Low-radiation coated laminated glass

Abstract

The utility model relates to the field of glass products, in particular to low-emissivity coated laminated glass, which solves the problem that the performance of the existing low-emissivity coated laminated glass cannot be maintained, and comprises an outer-layer glass substrate, a middle glass substrate and an inner-layer glass substrate, the peripheral edges of the outer-layer glass substrate, the middle glass substrate and the inner-layer glass substrate are provided with composite edge sealing structures and form two hollow cavities at intervals, the hollow cavities are filled with inert gas, and the outer surface of the outer-layer glass substrate is sequentially provided with a high-refractive-index pre-coating layer, an anti-dazzle layer and a low-refractive-index coating layer; one side, close to the outer-layer glass substrate, of the middle glass substrate is plated with a Lowe film layer; an antireflection film layer is arranged on the surface of one side, close to the middle glass substrate, of the inner-layer glass substrate, and the composite edge sealing structure sequentially comprises a metal sheet layer, a flexible adhesive layer and an outer welding layer from inside to outside.

Description

Technical Field

[0001] This utility model relates to the field of glass products, specifically to a low-emissivity coated laminated glass. Background Technology

[0002] Currently, in glass products, low-emissivity coated glass, also known as Low-E glass, is often used to reduce radiation. As shown in Chinese patent application CN 114105490 A, this technology describes a low-emissivity coated glass comprising a glass substrate, a low-emissivity film layer, and an easy-clean coating. The low-emissivity film layer is disposed on the surface of the glass substrate, and the easy-clean coating layer is disposed on the surface of the low-emissivity film layer. The thickness ratio of the easy-clean coating layer to the low-emissivity film layer is less than or equal to 1:10. The emissivity of the low-emissivity coated glass is 0.01–0.25, and the easy-clean coating layer is formed using a coating containing a fluorosilane coupling agent.

[0003] As can be seen, the common practice in the industry is to coat a material onto a glass substrate to form a low-emissivity film to obtain the desired product. However, in this simple structure, silver (Ag), as the core functional layer of the low-emissivity film, is easily oxidized, leading to performance degradation. Utility Model Content

[0004] Therefore, this invention provides a low-emissivity coated laminated glass, which solves the problem that the performance of current low-emissivity coated laminated glass cannot be maintained.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A low-emissivity coated laminated glass includes an outer glass substrate, a middle glass substrate, and an inner glass substrate. The outer glass substrate, the middle glass substrate, and the inner glass substrate have a composite edge-sealing structure around their perimeters and form two hollow cavities at intervals. The hollow cavities are filled with inert gas. The outer surface of the outer glass substrate is sequentially coated with a high refractive index pre-coating layer, an anti-glare layer, and a low refractive index coating.

[0007] The middle glass substrate is coated with a Lowe film layer on the side closest to the outer glass substrate;

[0008] An anti-reflective coating is provided on the side of the inner glass substrate near the middle glass substrate;

[0009] The composite edge sealing structure comprises, from the inside out, a metal sheet layer, a flexible adhesive layer, and an outer welding layer. The metal sheet layer is embedded at the edge of the hollow cavity, the flexible adhesive layer fills the gap between the metal sheet layer and each glass substrate, and the outer welding layer completely covers each glass substrate, the metal sheet layer, and the flexible adhesive layer.

[0010] Preferably, sealing grooves are provided on both sides of each of the metal sheet layers, and the sealing grooves are filled with molecular sieve layers.

[0011] Preferably, the metal sheet layer is made of copper or nickel alloy and has a thickness of 0.05-0.1 mm; the outer welding layer is composed of an aluminum-magnesium alloy foil layer and a glass brazing filler layer and has a thickness of 0.2-0.5 mm.

[0012] Preferably, the outer surface of the outer welded layer is provided with a curing protective layer.

[0013] Preferably, the high refractive index pre-coating has a refractive index of 1.6-1.7, the low refractive index coating has a refractive index of 1.3-1.4, and the difference between the two refractive indices is 0.3-0.4.

[0014] Preferably, the Lowe film has a double silver structure, an emissivity of ≤0.11, and a film thickness of 6-12 nm.

[0015] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0016] Based on basic low-emissivity coated glass, this technical solution designs a three-layer structure with two hollow cavities, embedding the Lowe coating layer on the inner middle glass substrate. The double hollow cavity design, combined with the filling of inert gas, provides sufficient protection for the Lowe coating layer, reduces the probability of performance degradation caused by oxidation, and ensures long-term performance maintenance.

[0017] The innovative three-layer low-reflection structure design on the outer glass substrate adopts a structure of "high refractive index pre-coating + anti-glare layer + low refractive index layer", which simplifies the process and enhances the anti-reflection effect.

[0018] The inner glass substrate is equipped with an anti-reflection coating, which improves the overall light transmittance. Combined with the anti-glare and low-reflection structure of the outer glass substrate and the infrared blocking function of the Lowe film layer of the middle glass substrate, and with the hollow cavity, the photothermal performance is synergistically optimized.

[0019] The designed composite edge-sealing structure can reduce thermal expansion mismatch, reduce the thermal bridging effect of the edge-sealing, and improve corrosion resistance. Attached Figure Description

[0020] Figure 1 This is a cross-sectional structural diagram of the glass in an embodiment of the present utility model;

[0021] Figure 2 for Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0022] Reference numerals: 1. Outer glass substrate; 11. High refractive index pre-coating; 12. Anti-glare layer; 13. Low refractive index coating; 2. Middle glass substrate; 21. Low-reflection film layer; 3. Inner glass substrate; 31. Anti-reflection film layer; 4. Composite edge sealing structure; 41. Metal sheet layer; 42. Flexible adhesive layer; 43. Outer welding layer; 44. Molecular sieve layer; 45. Curing protective layer. Detailed Implementation

[0023] The following will describe the implementation of this utility model in detail with reference to specific embodiments, so that the process of how this utility model uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Example

[0024] refer to Figure 1 and Figure 2 A low-emissivity coated laminated glass includes an outer glass substrate 1, a middle glass substrate 2, and an inner glass substrate 3. The outer glass substrate 1, the middle glass substrate 2, and the inner glass substrate 3 are provided with a composite edge sealing structure 4 around their perimeters and form two hollow cavities at intervals. The hollow cavities are filled with an inert gas, which is argon or krypton. The thickness of the hollow layer is 12-16 mm. The spacer frame is formed by high-frequency welding of 3003 alloy aluminum strips.

[0025] The outer surface of the outer glass substrate 1 is sequentially provided with a high refractive index pre-coating layer 11, an anti-glare layer 12, and a low refractive index coating 13; wherein, the high refractive index pre-coating layer 11 has a refractive index of 1.6-1.7, the low refractive index coating 13 has a refractive index of 1.3-1.4, and the difference between the two refractive indices is 0.3-0.4.

[0026] The middle glass substrate 2 is coated with a Lowe film 21 on the side near the outer glass substrate 1. The Lowe film 21 has a double silver structure, an emissivity of ≤0.11, and a film thickness of 6-12 nm.

[0027] An anti-reflective coating 31 is provided on the side of the inner glass substrate 3 near the middle glass substrate 2. Based on the basic low-emissivity coated glass, this technical solution designs a three-layer structure with two cavities, in which the Lowe coating 21 is embedded in the inner middle glass substrate 2. The double cavity design combined with the filling of inert gas provides sufficient protection for the Lowe coating 21, reduces the probability of performance degradation caused by oxidation, and ensures long-term performance maintenance.

[0028] The innovative three-layer low-reflection structure design on the outer glass substrate 1 adopts the structure of "high refractive index pre-coating layer 11 + anti-glare layer 12 + low refractive index layer", which simplifies the process and enhances the anti-reflection effect.

[0029] The inner glass substrate 3 is provided with an anti-reflection film layer 31, which improves the overall light transmittance. Combined with the anti-glare and low-reflection structure of the outer glass substrate 1 and the infrared blocking function of the Lowe film layer 21 of the middle glass substrate 2, and with the hollow cavity, the photothermal performance is synergistically optimized.

[0030] During production, the outer glass substrate 1 is coated with a high refractive index pre-coating 11, an anti-glare layer 12, and a low refractive index coating 13 sequentially by magnetron sputtering. The inner side of the middle glass substrate 2 is coated with a Lowe film layer 21. The inner side of the inner glass substrate 3 is coated with an anti-reflection film layer 31 by sol-gel method. Then, it is encapsulated to form a hollow cavity, filled with argon gas and sealed.

[0031] Based on the above, the following parameters were used in the experiment:

[0032] The outer glass substrate 1, the middle glass substrate 2, and the inner glass substrate 3 are all made of ultra-clear glass with a thickness of 3mm;

[0033] The low-reflection film is specifically: a high refractive index pre-coating 11 ( (Refractive index 1.65), low refractive index coating 13 ( (Refractive index 1.38).

[0034] Lowe film 21: double silver structure (Ag layer thickness 8nm, emissivity 0.10);

[0035] Experimental data:

[0036]

[0037] Based on the above, the design differs from traditional edge sealing: the composite edge sealing structure 4 includes, from the inside out, a metal sheet layer 41, a flexible adhesive layer 42, and an outer welding layer 43. The metal sheet layer 41 is embedded at the edge of the hollow cavity, the flexible adhesive layer 42 fills the gap between the metal sheet layer 41 and each glass substrate, and the outer welding layer 43 covers each glass substrate, the metal sheet layer 41, and the flexible adhesive layer 42.

[0038] The designed composite edge-sealing structure 4 features a metal sheet layer 41 made of copper or nickel alloy with a thickness of 0.05-0.1 mm. This layer allows for low-stress bonding with each glass substrate layer via vacuum diffusion welding, reducing thermal expansion mismatch. The outer welding layer 43 is composed of aluminum-magnesium alloy foil and glass brazing filler, with a thickness of 0.2-0.5 mm. It is bonded to the flexible adhesive layer 42 and the outer glass substrate 1 via laser cladding. The laser cladding process creates a gradient material interface, reducing thermal bridging and improving corrosion resistance. Furthermore, the addition of silicon carbide nanoparticles to the flexible adhesive layer 42 increases its shear strength to over 1.5 MPa (compared to approximately 0.8 MPa for conventional silicone sealant), and the thermal conductivity of the nanoparticles (silicon carbide thermal conductivity 120 W / m•K) improves edge temperature uniformity.

[0039] In this embodiment, sealing grooves are provided on both sides of each of the metal sheet layers 41, and the sealing grooves are filled with molecular sieve layers 44. The sealing groove design can extend the gas permeation path, and combined with the adsorption of residual water vapor by the molecular sieve layers 44, the annual leakage rate of inert gas in the hollow layer is ≤0.5% (compared to about 3% for conventional hollow glass).

[0040] Structurally, a curing protective layer 45 can be provided on the outer surface of the outer welding layer 43. The material is an acrylic-epoxy resin composite material with a thickness of 0.1-0.3 mm and a light transmittance of ≥90% to further improve the strength.

[0041] Further experiments were conducted under the above structure to obtain:

[0042]

[0043] The above experiments demonstrate that this technical solution, through multi-material composite and process innovation, solves problems such as thermal bridging, air leakage, and poor weather resistance in traditional edge sealing structures, achieving industry-leading comprehensive performance.

[0044] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A low-emissivity coated laminated glass, comprising an outer glass substrate (1), an intermediate glass substrate (2) and an inner glass substrate (3), the four peripheral edges of the outer glass substrate (1), the intermediate glass substrate (2) and the inner glass substrate (3) being provided with a composite edge sealing structure (4) and spaced apart to form two hollow cavities, the hollow cavities being filled with inert gas, characterized in that: the outer surface of the outer glass substrate (1) is sequentially provided with a high refractive index pre-coating layer (11), an anti-glare layer (12) and a low refractive index coating layer (13); the side of the intermediate glass substrate (2) close to the outer glass substrate (1) is coated with a Lowe film layer (21); the side of the inner glass substrate (3) close to the intermediate glass substrate (2) is provided with an anti-reflection film layer (31); the composite edge sealing structure (4) sequentially comprises a metal sheet layer (41), a flexible glue layer (42) and an outer welding layer (43) from inside to outside, the metal sheet layer (41) is embedded at the edge position of the hollow cavity, the flexible glue layer (42) fills the gap between the metal sheet layer (41) and each glass substrate, and the outer welding layer (43) covers the whole of each glass substrate, the metal sheet layer (41) and the flexible glue layer (42). Both sides of each metal sheet layer (41) are provided with a sealing groove, and the sealing groove is filled with a molecular sieve layer (44). The metal sheet layer (41) is made of copper or nickel alloy sheet with a thickness of 0.05-0.1 mm; the outer welding layer (43) is composed of an aluminum-magnesium alloy foil layer and a glass solder layer with a thickness of 0.2-0.5 mm. The outer surface of the outer welding layer (43) is provided with a solidification protective layer (45). The high refractive index pre-coating layer (11) has a refractive index of 1.6-1.7, the low refractive index coating layer (13) has a refractive index of 1.3-1.4, and the difference between the two refractive indexes is 0.3-0.

4.

2. The low-E coated glass pane according to claim 1, characterized in that: The Lowe film layer (21) has a double-silver structure with an emissivity of ≤0.11 and a film layer thickness of 6-12 nm.

3. The low-E coated glass pane according to claim 1, characterized in that: ​ 4. The low-E coated glass pane according to claim 1, characterized in that: ​ 5. A low-E coated glass pane according to any one of claims 1 to 4, characterized in that: ​ 6. A low-E coated glass pane according to any one of claims 1 to 4, characterized in that: ​

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