JP2000086298A - Sunlight-shielding transparent substrate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a color close to neutral in any of the transmitted color, film face-reflected color and non-film face-reflected color by forming a first layer of transparent dielectric in specified thickness, a second layer consisting essentially of noble metal in specified thickness and a third layer of transparent dielectric in specified thickness in this order from the substrate side. SOLUTION: A first layer, a second layer and a third layer are successively formed on one-face side of a glass plate. The first layer is formed with a transparent dielectric having 10-67 nm thickness, the second layer has 6-22 nm thickness and consists essentially of Ag, and the third layer has 10-67 nm thickness and is made of a transparent dielectric. As the transparent dielectric, SnO2, ZnO, ZnOAl, TaO2, TiO2, SiN, etc., are appropriately used. By such a constitution, in L*a*b* color system, a glass with the transmitted color of -5<a*<0 and -5<b*<4, the film facereflected color of -5<a*<0 and -10<b*<5 and the non-film face-reflected color of -5<a*<0 and -9<b*<5 is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transparent solar radiation shielding substrate having a heat ray reflection function.

[0002]

2. Description of the Related Art As a glass plate having a heat ray reflection function,
The one disclosed in Japanese Patent Application Laid-Open No. 9-110039 is known. This glass plate, on one side of the transparent glass plate,
The first layer is a Sn oxide film (thickness: 10 nm to 200 nm), the second layer is Ti, SUS, NiCr,
A nitride (thickness: 1 nm to 15 nm) containing these as main components, and the third layer is a Sn oxide film (thickness: 30 nm to 200 nm). The characteristics are as follows. Stimulation purity of the reflected light from the glass surface side in the visible light wavelength region is 10% or more. The main wavelength of the reflected light from the glass surface side in the visible light wavelength region is 485 nm to 510 nm. Visible light reflectance from surface side is 28% or more Visible light reflectance from film side is 25% or more Neutral transmission color of glass

In Japanese Patent Application Laid-Open No. 9-100139, Japanese Patent Application Laid-Open Nos. 63-190742, 63-252944 and 2-44 describe prior art.
No. 046, Japanese Utility Model Publication No. 4-30039,
No. 305774 is mentioned.

Japanese Patent Application Laid-Open No. 63-190742 discloses the first
The thickness of the TiO2 layer is 140 to 180 mm, the thickness of the second TiNx layer is 375 to 425 mm, and the thickness of the third TiO2 layer is 85 to 155 mm, and the reflection color from the glass substrate side is green. And the thickness of the first layer of TiO2 layer is 90-130Å,
It is disclosed that the thickness of the second TiNx layer is 380 to 420 °, the thickness of the third TiO2 layer is 155 to 200 °, and the reflection color from the glass substrate side is green.

JP-A-63-252944 discloses a transparent substrate / Ti02 (22 nm) / TiNx (80 nm) / TiO2 (84 nm).
Reflected light is green to yellowish green, and visible light transmittance is 13.2
% Are disclosed.

Japanese Patent Application Laid-Open No. 2-44046 discloses a transparent plate exhibiting a blue to green reflection color and a method for producing the same. Specifically, a transparent substrate / TiN (30 nm) / T
Visible light transmittance of 40% with iO2 (25nm) film structure, 51% visible light transmittance with transparent substrate / TiN (15nm) / TiO2 (45nm) film structure. It is disclosed that the color is green.

Japanese Utility Model Publication No. 4-30039 discloses that a transparent substrate / SnOx (19 nm) / Cr (8 nm) / SnOx (132 nm) film structure has a visible light transmittance of 30.1% and a transparent substrate / SnOx ( 79n
m) / Cr (12 nm) / SnOx (105 nm), a transparent heat ray reflector having a visible light transmittance of 26.2% and a reflection color of green is disclosed.

JP-A-6-305774 discloses a blue float glass plate / TiN (14 nm) − / TiO 2 (55n
m) / TiN (14nm) film configuration, both sides of the glass have a green reflection color tone with a reflectance of 19%, the film side has a neutral reflection color tone with a reflectance of 29%, and the transmission color is neutral A heat ray reflective glass having a color having a transmittance of 31% is disclosed.

[0009]

As described above, many solar shading glasses (heat ray reflecting glass) have been proposed. However, any of the transmitted color, the film surface reflected color and the non-film surface reflected color is neutralized. There is no color that is close, and any of the transmission color, the film surface reflection color, and the non-film surface reflection color is glaring.

[0010]

According to a first aspect of the present invention, there is provided a solar radiation-shielding transparent substrate, comprising: a first layer, a second layer, A third layer is formed, and the first layer has a thickness of 10 nm or more and 67 nm.
The second layer has a thickness of not less than 6 nm
Noble metal as the main component at 2 nm or less, thickness of the third layer is 10 nm
Made of a transparent dielectric material having a thickness of at least 67 nm or less, and L * a * b *
In the color system, the transmission color is -5 <a * <0, -5 <b * <
4. Colorless or pale blue with film surface reflection color of -5 <a * <0, -10 <b * <5, non-film surface reflection color of -5 <a * <0, -9 <b * <5 It was presented.

Further, the solar-shielding transparent substrate according to claim 2 is based on the premise that it is the solar-shielding transparent substrate according to claim 1, wherein the thickness of the first layer is 28 nm or more and 67 nm or less, and the thickness of the second layer is The thickness is 7 nm or more and 17 nm or less, and the third layer has a thickness of 1
In the L * a * b * color system, the transmission color is -5 <a * <0, -5 <b * <2, and the film surface reflection color is -3 <a * <0. , -3 <b * <4, non-film surface reflection color is -4 <
a * <0, -4 <b * <3, which were colorless or pale blue.

Further, the solar-shielding transparent substrate according to claim 3 is based on the premise that it is the solar-shielding transparent substrate according to claim 1, wherein the thickness of the first layer is 28 nm or more and 67 nm or less, and the thickness of the second layer is The thickness is 7 nm or more and 12 nm or less, and the third layer has a thickness of 1
In the L * a * b * color system, the transmission color is -4 <a * <0, -3 <b * <0, and the film surface reflection color is -3 <a * <0 in the L * a * b * color system. , -3 <b * <3, non-film surface reflection color is -4 <
a * <0, −3 <b * <2, which is colorless or pale blue.

The first and third layers may be made of tin oxide or oxide, provided that the solar-shielding transparent substrate according to claim 4 is the solar-shielding transparent substrate according to any one of claims 1 to 3. Titanium, tantalum oxide, zinc oxide, silicon nitride and
The second layer was formed of at least one of ZnOAl (zinc oxide containing Al), and was mainly composed of Ag.

Further, on the premise that the solar shading transparent substrate according to claim 5 is the solar shading transparent substrate according to claims 1 to 4, a surface of a noble metal such as Ag forming the second layer is provided. In this example, a metal layer for preventing oxidation of a noble metal such as Ag by oxidizing itself was formed.

Further, the solar-shielding transparent substrate according to claim 6 is based on the premise that it is the solar-shielding transparent substrate according to claim 5, wherein the metal layer is formed of Zn, Al, Cr, Ti, SUS (stainless steel), Ni and any of these alloys.

According to a seventh aspect of the present invention, there is provided the solar radiation-shielding transparent substrate according to any one of the first to sixth aspects, wherein the visible light transmittance is 60 to 90% and the solar radiation transmittance is 30 to 60. %. Further, in the solar shading transparent substrate according to claim 8, the transparent substrate is made of glass having a thickness of 3 to 15 mm.

Here, the thickness of the first layer is 10 nm or more and 67 nm or more.
Or less, preferably from 28 nm to 67 nm, and the thickness of the third layer is from 10 nm to 67 nm, preferably from 10 nm to 4 nm.
0 nm or less, more preferably 10 nm or more and 22 nm or less, if the thickness is less than the above range, the adhesion to glass is weakened, the durability is deteriorated, and the precious metal layer may be corroded. If it exceeds, the desired intermediate color cannot be obtained, and the thickness of the second layer is 6 nm or more and 22 nm or less, preferably 7 nm or more and 17 nm or less, more preferably 7 nm or more and 12 nm or less. This is because the desired intermediate color cannot be obtained.

[0018]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view of a solar shading transparent substrate according to the present invention.

That is, a first layer, a second layer, and a third layer are sequentially formed on one surface side of a glass plate, and the first layer has a thickness of 10
The second layer is made of a transparent dielectric having a thickness of 6 nm or more and 22 nm or less and mainly composed of Ag, and the third layer is made of a transparent dielectric having a thickness of 10 nm or more and 67 nm or less.

As the transparent dielectric, SnO 2, ZnO,.
ZnOAl, TaO2, TiO2, SiN and the like are suitable, and these may form a single layer, but may form a single layer as shown in FIG.

As for the third layer made of Ag, FIG.
As shown in the figure, a very thin metal film of about 1 nm, for example, Zn,
Any of Al, Cr, Ti, SUS (stainless steel), Ni and their alloys may be formed as an antioxidant film of Ag. In this case, Zn and the like oxidize themselves, but prevent Ag from being oxidized.

Each of the above-mentioned layers is composed of metal Sn, metal Zn,
Using an in-line type sputtering device that targets metal Ag, Zn-Al alloy, sintered body AZO (Al-doped zinc oxide sintered body), etc., the pressure is reduced, and then the target film to be obtained in the sputtering chamber is formed. In response, oxygen gas or Ar gas is introduced, power is supplied to the cathode provided with the metal target, discharge is caused, and a glass plate is passed over the electrode, thereby forming a metal film or metal oxide film (dielectric film) having a predetermined thickness. Body film).

Further, the present invention has an object to exhibit a color close to neutral in any of the transmission color, the film reflection color, and the non-film reflection color. The color perceived by light passing through the glass plate from the side where the film is formed, or light passing through the film formed from the glass side. However, the color perceived by the light reflected at each interface and returning to the film surface side, and the non-film surface reflection color is the light incident on the glass surface side, reflected at each interface and reflected on the glass plate side. This is a color sensed by the returned light. In the illustrated example, the number of reflections is simplified to one (0 in the case of a transmission color), but light reflected multiple times is also included.

As described above, the thickness of the first layer is set to 10 nm or more and 67 nm or less, and the thickness of the second layer is set to 6 nm or more and 2 nm or less.
By setting the thickness of the third layer to 10 nm or more and 67 nm or less, the transmission color in the L * a * b * color system is −5 <a.
* <0, -5 <b * <4, film surface reflection color is -5 <a * <0,-
10 <b * <5, non-film surface reflection color is -5 <a * <0, -9 <b *
<5 was obtained, and the thickness of the first layer was 28 nm.
When the thickness of the second layer is 7 nm or more and 17 nm or less, and the thickness of the third layer is 10 nm or more and 40 nm or less, the transmission color is -5 <a in the L * a * b * color system. * <
0, −5 <b * <2, film surface reflection color is −3 <a * <0, −3 <
b * <4, a glass plate having a non-film surface reflection color of -4 <a * <0 and -4 <b * <3 can be obtained.
By setting the thickness of the second layer to 7 nm or less and 12 nm or less and the thickness of the third layer to 10 nm or more and 22 nm or less, in the L * a * b * color system, the transmission color becomes -4 <a *. <0,
-3 <b * <0, reflected color on film surface is -3 <a * <0, -3 <b * <
3. A glass plate having a non-film surface reflection color of -4 <a * <0 and -3 <b * <2 is obtained.

Here, in the L * a * b * color system, as shown in FIG. 4, + on the axis of a * represents the intensity of red,-represents the intensity of green,
The + on the b * axis indicates the intensity of yellow, and the-indicates the intensity of blue.

On a float glass plate having a thickness of 3 mm, a first layer, a second layer and a third layer are formed to a predetermined thickness by a known sputtering method to produce Examples 1 to 9. The visible light transmittance, solar transmittance and transmitted color of each example are shown in the following (Table 1), and the film surface visible light reflectance, film surface solar reflectance and film surface reflected color of each example are shown below (Table 1). Table 2) shows the non-film surface visible light reflectance, non-film surface solar reflectance and non-film surface reflection color of each of the examples (Table 3).

[0027]

[Table 1]

[Table 2]

[Table 3]

The first layer, the second layer, and the third layer are formed to a predetermined thickness on a 10 mm-thick float glass plate in the same manner as the 3 mm-thick float glass plate. The visible light transmittance, solar transmittance and transmitted color of each example are shown in the following (Table 4), and the film surface visible light reflectance, film surface solar reflectance and film surface reflected color of each example are shown below. Table 5 shows the non-film surface visible light reflectance, non-film surface solar reflectance and non-film surface reflection color of each Example.

[0029]

[Table 4]

[Table 5]

[Table 6]

In the same manner as the float glass plate having a thickness of 3 mm, the first layer, the second layer and the third layer were respectively formed to have a predetermined thickness on a float glass plate having a thickness of 15 mm to manufacture Examples 19 to 27. The visible light transmittance, solar transmittance and transmitted color of each example are shown in Table 7 below, and the film surface visible light reflectance, film surface solar reflectance and film surface reflected color of each example are shown below. Table 8 shows the non-film surface visible light reflectance, non-film surface solar reflectance, and non-film surface reflection color of each Example.

[0031]

[Table 7]

[Table 8]

[Table 9]

[0032]

According to the present invention as described above,
On one side of a transparent substrate such as a glass plate, in order from the substrate side,
A first layer, a second layer and a third layer are formed, and the first layer has a thickness of 10 nm to 67 nm, preferably 28 nm to 67 nm.
The following transparent dielectric is used, and the second layer has a thickness of 6 nm or more and 22 nm or more.
In the following, it is preferably 7 nm or more and 17 nm or less, more preferably 7 nm or more and 12 nm or less and mainly containing a noble metal such as Ag.
Since the layer is a transparent dielectric having a thickness of 10 nm or more and 67 nm or less, preferably 10 nm or more and 40 nm or less, and more preferably 10 nm or more and 22 nm or less, the transmission color, film surface reflection color, and non-film surface reflection color are all neutral. Those exhibiting close colors are obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a solar-shielding transparent substrate according to the present invention, particularly showing light exhibiting a transmission color, a film surface reflection color, and a non-film surface reflection color.

FIG. 2 is a cross-sectional view of a solar shading transparent substrate according to another embodiment.

FIG. 3 is a cross-sectional view of a solar shading transparent substrate according to another embodiment.

FIG. 4 is an explanatory diagram of an L * a * b * color system

Claims (8)

[Claims] A first layer, a second layer, and a third layer are formed on one surface side of a transparent substrate such as a glass plate in order from the substrate side, and the first layer has a thickness of 10 nm or more and 67 nm or less. The second layer has a thickness of 6 nm or more and 22 nm or less and is mainly composed of a noble metal, the third layer is made of a transparent dielectric material having a thickness of 10 nm or more and 67 nm or less, and further, in the L * a * b * color system,
Transmission color is -5 <a * <0, -5 <b * <4, film surface reflection color is-
5 <a * <0, -10 <b * <5, non-film surface reflection color is -5 <a *
A sunlight-shielding transparent substrate exhibiting a colorless or pale blue color of <0, -9 <b * <5. 2. The sunlight-shielding transparent substrate according to claim 1, wherein the first layer has a thickness of 28 nm to 67 nm, the second layer has a thickness of 7 nm to 17 nm, and the third layer has a thickness of 1 nm.
In the L * a * b * color system, the transmission color is -5 <a * <0, -5 <b * <2, and the film surface reflection color is -3 <a * <0. , -3 <b * <4, non-film surface reflection color is -4 <
A sunlight-shielding transparent substrate exhibiting a * <0 and -4 <b * <3 in a colorless or pale blue color. 3. The solar-shielding transparent substrate according to claim 1, wherein the first layer has a thickness of 28 nm to 67 nm, the second layer has a thickness of 7 nm to 12 nm, and the third layer has a thickness of 1 nm.
In the L * a * b * color system, the transmission color is -4 <a * <0, -3 <b * <0, and the film surface reflection color is -3 <a * <0 in the L * a * b * color system. , -3 <b * <3, non-film surface reflection color is -4 <
A sunlight-shielding transparent substrate, which exhibits a colorless or pale blue color with a * <0 and -3 <b * <2. 4. The solar shading transparent substrate according to claim 1, wherein the first layer and the third layer are formed of tin oxide, titanium oxide, tantalum oxide, zinc oxide, silicon nitride, and silicon nitride.
A sunlight-shielding transparent substrate formed of at least one of ZnOAl (zinc oxide containing Al), wherein the second layer is mainly composed of Ag. 5. The solar radiation-shielding transparent substrate according to claim 1, wherein the surface of the film mainly composed of a noble metal constituting the second layer is oxidized by itself to oxidize the noble metal. A solar radiation-shielding transparent substrate, wherein a metal layer for preventing solar radiation is formed. 6. The solar shading transparent substrate according to claim 5, wherein the metal layer is any one of Zn, Al, Cr, Ti, SUS (stainless steel), Ni, and an alloy thereof. Sunshine shielding transparent substrate. 7. The solar-shielding transparent substrate according to claim 1, wherein the solar-shielding transparent substrate has a visible light transmittance of 60 to 90% and a solar transmittance of 30 to 60.
% Of the solar-shielding transparent substrate. 8. The solar shading transparent substrate according to claim 1, wherein said transparent substrate is a glass having a thickness of 3 to 15 mm.