Coated glass and car window glass

Abstract

The application provides a coated glass and a vehicle window glass. The coated glass comprises a substrate and a low-transmittance thermal insulation layer arranged on at least one surface of the substrate, the low-transmittance thermal insulation layer comprises at least two medium layers and at least two absorption functional layers arranged in a stack, and each absorption functional layer is located between two adjacent medium layers; the visible light transmittance of the coated glass is less than or equal to 15%. The application sets the low-transmittance thermal insulation layer, so that the coated glass has a low visible light transmittance TL and a low emissivity e, can replace a dark PVB film in the related art, and has the effects of low cost, simple manufacturing and production, and privacy protection. In addition, the coated glass can be used alone as the vehicle window glass or be made into the vehicle window glass as the vehicle window glass, can block heat, and the setting of a sunshade curtain in a vehicle is omitted, so that a greater internal height space of the vehicle is obtained, and the use experience of a user is improved.

Description

Technical Field

[0001] This application belongs to the field of glass technology, specifically relating to coated glass and automotive window glass. Background Technology

[0002] As the market demand for new energy vehicles grows, people are increasingly demanding higher standards for vehicle windows to better showcase their intelligence and functionality. In vehicles, to meet the privacy and light-blocking requirements of window glass, dark PVB films and / or dark-tinted glass are often used to absorb visible light and reduce transmittance. However, the high cost of PVB films contributes to the overall high cost of vehicles.

[0003] Furthermore, because the power battery pack is installed in the chassis of new energy vehicles, the interior height is reduced. Therefore, sunshades are omitted in related technologies to gain more interior height. However, this allows solar heat from outside the vehicle to enter the cabin through the windows, significantly reducing passenger comfort and user experience. Summary of the Invention

[0004] In view of this, the first aspect of this application provides a coated glass, the coated glass including a substrate and a low-transmittance heat insulation layer disposed on at least one surface of the substrate, the low-transmittance heat insulation layer including at least two dielectric layers and at least two absorption functional layers stacked thereon, each of the absorption functional layers being located between two adjacent dielectric layers;

[0005] The visible light transmittance of the coated glass is less than or equal to 15%.

[0006] The low-transmittance heat insulation layer further includes an outermost low-refractive-index layer, which is disposed furthest from the substrate, and the refractive index of the outermost low-refractive-index layer is less than or equal to 1.7.

[0007] The low-transmittance heat insulation layer does not include a transparent conductive oxide layer. The material of the transparent conductive oxide layer is ITO (indium tin oxide), FTO (fluorine-doped tin oxide), YZO (yttrium-doped zinc oxide), HAZO (hafnium and aluminum-doped zinc oxide), WAZO (tungsten and aluminum-doped zinc oxide), or GZO (gallium-doped zinc oxide).

[0008] The material of the dielectric layer 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.

[0009] Wherein, the refractive index of the dielectric layer is greater than or equal to 1.8; or, the refractive index of the dielectric layer is greater than or equal to 2.0; or, the refractive index of the dielectric layer is greater than or equal to 2.2.

[0010] The material of the absorption functional layer is selected from at least one element selected from Si, Ni, Cr, Al, Ti, Nb, Mo, Sn, Zn, Zr, Mg, as well as its elemental composition, alloy, oxide, nitride, or nitrogen oxide.

[0011] The physical thickness of the low-permeability heat insulation layer is 150nm to 500nm, or 200nm to 400nm, or 220nm to 300nm.

[0012] The total physical thickness of the absorption functional layer is 15nm to 100nm, or 18nm to 80nm, or 20nm to 60nm.

[0013] The physical thickness of the outermost low-refractive-index layer is ≥20nm, ≥40nm, or ≥60nm.

[0014] The physical thickness of the dielectric layer closest to the substrate in the low-transmittance heat insulation layer is 20nm to 100nm, or 25nm to 90nm, or 30nm to 80nm.

[0015] The physical thickness of the dielectric layer located between two adjacent absorption functional layers in the low-permeability heat insulation layer is 20nm to 100nm, or 30nm to 80nm, or 35nm to 75nm.

[0016] The physical thickness of the absorption functional layer closest to the substrate is 5nm to 35nm, or 8nm to 30nm, or 10nm to 25nm.

[0017] The physical thickness of the absorption functional layer furthest from the substrate is less than the physical thickness of the absorption functional layer closest to the substrate.

[0018] The physical thickness of the absorption functional layer furthest from the substrate is 1 nm to 16 nm, or 2 nm to 12 nm, or 3 nm to 8 nm.

[0019] The ratio of the physical thickness of the absorption functional layer furthest from the substrate to the physical thickness of the absorption functional layer closest to the substrate is 0.3 to 0.9, or 0.35 to 0.85.

[0020] The low-permeability heat insulation layer includes at least three absorption functional layers, and the physical thickness of the absorption functional layer located between two adjacent absorption functional layers is 5nm to 30nm, or 7.5nm to 25nm.

[0021] The outermost low-refractive-index layer is in direct contact with the absorption functional layer furthest from the substrate.

[0022] The dielectric layer is provided between the outermost low refractive index layer and the absorption functional layer furthest from the substrate; the physical thickness of the dielectric layer is 5nm to 50nm, or 8nm to 40nm, or 10nm to 35nm.

[0023] Wherein, the physical thickness of the outermost low refractive index layer is greater than the physical thickness of the dielectric layer; or, the ratio of the physical thickness of the outermost low refractive index layer to the physical thickness of the dielectric layer is 1.2 to 5, or 1.5 to 4.5, or 2 to 4.

[0024] The substrate is made of soda-lime glass, high-alumina glass, lithium aluminum glass, borosilicate glass, polyethylene terephthalate, or polycarbonate.

[0025] The substrate is transparent glass, ultra-transparent glass, or light-colored glass. The visible light transmittance of the transparent glass is greater than or equal to 80%, the visible light transmittance of the ultra-transparent glass is greater than or equal to 90%, and the visible light transmittance of the light-colored glass is greater than or equal to 70%.

[0026] Specifically, the emissivity e of the coated glass measured from the side of the low-transmittance heat insulation layer is 0.36≤e<0.5, or 0.40≤e≤0.48.

[0027] The emissivity e of the coated glass, measured from the side of the low-transmittance heat insulation layer, is 0.10 ≤ e ≤ 0.35, or 0.2 ≤ e ≤ 0.3.

[0028] Wherein, the visible light transmittance TL of the coated glass is ≤10%, or ≤8%, or ≤5%, or ≤2%.

[0029] Wherein, the visible light reflectance RL of the coated glass is ≤5%, or ≤3%, or ≤2%, or ≤1%.

[0030] The second aspect of this application provides a vehicle window glass, the vehicle window glass including a first glass plate, an adhesive layer, and a coated glass as provided in the first aspect of this application, the first glass plate having a first side and a second side, the substrate having a third side and a fourth side, the adhesive layer connecting the second side and the third side, the substrate having a thickness of 0.7 mm to 3.5 mm, and the low-transmittance heat insulation layer being disposed on the fourth side.

[0031] The third aspect of this application provides a vehicle window glass, wherein the vehicle window glass is only the coated glass provided in the first aspect of this application, and the thickness of the substrate is 2.5mm to 8mm.

[0032] The coated glass and window glass provided in this application, by incorporating a low-transmittance heat-insulating layer, achieve lower visible light transmittance (TL) and lower emissivity (e) in the coated glass. This can replace the dark PVB film in related technologies, thus providing the coated glass with low cost, simple manufacturing, and privacy protection. Furthermore, the coated glass can be used alone as window glass or manufactured as a whole for window glass, effectively blocking heat and eliminating the need for interior sunshades, thereby creating more interior height and improving the user experience. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments of this application will be described below.

[0034] Figure 1 This is a schematic diagram of the structure of the coated glass provided in one embodiment of this application.

[0035] Figure 2 This is a schematic diagram of the structure of a coated glass provided in another embodiment of this application.

[0036] Figure 3 This is a schematic diagram of the structure of a coated glass provided in another embodiment of this application.

[0037] Figure 4 This is a schematic diagram of the structure of a vehicle window glass provided in one embodiment of this application.

[0038] Labeling explanation: Coated glass 1, substrate 10, low-transmittance heat insulation layer 20, dielectric layer 21, absorption functional layer 22, low refractive index layer 23, window glass 2, first glass plate 11, first surface 111, second surface 112, adhesive layer 12, third surface 131, fourth surface 132. Detailed Implementation

[0039] The following are preferred embodiments of this application. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

[0040] Unless otherwise stated or in case of conflict, the terms or phrases used in this application shall have the following meanings:

[0041] In this application, terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0042] In this application, "one or more" refers to any one, any two, or any two or more of the listed items. "Several" refers to any two or more.

[0043] The value of x in the chemical formula: If it is clearly defined, the defined range shall prevail. If it is not clearly defined, it can be determined according to the stoichiometric, substoichiometric, or superstoichiometric deposition methods used in the magnetron sputtering process.

[0044] Refractive index: The refractive index measured at a wavelength of 550 nm.

[0045] In view of this, in order to solve the above problems, please refer to the following: Figures 1-3 This application provides a coated glass 1, which includes a substrate 10 and a low-transmittance heat insulation layer 20 disposed on at least one surface of the substrate 10. The low-transmittance heat insulation layer 20 includes at least two dielectric layers 21 and at least two absorption functional layers 22 stacked together, with each absorption functional layer 22 located between two adjacent dielectric layers 21. The visible light transmittance of the coated glass 1 is less than or equal to 15%.

[0046] Furthermore, the low-transmittance heat insulation layer 20 also includes an outermost low-refractive-index layer 23, which is disposed furthest from the substrate 10, and the refractive index of the outermost low-refractive-index layer 23 is less than or equal to 1.7.

[0047] A low-transmittance heat-insulating layer 20 is disposed on a substrate 10, the substrate 10 being made of soda-lime glass, high-alumina glass, lithium aluminum glass, borosilicate glass, polyethylene terephthalate, or polycarbonate. The coated glass 1 can be used independently as a vehicle window glass, or it can be manufactured as a vehicle window glass and then used as such. Preferably, the coated glass 1 is applied to a vehicle sunroof. However, it is not limited to this; the coated glass 1 can also be applied to a rear windshield, side window, rear door window, or corner window.

[0048] The substrate is transparent glass, ultra-transparent glass, or light-colored glass. The visible light transmittance of the transparent glass is greater than or equal to 80%, the visible light transmittance of the ultra-transparent glass is greater than or equal to 90%, and the visible light transmittance of the light-colored glass is greater than or equal to 70%.

[0049] like Figure 1As shown, the low-transmittance heat insulation layer 20 can be composed of two dielectric layers 21, two absorption functional layers 22, and an outermost low refractive index layer 23; for example, it can be composed of "dielectric layer 21 / absorption functional layer 22 / dielectric layer 21 / absorption functional layer 22 / outermost low refractive index layer 23". Alternatively, the low-transmittance heat insulation layer 20 can also be composed of three dielectric layers 21, two absorption functional layers 22, and an outermost low refractive index layer 23, for example, it can be composed of "dielectric layer 21 / absorption functional layer 22 / dielectric layer 21 / absorption functional layer 22 / dielectric layer 21 / outermost low refractive index layer 23".

[0050] like Figure 2 As shown, the low-transmittance heat insulation layer 20 can also be composed of three dielectric layers 21, three absorption functional layers 22, and an outermost low refractive index layer 23; for example, it can be composed of "dielectric layer 21 / absorption functional layer 22 / dielectric layer 21 / absorption functional layer 22 / dielectric layer 21 / absorption functional layer 22 / outermost low refractive index layer 23". Alternatively, the low-transmittance heat insulation layer 20 can also be composed of four dielectric layers 21, three absorption functional layers 22, and an outermost low refractive index layer 23; for example, it can be composed of "dielectric layer 21 / absorption functional layer 22 / dielectric layer 21 / absorption functional layer 22 / dielectric layer 21 / absorption functional layer 22 / dielectric layer 21 / outermost low refractive index layer 23".

[0051] like Figure 3 As shown, the low-transmittance heat insulation layer 20 can also be composed of four dielectric layers 21, four absorption functional layers 22, and an outermost low refractive index layer 23; for example, it can be composed of "dielectric layer 21 / absorption functional layer 22 / dielectric layer 21 / absorption functional layer 22 / dielectric layer 21 / absorption functional layer 22 / dielectric layer 21 / absorption functional layer 22 / outermost low refractive index layer 23". Alternatively, the low-transmittance heat insulation layer 20 can also be composed of five dielectric layers 21, four absorption functional layers 22, and an outermost low refractive index layer 23; for example, it can be composed of "dielectric layer 21 / absorption functional layer 22 / dielectric layer 21 / absorption functional layer 22 / dielectric layer 21 / absorption functional layer 22 / dielectric layer 21 / absorption functional layer 22 / dielectric layer 21 / outermost low refractive index layer 23".

[0052] Optionally, in the low-permeability insulation layer 20, the number of dielectric layers 21 is 2 to 6, specifically 2, 3, 4, 5, or 6; the number of absorption functional layers 22 is 2 to 5, specifically 2, 3, 4, or 5. The ratio of the number of dielectric layers 21 to the number of absorption functional layers 22 is 1.0 to 1.5, that is, the number of dielectric layers 21 is greater than or equal to the number of absorption functional layers 22, specifically 1.0, 1.1, 1.2, 1.3, 1.4, or 1.5, etc.

[0053] The dielectric layer 21 protects the absorption layer 22 and adjusts the mechanical properties, chemical resistance, high-temperature heat treatment resistance, optical properties, and appearance of the low-transmittance heat insulation layer 20. The material of the dielectric layer 21 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. Specific examples include SiNx, SiOx, ZnSnOx, TiOx, SiNx, ZrOx, and NbOx. In some embodiments, the refractive index of the dielectric layer 21 is ≥1.8, specifically 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, or 2.7. Preferably, the refractive index of the dielectric layer 21 is ≥2.0, ≥2.2, or ≥2.4.

[0054] The absorption layer 22 is used to reduce the visible light transmittance and emissivity of the coated glass 1. The material of the absorption layer 22 is selected from at least one element selected from Si, Ni, Cr, Al, Ti, Nb, Mo, Sn, Zn, Zr, and Mg, or an alloy, oxide, nitride, or oxynitride. Meanwhile, the low-transmittance heat insulation layer 20 is exposed on the substrate 10, and the absorption layer 22 is not selected from silver, silver alloys, or gold.

[0055] In some embodiments, the material of the absorbing functional layer 22 is selected from at least one element or alloy of Si, Ni, Cr, Al, Ti, Nb, Mo, Sn, Zn, Zr, Mg, such as NiCr, Si, TiZr, ZnSn, Nb, etc.

[0056] In other embodiments, the material of the absorbent functional layer 22 is selected from at least one substoichiometric oxide, substoichiometric nitride, or substoichiometric nitrogen oxide of Si, Ni, Cr, Al, Ti, Nb, Mo, Sn, Zn, Zr, and Mg, such as substoichiometric NiCrOx, substoichiometric NiCrNx, etc.

[0057] The outermost low-refractive-index layer 23 works in conjunction with the dielectric layer 21 to reduce the visible light reflectivity of the coated glass 1. When the coated glass 1 is installed in a vehicle, the low-transmittance heat-insulating layer 20 faces the vehicle's interior space, reducing the visible light reflectivity of the coated glass 1 inside the vehicle. The refractive index of the outermost low-refractive-index layer 23 is less than or equal to 1.7, specifically examples being 1.7, 1.6, 1.5, 1.4, 1.3, or 1.2, etc. Preferably, the refractive index of the outermost low-refractive-index layer 23 is ≤1.6 or ≤1.4. The material of the outermost low-refractive-index layer 23 is selected from oxides of at least one element selected from Al, Mg, Zn, Si, Zr, Sn, Ca, and V. Specific examples include Al2O3, SiO2, SiBOx, SiTiOx, SiAlOx, and SiZrOx.

[0058] The physical thickness of the low-transmittance heat insulation layer 20 is 150nm to 500nm, which helps to balance the performance and production cost of the low-transmittance heat insulation layer 20. Specific examples include 150nm, 160nm, 170nm, 180nm, 190nm, 200nm, 210nm, 220nm, 230nm, 240nm, 250nm, 260nm, 270nm, 280nm, 290nm, 300nm, 350nm, 400nm, 450nm, or 500nm, etc. Preferably, the physical thickness of the low-transmittance heat insulation layer 20 is 200nm to 400nm. More preferably, the physical thickness of the low-transmittance heat insulation layer 20 is 220nm to 300nm.

[0059] The total physical thickness of the absorption functional layer 22 is 15nm to 100nm, which helps to balance the performance and production cost of the low-transparency heat insulation layer 20. Specific examples include 15nm, 18nm, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm, or 100nm. Preferably, the total physical thickness of the absorption functional layer 22 is 18nm to 80nm. More preferably, the total physical thickness of the absorption functional layer 22 is 20nm to 60nm. If the total physical thickness of the absorption functional layer 22 is too small, the low-transparency heat insulation layer 20 will not be able to achieve its intended function. If the total physical thickness of the absorption functional layer 22 is too large, the production difficulty and cost of the low-transparency heat insulation layer 20 will increase. Compared with low-emissivity layers in related technologies, the total physical thickness of transparent conductive oxide layers is usually greater than 100nm, or even greater than 200nm. The absorption functional layer 22 provided in this application has a thinner total physical thickness, which can significantly reduce production costs and improve production efficiency.

[0060] The physical thickness of the outermost low-refractive-index layer 23 is ≥20nm, specifically, examples include 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm, or 100nm, etc. Preferably, the physical thickness of the outermost low-refractive-index layer 23 is ≥40nm, more preferably ≥60nm. If the physical thickness of the outermost low-refractive-index layer 23 is too small, it will be difficult to reduce the visible light reflectivity inside the coated glass 1. From the perspective of production convenience, the physical thickness of the outermost low-refractive-index layer 23 is ≤200nm, preferably ≤150nm, more preferably ≤120nm.

[0061] The physical thickness of the dielectric layer 21 closest to the substrate 10 is 20nm to 100nm, specifically, examples include 20nm, 25nm, 30nm, 35nm, 40nm, 45nm, 50nm, 55nm, 60nm, 65nm, 70nm, 75nm, 80nm, 85nm, 90nm, 95nm, or 100nm. This dielectric layer 21 closest to the substrate 10 is also called the innermost dielectric layer 21. The innermost dielectric layer 21 is located between the substrate 10 and the innermost absorption functional layer 22, and is in direct contact with the substrate 10. The innermost dielectric layer 21 serves to protect the innermost absorption functional layer 22 and improve the mechanical properties of the low-transmittance heat insulation layer 20. Preferably, the physical thickness of the dielectric layer 21 closest to the substrate 10 is 25nm to 90nm, and more preferably, the physical thickness of the dielectric layer 21 closest to the substrate 10 is 30nm to 80nm.

[0062] The physical thickness of the dielectric layer 21 located between two adjacent absorption functional layers 22 is 20nm to 100nm, specifically, examples include 20nm, 25nm, 30nm, 35nm, 40nm, 45nm, 50nm, 55nm, 60nm, 65nm, 70nm, 75nm, 80nm, 85nm, 90nm, 95nm, or 100nm. This dielectric layer 21 located between two adjacent absorption functional layers 22 is also referred to as the intermediate dielectric layer 21. The intermediate dielectric layer 21 is used to protect the absorption functional layers 22 and to adjust the mechanical properties, optical properties, and appearance color of the low-transmittance heat insulation layer 20. Preferably, the physical thickness of the dielectric layer 21 closest to the substrate 10 is 30nm to 80nm, and more preferably, the physical thickness of the dielectric layer 21 closest to the substrate 10 is 35nm to 75nm.

[0063] The physical thickness of the absorption functional layer 22 closest to the substrate 10 is 5nm to 35nm, specifically, examples include 35nm, 30nm, 25nm, 20nm, 15nm, 10nm, or 5nm. This absorption functional layer 22 closest to the substrate 10 is also referred to as the innermost absorption functional layer 22. If the thickness of the innermost absorption functional layer 22 is too small, it is not conducive to achieving the intended function of the low-transmittance heat insulation layer 20; if the thickness of the innermost absorption functional layer 22 is too large, it is not conducive to the film system design and manufacturing of the low-transmittance heat insulation layer 20. Preferably, the physical thickness of the absorption functional layer 22 closest to the substrate 10 is 8nm to 30nm. More preferably, the physical thickness of the absorption functional layer 22 closest to the substrate 10 is 10nm to 25nm.

[0064] The physical thickness of the absorption functional layer 22 furthest from the substrate 10 is less than the physical thickness of the absorption functional layer 22 closest to the substrate 10. Specifically, the physical thickness of the absorption functional layer 22 furthest from the substrate 10 is 1 nm to 16 nm, and examples include 16 nm, 15 nm, 13 nm, 12 nm, 10 nm, 8 nm, 6 nm, 5 nm, 3 nm, or 1 nm. This absorption functional layer 22 furthest from the substrate 10 is also referred to as the outermost absorption functional layer 22. If the thickness of the outermost absorption functional layer 22 is too small, it will be detrimental to achieving the intended function of the low-transmittance heat insulation layer 20 and increase manufacturing difficulty. If the thickness of the outermost absorption functional layer 22 is too large, it will result in excessive visible light reflectivity of the coated glass 1 inside the vehicle, leading to severe reflections inside the vehicle. Preferably, the physical thickness of the absorption functional layer 22 furthest from the substrate 10 is 2 nm to 12 nm. More preferably, the physical thickness of the absorption functional layer 22 furthest from the substrate 10 is 3 nm to 8 nm.

[0065] The ratio of the physical thickness of the absorption functional layer 22 furthest from the substrate 10 to the physical thickness of the absorption functional layer 22 closest to the substrate 10 is 0.3 to 0.9, specifically, for example, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, or 0.9, etc. More preferably, the ratio of the physical thickness of the absorption functional layer 22 furthest from the substrate 10 to the physical thickness of the absorption functional layer 22 closest to the substrate 10 is 0.35 to 0.85.

[0066] In some embodiments, the low-permeability heat insulation layer 20 includes at least three absorption functional layers 22, and the physical thickness of the absorption functional layer 22 located between two adjacent absorption functional layers 22 is 5 nm to 30 nm. The absorption functional layer 22 located between the innermost and outermost absorption functional layers 22 is also referred to as the intermediate absorption functional layer 22. The low-permeability heat insulation layer 20 includes at least one intermediate absorption functional layer 22. If the thickness of the intermediate absorption functional layer 22 is too small, it is not conducive to achieving the intended function of the low-permeability heat insulation layer 20; if the thickness of the intermediate absorption functional layer 22 is too large, it is not conducive to the membrane system design and manufacturing of the low-permeability heat insulation layer 20. Preferably, the physical thickness of the intermediate absorption functional layer 22 is 7.5 nm to 25 nm.

[0067] In one embodiment, the outermost low refractive index layer 23 is in direct contact with the absorption functional layer 22 furthest from the substrate 10, that is, the outermost low refractive index layer 23 is in direct contact with the outermost absorption functional layer 22, and the number of dielectric layers 21 is equal to the number of absorption functional layers 22.

[0068] In other implementations of reflection, a dielectric layer 21 is provided between the outermost low-refractive-index layer 23 and the absorption functional layer 22 furthest from the substrate 10. This outermost dielectric layer 21, also referred to as the outermost dielectric layer 21, has a physical thickness of 5 nm to 50 nm. The intermediate dielectric layer 21 is used to protect the absorption functional layer 22 and to adjust the mechanical properties, optical properties, and appearance color of the low-transmittance heat-insulating layer 20. Preferably, the physical thickness of the dielectric layer 21 furthest from the substrate 10 is 8 nm to 40 nm; more preferably, the physical thickness of the dielectric layer 21 closest to the substrate 10 is 10 nm to 35 nm.

[0069] In order to better achieve the comprehensive requirements of vehicle window glass in terms of optical performance, mechanical performance and appearance color of the low-transparency heat insulation layer 20, the dielectric layer 21 can be a single-layer structure or a multi-layer structure, for example, including at least two dielectric sub-layers, and the difference in refractive index between two adjacent dielectric sub-layers can be greater than or equal to 0.1.

[0070] The physical thickness of the outermost low-refractive-index layer 23 is greater than the physical thickness of the dielectric layer 21. Specifically, the ratio of the physical thickness of the outermost low-refractive-index layer 23 to the physical thickness of the dielectric layer 21 is 1.2 to 5, and examples include 1.2, 1.4, 1.6, 1.8, 2, 2.2, 2.4, 2.6, 2.8, 3, 3.5, 4, 4.5, or 5. More preferably, the ratio of the physical thickness of the outermost low-refractive-index layer 23 to the physical thickness of the dielectric layer 21 is 1.5 to 4.5. Even more preferably, the ratio of the physical thickness of the outermost low-refractive-index layer 23 to the physical thickness of the dielectric layer 21 is 2 to 4.

[0071] In some embodiments, the coated glass 1 has a medium emissivity, that is, the emissivity e of the coated glass measured from the side of the low-transparency heat insulation layer 20 is 0.36 ≤ e < 0.5. The emissivity of the coated glass without the low-transparency heat insulation layer 20 is around 0.9. The coated glass 1 with medium emissivity can achieve the effect of heat insulation in summer and heat preservation in winter. The emissivity e of the coated glass 1 is less than 0.5, and specific examples can be 0.5, 0.48, 0.47, 0.46, 0.45, 0.44, 0.43, 0.42, 0.41, 0.40, 0.39, 0.38, 0.37, or 0.36, etc.; preferably, the emissivity e of the coated glass 1 is 0.40 ≤ e ≤ 0.48. The coated glass 1 provided in this application has a moderate emissivity e, which can effectively block the heat exchange between the inside and outside of the vehicle, achieving the effect of heat insulation in summer and heat preservation in winter without the need for a sunshade in the vehicle.

[0072] In other embodiments, the coated glass 1 has a low emissivity, specifically, the emissivity e of the coated glass measured from the side of the low-transmittance heat insulation layer 20 is 0.10 ≤ e ≤ 0.35. The emissivity of the coated glass without the low-transmittance heat insulation layer 20 is around 0.9. The coated glass 1 with low emissivity can achieve the effect of heat insulation in summer and heat preservation in winter. The emissivity e of the coated glass 1 is 0.10 ≤ e ≤ 0.35, and can be specifically exemplified as 0.35, 0.34, 0.33, 0.32, 0.31, 0.30, 0.29, 0.28, 0.27, 0.26, 0.25, 0.20, 0.18, or 0.15, etc.; preferably, the emissivity e of the coated glass 1 is 0.2 ≤ e ≤ 0.3. The coated glass 1 provided in this application has a low emissivity e, which can effectively block the heat exchange between the inside and outside of the vehicle, achieving the effect of heat insulation in summer and heat preservation in winter without the need for a sunshade in the vehicle.

[0073] In this application, the coated glass 1 has a medium or low emissivity. The low-transmittance heat insulation layer 20 enables the emissivity e of the coated glass 1 measured from the side of the low-transmittance heat insulation layer 20 to be ≤0.5. The low-transmittance heat insulation layer 20 includes at least one absorption functional layer 22, which can reduce the emissivity e of the coated glass 1, thereby replacing the transparent conductive oxide (TCO) layer in the related art. That is, the low-transmittance heat insulation layer 20 does not include the transparent conductive oxide layer. The material of the transparent conductive oxide layer is ITO (indium tin oxide), FTO (fluorine-doped tin oxide), YZO (yttrium-doped zinc oxide), HAZO (hafnium and aluminum-doped zinc oxide), WAZO (tungsten and aluminum-doped zinc oxide), or GZO (gallium-doped zinc oxide). This application utilizes an absorption functional layer 22 to replace the transparent conductive oxide layer in related technologies, which can achieve the effect of reducing visible light transmittance without the need to add additional visible light absorbing materials. Furthermore, compared with the magnetron sputtering efficiency of transparent conductive oxide, the absorption functional layer 22 used in this application can further improve the magnetron sputtering efficiency, thereby improving the production efficiency of the low-transmittance heat insulation layer 20.

[0074] The visible light transmittance TL of the coated glass 1 is ≤15%, specifically, it can be 15%, 14%, 13%, 12%, 11%, 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, or 1%, etc. Preferably, the visible light transmittance TL of the coated glass 1 is ≤10%, more preferably, the visible light transmittance TL of the coated glass 1 is ≤8%. Further, the visible light transmittance TL of the coated glass 1 is ≤5%. Even further, the visible light transmittance TL of the coated glass 1 is ≤2%. The coated glass 1 provided in this application has a low visible light transmittance TL, thereby preventing occupants of the vehicle from being glared by sunlight, and has the effect of protecting privacy and preventing glare.

[0075] This application also provides a vehicle window glass 2, which includes a first glass plate 11, an adhesive layer 12, and a coated glass 1 as described above. The first glass plate 11 has a first surface 111 and a second surface 112. The substrate 10 has a third surface 131 and a fourth surface 132. The adhesive layer 12 connects the second surface 112 and the third surface 131. The thickness of the substrate 10 is 0.7 mm to 3.5 mm. The low-transmittance heat insulation layer 20 is disposed on the fourth surface 132.

[0076] Specifically, such as Figure 4As shown, the first glass plate 11 serves as the outer glass plate of the vehicle window glass 2. The first glass plate 11 has a first surface 111 and a second surface 112. The first surface 111 is away from the adhesive layer 12 and in contact with the external environment of the vehicle, while the second surface 112 is close to the adhesive layer 12. The substrate 10 serves as the inner glass plate of the vehicle window glass 2. The substrate 10 has a third surface 131 and a fourth surface 132. The third surface 131 is close to the adhesive layer 12, while the fourth surface 132 is away from the adhesive layer 12 and close to the internal environment of the vehicle. The adhesive layer 12 connects the second surface 112 and the third surface 131, and the low-transmittance heat insulation layer 20 is disposed on the fourth surface 132.

[0077] The first glass plate 11 has a thickness of 0.7mm to 4.0mm and a visible light transmittance of ≥70%, ≥80%, or ≥90%. The first glass plate 11 is transparent glass or ultra-transparent glass (ultra-clear glass). The total iron content (calculated as Fe2O3) of the transparent glass (standard clear glass) is less than or equal to 0.1%, even less than or equal to 0.05%, and the visible light transmittance of the transparent glass is 80% to 95%. The total iron content (calculated as Fe2O3) of the ultra-transparent glass (ultra-clear glass) is less than or equal to 0.015%, even less than or equal to 0.01%, and even less than or equal to 50 PPM, and the visible light transmittance of the ultra-transparent glass is 90% to 95%. For example, the outer glass plate can be 2.1mm thick transparent glass with a visible light transmittance of 89%. The thickness of the outer glass plate is preferably 1.6mm to 3.5mm. The application uses transparent or ultra-transparent glass as the first glass plate 11, which helps to reduce the cost of the window glass 2 and reduces the absorption of infrared rays when used in conjunction with the infrared reflective layer. This maximizes the function of the infrared reflective layer in reflecting infrared rays and improves the heat insulation performance of the window glass 2.

[0078] The adhesive layer 12 can be a transparent thermoplastic polymer film or a light-colored thermoplastic polymer film, and the thickness of the adhesive layer 12 is 0.38 mm to 2.28 mm. For example, the thickness of the adhesive layer 12 can be, but is not limited to, 0.38 mm, 0.76 mm, 1.14 mm, 1.52 mm, 1.9 mm, 2.28 mm, or other values ​​between 0.38 mm and 2.28 mm. The material of the thermoplastic polymer film can be selected from at least one of polyvinyl butyral (PVB), polyurethane (PU), ethylene-vinyl acetate copolymer (EVA), and ionic polymer (SGP).

[0079] Optionally, the visible light transmittance of the adhesive layer 12 is ≥70%, ≥80%, or ≥85%. When the adhesive layer 12 is a transparent thermoplastic polymer, the visible light transmittance of the transparent thermoplastic polymer is greater than or equal to 85%. For example, the visible light transmittance of the adhesive layer 12 can be, but is not limited to, 85%, 90%, or 95%.

[0080] In related technologies, the adhesive layer 12 is selected from a dark-colored thermoplastic polymer film with a visible light transmittance ≤44%, such as gray PVB with a visible light transmittance of 28%, 12%, 8%, 5%, or 2%. Alternatively, this application may use a light-colored thermoplastic polymer film with a visible light transmittance ≥70% or ≥80%. When the adhesive layer 12 is a light-colored thermoplastic polymer film, the visible light transmittance of the light-colored thermoplastic polymer film is greater than or equal to 70%. For example, the visible light transmittance of the adhesive layer 12 may be, but is not limited to, 70%, 75%, 80%, 85%, or 90%. The light-colored thermoplastic polymer film may be a light gray, light green, or light blue thermoplastic polymer film.

[0081] Optionally, the adhesive layer 12 can be a single-layer or multi-layer structure. Examples of multi-layer structures include double-layer, triple-layer, quadruple-layer, and five-layer structures. The adhesive layer 12 can also have other functions, such as adding infrared absorbers to provide sun protection or heat insulation, adding ultraviolet absorbers to provide ultraviolet protection, or having at least one layer of the multi-layer structure with a higher plasticizer content to provide sound insulation.

[0082] The substrate 10 has a thickness of 0.7 mm to 3.5 mm and a visible light transmittance of ≥70%, ≥80%, ≥85%, or ≥90%. The substrate 10 is transparent glass, ultra-transparent glass, or light-colored glass. The total iron content (as Fe2O3) of the transparent glass (standard clear glass) is less than or equal to 0.1%, even less than or equal to 0.05%, and the visible light transmittance of the transparent glass is 80% to 95%. The total iron content (as Fe2O3) of the ultra-transparent glass (ultra-clear glass) is less than or equal to 0.015%, even less than or equal to 0.01%, and even less than or equal to 50 PPM, and the visible light transmittance of the ultra-transparent glass is 90% to 95%.

[0083] Optionally, the substrate 10 is made of dark-colored glass with a visible light transmittance of ≤60%, such as dark green glass with a visible light transmittance of 42%, dark gray glass with a visible light transmittance of 18%, or dark gray glass with a visible light transmittance of 10%.

[0084] Preferably, the substrate 10 can also be light-colored glass with a visible light transmittance of ≥70%, ≥80%, or ≥85%. For example, the substrate 10 can be 2.1 mm thick transparent glass with a visible light transmittance of 89%, or 1.6 mm thick green glass with a visible light transmittance of 83%, or 2.1 mm thick green glass with a visible light transmittance of 80%. Using transparent glass, ultra-transparent glass, or light-colored glass as the substrate 10 in this application helps reduce the cost of the vehicle window glass 2 and maximizes the function of the low-transmittance heat insulation layer 20 when used in conjunction with it. Compared with dark-colored glass, it also reduces the difficulty of glass forming processes and improves the quality of glass forming.

[0085] Optionally, a dimming film is provided between the first glass plate 11 and the substrate 10. The dimming film can be a polymer-dispersed liquid crystal film (PDLC), a suspended particle film (SPD), an electrochromic film (EC), a dye liquid crystal film (LC), etc. The minimum visible light transmittance of the dimming film is less than or equal to 3%, for example, 3%, 2%, 1%, 0.5%, or 0%. Furthermore, the maximum visible light transmittance of the dimming film can be set as needed, for example, 10%, 20%, 30%, 50%, 70%, or 80%. Specifically, for example, the visible light transmittance of the dimming film can be adjusted between 0% and 20%, between 0.5% and 50%, or between 1% and 70%, etc. The dimming film can meet the visible light transmittance requirements in multiple scenarios. For example, when black border display is required, the dimming film is in an opaque state (visible light transmittance is less than or equal to 3%, or even 0%), which improves the contrast between the displayed image and the displayed background. When no display is required, the dimming film is in a transparent state (visible light transmittance is greater than or equal to 70%), which enables a larger area of ​​the car window glass 2 to be transparent. The dimming film is set in the adhesive layer 12. For example, the adhesive layer 12 can be two thermoplastic polymer films, with the dimming film sandwiched between the two thermoplastic polymer films.

[0086] This application also provides a vehicle window glass, which is simply the coated glass provided above, wherein the thickness of the substrate 10 is 2.5mm to 8mm. It is understood that the coated glass can be formed into tempered glass through automotive glass manufacturing processes and can be used alone as vehicle window glass, such as as a side window, sunroof, or rear windshield.

[0087] The thickness of the substrate 10 can be, for example, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, or 8mm.

[0088] The vehicle window glass provided in this application, by incorporating a low-transmittance heat-insulating layer, achieves a lower visible light transmittance (TL) and a lower emissivity (e) in the coated glass. This allows it to replace dark PVB films or dark-tinted glass in related technologies, resulting in coated glass that is low-cost, simple to manufacture, and provides privacy protection. Furthermore, the coated glass can be used alone as vehicle window glass or manufactured as a whole. It effectively blocks heat, eliminating the need for interior sunshades and thus providing greater interior height and improved user experience.

[0089] To make the objectives and advantages of this application clearer, the effects of the coated glass of this application will be further explained in detail below with reference to specific embodiments.

[0090] Comparative Examples 1-5 and Examples 1-12

[0091] Comparative Example 1 and Examples 1-3: A 2.1 mm thick transparent glass was used as substrate 10, and the visible light transmittance of substrate 10 was 88%. According to the magnetron sputtering process and automotive glass manufacturing process, a low-transmittance heat insulation layer 20 was deposited on substrate 10 of Examples 1-3, and an ITO low-emissivity layer was deposited on substrate 10 of Comparative Example 1.

[0092] The structural parameters of the coated glass of Comparative Example 1 and Examples 1-3 are shown in Table 1.

[0093] Table 1: Structural parameters of the coated glass in Comparative Example 1 and Examples 1-3

[0094]

[0095] Comparative Examples 2-5: A 2.1 mm thick transparent glass substrate 10 was used as the substrate 10, with a visible light transmittance of 88%. A low-transmittance heat-insulating layer 20 was deposited on the substrate 10 of Comparative Examples 2-5 according to the magnetron sputtering process and automotive glass manufacturing process.

[0096] The structural parameters of the coated glass in Comparative Examples 2-5 are shown in Table 2.

[0097] Table 2: Structural parameters of the coated glass in Comparative Examples 2-5

[0098]

[0099]

[0100] Examples 4-6: A 2.1 mm thick green glass was used as substrate 10, with a visible light transmittance of 83%. A low-transmittance heat-insulating layer 20 was deposited on substrate 10 of Examples 4-6 according to magnetron sputtering and automotive glass manufacturing processes.

[0101] The structural parameters of the coated glass in Examples 4-6 are shown in Table 3.

[0102] Table 3: Structural parameters of the coated glass in Examples 4-6

[0103]

[0104] Examples 7-9: A 2.1 mm thick transparent glass substrate 10 is used as the substrate 10, and the visible light transmittance of the substrate 10 is 88%. A low-transmittance heat-insulating layer 20 is deposited on the substrate 10 of Examples 7-9 according to the magnetron sputtering process and the automotive glass manufacturing process.

[0105] The structural parameters of the coated glass in Examples 7-9 are shown in Table 4.

[0106] Table 4: Structural parameters of the coated glass in Examples 7-9

[0107]

[0108] Examples 10-12: A 2.1 mm thick transparent glass substrate 10 is used as the substrate 10, and the visible light transmittance of the substrate 10 is 88%. According to the magnetron sputtering process and the automotive glass manufacturing process, a low-transmittance heat insulation layer 20 is deposited on the substrate 10 of Examples 10-12.

[0109] The structural parameters of the coated glass in Examples 10-12 are shown in Table 5.

[0110] Table 5: Structural parameters of the coated glass in Examples 10-12

[0111]

[0112]

[0113] Prepare coated glass from Comparative Examples 1-5 and Examples 1-12, measure and calculate visible light transmittance, visible light reflectance, and emissivity, and record the measurement results in Table 6.

[0114] Emissivity e: The emissivity of the coated glass is measured and calculated using an emissivity meter from the side of the low-transmittance insulation layer.

[0115] Visible light transmittance (TL): The visible light transmittance of coated glass is measured and calculated according to standard ISO 9050.

[0116] Visible light reflectance RL: The visible light transmittance of coated glass, measured from the low-transmittance insulation side, according to standard ISO 9050.

[0117] Table 6: Performance parameters of the coated glass in Comparative Examples 1-5 and Examples 1-12

[0118] Total physical thickness of functional layers emissivity e Visible light transmittance TL Visible light reflectance RL Comparative Example 1 113.7nm 0.20 63.28％ 5.87％ Comparative Example 2 23.8nm 0.45 7.19％ 19.10％ Comparative Example 3 10.5nm 0.67 37.66％ 4.26％ Comparative Example 4 61.7nm 0.14 0.26％ 0.24％ Comparative Example 5 47.9nm 0.16 0.75％ 14.94％ Example 1 23.8nm 0.45 8.68％ 2.26％ Example 2 25.8nm 0.41 7.38％ 1.87％ Example 3 25.5nm 0.42 7.33％ 2.59％ Example 4 25.0nm 0.42 5.12％ 0.48％ Example 5 24.3nm 0.44 5.55％ 0.20％ Example 6 22.9nm 0.46 8.28％ 1.42％ Example 7 33.0nm 0.29 3.77％ 1.76％ Example 8 32.6nm 0.30 2.76％ 1.89％ Example 9 30.9nm 0.32 2.98％ 1.84％ Example 10 36.9nm 0.22 1.89％ 1.89％ Example 11 36.3nm 0.23 1.85％ 1.70％ Example 12 36.3nm 0.23 1.88％ 0.28％

[0119] Comparative Example 1 uses an ITO low-emissivity layer from related technologies. The total physical thickness of the ITO functional layer is greater than 100 nm. The visible light transmittance of the coated glass is ≥60% and the visible light reflectance is >5%. In order to make the visible light transmittance of the final car window glass ≤15% and the visible light reflectance ≤5%, expensive dark-colored thermoplastic polymer films, such as dark gray PVB, are usually selected, or dark-colored glass is selected as a sheet to be made into laminated glass.

[0120] Comparative Examples 2-5 all have a low-transmittance heat insulation layer on the substrate. However, the physical thickness of the outermost low refractive index layer in Comparative Example 2 is too small, and the physical thickness of the outermost low refractive index layer does not meet the requirement of ≥20nm. This results in the visible light reflectivity of the coated glass being greater than 15%. When the coated glass is made into car window glass, it will cause severe reflections inside the car.

[0121] In Comparative Example 3, the low refractive index layer consists of only one absorption functional layer. The emissivity e of the coated glass is greater than 0.6, which cannot achieve a low radiation effect. Furthermore, the visible light transmittance of the coated glass is relatively high, making it unsuitable as a good replacement for dark PVB films or dark-colored glass in related technologies.

[0122] In Comparative Example 4, the physical thickness of the absorption functional layer closest to the substrate surface is too large, exceeding 40 nm. This results in a visible light reflectance of more than 25% on the outer side of the car window after the coated glass is formed, causing severe light pollution outside the vehicle and low environmental friendliness to pedestrians or other vehicles.

[0123] In Comparative Example 5, the physical thickness of the absorption functional layer furthest from the substrate surface is too large, exceeding 20 nm. This results in a visible light reflectivity greater than 14% on the inner side of the car window after the coated glass is formed, leading to severe reflections inside the car.

[0124] However, in Examples 1-12, by setting a low-transmittance heat-insulating layer on the substrate and controlling the number, physical thickness, and physical thickness ratio between layers of the dielectric layer, absorption functional layer, and outermost low-refractive-index layer, the emissivity e of the coated glass satisfies e < 0.5, the visible light transmittance TL of the coated glass satisfies TL ≤ 15%, and the visible light reflectance of the coated glass is ≤ 5%. Specifically, the emissivity e of the coated glass satisfies 0.36 ≤ e < 0.5, or 0.10 ≤ e ≤ 0.35. The visible light transmittance TL of the coated glass satisfies TL ≤ 10%, or TL ≤ 8%, or TL ≤ 5%, or TL ≤ 2%. The visible light reflectance RL of the coated glass satisfies RL ≤ 3%, or RL ≤ 2%, or RL ≤ 1%, or RL ≤ 0.5%.

[0125] In summary, the coated glass and window glass provided in this application have low visible light transmittance TL and low emissivity e, which eliminates the need for dark PVB film in related technologies, thus achieving the effects of low cost, simple manufacturing, and privacy protection. In addition, it can also block heat, eliminating the need for sunshades in the vehicle, thereby obtaining a larger interior height space and improving the user experience.

[0126] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0127] In this application, the terms "embodiment" and "implementation" mean that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of these phrases in various locations throughout the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art will understand, explicitly and implicitly, that the embodiments described in this application can be combined with other embodiments. Furthermore, it should be understood that the features, structures, or characteristics described in the various embodiments of this application can be arbitrarily combined to form another embodiment that does not depart from the spirit and scope of the technical solution of this application, provided there is no contradiction between them.

[0128] The above description represents some embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. A coated glass, characterized in that, The coated glass comprises a substrate and a low-transmittance thermal insulation layer disposed on at least one surface of the substrate, the low-transmittance thermal insulation layer comprising at least two dielectric layers and at least two absorption functional layers stacked, each of the absorption functional layers being located between two adjacent dielectric layers; The material of the absorption functional layer is selected from at least one element of Si, Ni, Cr, Al, Ti, Nb, Mo, Sn, Zn, Zr, Mg in the form of a single element or an alloy or an oxide or a nitride or an oxynitride; The physical thickness of the absorption functional layer closest to the substrate is 5-35 nm; The physical thickness of the absorption functional layer farthest from the substrate is less than that of the absorption functional layer closest to the substrate; the physical thickness of the absorption functional layer farthest from the substrate is 1-16 nm; The visible light transmittance of the coated glass is less than or equal to 15%.

2. The coated glass of claim 1, wherein, The low-transmittance thermal insulation layer further comprises an outermost low-refractive-index layer, the outermost low-refractive-index layer being disposed farthest from the substrate, the refractive index of the outermost low-refractive-index layer being less than or equal to 1.

7.

3. The coated glass of claim 1, wherein, The low-transmittance thermal insulation layer does not comprise a transparent conductive oxide layer, the material of the transparent conductive oxide layer being ITO, FTO, YZO, HAZO, WAZO or GZO.

4. The coated glass of claim 1, wherein, The material of the dielectric layer is selected from at least one element of Zn, Sn, Ti, Si, Al, Ni, Cr, Nb, Mg, Zr, Ga, Y, In, Sb, V, Ta in the form of a nitride or an oxide or an oxynitride.

5. The coated glass of claim 4, wherein, The refractive index of the dielectric layer is greater than or equal to 1.

8.

6. The coated glass of claim 4, wherein, The refractive index of the dielectric layer is greater than or equal to 2.

0.

7. The coated glass of claim 4, wherein, The refractive index of the dielectric layer is greater than or equal to 2.

2.

8. The coated glass of claim 1, wherein, The physical thickness of the low-transmittance thermal insulation layer is 150-500 nm.

9. The coated glass of claim 1, wherein, The physical thickness of the low-transmittance thermal insulation layer is 200-400 nm.

10. The coated glass of claim 1, wherein, The physical thickness of the low-transmittance thermal insulation layer is 220-300 nm.

11. The coated glass of claim 1, wherein, The total physical thickness of the absorption functional layers is 15-100 nm.

12. The coated glass of claim 1, wherein, The total physical thickness of the absorption functional layers is 18-80 nm.

13. The coated glass of claim 1, wherein, The total physical thickness of the absorption functional layers is 20-60 nm.

14. The coated glass of claim 2, wherein, The physical thickness of the outermost low-refractive-index layer is ≥20 nm.

15. The coated glass of claim 2, wherein, The physical thickness of the outermost low-refractive-index layer is ≥40 nm.

16. The coated glass of claim 2, wherein, The physical thickness of the outermost low-refractive-index layer is ≥60 nm.

17. The coated glass of claim 1, wherein, The physical thickness of the dielectric layer closest to the substrate in the low-transmittance thermal insulation layer is 20-100 nm.

18. The coated glass of claim 1, wherein, The physical thickness of the dielectric layer closest to the substrate in the low-transmittance thermal insulation layer is 25-90 nm.

19. The coated glass of claim 1, wherein, The physical thickness of the dielectric layer closest to the substrate in the low-transmittance thermal insulation layer is 30-80 nm.

20. The coated glass of claim 1, wherein, The physical thickness of the dielectric layer between two adjacent absorption functional layers in the low-transmittance thermal insulation layer is 20-100 nm.

21. The coated glass of claim 1, wherein, The physical thickness of the dielectric layer between two adjacent absorption functional layers in the low-transmittance thermal insulation layer is 30-80 nm.

22. The coated glass of claim 1, wherein, The physical thickness of the dielectric layer between two adjacent absorption functional layers in the low-transmittance thermal insulation layer is 35-75 nm.

23. The coated glass of claim 1, wherein, The physical thickness of the absorption functional layer closest to the substrate is 8-30 nm.

24. The coated glass of claim 1, wherein, The physical thickness of the absorption functional layer closest to the substrate is 10-25 nm.

25. The coated glass of claim 1, wherein, The physical thickness of the absorption functional layer farthest from the substrate is 2-12 nm.

26. The coated glass of claim 1, wherein, The physical thickness of the absorption functional layer farthest from the substrate is 3-8 nm.

27. The coated glass of claim 1, wherein, The ratio of the physical thickness of the absorption functional layer farthest from the substrate to the physical thickness of the absorption functional layer closest to the substrate is 0.3-0.

9.

28. The coated glass of claim 1, wherein, The ratio of the physical thickness of the absorption functional layer farthest from the substrate to the physical thickness of the absorption functional layer closest to the substrate is 0.35-0.

85.

29. The coated glass of claim 1, wherein, The low-transmittance heat-insulating layer comprises at least three absorption functional layers, and the physical thickness of the absorption functional layer between two adjacent absorption functional layers is 5-30 nm.

30. The coated glass of claim 29, wherein, The physical thickness of the absorption functional layer between two adjacent absorption functional layers is 7.5-25 nm.

31. The coated glass of claim 2, wherein, The outermost low-refractive-index layer is in direct contact with the absorption functional layer farthest from the substrate.

32. The coated glass of claim 2, wherein, The outermost low-refractive-index layer is in direct contact with the absorption functional layer farthest from the substrate.

33. The coated glass of claim 32, wherein, The physical thickness of the medium layer is 8-40 nm.

34. The coated glass of claim 32, wherein, The physical thickness of the medium layer is 10-35 nm.

35. The coated glass of claim 32, wherein the coating has a visible light transmittance of at least 70%. The physical thickness of the outermost low-refractive-index layer is greater than the physical thickness of the medium layer.

36. The coated glass of claim 32, wherein, The ratio of the physical thickness of the outermost low-refractive-index layer to the physical thickness of the medium layer is 1.2-5.

37. The coated glass of claim 32, wherein, The ratio of the physical thickness of the outermost low-refractive-index layer to the physical thickness of the medium layer is 1.5-4.

5.

38. The coated glass of claim 32, wherein, The ratio of the physical thickness of the outermost low-refractive-index layer to the physical thickness of the medium layer is 2-4.

39. The coated glass of claim 1, wherein, The material of the substrate is soda-lime glass, or high-alumina glass, or lithium-alumina glass, or borosilicate glass, or polyethylene terephthalate, or polycarbonate.

40. The coated glass of claim 1, wherein, The substrate is transparent glass, and the visible light transmittance of the transparent glass is greater than or equal to 80%.

41. The coated glass of claim 1, wherein, The substrate is super-transparent glass, and the visible light transmittance of the super-transparent glass is greater than or equal to 90%.

42. The coated glass of claim 1, wherein, The substrate is light-tinted glass, and the visible light transmittance of the light-tinted glass is greater than or equal to 70%.

43. The coated glass of claim 1, wherein, The emissivity e of the coated glass measured from the low-transmittance heat-insulating layer side is 0.36≤e<0.

5.

44. The coated glass of claim 1, wherein, The emissivity e of the coated glass measured from the low-transmittance heat-insulating layer side is 0.40≤e≤0.

48.

45. The coated glass of claim 1, wherein, The emissivity e of the coated glass measured from the low-transmittance heat-insulating layer side is 0.10≤e≤0.

35.

46. The coated glass of claim 1, wherein, The emissivity e of the coated glass measured from the low-transmittance heat-insulating layer side is 0.2≤e≤0.

3.

47. The coated glass of claim 1, wherein, The visible light transmittance TL of the coated glass is ≤10%.

48. The coated glass of claim 1, wherein, The visible light transmittance TL of the coated glass is ≤8%.

49. The coated glass of claim 1, wherein, The visible light transmittance TL of the coated glass is ≤5%.

50. The coated glass of claim 1, wherein, The visible light transmittance TL of the coated glass is ≤2%.

51. The coated glass of claim 1, wherein, The visible light reflectance RL of the coated glass is ≤5%.

52. The coated glass of claim 1, wherein, The visible light reflectance RL of the coated glass is ≤3%.

53. The coated glass of claim 1, wherein, The visible light reflectance RL of the coated glass is ≤2%.

54. The coated glass of claim 1, wherein, The visible light reflectance RL of the coated glass is ≤1%.

55. A vehicle glazing, characterised by The vehicle window glass comprises a first glass plate, a bonding layer, and the coated glass as claimed in any one of claims 1-54, the first glass plate has a first surface and a second surface, the substrate has a third surface and a fourth surface, the bonding layer connects the second surface and the third surface, the thickness of the substrate is 0.7-3.5 mm, and the low-transmittance heat-insulation layer is arranged on the fourth surface.

56. A vehicle glazing, characterised by The vehicle window glass is only the coated glass as claimed in any one of claims 1-54, and the thickness of the substrate is 2.5-8 mm.

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