Coated glass and vehicle window glass

Abstract

The invention provides coated glass and vehicle window glass. The coated glass comprises a substrate and a low-permeability heat insulation layer arranged on at least one surface of the substrate, the low-permeability heat insulation layer comprises at least two dielectric layers and at least two absorption function layers which are arranged in a stacked mode, and each absorption function layer is located between the two adjacent dielectric layers; the visible light transmittance of the coated glass is less than or equal to 15%. By arranging the low-transmittance heat insulation layer, the coated glass has lower visible light transmittance TL and lower radiance e, and can replace a dark PVB (Polyvinyl Butyral) membrane in related technologies, so that the coated glass has the effects of low cost, simplicity in manufacturing and production and privacy protection. Moreover, the coated glass can be independently used as the vehicle window glass and can also be made into the vehicle window glass, heat can be blocked, a sunshade curtain in a vehicle is omitted, and therefore a larger height space in the vehicle is obtained, and the use experience of a user is improved.

Description

Technical Field

[0001] The present application belongs to the field of glass technology, and specifically relates to coated glass and vehicle window glass. Background Art

[0002] As the market demand for new energy vehicles grows, people are gradually increasing their requirements for car window glass in order to better demonstrate intelligence and functionality in the automotive field. In vehicles, in order to meet the privacy and shading requirements of car window glass, dark PVB films and / or dark tinted glass are often used to absorb visible light to reduce transmittance. However, the cost of PVB films is relatively high, resulting in higher vehicle costs.

[0003] In addition, since the chassis of new energy vehicles is equipped with power battery components, the height space inside the vehicle is reduced, so the sunshade is omitted in the relevant technology to obtain a larger interior height space. However, this allows the sun's heat outside the vehicle to enter the vehicle through the window glass, greatly reducing the riding comfort and the user experience. Summary of the invention

[0004] In view of this, the first aspect of the present application provides a coated glass, the coated glass comprising a substrate and a low-transmittance heat-insulating layer arranged on at least one surface of the substrate, the low-transmittance heat-insulating 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;

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

[0006] Wherein, the low-transmittance heat-insulating layer further includes an outermost low-refractive-index layer, the outermost low-refractive-index layer is arranged farthest from the substrate, and the refractive index of the outermost low-refractive-index layer is less than or equal to 1.7.

[0007] Among them, the low-transmittance thermal insulation layer does not include a transparent conductive oxide layer, and 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] Among them, the material of the dielectric layer is selected from the nitride, oxide, or oxynitride of at least one element among Zn, Sn, Ti, Si, Al, Ni, Cr, Nb, Mg, Zr, Ga, Y, In, Sb, V, 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] Among them, the material of the absorption functional layer is selected from a single substance or alloy or oxide, nitride or nitrogen oxide of at least one element among Si, Ni, Cr, Al, Ti, Nb, Mo, Sn, Zn, Zr, and Mg.

[0011] Wherein, the physical thickness of the low-transmittance heat-insulating layer is 150nm-500nm, or 200nm-400nm, or 220nm-300nm.

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

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

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

[0015] Wherein, the physical thickness of the dielectric layer located between two adjacent absorption functional layers in the low-transmittance heat-insulating 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 5 nm to 35 nm, or 8 nm to 30 nm, or 10 nm to 25 nm.

[0017] Wherein, the physical thickness of the absorption functional layer farthest from the substrate is smaller than the physical thickness of the absorption functional layer closest to the substrate;

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

[0019] 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 to 0.9, or 0.35 to 0.85.

[0020] Wherein, the low-transmittance heat-insulating layer comprises 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] Wherein, the outermost low refractive index layer is in direct contact with the absorption functional layer farthest from the substrate.

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

[0023] 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 1.2-5, or 1.5-4.5, or 2-4.

[0024] Wherein, the material of the substrate is soda-lime glass, or high-aluminum glass, or lithium-aluminum glass, or borosilicate glass, or polyethylene terephthalate, or polycarbonate.

[0025] Wherein, the substrate is transparent glass, extra-transparent glass or lightly tinted glass, the visible light transmittance of the transparent glass is greater than or equal to 80%, the visible light transmittance of the extra-transparent glass is greater than or equal to 90%, and the visible light transmittance of the lightly tinted glass is greater than or equal to 70%.

[0026] The emissivity e of the coated glass measured from the side of the low-transmittance heat-insulating 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-insulating 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 reflectivity RL of the coated glass is ≤5%, or ≤3%, or ≤2%, or ≤1%.

[0030] The second aspect of the present application provides a vehicle window glass, which includes a first glass plate, an adhesive layer, and the coated glass provided in the first aspect of the present application, wherein the first glass plate has a first surface and a second surface, the substrate has a third surface and a fourth surface, the adhesive layer connects the second surface and the third surface, the thickness of the substrate is 0.7 mm to 3.5 mm, and the low-transmittance thermal insulation layer is arranged on the fourth surface.

[0031] A third aspect of the present application provides a vehicle window glass, which is merely the coated glass provided in the first aspect of the present application, and the thickness of the substrate is 2.5 mm to 8 mm.

[0032] The coated glass and window glass provided by the present application, by setting a low-transmittance heat-insulating layer, make the coated glass have a lower visible light transmittance TL and a lower emissivity e, and can replace the dark PVB film in the related art, so that the coated glass has the effects of low cost, simple manufacturing and production, and privacy protection. In addition, the coated glass can be used alone as window glass, or it can be made into window glass as window glass, which can block heat and omit the setting of sunshades in the vehicle, thereby obtaining a larger height space inside the vehicle and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the implementation modes of the present application, the drawings required for use in the implementation modes of the present application will be described below.

[0034] Figure 1 A schematic diagram of the structure of coated glass provided in one embodiment of the present application.

[0035] Figure 2 A schematic structural diagram of coated glass provided in another embodiment of the present application.

[0036] Figure 3 A schematic structural diagram of coated glass provided in yet another embodiment of the present application.

[0037] Figure 4 A schematic structural diagram of a vehicle window glass provided in one embodiment of the present application.

[0038] Explanation of reference numerals: coated glass 1, substrate 10, low-transmittance heat-insulating layer 20, dielectric layer 21, absorption functional layer 22, low-refractive index layer 23, vehicle window glass 2, first glass plate 11, first surface 111, second surface 112, adhesive layer 12, third surface 131, fourth surface 132. DETAILED DESCRIPTION

[0039] The following are preferred implementations of the present application. It should be noted that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application, and these improvements and modifications are also considered to be within the scope of protection of the present application.

[0040] Unless otherwise specified or there is a contradiction, the terms and phrases used in this application have the following meanings:

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

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

[0043] The value of x in the chemical formula: if it is clearly defined, it shall be within the defined range. If it is not clearly defined, it can be determined based on the deposition in a stoichiometric, substoichiometric or superstoichiometric manner 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 Figure 1-Figure 3 The present application provides a coated glass 1, which includes a substrate 10 and a low-transmittance heat-insulating layer 20 arranged on at least one surface of the substrate 10, the low-transmittance heat-insulating layer 20 includes at least two dielectric layers 21 and at least two absorption functional layers 22 stacked, and each of the absorption functional layers 22 is 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-insulating layer 20 further includes an outermost low-refractive-index layer 23 , which is disposed farthest from the substrate 10 , and has a refractive index less than or equal to 1.7.

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

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

[0049] like Figure 1As shown, the low-transmittance heat-insulating layer 20 may be composed of two dielectric layers 21, two absorption functional layers 22, and an outermost low-refractive index layer 23; for example, 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-insulating layer 20 may also be composed of three dielectric layers 21, two absorption functional layers 22, and an outermost low-refractive index layer 23, for example, 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-insulating layer 20 may also be composed of three dielectric layers 21, three absorption functional layers 22 and an outermost low-refractive index layer 23; for example, it may 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-insulating layer 20 may also be composed of four dielectric layers 21, three absorption functional layers 22 and an outermost low-refractive index layer 23; for example, it may 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-insulating layer 20 may also be composed of four dielectric layers 21, four absorption functional layers 22 and an outermost low-refractive index layer 23; for example, it may 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-insulating layer 20 may also be composed of five dielectric layers 21, four absorption functional layers 22 and an outermost low-refractive index layer 23; for example, it may 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-transmittance heat-insulating 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 is used to protect the absorption functional layer 22, and to adjust the mechanical properties, chemical resistance, high temperature heat treatment resistance, optical properties, appearance color, etc. of the low-transmittance heat insulation layer 20. The material of the dielectric layer 21 is selected from the nitride, oxide, or oxynitride of at least one element 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, NbOx, etc. In some embodiments, the refractive index of the dielectric layer 21 is ≥1.8, and specific examples include 1.8, or 1.9, or 2.0, or 2.1, or 2.2, or 2.3, or 2.4, or 2.5, or 2.6, or 2.7, etc. Preferably, the refractive index of the dielectric layer 21 is ≥2.0, or ≥2.2, or ≥2.4.

[0054] The absorption functional layer 22 is used to reduce the visible light transmittance of the coated glass 1, reduce the emissivity e of the coated glass 1, and the like. The material of the absorption functional layer 22 is selected from at least one element of Si, Ni, Cr, Al, Ti, Nb, Mo, Sn, Zn, Zr, Mg, or an alloy, or an oxide, or a nitride, or a nitride oxide. At the same time, the low-transmittance heat-insulating layer 20 is disposed on the substrate 10 and used nakedly, and the absorption functional layer 22 does not select any one of silver, silver alloy and gold.

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

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

[0057] Among them, the outermost low refractive index layer 23 is used to cooperate with the dielectric layer 21 to reduce the visible light reflectivity of the coated glass 1. When the coated glass 1 is installed on the vehicle, the low-transmittance heat-insulating layer 20 is arranged facing the interior space of the vehicle to reduce the visible light reflectivity of the coated glass 1 in the vehicle. The refractive index of the outermost low refractive index layer 23 is less than or equal to 1.7, and can be specifically exemplified as 1.7, or 1.6, or 1.5, or 1.4, or 1.3, or 1.2. 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 the oxide of at least one element of Al, Mg, Zn, Si, Zr, Sn, Ca, and V. Specifically, it can be exemplified as Al2O3, SiO2, SiBOx, SiTiOx, SiAlOx, SiZrOx, etc.

[0058] The physical thickness of the low-permeability heat-insulating layer 20 is 150nm to 500nm, which is conducive to balancing the performance and production cost of the low-permeability heat-insulating layer 20. Specifically, it can be 150nm, or 160nm, or 170nm, or 180nm, or 190nm, or 200nm, or 210nm, or 220nm, or 230nm, or 240nm, or 250nm, or 260nm, or 270nm, or 280nm, or 290nm, or 300nm, or 350nm, or 400nm, or 450nm, or 500nm, etc. Preferably, the physical thickness of the low-permeability heat-insulating layer 20 is 200nm to 400nm. More preferably, the physical thickness of the low-permeability heat-insulating layer 20 is 220nm to 300nm.

[0059] The total physical thickness of the absorption functional layer 22 is 15nm to 100nm, which is conducive to balancing the performance and production cost of the low-transmittance thermal insulation layer 20. Specifically, it can be 15nm, or 18nm, or 20nm, or 30nm, or 40nm, or 50nm, or 60nm, or 70nm, or 80nm, or 90nm, or 100nm, etc. 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-transmittance thermal insulation layer 20 will not be able to achieve the set function. If the total physical thickness of the absorption functional layer 22 is too large, the production difficulty and production cost of the low-transmittance thermal insulation layer 20 will increase. Compared with the low-emissivity layer in the related art, the total physical thickness of the transparent conductive oxide layer is generally greater than 100nm, or even greater than 200nm. The total physical thickness of the absorption functional layer 22 set in the present application is thinner, which can significantly reduce production costs and improve production efficiency.

[0060] The physical thickness of the outermost low refractive index layer 23 is ≥20nm, and specifically, it can be 20nm, or 30nm, or 40nm, or 50nm, or 60nm, or 70nm, or 80nm, or 90nm, or 100nm, etc. Preferably, the physical thickness of the outermost low refractive index layer 23 is ≥40nm, and more preferably, the physical thickness of the outermost low refractive index layer 23 is ≥60nm. If the physical thickness of the outermost low refractive index layer 23 is too small, it is difficult to reduce the in-vehicle visible light reflectivity of 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, and more preferably ≤120nm.

[0061] The physical thickness of the dielectric layer 21 closest to the substrate 10 is 20 nm to 100 nm, and specifically can be 20 nm, or 25 nm, or 30 nm, or 35 nm, or 40 nm, or 45 nm, or 50 nm, or 55 nm, or 60 nm, or 65 nm, or 70 nm, or 75 nm, or 80 nm, or 85 nm, or 90 nm, or 95 nm, or 100 nm, etc. Among them, the 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, the innermost dielectric layer 21 is in direct contact with the substrate 10, and the innermost dielectric layer 21 is used to protect the innermost absorption functional layer 22 and improve the mechanical properties of the low-transmittance thermal insulation layer 20, etc. Preferably, the physical thickness of the dielectric layer 21 closest to the substrate 10 is 25 nm to 90 nm, and more preferably, the physical thickness of the dielectric layer 21 closest to the substrate 10 is 30 nm to 80 nm.

[0062] The physical thickness of the dielectric layer 21 between two adjacent absorption functional layers 22 is 20nm to 100nm, and specifically can be 20nm, or 25nm, or 30nm, or 35nm, or 40nm, or 45nm, or 50nm, or 55nm, or 60nm, or 65nm, or 70nm, or 75nm, or 80nm, or 85nm, or 90nm, or 95nm, or 100nm, etc. Among them, the dielectric layer 21 between two adjacent absorption functional layers 22 is also called the intermediate dielectric layer 21, and the intermediate dielectric layer 21 is used to protect the absorption functional layer 22 and adjust the mechanical properties, optical properties and appearance color of the low-transmittance thermal 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, and specifically can be 35nm, 30nm, 25nm, 20nm, 15nm, 10nm, 5nm, etc. Among them, the absorption functional layer 22 closest to the substrate 10 is also called the innermost absorption functional layer 22. If the thickness of the innermost absorption functional layer 22 is too small, it is not conducive to realizing the set function of the low-transmittance thermal 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 production of the low-transmittance thermal 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 farthest from the substrate 10 is less than the physical thickness of the absorption functional layer 22 closest to the substrate 10. The physical thickness of the absorption functional layer 22 farthest from the substrate 10 is 1 nm to 16 nm, and specifically can be 16 nm, or 15 nm, or 13 nm, or 12 nm, or 10 nm, or 8 nm, or 6 nm, or 5 nm, or 3 nm, or 1 nm, etc. The absorption functional layer 22 farthest from the substrate 10 is also called the outermost absorption functional layer 22. If the thickness of the outermost absorption functional layer 22 is too small, it is not conducive to realizing the set function of the low-transmittance heat insulation layer 20 and increasing the difficulty of production. If the thickness of the outermost absorption functional layer 22 is too large, it will cause the in-vehicle visible light reflectivity of the coated glass 1 to be too large, thereby causing serious reflection inside the vehicle. Preferably, the physical thickness of the absorption functional layer 22 farthest from the substrate 10 is 2 nm to 12 nm. More preferably, the physical thickness of the absorption functional layer 22 farthest from the substrate 10 is 3 nm to 8 nm.

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

[0066] In some embodiments, the low-permeability heat-insulating 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 5nm to 30nm. Among them, the absorption functional layer 22 located between the innermost absorption functional layer 22 and the outermost absorption functional layer 22 is also called the intermediate absorption functional layer 22. The low-permeability heat-insulating 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 realizing the set function of the low-permeability heat-insulating layer 20. If the thickness of the intermediate absorption functional layer 22 is too large, it is not conducive to the film system design and production of the low-permeability heat-insulating layer 20. Preferably, the physical thickness of the intermediate absorption functional layer 22 is 7.5nm to 25nm.

[0067] In one embodiment, the outermost low refractive index layer 23 is in direct contact with the absorption functional layer 22 farthest 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 embodiments, a dielectric layer 21 is further provided between the outermost low refractive index layer 23 and the absorption functional layer 22 farthest from the substrate 10, that is, the dielectric layer 21 farthest from the substrate 10, also referred to as the outermost dielectric layer 21, the physical thickness of the outermost dielectric layer 21 is 5nm to 50nm, and the intermediate dielectric layer 21 is used to protect the absorption functional layer 22 and 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 farthest from the substrate 10 is 8nm to 40nm, and more preferably, the physical thickness of the dielectric layer 21 closest to the substrate 10 is 10nm to 35nm.

[0069] Among them, in order to better achieve that the optical properties, mechanical properties, appearance color and other aspects of the low-transmittance thermal insulation layer 20 meet the comprehensive requirements of vehicle window glass, the dielectric layer 21 can be a single-layer structure or a multi-layer structure, for example, including at least two dielectric sublayers, and the difference in refractive index between two adjacent dielectric sublayers 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. 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 specifically can be 1.2, or 1.4, or 1.6, or 1.8, or 2, or 2.2, or 2.4, or 2.6, or 2.8, or 3, or 3.5, or 4, or 4.5, or 5, etc. 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. 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-transmittance heat-insulating layer 20 is 0.36≤e<0.5, and the emissivity of the coated glass without the low-transmittance heat-insulating layer 20 is about 0.9. The coated glass 1 with a 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, which can be 0.5, or 0.48, or 0.47, or 0.46, or 0.45, or 0.44, or 0.43, or 0.42, or 0.41, or 0.40, or 0.39, or 0.38, or 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 the present application has a medium emissivity e, which can effectively block the heat exchange between the inside and outside of the vehicle, and achieve the effects of heat insulation in summer and heat preservation in winter without requiring sunshades in the vehicle.

[0072] In other embodiments, the coated glass 1 has a low emissivity, that is, the emissivity e of the coated glass measured from the side of the low-transmittance heat-insulating layer 20 is 0.10≤e≤0.35, and the emissivity of the coated glass without the low-transmittance heat-insulating layer 20 is about 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, or 0.34, or 0.33, or 0.32, or 0.31, or 0.30, or 0.29, or 0.28, or 0.27, or 0.26, or 0.25, or 0.20, or 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 the present application has a low emissivity e, and can effectively block the heat exchange between the inside and outside of the vehicle, thereby achieving the effects of heat insulation in summer and heat preservation in winter without requiring sunshades in the vehicle.

[0073] In the present application, the coated glass 1 has a medium emissivity or a low emissivity, and the low-transmittance thermal insulation layer 20 can make the emissivity e of the coated glass 1 measured from the side of the low-transmittance thermal insulation layer 20 less than or equal to 0.5, and the low-transmittance thermal insulation layer 20 includes at least one absorption functional layer 22, and the absorption functional layer 22 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 thermal insulation layer 20 does not include a transparent conductive oxide layer, and 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). The present application utilizes an absorption functional layer 22 to replace the transparent conductive oxide layer in the related art, and can achieve the effect of reducing the visible light transmittance without adding additional visible light absorbing materials. Compared with the magnetron sputtering efficiency of transparent conductive oxides, the absorption functional layer 22 used in the present application can further improve the magnetron sputtering efficiency, thereby improving the production efficiency of the low-transmittance thermal insulation layer 20.

[0074] The visible light transmittance TL of the coated glass 1 is ≤15%, which can be specifically 15%, 14%, 13%, 12%, 11%, 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, etc. Preferably, the visible light transmittance TL of the coated glass 1 is ≤10%, and 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%. Furthermore, the visible light transmittance TL of the coated glass 1 is ≤2%. The coated glass 1 provided in the present application has a lower visible light transmittance TL, so that the coated glass 1 can prevent the occupants from being dazzled by sunlight, and has the effect of protecting privacy and preventing glare.

[0075] The present application also provides a vehicle window glass 2, which includes a first glass plate 11, an adhesive layer 12, and the coated glass 1 as described above in the present application, wherein 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, and the low-transmittance thermal insulation layer 20 is arranged on the fourth surface 132.

[0076] Specifically, Figure 4As shown, the first glass plate 11 serves as the outer glass plate of the vehicle window glass 2, and the first glass plate 11 has a first surface 111 and a second surface 112, the first surface 111 is away from the bonding layer 12 and is in contact with the vehicle exterior environment, and the second surface 112 is close to the bonding layer 12; the substrate 10 serves as the inner glass plate of the vehicle window glass 2, and the substrate 10 has a third surface 131 and a fourth surface 132, the third surface 131 is close to the bonding layer 12, and the fourth surface 132 is away from the bonding layer 12 and close to the vehicle interior environment; the bonding layer 12 connects the second surface 112 and the third surface 131, and the low-transmittance thermal insulation layer 20 is arranged on the fourth surface 132.

[0077] The thickness of the first glass plate 11 is 0.7 mm to 4.0 mm, and the visible light transmittance of the first glass plate 11 is ≥70%, or ≥80%, or ≥90%. The first glass plate 11 is transparent glass or ultra-transparent glass (ultra-white glass). The total iron content (expressed as Fe 2 O 3 The total iron content (in terms of Fe) of the ultra-clear glass (ultra-white glass) is less than or equal to 0.1%, or even less than or equal to 0.05%, and the visible light transmittance of the transparent glass is 80% to 95%. 2 O 3 The ultra-transparent glass has a visible light transmittance of 90% to 95%. For example, the outer glass plate can be a transparent glass with a thickness of 2.1 mm and a visible light transmittance of 89%. The thickness of the outer glass plate is preferably 1.6 mm to 3.5 mm. The present application uses transparent glass or ultra-transparent glass as the first glass plate 11, which is beneficial to reducing the cost of the vehicle window glass 2 and can reduce the absorption of infrared rays when used in conjunction with the infrared reflection layer, and can maximize the infrared reflection function of the infrared reflection layer, which is beneficial to improving the heat insulation performance of the vehicle window glass 2.

[0078] The bonding layer 12 may be a transparent thermoplastic polymer film or a lightly colored thermoplastic polymer film, and the thickness of the bonding layer 12 is 0.38 mm to 2.28 mm. For example, the thickness of the bonding layer 12 may 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 may be selected from at least one of polyvinyl butyral (PVB), polyurethane (PU), ethylene-vinyl acetate copolymer (EVA) and ionomer (SGP).

[0079] Optionally, the visible light transmittance of the bonding layer 12 is ≥70%, or ≥80%, or ≥85%. When the bonding 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 bonding layer 12 can be, but is not limited to, 85%, 90%, or 95%.

[0080] In the related art, the bonding layer 12 uses a dark colored thermoplastic polymer film, and the visible light transmittance of the dark colored thermoplastic polymer film is ≤44%, such as a gray PVB with a visible light transmittance of 28%, a gray PVB with a visible light transmittance of 12%, a gray PVB with a visible light transmittance of 8%, a gray PVB with a visible light transmittance of 5%, a gray PVB with a visible light transmittance of 2%, etc. Alternatively, the present application can use a light colored thermoplastic polymer film, and the visible light transmittance of the light colored thermoplastic polymer film is ≥70%, or ≥80%. When the bonding 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 bonding layer 12 can be, but is not limited to, 70%, 75%, 80%, or 85%, or 90%, etc. The light colored thermoplastic polymer film can be a light gray thermoplastic polymer film, a light green thermoplastic polymer film, or a light blue thermoplastic polymer film.

[0081] Optionally, the adhesive layer 12 may be a single-layer structure or a multi-layer structure, and the multi-layer structure may be exemplified by a double-layer structure, a three-layer structure, a four-layer structure, a five-layer structure, etc. The adhesive layer 12 may also have other functions, such as adding an infrared absorber to provide sunscreen or heat insulation functions, or adding an ultraviolet absorber to provide ultraviolet shielding functions, or at least one layer of the multi-layer structure may have a higher plasticizer content to provide sound insulation functions.

[0082] The thickness of the substrate 10 is 0.7 mm to 3.5 mm, and the visible light transmittance of the substrate 10 is ≥70%, or ≥80%, or ≥85%, or ≥90%. The substrate 10 is transparent glass, extra-transparent glass or lightly tinted glass; the total iron content (in terms of Fe 2 O 3 The total iron content (in terms of Fe) of the ultra-clear glass (ultra-white glass) is less than or equal to 0.1%, or even less than or equal to 0.05%, and the visible light transmittance of the transparent glass is 80% to 95%. 2 O 3 The ultra-transparent glass has a visible light transmittance of 90% to 95%.

[0083] Optionally, the substrate 10 is made of dark tinted glass, the visible light transmittance of the dark tinted glass is ≤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 made of lightly tinted glass, and the visible light transmittance of the lightly tinted glass is ≥70%, or ≥80%, or ≥85%. For example, the substrate 10 can be a transparent glass with a thickness of 2.1 mm and a visible light transmittance of 89%, or a green glass with a thickness of 1.6 mm and a visible light transmittance of 83%, or a green glass with a thickness of 2.1 mm and a visible light transmittance of 80%. The present application uses transparent glass, ultra-transparent glass or lightly tinted glass as the substrate 10, which is beneficial to reducing the cost of the vehicle window glass 2, and can maximize the function of the low-transmittance heat-insulating layer 20 when used in conjunction with the low-transmittance heat-insulating layer 20; compared with dark tinted glass, it can also reduce the difficulty of the glass forming process and improve the quality of glass forming.

[0085] Optionally, a dimming film is provided between the first glass plate 11 and the substrate 10, and the dimming film may 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%, such as 3%, 2%, 1%, 0.5%, 0%. In addition, the maximum visible light transmittance of the dimming film is set as required, such as 10%, 20%, 30%, 50%, 70%, 80%, etc. For example, the visible light transmittance of the dimming film can be adjusted between 0% and 20%, between 0.5% and 50%, between 1% and 70%, etc. The dimming film can meet the requirements of visible light transmittance 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%) to improve the contrast between the displayed image and the displayed background. When no display is performed, the dimming film is in a transparent state (visible light transmittance is greater than or equal to 70%) to achieve transparency in a larger area of ​​the vehicle window glass 2. The dimming film is arranged in the bonding layer 12. For example, the bonding layer 12 can be two thermoplastic polymer films, and the dimming film is sandwiched between the two thermoplastic polymer films.

[0086] The present application also provides a vehicle window glass, which is only the coated glass provided in the present application, and the thickness of the substrate 10 is 2.5 mm to 8 mm. It is understood that the coated glass can be formed into tempered glass through the automobile glass production process, and can be used alone as a vehicle window glass, such as a side window glass, a skylight glass or a rear windshield.

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

[0088] The vehicle window glass provided by the present application has a low visible light transmittance TL and a low emissivity e by setting a low-transmittance heat-insulating layer, and can replace the dark PVB film or dark tinted glass in the related art, so that the coated glass has the effects of low cost, simple manufacturing and production, and privacy protection. In addition, the coated glass can be used alone as vehicle window glass, or it can be made into vehicle window glass as vehicle window glass, which can block heat and omit the setting of the sunshade in the vehicle, thereby obtaining a larger height space inside the vehicle and improving the user experience.

[0089] In order to make the purpose and advantages of the present application clearer, the effects of the coated glass of the present application are further described in detail below in conjunction with 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 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 production process, a low-transmittance heat-insulating layer 20 is deposited on the substrate 10 of Examples 1-3, and an ITO low-emissivity layer is deposited on the 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 coated glass of Comparative Example 1 and Examples 1-3

[0094]

[0095] Comparative Example 2-5: A 2.1 mm thick transparent glass 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 automobile glass production process, a low-transmittance heat-insulating layer 20 is deposited on the substrate 10 of Comparative Example 2-5.

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

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

[0098]

[0099]

[0100] Example 4-6: A 2.1 mm thick green glass is used as the substrate 10, and the visible light transmittance of the substrate 10 is 83%. According to the magnetron sputtering process and the automobile glass production process, a low-transmittance heat-insulating layer 20 is deposited on the substrate 10 of Example 4-6.

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

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

[0103]

[0104] Example 7-9: A 2.1 mm thick transparent glass 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 automobile glass production process, a low-transmittance heat-insulating layer 20 is deposited on the substrate 10 of Example 7-9.

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

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

[0107]

[0108] Embodiment 10-12: A 2.1 mm thick transparent glass 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 automobile glass production process, a low-transmittance heat-insulating layer 20 is deposited on the substrate 10 of Embodiment 10-12.

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

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

[0111]

[0112]

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

[0114] Emissivity e: Use an emissivity meter to measure and calculate the emissivity of the coated glass from the side of the low-transmittance insulation layer.

[0115] Visible light transmittance TL: According to the standard ISO9050, the visible light transmittance of coated glass is measured and calculated.

[0116] Visible light reflectance RL: According to the standard ISO9050, the visible light transmittance of the coated glass is measured and calculated from the side of the low-transmittance insulation layer.

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

[0118] Total physical thickness of the functional layer Emissivity 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％ Embodiment 11 36.3nm 0.23 1.85％ 1.70％ Example 12 36.3nm 0.23 1.88％ 0.28％

[0119] Comparative Example 1 adopts the ITO low-emissivity layer in the related art, the total physical thickness of the ITO functional layer is greater than 100nm, the visible light transmittance of the coated glass is ≥60% and the visible light reflectivity is greater than 5%. In order to make the visible light transmittance of the final window glass ≤15% and the visible light reflectivity ≤5%, it is usually necessary to use expensive dark-colored thermoplastic polymer films, such as dark gray PVB, or use dark-colored glass as a matching piece to make laminated glass.

[0120] Comparative Examples 2-5 all have low-transmittance heat-insulating layers on the substrates. 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 satisfy ≥20nm, resulting in the visible light reflectivity of the coated glass being greater than 15%. When the coated glass is made into vehicle window glass, the reflection phenomenon inside the vehicle will be serious.

[0121] The low refractive index layer in Comparative Example 3 includes only one absorbing functional layer, and the emissivity e of the coated glass is greater than 0.6, which cannot achieve a low-radiation effect. In addition, the visible light transmittance of the coated glass is relatively high, and it cannot be a good substitute for the dark PVB film or dark tinted glass in the related art.

[0122] The physical thickness of the absorption functional layer closest to the substrate surface in Comparative Example 4 is too large, greater than 40 nm. As a result, after the coated glass forms the window glass, the visible light reflectivity on the outside of the window glass is greater than 25%, causing serious light pollution outside the vehicle and low environmental friendliness to pedestrians or other vehicles outside the vehicle.

[0123] The physical thickness of the absorption functional layer farthest from the substrate surface in Comparative Example 5 is too large, greater than 20 nm, resulting in the visible light reflectivity of the inner side of the window glass being greater than 14% after the coated glass forms the window glass, causing serious reflection phenomenon inside the car.

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

[0125] In summary, the coated glass and window glass provided by the present application have a lower visible light transmittance TL and a lower emissivity e, and the dark PVB film in the related technology can be omitted, thereby having the effects of low cost, simple manufacturing and production, and privacy protection. In addition, it can also block heat and omit the setting of sunshades in the vehicle, thereby obtaining a larger height space inside the vehicle and improving the user experience.

[0126] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0127] Mentioning "embodiment" and "implementation method" in this application means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrases in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments. In addition, it should also be understood that the features, structures or characteristics described in the various embodiments of the present application can be arbitrarily combined to form another embodiment that does not deviate from the spirit and scope of the technical solution of the present application, provided that there is no contradiction between them.

[0128] The above is part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A coated glass, characterized in that: The coated glass comprises a substrate and a low-transmittance heat-insulating layer arranged on at least one surface of the substrate, the low-transmittance heat-insulating layer comprises at least two dielectric layers and at least two absorption functional layers stacked, and each of the absorption functional layers is located between two adjacent dielectric layers; The visible light transmittance of the coated glass is less than or equal to 15%.

2. The coated glass according to claim 1, characterized in that: The low-transmittance heat-insulating layer further includes an outermost low-refractive-index layer, which is disposed farthest from the substrate, and has a refractive index less than or equal to 1.

7.

3. The coated glass according to claim 1, characterized in that: The low-transmittance heat-insulating layer does not include a transparent conductive oxide layer, and 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).

4. The coated glass according to claim 1, characterized in that: The material of the dielectric layer is selected from the nitride, oxide, or oxynitride of at least one element among Zn, Sn, Ti, Si, Al, Ni, Cr, Nb, Mg, Zr, Ga, Y, In, Sb, V, and Ta.

5. The coated glass according to claim 4, characterized in that: 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.

6. The coated glass according to claim 1, characterized in that: The material of the absorption functional layer is selected from a single substance or alloy or oxide, nitride or nitrogen oxide of at least one element among Si, Ni, Cr, Al, Ti, Nb, Mo, Sn, Zn, Zr and Mg.

7. The coated glass according to claim 1, characterized in that: The physical thickness of the low-transmittance heat-insulating layer is 150nm to 500nm, or 200nm to 400nm, or 220nm to 300nm.

8. The coated glass according to claim 1, characterized in that: The total physical thickness of the absorption functional layer is 15nm to 100nm, or 18nm to 80nm, or 20nm to 60nm.

9. The coated glass according to claim 2, characterized in that: The physical thickness of the outermost low refractive index layer is ≥20 nm, or ≥40 nm, or ≥60 nm.

10. The coated glass according to claim 1, characterized in that: The physical thickness of the dielectric layer closest to the substrate in the low-transmittance heat-insulating layer is 20 nm to 100 nm, or 25 nm to 90 nm, or 30 nm to 80 nm.

11. The coated glass according to claim 1, characterized in that: The physical thickness of the dielectric layer located between two adjacent absorption functional layers in the low-transmittance heat-insulating layer is 20nm to 100nm, or 30nm to 80nm, or 35nm to 75nm.

12. The coated glass according to claim 1, characterized in that: The physical thickness of the absorption functional layer closest to the substrate is 5nm to 35nm, or 8nm to 30nm, or 10nm to 25nm.

13. The coated glass according to claim 12, characterized in that: The physical thickness of the absorption functional layer farthest from the substrate is smaller than the physical thickness of the absorption functional layer closest to the substrate; The physical thickness of the absorption functional layer farthest from the substrate is 1 nm to 16 nm, or 2 nm to 12 nm, or 3 nm to 8 nm.

14. The coated glass according to claim 13, characterized in that: 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 to 0.9, or 0.35 to 0.

85.

15. The coated glass according to claim 12, characterized in that: The low-transmittance heat-insulating layer comprises 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.

16. The coated glass according to claim 2, characterized in that: The outermost low refractive index layer is in direct contact with the absorption functional layer farthest from the substrate.

17. The coated glass according to claim 2, characterized in that: The dielectric layer is provided between the outermost low refractive index layer and the absorption functional layer farthest from the substrate; the physical thickness of the dielectric layer is 5nm to 50nm, or 8nm to 40nm, or 10nm to 35nm.

18. The coated glass according to claim 17, characterized in that: 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 1.2-5, or 1.5-4.5, or 2-4.

19. The coated glass according to claim 1, characterized in that: The material of the substrate is soda-lime glass, high-aluminum glass, lithium-aluminum glass, borosilicate glass, polyethylene terephthalate, or polycarbonate.

20. The coated glass according to claim 1, characterized in that: The substrate is transparent glass, extra-transparent glass or lightly tinted glass, the visible light transmittance of the transparent glass is greater than or equal to 80%, the visible light transmittance of the extra-transparent glass is greater than or equal to 90%, and the visible light transmittance of the lightly tinted glass is greater than or equal to 70%.

21. The coated glass according to claim 1, characterized in that: The emissivity e of the coated glass measured from the side of the low-transmittance heat-insulating layer is 0.36≤e<0.5, or 0.40≤e≤0.

48.

22. The coated glass according to claim 1, characterized in that: The emissivity e of the coated glass measured from the side of the low-transmittance heat-insulating layer is 0.10≤e≤0.35, or 0.2≤e≤0.

3.

23. The coated glass according to claim 1, characterized in that: The visible light transmittance TL of the coated glass is ≤10%, or ≤8%, or ≤5%, or ≤2%.

24. The coated glass according to claim 1, characterized in that: The visible light reflectivity RL of the coated glass is ≤5%, or ≤3%, or ≤2%, or ≤1%.

25. A vehicle window glass, characterized in that: The vehicle window glass includes a first glass plate, an adhesive layer, and a coated glass as described in any one of claims 1 to 24, wherein the first glass plate has a first surface and a second surface, the substrate has a third surface and a fourth surface, the adhesive layer connects the second surface and the third surface, the thickness of the substrate is 0.7 mm to 3.5 mm, and the low-transmittance thermal insulation layer is arranged on the fourth surface.

26. A vehicle window glass, characterized in that: The vehicle window glass is only the coated glass as described in any one of claims 1 to 24, and the thickness of the substrate is 2.5 mm to 8 mm.

Images