Sandwich glazing

Abstract

The invention provides interlayer window glass which comprises an outer glass plate, a bonding layer, an inner glass plate and a first infrared blocking layer, the outer glass plate comprises a first surface and a second surface which are oppositely arranged, the inner glass plate comprises a third surface and a fourth surface which are oppositely arranged, and the bonding layer is arranged between the second surface and the third surface. The first infrared blocking layer is arranged on the fourth surface; when the visible light incidence angle is 0-70 degrees, the visible light reflectivity of the inner side of the interlayer window glass is smaller than or equal to 16%. The interlayer window glass has a better heat insulation effect, lower visible light transmittance and lower visible light reflectivity measured from one side in a vehicle, so that passengers and articles in the vehicle are prevented from forming obvious inverted images on the skylight glass, and the riding comfort is improved.

Description

Laminated window glass Technical Field

[0001] The present application relates to the technical field of glass products, in particular to laminated window glass installed on vehicles. Background Art

[0002] With growing market demand for new energy vehicles, and the resulting reduction in vehicle interior height due to the installation of power battery modules within new energy vehicle chassis, more and more automakers are seeking to increase interior headroom by eliminating the traditional sunshade on sunroof glass. Removing the sunshade allows sunlight to enter the vehicle directly through the sunroof glass. This, particularly with panoramic skylights or sunroofs, can result in excessive interior brightness, disrupting passenger vision and reducing ride comfort. This also requires increased energy consumption to maintain temperature in both summer and winter. To overcome these issues, existing technologies typically use heat-insulating sunroof glass with low visible light transmittance, such as glass with a visible light transmittance of less than or equal to 16%. However, when installed in a vehicle, the low visible light transmittance of the sunroof glass results in a high visible light reflectance measured from the interior side. This can cause passengers and objects within the vehicle to be easily reflected on the sunroof glass due to specular reflection, significantly disrupting the visual experience for passengers, particularly those in the rear seats.

[0003] Summary of the Invention

[0004] The purpose of this application is to provide a laminated window glass, which has good heat insulation effect, low visible light transmittance and low visible light reflectivity measured from the inside of the car, thereby avoiding the obvious reflection of passengers and objects in the car on the skylight glass, and improving the riding comfort.

[0005] The present application provides a laminated window glass, comprising an outer glass plate, an adhesive layer, an inner glass plate, and a first infrared blocking layer, wherein the outer glass plate comprises a first surface and a second surface disposed opposite to each other, the inner glass plate comprises 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;

[0006] When the incident angle θ of visible light is 60°<θ≤70°, the inner side visible light reflectivity of the laminated window glass is less than or equal to 16%.

[0007] When the incident angle θ of visible light is 40°<θ≤60°, the visible light reflectivity of the inner side of the laminated window glass is less than or equal to 8%.

[0008] Wherein, when the incident angle of visible light is 0°≤θ≤40°, the inner side visible light reflectivity of the laminated window glass is less than or equal to 4%.

[0009] The visible light transmittance of the laminated window glass is less than or equal to 16%, the visible light transmittance of the outer glass plate is greater than or equal to 70%, and the visible light transmittance of the inner glass plate is 10% to 50%.

[0010] Wherein, the adhesive layer is a thermoplastic polymer layer with a visible light transmittance greater than or equal to 70%.

[0011] The first infrared blocking layer includes a transparent conductive oxide layer, a first absorption layer and a first low refractive index layer stacked in sequence on the fourth surface, and the refractive index of the first low refractive index layer is less than 1.9.

[0012] Among them, the material of the transparent conductive oxide layer is selected from ITO, NiCrO x 、FTO、ZnSnO x , at least one of doped zinc oxide, the doping element in the doped zinc oxide is at least one of aluminum, tungsten, hafnium, gallium, yttrium, niobium, and neodymium.

[0013] The material of the first absorption layer is selected from at least one of NiCr, NiAl, NiSi, Cr, TiN, NbN, and MoTi.

[0014] 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.

[0015] 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.

[0016] The first infrared blocking layer further includes a second absorption layer and a second low refractive index layer. The second absorption layer is arranged between the first low refractive index layer and the second low refractive index layer. The second low refractive index layer is farther away from the fourth surface than the first low refractive index layer.

[0017] Among them, the first infrared blocking layer also includes at least one stacked structure, at least one stacked structure is arranged 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.

[0018] Among them, the first infrared blocking layer also includes an outermost high refractive index layer, which is the layer farthest 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.

[0019] 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.

[0020] Among them, the emissivity of laminated window glass is 0.35~0.5 when measured from the inner glass panel side.

[0021] Among them, the emissivity of the laminated window glass is less than 0.35 when measured from the inner glass panel side.

[0022] Among them, the laminated window glass also includes a second infrared blocking layer, which is arranged 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 of Ag, Au, Cu, Al, and Pt.

[0023] The second infrared blocking layer further includes at least one NiCr absorption layer, and the thickness of the NiCr absorption layer is greater than or equal to 3 nm.

[0024] The transmittance index A of the laminated window glass is greater than 8, and 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 panel and the first infrared blocking layer together.

[0025] Wherein, the transmittance index A of the laminated window glass is greater than or equal to 10.

[0026] The present application provides a laminated window glass that can meet the comprehensive requirements of good thermal insulation effect, good low-radiation effect, low visible light transmittance, and low visible light reflectivity for light inside the vehicle within the incident angle range of 0° to 70°. It has good low-angle anti-reflection effect and medium- and high-angle anti-reflection effect, making it difficult for passengers and objects in the vehicle to form obvious reflections on the laminated window glass due to mirror reflection, and can reduce or even eliminate the visual interference caused to passengers, especially rear passengers, and improve the thermal comfort, brightness comfort and visual comfort in the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a schematic structural diagram of a vehicle equipped with a laminated window glass according to an embodiment of the present application;

[0028] FIG2 is a schematic diagram of a cross-sectional structure of a laminated window glass along the thickness direction according to the first embodiment of the present application;

[0029] FIG3 is a schematic structural diagram of the first infrared blocking layer in the laminated window glass shown in FIG2 in a first example;

[0030] FIG4 is a schematic structural diagram of the first infrared blocking layer in the laminated window glass shown in FIG2 in a second example;

[0031] FIG5 is a schematic structural diagram of the first infrared blocking layer in the laminated window glass shown in FIG2 in a third example;

[0032] FIG6 is a schematic structural diagram of the first infrared blocking layer in the laminated window glass shown in FIG2 in a fourth example;

[0033] FIG7 is a schematic diagram of the cross-sectional structure of a laminated window glass along the thickness direction according to the second embodiment of the present application. DETAILED DESCRIPTION

[0034] The contents of this application are further described below with reference to the accompanying drawings.

[0035] Referring to FIG. 1 , FIG. 1 shows a schematic structural diagram of a vehicle 1 equipped with a laminated window glass 1000 according to an embodiment of the present application.

[0036] Vehicle 1 includes a laminated window glass 1000 and a vehicle body 2000. The vehicle body 2000 has a vehicle body opening 2100. Laminated window glass 1000 is mounted in vehicle body opening 2100 and serves as a sunroof. Laminated window glass 1000 can be used as either a side window or a sunroof. In this embodiment, the laminated window glass 1000 is used as a sunroof.

[0037] For ease of description, the length direction of the laminated window glass 1000 shown in FIG1 is the X-axis direction, the width direction is the Y-axis direction, and the thickness direction is the Z-axis direction, wherein the positive direction of the Z-axis is the direction from the outside to the inside of the vehicle 1 .

[0038] The laminated window glass 1000 provided in the embodiment of the present application, when installed in the vehicle body opening 2100, can reduce the transmission of infrared, ultraviolet, and visible light rays into the interior of the vehicle 1. It exhibits excellent heat insulation and low visible light transmittance, thereby improving both thermal and brightness comfort within the vehicle. Furthermore, the laminated window glass 1000 can reduce the ingress of external heat radiation into the interior of the vehicle 1 in the summer and reduce heat loss from the interior to the exterior of the vehicle 1 in the winter, thereby meeting energy conservation and environmental protection requirements. Furthermore, the visible light reflectance of the laminated window glass 1000, measured from the interior side of the vehicle, is also low. This reduces the likelihood of passengers and objects within the vehicle being significantly reflected on the sunroof glass due to specular reflection, thereby reducing or even eliminating visual interference for passengers, particularly those in the rear seats, and improving visual comfort within the vehicle.

[0039] Please refer to FIG2 , which is a schematic diagram of the cross-sectional structure of a laminated window glass along the thickness direction according to the first embodiment of the present application.

[0040] The laminated window glass 1000 includes a laminated glass 100 and a first infrared-blocking layer 200. The laminated glass 100 includes an outer glass pane 110, an adhesive layer 120, and an inner glass pane 130. The adhesive layer 120 is disposed between the outer glass pane 110 and the inner glass pane 130. The outer glass pane 110 includes a first surface 111 and a second surface 112 disposed opposite each other. The first surface 111 faces the exterior of the vehicle 1, and the second surface 112 is adjacent to the adhesive layer 120. The inner glass pane 130 includes a third surface 131 and a fourth surface 132 disposed opposite each other. The third surface 131 is adjacent to the adhesive layer 120, and the fourth surface 132 faces the interior 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 through the outer glass pane 110, the adhesive layer 120, the inner glass pane 130, and the first infrared-blocking layer 200 in sequence, entering the vehicle interior.

[0041] 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 between 10% and 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 tinted glass is used 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 lower visible light transmittance, thereby meeting privacy and light-shielding requirements. Furthermore, it can reduce the amount of heat radiation from outside the vehicle 1 that enters the vehicle 1 in the summer and reduce heat loss from the vehicle 1 to the exterior in the winter.

[0042] The adhesive layer 120 is a thermoplastic polymer layer with a visible light transmittance greater than or equal to 70%, which is 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 the present application, the use of a thermoplastic polymer layer with a visible light transmittance greater than or equal to 70% can also achieve a visible light transmittance of less than or equal to 16% for the laminated window glass 1000, preferably less than or equal to 12%, more preferably less than or equal to 10%, or even 1% to 5%. This eliminates the need for more expensive dark-colored thermoplastic polymer layers, thereby reducing production costs. It is understood that the present application can also use a thermoplastic polymer layer with a visible light transmittance less than 70%, such as gray PVB, as needed to provide more product combinations.

[0043] When the laminated window glass 1000 provided in the embodiment of the present application is used as a skylight glass, the first infrared blocking layer 200 provided on the fourth surface 132 can reduce the emissivity of the laminated window glass 1000 measured from the side inside the vehicle, further reduce the total solar energy transmittance Tts of the laminated window glass 1000, and can also reduce the visible light reflectivity of the laminated window glass 1000 measured from the side inside the vehicle, thereby achieving a low visible light reflectivity within a wider range of incident angles, thereby improving the high-angle anti-reflection effect on the light inside the vehicle, making it difficult for rear passengers to observe obvious reflections on the skylight glass, and can reduce or even eliminate visual interference, thereby improving the visual comfort inside the vehicle.

[0044] The laminated window glass 1000 provided in the embodiment of the present application can achieve a low-angle anti-reflection effect. When visible light enters the laminated window glass 1000 provided in the embodiment of the present application at an incident angle θ of 0°≤θ≤40°, the inner side visible light reflectance of the laminated window glass 1000 is less than or equal to 4%. The laminated window glass 1000 provided in the embodiment of the present application can also achieve a medium- and high-angle anti-reflection effect. The laminated window glass 1000 has an inner side visible light reflectance of less than or equal to 8% for visible light entering at an incident angle θ of 40°<θ≤60°. Furthermore, the laminated window glass 1000 has an inner side visible light reflectance of less than or equal to 16% for visible light entering at an incident angle θ of 60°<θ≤70°. The inner side visible light reflectance refers to the visible light reflectance of the laminated window glass 1000 when the visible light enters the vehicle from the interior.

[0045] Please refer to FIG. 3 , which is a schematic structural diagram of the first infrared blocking layer 200 in the laminated window glass 1000 shown in FIG. 2 in a first example.

[0046] Along the positive Z-axis direction, i.e., from the outer glass plate 110 toward 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, which are 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.

[0047] The emissivity of ordinary laminated glass is generally about 0.9. The function of the transparent conductive oxide layer 210 is to reduce the emissivity of the laminated window glass 1000. When measured from the inside of the vehicle, that is, from the side of the inner glass plate 130, 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), NiCrO x , FTO (fluorine-doped tin oxide), ZnSnOx , at least one of doped zinc oxide. Wherein, the doping element in the doped zinc oxide may be at least one of aluminum, tungsten, hafnium, gallium, yttrium, niobium, and neodymium, and examples thereof include AZO (aluminum-doped zinc oxide) and HAZO (AZO doped with hafnium and aluminum). In some embodiments, the thickness of the transparent conductive oxide layer 210 is 50nm to 300nm. In other embodiments, the thickness of the transparent conductive oxide layer 210 is 60nm to 280nm. Wherein the transparent conductive oxide layer 210 can be a single layer, such as only one ITO layer, or it can have multiple layers, where "multilayer" refers to two or more layers, and the materials of adjacent layers are different, such as the transparent conductive oxide layer 210 includes ZnSnO stacked in sequence. x layer / ITO layer, or the transparent conductive oxide layer 210 includes an ITO layer / HAZO layer stacked in sequence, or the transparent conductive oxide layer 210 includes a ZnSnO layer stacked in sequence. x Layer / ITO layer / HAZO layer. In some specific embodiments, the emissivity of the laminated window glass 1000 measured from the vehicle interior, i.e., from the inner glass panel 130, is 0.35 to 0.5, which can achieve more convenient and lower-cost manufacturing. Specific examples of the emissivity of the laminated window glass 1000 include 0.36, 0.41, 0.45, 0.47, etc. In some specific embodiments, the emissivity of the laminated window glass 1000 measured from the vehicle interior, i.e., from the inner glass panel 130, is less than 0.35, more preferably less than or equal to 0.3, or even less than or equal to 0.25, which can achieve better thermal insulation and heat preservation effects. Specific examples of the emissivity of the laminated window glass 1000 include 0.11, 0.15, 0.16, 0.17, 0.22, 0.23, etc.

[0048] The first absorption layer 220 functions to further reduce the emissivity of the laminated window glass 1000 and to reduce its visible light transmittance and visible light reflectance. 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, with specific examples including 3.5 nm, 4 nm, 5 nm, 6 nm, 7 nm, 8 nm, 9 nm, 10 nm, 11 nm, 15 nm, and 18 nm.

[0049] The first low-refractive-index layer 230 has a refractive index less than 1.9 and is in direct contact with the first absorbing layer 220. Its function is to adjust the optical color of the laminated window glass 1000 and reduce the high-angle visible light reflectance of the interior light of the vehicle at 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 between 10 nm and 300 nm. In other embodiments, the thickness of the first low-refractive-index layer 230 is between 20 nm and 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.

[0050] The embodiment of the present application forms a first infrared blocking layer 200 by providing a transparent conductive oxide layer 210, a first absorption layer 220 and a first low refractive index layer 230 stacked in sequence. On the one hand, it can reduce the emissivity of the laminated window glass 1000, and on the other hand, it also has a low visible light reflectivity for light within a wide range of incident angles inside the vehicle, achieving a high-angle anti-reflection effect on the light inside the vehicle, and avoiding visual interference caused by mirror reflection on people and objects in the vehicle.

[0051] Please refer to FIG. 4 , which is a schematic structural diagram of the first infrared blocking layer 200 in the laminated window glass 1000 shown in FIG. 2 in a second example.

[0052] In this example, the first infrared blocking layer 200 differs from the first infrared blocking layer 200 in 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. In other words, 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 stacked sequentially 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.

[0053] The refractive index of the second low-refractive-index layer 240 is 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 can also have a single layer or multiple layers.

[0054] In other examples, the first infrared blocking layer 200 may further include more absorption layers, such as a third absorption layer, a fourth absorption layer, etc. The first infrared blocking layer 200 including the third absorption layer may 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 sequentially stacked on the fourth surface 132. The first infrared blocking layer 200 including the fourth absorption layer may 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 sequentially stacked on the fourth surface 132.

[0055] Please refer to FIG5 , which is a schematic structural diagram of the first infrared blocking layer 200 in the laminated window glass 1000 shown in FIG2 in a third example.

[0056] 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 a laminated structure 250, which is disposed between the inner glass plate 130 and the transparent conductive oxide layer 210. It will be appreciated that the laminated structure 250 may also be added to the first infrared blocking layer 200 in other examples.

[0057] 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 stacked in sequence, the lower high refractive index layer 251 is directly arranged on the fourth surface 132, and the lower low refractive index layer 252 is arranged 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 in sequence on the fourth surface 132. By providing the laminated 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 preventing the alkali metal ions from damaging the performance of the first infrared blocking layer 200. At the same time, through the combined action of the lower high refractive index layer 251 and the lower low refractive index layer 252, the laminated structure 250 is also beneficial for adjusting the optical effect of the first infrared blocking layer 200, such as appropriately increasing the visible light transmittance and further reducing the visible light reflectivity of the light inside the vehicle at high angles of the laminated window glass 1000, which is more helpful in avoiding visual interference caused by mirror reflections on people and objects inside the vehicle.

[0058] In other examples, a stacked structure 250 may 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 stacked in sequence on the fourth surface 132.

[0059] Among them, the number of the stacked structures 250 is at least one. Figure 5 is an example of having one stacked structure 250, that is, the stacked structure 250 is a lower high refractive index layer 251 / a lower low refractive index layer 252. In other embodiments, the number of the 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 / a lower low refractive index layer 252 / a lower high refractive index layer 251 / a lower low refractive index layer 252.

[0060] The refractive index of the lower high-refractive-index layer 251 is greater than or equal to 1.9. In some specific embodiments, the material of the lower high-refractive-index layer 251 is selected from nitrides, oxides, or oxynitrides of at least one of the following elements: 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 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 selected from oxides of one or more of the following elements: 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 can also comprise a single layer or multiple layers.

[0061] Please refer to FIG. 6 , which is a schematic structural diagram of the first infrared blocking layer 200 in the laminated window glass 1000 shown in FIG. 2 in a fourth example.

[0062] In this example, the first infrared blocking layer 200 is different from the first infrared blocking layer 200 in the first example in that the first infrared blocking layer 200 also includes an outermost high refractive index layer 260, which is arranged on the side surface of the first low refractive index 230 layer 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 230, that is, the outermost high refractive index layer 260 is the layer in the first infrared blocking layer 200 farthest from the fourth surface 132.

[0063] The provision of the outermost high-refractive-index layer 260 can further reduce the visible light reflectance of the interior light on the inner side of the laminated window glass 1000 at certain angles, further helping to prevent visual interference caused by specular reflections on people and objects inside the vehicle. 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, which are sequentially stacked on the fourth surface 132. The thickness of the first low-refractive-index layer 230 is greater than that of the outermost high-refractive-index layer 260. It is understandable that an outermost high refractive index layer 260 may be added to the first infrared blocking layer 200 in other examples. For example, the first infrared blocking 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, and an outermost high refractive index layer 260 stacked in sequence on the fourth surface 132. For another example, the first infrared blocking 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, a second low refractive index layer 240, and an outermost high refractive index layer 260 stacked in sequence on the fourth surface 132, and the thickness of the second low refractive index layer 240 is greater than the thickness of the outermost high refractive index layer 260.

[0064] The refractive index of the outermost high refractive index layer 260 is greater than or equal to 1.9. In some specific embodiments, the material of the outermost high refractive index layer 260 is selected from nitrides, oxides, or oxynitrides of at least one element selected from 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.

[0065] Please refer to FIG. 7 , which is a schematic diagram of the cross-sectional structure of a laminated window glass along the thickness direction according to the second embodiment of the present application.

[0066] The laminated window glass 1000 comprises a laminated glass 100 , a first infrared blocking layer 200 and a second infrared blocking layer 300 . The difference from 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 .

[0067] The second infrared blocking layer 300 reflects infrared rays, providing heat insulation and sun protection. The combined effect of the second infrared blocking layer 300 and the first infrared blocking layer 200 provides laminated window glass 1000 with improved heat insulation and 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 significantly improving thermal comfort within the vehicle. It can be understood that, in other embodiments, the second infrared blocking layer 300 can also be arranged on the third surface 131 of the laminated glass 100, that is, the laminated window glass 1000 includes the outer glass panel 110 / adhesive layer 120 / second infrared blocking layer 300 / inner glass panel 130 / first infrared blocking layer 200; or be arranged on the adhesive layer 120, that is, the laminated window glass 1000 includes the outer glass panel 110 / adhesive layer 120 / second infrared blocking layer 300 / inner glass panel 130 / first infrared blocking layer 200, or includes the outer glass panel 110 / second infrared blocking layer 300 / adhesive layer 120 / inner glass panel 130 / first infrared blocking layer 200; or be arranged in the adhesive layer 120, the laminated window glass 1000 includes the outer glass panel 110 / adhesive layer 120 / second infrared blocking layer 300 / adhesive layer 120 / inner glass panel 130 / first infrared blocking layer 200.

[0068] The outer glass panel 110 has a visible light transmittance of greater than or equal to 70%, preferably greater than or equal to 80%. Specifically, transparent glass (ordinary white glass), extra-clear glass (ultra-clear glass), etc. can be used. 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 glass or extra-clear glass as the outer glass panel 110 facilitates the maximum amount of infrared light reaching and being reflected by the second infrared blocking layer 300. It also facilitates the outer glass panel 110 to absorb as little infrared light as possible, thereby preventing the laminated window glass 1000 from absorbing excessive heat and generating secondary radiation.

[0069] The second infrared blocking layer 300 includes at least one metal layer and at least two dielectric layers, with each metal layer positioned between two adjacent dielectric layers. The second infrared blocking layer 300 may include one metal layer, two metal layers, three metal layers, four metal layers, or even more metal layers. In this application, "multiple" refers to two or more layers. The dielectric layer protects the metal layer from oxidation and also adjusts the optical, mechanical, and reflective color properties of the second infrared blocking layer 300.

[0070] In some specific embodiments, the material of the metal layer may be a metal or metal alloy of 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.

[0071] In some specific embodiments, the second infrared blocking layer 300 further includes at least one NiCr absorption layer, and the thickness of the NiCr absorption layer is greater than or equal to 3 nm.

[0072] In some specific embodiments, the material of the dielectric layer may be at least one of nitrides, oxides, and oxynitrides selected from Group A elements. Group A elements are 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.

[0073] Example

[0074] Some examples of the present application are given below for further explanation, but the present invention is not limited to the following examples.

[0075] For ease of understanding, the terms involved in the embodiments of the present application are first explained.

[0076] ZnSnO x 、SiN x 、SiO x The value of x in the chemical formula can be determined according to whether the magnetron sputtering process is deposited in a stoichiometric, substoichiometric or superstoichiometric manner.

[0077] Thickness: physical thickness.

[0078] Refractive index: The refractive index of transmitted light at a wavelength of 550nm.

[0079] Angle of incidence: It is the angle between the light incident on the laminated window glass and the surface normal at the incident position.

[0080] Measurement from the inner glass pane side: Measurement is performed when light is incident on the laminated window glass 1000 from the inner glass pane side. This is equivalent to measuring when light is incident on the laminated window glass 1000 from the vehicle interior side after the laminated window glass 1000 is installed on the vehicle.

[0081] Examples 1-2 and Comparative Examples 1-3

[0082] The laminated window glass 1000 in Examples 1-2 and Comparative Examples 1-3 includes a laminated glass 100, which includes an outer glass plate 110, an adhesive layer 120, and an inner glass plate 130. The outer glass plate 110 is a 2.1 mm thick transparent glass (visible light transmittance ≥ 80%), the adhesive layer 120 is a 0.76 mm thick transparent PVB (visible light transmittance ≥ 80%), and the inner glass plate 130 is a 2.1 mm thick gray glass (visible light transmittance ≤ 30%).

[0083] Example 1: The laminated window glass 1000 includes the first infrared blocking layer 200 but does not include the second infrared blocking layer 300;

[0084] The first infrared blocking layer 200 is formed by sequentially stacking ZnSnO 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 (21 nm), the description in the brackets 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), the first absorption layer (NiCr), the first low refractive index layer (SiO x ), the second absorption layer (NiCr), the second low refractive index layer (SiO x ), the outermost high refractive index layer (SiN x ).

[0085] Example 2: The laminated window glass 1000 includes the first infrared blocking layer 200 but does not include the second infrared blocking layer 300;

[0086] The 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 (20.6 nm). The first infrared blocking layer 200 of Example 2 specifically includes a lower high refractive index layer (SiZrN x ), the lower low refractive index layer (SiO x ), transparent conductive oxide layer (ITO), first absorption layer (NiCr), first low refractive index layer (SiO x ), the outermost high refractive index layer (SiN x ).

[0087] Comparative Example 1: The laminated window glass 1000 does not include the first infrared blocking layer 200 and the second infrared blocking layer 300 .

[0088] Comparative Example 2: The laminated window glass 1000 includes the second infrared blocking layer 300 but does not include the first infrared blocking layer 200;

[0089] The second infrared blocking layer 300 is formed by sequentially stacking ZnSnO 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 (14.6 nm), the second infrared blocking layer 300 includes three silver layers.

[0090] Comparative Example 3: The laminated window glass 1000 includes the first infrared blocking layer 200 but does not include the second infrared blocking layer 300;

[0091] The first infrared blocking layer 200 is formed by sequentially stacking Nb2O5 (29 nm) / SiO on the fourth surface 132. x (31.2nm) / ITO(215.3nm) / SiO x (72.9nm) / NiCr(8.3nm) / SiO x (53.4nm) / SiN x (19.5 nm), the first infrared blocking layer 200 in comparative example 3 is different from the first infrared blocking layer 200 in embodiments 1-2 in that the transparent conductive oxide layer 210 in comparative example 3 is not in direct contact with the first absorption layer 220, and a 72.9 nm thick SiO2 layer is provided between them. x layer.

[0092] The outer glass plate 110, adhesive layer 120 and inner glass plate 130 of Examples 1-2 and Comparative Examples 1-3 are prepared, and a corresponding first infrared blocking layer 200 is deposited on the fourth surface 132 of the inner glass plate 130 by a magnetron sputtering process. Then, the laminated window glass 1000 of Examples 1-2 and Comparative Examples 1-3 is obtained by processing and manufacturing according to the vehicle glass production process.

[0093] The visible light transmittance TL, total solar energy transmittance Tts, emissivity e, and inside visible light reflectance RLint of the laminated window glass 1000 in Examples 1-2 and Comparative Examples 1-3 were measured and calculated.

[0094] Visible light transmittance TL: measured and calculated according to standard ISO9050;

[0095] Total solar transmittance Tts: measured and calculated according to standard ISO9050;

[0096] Emissivity e: measured from the inner glass pane using a Fourier transform infrared spectrometer and calculated and calibrated according to standard EN12898;

[0097] Inner side visible light reflectance RLint: measured from the inner glass pane side, calculated according to standard ISO9050, the reflectance of the laminated window glass 1000 for visible light incident at angles of 0°, 20°, 40°, 60° and 70° respectively;

[0098] The measurement results of Examples 1-2 and Comparative Examples 1-3 are recorded in Table 1.

[0099] Table 1: Measurement results of Examples 1-2 and Comparative Examples 1-3

[0100]

[0101] As can be seen from Table 1, the laminated window glass 1000 provided in Comparative Example 1 does not include the first infrared blocking layer 200 and the second infrared blocking layer 300, and its visible light transmittance TL is greater than 25%, the total solar energy transmittance Tts is greater than 40%, the emissivity e is greater than 0.5, and the inner visible light reflectivity RLint is greater than 4%, 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, it can be seen that the laminated window glass 1000 provided in Comparative Example 1 cannot meet the comprehensive requirements of good thermal insulation effect, good low-emissivity effect, low visible light transmittance, and low visible light reflectivity for vehicle interior light within the incident angle range of 0° to 70°.

[0102] The laminated window glass 1000 provided in Comparative Example 2 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 the 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-radiation effect and low visible light reflectivity for light inside the vehicle within the incident angle range of 0° to 70°.

[0103] The laminated window glass 1000 provided in Comparative Example 3 includes a first infrared blocking layer 200, but its transparent conductive oxide layer 210 is not in direct contact with the first absorption layer 220, resulting in its inner visible light reflectivity RLint being greater than 4% at incident angles of 0°, 20°, and 40°. Therefore, it can be seen that the laminated window glass 1000 provided in Comparative Example 3 cannot meet the requirement for a low visible light reflectivity for interior vehicle light within the incident angle range of 0° to 40°.

[0104] The laminated window glass 1000 provided in Example 1 includes a first infrared blocking layer 200, and has a visible light transmittance TL ≤ 10%, a total solar energy transmittance Tts ≤ 25%, an emissivity e ≤ 0.25, and an inner visible light reflectivity RLint of ≤ 3%, ≤ 2%, ≤ 2%, ≤ 6%, and ≤ 15% at incident angles of 0°, 20°, 40°, 60°, and 70°, respectively. It can be seen that the laminated window glass 1000 provided in Example 1 can meet the comprehensive requirements of good thermal insulation effect, good low-emissivity effect, low visible light transmittance, and low reflectivity for light inside the vehicle within the incident angle range of 0° to 70°.

[0105] The laminated window glass 1000 provided in Example 2 includes a first infrared blocking layer 200, and its visible light transmittance TL is ≤15%, the total solar energy transmittance Tts is ≤30%, the emissivity e is 0.35≤0.5, and the inner visible light reflectivity RLint is ≤3%, ≤2%, ≤2%, ≤6%, and ≤15% at incident angles of 0°, 20°, 40°, 60°, and 70°, respectively. It can be seen that the laminated window glass 1000 provided in Example 2 can meet the comprehensive requirements of good thermal insulation effect, good low-emissivity effect, low visible light transmittance, and low visible light reflectivity for light inside the vehicle within the incident angle range of 0° to 70°.

[0106] The difference between the visible light transmittance of the laminated window glass 1000 provided in Examples 1-2 and the visible light transmittance of the laminated window glass 1000 not provided with the first infrared blocking layer 200 provided in Comparative Example 1 is greater than or equal to 10%, or even greater than or equal to 20%. Providing the first infrared blocking layer 200 of the present 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, thereby reducing production costs.

[0107] Examples 3-7

[0108] The laminated window glass 1000 in Example 3-7 includes a 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 a 2.1 mm thick transparent glass (visible light transmittance ≥ 80%), the adhesive layer 120 is a 0.76 mm thick transparent PVB (visible light transmittance ≥ 80%), the inner glass plate 130 is a 2.1 mm thick gray glass (visible light transmittance ≤ 30%), the first infrared blocking layer 200 is arranged on the fourth surface 132 of the inner glass plate 130, and the second infrared blocking layer 300 is arranged on the second surface 112 of the outer glass plate 110.

[0109] Example 3:

[0110] The first infrared blocking layer 200 is formed by sequentially stacking Nb2O5 (29 nm) / SiO on the fourth surface 132. x (31.2nm) / ITO(215.3nm) / NiCr(5.8nm) / SiO x (53.4nm) / SiN x (19.5nm);

[0111] The second infrared blocking layer 300 is formed by sequentially stacking ZnSnO on the second surface 112. x (25.3nm) / AZO(12.3nm) / Ag(10.8nm) / AZO(10nm) / ZnSnO x (23.5nm) / SiN x (14.6 nm), the second infrared blocking layer 300 includes a silver layer.

[0112] Example 4:

[0113] The first infrared blocking layer 200 is a layer of TiO 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);

[0114] The second infrared blocking layer 300 is formed by sequentially stacking ZnSnO 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) / ZnSnOx (23.5nm) / SiN x (14.6 nm), the second infrared blocking layer 300 includes two silver layers.

[0115] Example 5:

[0116] The first infrared blocking layer 200 is formed by sequentially stacking TiO2 (29 nm) / SiO x (28.6nm) / ITO(218.5nm) / NiCr(5.8nm) / SiO x (46.6nm) / SiZrAlN x (19.7nm);

[0117] The second infrared blocking layer 300 is formed by sequentially stacking ZnSnO 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) / ZnSnO x (23.5nm) / SiN x (14.6 nm), the second infrared blocking layer 300 includes three silver layers.

[0118] Example 6:

[0119] The first infrared blocking layer 200 is formed by sequentially stacking Nb2O5 (29 nm) / SiO on the fourth surface 132. x (31.2nm) / ITO(215.3nm) / NiCr(5.8nm) / SiO x (53.4nm) / SiN x (19.5nm).

[0120] The second infrared blocking layer 300 is formed by sequentially stacking ZnSnO 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) / ZnSnOx (23.5nm) / SiN x (14.6 nm), the second infrared blocking layer 300 includes three silver layers.

[0121] Example 7:

[0122] The first infrared blocking layer 200 is formed by sequentially stacking ZnSnO 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);

[0123] The second infrared blocking layer 300 is formed by sequentially stacking ZnSnO 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 (11.9 nm), the second infrared blocking layer 300 includes three silver layers.

[0124] Prepare the outer glass plate 110, adhesive layer 120 and inner glass plate 130 of Example 3-7, deposit the corresponding first infrared blocking layer 200 on the fourth surface 132 of the inner glass plate 130 by a magnetron sputtering process, and deposit the corresponding second infrared blocking layer 300 on the second surface 112 of the outer glass plate 110 by a magnetron sputtering process, and then process and manufacture according to the vehicle glass production process to obtain the laminated window glass 1000 of Example 3-7.

[0125] The visible light transmittance TL, direct sunlight transmittance TE, total solar energy transmittance Tts, emissivity e, inner visible light reflectance RLint, and transmittance index A of the laminated window glass 1000 in Examples 3-7 were measured and calculated, as well as the visible light transmittance TL1 of the inner glass panel 130 deposited with the first infrared blocking layer 200.

[0126] Visible light transmittance TL: The visible light transmittance of laminated window glass 1000 is measured and calculated according to standard ISO9050;

[0127] Visible light transmittance TL1: The visible light transmittance of the inner glass plate 130 and the first infrared blocking layer 200 is measured and calculated according to the ISO 9050 standard;

[0128] Solar transmittance TE: The solar transmittance of laminated window glass 1000 is measured and calculated according to the standard ISO9050;

[0129] Transmittance index A: calculated according to the formula A = TL / (TE*TL1);

[0130] Total solar transmittance Tts: The total solar transmittance of laminated window glass 1000 is measured and calculated according to standard ISO9050;

[0131] Emissivity e: measured from the inner glass panel side, using a Fourier transform infrared spectrometer and calculated and calibrated according to standard EN12898;

[0132] Inner side visible light reflectance RLint: measured from the inner glass pane side, calculated according to standard ISO9050, the reflectance of the laminated window glass 1000 for visible light incident at angles of 0°, 20°, 40°, 60° and 70° respectively;

[0133] The measurement results of Examples 3-7 are recorded in Table 2.

[0134] Table 2: Measurement results of Examples 3-7

[0135]

[0136]

[0137] 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, and has a visible light transmittance TL ≤ 12% or even ≤ 6%, a total solar energy transmittance Tts ≤ 20% or even ≤ 15%, an emissivity e ≤ 0.25 or even ≤ 0.20, and an inner visible light reflectance RLint of ≤ 4%, ≤ 3%, ≤ 3%, ≤ 6%, and ≤ 15% at incident angles of 0°, 20°, 40°, 60°, and 70°, respectively. It can be seen that the laminated window glass 1000 provided in Examples 3-7 can meet the comprehensive requirements of good thermal insulation effect, good low-emissivity effect, low visible light transmittance, and low visible light reflectance for interior vehicle light within the incident angle range of 0° to 70°.

[0138] Compared with Example 3 including only one silver layer, the total solar transmittance Tts of the laminated window glass 1000 provided by Examples 4-7 including two or three silver layers is significantly reduced to ≤15%, or even to 13%, with a more excellent thermal insulation effect.

[0139] The laminated window glass 1000 provided in Examples 3-7 includes a first infrared blocking layer 200 and a second infrared blocking layer 300, and has a transmittance index A greater than 8. This enables the laminated window glass 1000 to meet the comprehensive requirements of excellent thermal insulation, low visible light transmittance, and low visible light reflectance for vehicle interior light within the 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, or even greater than or equal to 30.

[0140] Examples 8-11

[0141] The laminated window glass 1000 in Examples 8-11 includes a 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 a 2.1 mm thick transparent glass (visible light transmittance ≥ 80%), the adhesive layer 120 is a 0.76 mm thick transparent PVB (visible light transmittance ≥ 80%), the inner glass plate 130 is a 2.1 mm thick gray glass (visible light transmittance ≤ 30%), the first infrared blocking layer 200 is arranged on the fourth surface 132 of the inner glass plate 130, and the second infrared blocking layer 300 is arranged on the second surface 112 of the outer glass plate 110.

[0142] Example 8:

[0143] The first infrared blocking layer 200 is a layer of TiO stacked on the fourth surface 132. x (51.1nm) / SiO x (30.3nm) / ITO(70.2nm) / NiCr(7.3nm) / SiO x (108.8nm);

[0144] The second infrared blocking layer 300 is formed by sequentially stacking ZnSnO 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 (14.6 nm), the second infrared blocking layer 300 includes three silver layers.

[0145] Example 9:

[0146] The 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);

[0147] The second infrared blocking layer 300 is formed by sequentially stacking ZnSnO 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 (14.6 nm), the second infrared blocking layer 300 includes three silver layers.

[0148] Example 10:

[0149] The first infrared blocking layer 200 is formed by sequentially stacking ZnSnO on the fourth surface 132. x (161.8nm) / NiCr(6.4nm) / SiO x (48.9nm) / SiN x (18.5nm);

[0150] The second infrared blocking layer 300 is formed by sequentially stacking ZnSnO 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 (14.6 nm), the second infrared blocking layer 300 includes three silver layers.

[0151] Example 11:

[0152] The first infrared blocking layer 200 is formed by sequentially stacking HAZO (148.9 nm) / NiCr (4.9 nm) / SiO on the fourth surface 132. x (48.9nm) / SiN x (18.5nm);

[0153] The second infrared blocking layer 300 is formed by sequentially stacking ZnSnO 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 (14.6 nm), the second infrared blocking layer 300 includes two silver layers.

[0154] The outer glass plate 110, adhesive layer 120 and inner glass plate 130 of Examples 8-11 are prepared, and a corresponding first infrared blocking layer 200 is deposited on the fourth surface 132 of the inner glass plate 130 by a magnetron sputtering process, and a corresponding second infrared blocking layer 300 is deposited on the second surface 112 of the outer glass plate 110 by a magnetron sputtering process. Then, the laminated window glass 1000 of Examples 8-11 is obtained by processing and manufacturing according to the vehicle glass production process.

[0155] The visible light transmittance TL, direct sunlight transmittance TE, total solar energy transmittance Tts, emissivity e, inner visible light reflectance RLint, and transmittance index A of the laminated window glass 1000 in Examples 8-11 were measured and calculated, as well as the visible light transmittance TL1 of the inner glass panel 130 deposited with the first infrared blocking layer 200.

[0156] Visible light transmittance TL: The visible light transmittance of laminated window glass 1000 is measured and calculated according to standard ISO9050;

[0157] Visible light transmittance TL1: The visible light transmittance of the inner glass plate 130 and the first infrared blocking layer 200 is measured and calculated according to the ISO 9050 standard;

[0158] Solar transmittance TE: The solar transmittance of laminated window glass 1000 is measured and calculated according to the standard ISO9050;

[0159] Transmittance index A: calculated according to the formula A = TL / (TE*TL1);

[0160] Total solar transmittance Tts: The total solar transmittance of laminated window glass 1000 is measured and calculated according to standard ISO9050;

[0161] Emissivity e: measured from the inner glass pane using a Fourier transform infrared spectrometer and calculated and calibrated according to standard EN12898;

[0162] Inner side visible light reflectance RLint: measured from the inner glass pane side, calculated according to standard ISO9050, the reflectance of the laminated window glass 1000 for visible light incident at angles of 0°, 20°, 40°, 60° and 70° respectively;

[0163] The measurement results of Examples 8-11 are recorded in Table 3.

[0164] Table 3: Measurement results of Examples 8-11

[0165]

[0166] 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, and has a visible light transmittance TL ≤ 12%, a total solar energy transmittance Tts ≤ 16%, an emissivity e ≤ 0.5 of 0.35, and an inner visible light reflectivity RLint of ≤ 4%, ≤ 3%, ≤ 3%, ≤ 6%, and ≤ 15% at incident angles of 0°, 20°, 40°, 60°, and 70°, respectively. It can be seen that the laminated window glass 1000 provided in Examples 8-11 can meet the comprehensive requirements of good thermal insulation effect, good low-emissivity effect, low visible light transmittance, and low visible light reflectivity for light inside the vehicle within the incident angle range of 0° to 70°.

[0167] Compared with Examples 8-9, the laminated window glass 1000 provided in Examples 10-11 has two additional NiCr absorption layers provided in the second infrared blocking layer 300, which reduces the visible light transmittance of the laminated window glass 1000 provided in Examples 10-11 and the visible light reflectance of the light from the interior of the vehicle within the incident angle range of 0° to 40°, so that the visible light transmittance TL of the laminated window glass 1000 provided in Examples 10-11 is ≤10%, and the inner visible light reflectance RLint is ≤2% or even ≤1% at incident angles of 0°, 20°, and 40°.

[0168] The laminated window glass 1000 provided in Examples 8-11 includes a first infrared blocking layer 200 and a second infrared blocking layer 300, and has a transmittance index A greater than 8. This enables the laminated window glass 1000 to meet the comprehensive requirements of excellent thermal insulation, low visible light transmittance, and low visible light reflectance for vehicle interior light within the 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, and more preferably greater than or equal to 15.

[0169] The above content provides a detailed description of the laminated window glass of the present application. However, the present application is not limited to the specific implementation methods described above. Therefore, any improvements, equivalent modifications and replacements based on the technical points of the present application shall fall within the scope of protection of the present application.

Claims

1. A laminated window glass, characterized in that: The glass panel comprises an outer glass panel, an adhesive layer, an inner glass panel, and a first infrared blocking layer. The outer glass panel comprises a first surface and a second surface opposite to each other, the inner glass panel comprises a third surface and a fourth surface 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. When the incident angle θ of visible light is 60°<θ≤70°, the inner side visible light reflectivity of the laminated window glass is less than or equal to 16%.

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

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

4. The laminated window glass according to claim 1, wherein: The visible light transmittance of the laminated window glass is less than or equal to 16%, the visible light transmittance of the outer glass plate is greater than or equal to 70%, and the visible light transmittance of the inner glass plate 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, wherein: 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, and the refractive index of the first low-refractive index layer is less than 1.

9.

7. The laminated window glass according to claim 6, wherein: The material of the transparent conductive oxide layer is selected from ITO, NiCrO x 、FTO、ZnSnO x , at least one of doped zinc oxide, wherein the doping element in the doped zinc oxide is at least one of aluminum, tungsten, hafnium, gallium, yttrium, niobium, and neodymium.

8. The laminated window glass according to claim 6, wherein: The material of the first absorption layer is selected from at least one of NiCr, NiAl, NiSi, Cr, TiN, NbN, and MoTi.

9. The laminated window glass according to claim 6, wherein: The transparent conductive oxide layer has a thickness of 50 nm to 300 nm, the first absorption layer has a thickness of 2 nm to 30 nm, and the first low refractive index layer has a thickness of 10 nm to 300 nm.

10. The laminated window glass according to claim 6, wherein: 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.

11. The laminated window glass according to claim 6, wherein: 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. The second low refractive index layer is farther away from the fourth surface than the first low refractive index layer.

12. The laminated window glass according to claim 6, wherein: The first infrared blocking layer also includes at least one stacked structure, which is arranged 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.

13. The laminated window glass according to claim 6 or 11, characterized in that The first infrared blocking layer also includes an outermost high refractive index layer, which is the layer farthest 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.

14. The laminated window glass according to claim 13, wherein: 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.

15. The laminated window glass according to claim 1, wherein The emissivity of the laminated window glass is 0.35 to 0.5 when measured from the inner glass panel side.

16. The laminated window glass according to claim 1, wherein The emissivity of the laminated window glass is less than 0.35 as measured from the inner glass pane side.

17. The laminated window glass according to claim 1, wherein: The laminated window glass also includes a second infrared blocking layer, which is arranged 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, and the material of the metal layer is a metal or metal alloy selected from at least one element of Ag, Au, Cu, Al, and Pt.

18. The laminated window glass according to claim 17, wherein: The second infrared blocking layer further includes at least one NiCr absorption layer, and the thickness of the NiCr absorption layer is greater than or equal to 3 nm.

19. The laminated window glass according to claim 17, wherein: The transmittance index A of the laminated window glass is greater than 8, and the transmittance index A is calculated according to the formula A=TL / (TE*TL1), wherein 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 panel and the first infrared blocking layer together.

20. The laminated window glass according to claim 19, wherein The transmittance index A of the laminated glazing is greater than or equal to 10.

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