at least one second light transmissive plate of both surfaces of the heat ray reflective translucent plate. The heat ray reflective multilayer light transmissive plate, wherein the heat ray reflective light transmissive plate and the at least one second light transmissive plate are coupled to each other so as to be disposed on opposite surfaces.