Preparation method of multi-layer sealed vacuum glass and vacuum glass

Abstract

The invention relates to the technical field of vacuum glass, in particular to a preparation method of multi-layer sealed vacuum glass and vacuum glass, and the preparation method comprises the following steps: firstly, fixedly arranging a closed support body with a lateral exhaust hole between two pieces of glass; secondly, vacuumizing treatment is conducted through an air exhaust hole formed in the closed supporting body, and then the air exhaust hole is sealed; then, a reinforcing material is wound on the outer surface of the closed supporting body in the to-be-processed space, and the to-be-processed space is filled with a cementing material and then solidified to form a reinforcing layer; the outer surface of the reinforcing layer is coated with a layer of weather-proof structural sealant, and finally, an ultraviolet-proof protective coating is manufactured on the outer surface of the glass. By arranging the multi-stage sealing structure in the vacuum glass, the reliability of the vacuum glass can be remarkably improved, the leakage rate of the vacuum glass is reduced, the vacuum degree maintaining capacity is improved, and the vacuum glass is high in structural strength, high in wind pressure resistance and particularly suitable for high-requirement sealing scenes such as buildings, energy-saving equipment and aerospace.

Description

Technical Field

[0001] This invention relates to the field of vacuum glass technology, specifically to a method for preparing multilayer sealed vacuum glass and the vacuum glass itself. Background Art

[0002] Vacuum glass has attracted increasing attention due to its high sound and heat insulation performance. However, the current manufacturing methods for vacuum glass generally adopt a single sealing method such as fusion sealing. This involves placing a high-strength support on the glass surface, uniformly coating it with low-temperature glass powder, and then sintering it in a furnace and drawing a vacuum. Since the fusion sealing of the glass needs to be carried out at high temperatures, it limits the choice of support material. Furthermore, vacuum glass prepared by this method is brittle and has a weak load-bearing capacity because the glass and the support are rigidly connected by a welded layer. During use, it is prone to thermal stress cracking due to external forces or temperature changes, leading to seal failure. Summary of the Invention

[0003] Based on the above problems, the present invention aims to provide a method for preparing multi-layer sealed vacuum glass with multi-stage sealing, flexible materials, and reliable process, as well as vacuum glass, to solve the technical problems of sealing failure, insufficient structural strength, and poor environmental adaptability in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this invention is: a method for preparing multilayer sealed vacuum glass, comprising the following steps:

[0005] Step 1: Primary sealing of the glass assemblies;

[0006] A pre-fabricated closed support with lateral air extraction holes is fixed between two pieces of glass, with a space reserved between the closed support and the edge of the glass for processing.

[0007] Step 2: Vacuuming;

[0008] For the glass assemblies that have completed the primary sealing, a vacuum treatment is performed using the evacuation port opened in the closed support body, and then the evacuation port is sealed.

[0009] Step 3: Install the reinforcement layer;

[0010] A reinforcing layer is applied to the outer surface of the vacuum-sealed closed support within the processing space between the two glass panes and the closed support.

[0011] The reinforcing layer is formed by wrapping reinforcing material around the outer surface of the closed support within the processing space, and then filling the processing space with cementing material and curing it.

[0012] Step 4: Set up a protective layer;

[0013] A layer of weather-resistant structural sealant is applied to the outer surface of the reinforcement layer;

[0014] Step 5: Apply a protective coating;

[0015] A protective coating is formed on the outer surface of the glass by means of coating or applying anti-ultraviolet materials on both sides of each structural layer.

[0016] Furthermore, the closed support is securely sealed to the two glass panes by adhesive bonding or welding;

[0017] Furthermore, when the closed support is fixed between the two pieces of glass by adhesive bonding, multiple through holes are opened on the surface of the closed support.

[0018] Furthermore, the closed support body is made of metal, ceramic, or high-temperature resistant plastic;

[0019] Furthermore, a support body is provided between the two glass panes and inside the closed support body, the support body being used to provide support for the two glass panes after vacuuming from the inside;

[0020] Furthermore, the reinforcing material is glass fiber, metal wire, or carbon fiber, and the cementing material is epoxy resin or silicone structural adhesive.

[0021] The present invention also provides a vacuum glass prepared according to the above preparation method.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This invention significantly improves the reliability of vacuum glass by incorporating a multi-level sealing structure within the glass. Furthermore, the synergistic effect of the multiple seals further reduces leakage and enhances vacuum retention. It also exhibits strong environmental adaptability and UV resistance, allowing for application within a temperature range of -40℃ to 300℃, with different types and properties of adhesives selected to meet varying temperature requirements. The reinforcing fibers in the reinforcing layer significantly improve overall toughness and strength, resulting in higher structural strength, which is beneficial for installation and transportation. The product also demonstrates strong wind pressure resistance. Attached Figure Description

[0024] Figure 1 This is a flowchart of a method for preparing a multilayer sealed vacuum glass according to the present invention;

[0025] Figure 2 This is a schematic diagram of a multilayer sealed vacuum glass according to the present invention;

[0026] In the diagram: 1. Glass; 2. Support; 3. Closed support; 4. Reinforcing layer; 5. Protective layer; 6. Protective coating. Detailed Implementation

[0027] The technical solutions adopted in this invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments.

[0028] First, this invention provides a method for preparing multilayer sealed vacuum glass, such as... Figure 1-2 As shown, the following steps are included:

[0029] Step 1: Primary sealing of the glass 1-piece assembly;

[0030] A pre-fabricated closed support 3 with lateral air extraction holes is fixed between two pieces of glass 1. A portion of space is reserved between the closed support 3 and the edge of the glass 1 for further sealing and reinforcement.

[0031] Furthermore, by applying a cementitious material or welding agent to the surface of the closed support 3, the closed support 3 can be firmly sealed to the two pieces of glass 1 by means of adhesive bonding or welding, so that the closed support 3 forms an annular sealing boundary between the two pieces of glass 1.

[0032] When the closed support 3 is fixed between two pieces of glass 1 using adhesive bonding, multiple through holes can be made on the surface of the closed support 3. These through holes are preferably evenly distributed along the entire closed support 3, allowing the adhesive material on the surface of the closed support 3 to pass through from one side to the other, forming micro-adhesive columns within the closed support 3 to simultaneously bond the glass 1 on both sides. This results in stronger adhesion and reduces lateral displacement of the closed support 3. Reducing the contact area and increasing the bonding area also helps to reduce heat conduction.

[0033] This process can also be completed in a vacuum environment, in which case the air extraction hole does not need to be reserved on the side of the closed support 3. If the air extraction port is located on the surface of the glass 1, the air extraction hole does not need to be reserved on the closed support 3.

[0034] The material of the closed support 3 is preferably metal such as stainless steel, ceramic such as microcrystalline glass, or high-temperature resistant plastic such as PE plastic. The material of the closed support 3 must be matched with the coefficient of thermal expansion of glass when making a specific selection.

[0035] In this embodiment, the material of the closed support 3 is 304 stainless steel frame (thickness 1.5mm and width 3mm). The closed support 3 is made into a closed structure that matches the outer edge shape of the glass 1 using a bending machine. A φ1mm air extraction hole is reserved on the side of the closed support 3. Multiple through holes with a diameter of 1mm are opened on the surface of the closed support 3. The multiple through holes are arranged at a distance of 5mm along the entire closed support 3. The closed support 3 is bonded to the two pieces of glass 1 using silicone structural adhesive. After curing for 24 hours, the primary sealing of the glass 1 is completed.

[0036] Furthermore, before the two glass pieces 1 are sealed together, a support body 2 can be installed between the two glass pieces 1 and inside the closed support body 3. The support body 2 is used to provide support for the two glass pieces 1 after vacuuming from the inside. It can be in the form of a structure with a vent frame or in the form of multiple supports evenly arranged between the two glass pieces 1. The support body 2 is fixed between the two glass pieces 1 by adhesive bonding.

[0037] Step 2: Vacuuming;

[0038] For the glass 1 sheet that has completed the primary sealing, a vacuum treatment is performed using the air extraction hole opened in the closed support 3, and then the air extraction hole is sealed.

[0039] Specifically, the glass 1 sheet that has completed the initial sealing can be placed in a sealed space. A multi-stage combined vacuum pump is used to evacuate the air through the air extraction hole of the closed support 3. During the evacuation process, a laser beam is introduced through the glass 1 to weld the low melting point metal (such as tin) or the same material as the closed support 3 at the air extraction hole. The air extraction hole is sealed while the air is being extracted, and the vacuum degree is ≤10-3Pa.

[0040] Step 3: Set up reinforcement layer 4;

[0041] A reinforcing layer 4 is provided on the outer surface of the closed support 3 after vacuuming within the processing space reserved between the edges of the two glass pieces 1 and the closed support 3.

[0042] Specifically, glass fiber, metal wire, carbon fiber and other materials are used as reinforcing materials in the pre-reserved processing space between the two pieces of glass 1 and the closed support 3. These materials are then wrapped around the outer surface of the closed support 3. After wrapping, epoxy resin or silicone structural adhesive and other cementing materials are injected to fill the processing space. After the cementing material dries, a reinforcing layer 4 is formed on the outer surface of the closed support 3. That is, the reinforcing material is cured on the outer surface of the closed support 3 using epoxy resin, silicone adhesive and other adhesives, and finally a reinforcing layer 4 containing reinforcing fibers is formed to enhance the connection strength between the closed support 3 and the glass 1 and to distribute the load on the closed support 3.

[0043] In this embodiment, glass fiber with a diameter of 10μm is used to wrap around the outer surface of the closed support 3, and then epoxy resin is injected into the reserved space to fill the space to be processed. After the epoxy resin is cured at a curing temperature of 60°C for 2 hours, a 3mm thick reinforcing layer 4 is finally formed.

[0044] Step 4: Set the protective layer 5:

[0045] Specifically, a layer of weather-resistant structural sealant, such as polyurethane adhesive, is coated on the outer surface of the reinforcement layer 4. After curing, it forms a protective layer 5 to isolate the reinforcement layer 4 from environmental erosion such as moisture and ultraviolet rays.

[0046] Step 5: Apply protective coating 6;

[0047] A protective coating 6 is formed on the outer surface of glass 1 located on both sides of each structural layer by coating, such as titanium dioxide, or by applying an anti-ultraviolet material, to protect the adhesive layer and reduce the damage of ultraviolet rays to each structural layer, thereby extending the service life of the vacuum glass.

[0048] Secondly, the present invention also provides a multi-layer sealed vacuum glass prepared according to the above method. It can be understood that the present invention can significantly improve the reliability of vacuum glass by setting a multi-level sealing structure in the vacuum glass. At the same time, the synergistic effect between the multi-layer seals can further reduce the leakage rate of vacuum glass and improve the vacuum degree maintenance ability. In addition, it has strong environmental adaptability, UV resistance, and can be used in the temperature range of -40℃ to 200℃. It also has high structural strength and strong wind pressure resistance.

[0049] Depending on the usage environment, such as different indoor and outdoor use conditions and different temperature requirements, targeted adhesive types can be selected to achieve optimal weather resistance, making it particularly suitable for high-requirement sealing scenarios in fields such as construction, energy-saving equipment, and aerospace.

[0050] Finally, the above description is only a preferred embodiment of the present invention, and the technical solutions adopted are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for preparing multilayer sealed vacuum glass, characterized in that, Includes the following steps: Step 1: Primary sealing of the glass assemblies; A prefabricated closed support with lateral vent holes is fixed between two pieces of tempered glass, with a pre-reserved processing space between the closed support and the edge of the glass. Step 2: Vacuuming; For the glass assemblies that have completed the primary sealing, a vacuum treatment is performed using the evacuation port opened in the closed support body, and then the evacuation port is sealed. Step 3: Install the reinforcement layer; A reinforcing layer is applied to the outer surface of the closed support after vacuuming within the processing space reserved between the two glass panes and the closed support. The reinforcing layer is formed by wrapping reinforcing material around the outer surface of the closed support within the processing space, and then filling the processing space with cementing material and curing it. Step 4: Set up a protective layer; A layer of weather-resistant structural sealant is applied to the outer surface of the reinforcement layer; Step 5: Apply a protective coating; A protective coating is formed on the outer surface of the glass by means of coating or applying anti-ultraviolet materials on both sides of each structural layer.

2. The method for preparing a multilayer sealed vacuum glass according to claim 1, characterized in that, The closed support is securely sealed to the two glass panels by adhesive bonding or welding.

3. The method for preparing a multilayer sealed vacuum glass according to claim 2, characterized in that, When the closed support is fixed between two pieces of glass by adhesive bonding, multiple through holes are opened on the surface of the closed support.

4. The method for preparing a multilayer sealed vacuum glass according to claim 1, characterized in that, The closed support is made of metal, ceramic, or high-temperature resistant plastic.

5. The method for preparing a multilayer sealed vacuum glass according to claim 1, characterized in that, A support is provided between the two glass panes and inside the closed support, the support being used to provide support for the two glass panes after vacuuming.

6. The method for preparing a multilayer sealed vacuum glass according to claim 1, characterized in that, The reinforcing material is glass fiber, metal wire, or carbon fiber, and the cementing material is epoxy resin or silicone structural adhesive.

7. A vacuum glass, characterized in that, The multilayer sealed vacuum glass is prepared according to any one of claims 1-6.

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