AU2016267286C1 - Laminated glass - Google Patents

Abstract

In a laminated glass according to the present invention, a first glass plate has first and second surfaces, a second glass plate has third and fourth surfaces, the first surface is located on a farther side from an intermediate film than where the second surface is located, the fourth surface is located on a farther side from the intermediate film than where the third surface is located, the first and second surfaces are provided with a first coating film, and the fourth surface is provided with a second coating film. Rv

Description

TITLE OF THE INVENTION

Laminated glass

BACKGROUND OF THE INVENTION

1. Field of the Invention

The disclosure herein generally relates to a laminated

glass.

2. Description of the Related Art

According to the recent increase in the awareness of

energy saving, there are more and more examples of application

of multilayered glass as window glasses of buildings or the

like. Multilayered glass is configured by laminating two glass

plates each other via an air layer. In the multilayered glass,

heat is prevented from transferring from one glass plate to the

other glass plate according to the presence of the internal air

layer, and a heat shielding performance and a heat insulating

performance can be enhanced.

[Citation List]

[Patent Literature]

[PTL 1] Japanese Unexamined Patent Application Publication No.

2015-511570

SUMMARY OF THE INVENTION

However, there is a problem that generally it is

difficult to reduce a thickness of a multilayered glass

structurally. For example, in a typical multilayered glass,

when a thickness of the air layer is reduced, a heat shielding

function and a heat insulating function become unable to be

provided sufficiently, and the air layer has the thickness of at

least 10 mm to 15 mm. Due to the above-described limitation of

thickness, the multilayered glass may be difficult to be applied

depending on its usage.

Thus, in order to respond to the above-described

demand, a laminated glass is considered to be applied instead of the multilayered glass. This is because the laminated glass includes two glass plates and an intermediate film between the glass plates (i.e. without a thick air layer), and a thinner structure can be easily constructed.

For example, Patent Document 1 discloses a laminated

glass provided with a sun protection function and a heat

insulating function. However, in the laminated glass, compared

with the multilayered glass, it is difficult to satisfy both of

sufficiently providing the heat shielding function and the heat

insulating function and solving a problem due to appearance,

such as a glare by a decrease in transmittance or by reflection.

At the present time, the application as a window glass of a

building has not been progressed.

The present invention was made in view of such a

background, and the present invention provides a laminated

glass that satisfies one or both of the heat shielding function

and the heat insulating function, and optionally the appearance

performance.

According to an aspect of an embodiment, a laminated

glass including a first glass plate; and a second glass plate

that is bonded to the first glass plate via an intermediate

film,

the first glass plate having a first surface and a

second surface opposite to each other, the second glass plate

having a third surface and a fourth surface opposite to each other, the first surface being arranged farther from the intermediate film than the second surface, and fourth surface being arranged farther from the intermediate film than the third surface, a first coating film being arranged on the first surface or the second surface, a second coating film being arranged on the fourth surface, from the first glass plate of the laminated glass side, a visible light reflectance represented as Rvout (%) that is measured in conformity with ISO 9050:2003, a solar radiation heat reception rate represented as a g value, a visible light transmittance represented as Tv (%) and a shielding coefficient represented as SC that is obtained by formula (1) SC = g-value / 0.88 (formula (1)) satisfying Rvout 30%, Tv > 26%, and SC 0.35, and when quantifying reflected light obtained, in conformity with ISO 9050:2003, for light incident with angles of 5 degrees and 55 degrees from the first glass plate side by expressing with CIE1976L*a*b* chromaticity coordinates, values of a* and b* being both 3 or less, is provided. According to another aspect of the embodiment, a laminated glass including a first glass plate; and a second glass plate that is bonded to the first glass plate via an intermediate film, the first glass plate having a first surface and a second surface opposite to each other, the second glass plate having a third surface and a fourth surface opposite to each other, the first surface being arranged farther from the intermediate film than the second surface, and the fourth surface being arranged farther from the intermediate film than the third surface, a first coating film being arranged on the second surface, a second coating film being arranged on the fourth surface, the first coating film including two layers mainly including silver or a silver alloy, and the layer of the two layers that is closer to the second surface being thicker than the other layer, is provided. According to yet another aspect of the embodiment, a laminated glass including a first glass plate; and a second glass plate that is bonded to the first glass plate via an intermediate film, the first glass plate having a first surface and a second surface opposite to each other, the second glass plate having a third surface and a fourth surface opposite to each other, the first surface being arranged farther from the intermediate film than the second surface, and the fourth surface being arranged farther from the intermediate film than the third surface, a first coating film being arranged on the second surface, a second coating film being arranged on the fourth surface, the first coating film including two layers mainly including silver or a silver alloy, and the thickness of a layer of the two layers closer to the second surface being less than 10 nm, and a ratio of a thickness of the other layer to the thickness of the layer closer to the second surface being 2.5 or more, is provided.

[Advantageous effect of Invention] According to an aspect of the present invention, a laminated glass that satisfies both of the heat shielding function and the heat insulating function, and of the appearance performance, can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS

[FIGURE 1] FIG. 1 is a diagram schematically depicting a cross section of a laminated glass according to an embodiment.

[FIGURE 2] FIG. 2 is a diagram schematically depicting an example of a configuration of a first coating film in the laminated glass according to the embodiment.

[FIGURE 3] FIG. 3 is a diagram schematically depicting an example of a configuration of a second coating film in the laminated glass according to the embodiment.

[FIGURE 4] FIG. 4 is a diagram schematically depicting a cross section of another laminated glass according to an embodiment.

[FIGURE 5] FIG. 5 is a diagram schematically depicting an example of a configuration of a third coating film in the other laminated glass according to the embodiment.

[FIGURE 61 FIG. 6 is a diagram schematically depicting another example of the configuration of the third coating film in the other laminated glass according to the embodiment.

[FIGURE 7]

FIG. 7 is a graph in which relations between visible light transmittance Tv (%) and shielding coefficients SC obtained for the respective laminated glasses are plotted.

[FIGURE 8] FIG. 8 is a graph in which relations between visible light transmittance Tv (%) and visible light reflectance Rvout (%) obtained for the respective laminated glasses are plotted.

[FIGURE 9] FIG. 9 is a graph in which relations between energy transmittance Te (%) of a first glass and the shielding coefficients, SC, obtained for the respective laminated glasses are plotted.

[FIGURE 10] FIG. 10 is a graph in which relations between energy reflectance Reout (%) obtained for the respective laminated glasses and the shielding coefficients, SC, are plotted.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following, with reference to drawings, an embodiment of the present invention will be described. (Laminated glass according to embodiment) First, with reference to FIG. 1, a laminated glass according to the embodiment will be described. FIG. 1 schematically illustrates a cross section of the laminated glass according to the embodiment (in the following, referred to as a "first laminated glass"). As illustrated in FIG. 1, the first laminated glass includes a first glass plate 110, a second glass plate 120, and an intermediate film 130 arranged between both the glass plates 110, 120.

The first glass plate 110 has a first surface 112 and a second surface 114 opposite to each other. The second glass plate 120 has a third surface 122 and a fourth surface 124 opposite to each other. The intermediate film 130 is arranged between the second surface 114 and the third surface 122 in order to bond the first glas plate 110 and the second glass plate 120. The first surface 112 of the first glass plate 110 is arranged so as to be closer to a first "outside" 101 of the first laminated glass 100, than the second surface 114. The fourth surface 124 of the second glass plate 120 is arranged so as to be closer to a second "outside" 102 of the first laminated glass 100, than the third surface 122. Note that the above-described terms "outside" are different from the term "outdoor side"/"indoor side" which will be used when the first laminated glass 100 is actually installed in an installation place such as a building. That is, in an environment where the first laminated glass 100 is used, the first "outside" 101 of the first laminated glass 100 corresponds to the "outdoor side", and the second "outside" 102 of the first laminated glass 100 corresponds to the "indoor side". On the first surface 112 of the first glass plate 110, a first coating film 150 is arranged. Moreover, on the fourth surface 124 of the second glass plate 120, a second coating film 170 is arranged. The first coating film 150 and the second coating film 170 may be single layered films or may be laminated layered films. By arranging the first coating film on the first surface of the first glass plate, it becomes possible to add a stain proofing function to the first laminated glass 100. In order to add a preferable stain proofing function, an arithmetic average roughness Ra of a surface of the first coating film is preferably 1 nm or more and 13 nm or less, and a ratio of a Peak-valley value (PV value) of the surface of the first coating film to the arithmetic average roughness Ra, i.e. PV/Ra, is preferably 15 or less. Moreover, by arranging the second coating film on the fourth surface of the second glass plate, it becomes possible to add a heat insulating function/heat shielding function to the first laminated glass 100. Moreover, the second coating film is preferably provided with durability. For example, in the second coating film, after a perspiration resistance test in conformity with ISO 12870 for three days, a number of defects within a range of 1 mm x 1 mm measured by observing a surface of the second coating film with a microscope of 50 times magnification is preferably 50 or less. According to the presence of the coating films 150, 170, in the first laminated glass 100, the following feature is obtained. That is, from the first outside 101, i.e. the first glass plate 110 side, a visible light reflectance represented as Rvout (%) that is measured in conformity with ISO 9050:2003, a solar radiation heat reception rate represented as a g-value, and a shielding coefficient represented as SC that is obtained by dividing g-value by 0.88, as expressed by the following formula (1) SC= g-value / 0.88, (formula (1)) satisfy RVout 30%, Tv > 26%, and SC 0.35. The solar radiation heat reception rate, g-value, is expressed by a percentage of an entire solar heat entering from one outside of the laminated glass, of a sum of heat directly transmitted to the second outside (transmission heat) and heat absorbed inside the laminated glass and afterwards emitted to the second outside.

Moreover, the shielding coefficient, SC, is an index indicating the heat shielding function of the laminated glass. The smaller the value of SC is, the higher the heat shielding function of the laminated glass is. The shielding coefficient SC of the first laminated glass 100 is 0.35 or less, and is sufficiently small. A sufficient heat shielding characteristic can be obtained. The shielding coefficient SC is preferably 0.33 or less. Moreover, in the first laminated glass 100, because the visible light reflectance Rvout is controlled to less than or equal to 30%, when the first laminated glass 100 is viewed from the first outside 101, a noticeable glare is not likely to occur, and the design property can be prevented significantly from degrading. According to the above-described features, the first laminated glass 100 can exert an excellent heat shielding characteristic without degrading the design property, when the first laminated glass 100 is applied as a window of a building, for example. Note that, in the laminated glass described in the embodiment, only from its appearance, it is difficult to determine which outside is the first outside 101 or the second outside 102. Actually, when an intended laminated glass has the above-described configuration, and furthermore a visible light reflectance Rvout (%) measured from either one of the outsides and a shielding coefficient SC satisfy the above-described conditions, such laminated glass is regarded as the laminated glass according to the embodiment. (Respective members configuring laminated glass) Next, respective members configuring the first laminated glass 100 having the above-described features will be described in more detail. Note that in the following description, when indicating the respective members, for clarification, the reference numerals used in FIG. 1 will be used. (Glass plates 110, 120) The first glass plate 110 is, for example, configured of a soda lime glass, a borosilicate glass, an alkali-free glass, or an aluminosilicate glass. Moreover, the glass plate 110 may be transparent or may be colored. A color of the glass plate 110 is not particularly limited. The glass plate 110 may be green or blue, for example. The same applies to the second glass plate 120 as the first glass plate 110. Note that the second glass plate 120 may have different composition and/or different color from the first glass plate 110. Thicknesses of the glass plates 110, 120 are not particularly limited. The thicknesses fall, for example, within the range of 2 mm to 12 mm. Note that the first glass plate 110 may have a different thickness from the second glass plate 120. The glass plates 110, 120 may be a strengthened glass, particularly a chemically strengthened glass. By using the chemically strengthened glass, the strength of the laminated glass can be enhanced, and the laminated glass can be preferably used in upper floors of a building or the like. (Intermediate film 130) In the first laminated glass 100, as long as the above-described features are satisfied, as the intermediate film 130, any intermediate film that has been conventionally used can be used. Typical intermediate film 130 includes a thermoplastic resin and a plasticizing agent.

The thermoplastic resin includes, for example, a polyvinyl butyral resin, a polyvinyl acetal resin, an ethylene-vinyl acetate copolymer resin, an ethylene acrylic copolymer resin, a polyurethane resin, or a polyvinyl alcohol resin. A thermoplastic resin other than the above may be used. The plasticizing agent includes, for example, an organic ester plasticizing agent, such as a monobasic organic acid ester or a polybasic organic acid ester, a phosphoric acid plasticizing agent, such as an organic phosphate plasticizing agent, or an organic phosphite plasticizing agent. A plasticizing agent other than the above may be used. A thickness of the intermediate film 130 is not particularly limited. The thickness falls, for example, within a range of 0.1 mm to 3 mm. (Coating films 150, 170) The coating films 150 and 170 are configured so as to obtain the above-described visible light reflectance Rvout (%) and the shielding coefficient SC, when being applied to the glass plates 110 and 120, respectively. In the following, with reference to FIGs. 2 and 3, respective configuration examples of the first coating film 150 and the second coating film 170 will be described. (Configuration example of first coating film 150) FIG. 2 schematically depicts an example of the configuration of the coating film 150. As illustrated in FIG. 2, in this configuration, the coating film 150 includes three layers: an undercoat layer 152, a conductive oxide layer 153, and a high refractive index layer 154. The high refractive index layer means a layer having a refractive index of greater than 2. The undercoat layer 152 has a role of preventing predetermined elements from mutually diffusing between the first glass plate 110 and the conductive oxide layer 153. The undercoat layer 152 is, for example, configured of a silicon oxide (SiOx) that is a material mainly including silica. In the present application, "mainly including a "means material 'A' that an intended layer includes at least 50 mass% of the material 'A'. A thickness of the undercoat layer 152 falls, for example, within a range of 10 nm to 100 nm. In addition, the undercoat layer is not necessarily a single layer, but may include a plurality of layers. By preparing a multilayered configuration for the undercoat layer, an alkali barrier performance becomes higher, and an effect that adjusting a reflection color tone becomes easier can be obtained, and it is preferable from a viewpoint of an excellent appearance performance and enhancement of the durability. The conductive oxide layer 153 is, for example, configured of a material mainly including conductive tin oxide. The conductive oxide layer 153 may be, for example, configured of tin oxide doped with antimony and/or fluorine. The term "conductive layer" means a film with an emissivity of 0.4 or less. A thickness of the conductive oxide layer 153 falls, for example, within a range of 50 nm to 500 nm. The high refractive index layer 154 has a role of adjusting a reflection characteristic for light entering the coating film 150. A thickness of the high refractive index layer 154 falls, for example, within a range of 10 nm to 70 nm. In the configuration example illustrated in FIG.

2, the undercoat layer 152 and the high refractive index layer 154 are not required components, and may be omitted. Moreover, in the first coating film 150, as long as the above-described visible light reflectance Rvout (%) and the shielding coefficient SC are obtained, on interfaces of the respective layers 152, 153 and 154, or in an upper part of the high refractive index layer 154, a different layer may be present. A method of forming the first coating film 150 having the above-described configuration is not particularly limited. The first coating film 150 is configured, for example, by serially depositing the respective layers using a method selected from a physical deposition method (e.g. a vacuum deposition method, an ion plating method, and a sputtering method), a chemical deposition method (e.g. thermal CVD method, a plasma CVD method, and an optical CVD method), and an ion beam sputtering method. An entire thickness of the first coating layer 150 falls, for example, within a range of 70 nm to 670 nm, preferably within a range of 100 nm to 500 nm. Energy transmittance Te (%) obtained in conformity with ISO 9050:2003 for laminated layers of the first glass plate and the first coating film is preferably 50% or less. (Configuration example of Second coating film 170) FIG. 3 schematically depicts an example of the configuration of the coating film. As illustrated in FIG. 3, in this configuration, the second coating film 170 includes two layers: an undercoat layer 172 and a conductive oxide layer 173. The undercoat layer 172 has a role of preventing predetermined elements from mutually diffusing between the second glass plate 120 and the conductive oxide layer 173. The undercoat layer 172 is, for example, configured of a silicon oxide (SiOx) that is a material mainly including silica. A thickness of the undercoat layer 172 falls, for example, within a range of 10 nm to 100 nm. The conductive oxide layer 173 is, for example, configured of a material mainly including conductive tin oxide. The conductive oxide layer 173 may be, for example, configured of tin oxide doped with antimony and/or fluorine. In the case of the conductive oxide layer 173 configured of tin oxide doped with antimony, because a transmission color tone is not likely to become yellow, it is especially preferable according to an excellent appearance performance. Moreover, in the case of the conductive oxide layer 173 configured of tin oxide doped with fluorine, because a durability of the film becomes higher, it is especially preferable for use that requires higher durability. A thickness of the conductive oxide layer 173 falls, for example, within a range of 50 nm to 500 nm. In the configuration example illustrated in FIG. 3, the undercoat layer 172 is not a required component, and may be omitted. Moreover, in the second coating film 170, as long as the above-described shielding coefficient SC is obtained, on interfaces of the respective layers 172, and 173, or in an upper part of the conductive oxide layer 173, a different layer may be present. A method of forming the second coating film 170 having the above-described configuration is not particularly limited. The second coating film 170 is configured, for example, by serially depositing the respective layers using a method selected from a physical deposition method (e.g. a vacuum deposition method, an ion plating method, and a sputtering method), a chemical deposition method (e.g. thermal CVD method, a plasma CVD method, and an optical CVD method), and an ion beam sputtering method. For example, the second coating film 170 may be formed using an online CVD method. The term "online (deposition method)" means a method in which a film is deposited on a surface of a glass during a manufacturing process of the glass. More specifically, upon manufacturing the glass, a glass ribbon moves on a molten tin bath and is slowly cooled, and thereby glass is continuously manufactured. In the "online (deposition method)", during a glass ribbon moving, a film is deposited on an upper surface of the glass ribbon. That is, in the "online (deposition method)", the manufacturing process of glass and the deposition process of film are performed consecutively. An entire thickness of the second coating layer 170 falls, for example, within a range of 60 nm to 600 nm, preferably within a range of 100 nm to 500 nm. In addition, the second coating film is preferably a film with an emissivity of 0.4 or less. (First laminated glass 100) In addition to the above, the first laminated glass 100 has the following characteristics. (Visible light transmittance) In the first laminated glass 100, a visible light transmittance Tv (%) measured from the first side 101 using the method in conformity with ISO 9050:2003 satisfies the following relation: Tv (%) > 26%.

With the first laminated glass 100 having such a visible light transmittance Tv (%), when applied as a window glass of a building, sufficient daylighting can be obtained. Particularly, the visible light transmittance Tv (%) is greater than 28%, and preferably greater than 30%. From a viewpoint of an anti-glare property, the visible light transmittance Tv (%) is preferably less than or equal to 60%. (Reflected color) In the first laminated glass 100, when quantifying reflected light obtained in conformity with ISO 9050:2003 for light incident with angles of 5 degrees and 55 degrees from the first side 101 by expressing with CIE1976L*a*b* chromaticity coordinates, values of a* and b* satisfy the following relations: a* < 3 and b* < 3. Typically, from an aesthetic perspective, for a reflected color, light blue color to light green color are preferred, and red color to yellow color tend to be avoided. In the first laminated glass 100, a* and b* are within the above-described ranges, the reflected color is prevented from becoming a red color to yellow color, and the reflected color excellent in design effect can be provided. Particularly, at least any one of a* and b* preferably satisfies the following relations: a* > -30 or b* > -30. In this case, an obtained reflected color is in a region of light blue color to light green color, and the design effect is further improved. In the region, particularly, by adjusting color so as to satisfy the following relations: a* > -10 and b* > -20, it becomes possible to adjust to a color that can be easily harmonized with an exterior wall of a building. (Energy reflectance) The first laminated glass 100 has a feature that, from the first side 101, a visible light reflectance represented as Rvout (%) that is measured in conformity with ISO 9050:2003, a solar radiation heat reception rate represented as a g-value, and a shielding coefficient represented as SC that is obtained by formula (1) SC= g-value / 0.88 (formula (1)) satisfy Rvout 30% and SC 0.35. Typically, in order to reduce the SC value, decreasing the energy transmittance Te and increasing the energy reflectance Reout are both effective. Particularly, when the energy transmittance Te of the laminated layers of the first glass plate and a first coating film is 50% or less, and the second coating film is a film with an emissivity of 0.4 or less, the relation SC 0.35 can be obtained. Moreover, particularly, when the energy reflectance from the first glass plate side of the first laminated glass 100 satisfies 4% Reout, the feature that SC 0.35 is obtained. In addition, when it is configured so that 15% Reout, it becomes easier to adjust the shielding coefficient SC to SC 0.33, and is preferable. Note that, the energy reflectance Reot is more preferably 15% or more. As described above, by satisfying the relations for the shielding coefficient SC, the visible light reflectance Rvout, the visible light transmittance Tv, and the reflected color a* and b*, simultaneously, a laminated glass, for which particularly a heat shielding performance, a heat insulating performance and an appearance performance are satisfied, can be prepared. (Another laminated glass according to the embodiment of the present invention) Next, with reference to FIG. 4, a laminated glass according to another embodiment of the present invention will be described. FIG. 4 schematically illustrates a cross section of a laminated glass according to another embodiment of the present invention (in the following, referred to as a "second laminated glass"). As illustrated in FIG. 4, the second laminated glass 200 includes a first glass plate 210, a second glass plate 220, and an intermediate film 230 arranged between both glass plates 210, 220. The first glass plate 210 has a first surface 212 and a second surface 214 that are opposite to each other. The second glass plate 220 has a third surface 222 and a fourth surface 224 that are opposite to each other. The first glass plate 210 and the second glass plate 220 are bonded to each other via the intermediate film 230. The first glass plate 210 and the second glass plate 220 are arranged so that the first surface 212 of the first glass plate 210 is closer to the first "outside" 201 of the second laminated glass 200 than the second surface 214, and the fourth surface 224 of the second glass plate 220 is closer to the second "outside" 202 of the second laminated glass 200 than the third surface 222. On the fourth surface 224 of the second glass plate 220, a second coating film 270 is arranged. In the second laminated glass 200, different from the above-described first laminated glass 100, on the second surface 214 of the first glass plate 210 a coating film (in the following, referred to as a "third coating film") 280 is arranged. The second coating film 270 and the third coating film 280 may be single layered films or may be multi-layered films. By arranging a coating film on the second surface of the first glass plate, a haze can be controlled, which is preferable. Moreover, because a coating film is arranged on the second surface 214 of the first glass plate 210, even if a durability of the coating film is not high, the coating film can be preferably used. Particularly, a silver film can be preferably used. According to the presence of the coating films 270 and 280, in the second laminated glass 200, features that from the first outside 101 i.e. from the first glass plate 210 side, a visible light reflectance represented as Rvout (%) that is measured in conformity with ISO 9050:2003, a solar radiation heat reception rate represented as a g value, and a shielding coefficient represented as SC that is obtained by the above-described formula (1) satisfy Rvout 30% and SC 0.35, are obtained. Typically, in order to reduce the SC value, decreasing the energy transmittance Te and increasing the energy reflectance Re0 u are both effective. Particularly, when the energy transmittance Te of the laminated layers of the first glass plate and the first coating film is 50% or less, and the second coating film is a film with an emissivity of 0.4 or less, the feature SC 0.35, and furthermore the feature SC 0.33 are likely to be obtained. Moreover, particularly, when the energy reflectance from the first glass plate side of the first laminated glass 200 satisfies 4% Reout, the feature SC 0.35 and furthermore the feature SC 0.33 are likely to be obtained.

According to the above-described features, also in the second laminated glass 200, for example, upon applying as a window of a building, without degrading the design property, an effect of obtaining an excellent heat shielding characteristic can be obtained. Note that among the members configuring the second laminated glass 200, for the members other than the third coating film 280, indicated descriptions related to the members of the above-described first laminated glass 100 can be referred. Then, in the following, some configuration examples of the third coating film 280 of the second laminated glass 200 will be described. (Configuration example of the third coating film 280) (First configuration example) The third coating film 280 may have the same configuration (first configuration) as the first coating film 150 illustrated in FIG. 2. Because the first configuration is apparent from the description related to the above-described first coating film 150, the description will be omitted. (Second configuration example) FIG. 5 schematically depicts an example of a second configuration of the third coating film 280. As illustrated in FIG. 5, in the configuration, the third coating film 280 is configured from three layers, i.e. a first dielectric layer 282, a functional layer 283, and a second dielectric layer 284. The first dielectric layer 282 is configured of a dielectric body including a metal oxide, a metal nitride, a metal oxynitride and/or the like. The metal includes zinc, tin, titanium, silicon, aluminum, chromium, nickel, niobium, an alloy thereof, and the like.

In addition, a dielectric body configuring the first dielectric layer 282 may be doped with an added material. The added material may include, for example, an oxide, a nitride and/or an oxynitride of tin, aluminum, chromium, titanium, silicon, boron, magnesium, gallium and the like. Particularly, the first dielectric layer 282 is preferably configured of a material mainly including zinc oxide, or a material mainly including silicon nitride. In this case, in the first dielectric layer 282, at least one oxide selected from tin, aluminum, chromium, titanium, silicon, boron, magnesium, gallium and the like may be added. A thickness of the first dielectric layer 282 falls, for example, within a range of 10 nm to 80 nm. For example, the first dielectric layer 282 need not be a single layer, and may be configured of a plurality of layers. The functional layer 283 includes a material mainly including silver or a silver alloy, or a nitride of at least one metalof niobium, tantalum, molybdenum and zirconium. When the functional layer 283 is configured of silver alloy, the functional layer 283 may include at least one kind of metal selected from silver, palladium, gold, chromium, cobalt, and nickel. These metals may be included at a fraction of 0.1 mass% or more with respect to the entirety of the functional layer 283. A thickness of the functional layer 283 falls, for example, within a range of 7 nm to 30 nm, and falls preferably within a range of 10 nm to 25 nm. For the second dielectric layer 284, the above described description related to the first dielectric layer 282 can be referred. The second dielectric layer

284 may be configured of the same material as the first dielectric layer 282, or may be configured of a different material from the first dielectric layer 282. A thickness of the second dielectric layer 284 falls, for example, within a range of 10 nm to 150 nm, and falls preferably within a range of 20 nm to 130 nm. In addition, the second dielectric layer 284 need not be a single layer, and may be configured of a plurality of layers. A method of forming the third coating film 280 having the above-described second configuration is not particularly limited. The third coating film 280 is configured, for example, by serially depositing the respective layers using a method selected from a physical deposition method (e.g. a vacuum deposition method, an ion plating method, and sputtering method), a chemical deposition method (e.g. thermal CVD method, a plasma CVD method, and an optical CVD method), and an ion beam sputtering method. An entire thickness of the third coating layer 280 falls, for example, within a range of 50 nm to 300 nm, preferably within a range of 70 nm to 270m m. In addition, in the example illustrated in FIG. 5, the third coating film 280 has a three layer structure. In the second configuration, the number of layers of the third coating film 280 is not particularly limited. For example, the third coating film 280 may have a repeating structure of a dielectric layer and a metal layer. In this case, the third coating film 280 has a structure of a first dielectric layer, a first metal layer, a second dielectric layer, a second metal layer, a third dielectric layer, and the like, from a side close to the glass plate 210. Particularly, the number of repetitions is preferably two. When the functional layer 283 is configured of silver or a material mainly including a silver alloy and the number of repetitions is two, a functional layer in a lower layer is preferably thicker than a functional layer in an upper layer. Specifically, a ratio of a thickness of the upper layer to the lower layer is preferably 0.4 to 0.8. By setting the ratio within this region, it becomes possible to set a color tone preferable. Moreover, when the upper layer is thicker than the lower layer, it becomes possible to set a color tone more preferable also by setting the thickness of the lower layer to less than 10 nm, and by setting the ratio of thickness of the upper layer to the lower layer to 2.5 or more. (Third configuration example) FIG. 6 schematically depicts an example of a third configuration of a third coating film. As illustrated in FIG. 6, in this configuration, the third coating film 280A includes seven layers, i.e. a first dielectric layer 282A, a first functional layer 283A, a first barrier layer 284A, a second dielectric layer 285A, a second functional layer 286A, a second barrier layer 287A, and a third dielectric layer 288A. Among the layers, for the dielectric layers 282A, 285A, and 288A, and the functional layers 283A and 286A, the description related to the second configuration of the third coating film 280, illustrated in FIG. 5, can be referred. Therefore, detailed description of these layers will be omitted. The first barrier layer 284A and the second barrier layer 287A are arranged upon depositing the second dielectric layer 285A and the third dielectric layer 288A in order to control oxidation of the first functional layer 283A and the second functional layer 286A, respectively. A configuration material of the first barrier layer 284A is not particularly limited as long as the above-described roles are exerted. The first barrier layer 284A may include, for example, titanium, a zinc aluminum alloy, a nickel chromium alloy, or oxides thereof. Particularly, the first barrier layer 284A is preferably configured of a material mainly including titanium, or titanium oxide. The first barrier layer 284A may include a configuration element other than titanium. The configuration element other than titanium includes, for example, niobium, tantalum, zirconium, silicon, tungsten, and molybdenum. One element of these elements or two or more elements of these elements may be included. Titanium, niobium, tantalum, tungsten and molybdenum may be included in the barrier layer as, for example, TiOx (x<2), Nb 20x (x<5), Ta 20x (x<5), ZrOx (x<2), SiO, (x<2), WOx (x<3), MoOz (x<3), or a compound of them. A thickness of the first barrier layer 284A is preferably 1 nm or more. When the thickness of the first barrier layer 284A is 1 nm or more, the first functional layer 283A is prevented from oxidizing effectively. A thickness of the first barrier layer 284A is, for example, 10 nm or less. With such a thickness, a visible light transmittanceTv (%) of the laminated glass can be enhanced. The same applies to the second barrier layer 287A as the first barrier layer 284A. In the example illustrated in FIG. 6, the third coating film 280A has a seven layer structure. In the third configuration, the number of layers of the third coating film 280A is not limited to this. For example, in the third coating film 280A, among the layers illustrated in FIG. 6, a part from the second functional layer 286 to the third dielectric layer 288A may be omitted. Alternatively, the third coating film 280A may include a structure in which a part from the dielectric layer to the barrier layer is repeated three times or more. It is obvious for a person skilled in the art that other various configurations can be assumed. Moreover, the above-described first to third coating films are not limited to be used only in the above-described forms, and can be used by properly changing within a range not deviating from the intent of the present invention. For example, in the above-described second laminated glass, on the fourth surface, the third coating film may be used instead of the second coating film. In the first laminated glass, on the first surface, the third coating film may be used instead of the first coating film.

EXAMPLE Next, practical examples of the present invention will be described. Note that, in the following descriptions, Examples 1 to 5, Examples 11 to 18, Examples 51 to 58, and Examples 60 to 66 are practical examples. Examples 31 to 43 andExample 59 are comparative examples. (Example 1) According to the following method, a laminated glass was manufactured. First, on one surface of the first glass plate, a first film was formed. For the first glass plate, a colored glass having a dimension of 300 mm (vertical) x 300 mm (horizontal) x 6 mm (thickness) (EverGreen

(trademark registered) by Pilkington Group Limited) was used. The configuration of the first film was assumed to have a three layer structure, illustrated in FIG. 2. The undercoat layer was a SiO. layer (target thickness: 55 nm). The conductive oxide layer was a tin oxide layer in which antimony was doped (target thickness: 260 nm). The high refractive index layer was titanium oxide layer (target thickness: 40 nm). These layers were formed by a thermal CVD method. For the deposition of the undercoat layer, a raw material gas, in which a silane (SiH 4 ) gas, a carbon dioxide (CO2

) gas, an ethylene (C 2H 4 ) gas were mixed, was used by attenuating with nitrogen. Mixture ratios (molar ratios) of these raw material gases were about 6 for C0 2 /SiH 4 and about 10 for C 2H 4 /SiH 4 . A temperature of the substrate upon deposition was about 650 °C. For the deposition of the conductive oxide layer, a mixed gas, in which raw materials of mono butyl tin chloride (MBTC), water, and antimony trichloride (SbCl3 ) were evaporated, was used by attenuating with air. Mixture ratios (molar ratios) of these raw material gases were about 1.3 for H2 0/MBTC and about 0.04 for SbCl/MBTC. A temperature of the substrate upon deposition was about 590 °C. For the deposition of the titania layer, a mixed gas, in which raw materials of titanium tetra isopropoxide (TTIP) and MBTC were evaporated, was used by attenuating with nitrogen. A mixture ratio (molar ratio) of these raw material gases was about 0.07 for MBTC/TTIP. A temperature of the substrate upon deposition was about 540 °C. After the deposition, the substrate was cut into pieces with a dimension of 70 mm (vertical) x 100 mm

(horizontal). Next, a second glass plate with a surface, on which a second film was arranged, was prepared. For the second glass plate, a glass plate obtained by forming a second film with an online CVD method on a transparent float glass with a soda lime composition (Clear by Asahi Glass Company, Limited) and afterwards cutting into pieces with a dimension of 70 mm (vertical) x 100 mm (horizontal) x 4 mm (thickness) was used. The second film had a two layer structure with a Siox layer (undercoat layer) and a fluorine added tin oxide layer (conductive oxide layer), illustrated in FIG. 3. A substrate temperature upon depositing the SiOz layer was about 670 °C. The fluorine added tin oxide layer was deposited with the substrate temperature of about 590 °C using a mixed gas, in which raw materials of MBTC, water, acetic acid trifluoride (TFA) were evaporated, by attenuating with air. Mixture ratios (molar ratios) of these raw materials were about 6 for H 20/MBTC and about 0.3 for TFA/MBTC. A thickness of the SiOz layer was 55 nm (target value) and a thickness of a fluorine doped tin oxide layer was 320 nm (target value). Two glass plates thus obtained were laminated via the intermediate film, and thereby a laminated body was configured. At this time, both the glass plates were arranged via the intermediate film so that a surface of the first glass plate, on which the first film was formed, was the first outside and a surface of the second glass plate, on which the second film was formed, was the second outside. The fabrication of a laminated glass can be performed by temporarily bonding two glasses placed one on top of the other and an intermediate film, and bonding by an autoclave. For a material of the intermediate film, typically polyvinyl butyral was used. In addition, ethylene-vinyl acetate copolymer may be used. According to the above processes, the laminated glass (in the following, referred to as a laminated glass according to Example 1) was manufactured. In addition, in the laminated glass according to Example 1, a thickness of the intermediate film was 0.38 mm. (Examples 2 to 5) Using the same method as Example 1, laminated glasses were manufactured. In Examples 2 to 5, for the first glass plate, a different type of glass (and thickness) from Example 1 was used. Moreover, in Examples 3 and 5, the thickness of the second glass plate was changed to 3.2 mm. In Example 5, the Te value was less by 1% than that of Example 4, which was configured of the same glass plate as Example 5 and of the first coating film. However, this variation was within an extent of two occurring factors: a variation in characteristic due to a variation in film thickness occurring in a sample surface, and a variation in measured values of a spectrophotometer. The laminated glasses thus obtained will be referred to as laminated glasses according to Examples 2 to 5, respectively. (Example 11) A laminated glass was manufactured using the same method as Example 1. In Example 11, a first glass was arranged so that a surface of the first glass, on which a first film was formed, was adjacent to an intermediate film (in other words, on an inner side) upon laminating the first glass, the intermediate film and a second glass. The second glass plate was arranged so that a surface, on which a second film was formed, was at the second outside. The above-described configuration corresponds to the configuration of the second laminated glass 200, illustrated in FIG. 4. Then, the first film will be referred to as a third film, here. The laminated glass thus obtained will be referred to as a laminated glass according to Example 11. (Examples 12 to 18) Using the same method as Example 11, laminated glasses were manufactured. In Examples 12 to 18, for the first glass plate and/or the second glass plate, a different type of glass (and thickness) from Example 11 was used. The configuration of the second film and the deposition condition for the second film were the same as the configuration of the second film and the deposition condition for the second film in Example 1. Moreover, in Examples 12 and 14, the thickness of the second glass plate was changed to 3.2 mm. In Example 14, the Te value was less by 1% than that of Example 15, which was configured of the same glass plate as Example 14 and of the first coating film. However, this variation was within an extent of two occurring factors: a variation in characteristic due to a variation in film thickness occurring in a sample surface, and a variation in measured values of a spectrophotometer. The laminated glasses thus obtained will be referred to as laminate glasses according to Examples 12 to 18, respectively. TABLES 1 and 2, in the following, show the configurations of the laminated glasses according to Examples 1 to 5, and Examples 11 to 18 as a whole.

[TABLE 1]

energy transmittance of first glass second second emissivity Examp first glass frst coating fh third coating film tpton l which glass coating of fourth le plate first or third lae fl suac coating film was laminated Te (%) SiOxlayer (55nm)+Sb Clear SiOjlayer 1 EverGreen doped tin oxide layer 22 (4 +F doped 0.14 (6lmm) (260 n)+titania mm) tin oxide layer (0 nm11) Panasap SiOlayer (55n)+Sb Clear SiOxlayer 2 Green(6 dopedtinoxidelayer 25 (4 +Fdoped 0.14 ) 0nm) +titania mm) tin oxide layer (40nm) Panasap iOtayer (55nm) + Sb Clear SiOjlayer 3 Green (6 doped tinoxidelayer 25 (3.2 +F doped 0.14 mm) layer(4 nS mm) tin oxide layer (40 nm) PnspSiOljayer (55m) + bClear SiOxlayer 4 Green (8 dopedtinoxidelayer 21 (4 +F doped 0.14 mm) (260 nm)+titania mm) tin oxide layer (40 nm) SiOklayer (55nm)+Sb Clear SiOxlayer 5 Green(8 doped tin oxide layer 20 (3.2 +F doped 0.14 (260 nm)+titania mm) tin oxide layer (40 nm) SiOxlayer (55nm)+ Clear SiOxlayer EverGreen Sb doped tin oxide 22 (4 SF do 0.14 (6mm) layer (260 nm)+ mm) tin oxide titania layer (40 nm) Panasap SiOjayer(55n)+ Clear SiOjayer 12 Green(6 Sb dopedtinoxide 25 (3.2 +Fdoped 0.14 mm) (0 layerlayer ) mm) tin oxide titama (40nDm)

[TABLE 2]

energy transmittance of first glass second second emissivity Examp first glass on which first or glass cong enurty coating third coating film glass coating of fourth le plate film filmwas plate film surface laminated Te (%) Panasap SiOjlayer (55nm)+Sb doped Clear (4 SiOxlayer 13 Green (6 tin oxide layer (260 rn)+ 25 +F doped 0.14 mm) titania layer (40 nm) mm) tin oxide

Panasap SiOxlayer (55nm)+Sb doped Clear SiOjlayer 14 Green(8 - tin oxide layer(260 nm)+ 20 (3.2 +F doped 0.14 mm) titanialayer (40 nm) mm) tin oxide Panasap SiOxlayer (55nm)+Sb doped C (4 SiOlayer 15 Green (8 - tin oxide layer (260 nim)+ 21 +F doped 0.14 mm) titania layer (40nm) nn) tin oxide SiOxlayer (55nm)+Sb doped EverGre SiOxlayer Clear (4 16 MM) - tin oxide layer (260 nm)+ 47 en(6 +F doped 0.14 titanialayer (40 nm) mm) tin oxide Panasap SiOxlayer Clear (4SiOlayer(55nm)+Sbdoped 17 Rn - tin oxide layer (260 nm)+ 47 Green (6 +F doped 0.14 m titania layer (40 nm) mm) tin oxide Clear (4 SiOlayer (55nm)+Sb doped Panasap SiOxlayer 18 MM( - tin oxide layer (260 nm)+ 47 Green(8 +F doped 0.14 titania layer (40 nm) mm) tin oxide

(Example 31) According to the following method, a laminated glass was manufactured. First, on a surface of the first glass plate a first film was formed. For the first glass plate, a transparent float glass (Clear by Asahi Glass Company, Limited) was used. The first film was set to have a single layer structure of a mixed oxide layer of titania and tin oxide. This layer was depositedusing an online thermal decomposition spray method. Two types of raw materials, oxylen glycol titanate and dimethyl tin diacetate, and a solvent, dimethyl formamide, were mixed, atomized by compressed air, and sprayed on a ribbon of float glass, and thereby an oxide layer was formed. A temperature of

the substrate upon deposition was about 520 °C. A thickness of the mixed oxide layer was 45 nm (target value). After forming the film, the substrate was cut

into pieces with a dimension of 70 mm (vertical) x 100 nm (horizontal) x 6 mm (thickness). Next, the second glass plate with a second film arranged on one surface was prepared. For the second glass plate, a glass plate obtained by forming the second film using an online CVD method on a transparent float glass with a soda lime composition (Clear by Asahi Glass Company, Limited) and afterwards cutting into pieces with a dimension of 70 mm (vertical) x 100 mm (horizontal) x 6 mm (thickness) was used. The configuration and the deposition condition for the second film were the same as the configuration and the deposition condition for the second film in Example 1. Two glass plates thus obtained were laminated via the intermediate film, and thereby a laminated body was configured. At this time, both the glass plates were arranged via the intermediate film so that a surface of the first glass plate, on which the first film was formed, was at the first outside and a surface of the second glass plate, on which the second film was formed, was at the second outside. In the subsequent processes, in the same way as Example 1, both the glass plates were bonded to each other. According to the above-described processes, the laminated glass (in the following, referred to as a laminated glass according to Example 31) was manufactured. (Examples 32 to 35) Laminated glasses were manufactured using the same method as the case of Example 31. In Examples 32 to 35, for the first glass plate, a different type of glass from Example 31 was used. The laminated glasses thus obtained will be referred to as laminated glasses according to Examples 32 to 35, respectively. (Examples 36 and 37) Using the same method as Example 31, a laminated glass was manufactured. In Examples 36 and 37, for the first glass plate, a different type of glass from Example

31 was used. Moreover, the first film was a mixed oxide layer of iron, chromium and cobalt formed using a spray method. The film was deposited using an online thermal decomposition spray method. An acetylacetonate of three types of raw materials, iron, chromium and cobalt was prepared and dissolved in a solvent, dimethyl formamide. The solution thus obtained was atomized by compressed air, and sprayed on a ribbon of float glass, and thereby an oxide layer was formed. A thickness of the oxide layer was 40 nm (target value). The laminated glasses thus obtained will be referred to as laminated glasses according to Examples 36 and 37, respectively. (Example 38) Using the same method as Example 31, a laminated glass was manufactured. In Example 38, the first film had a two layer structure with a SiOz layer and a conductive tin oxide. A target thickness of the SiO, layer was 55 nm. Moreover, the conductive tin oxide was an antimony doped tin oxide layer, and a target thickness was 320 nm. Moreover, in Example 38, the first glass was arranged so that a surface of the first glass, on which a first film was formed, was adjacent to an intermediate film (i.e. on an inner side) upon laminating the first glass, the intermediate film and a second glass. The second glass plate was arranged so that a surface, on which a second film was formed, was at the second outside. The above-described configuration corresponds to the configuration of the second laminated glass 200, as illustrated in FIG. 4. The first film will be referred to as a third film, here. The laminated glass thus obtained will be referred to as a laminated glass according to Example 38. (Examples 39 to 41) Using the same method as Example 38, a laminated glass was manufactured. In Examples 39 to 41, for the first glass plate, a different type of glass from Example 38 was used. The laminated glasses thus obtained will be referred to as laminated glasses according to Examples 39 to 41, respectively. (Example 42) Using the same method as Example 31, a laminated glass was manufactured. In Example 42, the first film of the first glass plate had a two layer structure with a SiOx layer and a conductive tin oxide. A target thickness of the SiOx layer was 55 nm. Moreover, the conductive tin oxide was an antimony doped tin oxide layer, and a target thickness was 320 nm. Afterwards, through the same processes as Example 31, the first glass plate was bonded to the second glass plate in which a second film was arranged. According to the above-described processes, the laminated glass (in the following, referred to as a laminated glass according to Example 42). (Example 43) Using the same method as Example 31, a laminated glass was manufactured. In Example 43, the first film had a three layer structure, in the same way as in Example 1, illustrated in FIG. 2. Afterwards, through the same processes as Example 31, the first glass plate was bonded to the second glass plate in which a second film was arranged.

According to the above-described processes, the laminated glass (in the following, referred to as a laminated glass according to Example 43). TABLES 3 and 4, in the following, show the configurations of the laminated glasses according to Examples 31 to 43 as a whole.

[TABLE 3]

third energy transmittance of second second emissivity Examp first glass first glass plate on which s scond ofifourth le plate Shfilm coating first or third coating glass coating offourth was laminated Te(1) plt film surface Cla(6 mixed film oftitania+ C (6SiOslayer 31 tin oxide (spray - 67 +F doped 0.14 MM) method)(45nm) nm tinoxide Panasap mixed film of titania+ Clear (6 Sijayer 32 Green (6 tin oxide (spray - 31 +F doped 0.14 mm) method)(45nm) mm) tin oxide Panasap mixed film oftitania+ Clear (6 SiOxlayer 33 BlueGreen tin oxide (spray - 25 mm) +F doped 0.14 (6 mm) method)(45nm) tin oxide Panasap mixed film oftitania+ Clear (6 SiOxlayer 34 DarkBlue tin oxide (spray - 34 +F doped 0.14 (6 mm) method)(45nm) tin oxide Panasap mixed film oftitania+ Clear (6 SiOlayer 35 Euro Gray tin oxide (spray -39 F doped 0.14 (6 mm) method)(45nm) tin oxide Panasap mixedoxide ofFe, Co Clear (6 SiOXlayer 36 Green (6 and Cr (spraymethod) - 21 MM) +F doped 0.14 im) (40 nm) tin oxide Panasap mixed oxide ofFe, Co Clear (6 SiOXlayer 37 Dark Blue and Cr (spray method) - 23 +F doped 0.14 (6 mm) (40 nm) nm) tin oxide

[TABLE 4]

energy transmittance ofnfirstcglass second second emissivity Examfist gass first coatingifilm Exfirtrsspl third coating film pae'wih ortn glas otn ascotng ffut ofuh le coating film plate film surface plate was laminated Te (%) 38 Clear (6 SiO layer (55nm)+ Clear (6 SiOjlayer 014 mm) Sb doped tin oxide mm) +F doped._0.14 layer (320 nm) tin oxide Panasap SiOxlayer (55nm)+ Clear (6 SiOlayer 39 Green(6 - Sb doped tin oxide 27 +F doped 0.14 mm) layer (320 nim) tin oxide Panasap SiOxlayer (55nn)+ Clear(6 SiO.layer 40 BlueGreen - Sb doped tin oxide 25 +F doped 0.14 (6 mm) layer (320 nm) nn tin oxide Panasap SiOxlayer (55nm)+ Clear (6 SiOXlayer 41 EuroGray Sb doped tin oxide 28 +F doped 0.14 (6 mm) layer (320 nm) tin oxide Clear (6 SiOlayer (55nm)+ Clear (6 SiOlayer 42 Sb doped tin oxide - 51 +F doped 0.14 mmn) layer (320 nm) nnn) tin oxide SiOxlayer (55nm)+ 43 reen6 Sb doped tin oxide 25 Clear (6 layer (260 nm)+ mm) mnun) titania layer (40 nm)

(Examples 51 to 58) Next, a laminated glass with a third film having a seven layer structure, illustrated in FIG. 6, was manufactured (Examples 51 to 58). Moreover, a laminated glass with a third film having a ten layer structure was manufactured (Example 59). Furthermore, a laminated glass with a third film having an eight layer structure was manufactured (Examples 60 to 63). Among the above-described laminated glasses, the laminated glass with the third film having a seven layer structure (Examples 51 to 54) was manufactured as follows. First, a third film was formed on one surface of the first glass plate. For the first glass plate, a transparent float glass (Clear by Asahi Glass Company, Limited) with a dimension of 70 mm (vertical) x 100 mm (horizontal) x 4 mm (thickness) was used. Respective layers configuring the third film were formed continuously using an inline type sputtering device. The first, second and third dielectric layers were aluminum doped zinc oxide layers (AZO layers). Upon deposition, an aluminum-zinc alloy target to which aluminum of 2 wt% was added was used, and as a discharge gas, carbon dioxide of 100 sccm was introduced. At this time, a deposition pressure was 0.35 Pa. The first and second functional layers were palladium added silver layers (AgPd layers). Upon deposition, a silver-palladium alloy target to which palladium of 1 wt% was added was used, and as a discharge gas, argon of 50 sccmwas introduced. At this time, a deposition pressure was 0.14 Pa. The first and second barrier layers were titanium layers. Upon depositing the titanium layers, a titanium target was used, and as a discharge gas, argon of 100 sccm was introduced. At this time, a deposition pressure was 0.25 Pa. For the second glass plate, a glass plate obtained by forming the second film using an online CVD method on a transparent float glass with a soda lime composition (Clear by Asahi Glass Company, Limited) and afterwards cutting into pieces with a dimension of 70 mm (vertical) x 100 mm (horizontal) x 6 mm (thickness) was used. The configuration and the deposition condition for the second film were the same as the configuration and the deposition condition for the second film in Example 1. Afterwards, by the same process as in the case of Example 31, both glass plates were bonded to each other. According to the above-described processes, the laminated glasses (in the following, referred to as laminated glasses according to Examples 51 to 54) were manufactured. Also in Examples 55 to 58, using the same method, laminated glasses were manufactured. In these examples, the second film formed on the second glass was the same as the second film in Example 1, except that antimony was added to a tin oxide layer instead of fluorine. (Examples 60 to 66)

First, on one surface of the first glass plate, a first film was formed. For the first glass plate, a transparent float glass (Clear by Asahi Glass Company, Limited) with a dimension of 70 mm (vertical) x 100 mm (horizontal) x 6 mm (thickness) was used. The configuration of the first film had a seven layer structure as illustrated in FIG. 6. The respective layers were formed continuously by using an inline type sputtering device. For the first and second dielectric layers (AZO films), aluminum-zinc alloy targets, to which aluminum of 2 wt% was added, were used, and as a discharge gas, carbon dioxide of 100 sccm was introduced. At this time, a deposition pressure was 0.35 Pa. The third dielectric layer (AZO film, SZO film) was a laminated layer of an AZO film, which was deposited by using an aluminum-zinc alloy target to which aluminum of 2 wt% had been added, and introducing carbon dioxide of 100 sccm as a discharge gas, and of an SZO film, which was deposited by using a tin-zinc alloy target including tin of 50 wt% and introducing as discharge gases argon and oxygen of 30 sccm and 70 sccm, respectively. A deposition pressure of the SZO film was 0.50 Pa. For the first and second functional layers (AgPd films), silver-palladium alloy targets to which palladium of 1 wt% had been added were used, and as a discharge gas, argon of 50 sccm was introduced. At this time, a deposition pressure was 0.14 Pa. The first and second barrier layers (Ti films, NiCr films), titanium targets or nickel-chromium alloy targets including nickel of 50 wt% were used, and as a discharge gas, argon of 100 sccm was introduced. At this time, a deposition pressure was 0.25 Pa.

For the second glass plate, a glass plate obtained by forming the second film using an online CVD method on a transparent float glass with a soda lime composition (Clear by Asahi Glass Company, Limited) and afterwards cutting into pieces with a dimension of 70 mm (vertical) x 100 mm (horizontal) x 4 mm (thickness) was used. The configuration and the deposition condition for the second film in Examples 60, 61 and 64 to 66 were the same as the configuration and the deposition condition for the second film in Examples 51 to 54. The configuration and the deposition condition for the second film in Examples 62 and 63 were the same as the configuration and the deposition condition for the second film in Examples 55 to 58. Afterwards, by the same process as in the case of Examples 51 to 58, both glass plates were bonded to each other. According to the above-described processes, the laminated glasses (in the following, referred to as laminated glasses according to Examples 60 to 66) were manufactured. TABLES 5 and 6, in the following, show the configurations of the laminated glasses according to Examples 51 to 66 as a whole.

[TABLE 5]

energy transmittance Exa irst f iof fip st h second second emissivity mple glass coaing thrd coating orthid glass coating of fourth plate filmn coating film pae fll ufc was laminated Te(%) Clear AZO(30nm)+AgPd(12nm)+Ti(3.5nm)+ Clear SiOlayer+ 51 (6 - AZO(96nm)+AgPd(16.5nm)+Ti(6.5nm)+ 21 (6 F doped 0.14 mm) AZO(30nm) mm) tin oxide 52 Clear AZO(30nm)+AgPd(12nm)+Ti(4nm)+ 18 lear Sil + 014 (6 AZO(96nm)+AgPd(16.5nm)+Ti(9nm)+ (6 Fd mm) AZO(30nm) mm) tinoxide Clear AZO(30nm)+AgPd(14nm)+Ti(3.5nm)+ Clear SiOglayer1+ 53 (6 - AZO(98nm)+AgPd(23nm)+Ti(6.5nm)+ 15 (6 F doped 0.14 mm) AZO(30nm) mm) tin oxide Clear AZO(30nm)+AgPd(12nm)+Ti(2nm)+ Clear SiOlayer+ 54 (6 - AZO(96nm)+AgPd(16nm)+Ti(2nm)+ 29 (6 F doped 0.14 mm) AZO(30nm) mm) tin oxide Clear AZO(30nm)+AgPd(14nm)+Ti(2nm)+ Clear SiOxlayer+ (6 - AZO(97nm)+AgPd(16nm)+Ti(4nm)+ 24 (6 Sbdoped 0.25 mi) AZO(28ntm) mm) tin oxide Clear AZO(30nm)+AgPd(13nm)+Ti(3nm)+ Clear SiOxlayer+ 56 (6 - AZO(97nm)+AgPd(16nm)+Ti(6nm)+ 22 (6 Sb doped 0.25 mm) AZO(28nm) mm) tinoxide Clear AZO(30nm)+AgPd(14nm)+Ti(2nm)+ Clear SiOIayer+ 57 (6 - AZO(97nm)+AgPd(24nm)+Ti(4nm)+ 17 (6 Sb doped 0.25 mm) AZO(28nn) mm) tinoxide Clear AZO(30nm)+AgPd(12nm)+Ti(1nm)+ Clear SiOxlayer+ 58 (6 - AZO(97nm)+AgPd(15nm)+Ti(lnm)+ 32 (6 Sb doped 0.25 mm) AZO(28nm) mm) tinoxide Clear AZO(45nm)+AgPd(18nm)+Ti(2.5nm)+ Clear 59 (6 - AZO(76.5nm)+AgPd(1lnm)+Ti(lnm)+ 17 (6 0.84 MM) AZO(48nm)+AgPd(l5nm)+Ti(lnm)+ MM) AZO(27nm)

[TABLE 6]

energy transmittance first first of first glass second second emissivity Exa, plate on which of fourth mp glass coating third coating film frstorhich glass coating plate film coating film plate film surface was laminated Te(%) Clear AZO(25nm)+AgPd(12nm)+ Clear SiOxlayer+ (3 - Ti(3.5nm)+AZO(99nm)+ 23 (6 F doped 0.14 AgPd(14.9nm)+Ti(6.5nm)+ mm) tin oxide AZO(14nm)+SZO(14nm) Clear AZO(25nm)+AgPd(l2nm)+ Clear SiOlayer+ 61 (3 - Ti(3.5nm)+AZO(99nm)+ 20 (6 F doped 0.14 AgPd(17.9nm)+Ti(6.5nm)+ mm) tin oxide AZO(14nm)+SZO(14nm) Clear AZO(29nm)+AgPd(8.4nm)+ Clear SiOxlayer+ 62 (3 - NiCr(3mI)+AZO(91nm)+ 25 (6 Sb doped 0.25 AgPd(l7nm)+NiCr(5nm)+ mm) tin oxide AZO(11nm)+SZO(17.5nm) Clear AZO(29nm)+AgPd(8.4nm)+ Clear SiOlayer+ 63 (3 - NiCr(3nm)+AZO(92nm)+ 25 (6 Sb doped 0.25 AgPd(l7nm)+NiCr(5nm)+ mm) tin oxide MM) ~ AZO(1nm)+SZO(17.5nm) Clear SZO(20nm)+AgPd(15.8nm)+ Clear SiOlayer+ 64 (6 - Ti(3.4nm)+AZO(5nm)+SZO(7lnm)+ 21 (4 F doped 0.18 mm) AZO(5nm)+AgPd(8.5nm)+Ti(1.5nm)+ mm) tin oxide

AZO(6nm)+SZO(l0nm)+TiO 2(1nm) SZO(25nm)+AZO(l6nm)+ Clear AgPd(6.7nm)+Ti(2.2nm)+AZO(6nm)+ Clear SiO layer+ 65 (6 - SZO(67nm)+AZO(6nm)+ 19 (4 F doped 0.18 mm) AgPd(17.6nm)+Ti(3.5nm)+ mm) tin oxide AZO(l0nm)+SZO(11nm) SZO(25nm)+AZO(l8nm)+ Clear AgPd(3.8nm)+Ti(2nm)+AZO(6nm)+ Clear SiOxlayer+ 66 (6 - SZO(65nm)+AZO(6nm)+ 20 (4 F doped 0.18 mm) AgPd(17.5nm)+Ti(3nm)+AZO(6nm)+ mm) tin oxide SZO(15nm)

(Evaluation) Using the respective laminated glasses, manufactured according to the above-described processes, the following evaluation was performed. (Evaluation of optical characteristics) A spectroscopic measurement was performed for the respective laminated glasses using a spectrophotometer U4100 by Hitachi, Ltd., and by a method in conformity with ISO 9050:2003, a visible light reflectance Rvout (%), an energy reflectance Reout, a shielding coefficient SC, and a visible light transmittance Tv (%) were calculated. Note that the above-described measurements were performed by emitting light from the first outside of each laminated glass, i.e. from outside of the first glass plate. Emissivity was measured using Emissometer by Devices and Services Company, and calculated using a conversion formula for measurements results that was previously determined through an infrared spectrometer FT/IR-420 by JASCO Corporation. TABLE 7, in the following, shows a visible light reflectance Rvout (%), an energy reflectance Reout, a shielding coefficient SC, and a visible light transmittanceTv (%), obtained for each laminated glass as a whole.

[TABLE 71

visible light energy shielding visible light Example reflectance reflectance coefficient transmittance Rvout (%) Reout (%) SC Tv (%) 1 25.7 19.3 0.29 31.9 2 26.3 19.4 0.31 33.9 3 27.1 20.7 0.30 33.4 4 26.1 19.3 0.29 31.0 5 29.1 21.8 0.28 31.7 11 8.1 6.2 0.30 29.0 12 8.0 6.0 0.32 31.7 13 10.0 7.1 0.34 37.8 14 8.8 6.0 0.32 34.0 15 9.7 7.0 0.32 37.3 16 11.9 11.1 0.32 35.2 17 12.1 11.3 0.34 37.5 18 11.8 11.1 0.32 34.3 31 36 27 0.56 56.0 32 35 26 0.37 45.0 33 35 25 0.34 39.0 34 34 25 0.33 36.0 35 34 26 0.36 26.0 36 34 27 0.29 27.0 37 34 27 0.26 21.0 38 9 55 0.55 62.0 39 7 40 0.40 51.0 40 7 39 0.39 44.0 41 5 39 0.39 31.0 42 11.84 10.4 0.53 47.9 43 25.6 18.9 0.49 37.0 51 19.2 31.1 0.28 34.8 52 19.5 31.3 0.26 30.5 53 28.2 37.7 0.22 27.1 54 19.3 31.2 0.34 46.1 55 19.4 33.7 0.29 34.9 56 19.4 32.1 0.28 30.8 57 26.8 39.1 0.23 26.9 58 18.9 30.9 0.34 43.4 59 16.5 40.3 0.30 35.6 60 22.5 35.7 0.29 35.7 61 25.7 37.8 0.26 32.7 62 16.4 26.7 0.30 32.1 63 17.1 26.8 0.30 32.1

64 22.7 35.9 0.29 36.6 65 15 24.4 0.29 30.2 66 18.7 22.9 0.31 30.4

FIG. 7 illustrates a graph in which a relation between the visible light transmittance Tv (%) and the shielding coefficient SC obtained for each laminated glass was plotted. Moreover, FIG. 8 illustrates a graph in which a relation between the visible light transmittance Tv (%) and the visible light reflectance Rvout (%) obtained for each laminated glass was plotted. Moreover, FIG. 9 illustrates a graph in which a relation between an energy transmittance Te (%) of the first glass and the shielding coefficient SC obtained for each laminated glass was plotted. Furthermore, FIG. 10 illustrates a graph in which a relation between the energy reflectance Reot (%) and the shielding coefficient SC obtained for each laminated glass was plotted. Note that the results of measurement of the laminated glass according to Examples 31 to 32, 37 to 40, and 42 to 43 cannot be found in FIG. 7. This is because the results of measurement for the examples greatly depart from the range of the horizontal axis and the vertical axis illustrated in FIG. 7. Moreover, the results of measurement of the laminated glass according to Examples 31, 38, 42 and 43 cannot be found in FIGs. 9 and 10. This is because the results of measurement for the examples greatly deviate from the range of the vertical axis illustrated in FIGs. 9 and 10. From FIG. 7, in the case of the laminated glasses according to Examples 1 to 5, 11 to 18, and 51 to 66, it is found that all plotted points are included within the region "A" expressed by the shielding coefficient SC 0.35. Moreover, from FIG. 8, in the case of the laminated glasses according to Examples 1 to 5, 11 to 18 and 51 to 66, it is found that all plotted points are included within the region "B" expressed by the visible light reflectance Rvt 30%. In each case of the laminated glasses according to Examples 31 to 43, it is found that plotted points are not included in both of the regions "A" and "B". Accordingly, it is possible to say that the laminated glasses according to Examples 1 to 5, 11 to 18, and 51 to 66 are provided with an excellent heat shielding property and the feature that a reflection from the first side is significantly controlled. Moreover, it was found that in the laminated glass according to Examples 1 to 5, 11 to 18 and 51 to 66, all plotted points satisfy the relation of visible light transmittance Tv (%) > 26%, and have sufficient transmittance characteristics. From FIG. 9, in the case of the laminated glasses according to Examples 1 to 5, 11 to 18 and 51 to 66, it is found that all plotted points are included in the region "C" indicated by the shielding coefficient SC !

0.35. These plotted points roughly have a tendency such that the shielding coefficient SC increases with the increase of the energy transmittance Te of the first glass. All of these plotted points are included in the region where the energy transmittance of the first glass Te < 50%. When the energy transmittance Te is greater than in this region, the SC value is greater than 0.35. In the case of the laminated glasses according to Examples 31 to 43, plotted points that are not included in the region can be found. The plotted points for Examples 33, 34, 36 and 37 are included in the region where the shielding coefficient

SC 0.35, but are distributed in the region where the visible light reflectance Rvout > 30%, as illustrated in FIG. 8, and degrade design properties due to a noticeable glare. From FIG. 10, in the case of the laminated glasses according to Examples 1 to 5, 11 to 18 and 51 to 66, it is found that all plotted points are included in the region "D" indicated by the shielding coefficient SC 0.35. These plotted points roughly have a tendency that the shielding coefficient SC decreases with the increase of the energy reflectance Reut. All of these plotted points are included in the region where the energy reflectance of the first glass Reout > 4%. When the energy reflectance Reout is less than in this region, the SC value can be expected to be greater than 0.35. The plotted points for Examples 33, 34, 36 and 37 are included in the region where the shielding coefficient SC 0.35, but are distributed in the region where the visible light reflectance Rvout > 30%, as illustrated in FIG. 8, and degrade design properties due to a noticeable glare. (Evaluation of reflection color) Next, using the laminated glasses according to Examples 1 to 5, 11 to 18 and 51 to 66, evaluation of reflection color was implemented. Specifically, the evaluation of reflection color was performed for reflected light when visible light is emitted from the first side of the laminated glass (i.e. the first glass plate side). Incident angles were set to be 5° and 55°. The reflected light was quantified by expressing reflected light obtained in conformity with ISO 9050:2003 with CIE1976L*a*b* chromaticity coordinates. TABLE 8, in the following, shows results of evaluation of reflection color obtained for the laminated glasses according to Example 1 to 5, 11 to 18 and 60 to 66 as a whole.

[TABLE 81

reflection color reflection color Example incident at 5 degrees incident at 55 degrees L* a* b* L* a* b* 1 57.8 -2.6 -2.8 58.0 -4.1 -4.9 2 58.3 -2.9 -2.2 58.2 -6.1 -4.4 3 59.1 -0.8 -3.3 58.4 -5.8 -5.7 4 58.1 -2.9 -2.1 58.1 -6.1 -4.4 5 60.9 -3.3 -4.4 58.3 -5.8 -5.7 11 34.2 -3.6 -2.7 40.6 -6.8 0.0 12 34.0 -3.4 -4.3 40.1 -7.8 -1.7 13 37.8 -4.8 -1.2 40.2 -7.8 -1.9 14 35.5 -6.5 -2.0 38.8 -7.7 -1.4 15 37.3 -5.2 -1.1 38.9 -7.7 -1.5 16 41.0 -3.8 -0.9 43.2 -6.1 -1.7 17 41.4 -3.7 -1.3 43.5 -6.4 -2.0 18 40.9 -3.7 -1.1 43.1 -6.4 -1.9 51 52.2 -19.8 -25.0 47.7 -3.3 -32.4 52 52.7 -20.2 -27.7 47.8 -2.0 -34.9 53 61.4 -29.9 -24.5 54.1 -8.3 -36.6 54 52.0 -19.7 -17.9 48.3 -6.6 -26.0 55 52.4 -19.0 -23.3 48.4 -1.9 -30.0 56 52.4 -19.4 -24.5 48.0 -3.2 -31.6 57 60.1 -26.7 -24.9 53.9 -2.6 -34.7 58 51.3 -18.5 -14.8 48.0 -8.8 -22.8 59 48.9 -11.0 -21.7 50.2 16.6 -20.7 60 55.6 -20.1 -20.6 50.7 -7.8 -29.8 61 58.8 -24.5 -20.9 52.6 -10.9 -32.5 62 48.4 -13.3 -20.8 46.0 -3.2 -25.5 63 49.4 -14.1 -19.9 46.6 -4.6 -25.2 64 55.0 -3.4 -7.0 56.0 2.6 -7.3 65 45.5 -4.1 -16.3 46.5 1.0 -15.9 66 51.7 -5.2 -0.9 52.8 -4.4 -4.4

As indicating in TABLE 8, it was found that for all laminated glasses except for Example 59, the reflection color exists in the third quadrant where both a* and b* are negative values. Moreover, absolute values of a* and b* were sufficiently small. According to the above-described properties, the reflection colors of these laminated glasses exist in the region of light blue color to light green color. With respect to the reflection color of such an area, because any awkward impression to the viewer would be small, rather tending to be of a preferable quality, it is possible to say that the laminated glasses are provided with an excellent design property. In this way, in the case of the laminated glasses according to Examples 1 to 5, 11 to 18 and 51 to 66, it was confirmed that the possibility of degrading a design property of a laminated glass by reflection color is sufficiently low. Particularly, it was found that the laminated glasses according to Examples 64 to 66 have more excellent color tone compared with other configurations. There is concern that because for the laminated glass according to Example 59 the color coordinate a* is a positive value in reflection color for incident light at 550, the reflection color may cause an awkward impression.

INDUSTRIAL APPLICABILITY The laminated glass disclosed in the present application can be preferably applied to a window glass of a building or the like. The present application is based on and claims the benefit of priority of Japanese Priority Applications No. 2015-107729 filed on May 27, 2015 and No. 2015-243501 filed on December 14, 2015, the entire contents of which are hereby incorporated by reference.

REFERENCE SIGNS LIST 100 first laminated glass

101 first outside 102 second outside 110 first glass plate 112 first surface 114 second surface 120 second glass plate 122 third surface 124 fourth surface 130 intermediate film 150 first coating film 152 undercoat layer 153 conductive oxide layer 154 high refractive index layer 170 second coating film 172 undercoat layer 173 conductive oxide layer 200 second laminated glass 201 first outside 202 second outside 210 first glass plate 212 first surface 214 second surface 220 second glass plate 222 third surface 224 fourth surface 230 intermediate film 270 second coating film 280,280A third coating film 282,282A first dielectric layer 283 functional layer 283A first functional layer 284 second dielectric layer 284A first barrier layer

285A second dielectric layer 286A second functional layer 287A second barrier layer 288A third dielectric layer

Claims (16)

1. WHAT IS CLAIMED IS:

   [Claim 1] A laminated glass comprising a first glass plate; and a second glass plate that is bonded to the first glass plate via an intermediate film, wherein the first glass plate has a first surface and a second surface opposite to each other, the second glass plate has a third surface and a fourth surface opposite to each other, the first surface is arranged farther from the intermediate film than the second surface, and fourth surface is arranged farther from the intermediate film than the third surface, wherein a first coating film is arranged on the first surface or the second surface, wherein a second coating film is arranged on the fourth surface, wherein, from the first glass plate of the laminated glass side, a visible light reflectance represented as Rvout (%) that is measured in conformity with ISO 9050:2003, a solar radiation heat reception rate represented as a g-value, a visible light transmittance represented as Tv (%), and a shielding coefficient represented as SC that is obtained by formula (1) SC g-value / 0.88 (formula (1))

   satisfy Rvout 30%, Tv > 26%, and SC 0.35, and wherein when reflected light obtained, in conformity with ISO 9050:2003, for light incident with angles of 5 degrees and 55 degrees from the first glass plate side is quantified by expressing with CIE1976L*a*b* chromaticity coordinates, values of a* and b* are both 3 or less.
2. [Claim 2] The laminated glass according to claim 1, wherein the shielding coefficient, SC, satisfies SC 0. 33.
3. [Claim 3] The laminated glass according to claim or 2, wherein the values of the chromaticity coordinates a* and b* satisfy a* > -10 and b* > -20.
4. [Claim 4] The laminated glass according to any one of claims 1 to 3, wherein an energy transmittance, Te, measured in conformity with ISO 9050:2003 for laminated layers of the first glass plate and the first coating film is 50% or less, and the second coating film is a film with an emissivity of 0.4 or less.
5. [Claim 5] The laminated glass according to any oneof claims 1 to 4, wherein an energy reflectance, Re,t, measured in conformity with ISO 9050:2003 from the first glass plate of the laminated glass side satisfies 4% Reot.
6. [Claim 6] The laminated glass accordingto any oneof claims 1 to 5, wherein after a perspiration resistance test in conformity with ISO 12870 for three days, a number of defects within a range of 1 mm x 1 mm measured by observing a surface of the second coating film with a microscope of 50 times magnification is 50 or less.
7. [Claim 7] The laminated glass according to any one of claims 1 to 6, wherein at least any one of the first coating film and the second coating film includes a conductive tin oxide.
8. [Claim 8] The laminated glass according to any one of claims 1 to 7, wherein at least any one of the first coating film and the second coating film includes a nitride.
9. [Claim 9] The laminated glass according to any one of claims 1 to 8, wherein at least any one of the first coating film and the second coating film includes silver.
10. [Claim 10] The laminated glass according to claim 7, wherein the conductive tin oxide includes tin oxide doped with antimony (Sb).
11. [Claim 11] The laminated glass according to claim 7, wherein the conductive tin oxide includes tin oxide doped with fluorine (F).
12. [Claim 12] The laminated glass according to any one of claims 7, 10 and 11, wherein an undercoat is arranged between the conductive tin oxide and the first glass plate or between the conductive tin oxide and the second glass plate.
13. [Claim 13] The laminated glass according to claim 12, wherein the undercoat is a multi-layered film.
14. [Claim 14] The laminated glass according to any one of claims 1 to 13, wherein the first coating film is arranged on the second surface, wherein the first coating film includes two layers mainly including silver or a silver alloy, and wherein the layer of the two layers that is closer to the second surface is thicker than the other layer.
15. [Claim 15] The laminated glass according to claim 14, wherein a ratio of a thickness of the other layer to the thickness of the layer closer to the second surface falls within a range of 0.4 to 0.8.
16. [Claim 16] The laminated glass according to any one of claims 1 to 13, wherein the first coating is arranged on the second surface, wherein the first coating film includes two layers mainly including silver or a silver alloy, and wherein a thickness of the layer of the two layers closer to the second surface is less than 10 nm, and a ratio of a thickness of the other layer to the thickness of the layer closer to the second surface is 2.5 or more.

    AGC Inc. Patent Attorneys for the Applicant/Nominated Person SPRUSON & FERGUSON