Laminated glass

Abstract

This application provides a laminated window glass. The laminated window glass includes an outer glass plate, an adhesive layer, an inner glass plate, and a first infrared barrier layer. The outer glass plate includes a first surface and a second surface that are oppositely disposed, the inner glass plate includes a third surface and a fourth surface that are oppositely disposed, the adhesive layer is disposed between the second surface and the third surface, and the first infrared barrier layer is disposed on the fourth surface. When the incident angle of visible light is 0° to 70°, the inner visible light reflectance of the laminated window glass is 16% or less. The laminated window glass has relatively good heat insulation performance and relatively low visible light transmittance, and the visible light reflectance measured from the inside of the vehicle is relatively low. Thereby, it prevents obvious reflection of passengers and objects inside the vehicle on the sunroof glass, and improves the riding comfort of the passengers.

Description

Technical Field

[0001] This application relates to the technical field of glass products, and particularly to laminated glass installed in vehicles.

Background Art

[0002] As the market demand for new energy vehicles increases, since power battery components are installed in the chassis of new energy vehicles, the interior height of the vehicle becomes shorter. As a result, an increasing number of automobile manufacturers are removing the sunshade that was conventionally attached to the sunroof glass in order to obtain a larger interior height of the vehicle. Due to the removal of the sunshade, sunlight can directly enter the vehicle through the sunroof glass. Especially when the sunroof glass is panoramic canopy glass or panoramic sunroof glass, the brightness inside the vehicle is too high, which not only obstructs the vision of passengers, reduces the riding comfort of passengers, but also requires more energy to be consumed to adjust the temperature inside the vehicle in both summer and winter. To overcome the above problems, in the prior art, generally, sunroof glass with low visible light transmittance that can be heat-insulated, for example, sunroof glass with a visible light transmittance of 16% or less, is used. However, after it is installed in the vehicle, since the visible light transmittance of the sunroof glass is low and the visible light reflectance measured from inside the vehicle is high, obvious reflections of passengers and objects inside the vehicle on the sunroof glass are likely to occur. This will cause great visual obstacles to passengers, especially passengers in the rear seats.

Summary of the Invention

[0003] This application aims to provide laminated glass. The laminated glass has relatively good heat insulation performance and relatively low visible light transmittance, and the visible light reflectance measured from inside the vehicle is relatively low. Thereby, it prevents obvious reflections of passengers and objects inside the vehicle on the sunroof glass and improves the riding comfort of passengers.

[0004] This application provides a laminated window glass. The laminated window glass includes an outer glass plate, an adhesive layer, an inner glass plate, and a first infrared barrier layer. The outer glass plate includes a first surface and a second surface that are oppositely disposed, the inner glass plate includes a third surface and a fourth surface that are oppositely disposed, the adhesive layer is disposed between the second surface and the third surface, and the first infrared barrier layer is disposed on the fourth surface. When the incident angle θ of visible light satisfies 60° < θ ≤ 70°, the inner visible light reflectance of the laminated window glass is 16% or less.

[0005] When the incident angle θ of visible light satisfies 40° < θ ≤ 60°, the inner visible light reflectance of the laminated window glass is 8% or less.

[0006] When the incident angle θ of visible light satisfies 0° ≤ θ ≤ 40°, the inner visible light reflectance of the laminated window glass is 4% or less.

[0007] The visible light transmittance of the laminated window glass is 16% or less, the visible light transmittance of the outer glass plate is 70% or more, and the visible light transmittance of the inner glass plate is 10% - 50%.

[0008] The adhesive layer is a thermoplastic polymer layer with a visible light transmittance of 70% or more.

[0009] The first infrared barrier layer includes a transparent conductive oxide (TCO) layer, a first absorption layer, and a first low refractive index layer that are sequentially laminated on the fourth surface, and the refractive index of the first low refractive index layer is less than 1.9.

[0010] The material of the transparent conductive oxide layer is at least one of ITO, NiCrO x , FTO, ZnSnO x , doped zinc oxide, and the doping element of the doped zinc oxide is at least one of aluminum, tungsten, hafnium, gallium, yttrium, niobium, neodymium.

[0011] The material of the first absorption layer is at least one of NiCr, NiAl, NiSi, Cr, TiN, NbN, MoTi.

[0012] The thickness of the transparent conductive oxide layer is 50 nm to 300 nm, the thickness of the first absorption layer is 2 nm to 30 nm, and the thickness of the first low refractive index layer is 10 nm to 300 nm.

[0013] The first absorption layer is in direct contact with the transparent conductive oxide layer, and the first low refractive index layer is in direct contact with the first absorption layer.

[0014] The first infrared barrier layer further includes a second absorption layer and a second low refractive index layer. The second absorption layer is disposed between the first low refractive index layer and the second low refractive index layer. The second low refractive index layer is farther from the fourth surface than the first low refractive index layer.

[0015] The first infrared barrier layer further includes at least one laminated structure. The at least one laminated structure is disposed between the fourth surface and the transparent conductive oxide layer. Each laminated structure includes a lower high refractive index layer and a lower low refractive index layer. The lower high refractive index layer is closer to the fourth surface than the lower low refractive index layer. The refractive index of the lower high refractive index layer is 1.9 or more, and the refractive index of the lower low refractive index layer is less than 1.9.

[0016] The first infrared barrier layer further includes an outermost high refractive index layer. The outermost high refractive index layer is the layer farthest from the fourth surface in the first infrared barrier layer. The refractive index of the outermost high refractive index layer is 1.9 or more, and the thickness of the outermost high refractive index layer is 5 nm to 50 nm.

[0017] The thickness of the first low refractive index layer or the thickness of the second low refractive index layer is greater than the thickness of the outermost high refractive index layer.

[0018] The emissivity of the laminated window glass measured from the inner glass plate is 0.35 to 0.5.

[0019] The emissivity of the laminated window glass measured from the inner glass plate is less than 0.35.

[0020] The laminated window glass further includes a second infrared barrier layer. The second infrared barrier layer is disposed between the outer glass plate and the inner glass plate, and the second infrared barrier layer includes at least one metal layer and at least two dielectric layers. Each metal layer is disposed between two adjacent dielectric layers, and the material of the metal layer is a metal or a metal alloy of at least one element among Ag, Au, Cu, Al, Pt.

[0021] The second infrared barrier layer further includes at least one NiCr absorption layer, and the thickness of the NiCr absorption layer is 3 nm or more.

[0022] The transmittance index A of the laminated window glass is greater than 8. The transmittance index A is calculated according to the formula A = TL / (TE * TL1), where TL is the visible light transmittance of the laminated window glass, TE is the solar radiation transmittance of the laminated window glass, and TL1 is the total visible light transmittance of the inner glass plate and the first infrared barrier layer.

[0023] The transmittance index A of the laminated window glass is 10 or more.

[0024] This application provides a laminated window glass. The laminated window glass can meet comprehensive requirements such as good heat insulation performance, good low-emission performance, low visible light transmittance, and relatively low visible light reflectance for in-vehicle light within the incident angle range of 0° to 70°. Therefore, the low-angle reflection reduction effect and the medium-high angle reflection reduction effect are good. As a result, it is less likely for obvious reflections of passengers and objects inside the vehicle on the laminated window glass to occur, weakening and even eliminating the visual interference to passengers, especially passengers in the rear seats, and improving the thermal comfort, brightness comfort, and visual comfort inside the vehicle.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0026] Hereinafter, the content of the present application will be further described with reference to the drawings.

[0027] Referring to FIG. 1, FIG. 1 is a diagram showing the structure of a vehicle 1 to which a laminated window glass 1000 according to an embodiment of the present application is attached.

[0028] The vehicle 1 includes a laminated window glass 1000 and a vehicle body 2000. A vehicle body opening 2100 is provided in the vehicle body 2000, and the laminated window glass 1000 is attached to the vehicle body opening 2100 and used as a sunroof glass. The laminated window glass 1000 may be used as a side glass or a sunroof glass. In the embodiment of the present application, the case of being used as a sunroof glass is exemplified.

[0029] For the sake of convenience of explanation, the length direction of the laminated window glass 1000 shown in FIG. 1 is shown as the X-axis direction, the width direction is shown as the Y-axis direction, and the thickness direction is shown as the Z-axis direction. The positive direction of the Z-axis is the direction from the outside to the inside of the vehicle 1.

[0030] The laminated window glass 1000 according to the embodiment of the present application can reduce the transmission of light such as infrared rays, ultraviolet rays, and visible light into the interior of the vehicle 1 after being attached to the vehicle body opening 2100, has relatively good heat insulation performance and relatively low visible light transmittance, and can improve the thermal comfort and brightness comfort inside the vehicle. At the same time, the laminated window glass 1000 can also reduce the heat radiation from the outside of the vehicle into the interior of the vehicle 1 in summer and reduce the heat dissipation from the interior of the vehicle to the outside of the vehicle 1 in winter, thereby meeting the requirements of energy conservation and environmental protection. Furthermore, when measuring the visible light reflectivity of the laminated window glass 1000 from the inside of the vehicle, the measured visible light reflectivity is also relatively low, so it is less likely to cause obvious reflection of the passengers and objects inside the vehicle on the sunroof glass, weakening and even eliminating the visual interference to the passengers, especially the passengers in the rear seats, and improving the visual comfort inside the vehicle.

[0031] Referring to FIG. 2, FIG. 2 is a diagram showing the cross-sectional structure of the laminated window glass according to the first embodiment of the present application along the thickness direction.

[0032] The laminated window glass 1000 includes a laminated glass 100 and a first infrared barrier layer 200. The laminated glass 100 includes an outer glass plate 110, an adhesive layer 120, and an inner glass plate 130. The adhesive layer 120 is installed between the outer glass plate 110 and the inner glass plate 130. The outer glass plate 110 includes a first surface 111 and a second surface 112 that are oppositely installed. The first surface 111 faces the outside of the vehicle 1, and the second surface 112 is close to the adhesive layer 120. The inner glass plate 130 includes a third surface 131 and a fourth surface 132 that are oppositely installed. The third surface 131 is close to the adhesive layer 120, and the fourth surface 132 faces the interior of the vehicle 1. The first infrared barrier layer 200 is installed on the fourth surface 132. Along the positive direction of the Z axis, the light from outside the vehicle passes through the outer glass plate 110, the adhesive layer 120, the inner glass plate 130, and the first infrared barrier layer 200 in sequence and enters the interior of the vehicle.

[0033] In this embodiment, the visible light transmittance of the outer glass plate 110 is 70% or more, and the visible light transmittance of the inner glass plate 130 is 10% to 50%. Specifically, the inner glass plate 130 may be a colored glass such as green glass, gray glass, blue glass, or brown glass. When a colored glass is used as the inner glass plate 130, by installing the first infrared barrier layer 200 on the fourth surface 132 of the inner glass plate 130, the visible light transmittance of the laminated window glass 1000 can be made relatively low. Thereby, needs such as privacy or light shielding can be satisfied, and reduction of heat radiation from outside the vehicle 1 to the inside of the vehicle 1 in summer and reduction of heat dissipation from the inside of the vehicle 1 to the outside of the vehicle 1 in winter can also be realized.

[0034] The adhesive layer 120 is a thermoplastic polymer layer having a visible light transmittance of 70% or more, and is used to bond the outer glass plate 110 and the inner glass plate 130 to form a laminated structure. The material of the adhesive layer 120 may be selected from polyvinyl butyral (PVB), ionomer interlayer (SGP), ethylene vinyl acetate (EVA), polyurethane (PU), etc., and preferably transparent polyvinyl butyral (PVB). In the present application, a thermoplastic polymer layer having a visible light transmittance of 70% or more can also realize that the visible light transmittance of the laminated window glass 1000 is 16% or less, preferably 12% or less, more preferably 10% or less, and further 1% to 5%. There is no need to select a more expensive dark-colored thermoplastic polymer layer, thereby reducing the manufacturing cost. As can be understood, in the present application, in order to provide a wider combination of products, a thermoplastic polymer layer having a visible light transmittance of less than 70% may be used as needed, for example, gray PVB may be used.

[0035] When the laminated window glass 1000 according to an embodiment of the present application is used as a sunroof glass, the first infrared barrier layer 200 provided on the fourth surface 132 can reduce the emissivity measured from the inside of the vehicle of the laminated window glass 1000, and thus can reduce the solar heat gain factor Tts of the laminated window glass 1000. In addition, it is also possible to reduce the visible light reflectivity measured from the inside of the vehicle of the laminated window glass 1000 and realize a relatively low visible light reflectivity of the laminated window glass 1000 with respect to the in-vehicle light rays within a relatively wide range of incident angles. Thereby, the high-angle reflection reduction effect with respect to the in-vehicle light rays can be improved, making it difficult for the passengers in the rear seats to observe obvious reflections in the sunroof glass, weakening and even eliminating the visual interference to the passengers, and improving the visual comfort inside the vehicle.

[0036] The laminated window glass 1000 according to an embodiment of the present application can surely realize the low-angle reflectivity reduction effect. When visible light is incident on the laminated window glass 1000 according to an embodiment of the present application at an incident angle θ of 0° ≤ θ ≤ 40°, the inner visible light reflectivity of the laminated window glass 1000 is 4% or less. The laminated window glass 1000 according to an embodiment of the present application can also realize the medium-high angle reflectivity reduction effect. The laminated window glass 1000 has an inner visible light reflectivity of 8% or less with respect to visible light having an incident angle θ of 40° < θ ≤ 60°, and further, the laminated window glass 1000 has an inner visible light reflectivity of 16% or less with respect to visible light having an incident angle θ of 60° < θ ≤ 70°. The inner visible light reflectivity is the visible light reflectivity when visible light is incident on the laminated window glass 1000 from the inside of the vehicle.

[0037] Referring to FIG. 3, FIG. 3 is a diagram showing the structure in the first example of the first infrared barrier layer 200 of the laminated window glass 1000 shown in FIG. 2.

[0038] Along the positive direction of the Z-axis, that is, along the direction from the outer glass plate 110 towards the inner glass plate 130, the first infrared barrier layer 200 includes a transparent conductive oxide layer 210, a first absorption layer 220, and a first low refractive index layer 230 sequentially laminated on the fourth surface 132. In the present embodiment, the transparent conductive oxide layer 210 is in direct contact with the fourth surface 132 of the inner glass plate 130, the first absorption layer 220 is in direct contact with the transparent conductive oxide layer 210, and the first low refractive index layer 230 is in direct contact with the first absorption layer 220.

[0039] The emissivity of ordinary laminated glass is usually about 0.9, and the transparent conductive oxide layer 210 is used to reduce the emissivity of the laminated window glass 1000. The emissivity of the laminated window glass 1000 measured from the inside of the vehicle, that is, from the side of the inner glass plate 130, is 0.5 or less. In some specific embodiments, the material of the transparent conductive oxide layer 210 is ITO (indium tin oxide), NiCrO x , FTO (fluorine-doped tin oxide), ZnSnO x , and at least one of doped zinc oxide. The doping element in the doped zinc oxide may be at least one of aluminum, tungsten, hafnium, gallium, yttrium, niobium, neodymium, and examples thereof include AZO (aluminum-doped zinc oxide), HAZO (hafnium and aluminum-doped AZO). In some embodiments, the thickness of the transparent conductive oxide layer 210 is 50 nm to 300 nm. In some other embodiments, the thickness of the transparent conductive oxide layer 210 is 60 nm to 280 nm. The transparent conductive oxide layer 210 may have a single-layer structure such as only one ITO layer, or may have a multilayer structure. The meaning of "multilayer" is two or more layer numbers and the materials of adjacent layers are not the same. For example, the transparent conductive oxide layer 210 includes a sequentially laminated ZnSnO x layer / ITO layer, or the transparent conductive oxide layer 210 includes a sequentially laminated ITO layer / HAZO layer, or the transparent conductive oxide layer 210 includes a sequentially laminated ZnSnO xIt includes a layer / ITO layer / HAZO layer. In some specific embodiments, the emissivity of the laminated window glass 1000 measured from the side of the vehicle interior, i.e., from the inner glass plate 130, is 0.35 to 0.5. Thereby, the laminated window glass 1000 can be manufactured more simply and inexpensively. Specifically, it can be exemplified that the emissivity of the laminated window glass 1000 is 0.36, 0.41, 0.45, 0.47, etc. In some specific embodiments, the emissivity of the laminated window glass 1000 measured from the side of the vehicle interior, i.e., from the inner glass plate 130, is less than 0.35, more preferably less than 0.3, and even more preferably less than 0.25. Thereby, better heat insulation performance and heat preservation performance can be realized. Specifically, it can be exemplified that the emissivity of the laminated window glass 1000 is 0.11, 0.15, 0.16, 0.17, 0.22, 0.23, etc.

[0040] The first absorption layer 220 is used on the one hand to further reduce the emissivity of the laminated window glass 1000, and on the other hand to reduce the visible light transmittance and visible light reflectivity of the laminated window glass 1000. In some specific embodiments, the material of the first absorption layer 220 is at least one of NiCr, NiAl, NiSi, Cr, TiN, NbN, MoTi. In some embodiments, the thickness of the first absorption layer 220 is 2 nm to 30 nm. In some other embodiments, the thickness of the first absorption layer 220 is 3 nm to 20 nm, and specifically, it may be 3.5 nm, 4 nm, 5 nm, 6 nm, 7 nm, 8 nm, 9 nm, 10 nm, 11 nm, 15 nm, 18 nm, etc.

[0041] The refractive index of the first low refractive index layer 230 is less than 1.9. The first low refractive index layer 230 is in direct contact with the first absorption layer 220 and is used to adjust the optical color of the bonding window glass 1000 and reduce the visible light reflectivity of the bonding window glass 1000 for in-vehicle light with a high incident angle. In some specific embodiments, the material of the first low refractive index layer 230 is an oxide containing one or more of elements such as Al, Mg, Zn, Si, Zr, Sn, Ca, V. In some embodiments, the thickness of the first low refractive index layer 230 is 10 nm to 300 nm. In some other embodiments, the thickness of the first low refractive index layer 230 is 20 nm to 280 nm. As can be understood, the first low refractive index layer 230 may have a single-layer structure or a multilayer structure such as an SiO2 layer / SiAlO x layer.

[0042] In the embodiments of the present application, the first infrared barrier layer 200 is formed by sequentially laminating a transparent conductive oxide layer 210, a first absorption layer 220, and a first low refractive index layer 230. Thereby, on the one hand, the emissivity of the bonding window glass 1000 can be reduced, and on the other hand, since the bonding window glass 1000 has a relatively low visible light reflectivity for in-vehicle light within a relatively wide incident angle range, a high-angle reflection reduction effect for in-vehicle light is realized, and visual interference due to specular reflection of people and objects inside the vehicle is avoided.

[0043] Referring to FIG. 4, FIG. 4 is a diagram showing the structure in the second example of the first infrared barrier layer 200 of the bonding window glass 1000 shown in FIG. 2.

[0044] The difference between the first infrared barrier layer 200 in this example and the first infrared barrier layer 200 in the first example is that the first infrared barrier layer 200 in this example further includes a second absorption layer 221 and a second low refractive index layer 240. The second absorption layer 221 is disposed between the first low refractive index layer 230 and the second low refractive index layer 240, and the second low refractive index layer 240 is farther from the fourth surface 132 than the first low refractive index layer 230. That is, the first infrared barrier layer 200 in the second example includes a transparent conductive oxide layer 210, a first absorption layer 220, a first low refractive index layer 230, a second absorption layer 221, and a second low refractive index layer 240 sequentially laminated on the fourth surface 132. In some embodiments, the thickness of the second absorption layer 221 is 2 nm to 30 nm. In some specific embodiments, the material of the second absorption layer 221 is at least one of NiCr, NiAl, NiSi, Cr, TiN, NbN, MoTi.

[0045] The refractive index of the second low refractive index layer 240 is less than 1.9. In some specific embodiments, the material of the second low refractive index layer 240 is an oxide containing one or more of elements such as Al, Mg, Zn, Si, Zr, Sn, Ca, V. In some embodiments, the thickness of the second low refractive index layer 240 is 10 nm to 300 nm. In some other embodiments, the thickness of the second low refractive index layer 240 is 20 nm to 280 nm. As can be understood, the second low refractive index layer 240 may also have a single-layer structure or a multi-layer structure.

[0046] In other examples, the first infrared barrier layer 200 can further include more absorption layers such as a third absorption layer, a fourth absorption layer, etc. The first infrared barrier layer 200 including the third absorption layer can specifically include, for example, a transparent conductive oxide layer 210, a first absorption layer 220, a first low refractive index layer 230, a second absorption layer 221, a second low refractive index layer 240, a third absorption layer, and a third low refractive index layer, which are sequentially laminated on the fourth surface 132. The first infrared barrier layer 200 including the fourth absorption layer can specifically include, for example, a transparent conductive oxide layer 210, a first absorption layer 220, a first low refractive index layer 230, a second absorption layer 221, a second low refractive index layer 240, a third absorption layer, a third low refractive index layer, a fourth absorption layer, and a fourth low refractive index layer, which are sequentially laminated on the fourth surface 132.

[0047] Referring to FIG. 5, FIG. 5 is a diagram showing the structure in the third example of the first infrared barrier layer 200 of the combined window glass 1000 shown in FIG. 2.

[0048] The difference between the first infrared barrier layer 200 in this example and the first infrared barrier layer 200 in the first example is that the first infrared barrier layer 200 in this example further includes a laminated structure 250. The laminated structure 250 is installed between the inner glass plate 130 and the transparent conductive oxide layer 210. As can be understood, the laminated structure 250 can be added to the first infrared barrier layer 200 in other examples.

[0049] Along the positive direction of the Z-axis, the stacked structure 250 includes a lower high refractive index layer 251 and a lower low refractive index layer 252 that are sequentially stacked. The lower high refractive index layer 251 is directly installed on the fourth surface 132, and the lower low refractive index layer 252 is installed between the lower high refractive index layer 251 and the transparent conductive oxide layer 210. That is, the first infrared barrier layer 200 in the third example includes a lower high refractive index layer 251, a lower low refractive index layer 252, a transparent conductive oxide layer 210, a first absorption layer 220, and a first low refractive index layer 230 that are sequentially stacked on the fourth surface 132. By installing the stacked structure 250, the diffusion of alkali metal ions from the inner glass plate 130 to the first infrared barrier layer 200 can be reduced or prevented, and thus the performance of the first infrared barrier layer 200 can be prevented from being impaired by alkali metal ions. At the same time, due to the combined action of the lower high refractive index layer 251 and the lower low refractive index layer 252, the stacked structure 250 is also advantageous for adjusting the optical performance of the first infrared barrier layer 200. For example, the stacked structure 250 can appropriately increase the visible light transmittance and further reduce the visible light reflectance of the combined window glass 1000 for in-vehicle light with a high incident angle. Thereby, the stacked structure 250 also helps to avoid visual interference caused by specular reflection of passengers and objects inside the vehicle.

[0050] The stacked structure 250 may be added to the first infrared barrier layer 200 in other examples. As a specific example, the first infrared barrier layer 200 may include a lower high refractive index layer 251, a lower low refractive index layer 252, a transparent conductive oxide layer 210, a first absorption layer 220, a first low refractive index layer 230, a second absorption layer 221, and a second low refractive index layer 240 that are sequentially stacked on the fourth surface 132.

[0051] The number of the stacked structures 250 is at least one. In FIG. 5, an example is given where the number of the stacked structures 250 is one. That is, the stacked structure 250 is the lower high refractive index layer 251 / the lower low refractive index layer 252. In other embodiments, the number of the stacked structures 250 may be two, three, five, etc. For example, when the number of the stacked structures 250 is two, the stacked structure 250 is the lower high refractive index layer 251 / the lower low refractive index layer 252 / the lower high refractive index layer 251 / the lower low refractive index layer 252.

[0052] The refractive index of the lower high refractive index layer 251 is 1.9 or more. In some specific embodiments, the material of the lower high refractive index layer 251 is a nitride, oxide or oxynitride of at least one element among Zn, Sn, Ti, Si, Al, Ni, Cr, Nb, Mg, Zr, Ga, Y, In, Sb, V, Ta. In some embodiments, the thickness of the lower high refractive index layer 251 is 10 nm to 150 nm, and in some other embodiments, the thickness of the lower high refractive index layer 251 is 20 nm to 120 nm. The refractive index of the lower low refractive index layer 252 is less than 1.9. In some specific embodiments, the material of the lower low refractive index layer 252 is an oxide containing one or more of the elements such as Al, Mg, Zn, Si, Zr, Sn, Ca, V. In some embodiments, the thickness of the lower low refractive index layer 252 is 10 nm to 150 nm. In some other embodiments, the thickness of the lower low refractive index layer 252 is 20 nm to 130 nm. As can be understood, the lower low refractive index layer 252 may have a single-layer structure or a multi-layer structure.

[0053] Referring to FIG. 6, FIG. 6 is a diagram showing the structure in the fourth example of the first infrared barrier layer 200 of the combined window glass 1000 shown in FIG. 2.

[0054] The difference between the first infrared barrier layer 200 in this example and the first infrared barrier layer 200 in the first example is that the first infrared barrier layer 200 in this example further includes the outermost high refractive index layer 260. The outermost high refractive index layer 260 is disposed on the surface of the first low refractive index layer 230 far from the first absorption layer 220 and is farther from the fourth surface 132 than the first low refractive index layer 230. That is, the outermost high refractive index layer 260 is the layer farthest from the fourth surface 132 in the first infrared barrier layer 200.

[0055] By providing the outermost high refractive index layer 260, the inner visible light reflectance of the mating window glass 1000 can be further reduced with respect to in-vehicle light at a certain angle, which is more advantageous for avoiding visual interference caused by specular reflection of people and objects inside the vehicle. The first infrared barrier layer 200 in the fourth example includes a transparent conductive oxide layer 210, a first absorption layer 220, a first low refractive index layer 230, and an outermost high refractive index layer 260, which are sequentially laminated on the fourth surface 132. The thickness of the first low refractive index layer 230 is greater than the thickness of the outermost high refractive index layer 260. As can be understood, the outermost high refractive index layer 260 may be added to the first infrared barrier layer 200 in other examples. For example, the first infrared barrier layer 200 can be specifically exemplified as including a lower high refractive index layer 251, a lower low refractive index layer 252, a transparent conductive oxide layer 210, a first absorption layer 220, a first low refractive index layer 230, and an outermost high refractive index layer 260, which are sequentially laminated on the fourth surface 132. Alternatively, for example, the first infrared barrier layer 200 can be specifically exemplified as including a lower high refractive index layer 251, a lower low refractive index layer 252, a transparent conductive oxide layer 210, a first absorption layer 220, a first low refractive index layer 230, a second absorption layer 221, a second low refractive index layer 240, and an outermost high refractive index layer 260, which are sequentially laminated on the fourth surface 132. The thickness of the second low refractive index layer 240 is greater than the thickness of the outermost high refractive index layer 260.

[0056] The refractive index of the outermost high refractive index layer 260 is 1.9 or more. In some specific embodiments, the material of the outermost high refractive index layer 260 is a nitride, oxide, or oxynitride of at least one element among Zn, Sn, Ti, Si, Al, Ni, Cr, Nb, Mg, Zr, Ga, Y, In, Sb, V, Ta. In some embodiments, the thickness of the outermost high refractive index layer 260 is 5 nm to 50 nm. In some other embodiments, the thickness of the outermost high refractive index layer 260 is 10 nm to 30 nm.

[0057] Referring to FIG. 7, FIG. 7 is a diagram showing a cross-sectional structure along the thickness direction of the mating window glass according to the second embodiment of the present application.

[0058] The laminated window glass 1000 includes a laminated glass 100, a first infrared barrier layer 200, and a second infrared barrier layer 300. The difference between the laminated window glass 1000 of the present embodiment and the laminated window glass 1000 in the first embodiment is that the second infrared barrier layer 300 is installed on the second surface 112 of the laminated glass 100.

[0059] The second infrared barrier layer 300 can reflect infrared rays to achieve heat insulation and solar radiation shielding. Due to the combined action of the second infrared barrier layer 300 and the first infrared barrier layer 200, the laminated window glass 1000 has better heat insulation performance and can achieve a lower solar heat gain coefficient Tts. The solar heat gain coefficient Tts is preferably 20% or less, more preferably 16% or less, and even more preferably 13% or less, which can greatly improve the thermal comfort inside the vehicle. As can be understood, in other embodiments, the second infrared barrier layer 300 may be installed on the third surface 131 of the laminated glass 100. That is, the laminated window glass 1000 includes an outer glass plate 110 / adhesive layer 120 / second infrared barrier layer 300 / inner glass plate 130 / first infrared barrier layer 200. Or, the second infrared barrier layer 300 may be installed in the adhesive layer 120. That is, the laminated window glass 1000 includes an outer glass plate 110 / adhesive layer 120 / second infrared barrier layer 300 / inner glass plate 130 / first infrared barrier layer 200, or an outer glass plate 110 / second infrared barrier layer 300 / adhesive layer 120 / inner glass plate 130 / first infrared barrier layer 200. Or, the second infrared barrier layer 300 may be installed in the adhesive layer 120. That is, the laminated window glass 1000 includes an outer glass plate 110 / adhesive layer 120 / second infrared barrier layer 300 / adhesive layer 120 / inner glass plate 130 / first infrared barrier layer 200.

[0060] The visible light transmittance of the outer glass plate 110 is 70% or more, preferably 80% or more. Specifically, transparent glass (ordinary clear glass), ultra-clear glass (ultra-clear glass), etc. can be selected. In the present embodiment, since the second infrared barrier layer 300 is installed between the outer glass plate 110 and the inner glass plate 130, it is advantageous that transparent glass or ultra-clear glass is used as the outer glass plate 110 in that as much infrared light as possible reaches the second infrared barrier layer 300 and is reflected by the second infrared barrier layer 300, and also advantageous that as little infrared light as possible is absorbed by the outer glass plate 110. By these means, it is possible to avoid the generation of re-radiation from the laminated glass 1000 due to the laminated glass 1000 absorbing excessive heat.

[0061] The second infrared barrier layer 300 includes at least one metal layer and at least two dielectric layers, and each metal layer is installed between two adjacent dielectric layers. The second infrared barrier layer 300 may include one metal layer, or may include two metal layers, three metal layers, four metal layers, or even more metal layers. In the present application, the meaning of "a plurality" is two or more. The dielectric layer is used on the one hand to protect the metal layer from oxidation, and on the other hand, can adjust the optical performance, mechanical performance, reflection color, etc. of the second infrared barrier layer 300.

[0062] In some specific embodiments, the material of the metal layer may be a metal or metal alloy of at least one element of Ag, Au, Cu, Al, Pt. Examples thereof include the second infrared barrier layer 300 including one silver layer, the second infrared barrier layer 300 including two silver layers, the second infrared barrier layer 300 including three silver layers, and the second infrared barrier layer 300 including four silver layers.

[0063] In some specific embodiments, the second infrared barrier layer 300 further includes at least one NiCr absorption layer, and the thickness of the NiCr absorption layer is 3 nm or more.

[0064] In some specific embodiments, the material of the medium layer may be at least one of nitrides, oxides, and oxynitrides of Group A elements. The Group A elements are at least one of Zn, Sn, Ti, Si, Al, Ni, Cr, Nb, Mg, Zr, Ga, Y, In, Sb, V, Ta. As the material of the medium layer, ZnSnO x , TiO x , AZO (aluminum-doped zinc oxide), SiN x and the like can be exemplified.

[0065] Examples

[0066] Hereinafter, some examples of the present application will be given for further explanation, but the present application is not limited to the following examples.

[0067] For ease of understanding, first, technical terms related to the examples of the present application will be explained.

[0068] ZnSnO x , SiN x , SiO x In chemical formulas such as, the value of x can be determined by depositing in a stoichiometric, sub-stoichiometric, or super-stoichiometric manner in a magnetron sputtering process.

[0069] Thickness: Physical thickness.

[0070] Refractive index: The refractive index of transmitted light with a wavelength of 550 nm.

[0071] Angle of incidence: The angle between the light and the surface normal at the incident position when the light is incident on the alignment window glass.

[0072] Measurement from the inner glass plate: It is a measurement of the light incident on the alignment window glass 1000 from the inner glass plate side, and is the same as the measurement of the light incident on the alignment window glass 1000 from the inside of the vehicle after the alignment window glass 1000 is attached to the vehicle.

[0073] Examples 1-2 and Comparative Examples 1-3

[0074] In Examples 1 to 2 and Comparative Examples 1 to 3, the laminated window glass 1000 includes the laminated glass 100. The laminated glass 100 includes an outer glass plate 110, an adhesive layer 120, and an inner glass plate 130. The outer glass plate 110 is a transparent glass (visible light transmittance ≥ 80%) having a thickness of 2.1 mm, the adhesive layer 120 is a transparent PVB (visible light transmittance ≥ 80%) having a thickness of 0.76 mm, and the inner glass plate 130 is a gray glass (visible light transmittance ≤ 30%) having a thickness of 2.1 mm.

[0075] The laminated window glass 1000 in Example 1 includes the first infrared barrier layer 200 and does not include the second infrared barrier layer 300.

[0076] The first infrared barrier layer 200 is ZnSnO x (26 nm) / ITO(109.4 nm) / NiCr(5 nm) / SiO x (68.1 nm) / NiCr(5.4 nm) / SiO x (36.3 nm) / SiN x (21 nm), which is sequentially laminated on the fourth surface 132. The numbers described in the parentheses here and below mean thickness. The first infrared barrier layer 200 in Example 1 specifically includes a transparent conductive oxide layer (ZnSnO x / ITO), a first absorption layer (NiCr), a first low refractive index layer (SiO x ), a second absorption layer (NiCr), a second low refractive index layer (SiO x ), and an outermost high refractive index layer (SiN x ).

[0077] The laminated window glass 1000 in Example 2 includes the first infrared barrier layer 200 and does not include the second infrared barrier layer 300.

[0078] The first infrared barrier layer 200 is SiZrN x (32.1 nm) / SiO x (35.8 nm) / ITO(80.2 nm) / NiCr(7.1 nm) / SiO x(44.3 nm) / SiZrN x (20.6 nm) is included. The first infrared barrier layer 200 in Example 2 specifically includes a lower high refractive index layer (SiZrN x ), a lower low refractive index layer (SiO x ), a transparent conductive oxide layer (ITO), a first absorption layer (NiCr), a first low refractive index layer (SiO x ) and an outermost high refractive index layer (SiN x ).

[0079] The alignment window glass 1000 in Comparative Example 1 does not include the first infrared barrier layer 200 and the second infrared barrier layer 300.

[0080] The alignment window glass 1000 in Comparative Example 2 includes the second infrared barrier layer 300 and does not include the first infrared barrier layer 200.

[0081] The second infrared barrier layer 300 is sequentially laminated on the second surface 112, ZnSnO x (26.5 nm) / AZO(12.3 nm) / Ag(12 nm) / NiCr(3.3 nm) / AZO(10 nm) / ZnSnO x (69.3 nm) / AZO(9.9 nm) / Ag(10.6 nm) / NiCr(4.5 nm) / AZO(9.6 nm) / ZnSnO x (50.4 nm) / AZO(10 nm) / Ag(11 nm) / AZO(9.9 nm) / ZnSnO x (19.7 nm) / SiN x The second infrared barrier layer 300 includes three silver layers.

[0082] The alignment window glass 1000 in Comparative Example 3 includes the first infrared barrier layer 200 and does not include the second infrared barrier layer 300.

[0083] The first infrared barrier layer 200 is sequentially laminated on the fourth surface 132, Nb2O5(29 nm) / SiO x (31.2 nm) / ITO(215.3 nm) / SiO x (72.9 nm) / NiCr(8.3 nm) / SiOx (53.4 nm) / SiN x (19.5 nm) is included. The difference between the first infrared barrier layer 200 in Comparative Example 3 and the first infrared barrier layer 200 in Examples 1 to 2 is that the transparent conductive oxide layer 210 in Comparative Example 3 is not in direct contact with the first absorption layer 220, and between the transparent conductive oxide layer 210 and the first absorption layer 220, there is further a SiO layer with a thickness of 72.9 nm x installed.

[0084] Prepare the outer glass plate 110, the adhesive layer 120, and the inner glass plate 130 in Examples 1 to 2 and Comparative Examples 1 to 3, and deposit the first infrared barrier layer 200 corresponding to the fourth surface 132 of the inner glass plate 130 by a magnetron sputtering process, and then process and manufacture according to the manufacturing process of the vehicle glass to obtain the laminated window glass 1000 in Examples 1 to 2 and Comparative Examples 1 to 3.

[0085] Measure and calculate the visible light transmittance TL, the solar heat gain coefficient Tts, the emissivity e, and the inner visible light reflectance RLint of the laminated window glass 1000 in Examples 1 to 2 and Comparative Examples 1 to 3.

[0086] Visible light transmittance TL: Measured and calculated according to the standard ISO9050.

[0087] Solar heat gain coefficient Tts: Measured and calculated according to the standard ISO9050.

[0088] Emissivity e: Measured from the side of the inner glass plate with a Fourier transform infrared spectrophotometer, calculated and calibrated according to the standard EN12898.

[0089] Inner visible light reflectance RLint: Measured from the side of the inner glass plate, and the reflectance of the laminated window glass 1000 for each visible light with incident angles of 0°, 20°, 40°, 60°, and 70° is calculated according to the standard ISO9050.

[0090] The measurement results of Examples 1 to 2 and Comparative Examples 1 to 3 are shown in Table 1.

[0091]

Table 1

[0092] As can be seen from Table 1, the laminated window glass 1000 provided by Comparative Example 1 does not include the first infrared barrier layer 200 and the second infrared barrier layer 300. For the laminated window glass 1000, the visible light transmittance TL is greater than 25%, the solar heat gain coefficient Tts is greater than 40%, the emissivity e is greater than 0.5, and when the incident angles are 0°, 20°, 40°, 60°, and 70°, the inner visible light reflectance RLint is greater than 4%, greater than 4%, greater than 4%, greater than 8%, and greater than 16% respectively. Thus, the laminated window glass 1000 provided by Comparative Example 1 cannot meet the comprehensive requirements such as good heat insulation performance, good low-emissivity performance, low visible light transmittance, and relatively low visible light reflectance for the in-vehicle light within the incident angle range of 0° to 70°.

[0093] The laminated window glass 1000 provided by Comparative Example 2 includes only the second infrared barrier layer 300 and does not include the first infrared barrier layer 200. For the laminated window glass 1000, the emissivity e is greater than 0.5, and when the incident angles are 0°, 20°, 40°, 60°, and 70°, the inner visible light reflectance RLint is greater than 4%, greater than 4%, greater than 4%, greater than 8%, and greater than 16% respectively. Thus, the laminated window glass 1000 provided by Comparative Example 2 cannot meet the comprehensive requirements such as good low-emissivity performance and relatively low visible light reflectance for the in-vehicle light within the incident angle range of 0° to 70°.

[0094] The laminated window glass 1000 provided by Comparative Example 3 includes a first infrared barrier layer 200. However, since the transparent conductive oxide layer 210 of the laminated window glass 1000 is not in direct contact with the first absorption layer 220, the inner visible light reflectance RLint when the incident angle is 0°, 20°, and 40° is all greater than 4%. Thus, the laminated window glass 1000 provided by Comparative Example 3 cannot satisfy the requirement of having a relatively low visible light reflectance for the in-vehicle light within the incident angle range of 0° to 40°.

[0095] The laminated window glass 1000 provided by Example 1 includes a first infrared barrier layer 200. The visible light transmittance TL of the laminated window glass 1000 is 10% or less, the solar heat gain coefficient Tts is 25% or less, the emissivity e is 0.25 or less, and the inner visible light reflectance RLint when the incident angle is 0°, 20°, 40°, 60°, and 70° is 3% or less, 2% or less, 2% or less, 6% or less, and 15% or less, respectively. Thus, the laminated window glass 1000 provided by Example 1 can satisfy the comprehensive requirements such as good heat insulation performance, good low-emission performance, low visible light transmittance, and relatively low reflectance for the in-vehicle light within the incident angle range of 0° to 70°.

[0096] The laminated window glass 1000 provided by Example 2 includes a first infrared barrier layer 200. The visible light transmittance TL of the laminated window glass 1000 is 15% or less, the solar heat gain coefficient Tts is 30% or less, the emissivity e is 0.35 to 0.5, and the inner visible light reflectance RLint when the incident angle is 0°, 20°, 40°, 60°, and 70° is 3% or less, 2% or less, 2% or less, 6% or less, and 15% or less, respectively. Thus, the laminated window glass 1000 provided by Example 2 can satisfy the comprehensive requirements such as good heat insulation performance, good low-emission performance, low visible light transmittance, and relatively low visible light reflectance for the in-vehicle light within the incident angle range of 0° to 70°.

[0097] The difference between the visible light transmittance of the laminated window glass 1000 provided with the first infrared barrier layer 200 according to Examples 1 to 2 and the visible light transmittance of the laminated window glass 1000 without the first infrared barrier layer 200 provided according to Comparative Example 1 is 10% or more, and further 20% or more. By installing the first infrared barrier layer 200 in the present application, the visible light transmittance of the laminated window glass 1000 can be significantly reduced. Therefore, it is not necessary to use more expensive deep-color PVB, and thus the manufacturing cost can be reduced.

[0098] Examples 3 to 7

[0099] The laminated window glass 1000 in Examples 3 to 7 includes a laminated glass 100, a first infrared barrier layer 200, and a second infrared barrier layer 300. The laminated glass 100 includes an outer glass plate 110, an adhesive layer 120, and an inner glass plate 130. The outer glass plate 110 is a transparent glass (visible light transmittance ≥ 80%) having a thickness of 2.1 mm, the adhesive layer 120 is a transparent PVB (visible light transmittance ≥ 80%) having a thickness of 0.76 mm, and the inner glass plate 130 is a gray glass (visible light transmittance ≤ 30%) having a thickness of 2.1 mm. The first infrared barrier layer 200 is installed on the fourth surface 132 of the inner glass plate 130, and the second infrared barrier layer 300 is installed on the second surface 112 of the outer glass plate 110.

[0100] Example 3:

[0101] The first infrared barrier layer 200 is Nb2O5 (29 nm) / SiO x (31.2 nm) / ITO (215.3 nm) / NiCr (5.8 nm) / SiO x (53.4 nm) / SiN x sequentially laminated on the fourth surface 132 and includes (19.5 nm).

[0102] The second infrared barrier layer 300 is ZnSnO x (25.3 nm) / AZO (12.3 nm) / Ag (10.8 nm) / AZO (10 nm) / ZnSnOx (23.5 nm) / SiN x (14.6 nm) is included. The second infrared barrier layer 300 includes one silver layer.

[0103] Example 4:

[0104] The first infrared barrier layer 200 is TiO x (34.7 nm) / SiO x (31.2 nm) / ITO(226.7 nm) / NiCr(6.4 nm) / SiO x (52.7 nm) / SiN x (18.9 nm) is included.

[0105] The second infrared barrier layer 300 is ZnSnO x (25.3 nm) / AZO(12.3 nm) / Ag(12.3 nm) / AZO(10 nm) / ZnSnO x (63.5 nm) / AZO(9.9 nm) / Ag(13.1 nm) / AZO(9.7 nm) / ZnSnO x (23.5 nm) / SiN x (14.6 nm) is included. The second infrared barrier layer 300 includes two silver layers.

[0106] Example 5:

[0107] The first infrared barrier layer 200 is TiO2(29 nm) / SiO x (28.6 nm) / ITO(218.5 nm) / NiCr(5.8 nm) / SiO x (46.6 nm) / SiZrAlN x (19.7 nm) is included.

[0108] The second infrared barrier layer 300 is ZnSnO x (25.3 nm) / AZO(12.3 nm) / Ag(12.3 nm) / AZO(10 nm) / ZnSnO x(63.5 nm) / AZO(9.9 nm) / Ag(14.5 nm) / AZO(9.7 nm) / ZnSnO x (53.4 nm) / AZO(9.3 nm) / Ag(12.6 nm) / AZO(9.7 nm) / ZnSnO x (23.5 nm) / SiN x (14.6 nm) is included. The second infrared barrier layer 300 includes three silver layers.

[0109] Example 6:

[0110] The first infrared barrier layer 200 is sequentially laminated on the fourth surface 132 with Nb2O5(29 nm) / SiO x (31.2 nm) / ITO(215.3 nm) / NiCr(5.8 nm) / SiO x (53.4 nm) / SiN x (19.5 nm) is included.

[0111] The second infrared barrier layer 300 is sequentially laminated on the second surface 112 with ZnSnO x (25.3 nm) / AZO(12.3 nm) / Ag(14.2 nm) / AZO(10 nm) / ZnSnO x (62.2 nm) / AZO(9.9 nm) / Ag(13.7 nm) / AZO(9.8 nm) / ZnSnO x (58.4 nm) / AZO(9.8 nm) / Ag(12.5 nm) / AZO(9.7 nm) / ZnSnO x (23.5 nm) / SiN x (14.6 nm) is included. The second infrared barrier layer 300 includes three silver layers.

[0112] Example 7:

[0113] The first infrared barrier layer 200 is sequentially laminated on the fourth surface 132 with ZnSnO x (26 nm) / ITO(109.4 nm) / NiCr(5 nm) / SiO x (68.1 nm) / NiCr(5.4 nm) / SiO x (36.3 nm) / SiN x (21 nm) is included.

[0114] The second infrared barrier layer 300 is sequentially laminated on the second surface 112, ZnSnO x (25.3 nm) / AZO (12.3 nm) / Ag (13.2 nm) / AZO (10 nm) / ZnSnO x (63 nm) / AZO (9.9 nm) / Ag (13.7 nm) / AZO (9.7 nm) / ZnSnO x (56.4 nm) / AZO (9.3 nm) / Ag (12.8 nm) / AZO (9.3 nm) / ZnSnO x (23 nm) / SiN x (11.9 nm). The second infrared barrier layer 300 includes three silver layers.

[0115] Prepare the outer glass plate 110, the adhesive layer 120, and the inner glass plate 130 in Examples 3 to 7, and deposit the first infrared barrier layer 200 corresponding to the fourth surface 132 of the inner glass plate 130 and the second infrared barrier layer 300 corresponding to the second surface 112 of the outer glass plate 110 by a magnetron sputtering process, and then process and manufacture according to the manufacturing process of the vehicle glass to obtain the laminated window glass 1000 in Examples 3 to 7.

[0116] Measure and calculate the visible light transmittance TL, solar transmittance TE, solar heat gain factor Tts, emissivity e, inner visible light reflectance RLint, transmittance index A of the laminated window glass 1000 in Examples 3 to 7, and the visible light transmittance TL1 of the inner glass plate 130 on which the first infrared barrier layer 200 is deposited.

[0117] Visible light transmittance TL: The visible light transmittance of the laminated window glass 1000 is measured and calculated according to the standard ISO9050.

[0118] Visible light transmittance TL1: The total visible light transmittance of the inner glass plate 130 and the first infrared barrier layer 200 is measured and calculated according to the standard ISO9050.

[0119] Solar transmittance TE: The solar transmittance of the laminated window glass 1000 is measured and calculated according to the standard ISO9050.

[0120] It is calculated according to the formula of index A: A = TL / (TE * TL1).

[0121] Solar heat gain factor Tts: The solar heat gain factor of the laminated window glass 1000 is measured and calculated according to the standard ISO9050.

[0122] Emissivity e: It is measured from the inner glass plate with a Fourier transform infrared spectrophotometer and calculated and calibrated according to the standard EN12898.

[0123] Inner visible light reflectance RLint: Measured from the inner glass plate, and the reflectance of the laminated window glass 1000 for each visible light with incident angles of 0°, 20°, 40°, 60°, and 70° is calculated according to the standard ISO9050.

[0124] The measurement results of Examples 3 to 7 are shown in Table 2.

[0125]

Table 2

[0126] As can be seen from Table 2, the laminated window glass 1000 provided by Examples 3 to 7 includes a first infrared barrier layer 200 and a second infrared barrier layer 300. The visible light transmittance TL of the laminated window glass 1000 is 12% or less, further 6% or less, the solar heat gain factor Tts is 20% or less, further 15% or less, the emissivity e is 0.25 or less, further 0.20 or less, and the inner visible light reflectance RLint when the incident angles are 0°, 20°, 40°, 60°, and 70° is 4% or less, 3% or less, 3% or less, 6% or less, and 15% or less, respectively. Thus, the laminated window glass 1000 provided by Examples 3 to 7 can meet the comprehensive requirements such as good heat insulation performance, good low-emission performance, low visible light transmittance, and relatively low visible light reflectance for in-vehicle light within the incident angle range of 0° to 70°.

[0127] Compared with Example 3 which includes only one silver layer, the solar heat gain coefficient Tts of the laminated window glass 1000 provided by Examples 4 to 7 which include two silver layers or three silver layers is clearly 15% or less, and further becomes 13%, having better heat insulation performance.

[0128] The laminated window glass 1000 provided by Examples 3 to 7 includes a first infrared barrier layer 200 and a second infrared barrier layer 300. Since the transmittance index A of the laminated window glass 1000 is greater than 8, the laminated window glass 1000 can meet comprehensive requirements such as good heat insulation performance, low visible light transmittance, and relatively low visible light reflectance for in-vehicle light within the incident angle range of 0° to 70°. Preferably, the transmittance index A of the laminated window glass 1000 is 10 or more, more preferably 15 or more, still more preferably 20 or more, and further 30 or more.

[0129] Examples 8 - 11

[0130] The laminated window glass 1000 in Examples 8 to 11 includes a laminated glass 100, a first infrared barrier layer 200, and a second infrared barrier layer 300. The laminated glass 100 includes an outer glass plate 110, an adhesive layer 120, and an inner glass plate 130. The outer glass plate 110 is a transparent glass (visible light transmittance ≥ 80%) having a thickness of 2.1 mm, the adhesive layer 120 is a transparent PVB (visible light transmittance ≥ 80%) having a thickness of 0.76 mm, and the inner glass plate 130 is a gray glass (visible light transmittance ≤ 30%) having a thickness of 2.1 mm. The first infrared barrier layer 200 is installed on the fourth surface 132 of the inner glass plate 130, and the second infrared barrier layer 300 is installed on the second surface 112 of the outer glass plate 110.

[0131] Example 8:

[0132] The first infrared barrier layer 200 is TiO x (51.1 nm) / SiO x (30.3 nm) / ITO(70.2 nm) / NiCr(7.3 nm) / SiO x(108.8 nm) is included.

[0133] The second infrared barrier layer 300 is sequentially laminated on the second surface 112, ZnSnO x (30 nm) / AZO(10 nm) / Ag(12 nm) / AZO(11 nm) / ZnSnO x (61.3 nm) / AZO(9.9 nm) / Ag(12.6 nm) / AZO(9.6 nm) / ZnSnO x (57.4 nm) / AZO(9.7 nm) / Ag(11 nm) / AZO(9.7 nm) / ZnSnO x (23.5 nm) / SiN x (14.6 nm) is included. The second infrared barrier layer 300 includes three silver layers.

[0134] Example 9:

[0135] The first infrared barrier layer 200 is sequentially laminated on the fourth surface 132, SiZrN x (32.1 nm) / SiO x (35.8 nm) / ITO(80.2 nm) / NiCr(7.1 nm) / SiO x (44.3 nm) / SiZrN x (20.6 nm) is included.

[0136] The second infrared barrier layer 300 is sequentially laminated on the second surface 112, ZnSnO x (25.3 nm) / AZO(12.3 nm) / Ag(12.3 nm) / AZO(10 nm) / ZnSnO x (63.5 nm) / AZO(9.9 nm) / Ag(14.5 nm) / AZO(9.7 nm) / ZnSnO x (53.5 nm) / AZO(9.3 nm) / Ag(12.6 nm) / AZO(9.7 nm) / ZnSnO x (23.5 nm) / SiN x (14.6 nm) is included. The second infrared barrier layer 300 includes three silver layers.

[0137] Example 10:

[0138] The first infrared barrier layer 200 is sequentially laminated on the fourth surface 132, ZnSnO x (161.8 nm) / NiCr(6.4 nm) / SiO x (48.9 nm) / SiN x (18.5 nm).

[0139] The second infrared barrier layer 300 is sequentially laminated on the second surface 112, ZnSnO x (26.5 nm) / AZO(12.3 nm) / Ag(12 nm) / NiCr(3.3 nm) / AZO(10 nm) / ZnSnO x (69.3 nm) / AZO(9.9 nm) / Ag(10.6 nm) / NiCr(4.5 nm) / AZO(9.6 nm) / ZnSnO x (50.4 nm) / AZO(10 nm) / Ag(11 nm) / AZO(9.9 nm) / ZnSnO x (19.7 nm) / SiN x (14.6 nm). The second infrared barrier layer 300 includes three silver layers.

[0140] Example 11:

[0141] The first infrared barrier layer 200 is sequentially laminated on the fourth surface 132, HAZO(148.9 nm) / NiCr(4.9 nm) / SiO x (48.9 nm) / SiN x (18.5 nm).

[0142] The second infrared barrier layer 300 is sequentially laminated on the second surface 112, ZnSnO x (26.5 nm) / AZO(12.3 nm) / Ag(12.8 nm) / NiCr(3.9 nm) / AZO(11.2 nm) / ZnSnO x (66.2 nm) / AZO(9.9 nm) / Ag(12.4 nm) / NiCr(4.5 nm) / AZO(9.9 nm) / ZnSnO x (22.1 nm) / SiN x (14.6 nm). The second infrared barrier layer 300 includes two silver layers.

[0143] Prepare the outer glass plate 110, the adhesive layer 120, and the inner glass plate 130 in Examples 8 to 11. By means of a magnetron sputtering process, deposit a first infrared barrier layer 200 corresponding to the fourth surface 132 of the inner glass plate 130, deposit a second infrared barrier layer 300 corresponding to the second surface 112 of the outer glass plate 110, and then process and manufacture according to the manufacturing process of vehicle glass to obtain the laminated window glass 1000 in Examples 8 to 11.

[0144] Measure and calculate the visible light transmittance TL, solar energy transmittance TE, solar heat gain factor Tts, emissivity e, inner visible light reflectance RLint, transmittance index A of the laminated window glass 1000 in Examples 8 to 11, and the visible light transmittance TL1 of the inner glass plate 130 on which the first infrared barrier layer 200 is deposited.

[0145] Visible light transmittance TL: The visible light transmittance of the laminated window glass 1000 is measured and calculated according to the standard ISO9050.

[0146] Visible light transmittance TL1: The total visible light transmittance of the inner glass plate 130 and the first infrared barrier layer 200 is measured and calculated according to the standard ISO9050.

[0147] Solar energy transmittance TE: The solar energy transmittance of the laminated window glass 1000 is measured and calculated according to the standard ISO9050.

[0148] Transmittance index A: It is calculated according to the formula A = TL / (TE * TL1).

[0149] Solar heat gain factor Tts: The solar heat gain factor of the laminated window glass 1000 is measured and calculated according to the standard ISO9050.

[0150] Emissivity e: It is measured from the side of the inner glass plate with a Fourier transform infrared spectrophotometer and calculated and calibrated according to the standard EN12898.

[0151] Inner visible light reflectance RLint: Measured from the side of the inner glass plate, the reflectance of the laminated window glass 1000 for each visible light with incident angles of 0°, 20°, 40°, 60°, and 70° is calculated according to the standard ISO9050.

[0152] The measurement results of Examples 8 to 11 are shown in Table 3.

[0153]

Table 3

[0154] As can be seen from Table 3, the laminated window glass 1000 provided by Examples 8 to 11 includes a first infrared barrier layer 200 and a second infrared barrier layer 300. The visible light transmittance TL of the laminated window glass 1000 is 12% or less, the solar heat gain coefficient Tts is 16% or less, the emissivity e is 0.35 to 0.5, and the inner visible light reflectance RLint when the incident angles are 0°, 20°, 40°, 60°, and 70° is 4% or less, 3% or less, 3% or less, 6% or less, and 15% or less, respectively. Thus, the laminated window glass 1000 provided by Examples 8 to 11 can meet the comprehensive requirements such as good heat insulation performance, good low-emissivity performance, low visible light transmittance, and relatively low visible light reflectance for the in-vehicle light within the incident angle range of 0° to 70°.

[0155] Compared with Examples 8 to 9, by additionally installing two NiCr absorption layers in the second infrared barrier layer 300 of the laminated window glass 1000 provided by Examples 10 to 11, the visible light transmittance of the laminated window glass 1000 provided by Examples 10 to 11 and the visible light reflectance for the in-vehicle light within the incident angle range of 0° to 40° are reduced. Thereby, the visible light transmittance TL of the laminated window glass 1000 is 10% or less, and the inner visible light reflectance RLint when the incident angles are 0°, 20°, and 40° are all 2% or less and further 1% or less.

[0156] The laminated window glass 1000 provided by Examples 8 to 11 includes a first infrared barrier layer 200 and a second infrared barrier layer 300. Since the transmittance index A of the laminated window glass 1000 is greater than 8, the laminated window glass 1000 can meet comprehensive requirements such as good heat insulation performance, low visible light transmittance, and relatively low visible light reflectance for in-vehicle light within an incident angle range of 0° to 70°. The transmittance index A of the laminated window glass 1000 is preferably 10 or more, and more preferably 15 or more.

[0157] The above content specifically describes the laminated window glass in this application. However, since this application is not limited to the specific embodiments described above, improvements, equivalent changes, substitutions, etc. based on the technical points of this application are all within the protection scope of this application.

Claims

1. A laminated window glass, comprising: an outer glass plate, an adhesive layer, an inner glass plate, and a first infrared barrier layer, wherein the outer glass plate includes a first surface and a second surface disposed opposite to each other, the inner glass plate includes a third surface and a fourth surface disposed opposite to each other, the adhesive layer is disposed between the second surface and the third surface, the first infrared barrier layer is disposed on the fourth surface, when the incident angle θ of visible light satisfies 60° < θ ≤ 70°, the inner visible light reflectance of the laminated window glass is 16% or less, characterized in that it is a laminated window glass.

2. When the incident angle θ of visible light satisfies 40° < θ ≤ 60°, the inner visible light reflectance of the laminated window glass is 8% or less, characterized in that it is the laminated window glass according to Claim 1.

3. When the incident angle θ of visible light satisfies 0° ≤ θ ≤ 40°, the inner visible light reflectance of the laminated window glass is 4% or less, characterized in that it is the laminated window glass according to Claim 1.

4. The visible light transmittance of the laminated window glass is 16% or less, the visible light transmittance of the outer glass plate is 70% or more, and the visible light transmittance of the inner glass plate is 10% to 50%, characterized in that it is the laminated window glass according to Claim 1.

5. The adhesive layer is a thermoplastic polymer layer having a visible light transmittance of 70% or more, characterized in that it is the laminated window glass according to Claim 4.

6. The first infrared barrier layer includes a transparent conductive oxide (TCO) layer, a first absorption layer, and a first low refractive index layer sequentially laminated on the fourth surface, and the refractive index of the first low refractive index layer is less than 1.9, characterized in that it is the laminated window glass according to Claim 1.

7. The material of the transparent conductive oxide layer is at least one of ITO, NiCrO ｘ , FTO, ZnSnO ｘ , doped zinc oxide, and the doping element of the doped zinc oxide is at least one of aluminum, tungsten, hafnium, gallium, yttrium, niobium, neodymium characterized in that it is the laminated window glass according to Claim 6.

8. The material of the first absorption layer is at least one of NiCr, NiAl, NiSi, Cr, TiN, NbN, MoTi, characterized in that it is the laminated window glass according to Claim 6.

9. The thickness of the transparent conductive oxide layer is 50 nm to 300 nm, the thickness of the first absorption layer is 2 nm to 30 nm, and the thickness of the first low refractive index layer is 10 nm to 300 nm, characterized in that it is the laminated window glass according to Claim 6.

10. The first absorption layer is in direct contact with the transparent conductive oxide layer, and the first low refractive index layer is in direct contact with the first absorption layer, characterized in that it is the laminated window glass according to Claim 6.

11. The first infrared barrier layer further includes a second absorption layer and a second low refractive index layer. The second absorption layer is disposed between the first low refractive index layer and the second low refractive index layer. The second low refractive index layer is farther from the fourth surface than the first low refractive index layer. The laminated window glass according to claim 6, characterized in that.

12. The first infrared barrier layer further includes at least one laminated structure. The at least one laminated structure is disposed between the fourth surface and the transparent conductive oxide layer. Each laminated structure includes a lower high refractive index layer and a lower low refractive index layer. The lower high refractive index layer is closer to the fourth surface than the lower low refractive index layer. The refractive index of the lower high refractive index layer is 1.9 or more, and the refractive index of the lower low refractive index layer is less than 1.

9. The laminated window glass according to claim 6, characterized in that.

13. The first infrared barrier layer further includes an outermost high refractive index layer. The outermost high refractive index layer is the layer farthest from the fourth surface in the first infrared barrier layer. The refractive index of the outermost high refractive index layer is 1.9 or more, and the thickness of the outermost high refractive index layer is 5 nm to 50 nm. The laminated window glass according to claim 6 or 11, characterized in that.

14. The thickness of the first low refractive index layer or the thickness of the second low refractive index layer is greater than the thickness of the outermost high refractive index layer. The laminated window glass according to claim 13, characterized in that.

15. The laminated window glass has an emissivity measured from the inner glass plate of 0.35 to 0.

5. The laminated window glass according to claim 1, characterized in that.

16. The laminated window glass has an emissivity measured from the inner glass plate of less than 0.

35. The laminated window glass according to claim 1, characterized in that.

17. The laminated window glass further includes a second infrared barrier layer. The second infrared barrier layer is disposed between the outer glass plate and the inner glass plate. The second infrared barrier layer includes at least one metal layer and at least two dielectric layers. Each metal layer is disposed between two adjacent dielectric layers. The material of the metal layer is a metal or a metal alloy of at least one element among Ag, Au, Cu, Al, and Pt. The laminated window glass according to claim 1, characterized in that.

18. The second infrared barrier layer further includes at least one NiCr absorption layer, and the thickness of the NiCr absorption layer is 3 nm or more. The laminated window glass according to claim 17, characterized in that.

19. The transmission index A of the laminated window glass is greater than 8, and the transmission index A is calculated according to the formula A = TL / (TE * TL1), where TL is the visible light transmittance of the laminated window glass, TE is the solar radiation transmittance of the laminated window glass, and TL1 is the total visible light transmittance of the inner glass plate and the first infrared barrier layer. The laminated window glass according to claim 17, characterized in that.

20. The transmission index A of the laminated window glass is 10 or more. The laminated window glass according to claim 19, characterized in that.

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