WO2016189992A1 - 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_out≤30%, Tv>26%, and SC≤0.35, where Rv_out (%) is the visible-light reflectance, the g-value is the solar heat gain coefficient, Tv (%) is the visible-light transmittance, and the value SC represented by SC=g value/0.88 is a shading coefficient. When reflected light beams obtained from light beams incident from the first glass plate side at 5 and 55 degrees are expressed in the CIE 1976 L*a*b* chromaticity coordinates, a^* and b^* are both 3 or less.

Description

Laminated glass

The present invention relates to laminated glass.

Due to the recent increase in energy conservation awareness, there are an increasing number of cases where double glazing is applied to building window glass. Multi-layer glass is constructed by laminating two glass plates to each other via an air layer. In the double-glazed glass, heat transfer from one glass plate to the other glass plate is suppressed due to the presence of the internal air layer, so that heat insulation and heat insulation performance can be improved.

JP2015-511570A

However, in general, the double-glazed glass has a problem that it is difficult to reduce the thickness due to its structure. For example, in a normal double-glazed glass, if the thickness of the air layer is reduced, sufficient heat shielding and heat insulation performance cannot be exhibited. Therefore, the air layer has a thickness of at least 10 to 15 mm. Due to such thickness restrictions, it may be difficult to apply the double-glazed glass depending on the application.

Therefore, in order to meet such a demand, it is conceivable to apply a laminated glass instead of the multilayer glass. This is because the laminated glass is composed of two glass plates and an intermediate film between the two glass plates (that is, does not have a thick air layer) and can easily form a thinner structure.

For example, Patent Document 1 discloses a laminated glass having a awning function and a heat insulating function. However, with laminated glass, it is difficult to achieve both sufficient heat insulation / heat insulation performance compared to double-glazed glass and overcoming problems due to appearance such as reduced transmittance and glare due to reflection. Currently, the application to the window glass is not progressing.

The present invention has been made in view of such a background, and an object of the present invention is to provide a laminated glass having both heat insulation and heat shielding performance and appearance performance.

The laminated glass of one embodiment of the present invention is a laminated glass configured by joining the first glass plate and the second glass plate via an intermediate film,
The first glass plate has a first surface and a second surface that face each other, and the second glass plate has a third surface and a fourth surface that face each other, and The surface is disposed on the side farther from the intermediate film than the second surface, the fourth surface is disposed on the side farther from the intermediate film than the third surface,
A first coating film is provided on the first surface or the second surface,
A second coating film is provided on the fourth surface,
From the side of the first glass plate of the laminated glass, the visible light reflectance measured in accordance with ISO 9050: 2003 is Rv _out (%), the solar heat gain is g value, and the visible light transmittance is When Tv (%) and the value represented by the following formula (1) are the shielding coefficient SC,

SC = g value / 0.88 (1) Formula
Rv _out ≦ 30%, Tv> 26% and SC ≦ 0.35,
A numerical value is obtained by expressing reflected light obtained in accordance with ISO 9050: 2003 with CIE 1976 L ^* a ^* b ^* chromaticity coordinates with respect to light incident at an angle of 5 degrees and 55 degrees from the side of the first glass plate. When laminated, a laminated glass having a ^* b ^* of 3 or less is provided.

Moreover, the laminated glass of another form of this invention is a laminated glass comprised by joining a 1st glass plate and a 2nd glass plate through an intermediate film, Comprising: The said 1st glass plate is , Having a first surface and a second surface facing each other, the second glass plate having a third surface and a fourth surface facing each other, the first surface being the second surface The fourth surface is disposed on the side farther from the intermediate film than the third surface, the fourth surface is disposed on the side farther from the intermediate film than the third surface, and the first coating film is disposed on the second surface. The fourth surface is provided with a second coating film, and the first coating film includes two layers mainly composed of silver or a silver alloy, and the second surface thereof The layer closer to is characterized in that it is thicker than the other layer.

Furthermore, the laminated glass of another embodiment of the present invention is a laminated glass configured by joining a first glass plate and a second glass plate via an intermediate film, and the first glass plate is , Having a first surface and a second surface facing each other, the second glass plate having a third surface and a fourth surface facing each other, the first surface being the second surface The fourth surface is disposed on the side farther from the intermediate film than the third surface, the fourth surface is disposed on the side farther from the intermediate film than the third surface, and the first coating film is disposed on the second surface. The fourth surface is provided with a second coating film, and the first coating film includes two layers mainly composed of silver or a silver alloy, and the second surface thereof The thickness of the layer closer to is less than 10 nm and closer to the second surface Wherein the thickness ratio of said relative thickness of the layers other layer is 2.5 or more.

In the present invention, a laminated glass having both heat insulation / heat shielding performance and appearance performance can be provided.

It is the figure which showed the schematic cross section of the laminated glass by one Embodiment of this invention. It is the figure which showed schematically an example of the structure of the 1st coating film in the laminated glass by one Embodiment of this invention. It is the figure which showed schematically an example of the structure of the 2nd coating film in the laminated glass by one Embodiment of this invention. It is the figure which showed the schematic cross section of another laminated glass by one Embodiment of this invention. It is the figure which showed schematically an example of the structure of the 3rd coating film in another laminated glass by one Embodiment of this invention. It is the figure which showed schematically another example of the structure of the 3rd coating film in another laminated glass by one Embodiment of this invention. It is the graph which plotted the relationship between the visible light transmittance | permeability Tv (%) and shielding factor SC which were obtained in each laminated glass. It is a graph plotting the relationship between the visible light transmittance Tv obtained in the laminated glass (%) visible light reflectance Rv _{out (%).} It is the graph which plotted the relationship between energy transmittance Te (%) of the 1st glass, and shielding coefficient SC obtained in each laminated glass. It is the graph which plotted the relationship between energy reflectivity _Reout (%) and shielding coefficient SC obtained in each laminated glass.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

(Laminated glass according to one embodiment of the present invention)
First, with reference to FIG. 1, the laminated glass by one Embodiment of this invention is demonstrated.

FIG. 1 is a schematic cross-sectional view of a laminated glass (hereinafter referred to as “first laminated glass”) according to an embodiment of the present invention.

As shown in FIG. 1, the first laminated glass 100 includes a first glass plate 110, a second glass plate 120, and an intermediate film 130 disposed between both glass plates 110 and 120.

The first glass plate 110 has a first surface 112 and a second surface 114 facing each other. The second glass plate 120 has a third surface 122 and a fourth surface 124 that face each other.

The intermediate film 130 is disposed between the second surface 114 and the third surface 122 in order to join the first glass plate 110 and the second glass plate 120. Accordingly, the first surface 112 of the first glass plate 110 is closer to the first “outside” 101 of the first laminated glass 100 than the second surface 114, and the second surface of the second glass plate 120. The fourth surface 124 is arranged closer to the second “outside” 102 of the first laminated glass 100 compared to the third surface 122.

The term “outside” means that the term “outdoor side” / “indoor side” used when the first laminated glass 100 is actually installed at an installation location such as a building, It is necessary to keep in mind that it is different. That is, in the usage environment of the first laminated glass 100, the first outer side 101 of the first laminated glass 100 corresponds to the “outdoor side”, and the second outer side 102 of the first laminated glass 100 is “ Corresponds to "indoor side".

The first coating film 150 is provided on the first surface 112 of the first glass plate 110. In addition, a second coating film 170 is provided on the fourth surface 124 of the second glass plate 120. The first coating film 150 and the second coating film 170 may be a single layer film or a laminated film.

It is possible to impart antifouling performance by providing the first coating film on the first surface of the first glass plate. In order to provide suitable antifouling performance, the arithmetic average roughness Ra of the surface of the first coating film is 1 nm or more and 13 nm or less, and the Peak-valley value (PV value) of the surface of the first coating film is It is preferable that ratio (PV / Ra) with Ra is 15 or less.

Further, by providing the second coating film on the fourth surface of the second glass plate, it becomes possible to more effectively provide heat insulation / heat shielding performance. The second coating film preferably has durability. For example, in the second coating film, the number of defects in the range of 1 mm × 1 mm measured by observing the surface of the second coating film with a microscope (50 times) after a 3-day sweat resistance test according to ISO12870 is 50 or less.

Due to the presence of the coating films 150 and 170, the first laminated glass 100 has a visible light reflectance measured in accordance with ISO 9050: 2003 from the first outer side 101, that is, the first glass plate 110 side. Is Rv _out (%), the solar heat acquisition rate is g value, and the value divided by 0.88 is represented by the following formula (1), and the shielding coefficient SC is:

SC = g value / 0.88 (1) Formula
The characteristics of Rv _out ≦ 30% and SC ≦ 0.35 are obtained.

Here, the solar heat acquisition rate g value is absorbed in the inside of the laminated glass with the heat (transmitted heat) directly transmitted to the second outside with respect to the total solar heat incident from one outside of the laminated glass, and thereafter It is expressed as a ratio of the sum total with the heat released to the second outside. Further, the shielding coefficient SC is an index representing the heat shielding performance of the laminated glass. It can be said that the smaller the value, the higher the heat shielding performance of the laminated glass.

In the first laminated glass 100, the shielding coefficient SC is 0.35 or less, which is sufficiently small, and therefore sufficient heat shielding characteristics can be obtained. The SC is more preferably 0.33 or less.

Further, the first laminated glass 100, since the visible light reflectance Rv _out is suppressed to 30% or less, when the first laminated glass 100 viewed from the first outer 101, significant glare occurs It is difficult to significantly impair the design properties.

Due to such characteristics, the first laminated glass 100 can exhibit good heat shielding properties without impairing the design properties when applied to, for example, a building window.

In the laminated glass described in this specification, it is difficult to determine which outer side is the first outer side 101 or the second outer side 102 only from the appearance. Therefore, actually, if the target laminated glass has the above-described configuration, and the visible light reflectance Rv _out (%) and the shielding coefficient SC measured from the outside of either one satisfy the above conditions, Such a laminated glass can be said to be a laminated glass according to an embodiment of the present invention.

(Each member constituting laminated glass)
Next, each member which comprises the 1st laminated glass 100 which has the above characteristics is demonstrated in detail. In the following description, the reference numerals shown in FIG. 1 are used to represent each member for the sake of clarity.

(Glass plate 110, 120)
The first glass plate 110 may be made of, for example, soda lime glass, borosilicate glass, alkali-free glass, aluminosilicate glass, or the like.

Further, the glass plate 110 may be transparent or colored. The color of the glass plate 110 is not particularly limited, but the glass plate 110 may be, for example, green or blue.

The same can be said for the second glass plate 120 as for the first glass plate 110. Note that the second glass plate 120 may have a different composition and / or a different color from the first glass plate 110.

The thickness of the glass plates 110 and 120 is not particularly limited, but the thickness is, for example, in the range of 2 mm to 12 mm. Note that the first glass plate 110 may have a thickness different from that of the second glass plate 120. The glass plates 110 and 120 may be tempered glass, particularly chemically tempered glass, and the strength of the laminated glass can be improved by using the chemically tempered glass. Can be suitably used.

(Intermediate film 130)
In the first laminated glass 100, any conventionally used intermediate film can be used as the intermediate film 130 as long as the above characteristics are satisfied.

A typical intermediate film 130 has a thermoplastic resin and a plasticizer.

Examples of the thermoplastic resin include polyvinyl butyral resin, polyvinyl acetal resin, ethylene-vinyl acetate copolymer resin, ethylene-acrylic copolymer resin, polyurethane resin, and polyvinyl alcohol resin. However, other thermoplastic resins may be used.

Examples of the plasticizer include organic ester plasticizers such as monobasic organic acid esters and polybasic organic acid esters, and phosphoric acid plasticizers such as organic phosphoric acid plasticizers and organic phosphorous acid plasticizers. The However, other plasticizers may be used.

The thickness of the intermediate film 130 is not particularly limited, but is, for example, in the range of 0.1 mm to 3 mm.

(About coating films 150 and 170)
The coating films 150 and 170 are configured to obtain the visible light reflectance Rv _out (%) and the shielding coefficient SC as described above when applied to the glass plates 110 and 120, respectively.

Hereinafter, with reference to FIG. 2 and FIG. 3, a configuration example of each 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 shows an example of the configuration of the coating film 150.

As shown in FIG. 2, in this configuration, the coating film 150 includes three layers of an undercoat layer 152, a conductive oxide layer 153, and a high refractive index layer 154. Here, the high refractive index layer means a layer having a refractive index larger than 2.

The undercoat layer 152 has a role of suppressing diffusion of predetermined elements between the first glass plate 110 and the conductive oxide layer 153. The undercoat layer 152 is made of, for example, silicon oxide (SiO _x ) that is a material mainly composed of silica. Here, in the present application, “the layer mainly composed of the material A” means that the material A is contained in an amount of 50% by mass or more in the target layer.

The thickness of the undercoat layer 152 is, for example, in the range of 10 nm to 100 nm.

Note that the undercoat layer 152 need not be a single layer, and may be composed of a plurality of layers. By making the undercoat layer into a multilayer, it becomes possible to obtain an effect of improving the alkali barrier performance and facilitating the adjustment of the reflection color tone, which is preferable from the viewpoint of improving the good appearance performance and durability.

The conductive oxide layer 153 is made of, for example, a material mainly composed of conductive tin oxide. The conductive oxide layer 153 may be made of, for example, tin oxide doped with antimony and / or fluorine. Here, the conductivity means a film having an emissivity of 0.4 or less.

The thickness of the conductive oxide layer 153 is, for example, in the range of 50 nm to 500 nm.

The high refractive index layer 154 has a role of adjusting the reflection characteristics of light incident on the coating film 150.

The thickness of the high refractive index layer 154 is, for example, in the range of 10 nm to 70 nm.

In the configuration example shown in FIG. 2, the undercoat layer 152 and the high refractive index layer 154 are not essential components and may be omitted. Further, the first coating film 150 has an interface between the layers 152, 153, and 154 or an upper portion of the high refractive index layer 154 as long as the above-mentioned visible light reflectance Rv _out (%) and the shielding coefficient SC can be obtained. In addition, another layer may be provided.

The method for forming the first coating film 150 having such a configuration is not particularly limited. The first coating film 150 is formed by, for example, physical vapor deposition (for example, vacuum vapor deposition, ion plating, and sputtering), chemical vapor deposition (for example, thermal CVD, plasma CVD, and photo CVD). ) And a method selected from an ion beam sputtering method and the like.

The total thickness of the first coating film 150 is, for example, in the range of 70 nm to 670 nm, and preferably in the range of 100 nm to 500 nm.

In addition, it is preferable that the energy transmittance | permeability Te obtained based on ISO9050: 2003 of lamination | stacking of a 1st glass plate and a 1st coating film is 50% or less.

(Configuration example of second coating film 170)
FIG. 3 schematically shows an example of the configuration of the second coating film 170.

As shown in FIG. 3, in this configuration, the second coating film 170 is composed of two layers, an undercoat layer 172 and a conductive oxide layer 173.

The undercoat layer 172 has a role of suppressing diffusion of predetermined elements between the second glass plate 120 and the conductive oxide layer 173. The undercoat layer 172 is made of, for example, silicon oxide (SiO _x ) that is a material mainly composed of silica.

The thickness of the undercoat layer 172 is, for example, in the range of 10 nm to 100 nm.

The conductive oxide layer 173 is made of, for example, a material mainly composed of conductive tin oxide. The conductive oxide layer 173 may be made of, for example, tin oxide doped with antimony and / or fluorine. In the case where the conductive oxide layer is tin oxide doped with antimony, the transmission color tone is unlikely to become yellow, and thus it is particularly preferable in order to obtain good appearance performance. In addition, in the case where the conductive oxide layer is tin oxide doped with fluorine, the durability of the film is high, and therefore, it is particularly preferable for applications where higher durability is required.

The thickness of the conductive oxide layer 173 is, for example, in the range of 50 nm to 500 nm.

In the configuration example shown in FIG. 3, the undercoat layer 172 is not an essential configuration and may be omitted. The second coating film 170 may have another layer on the interface between the layers 172 and 173 or on the conductive oxide layer 173 as long as the above-described shielding coefficient SC is obtained.

The method for forming the second coating film 170 having such a configuration is not particularly limited. The second coating film 170 is formed by, for example, physical vapor deposition (for example, vacuum vapor deposition, ion plating, and sputtering), chemical vapor deposition (for example, thermal CVD, plasma CVD, and photo CVD). ) And a method selected from an ion beam sputtering method and the like.

For example, the second coating film 170 may be formed by an on-line CVD method.

Here, “on-line (film formation method)” means a method of forming a film on the surface of the glass during the glass manufacturing process. More specifically, when glass is manufactured, glass ribbon is moved on the molten tin bath and then slowly cooled to manufacture glass continuously. In the method), a film is formed on the upper surface of the glass ribbon during the movement of the glass ribbon. That is, in the “on-line (film forming method)”, the glass manufacturing process and the film forming process are continuously performed.

The total thickness of the second coating film 170 is, for example, in the range of 60 nm to 600 nm, and preferably in the range of 100 nm to 500 nm.

The second coating film is preferably a film having 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)
The first laminated glass 100 is a method based on ISO 9050: 2003, and when the visible light transmittance measured from the first side 101 is Tv (%),

Tv (%)> 26%

Meet.

The first laminated glass 100 having such a visible light transmittance Tv (%) can obtain sufficient lighting when applied to a window glass of a building.

Particularly, the visible light transmittance Tv (%) is more than 28%, preferably more than 30%. From the viewpoint of antiglare properties, the visible light transmittance Tv (%) is preferably 60% or less.

(Reflective color)
The first laminated glass 100 is digitized by expressing reflected light of 5 degrees and 55 degrees incident obtained from the first side 101 according to ISO 9050: 2003 in CIE 1976 L ^* a ^* b ^* chromaticity coordinates. When

a ^* <3 and b ^* <3

Meet.

In general, from the aesthetic point of view, the reflected color is preferably light blue to light green, and red to yellow tends to be avoided. In the 1st laminated glass 100, a ^* and b ^* are in the above-mentioned range, it can suppress that a reflective color turns into red type or yellow type, and can provide the reflective color excellent in the design property. it can.

In particular, at least one of a ^* or b ^*
a ^* >-30, b ^* >-30

It is more preferable that In this case, the obtained reflection color is a light blue to light green region, and the design is further improved. Among the,

a ^* >-10 and b ^* >-20

By adjusting to satisfy both, it is preferable because it can be adjusted to a color that is easy to harmonize with the outer wall of the building.

(Energy reflectivity)
The first laminated glass 100 has a visible light reflectance measured from the first side 101 according to ISO 9050: 2003 as Rv _out (%), a solar heat gain as a g value, and the following (1 ) When the value represented by the equation is the shielding coefficient SC,

SC = g value / 0.88 (1) Formula
The characteristics of Rv _out ≦ 30% and SC ≦ 0.35 are obtained.

Generally, in order to lower the SC value, it is effective to both lower the energy transmittance Te and increase the energy reflectivity Re _out . In particular, when Te of the lamination of the first glass plate and the first coating film is 50% or less and the second coating film is a film having an emissivity of 0.4 or less, SC ≦ 0.35 is satisfied. can get.

Further, in particular, when the energy reflectance from the first glass plate side of the first laminated glass 100 is 4% ≦ Re _out , SC ≦ 0.35 is obtained. Note that a configuration that _satisfies 15% ≦ Re _out is more preferable because it is easy to adjust SC ≦ 0.33. The energy reflectance Re _out is more preferably 15% or more.

As described above, by simultaneously satisfying the shielding coefficient SC, the visible light reflectance Rv _out , the visible light transmittance Tv, and the reflection colors a ^* and b ^* , it is particularly possible to achieve both heat insulation and heat shielding performance and appearance performance. It can be called glass.

(Another laminated glass according to an embodiment of the present invention)
Next, with reference to FIG. 4, the laminated glass by another embodiment of this invention is demonstrated.

FIG. 4 shows a schematic cross-sectional view of a laminated glass (hereinafter referred to as “second laminated glass”) according to another embodiment of the present invention.

As shown in FIG. 4, the second laminated glass 200 includes a first glass plate 210, a second glass plate 220, and an intermediate film 230 disposed between both glass plates 210 and 220.

The first glass plate 210 has a first surface 212 and a second surface 214 that face each other. The second glass plate 220 has a third surface 222 and a fourth surface 224 that face each other.

The first glass plate 210 and the second glass plate 220 are bonded to each other through the intermediate film 230. The first surface 212 of the first glass plate 210 is closer to the first “outside” 201 of the second laminated glass 200 and the fourth surface of the second glass plate 220 than the second surface 214. The surface 224 is positioned closer to the second “outside” 202 of the second laminated glass 200 compared to the third surface 222.

The second coating film 270 is installed on the fourth surface 224 of the second glass plate 220.

Here, in the second laminated glass 200, unlike the first laminated glass 100 described above, a coating film (hereinafter referred to as “third coating film”) is formed on the second surface 214 of the first glass plate 210. 280) is installed. The second coating film 270 and the third coating film 280 may be a single layer film or a laminated film. By providing the coating film on the second surface of the first glass plate, it is preferable because haze can be suppressed. In addition, since a coating film is provided on the second surface 214 of the first glass plate 210, even a film that is not highly durable can be suitably used. In particular, a silver film can be suitably used.

Due to the presence of these coating films 270 and 280, in the second laminated glass 200, the visible light reflectance measured in accordance with ISO 9050: 2003 from the first outer side 201, that is, the first glass plate 210 side. Is Rv _out (%), the solar heat gain is g value, and the value expressed by the above equation (1) is the shielding coefficient SC, Rv _out ≦ 30%, SC ≦ 0.35 The characteristic that there is.

Generally, in order to lower the SC value, it is effective to both lower the energy transmittance Te and increase the energy reflectivity Re _out . In particular, when the Te of the lamination of the first glass plate and the first coating film is 50% or less and the second coating film is a film having an emissivity of 0.4 or less, SC ≦ 0.35, Furthermore, SC ≦ 0.33 is easily obtained.

In particular, when the energy reflectance from the first glass plate side of the first laminated glass 200 is 4% ≦ Re _out , SC ≦ 0.35, and further SC ≦ 0.33. It is easy to obtain.

Due to such a feature, the second laminated glass 200 can obtain an effect that a good heat shielding property can be obtained without impairing the design property when applied to, for example, a building window.

In addition, the description shown regarding each member of the above-mentioned 1st laminated glass 100 can be referred for members other than the 3rd coating film 280 among each member which comprises the 2nd laminated glass 200. FIG. Therefore, several configuration examples of the third coating film 280 of the second laminated glass 200 will be described below.

(Configuration example of 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 as shown in FIG. Since the first configuration is clear from the description regarding the first coating film 150 described above, the description is omitted here.

(Second configuration example)
FIG. 5 schematically shows an example of the second configuration of the third coating film 280.

As shown in FIG. 5, in this configuration, the third coating film 280 is composed of three layers of a first dielectric layer 282, a functional layer 283, and a second dielectric layer 284.

The first dielectric layer 282 is made of a dielectric containing a metal oxide, nitride, and / or oxynitride. Examples of the metal include zinc, tin, titanium, silicon, aluminum, chromium, nickel, niobium, and alloys thereof.

Note that the dielectric material forming the first dielectric layer 282 may be doped with an additive material. The additive material may be, for example, an oxide, nitride, and / or oxynitride such as tin, aluminum, chromium, titanium, silicon, boron, magnesium, and gallium.

In particular, the first dielectric layer 282 is preferably composed of a material mainly composed of zinc oxide or a material mainly composed of silicon nitride. In this case, the first dielectric layer 282 may further include at least one oxide selected from tin, aluminum, chromium, titanium, silicon, boron, magnesium, and gallium.

The thickness of the first dielectric layer 282 is, for example, in the range of 10 nm to 80 nm.

Note that the first dielectric layer 282 does not have to be a single layer, and may be composed of a plurality of layers.

The functional layer 283 includes a material mainly composed of silver or a silver alloy, or a nitride of at least one metal of niobium, tantalum, molybdenum, and zirconium. When the functional layer 283 is made of a silver alloy, the functional layer 283 may include silver and at least one metal selected from palladium, gold, chromium, cobalt, and nickel. These metals may be contained at a ratio of 0.1% by mass or more with respect to the entire functional layer 283.

The thickness of the functional layer 283 is, for example, in the range of 7 nm to 30 nm, and preferably in the range of 10 nm to 25 nm.

For the second dielectric layer 284, the above-described description of the first dielectric layer 282 can be referred to. The second dielectric layer 284 may be the same material as the first dielectric layer 282 or a different material.

The thickness of the second dielectric layer 284 is, for example, in the range of 10 nm to 150 nm, and preferably in the range of 20 nm to 130 nm.

Note that the second dielectric layer 284 does not have to be a single layer, and may be composed of a plurality of layers.

The method for forming the third coating film 280 having such a second configuration is not particularly limited. The third coating film 280 is formed by, for example, physical vapor deposition (for example, vacuum vapor deposition, ion plating, and sputtering), chemical vapor deposition (for example, thermal CVD, plasma CVD, and photo CVD). ) And a method selected from an ion beam sputtering method and the like.

The total thickness of the third coating film 280 is, for example, in the range of 50 nm to 300 nm, and preferably in the range of 70 nm to 270 nm.

In the example shown in FIG. 5, the third coating film 280 has a three-layer structure. However, 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 is formed from the side close to the glass plate 210 from the first dielectric layer, the first metal layer, the second dielectric layer, the second metal layer, and the third dielectric. It has a layer ... structure. In particular, the number of repetitions is preferably 2. Note that when the functional layer 283 is a material mainly composed of silver or a silver alloy and the number of repetitions is 2, it is more preferable that the lower functional layer is thicker than the upper functional layer. Specifically, the ratio of the upper layer thickness to the lower layer thickness is preferably 0.4 to 0.8. By setting this range, the color tone can be set more preferably. Further, when the upper layer is thicker, the color tone can be preferably set by setting the thickness of the lower layer to less than 10 nm and setting the ratio of the upper layer thickness to the lower layer thickness to 2.5 or more.

(Third configuration example)
FIG. 6 schematically shows an example of the third configuration of the third coating film.

As shown in FIG. 6, in this configuration, the third coating film 280A includes a first dielectric layer 282A, a first functional layer 283A, a first barrier layer 284A, a second dielectric layer 285A, Two functional layers 286A, a second barrier layer 287A, and a third dielectric layer 288A.

Among these, 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 as shown in FIG. 5 can be referred to. Therefore, details of these layers are omitted.

The first barrier layer 284A and the second barrier layer 287A are formed in the first functional layer 283A and the second function layer 285A, respectively, when the second dielectric layer 285A and the third dielectric layer 288A are formed. Provided to suppress oxidation of layer 286A.

The constituent material of the first barrier layer 284A is not particularly limited as long as it can exhibit the above role. The first barrier layer 284A may include, for example, titanium, a zinc aluminum alloy, a nickel chromium alloy, or an oxide thereof. In particular, the first barrier layer 284A is preferably made of a material mainly containing titanium or titanium oxide.

The first barrier layer 284A can contain a constituent element other than titanium. Examples of constituent elements other than titanium include niobium, tantalum, zirconium, silicon, tungsten, and molybdenum, and these may be used alone or in combination of two or more. Titanium, niobium, tantalum, tungsten, and molybdenum are included in the barrier layer, for example, TiO _x (x <2), Nb ₂ O _x (x <5), Ta ₂ O _x (x <5), ZrO _x (x <2), SiO _x (x <2), WO _x (x <3), MoO _x (x <3), or a composite thereof.

The thickness of the first barrier layer 284A is preferably 1 nm or more. By setting the thickness of the first barrier layer 284A to 1 nm or more, oxidation of the first functional layer 283A can be effectively suppressed.

The thickness of the first barrier layer 284A is, for example, 10 nm or less. With such a thickness, the visible light transmittance Tv (%) of the laminated glass can be increased.

The same can be said for the second barrier layer 287A as for the first barrier layer 284A.

In the example shown in FIG. 6, the third coating film 280A has a seven-layer structure. However, 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, portions from the second functional layer 286 to the third dielectric layer 288A in the layers shown in FIG. 6 may be omitted. Alternatively, the third coating film 280A may have a structure in which portions from the dielectric layer to the barrier layer are repeated three times or more.

It will be apparent to those skilled in the art that other various configurations can be envisaged. Further, the first to third coating films described above are not used only in the above-described form, but can be appropriately modified and used without departing from the gist of the present invention. For example, in the above-described second laminated glass, a third coating film is used instead of the second coating film on the fourth surface, or in the first laminated glass, the first surface is formed on the first surface. A third coating film may be used instead of the coating film.

Next, examples of the present invention will be described. In the following description, Examples 1 to 5, Example 11 to Example 18, Example 51 to Example 58, Example 60 to Example 66 are examples, and Example 31 to Example 43 and Example 59 are comparative examples. is there.

(Example 1)
Laminated glass was produced by the following method.

First, a first film was formed on one surface of the first glass plate. For the first glass plate, colored glass (EverGreen (registered trademark): manufactured by Pilkington) having dimensions of 300 mm in length, 300 mm in width, and 6 mm in thickness was used.

The configuration of the first film was a three-layer structure as shown in FIG. The undercoat layer was a SiOx layer (target thickness 55 nm). The conductive oxide layer was an antimony-doped tin oxide layer (target thickness 260 nm). The high refractive index layer was a titanium oxide layer (target thickness 40 nm).

All of these layers were formed by a thermal CVD method. The undercoat layer was formed by diluting a raw material gas mixed with silane (SiH ₄ ) gas, carbon dioxide (CO ₂ ) gas, and ethylene (C ₂ H ₄ ) gas with nitrogen. The mixing ratio (molar ratio) of these source gases is about 6 for CO ₂ / SiH _{4 and} about 10 for C ₂ H ₄ / SiH ₄ . The substrate temperature during film formation is about 650 ° C.

For the formation of the conductive oxide layer, a mixed gas obtained by diluting a raw material of monobutyltin chloride (MBTC), water, and antimony trichloride (SbCl ₃ ) with air was used. The mixing ratio (molar ratio) of these source gases is about 1.3 for H ₂ O / MBTC and about 0.04 for SbCl ₃ / MBTC. The substrate temperature during film formation is about 590 ° C.

The titania layer was formed by diluting a mixed gas obtained by vaporizing a raw material of tetratitanium isopropoxide (TTIP) and MBTC with nitrogen. The mixing ratio (molar ratio) of these raw materials is about 0.07 for MBTC / TTIP. The substrate temperature during film formation is about 540 ° C. After film formation, the film was cut to a size of 70 mm length × 100 mm width.

Next, a second glass plate having a second film on one surface was prepared.

On the second glass plate, a second film is formed on a transparent float glass with a soda lime composition (Clear: manufactured by Asahi Glass Co., Ltd.) by an on-line CVD method. A cut one was used. The second film had a two-layer structure of an SiOx layer (undercoat layer) and a fluorine-added tin oxide layer (conductive oxide layer) as shown in FIG.

The SiOx layer was formed at a substrate temperature of about 670 ° C. during film formation. The fluorine-added tin oxide layer was formed at a film forming temperature of about 590 ° C. using a mixed gas obtained by evaporating a raw material of MBTC, water, and trifluoroacetic acid (TFA) as a raw material. The mixing ratio (molar ratio) of these raw materials is about 6 for H ₂ O / MBTC and about 0.3 for TFA / MBTC.

The thickness of the SiOx layer was 55 nm (target value), and the thickness of the fluorine-doped tin oxide layer was 320 nm (target value).

The two glass plates thus obtained were laminated with each other through an intermediate film to form a laminate. In this case, the surface of the first glass plate on which the first film is formed is the first outer side, and the surface of the second glass plate on which the second film is formed is the second outer side. In this manner, both glass plates were arranged with an intermediate film interposed therebetween. Laminated glass can be produced by a method of temporarily adhering two sheets of laminated glass and an intermediate film and then adhering them with an autoclave. Polyvinyl butyral is usually used as a material for the intermediate film. Other examples include ethylene-vinyl acetate copolymer.

Thereby, a laminated glass (hereinafter referred to as a laminated glass according to Example 1) was produced. In the laminated glass according to Example 1 obtained, the thickness of the interlayer film was 0.38 mm.

(Example 2 to Example 5)
A laminated glass was produced in the same manner as in Example 1. However, in Examples 2 to 5, the first glass plate of a type (and thickness) different from that of Example 1 was used. In Examples 3 and 5, the thickness of the second glass plate was changed to 3.2 mm. In Example 5, the Te value is 1% lower than in Example 4 configured by the same glass plate and the first coating, but this variation is caused by variations in characteristics due to film thickness variations occurring in the sample surface and spectrophotometers. It is a level that can be generated by two factors of fluctuation of the measured value.

The obtained laminated glasses are referred to as laminated glasses according to Examples 2 to 5, respectively.

(Example 11)
A laminated glass was produced in the same manner as in Example 1.

However, in Example 11, when the first glass, the intermediate film, and the second glass are laminated, the surface on which the first film of the first glass is formed faces the intermediate film ( In other words, the first glass was disposed so as to be inside. On the other hand, the 2nd glass plate was arrange | positioned so that the surface in which the 2nd film | membrane was formed might become a 2nd outer side.

This configuration corresponds to the configuration of the second laminated glass 200 shown in FIG. 4 described above. Therefore, here, the first film is referred to as a third film.

The obtained laminated glass is referred to as laminated glass according to Example 11.

(Examples 12 to 18)
A laminated glass was produced in the same manner as in Example 11. However, in Examples 12 to 18, the first glass plate and / or the second glass plate used were of a type (and thickness) different from Example 11. The configuration and deposition conditions of the second film are the same as the configuration and deposition conditions of the second film in Example 1. In Examples 12 and 14, the thickness of the second glass plate was changed to 3.2 mm. In Example 14, the Te value is 1% lower than in Example 15 composed of the same glass plate and the first coating, but this variation is caused by variation in characteristics due to film thickness variation occurring in the sample surface and the spectrophotometer. It is a level that can be generated by two factors of fluctuation of the measured value.

The obtained laminated glasses are referred to as laminated glasses according to Examples 12 to 18, respectively.

Tables 1 and 2 below collectively show the configurations of the laminated glasses according to Examples 1 to 5 and Examples 11 to 18.

(Example 31)
Laminated glass was produced by the following method.

First, a first film was formed on one surface of the first glass plate. A transparent float glass (Clear: manufactured by Asahi Glass Co., Ltd.) was used for the first glass plate.

The first film has a single layer structure of a mixed oxide layer of titania and tin oxide. This layer was formed by an on-line pyrolysis spray method. Two raw materials, oxylene glycol titanate (Oxylen Glycol Titanate), 2-methyltinacetate (Dimethyl Tin Diacetate) and solvent dimethylformamide (DimethylFormamide) are mixed and atomized with compressed air while being sprayed on the ribbon of float glass A physical layer was formed. The substrate temperature during film formation was about 520 ° C. The mixed oxide layer had a thickness of 45 nm (target value). After the film formation, the film was cut into dimensions of 70 mm length × 100 mm width × 6 mm thickness.

Next, a second glass plate having a second film on one surface was prepared.

On the second glass plate, a second film is formed on a transparent float glass with a soda lime composition (Clear: manufactured by Asahi Glass Co., Ltd.) by an on-line CVD method, and then the dimensions are 70 mm long × 100 mm wide × 6 mm thick. A cut one was used. The configuration and deposition conditions of the second film are the same as the configuration and deposition conditions of the second film in Example 1.

The two glass plates thus obtained were laminated with each other through an intermediate film to form a laminate. In this case, the surface of the first glass plate on which the first film is formed is the first outer side, and the surface of the second glass plate on which the second film is formed is the second outer side. In this manner, both glass plates were arranged with an intermediate film interposed therebetween.

Thereafter, both glass plates were joined to each other by the same treatment as in Example 1.

Thereby, a laminated glass (hereinafter referred to as a laminated glass according to Example 31) was produced.

(Example 32 to Example 35)
A laminated glass was produced in the same manner as in Example 31. However, in these examples 32 to 35, the first glass plate of a different type from that of example 31 was used.

The obtained laminated glasses are referred to as laminated glasses according to Examples 32 to 35, respectively.

(Example 36 to Example 37)
A laminated glass was produced in the same manner as in Example 31. However, in these examples 36 to 37, the first glass plate of a different type from that of example 31 was used. The first film is an iron, chromium, cobalt mixed oxide layer formed by a spray method. This film was formed by an on-line pyrolysis spray method. Three types of raw materials, iron, chromium, and cobalt acetylacetonate were mixed and dissolved in the solvent dimethylformamide, and the oxide layer was formed while atomizing with compressed air and spraying on a float glass ribbon. The thickness of the oxide layer was 40 nm (target value).

The obtained laminated glasses are referred to as laminated glasses according to Examples 36 to 37, respectively.

(Example 38)
A laminated glass was produced in the same manner as in Example 31.

However, in Example 38, the first film had a two-layer structure of a SiO _x layer and a conductive tin oxide. The target thickness of the SiO _x layer was 55 nm. The conductive tin oxide was an antimony-doped tin oxide layer, and the target thickness was 320 nm.

In Example 38, when the first glass, the intermediate film, and the second glass are laminated, the surface on which the first film of the first glass is formed faces the intermediate film ( In other words, the first glass was disposed so as to be inside. On the other hand, the 2nd glass plate was arrange | positioned so that the surface in which the 2nd film | membrane was formed might become a 2nd outer side.

This configuration corresponds to the configuration of the second laminated glass 200 shown in FIG. 4 described above. Therefore, here, the first film is referred to as a third film.

The obtained laminated glass is referred to as laminated glass according to Example 38.

(Example 39 to Example 41)
A laminated glass was produced in the same manner as in Example 38. However, in Examples 39 to 41, the first glass plate used was a different type from that in Example 38.

The obtained laminated glasses are referred to as laminated glasses according to Examples 39 to 41, respectively.

(Example 42)
A laminated glass was produced in the same manner as in Example 31.

However, in Example 42, the first film of the first glass plate has a two-layer structure of an SiOx layer and a conductive tin oxide, and the target thickness of the SiOx layer is 55 nm. The conductive tin oxide was a tin oxide layer to which antimony was added, and the target thickness was 320 nm.

Thereafter, the first glass plate was bonded to the second glass plate provided with the second film by the same treatment as in Example 31. Thereby, a laminated glass (hereinafter referred to as a laminated glass according to Example 42) was produced.

(Example 43)
A laminated glass was produced in the same manner as in Example 31.

However, in Example 43, the first film has a three-layer structure as shown in FIG.

Thereafter, the first glass plate was bonded to the second glass plate provided with the second film by the same treatment as in Example 31. Thereby, a laminated glass (hereinafter referred to as a laminated glass according to Example 43) was produced.

Tables 3 and 4 below collectively show the configurations of the laminated glasses according to Examples 31 to 43.

(Example 51 to Example 58)
Next, laminated glass having the third film having the seven-layer structure as shown in FIG. 6 was manufactured (Examples 51 to 58). A laminated glass having a third film having a 10-layer structure was produced (Example 59). Furthermore, laminated glass having a third film having an eight-layer structure was produced (Examples 60 to 63).

Among these, laminated glasses having a third film having a seven-layer structure (Examples 51 to 54) were produced as follows.

First, a third film was formed on one surface of the first glass plate. As the first glass plate, transparent float glass (Clear: manufactured by Asahi Glass Co., Ltd.) having dimensions of 70 mm in length, 100 mm in width, and 6 mm in thickness was used. Each layer constituting the third film was continuously formed using an in-line type sputtering apparatus.

The first, second and third dielectric layers were zinc oxide layers (AZO layers) to which aluminum was added. During film formation, an aluminum zinc alloy target to which 2 wt% of aluminum was added was used, and 100 sccm of carbon dioxide was introduced as a discharge gas. The film forming pressure at this time was 0.35 Pa.

The first and second functional layers were silver layers to which palladium was added (AgPd layers). At the time of film formation, a silver palladium alloy target to which 1 wt% of palladium was added was used, and 50 sccm of argon was introduced as a discharge gas. The film forming pressure at this time was 0.14 Pa.

The first and second barrier layers were titanium layers. When forming the titanium layer, a titanium target was used, and 100 sccm of argon was introduced as a discharge gas. The film forming pressure at this time was 0.25 Pa.

On the second glass plate, a second film is formed on a transparent float glass with a soda lime composition (Clear: manufactured by Asahi Glass Co., Ltd.) by an on-line CVD method, and then the dimensions are 70 mm long × 100 mm wide × 6 mm thick. A cut one was used. The configuration and deposition conditions of the second film are the same as the configuration and deposition conditions of the second film in Example 1. Thereafter, both glass plates were bonded to each other by the same treatment as in Example 31. Thereby, a laminated glass (hereinafter referred to as a laminated glass according to Examples 51 to 54) was produced. In Examples 55 to 58, laminated glass was produced by the same method. However, in these examples, the second film formed on the second glass plate is the same as the second film in Example 1 except that the tin oxide layer is a film in which antimony is added instead of fluorine. It is the same.

(Examples 60 to 66)
First, a first film was formed on one surface of the first glass plate. As the first glass plate, transparent float glass (Clear: manufactured by Asahi Glass Co., Ltd.) having dimensions of 70 mm in length, 100 mm in width, and 6 mm in thickness was used.

The first film has a seven-layer structure as shown in FIG. Each layer was continuously formed using an in-line type sputtering apparatus.

For the first and second dielectric layers (AZO films), an aluminum zinc alloy target to which 2 wt% of aluminum was added was used, and carbon dioxide was introduced at 100 sccm as a discharge gas to form a film. The film forming pressure at this time was 0.35 Pa.

For the third dielectric layer (AZO film, SZO film), an aluminum zinc alloy target to which 2 wt% of aluminum was added was used, and an AZO film formed by introducing 100 sccm of carbon dioxide as a discharge gas; and tin Using a tin-zinc alloy target containing 50 wt%, an SZO film was formed by introducing argon: oxygen at 30:70 sccm. The deposition pressure of the SZO film was 0.50 Pa.

The first and second functional layers (AgPd films) were formed by using a silver-palladium alloy target to which 1 wt% of palladium was added and introducing argon at 50 sccm as a discharge gas. The film forming pressure at this time was 0.14 Pa.

The first and second barrier layers (Ti film, NiCr film) were formed using a titanium target or a nickel chromium alloy target containing 50 wt% of nickel and introducing 100 sccm of argon as a discharge gas. The film forming pressure at this time was 0.25 Pa.

On the second glass plate, a second film is formed on a transparent float glass with a soda lime composition (Clear: manufactured by Asahi Glass Co., Ltd.) by an on-line CVD method. A cut one was used. The configurations and deposition conditions of the second film in Examples 60, 61, and 64 to 66 are the same as the configurations and deposition conditions of the second film in Examples 51 to 54. The configuration and deposition conditions of the second film are the same as the configuration and deposition conditions of the second film in Examples 55 to 58.

Thereafter, both glass plates were bonded to each other by the same treatment as in Examples 51 to 58. Thereby, a laminated glass (hereinafter referred to as a laminated glass according to Examples 60 to 66) was produced. Tables 5 and 6 below collectively show the configurations of the laminated glasses according to Examples 51 to 66.

(Evaluation)
The following evaluation was performed using each laminated glass manufactured as described above.

(Evaluation of optical properties)
Each laminated glass was spectroscopically measured using a spectrophotometer U4100 manufactured by HITACHI, and the visible light reflectance Rv _out (%), the energy reflectance Re _out , the shielding coefficient SC, and the visible light were measured in accordance with ISO 9050: 2003. The light transmittance Tv (%) was calculated.

In addition, these measurements were performed by irradiating light from the first outside of each laminated glass, that is, from the outside of the first glass plate. The emissivity was measured by using an Emissometer manufactured by DEVICES AND SERVICES COMPANY, and calculated using a conversion formula with a measurement result obtained in advance by an infrared spectrometer JAFT FT / IR-420.

Table 7 below collectively shows the visible light reflectance Rv _out (%), energy reflectance Re _out , shielding coefficient SC, and visible light transmittance Tv (%) obtained in each laminated glass.

FIG. 7 shows a graph plotting the relationship between the visible light transmittance Tv (%) and the shielding coefficient SC obtained in each laminated glass. FIG. 8 is a graph plotting the relationship between the visible light transmittance Tv (%) and the visible light reflectance Rv _out (%) obtained in each laminated glass. FIG. 9 is a graph plotting the relationship between the energy transmittance Te (%) of the first glass and the shielding coefficient SC obtained in each laminated glass. FIG. 10 is a graph plotting the relationship between the energy reflectance Re _out (%) and the shielding coefficient SC obtained in each laminated glass.

Note that the measurement results of the laminated glasses according to Examples 31 to 32, 37 to 40, and 42 to 43 cannot be confirmed from FIG. This is because the measurement results of these examples greatly deviate from the ranges of the vertical axis and the horizontal axis shown in FIG.

Moreover, the measurement result of the laminated glass which concerns on Example 31, 38, 42, 43 cannot be confirmed from FIG. 9 and FIG. This is because the measurement results of these examples greatly deviate from the range of the vertical axis shown in FIGS.

From FIG. 7, in the case of the laminated glasses according to Examples 1 to 5, Example 11 to Example 18, and Example 51 to Example 66, any plot is included in the region A represented by the shielding coefficient SC ≦ 0.35. I understand that Further, from FIG. B8, in the case of the laminated glass according to Examples 1 to 5, Example 11 to Example 18, and Example 51 to Example 66, all plots are regions represented by visible light reflectance Rv _out ≦ 30%. It can be seen that it is included in B.

On the other hand, in the case of the laminated glasses according to Examples 31 to 43, it can be seen that the plot is not included in at least one of the regions A and B.

From this, the laminated glasses according to Examples 1 to 5, 11 to 18 and 51 to 66 have good heat shielding properties, and reflection from the first side is significantly suppressed. It can be said.

In addition, in the laminated glasses according to Examples 1 to 5, 11 to 18, and 51 to 66, all plots satisfy the visible light transmittance Tv (%)> 26%, and the transmission is sufficient. It was found to have sex.

In the case of laminated glass according to Examples 1 to 5, Example 11 to Example 18, and Example 51 to Example 66 from FIG. 9, all plots are included in the region C represented by the shielding coefficient SC ≦ 0.35. I understand. In these plots, the SC tends to increase as the energy transmission Te of the first glass increases. Both of these plots are in the region of Te <50% of the first glass, and when Te is larger than this region, the SC value exceeds 0.35. On the other hand, in the case of the laminated glass according to Examples 31 to 43, the plot does not include this region. Examples 33, 34, 36, and 37 are in the region of the shielding coefficient SC ≦ 0.35, but these are distributed in the region of visible light reflectance Rv _out > 30% as shown in FIG. Design glare is lost because of the glaring effect.

Further, in the case of the laminated glass according to Examples 1 to 5, Example 11 to Example 18, and Example 51 to Example 66 from FIG. 10, any plots are included in the region D represented by the shielding coefficient SC ≦ 0.35. I understand that. In these plots, the SC tends to decrease as the energy reflectivity Re _out increases. Located _{Re out} ≧ 4% of the area of even any one of these plots the first _glass, when _{Re out} is less than this region can be expected that the SC value is above 0.35. Examples 33, 34, 36, and 37 are in the region of the shielding coefficient SC ≦ 0.35, but these are distributed in the region of visible light reflectance Rv _out > 30% as shown in FIG. Design glare is lost because of the glaring effect.

(Evaluation of reflection color)
Next, the reflection color was evaluated using the laminated glasses according to Examples 1 to 5, 11 to 18 and 51 to 66. Specifically, the reflected color was evaluated for the reflected light when visible light was irradiated from the first side of the laminated glass (that is, the first glass plate side). The incident angles were 5 ° and 55 °. The reflected color was quantified by expressing the reflected light obtained according to ISO 9050: 2003 with CIE1976L ^* a ^* b ^* chromaticity coordinates. Table 8 below summarizes the evaluation results of the reflection colors obtained in the laminated glasses according to Examples 1 to 5, 11 to 18 and 60 to 66.

As shown in Table 8, in any laminated glass except Example 59, it was found that the reflected color was in the third quadrant, that is, in a region where both a ^* and b ^* were negative. In addition, the absolute values of a ^* and b ^* were sufficiently small. From this, it was found that the reflection color of these laminated glasses is in the light green to light blue region.

Since the reflected color in this region rarely gives the viewer a sense of incongruity and tends to be preferred, it can be said that these laminated glasses have good design properties.

Thus, in the case of the laminated glasses according to Examples 1 to 5, Examples 11 to 18, and Examples 51 to 66, it was confirmed that there is little possibility that the design properties of the laminated glass deteriorate due to the reflection color. In particular, it was confirmed that Examples 64-66 had excellent color tone as compared with other forms. In Example 59, there is a concern that the reflection color gives a sense of incongruity because a ^* is positive in the 55 ° incident reflection color.

The present invention can be suitably used for, for example, a window glass of a building.

This application claims priority based on Japanese Patent Application No. 2015-107729 filed on May 27, 2015 and Japanese Patent Application No. 2015-243501 filed on December 14, 2015. The entire contents of the Japanese application are incorporated herein by reference.

DESCRIPTION OF SYMBOLS 100 1st laminated glass 101 1st outer side 102 2nd outer side 110 1st glass plate 112 1st surface 114 2nd surface 120 2nd glass plate 122 3rd surface 124 4th surface 130 Middle 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 outer side 202 Second outer surface 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 83 functional layer 283A first functional layer 284 a 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. A laminated glass constituted by joining a first glass plate and a second glass plate via an intermediate film,
   The first glass plate has a first surface and a second surface that face each other, and the second glass plate has a third surface and a fourth surface that face each other, and The surface is disposed on the side farther from the intermediate film than the second surface, the fourth surface is disposed on the side farther from the intermediate film than the third surface,
   A first coating film is provided on the first surface or the second surface,
   A second coating film is provided on the fourth surface,
   From the side of the first glass plate of the laminated glass, the visible light reflectance measured in accordance with ISO 9050: 2003 is Rv _out (%), the solar heat gain is g value, and the visible light transmittance is When Tv (%) and the value represented by the following formula (1) are the shielding coefficient SC,
   
   SC = g value / 0.88 (1) Formula
   Rv _out ≦ 30%, Tv> 26% and SC ≦ 0.35,
   A numerical value is obtained by expressing reflected light obtained in accordance with ISO 9050: 2003 with CIE 1976 L ^* a ^* b ^* chromaticity coordinates with respect to light incident at an angle of 5 degrees and 55 degrees from the side of the first glass plate. When laminated, a ^* b ^* is 3 or less in laminated glass.
2. The laminated glass according to claim 1, wherein SC ≦ 0.33.
3. The laminated glass according to claim 1 or 2, wherein a ^* >-10 and b ^* >-20 are satisfied.
4. The energy transmittance Te measured according to ISO 9050: 2003 of the laminate of the first glass plate and the first coating film is 50% or less, and the second coating film has an emissivity of 0.4 or less. The laminated glass according to any one of claims 1 to 3, which is a film.
5. The laminated glass according to any one of claims 1 to 4, wherein an energy reflectance Re _out measured according to ISO 9050: 2003 from the side of the first glass plate of the laminated glass is 4% ≤ Re _out. .
6. 6. The number of defects in a range of 1 mm × 1 mm, which is measured by observing the surface of the second coating film with a microscope (50 times) after a 3-day sweat resistance test according to ISO12870, is 50 or less. The laminated glass in any one.
7. The laminated glass according to any one of claims 1 to 6, wherein at least one of the first and second coating films contains a conductive tin oxide.
8. The laminated glass according to any one of claims 1 to 7, wherein at least one of the first and second coating films contains a nitride.
9. The laminated glass according to any one of claims 1 to 8, wherein at least one of the first and second coating films contains silver.
10. The laminated glass according to claim 7, wherein the conductive tin oxide includes Sb-doped tin oxide.
11. The laminated glass according to claim 7, wherein the conductive tin oxide includes F-doped tin oxide.
12. The laminated glass according to claim 7, wherein an undercoat is provided between the conductive tin oxide and the first or second glass plate.
13. The laminated glass according to claim 12, wherein the undercoat is a multilayer film.
14. A laminated glass constituted by joining a first glass plate and a second glass plate via an intermediate film,
    The first glass plate has a first surface and a second surface that face each other, and the second glass plate has a third surface and a fourth surface that face each other, and The surface is disposed on the side farther from the intermediate film than the second surface, the fourth surface is disposed on the side farther from the intermediate film than the third surface,
    A first coating film is provided on the second surface,
    A second coating film is provided on the fourth surface,
    The first coating film is a laminated glass including two layers mainly composed of silver or a silver alloy, and a layer closer to the second surface is thicker than the other layer.
15. The laminated glass according to claim 14, wherein the ratio of the thickness of the other layer to the thickness of the layer close to the second surface is 0.4 to 0.8.
16. A laminated glass constituted by joining a first glass plate and a second glass plate via an intermediate film,
    The first glass plate has a first surface and a second surface that face each other, and the second glass plate has a third surface and a fourth surface that face each other, and The surface is disposed on the side farther from the intermediate film than the second surface, the fourth surface is disposed on the side farther from the intermediate film than the third surface,
    A first coating film is provided on the second surface,
    A second coating film is provided on the fourth surface,
    The first coating film includes two layers mainly composed of silver or a silver alloy, and the thickness of the layer closer to the second surface is less than 10 nm, and the second coating film Laminated glass in which the ratio of the thickness of the other layer to the thickness of the layer near the surface is 2.5 or more.

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