Laminated glazing

Abstract

The application provides a laminated window glass, which comprises an outer glass plate, a bonding layer, an inner glass plate and a first infrared barrier layer, the outer glass plate comprises a first surface and a second surface arranged oppositely, the inner glass plate comprises a third surface and a fourth surface arranged oppositely, the bonding layer is arranged between the second surface and the third surface, and the first infrared barrier layer is arranged on the fourth surface; when the visible light incidence angle is 0-70°, the inner visible light reflectivity of the laminated window glass is less than or equal to 16%. The laminated window glass has good heat insulation effect, low visible light transmittance and low visible light reflectivity measured from the inside of the vehicle, so that the passengers and articles in the vehicle can avoid forming obvious reflections on the sunroof glass, and the riding comfort is improved.

Description

Technical Field

[0001] This application relates to the field of glass product technology, and in particular to laminated window glass installed in vehicles. Background Technology

[0002] With the increasing market demand for new energy vehicles, the installation of power battery packs in the chassis of these vehicles has reduced interior height. More and more automakers are seeking to gain more interior height by eliminating the traditional sunroof sunshades. However, without sunshades, sunlight can directly enter the vehicle through the sunroof, especially with panoramic sunroofs or panoramic glass, leading to excessive brightness that interferes with passenger vision, reduces ride comfort, and requires more energy to regulate interior temperature in summer and winter. To overcome these problems, current technology typically uses sunroof glass with low visible light transmittance, such as 16% or less. However, when installed, the low transmittance and high reflectivity of the sunroof glass, measured from the inside of the vehicle, cause significant reflections of passengers and objects on the sunroof, creating a visually disturbing effect, especially for rear passengers. Summary of the Invention

[0003] The purpose of this application is to provide a laminated window glass that has good heat insulation effect, low visible light transmittance and low visible light reflectance measured from the inside of the vehicle, thereby avoiding obvious reflections of passengers and objects inside the vehicle on the sunroof glass and improving the comfort of riding in the vehicle.

[0004] This application provides a laminated window glass, including an outer glass panel, an adhesive layer, an inner glass panel, and a first infrared blocking layer. The outer glass panel includes a first surface and a second surface disposed opposite to each other, and the inner glass panel 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, and the first infrared blocking layer is disposed on the fourth surface.

[0005] When the incident angle of visible light θ is 60°<θ≤70°, the visible light reflectance of the inner side of the laminated window glass is less than or equal to 16%.

[0006] Specifically, when the visible light incident angle θ is 40°<θ≤60°, the visible light reflectivity of the inner side of the laminated window glass is less than or equal to 8%.

[0007] Specifically, when the visible light incident angle is 0°≤θ≤40°, the visible light reflectivity of the inner side of the laminated window glass is less than or equal to 4%.

[0008] Among them, the visible light transmittance of the laminated window glass is less than or equal to 16%, the visible light transmittance of the outer glass panel is greater than or equal to 70%, and the visible light transmittance of the inner glass panel is 10% to 50%.

[0009] The adhesive layer is a thermoplastic polymer layer with a visible light transmittance of 70% or higher.

[0010] The first infrared blocking layer includes a transparent conductive oxide layer, a first absorption layer and a first low refractive index layer sequentially stacked on the fourth surface, wherein the refractive index of the first low refractive index layer is less than 1.9.

[0011] The transparent conductive oxide layer is made of ITO and NiCrO. x FTO, ZnSnO x The zinc oxide is doped with at least one of the following elements: aluminum, tungsten, hafnium, gallium, yttrium, niobium, and neodymium.

[0012] The material of the first absorber layer is selected from at least one of NiCr, NiAl, NiSi, Cr, TiN, NbN, and MoTi.

[0013] The thickness of the transparent conductive oxide layer is 50nm to 300nm, the thickness of the first absorption layer is 2nm to 30nm, and the thickness of the first low refractive index layer is 10nm to 300nm.

[0014] 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.

[0015] The first infrared blocking layer also 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, and the second low refractive index layer is further away from the fourth surface than the first low refractive index layer.

[0016] The first infrared blocking layer further includes at least one stacked structure, which is disposed between the fourth surface and the transparent conductive oxide layer. Each stacked 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 greater than or equal to 1.9, and the refractive index of the lower low refractive index layer is less than 1.9.

[0017] The first infrared blocking layer also includes an outermost high refractive index layer, which is the layer furthest from the fourth surface in the first infrared blocking layer. The refractive index of the outermost high refractive index layer is greater than or equal to 1.9, and the thickness of the outermost high refractive index layer is 5nm to 50nm.

[0018] The thickness of the first low-refractive-index layer or the second low-refractive-index layer is greater than the thickness of the outermost high-refractive-index layer.

[0019] The emissivity of laminated window glass, measured from the inner glass panel side, is 0.35–0.5.

[0020] Specifically, the emissivity of the laminated window glass, measured from the inner glass panel side, is less than 0.35.

[0021] The laminated window glass also includes a second infrared blocking layer, which is disposed between the outer glass plate and the inner glass plate. The second infrared blocking layer includes at least one metal layer and at least two dielectric layers. Each metal layer is located between two adjacent dielectric layers. The material of the metal layer is a metal or metal alloy selected from at least one element selected from Ag, Au, Cu, Al, and Pt.

[0022] The second infrared blocking layer also includes at least one NiCr absorption layer, the thickness of which is greater than or equal to 3 nm.

[0023] Among them, 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 direct solar transmittance of the laminated window glass, and TL1 is the visible light transmittance of the inner glass plate and the first infrared blocking layer together.

[0024] Among them, the transmittance index A of laminated window glass is greater than or equal to 10.

[0025] This application provides a laminated window glass that meets the comprehensive requirements of good heat insulation, good low radiation, low visible light transmittance, and low visible light reflectivity for interior light within the 0° to 70° incident angle range. It has good low-angle and medium-high-angle anti-reflection effects, making it difficult for passengers and objects inside the vehicle to form obvious reflections on the laminated window glass due to mirror reflection. It can reduce or even eliminate visual interference to passengers, especially rear passengers, and improve the thermal comfort, brightness comfort, and visual comfort inside the vehicle. Attached Figure Description

[0026] Figure 1 A schematic diagram of a vehicle equipped with laminated window glass according to an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the cross-sectional structure of a laminated window glass along the thickness direction according to the first embodiment of this application;

[0028] Figure 3 for Figure 2 The diagram shows the structure of the first infrared blocking layer in the laminated window glass in the first example.

[0029] Figure 4 for Figure 2 The diagram shows the structure of the first infrared blocking layer in the laminated window glass in the second example.

[0030] Figure 5 for Figure 2 The diagram shows the structure of the first infrared blocking layer in the laminated window glass in the third example.

[0031] Figure 6 for Figure 2 A schematic diagram of the structure of the first infrared blocking layer in the laminated window glass shown in the fourth example;

[0032] Figure 7 This is a schematic diagram of the cross-sectional structure of a laminated window glass along the thickness direction according to the second embodiment of this application. Detailed Implementation

[0033] The contents of this application will be further explained below with reference to the accompanying drawings.

[0034] See Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1 equipped with a laminated window glass 1000 according to an embodiment of this application is shown.

[0035] Vehicle 1 includes a laminated window glass 1000 and a body 2000. The body 2000 has a body opening 2100, and the laminated window glass 1000 is installed in the body opening 2100 and used as a sunroof. The laminated window glass 1000 can be used as a side window or a sunroof. This embodiment is illustrated as being used as a sunroof.

[0036] For ease of description, let's use Figure 1 The length direction of the laminated window glass 1000 shown is the Y-axis direction, the width direction is the X-axis direction, and the thickness direction is the Z-axis direction, where the positive Z-axis direction is the direction from the outside of the vehicle 1 to the inside.

[0037] The laminated window glass 1000 provided in this embodiment is installed after the vehicle body opening 2100, which can reduce the transmission of infrared, ultraviolet, and visible light into the interior of the vehicle 1, and has a good heat insulation effect and low visible light transmittance, thereby improving the thermal comfort and brightness comfort inside the vehicle. At the same time, the laminated window glass 1000 can also reduce the entry of external heat radiation into the interior of the vehicle 1 in summer and reduce the loss of heat from the interior of the vehicle 1 to the outside in winter, thereby meeting the requirements of energy conservation and environmental protection. In addition, the visible light reflectance of the laminated window glass 1000 measured from the inside of the vehicle is also low, making it difficult for passengers and objects inside the vehicle to form obvious reflections on the sunroof glass due to mirror reflection, which can reduce or even eliminate visual interference to passengers, especially rear passengers, and improve the visual comfort inside the vehicle.

[0038] See Figure 2 , Figure 2 This is a schematic diagram of the cross-sectional structure of a laminated window glass along the thickness direction according to the first embodiment of this application.

[0039] The laminated window glass 1000 includes laminated glass 100 and a first infrared blocking layer 200. The laminated glass 100 includes an outer glass panel 110, an adhesive layer 120, and an inner glass panel 130. The adhesive layer 120 is disposed between the outer glass panel 110 and the inner glass panel 130. The outer glass panel 110 includes a first surface 111 and a second surface 112 disposed opposite to each other. 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 panel 130 includes a third surface 131 and a fourth surface 132 disposed opposite to each other. The third surface 131 is close to the adhesive layer 120, and the fourth surface 132 faces the inside of the vehicle 1. The first infrared blocking layer 200 is disposed on the fourth surface 132. Along the positive Z-axis, light from outside the vehicle passes sequentially through the outer glass panel 110, the adhesive layer 120, the inner glass panel 130, and the first infrared blocking layer 200 into the vehicle interior.

[0040] In this embodiment, the visible light transmittance of the outer glass panel 110 is greater than or equal to 70%, and the visible light transmittance of the inner glass panel 130 is 10% to 50%. Specifically, the inner glass panel 130 can be made of tinted glass such as green glass, gray glass, blue glass, or brown glass. When using tinted glass as the inner glass panel 130, by providing a first infrared blocking layer 200 on the fourth surface 132 of the inner glass panel 130, the laminated window glass 1000 can have a low visible light transmittance, meeting privacy or light-blocking requirements. It also reduces heat radiation from outside the vehicle entering the vehicle 1 in summer and reduces heat loss from inside the vehicle to the outside in winter.

[0041] The adhesive layer 120 is a thermoplastic polymer layer with a visible light transmittance greater than or equal to 70%, used to bond the outer glass panel 110 and the inner glass panel 130 to form a sandwich structure. The material of the adhesive layer 120 can be selected from polyvinyl butyral (PVB), ionic interlayer (SGP), ethylene-vinyl acetate copolymer (EVA), polyurethane (PU), etc., preferably transparent polyvinyl butyral (PVB). In this application, using a thermoplastic polymer layer with a visible light transmittance greater than or equal to 70% can also achieve a visible light transmittance of the laminated window glass 1000 of less than or equal to 16%, preferably less than or equal to 12%, more preferably less than or equal to 10%, or even reaching 1% to 5%, without the need to use a more expensive dark-colored thermoplastic polymer layer, thereby reducing production costs. It is understood that this application can also use a thermoplastic polymer layer with a visible light transmittance of less than 70%, such as gray PVB, as needed to provide a wider range of products.

[0042] When the laminated window glass 1000 provided in this application embodiment is used as a sunroof glass, the first infrared blocking layer 200 disposed on the fourth surface 132 can reduce the emissivity of the laminated window glass 1000 measured from the inside of the vehicle, further reduce the total solar transmittance Tts of the laminated window glass 1000, and also reduce the visible light reflectance of the laminated window glass 1000 measured from the inside of the vehicle. This achieves a low visible light reflectance over a wide range of incident angles, thereby improving the high-angle anti-reflection effect on the light inside the vehicle. This makes it difficult for rear passengers to observe obvious reflections on the sunroof glass, reduces or even eliminates visual interference, and improves the visual comfort inside the vehicle.

[0043] The laminated window glass 1000 provided in this application embodiment can ensure a low-angle anti-reflection effect. When visible light is incident on the laminated window glass 1000 with an incident angle θ of 0°≤θ≤40°, the inner visible light reflectance of the laminated window glass 1000 is less than or equal to 4%. The laminated window glass 1000 provided in this application embodiment can also achieve a medium-high angle anti-reflection effect. The laminated window glass 1000 has an inner visible light reflectance of less than or equal to 8% for visible light incident with an incident angle θ of 40°<θ≤60°; further, the laminated window glass 1000 has an inner visible light reflectance of less than or equal to 16% for visible light incident with an incident angle θ of 60°<θ≤70°. Here, the inner visible light reflectance refers to the visible light reflectance when visible light is incident on the laminated window glass 1000 from the inside of the vehicle.

[0044] Please see Figure 3 , Figure 3 for Figure 2 The first infrared blocking layer 200 in the laminated window glass 1000 shown is a schematic diagram of the structure in the first example.

[0045] Along the positive Z-axis, i.e., from the outer glass plate 110 to the inner glass plate 130, the first infrared blocking layer 200 includes a transparent conductive oxide layer 210, a first absorption layer 220, and a first low refractive index layer 230 sequentially stacked on the fourth surface 132. In this 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.

[0046] The emissivity of ordinary laminated glass is typically around 0.9. The function of the transparent conductive oxide layer 210 is to reduce the emissivity of the laminated window glass 1000. Measured from the inside of the vehicle, i.e., from the inner glass panel 130 side, the emissivity of the laminated window glass 1000 is less than or equal to 0.5. In some specific embodiments, the material of the transparent conductive oxide layer 210 is selected from ITO (indium tin oxide) and NiCrO. x , FTO (fluorine-doped tin oxide), ZnSnO x The transparent conductive oxide layer 210 is a single layer, such as an ITO layer, or a multilayer layer. The doping element in the zinc oxide can be at least one of aluminum, tungsten, hafnium, gallium, yttrium, niobium, and neodymium, such as AZO (aluminum-doped zinc oxide) and 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 other embodiments, the thickness of the transparent conductive oxide layer 210 is 60 nm to 280 nm. The transparent conductive oxide layer 210 can be a single layer, such as a single ITO layer, or it can have multiple layers, where "multilayer" refers to two or more layers with different materials for adjacent layers, such as the transparent conductive oxide layer 210 comprising sequentially stacked ZnSnO. x The transparent conductive oxide layer 210 may include sequentially stacked ITO / HAZO layers, or sequentially stacked ZnSnO layers. x The laminated window glass 1000 has an emissivity of 0.35–0.5 measured from the inside of the vehicle, i.e., from the inner glass panel 130 side. This allows for more convenient and lower-cost manufacturing. Examples of emissivity values ​​for the laminated window glass 1000 include 0.36, 0.41, 0.45, and 0.47. In some specific embodiments, the emissivity of the laminated window glass 1000 measured from the inside of the vehicle, i.e., from the inner glass panel 130 side, is less than 0.35, more preferably less than or equal to 0.3, or even less than or equal to 0.25. This achieves better heat insulation and thermal insulation effects. Examples of emissivity values ​​for the laminated window glass 1000 include 0.11, 0.15, 0.16, 0.17, 0.22, and 0.23.

[0047] The first absorption layer 220 serves two purposes: firstly, to further reduce the emissivity of the laminated window glass 1000; and secondly, to reduce the visible light transmittance and visible light reflectance of the laminated window glass 1000. In some specific embodiments, the material of the first absorption layer 220 can be selected from at least one of NiCr, NiAl, NiSi, Cr, TiN, NbN, and MoTi. In some embodiments, the thickness of the first absorption layer 220 is 2 nm to 30 nm. In other embodiments, the thickness of the first absorption layer 220 is 3 nm to 20 nm, specifically examples being 3.5 nm, 4 nm, 5 nm, 6 nm, 7 nm, 8 nm, 9 nm, 10 nm, 11 nm, 15 nm, and 18 nm.

[0048] The first low-refractive-index layer 230 has a refractive index of less than 1.9 and is in direct contact with the first absorption layer 220. Its function is to adjust the optical color of the laminated window glass 1000 and reduce the visible light reflectance at high angles of the interior light within the laminated window glass 1000. In some specific embodiments, the material of the first low-refractive-index layer 230 is selected from oxides composed of one or more elements such as Al, Mg, Zn, Si, Zr, Sn, Ca, and V. In some embodiments, the thickness of the first low-refractive-index layer 230 is 10 nm to 300 nm. In other embodiments, the thickness of the first low-refractive-index layer 230 is 20 nm to 280 nm. It is understood that the first low-refractive-index layer 230 can be a single layer or multiple layers, such as a SiO2 layer / SiAlOx layer.

[0049] In this embodiment, a first infrared blocking layer 200 is formed by sequentially stacking a transparent conductive oxide layer 210, a first absorption layer 220, and a first low refractive index layer 230. On the one hand, this reduces the emissivity of the laminated window glass 1000, and on the other hand, it has a low visible light reflectivity for light within a wide incident angle range inside the vehicle, achieving a high-angle anti-reflection effect on light inside the vehicle and avoiding visual interference caused by mirror reflection of people and objects inside the vehicle.

[0050] See Figure 4 , Figure 4 for Figure 2 The first infrared blocking layer 200 in the laminated window glass 1000 shown is a structural schematic diagram in the second example.

[0051] In this example, the difference between the first infrared blocking layer 200 and the first infrared blocking layer 200 in the first example is that the first infrared blocking layer 200 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 further away from the fourth surface 132 than the first low refractive index layer 230. That is, the first infrared blocking 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 stacked 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 can be selected from at least one of NiCr, NiAl, NiSi, Cr, TiN, NbN, and MoTi.

[0052] The second low-refractive-index layer 240 has a refractive index of less than 1.9. In some specific embodiments, the second low-refractive-index layer 240 is selected from oxides composed of one or more elements such as Al, Mg, Zn, Si, Zr, Sn, Ca, and V. In some embodiments, the thickness of the second low-refractive-index layer 240 is 10 nm to 300 nm. In other embodiments, the thickness of the second low-refractive-index layer 240 is 20 nm to 280 nm. It is understood that the second low-refractive-index layer 240 may also have a single layer or multiple layers.

[0053] In other examples, the first infrared blocking layer 200 may also include more absorption layers, such as a third absorption layer, a fourth absorption layer, etc. Specifically, the first infrared blocking layer 200 including the third absorption layer can be exemplified by comprising, sequentially stacked on the fourth surface 132, 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. Similarly, the first infrared blocking layer 200 including the fourth absorption layer can be exemplified by, sequentially stacked on the fourth surface 132, 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.

[0054] See Figure 5 , Figure 5 for Figure 2 A schematic diagram of the structure of the first infrared blocking layer 200 in the laminated window glass 1000 shown in the third example.

[0055] In this example, the first infrared blocking layer 200 differs from the first infrared blocking layer 200 in the following way: the first infrared blocking layer 200 further includes a stacked structure 250, which is disposed between the inner glass plate 130 and the transparent conductive oxide layer 210. It is understood that the stacked structure 250 can also be added to the first infrared blocking layer 200 in other examples.

[0056] Along the positive Z-axis, the stacked structure 250 includes a lower high refractive index layer 251 and a lower low refractive index layer 252 stacked sequentially. The lower high refractive index layer 251 is directly disposed on the fourth surface 132, and the lower low refractive index layer 252 is disposed between the lower high refractive index layer 251 and the transparent conductive oxide layer 210. That is, the first infrared blocking 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 stacked sequentially on the fourth surface 132. By setting the stacked structure 250, the diffusion of alkali metal ions from the inner glass plate 130 into the first infrared blocking layer 200 can be reduced or prevented, thereby avoiding damage to the performance of the first infrared blocking layer 200 by alkali metal ions. At the same time, through the combined effect of the lower high refractive index layer 251 and the lower low refractive index layer 252, the stacked structure 250 is also beneficial to adjust the optical effect of the first infrared blocking layer 200, such as appropriately increasing the visible light transmittance and further reducing the visible light reflectance of the interior light at the high angle of the laminated window glass 1000, which is more conducive to avoiding visual interference caused by the reflection of people and objects inside the vehicle through the mirror.

[0057] In other examples, a stacked structure 250 can also be added to the first infrared blocking layer 200. Specifically, the first infrared blocking layer 200 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, a first low refractive index layer 230, a second absorption layer 221, and a second low refractive index layer 240, which are sequentially stacked on the fourth surface 132.

[0058] Among them, the number of stacked structures 250 is at least one. Figure 5 In the example, a stacked structure 250 is provided, which is a lower high refractive index layer 251 and a lower low refractive index layer 252. In other embodiments, the number of stacked structures 250 can also be 2, 3, 5, etc. For example, when the number is 2, the stacked structure 250 is a lower high refractive index layer 251 and a lower low refractive index layer 252 and a lower high refractive index layer 251 and a lower low refractive index layer 252.

[0059] The lower high-refractive-index layer 251 has a refractive index greater than or equal to 1.9. In some specific embodiments, the material of the lower high-refractive-index layer 251 is selected from at least one nitride, oxide, or oxynitride of Zn, Sn, Ti, Si, Al, Ni, Cr, Nb, Mg, Zr, Ga, Y, In, Sb, V, and Ta. In some embodiments, the thickness of the lower high-refractive-index layer 251 is 10 nm to 150 nm, and in other embodiments, the thickness is 20 nm to 120 nm. The lower low-refractive-index layer 252 has a refractive index less than 1.9. In some specific embodiments, the material of the lower low-refractive-index layer 252 is selected from one or more oxides composed of elements such as Al, Mg, Zn, Si, Zr, Sn, Ca, and V. In some embodiments, the thickness of the lower low-refractive-index layer 252 is 10 nm to 150 nm. In other embodiments, the thickness of the lower low-refractive-index layer 252 is 20 nm to 130 nm. It is understood that the lower low-refractive-index layer 252 may also have a single layer or multiple layers.

[0060] See Figure 6 , Figure 6 for Figure 2 A schematic diagram of the structure of the first infrared blocking layer 200 in the laminated window glass 1000 shown in the fourth example.

[0061] In this example, the first infrared blocking layer 200 differs from the first infrared blocking layer 200 in the first example in that the first infrared blocking layer 200 further includes an outermost high refractive index layer 260. The outermost high refractive index layer 260 is disposed on the side surface of the first low refractive index layer 230 that is away from the first absorption layer 220. The outermost high refractive index layer 260 is farther away 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 in the first infrared blocking layer 200 that is farthest from the fourth surface 132.

[0062] By setting the outermost high refractive index layer 260, the visible light reflectance of the interior light at certain angles on the inner side of the laminated window glass 1000 can be further reduced, which helps to avoid visual interference caused by people and objects inside the vehicle through mirror reflection. In the fourth example, the first infrared blocking layer 200 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 stacked sequentially 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. It is understood that an outermost high refractive index layer 260 can also be added to the first infrared blocking layer 200 in other examples. For example, the first infrared blocking layer 200 can 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, and an outermost high refractive index layer 260 stacked sequentially on the fourth surface 132; or, for example, the first infrared blocking layer 200 can 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, a second low refractive index layer 240, and an outermost high refractive index layer 260 stacked sequentially on the fourth surface 132, wherein the thickness of the second low refractive index layer 240 is greater than the thickness of the outermost high refractive index layer 260.

[0063] The outermost high refractive index layer 260 has a refractive index greater than or equal to 1.9. In some specific embodiments, the material of the outermost high refractive index layer 260 is selected from at least one nitride, oxide, or oxynitride of Zn, Sn, Ti, Si, Al, Ni, Cr, Nb, Mg, Zr, Ga, Y, In, Sb, V, and Ta. In some embodiments, the thickness of the outermost high refractive index layer 260 is 5 nm to 50 nm, and in other embodiments, the thickness is 10 nm to 30 nm.

[0064] Please see Figure 7 , Figure 7 This is a schematic diagram of the cross-sectional structure of a laminated window glass along the thickness direction according to the second embodiment of this application.

[0065] The laminated window glass 1000 includes laminated glass 100, a first infrared blocking layer 200 and a second infrared blocking layer 300. The difference between the laminated window glass 1000 in the first embodiment is that the second infrared blocking layer 300 is disposed on the second surface 112 of the laminated glass 100.

[0066] The second infrared blocking layer 300 can reflect infrared rays, achieving heat insulation and sun protection effects. The combined effect of the second infrared blocking layer 300 and the first infrared blocking layer 200 enables the laminated window glass 1000 to have better heat insulation effect and achieve a lower total solar transmittance Tts. The total solar transmittance Tts is preferably less than or equal to 20%, more preferably less than or equal to 16%, or even less than or equal to 13%, thereby greatly improving the thermal comfort inside the vehicle. It is understood that in other embodiments, the second infrared blocking layer 300 may also be disposed on the third surface 131 of the laminated glass 100, that is, the laminated window glass 1000 includes an outer glass panel 110 / adhesive layer 120 / second infrared blocking layer 300 / inner glass panel 130 / first infrared blocking layer 200; or disposed on the adhesive layer 120, that is, the laminated window glass 1000 includes an outer glass panel 110 / adhesive layer 120 / second infrared blocking layer 300 / inner glass panel 130 / first infrared blocking layer 200, or includes an outer glass panel 110 / second infrared blocking layer 300 / adhesive layer 120 / inner glass panel 130 / first infrared blocking layer 200; or disposed in the adhesive layer 120, the laminated window glass 1000 includes an outer glass panel 110 / adhesive layer 120 / second infrared blocking layer 300 / adhesive layer 120 / inner glass panel 130 / first infrared blocking layer 200.

[0067] The visible light transmittance of the outer glass panel 110 is greater than or equal to 70%, preferably greater than or equal to 80%, and can be made of transparent glass (ordinary clear glass), ultra-transparent glass (ultra-clear glass), etc. In this embodiment, the second infrared blocking layer 300 is disposed between the outer glass panel 110 and the inner glass panel 130. Using transparent or ultra-transparent glass as the outer glass panel 110 facilitates the arrival of as much infrared light as possible in the second infrared blocking layer 300 and its reflection, and also helps the outer glass panel 110 absorb as little infrared light as possible, thus avoiding secondary radiation caused by excessive heat absorption in the laminated window glass 1000.

[0068] The second infrared blocking layer 300 includes at least one metal layer and at least two dielectric layers, with each metal layer located between two adjacent dielectric layers. The second infrared blocking layer 300 may include one metal layer, or it may include two, three, four, or even more metal layers. In this application, "more than" refers to two or more. The dielectric layers serve two purposes: firstly, to protect the metal layers from oxidation; and secondly, to adjust the optical properties, mechanical properties, and reflected color of the second infrared blocking layer 300.

[0069] In some specific embodiments, the material of the metal layer may be a metal or metal alloy selected from at least one element selected from Ag, Au, Cu, Al, and Pt. Examples include a second infrared blocking layer 300 including one silver layer, a second infrared blocking layer 300 including two silver layers, a second infrared blocking layer 300 including three silver layers, and a second infrared blocking layer 300 including four silver layers.

[0070] In some specific embodiments, the second infrared blocking layer 300 further includes at least one NiCr absorption layer, the thickness of which is greater than or equal to 3 nm.

[0071] In some specific embodiments, the material of the dielectric layer may be at least one selected from nitrides, oxides, and oxynitrides of elements in group A. Specifically, elements in group A are selected from at least one of Zn, Sn, Ti, Si, Al, Ni, Cr, Nb, Mg, Zr, Ga, Y, In, Sb, V, and Ta. Examples of dielectric layers include ZnSnO. x TiO x AZO (aluminum-doped zinc oxide), SiN x wait.

[0072] Example

[0073] The following are some embodiments of this application for further illustration, but the present invention is not limited to the following embodiments.

[0074] For ease of understanding, the terminology used in the embodiments of this application will be explained first.

[0075] ZnSnO x SiN x SiO x The value of x in the chemical formula can be determined based on whether the magnetron sputtering process uses stoichiometry, substoichiometry, or superstoichiometry for deposition.

[0076] Thickness: refers to the physical thickness.

[0077] Refractive index: The refractive index of transmitted light at a wavelength of 550 nm.

[0078] Angle of incidence: The angle between the incident light and the normal to the surface at the incident point when the light strikes the laminated window glass.

[0079] Measurement from the inner glass panel side: The light enters the laminated window glass 1000 from the inner glass panel side for measurement. This is equivalent to the laminated window glass 1000 being installed on the vehicle, with the light entering the laminated window glass 1000 from the inside of the vehicle for measurement.

[0080] Examples 1-2 and Comparative Examples 1-3

[0081] The laminated window glass 1000 in Examples 1-2 and Comparative Examples 1-3 includes laminated glass 100, which includes an outer glass panel 110, an adhesive layer 120, and an inner glass panel 130. The outer glass panel 110 is 2.1 mm thick transparent glass (visible light transmittance ≥ 80%), the adhesive layer 120 is 0.76 mm thick transparent PVB (visible light transmittance ≥ 80%), and the inner glass panel 130 is 2.1 mm thick gray glass (visible light transmittance ≤ 30%).

[0082] Example 1: The laminated window glass 1000 includes a first infrared blocking layer 200 but does not include a second infrared blocking layer 300;

[0083] First infrared blocking layer 200: ZnSnO is sequentially stacked on the fourth surface 132. x (26nm) / ITO(109.4nm) / NiCr(5nm) / SiO x (68.1nm) / NiCr(5.4nm) / SiO x (36.3nm) / SiN x (21nm), where the description in parentheses here and below is the thickness. The first infrared blocking layer 200 of Example 1 specifically includes a transparent conductive oxide layer (ZnSnO). x / ITO), first absorber layer (NiCr), first low refractive index layer (SiO) x ), second absorption layer (NiCr), second low refractive index layer (SiO), x ), outermost high refractive index layer (SiN) x ).

[0084] Example 2: The laminated window glass 1000 includes a first infrared blocking layer 200 but does not include a second infrared blocking layer 300;

[0085] First infrared blocking layer 200: SiZrN is sequentially stacked on the fourth surface 132. x (32.1nm) / SiO x (35.8nm) / ITO(80.2nm) / NiCr(7.1nm) / SiO x (44.3nm) / SiZrN x (20.6nm). The first infrared blocking layer 200 in Example 2 specifically includes an underlying high refractive index layer (SiZrN). x ), the underlying low refractive index layer (SiO) x ), transparent conductive oxide layer (ITO), first absorber layer (NiCr), first low refractive index layer (SiO), x ), outermost high refractive index layer (SiN) x ).

[0086] Comparative Example 1: Laminated window glass 1000 does not include the first infrared blocking layer 200 and the second infrared blocking layer 300.

[0087] Comparative Example 2: The laminated window glass 1000 includes a second infrared blocking layer 300 but does not include a first infrared blocking layer 200;

[0088] Second infrared blocking layer 300: ZnSnO is sequentially stacked on the second surface 112. x (26.5nm) / AZO(12.3nm) / Ag(12nm) / NiCr(3.3nm) / AZO(10nm) / ZnSnO x (69.3nm) / AZO(9.9nm) / Ag(10.6nm) / NiCr(4.5nm) / AZO(9.6nm) / ZnSnO x (50.4nm) / AZO(10nm) / Ag(11nm) / AZO(9.9nm) / ZnSnO x (19.7nm) / SiN x (14.6nm), the second infrared blocking layer 300 includes three silver layers.

[0089] Comparative Example 3: The laminated window glass 1000 includes a first infrared blocking layer 200 but does not include a second infrared blocking layer 300;

[0090] First infrared blocking layer 200: Nb2O5 (29nm) / SiO2 is sequentially stacked on the fourth surface 132. x (31.2nm) / ITO(215.3nm) / SiO x (72.9nm) / NiCr(8.3nm) / SiO x (53.4nm) / SiN x (19.5nm) The difference between the first infrared blocking layer 200 in Comparative Example 3 and the first infrared blocking layer 200 in Examples 1-2 is that the transparent conductive oxide layer 210 and the first absorption layer 220 in Comparative Example 3 are not in direct contact; a 72.9nm thick SiO layer is disposed between them. x layer.

[0091] Prepare the outer glass panel 110, adhesive layer 120, and inner glass panel 130 as in Examples 1-2 and Comparative Example 3. Deposit a corresponding first infrared blocking layer 200 on the fourth surface 132 of the inner glass panel 130 using a magnetron sputtering process. Then, process and manufacture according to vehicle glass manufacturing processes to obtain the laminated window glass 1000 as in Examples 1-2 and Comparative Example 3. Prepare the outer glass panel 110, adhesive layer 120, and inner glass panel 130 as in Comparative Example 1. Then, process and manufacture according to vehicle glass manufacturing processes to obtain the laminated window glass 1000 as in Comparative Example 1. Prepare the outer glass panel 110, adhesive layer 120, and inner glass panel 130 as in Comparative Example 2. Deposit a corresponding second infrared blocking layer 300 on the second surface 112 of the outer glass panel 110 using a magnetron sputtering process. Then, process and manufacture according to vehicle glass manufacturing processes to obtain the laminated window glass 1000 as in Comparative Example 2.

[0092] The visible light transmittance TL, total solar transmittance Tts, emissivity e, and inner visible light reflectance RLint of the laminated window glass 1000 in Examples 1-2 and Comparative Examples 1-3 were measured and calculated.

[0093] Visible light transmittance TL: Calculated according to standard ISO 9050;

[0094] Total solar transmittance (Tts): Calculated according to standard ISO 9050;

[0095] Emissivity e: Measured from the inner glass plate side using a Fourier transform infrared spectrometer and calibrated according to standard EN12898;

[0096] Inner visible light reflectance RLint: Measured from the inner glass side, the reflectance of laminated window glass 1000 to visible light incident at incident angles of 0°, 20°, 40°, 60° and 70°, calculated according to standard ISO9050.

[0097] The measurement results of Examples 1-2 and Comparative Examples 1-3 are included in Table 1.

[0098] Table 1: Measurement results of Examples 1-2 and Comparative Examples 1-3

[0099]

[0100] As can be seen from Table 1, the laminated window glass 1000 provided in Comparative Example 1, excluding the first infrared blocking layer 200 and the second infrared blocking layer 300, has a visible light transmittance TL greater than 25%, a total solar energy transmittance Tts greater than 40%, an emissivity e greater than 0.5, and an inner visible light reflectance RLint greater than 4%, greater than 4%, greater than 4%, greater than 8%, and greater than 16% at incident angles of 0°, 20°, 40°, 60°, and 70°, respectively. Therefore, the laminated window glass 1000 provided in Comparative Example 1 cannot meet the comprehensive requirements of good heat insulation, good low radiation effect, low visible light transmittance, and low visible light reflectance for interior light within the incident angle range of 0° to 70°.

[0101] Comparative Example 2's laminated window glass 1000 only includes the second infrared blocking layer 300, but does not include the first infrared blocking layer 200. Its emissivity e is greater than 0.5, and its inner visible light reflectivity RLint is greater than 4%, greater than 4%, greater than 4%, greater than 8%, and greater than 16% at incident angles of 0°, 20°, 40°, 60°, and 70°, respectively. It can be seen that the laminated window glass 1000 provided in Comparative Example 2 cannot meet the comprehensive requirements of good low-emissivity and low visible light reflectivity for interior light within the incident angle range of 0° to 70°.

[0102] Comparative Example 3 provides a laminated window glass 1000, which includes a first infrared blocking layer 200. However, its transparent conductive oxide layer 210 is not in direct contact with the first absorption layer 220, resulting in an inner visible light reflectance RLint greater than 4% at incident angles of 0°, 20°, and 40°. Therefore, the laminated window glass 1000 provided in Comparative Example 3 cannot meet the requirement of having a low visible light reflectance for interior light within the incident angle range of 0° to 40°.

[0103] The laminated window glass 1000 provided in Example 1 includes a first infrared blocking layer 200, whose visible light transmittance TL≤10%, total solar energy transmittance Tts≤25%, emissivity e≤0.25, and inner visible light reflectance RLint are ≤3%, ≤2%, ≤2%, ≤6%, and ≤15% respectively at incident angles of 0°, 20°, 40°, 60°, and 70°. It can be seen that the laminated window glass 1000 provided in Example 1 can meet the comprehensive requirements of good heat insulation, good low radiation effect, low visible light transmittance, and low reflectance of light inside the vehicle within the incident angle range of 0° to 70°.

[0104] The laminated window glass 1000 provided in Example 2 includes a first infrared blocking layer 200, which has a visible light transmittance TL≤15%, a total solar energy transmittance Tts≤30%, an emissivity e≤0.5 and an inner visible light reflectance RLint ≤3%, ≤2%, ≤2%, ≤6%, and ≤15% at incident angles of 0°, 20°, 40°, 60°, and 70°, respectively. Therefore, the laminated window glass 1000 provided in Example 2 can meet the comprehensive requirements of good heat insulation, good low radiation effect, low visible light transmittance, and low visible light reflectance for interior light within the incident angle range of 0° to 70°.

[0105] The visible light transmittance of the laminated window glass 1000 with the first infrared blocking layer 200 provided in Examples 1-2 is greater than or equal to 10%, or even greater than or equal to 20%, compared with the visible light transmittance of the laminated window glass 1000 without the first infrared blocking layer 200 provided in Comparative Example 1. The first infrared blocking layer 200 of this application can significantly reduce the visible light transmittance of the laminated window glass 1000, thereby eliminating the need to use more expensive dark-colored PVB and reducing production costs.

[0106] Examples 3-7

[0107] The laminated window glass 1000 in Examples 3-7 includes laminated glass 100, a first infrared blocking layer 200 and a second infrared blocking 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 2.1 mm thick transparent glass (visible light transmittance ≥ 80%), the adhesive layer 120 is 0.76 mm thick transparent PVB (visible light transmittance ≥ 80%), and the inner glass plate 130 is 2.1 mm thick gray glass (visible light transmittance ≤ 30%). The first infrared blocking layer 200 is disposed on the fourth surface 132 of the inner glass plate 130, and the second infrared blocking layer 300 is disposed on the second surface 112 of the outer glass plate 110.

[0108] Example 3:

[0109] First infrared blocking layer 200: Nb2O5 (29nm) / SiO2 is sequentially stacked on the fourth surface 132. x (31.2nm) / ITO(215.3nm) / NiCr(5.8nm) / SiO x (53.4nm) / SiN x (19.5nm);

[0110] Second infrared blocking layer 300: ZnSnO is sequentially stacked on the second surface 112. x(25.3nm) / AZO(12.3nm) / Ag(10.8nm) / AZO(10nm) / ZnSnO x (23.5nm) / SiN x (14.6nm), the second infrared blocking layer 300 includes a silver layer.

[0111] Example 4:

[0112] First infrared blocking layer 200: TiO2 is sequentially stacked on the fourth surface 132. x (34.7nm) / SiO x (31.2nm) / ITO(226.7nm) / NiCr(6.4nm) / SiO x (52.7nm) / SiN x (18.9nm);

[0113] Second infrared blocking layer 300: ZnSnO is sequentially stacked on the second surface 112. x (25.3nm) / AZO(12.3nm) / Ag(12.3nm) / AZO(10nm) / ZnSnO x (63.5nm) / AZO(9.9nm) / Ag(13.1nm) / AZO(9.7nm) / ZnSnO x (23.5nm) / SiN x (14.6nm), the second infrared blocking layer 300 includes two silver layers.

[0114] Example 5:

[0115] First infrared blocking layer 200: TiO2 (29nm) / SiO2 is sequentially stacked on the fourth surface 132. x (28.6nm) / ITO(218.5nm) / NiCr(5.8nm) / SiO x (46.6nm) / SiZrAlN x (19.7nm);

[0116] Second infrared blocking layer 300: ZnSnO is sequentially stacked on the second surface 112. x (25.3nm) / AZO(12.3nm) / Ag(12.3nm) / AZO(10nm) / ZnSnO x (63.5nm) / AZO(9.9nm) / Ag(14.5nm) / AZO(9.7nm) / ZnSnO x (53.4nm) / AZO(9.3nm) / Ag(12.6nm) / AZO(9.7nm) / ZnSnOx (23.5nm) / SiN x (14.6nm), the second infrared blocking layer 300 includes three silver layers.

[0117] Example 6:

[0118] First infrared blocking layer 200: Nb2O5 (29nm) / SiO2 is sequentially stacked on the fourth surface 132. x (31.2nm) / ITO(215.3nm) / NiCr(5.8nm) / SiO x (53.4nm) / SiN x (19.5nm).

[0119] Second infrared blocking layer 300: ZnSnO is sequentially stacked on the second surface 112. x (25.3nm) / AZO(12.3nm) / Ag(14.2nm) / AZO(10nm) / ZnSnO x (62.2nm) / AZO(9.9nm) / Ag(13.7nm) / AZO(9.8nm) / ZnSnO x (58.4nm) / AZO(9.8nm) / Ag(12.5nm) / AZO(9.7nm) / ZnSnO x (23.5nm) / SiN x (14.6nm), the second infrared blocking layer 300 includes three silver layers.

[0120] Example 7:

[0121] First infrared blocking layer 200: ZnSnO is sequentially stacked on the fourth surface 132. x (26nm) / ITO(109.4nm) / NiCr(5nm) / SiO x (68.1nm) / NiCr(5.4nm) / SiO x (36.3nm) / SiN x (21nm);

[0122] Second infrared blocking layer 300: ZnSnO is sequentially stacked on the second surface 112. x (25.3nm) / AZO(12.3nm) / Ag(13.2nm) / AZO(10nm) / ZnSnO x (63nm) / AZO(9.9nm) / Ag(13.7nm) / AZO(9.7nm) / ZnSnO x(56.4nm) / AZO(9.3nm) / Ag(12.8nm) / AZO(9.3nm) / ZnSnO x (23nm) / SiN x (11.9nm), the second infrared blocking layer 300 includes three silver layers.

[0123] Prepare an outer glass plate 110, an adhesive layer 120, and an inner glass plate 130 according to Examples 3-7. Deposit a corresponding first infrared blocking layer 200 on the fourth surface 132 of the inner glass plate 130 by magnetron sputtering, and deposit a corresponding second infrared blocking layer 300 on the second surface 112 of the outer glass plate 110 by magnetron sputtering. Then process and manufacture according to the vehicle glass manufacturing process to obtain the laminated window glass 1000 in Examples 3-7.

[0124] The visible light transmittance TL, direct solar transmittance TE, total solar transmittance Tts, emissivity e, inner visible light reflectance RLint, and transmittance index A of the laminated window glass 1000 in Examples 3-7 are measured and calculated, as well as the visible light transmittance TL1 of the inner glass plate 130 on which the first infrared blocking layer 200 is deposited.

[0125] Visible light transmittance TL: The visible light transmittance of laminated window glass 1000 is measured and calculated according to standard ISO9050.

[0126] Visible light transmittance TL1: The visible light transmittance of the inner glass plate 130 and the first infrared blocking layer 200 together is measured and calculated according to standard ISO9050.

[0127] Direct solar transmittance (TE): The direct solar transmittance of laminated window glass 1000 is measured and calculated according to standard ISO 9050.

[0128] Transmission index A: Calculated according to the formula A = TL / (TE * TL1);

[0129] Total solar transmittance (Tts): The total solar transmittance of laminated window glass of 1000 is measured and calculated according to standard ISO9050.

[0130] Emissivity e: Measured from the inner glass plate side using a Fourier transform infrared spectrometer and calibrated according to standard EN12898;

[0131] Inner visible light reflectance RLint: Measured from the inner glass side, the reflectance of laminated window glass 1000 to visible light incident at incident angles of 0°, 20°, 40°, 60° and 70°, calculated according to standard ISO9050.

[0132] The measurement results of Examples 3-7 are included in Table 2.

[0133] Table 2: Measurement results of Examples 3-7

[0134]

[0135] As can be seen from Table 2, the laminated window glass 1000 provided in Examples 3-7 includes a first infrared blocking layer 200 and a second infrared blocking layer 300. Its visible light transmittance TL ≤ 12% or even ≤ 6%, total solar energy transmittance Tts ≤ 20% or even ≤ 15%, emissivity e ≤ 0.25 or even ≤ 0.20, and inner visible light reflectance RLint ≤ 4%, ≤ 3%, ≤ 3%, ≤ 7%, and ≤ 15% respectively at incident angles of 0°, 20°, 40°, 60°, and 70°. Therefore, the laminated window glass 1000 provided in Examples 3-7 can meet the comprehensive requirements of good heat insulation, good low radiation effect, low visible light transmittance, and low visible light reflectance for interior light within the incident angle range of 0° to 70°.

[0136] Compared to Example 3, which includes only one silver layer, the total solar transmittance Tts of the laminated window glass 1000 provided by Examples 4-7, which include two or three silver layers, is significantly reduced to ≤15%, or even to 13%, resulting in a superior heat insulation effect.

[0137] The laminated window glass 1000 provided in Examples 3-7 includes a first infrared blocking layer 200 and a second infrared blocking layer 300, with a transmittance index A greater than 8. This allows the laminated window glass 1000 to meet comprehensive requirements such as good heat insulation, low visible light transmittance, and low visible light reflectance for interior light within an incident angle range of 0° to 70°. Preferably, the transmittance index A of the laminated window glass 1000 is greater than or equal to 10, more preferably greater than or equal to 15, even more preferably greater than or equal to 20, and even greater than or equal to 30.

[0138] Examples 8-11

[0139] The laminated window glass 1000 in Examples 8-11 includes laminated glass 100, a first infrared blocking layer 200 and a second infrared blocking 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 2.1 mm thick transparent glass (visible light transmittance ≥ 80%), the adhesive layer 120 is 0.76 mm thick transparent PVB (visible light transmittance ≥ 80%), and the inner glass plate 130 is 2.1 mm thick gray glass (visible light transmittance ≤ 30%). The first infrared blocking layer 200 is disposed on the fourth surface 132 of the inner glass plate 130, and the second infrared blocking layer 300 is disposed on the second surface 112 of the outer glass plate 110.

[0140] Example 8:

[0141] First infrared blocking layer 200: TiO2 is sequentially stacked on the fourth surface 132. x (51.1nm) / SiO x (30.3nm) / ITO(70.2nm) / NiCr(7.3nm) / SiO x (108.8nm);

[0142] Second infrared blocking layer 300: ZnSnO is sequentially stacked on the second surface 112. x (30nm) / AZO(10nm) / Ag(12nm) / AZO(11nm) / ZnSnO x (61.3nm) / AZO(9.9nm) / Ag(12.6nm) / AZO(9.6nm) / ZnSnO x (57.4nm) / AZO(9.7nm) / Ag(11nm) / AZO(9.7nm) / ZnSnO x (23.5nm) / SiN x (14.6nm), the second infrared blocking layer 300 includes three silver layers.

[0143] Example 9:

[0144] First infrared blocking layer 200: SiZrN is sequentially stacked on the fourth surface 132. x (32.1nm) / SiO x (35.8nm) / ITO(80.2nm) / NiCr(7.1nm) / SiO x (44.3nm) / SiZrN x (20.6nm);

[0145] Second infrared blocking layer 300: ZnSnO is sequentially stacked on the second surface 112. x (25.3nm) / AZO(12.3nm) / Ag(12.3nm) / AZO(10nm) / ZnSnOx(63.5nm) / AZO(9.9nm) / Ag(14.5nm) / AZO(9.7nm) / ZnSnO x (53.5nm) / AZO(9.3nm) / Ag(12.6nm) / AZO(9.7nm) / ZnSnO x (23.5nm) / SiN x (14.6nm), the second infrared blocking layer 300 includes three silver layers.

[0146] Example 10:

[0147] First infrared blocking layer 200: ZnSnO is sequentially stacked on the fourth surface 132. x (161.8nm) / NiCr(6.4nm) / SiO x (48.9nm) / SiN x (18.5nm);

[0148] Second infrared blocking layer 300: ZnSnO is sequentially stacked on the second surface 112. x (26.5nm) / AZO(12.3nm) / Ag(12nm) / NiCr(3.3nm) / AZO(10nm) / ZnSnO x (69.3nm) / AZO(9.9nm) / Ag(10.6nm) / NiCr(4.5nm) / AZO(9.6nm) / ZnSnO x (50.4nm) / AZO(10nm) / Ag(11nm) / AZO(9.9nm) / ZnSnO x (19.7nm) / SiN x (14.6nm), the second infrared blocking layer 300 includes three silver layers.

[0149] Example 11:

[0150] First infrared blocking layer 200: HAZO (148.9nm) / NiCr (4.9nm) / SiO are sequentially stacked on the fourth surface 132. x (48.9nm) / SiN x (18.5nm);

[0151] Second infrared blocking layer 300: ZnSnO is sequentially stacked on the second surface 112. x (26.5nm) / AZO(12.3nm) / Ag(12.8nm) / NiCr(3.9nm) / AZO(11.2nm) / ZnSnO x (66.2nm) / AZO(9.9nm) / Ag(12.4nm) / NiCr(4.5nm) / AZO(9.9nm) / ZnSnO x (22.1nm) / SiN x (14.6nm), the second infrared blocking layer 300 includes two silver layers.

[0152] Prepare an outer glass plate 110, an adhesive layer 120, and an inner glass plate 130 according to Examples 8-11. Deposit a corresponding first infrared blocking layer 200 on the fourth surface 132 of the inner glass plate 130 by magnetron sputtering, and deposit a corresponding second infrared blocking layer 300 on the second surface 112 of the outer glass plate 110 by magnetron sputtering. Then process and manufacture according to the vehicle glass manufacturing process to obtain the laminated window glass 1000 in Examples 8-11.

[0153] The visible light transmittance TL, direct solar transmittance TE, total solar transmittance Tts, emissivity e, inner visible light reflectance RLint, and transmittance index A of the laminated window glass 1000 in Examples 8-11 are measured and calculated, as well as the visible light transmittance TL1 of the inner glass plate 130 on which the first infrared blocking layer 200 is deposited.

[0154] Visible light transmittance TL: The visible light transmittance of laminated window glass 1000 is measured and calculated according to standard ISO9050.

[0155] Visible light transmittance TL1: The visible light transmittance of the inner glass plate 130 and the first infrared blocking layer 200 together is measured and calculated according to standard ISO9050.

[0156] Direct solar transmittance (TE): The direct solar transmittance of laminated window glass 1000 is measured and calculated according to standard ISO 9050.

[0157] Transmission index A: Calculated according to the formula A = TL / (TE * TL1);

[0158] Total solar transmittance (Tts): The total solar transmittance of laminated window glass of 1000 is measured and calculated according to standard ISO9050.

[0159] Emissivity e: Measured from the inner glass plate side using a Fourier transform infrared spectrometer and calibrated according to standard EN12898;

[0160] Inner visible light reflectance RLint: Measured from the inner glass side, the reflectance of laminated window glass 1000 to visible light incident at incident angles of 0°, 20°, 40°, 60° and 70°, calculated according to standard ISO9050.

[0161] The measurement results of Examples 8-11 are recorded in Table 3.

[0162] Table 3: Measurement results of Examples 8-11

[0163]

[0164] As can be seen from Table 3, the laminated window glass 1000 provided in Examples 8-11 includes a first infrared blocking layer 200 and a second infrared blocking layer 300. Its visible light transmittance TL≤12%, total solar energy transmittance Tts≤16%, emissivity e≤0.5, and inner visible light reflectance RLint are ≤4%, ≤3%, ≤3%, ≤6%, and ≤15% respectively at incident angles of 0°, 20°, 40°, 60°, and 70°. Therefore, the laminated window glass 1000 provided in Examples 8-11 can meet the comprehensive requirements of good heat insulation, good low radiation effect, low visible light transmittance, and low visible light reflectance for interior light within the incident angle range of 0° to 70°.

[0165] Compared with Examples 8-9, the second infrared blocking layer 300 of the laminated window glass 1000 provided in Examples 10-11 is additionally provided with two NiCr absorption layers, which reduces the visible light transmittance and visible light reflectance of the laminated window glass 1000 provided in Examples 10-11 in the range of 0° to 40° incident angle. This makes the visible light transmittance TL of the laminated window glass 1000 provided in Examples 10-11 ≤ 10%, and the inner visible light reflectance RLint ≤ 2% or even ≤ 1% when the incident angle is 0°, 20°, and 40°.

[0166] The laminated window glass 1000 provided in Examples 8-11 includes a first infrared blocking layer 200 and a second infrared blocking layer 300, with a transmittance index A greater than 8. This allows the laminated window glass 1000 to meet comprehensive requirements such as good heat insulation, low visible light transmittance, and low visible light reflectance for interior light within an incident angle range of 0° to 70°. Preferably, the transmittance index A of the laminated window glass 1000 is greater than or equal to 10, more preferably greater than or equal to 15.

[0167] The above description provides a detailed description of the laminated window glass of this application. However, this application is not limited to the specific embodiments described above. Therefore, any improvements, equivalent modifications, and substitutions made based on the technical points of this application shall fall within the scope of protection of this application.

Claims

1. A type of laminated window glass, characterized in that, It includes an outer glass plate, an adhesive layer, an inner glass plate, and a first infrared blocking layer. 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 blocking layer is disposed on the fourth surface. When the incident angle of visible light θ is 60°<θ≤70°, the visible light reflectivity of the inner side of the laminated window glass is less than or equal to 16%; The first infrared blocking layer comprises a transparent conductive oxide layer, a first absorption layer and a first low refractive index layer sequentially stacked on the fourth surface, wherein the refractive index of the first low refractive index layer is less than 1.

9. The material of the first absorber layer is selected from at least one of NiCr, NiAl, NiSi, Cr, TiN, NbN, and MoTi.

2. The laminated window glass according to claim 1, characterized in that, When the visible light incident angle θ is 40°<θ≤60°, the visible light reflectivity of the inner side of the laminated window glass is less than or equal to 8%.

3. The laminated window glass according to claim 1, characterized in that, When the visible light incident angle θ is 0°≤θ≤40°, the visible light reflectivity of the inner side of the laminated window glass is less than or equal to 4%.

4. The laminated window glass according to claim 1, characterized in that, The visible light transmittance of the laminated window glass is less than or equal to 16%, the visible light transmittance of the outer glass panel is greater than or equal to 70%, and the visible light transmittance of the inner glass panel is 10% to 50%.

5. The laminated window glass according to claim 4, characterized in that, The adhesive layer is a thermoplastic polymer layer with a visible light transmittance greater than or equal to 70%.

6. The laminated window glass according to claim 1, characterized in that, The material of the transparent conductive oxide layer is selected from ITO and NiCrO. x FTO, ZnSnO x The zinc oxide contains at least one of the following elements: aluminum, tungsten, hafnium, gallium, yttrium, niobium, and neodymium.

7. The laminated window glass according to claim 1, characterized in that, The thickness of the transparent conductive oxide layer is 50nm~300nm, the thickness of the first absorption layer is 2nm~30nm, and the thickness of the first low refractive index layer is 10nm~300nm.

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

9. The laminated window glass according to claim 1, characterized in that, The first infrared blocking 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, and the second low refractive index layer is further away from the fourth surface than the first low refractive index layer.

10. The laminated window glass according to claim 1, characterized in that, The first infrared blocking layer further includes at least one stacked structure, which is disposed between the fourth surface and the transparent conductive oxide layer. Each stacked 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 greater than or equal to 1.9, and the refractive index of the lower low refractive index layer is less than 1.

9.

11. The laminated window glass according to claim 9, characterized in that, The first infrared blocking layer further includes an outermost high refractive index layer, which is the layer furthest from the fourth surface in the first infrared blocking layer. The refractive index of the outermost high refractive index layer is greater than or equal to 1.9, and the thickness of the outermost high refractive index layer is 5 nm to 50 nm.

12. The laminated window glass according to claim 11, characterized in that, 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.

13. The laminated window glass according to claim 1, characterized in that, Measured from one side of the inner glass panel, the emissivity of the laminated window glass is 0.35 to 0.

5.

14. The laminated window glass according to claim 1, characterized in that, Measured from one side of the inner glass panel, the emissivity of the laminated window glass is less than 0.

35.

15. The laminated window glass according to claim 1, characterized in that, The laminated window glass further includes a second infrared blocking layer, which is disposed between the outer glass plate and the inner glass plate. The second infrared blocking layer includes at least one metal layer and at least two dielectric layers, with each metal layer located between two adjacent dielectric layers. The material of the metal layer is a metal or metal alloy selected from at least one element selected from Ag, Au, Cu, Al, and Pt.

16. The laminated window glass according to claim 15, characterized in that, The second infrared blocking layer also includes at least one NiCr absorption layer, the thickness of which is greater than or equal to 3 nm.

17. The laminated window glass according to claim 15, characterized in that, 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 direct sunlight transmittance of the laminated window glass, and TL1 is the visible light transmittance of the inner glass plate and the first infrared blocking layer together.

18. The laminated window glass according to claim 17, characterized in that, The transmittance index A of the laminated window glass is greater than or equal to 10.

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