Method for manufacturing vacuum glass and vacuum glass

Abstract

The application provides a vacuum glass preparation method and vacuum glass. The preparation method of the application does not need to drill holes on the surface of the glass and arrange exhaust pipes, and directly seals the vacuum glass structure unit after vacuumizing, so as to obtain the vacuum glass, thereby simplifying the preparation process, reducing the complex steps and equipment requirements in the manufacturing process, and improving the production efficiency. The application also provides a vacuum glass.

Description

Technical Field

[0001] This invention belongs to the field of vacuum glass technology, specifically relating to a method for preparing vacuum glass and vacuum glass itself. Background Technology

[0002] Vacuum glass is gaining increasing attention due to its superior sound and heat insulation properties. Compared to insulated glass, vacuum glass can achieve the same sound and heat insulation effects with a smaller thickness, thus being considered a more advantageous building material. Currently, the mainstream vacuum glass manufacturing methods both domestically and internationally mainly involve placing high-strength supports on the glass surface, uniformly coating it with low-temperature glass powder around its perimeter, and then sintering it in a furnace and drawing a vacuum. While this process is effective, it has some significant drawbacks.

[0003] First, this method requires drilling holes in the glass surface and installing vent pipes to extract internal gases. After vacuuming, sealing is also necessary, making the entire process complex and cumbersome. Second, the thermal insulation performance of vacuum glass largely depends on the radiation characteristics of the glass surface; therefore, whether Low-E glass is used and the difference in its surface emissivity significantly affect its insulation effect. This necessitates surface coating treatment before vacuum glass fabrication to optimize its performance. Third, the low-temperature glass powder coating technology used in current methods has some problems. The uniformity of low-temperature glass powder coating and the performance stability during sintering are difficult to guarantee, which may lead to poor sealing of the vacuum chamber, thus affecting the vacuum level and long-term stability of the glass. The thickness of the vacuum chamber also limits the improvement of its sound insulation effect, thus restricting the application of vacuum glass in the market.

[0004] Therefore, in order to overcome these problems, it is necessary to develop a new method for preparing vacuum glass. Summary of the Invention

[0005] The present invention aims to at least solve one of the aforementioned technical problems existing in the prior art. To this end, the present invention provides a method for preparing vacuum glass. This method eliminates the need for additional evacuation holes, drilling holes in the glass surface, and arranging exhaust pipes. The vacuum glass structural unit is directly evacuated and then hot-pressed for sealing, thereby producing vacuum glass. This simplifies the preparation process, reduces complex steps and equipment requirements in the manufacturing process, and improves production efficiency.

[0006] The present invention also provides a vacuum glass.

[0007] A first aspect of the present invention provides a method for preparing vacuum glass, comprising the following steps:

[0008] S1: An edge sealing material is provided around the four edges of the first glass, and the joints of the edge sealing material form a splicing interface, and a thin film material is placed in the splicing interface;

[0009] S2: Cover the first glass with the second glass, the second glass and the first glass form a vacuum glass structure unit. After the vacuum glass structure unit is pressed tightly, the sealing material bonds the first glass and the second glass. Take out the film material, the splicing interface forms an air extraction hole, and the vacuum glass structure unit is evacuated and then heat-sealed.

[0010] One technical solution of the present invention relating to the preparation method of vacuum glass has at least the following beneficial effects:

[0011] The present invention discloses a method for preparing vacuum glass. First, an edge-sealing material is applied around the perimeter of a first glass unit. The joints of the edge-sealing material form a splicing interface. A thin film material is placed within this interface. Then, a second glass unit is placed over the first glass unit, forming a vacuum glass structural unit. After pressing the vacuum glass structural unit tightly, the edge-sealing material bonds the first and second glass units together. The thin film material is then removed, and the splicing interface forms an evacuation port. Therefore, there is no need to additionally set evacuation ports or drill holes and install exhaust pipes on the glass surface. The vacuum glass structural unit can be directly vacuumed and then hot-pressed to obtain vacuum glass. This simplifies the preparation process, reduces complex steps and equipment requirements, and improves production efficiency.

[0012] After the vacuum glass structure unit is compressed, the sealing material bonds the first glass and the second glass together, which can effectively maintain the vacuum level formed during the manufacturing process and ensure the sealing and stability of the vacuum glass structure unit.

[0013] The present invention provides a method for preparing vacuum glass, which reduces manufacturing steps and equipment requirements, and optimizes the process flow, thereby lowering the manufacturing cost of vacuum glass and making the product more cost-competitive.

[0014] The vacuum glass preparation method of this invention promotes the consistency and quality stability of vacuum glass structural units, and the setting of sealing materials is more uniform and controllable, which is conducive to the production of high-quality vacuum glass products.

[0015] In summary, the vacuum glass preparation method provided by this invention, through innovative process flow, not only improves production efficiency and product performance, but also potentially reduces manufacturing costs, providing a more feasible and economical solution for the large-scale application and promotion of vacuum glass.

[0016] According to some embodiments of the present invention, the vacuum glass structural unit is subjected to a compression process, and after the compression process, the sealing material is used to bond the first glass and the second glass together. The compression process includes hot pressing of the frame or lamination by a laminated glass laminator.

[0017] According to some embodiments of the present invention, the temperature for hot pressing the frame is 100°C to 140°C, and the hot pressing time is 30 min to 90 min.

[0018] According to some embodiments of the present invention, the vacuum glass structure unit is further provided with a support.

[0019] The support can be a composite material of tin powder and transparent high-temperature glass ink (commercially available, mainly composed of glass powder, hydrophilic environmentally friendly solvents, and organic resins). To ensure the support effect and reduce the risk of tin oxidation and discoloration, the tin doping content is 0.5-3 wt%. It is bonded to the glass by printing, and then the support is sintered and bonded during the glass tempering process.

[0020] According to some embodiments of the present invention, the method for preparing the support includes: printing composite ink onto a glass surface and then drying it.

[0021] According to some embodiments of the present invention, the composite ink comprises tin powder and transparent high-temperature glass ink, wherein the amount of tin powder added to the composite ink is 0.5-3 wt%.

[0022] According to some embodiments of the present invention, the thickness of the support is 0.6-0.8 mm.

[0023] According to some embodiments of the present invention, the thickness of the support is any value of 0.6 mm, 0.7 mm and 0.8 mm or a range formed by any two of them.

[0024] According to some embodiments of the present invention, the diameter of the support is 0.9-1.2 mm.

[0025] According to some embodiments of the present invention, the diameter of the support is any value of 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, or a range of any two of these values.

[0026] According to some embodiments of the present invention, the support is a point support distributed at a spacing of 90-110 mm.

[0027] According to some embodiments of the present invention, the support is any value of 90mm, 95mm, 100mm, 105mm, 110mm or a range of values ​​formed by any two of these.

[0028] According to some embodiments of the present invention, the method for preparing the support may be:

[0029] After cleaning, the flat glass is placed in the printing chamber. The printing process is the same as the existing screen printing method for colored enamel glass. The screen can be made of 0.65-0.76mm thick stainless steel plate with a 1.2-1.6mm round hole spacing of no more than 100mm. After the composite ink is printed onto the glass surface, it is dried at 180-200℃ for 30-300 seconds, depending on the drying conditions of the composite ink.

[0030] After the support structure is in place, the flat glass containing the support is placed in a tempering furnace for tempering. During tempering, the forced convection system should be minimized to prevent excessive convection airflow, which could lead to insufficient heating time and incomplete sintering. The parameters for different tempering furnaces vary depending on the glass substrate thickness. Support sintering requires high radiation, low convection, and long heating time. The support sintering temperature should be reduced by 8-12°C compared to the standard tempering temperature for the substrate glass thickness, convection should be reduced by 55-65%, and heating time extended by 8-10%.

[0031] According to some embodiments of the present invention, the edge sealing material includes at least one of SGP film, EVA film, and tin alloy.

[0032] According to some embodiments of the present invention, the alloy tin is a commercially available product containing 80-83% tin, 1-2% silver, 0.2-0.3% copper, and 3.5-3.8% rosin. The role of the rosin is to prevent the alloy tin sealing strip from cracking.

[0033] According to some embodiments of the present invention, the thickness of the edge sealing material is 0.7 mm to 0.8 mm.

[0034] According to some embodiments of the present invention, the thickness of the edge sealing material is any value of 0.7mm, 0.72mm, 0.74mm, 0.76mm, 0.78mm, 0.8mm, or a range of any two of these values.

[0035] According to some embodiments of the present invention, the width of the edge sealing material is 5mm to 10mm.

[0036] According to some embodiments of the present invention, the width of the edge sealing material is any value of 5mm, 6mm, 7mm, 8mm, 9mm, 10mm or a range formed by any two of these values.

[0037] According to some embodiments of the present invention, the method further includes, in step S2, coating the outer surface of the vacuum glass structure unit.

[0038] In vacuum glass, the outer surface typically refers to the glass surface exposed to the external environment. This is the outer side of the glass, isolated from the indoor environment and in direct contact with the outside air. Specifically, in a standard vacuum glass structure:

[0039] The outer surface refers to the glass side facing the external environment. It is exposed to outdoor climatic conditions such as wind, rain, and ultraviolet radiation.

[0040] The inner surface refers to the glass surface facing the interior space. It faces the indoor environment.

[0041] Vacuum glass is typically designed with a vacuum layer between two panes of glass to provide thermal and sound insulation. The outer surface is usually treated or coated to enhance durability and improve energy efficiency.

[0042] The chamber can be sealed by heat pressing after the gas is removed using a vacuum magnetron sputtering device or a high vacuum negative pressure machine. If a coating is required on the glass surface, a magnetron sputtering vacuum coating production line can be used to coat the outer surface of the glass with a LOW-E film. During this process, the vacuum structure unit achieves a high vacuum state and the coating is completed.

[0043] After coating is completed, before the vacuum level is gradually restored to atmospheric pressure, the sealing position is rapidly hot-pressed. The hot-pressing can be done by contact, at 150-160℃, for 30 seconds to complete the rapid sealing, and then returned to the atmosphere.

[0044] The open vacuum glass structural unit allows for the coating of the glass surface while a vacuum is being created, improving the shading and heat insulation performance of the vacuum glass.

[0045] Once the coating is completed, the vacuum glass can be produced using the conventional methods for producing insulated glass.

[0046] According to some embodiments of the present invention, the included angle between the splicing interface and the adjacent glass edge is 40° to 50°.

[0047] According to some embodiments of the present invention, the film material includes a PET film.

[0048] The film material and the sealing material do not stick together, so the film material can be removed directly, thus forming an open vacuum glass structural unit.

[0049] According to some embodiments of the present invention, the preparation method further includes applying a silane coupling agent adhesion promoter to the four edges of the first glass before setting the sealing material.

[0050] According to some embodiments of the present invention, the method for arranging the sealing material may be as follows: Tempered glass with the support arranged is cleaned and air-dried using deionized water. After cleaning, a hydrolyzed silane coupling agent adhesive accelerator is applied to a 10mm section of the glass frame (or the support is arranged on the tin side of the glass, eliminating this step). After arrangement, the tin side of another piece of tempered glass is placed on top, forming a structural unit of vacuum glass.

[0051] The height of the edge banding material is slightly greater than the thickness of the support.

[0052] A second aspect of the present invention provides a vacuum glass prepared by the method of the first aspect of the present invention.

[0053] One of the technical solutions of the present invention concerning vacuum glass has at least the following beneficial effects:

[0054] The vacuum glass of the present invention forms a splicing interface at the joint of the sealing material. A thin film material is placed in the splicing interface, and the thin film material and the sealing material do not stick together. Therefore, the thin film material can be directly removed, thus forming an open vacuum glass structural unit. There is no need to set an air extraction hole, resulting in low production cost.

[0055] The vacuum glass of this invention allows for surface coating during vacuuming, further improving its shading and heat insulation performance, resulting in a composite glass product with an extremely low heat transfer coefficient. Specifically, the U-value of the glass is reduced to 0.4-0.7 W / m. 2 Below .K, the sound insulation performance of glass is significantly reduced compared to traditional vacuum or vacuum glass, and the processing cost is lower, making rapid promotion possible.

[0056] The vacuum glass of this invention possesses excellent moisture-sealing properties, effectively preventing moisture penetration and thus enhancing its sealing effect. This is crucial for the thermal insulation performance of the vacuum glass. The sealing material exhibits excellent weather resistance, effectively preventing cracking and extending the service life of the vacuum glass. The material also possesses good weather resistance, maintaining its physical and chemical properties for extended periods, and is not easily affected by external environmental factors, ensuring the stable performance of the vacuum glass during long-term use. Attached Figure Description

[0057] Figure 1 This is a schematic diagram of the supporting structure and distribution.

[0058] Figure 2 This is a schematic diagram of a vacuum glass structure.

[0059] Figure 3 This is a top view of the splicing interface structure of Embodiment 1 and Embodiment 3.

[0060] Figure 4 This is a top view of the splicing interface structure, as shown in Scale 1. Detailed Implementation

[0061] The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described in conjunction with the embodiments, but the present invention is not limited to these embodiments.

[0062] In a first aspect, some embodiments of the present invention provide a method for preparing vacuum glass, comprising the following steps:

[0063] S1: An edge sealing material is set around the four edges of the first glass, and the joints of the edge sealing material form a splicing interface. A thin film material is placed in the splicing interface.

[0064] S2: Cover the first glass with the second glass, and the second glass and the first glass form a vacuum glass structure unit. After the vacuum glass structure unit is pressed tightly, the sealing material is used to bond the first glass and the second glass. The film material is removed, the splicing interface forms an air extraction hole, and the vacuum glass structure unit is evacuated and then heat-sealed.

[0065] It should be noted that the method for preparing vacuum glass in this invention involves first setting an edge-sealing material around the four edges of the first glass, with the ends of the edge-sealing material forming a splicing interface. A thin film material is then placed in the splicing interface, and a second glass is placed on top of the first glass. The second glass and the first glass form a vacuum glass structural unit. After the vacuum glass structural unit is pressed tightly, the edge-sealing material bonds the first and second glass together. The thin film material is then removed, and the splicing interface forms an air extraction hole. Thus, there is no need to set an additional air extraction hole, nor is it necessary to drill holes and arrange exhaust pipes on the glass surface. The vacuum glass structural unit can be directly vacuumed and then hot-pressed to obtain vacuum glass. This simplifies the preparation process, reduces complex steps and equipment requirements in the manufacturing process, and improves production efficiency.

[0066] After the vacuum glass structure unit is compressed, the sealing material bonds the first and second glass, which can effectively maintain the vacuum level formed during the manufacturing process and ensure the sealing and stability of the vacuum glass structure unit.

[0067] The present invention provides a method for preparing vacuum glass, which reduces manufacturing steps and equipment requirements, and optimizes the process flow, thereby lowering the manufacturing cost of vacuum glass and making the product more cost-competitive.

[0068] The vacuum glass preparation method of this invention promotes the consistency and quality stability of vacuum glass structural units, and the setting of sealing materials is more uniform and controllable, which is conducive to the production of high-quality vacuum glass products.

[0069] In summary, the vacuum glass preparation method provided by this invention, through innovative process flow, not only improves production efficiency and product performance, but also potentially reduces manufacturing costs, providing a more feasible and economical solution for the large-scale application and promotion of vacuum glass.

[0070] In conjunction with the first aspect, in some embodiments of the present invention, the vacuum glass structural unit is subjected to a compaction process, and after the compaction process, the sealing material is used to bond the first glass and the second glass together. The compaction process includes hot pressing of the frame or lamination by a laminated glass laminator.

[0071] In conjunction with the first aspect, in some embodiments of the present invention, the frame hot-pressing temperature is 100°C to 140°C, and the hot-pressing time is 30 min to 90 min.

[0072] In conjunction with the first aspect, in some embodiments of the present invention, a support is also provided in the vacuum glass structural unit.

[0073] The support can be a composite material of tin powder and transparent high-temperature glass ink (commercially available, mainly composed of glass powder, hydrophilic environmentally friendly solvents, and organic resins). To ensure the support effect and reduce the risk of tin oxidation and discoloration, the tin doping content is 0.5-3 wt%. It is bonded to the glass by printing, and then the support is sintered and bonded during the glass tempering process.

[0074] refer to Figure 1 As shown, support points can be arranged on the surface of a clean and air-dried first glass substrate by screen printing. Different screen thicknesses and mesh counts can be selected according to the required height of the support points. In order to form a larger cavity, a metal screen, such as a stainless steel screen, is preferred. After printing, the glass is tempered to solidify the support points.

[0075] Cut the ring-shaped adhesive sheet, and place the edge sealing material with low water vapor permeability around the glass. According to the glass processing size, there should be one or more breaks with a width of less than 0.2mm on the ring-shaped adhesive sheet as vents. The vents are preferably inclined.

[0076] Then, the second glass substrate is placed on the first glass substrate, and the sealing strip is initially bonded between the two glass pieces by hot pressing at 100-140℃. In order to achieve the initial bonding, PET is used as a sealing partition and hot pressing is performed.

[0077] The preform is evacuated in a vacuum chamber, which can be a vacuum magnetron sputtering coating chamber, and the vacuum level is maintained at 3-8 × 10⁻⁶. -3 mbar can simultaneously achieve glass surface coating and glass cavity vacuuming;

[0078] Before exiting the vacuum chamber, the PET-removed seal is heated to 150-160℃ to melt the adhesive sheet and seal the vent.

[0079] In conjunction with the first aspect, in some embodiments of the present invention, the method for preparing the support includes: printing composite ink onto a glass surface and then drying it.

[0080] In conjunction with the first aspect, in some embodiments of the present invention, the composite ink comprises tin powder and transparent high-temperature glass ink, wherein the amount of tin powder added to the composite ink is 0.5-3 wt%.

[0081] In conjunction with the first aspect, in some embodiments of the present invention, the thickness of the support is 0.6-0.8 mm.

[0082] In conjunction with the first aspect, in some embodiments of the invention, the thickness of the support is any value of 0.6 mm, 0.7 mm, and 0.8 mm, or a range formed by any two of them.

[0083] In conjunction with the first aspect, in some embodiments of the present invention, the diameter of the support is 0.9-1.2 mm.

[0084] In conjunction with the first aspect, in some embodiments of the present invention, the diameter of the support is any value of 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, or a range formed by any two of these values.

[0085] In conjunction with the first aspect, in some embodiments of the present invention, the support is a point support distributed at a spacing of 90-110 mm.

[0086] In conjunction with the first aspect, in some embodiments of the present invention, the support is any value of 90mm, 95mm, 100mm, 105mm, 110mm or a range of values ​​formed by any two of these spacings.

[0087] In conjunction with the first aspect, in some embodiments of the present invention, the method for preparing the support may be:

[0088] After cleaning, the flat glass is placed in the printing chamber. The printing process is the same as the existing screen printing method for colored enamel glass. The screen can be made of 0.65-0.76mm thick stainless steel plate with a 1.2-1.6mm round hole spacing of no more than 100mm. After the composite ink is printed onto the glass surface, it is dried at 180-200℃ for 30-300 seconds, depending on the drying conditions of the composite ink.

[0089] After the support structure is in place, the flat glass containing the support is placed in a tempering furnace for tempering. During tempering, the forced convection system should be minimized to prevent excessive convection airflow, which could lead to insufficient heating time and incomplete sintering. The parameters for different tempering furnaces vary depending on the glass substrate thickness. Support sintering requires high radiation, low convection, and long heating time. The support sintering temperature should be reduced by 8-12°C compared to the standard tempering temperature for the substrate glass thickness, convection should be reduced by 55-65%, and heating time extended by 8-10%.

[0090] In conjunction with the first aspect, in some embodiments of the present invention, the edge sealing material includes at least one of SGP film, EVA film, and tin alloy.

[0091] In conjunction with the first aspect, in some embodiments of the present invention, the alloy tin is a commercially available product containing 80-83% tin, 1-2% silver, 0.2-0.3% copper, and 3.5-3.8% rosin. The role of the rosin is to prevent the alloy tin sealing strip from cracking.

[0092] In conjunction with the first aspect, in some embodiments of the present invention, the thickness of the edge sealing material is 0.7 mm to 0.8 mm.

[0093] In conjunction with the first aspect, in some embodiments of the present invention, the thickness of the edge sealing material is any value of 0.7 mm, 0.72 mm, 0.74 mm, 0.76 mm, 0.78 mm, 0.8 mm, or a range formed by any two of these values.

[0094] In conjunction with the first aspect, in some embodiments of the present invention, the width of the edge sealing material is 5mm to 10mm.

[0095] In conjunction with the first aspect, in some embodiments of the present invention, the width of the edge sealing material is any value of 5mm, 6mm, 7mm, 8mm, 9mm, 10mm or a range formed by any two of these values.

[0096] In conjunction with the first aspect, in some embodiments of the present invention, the method further includes, in step S2, coating the outer surface of the vacuum glass structural unit.

[0097] In vacuum glass, the outer surface typically refers to the glass surface exposed to the external environment. This is the outer side of the glass, isolated from the indoor environment and in direct contact with the outside air. Specifically, in a standard vacuum glass structure:

[0098] It should be noted that the outer surface refers to the glass side facing the external environment. It is exposed to outdoor climatic conditions such as wind, rain, and ultraviolet radiation.

[0099] The inner surface refers to the glass surface facing the interior space. It faces the indoor environment.

[0100] Vacuum glass is typically designed with a vacuum layer between two panes of glass to provide thermal and sound insulation. The outer surface is usually treated or coated to enhance durability and improve energy efficiency.

[0101] The chamber can be sealed by heat pressing after the gas is removed using a vacuum magnetron sputtering device or a high vacuum negative pressure machine. If a coating is required on the glass surface, a magnetron sputtering vacuum coating production line can be used to coat the outer surface of the glass with a LOW-E film. During this process, the vacuum structure unit achieves a high vacuum state and the coating is completed.

[0102] After coating is completed, before the vacuum level is gradually restored to atmospheric pressure, the sealing position is rapidly hot-pressed. The hot-pressing can be done by contact, at 150-160℃, for 30 seconds to complete the rapid sealing, and then returned to the atmosphere.

[0103] The open vacuum glass structural unit allows for the coating of the glass surface while a vacuum is being created, improving the shading and heat insulation performance of the vacuum glass.

[0104] Once the coating is completed, the vacuum glass can be produced using the conventional methods for producing insulated glass.

[0105] In conjunction with the first aspect, in some embodiments of the present invention, the included angle between the splicing interface and the adjacent glass edge is 40° to 50°.

[0106] The angle between the joint and the adjacent glass edge is 40°–50°. This results in longer sealing material on both sides of the joint and a larger contact area, which helps to seal the joint more effectively, forming a more robust seal and reducing the possibility of gas leakage, thus better maintaining the vacuum level inside the vacuum glass. A suitable angle ensures that the sealing material is evenly distributed and cured during the heat-sealing process, thereby improving the overall strength and stability of the seal and avoiding potential defects caused by uneven sealing.

[0107] Therefore, the 40° to 50° angle design optimizes the sealing and stability of the splicing interface, while simplifying the manufacturing process and improving the overall performance and production efficiency of vacuum glass.

[0108] In conjunction with the first aspect, in some embodiments of the present invention, the film material includes a PET film.

[0109] The film material and the sealing material do not stick together, so the film material can be removed directly, thus forming an open vacuum glass structural unit.

[0110] PET film does not adhere to the sealing material, allowing for easy removal after vacuuming, resulting in clear vent holes and simplifying the vacuum glass manufacturing process. PET film possesses excellent isolation properties, effectively preventing interference from sealing materials and other materials during manufacturing. PET film is chemically stable and does not readily react with other materials, ensuring purity and stability during manufacturing. PET film has high mechanical strength and a certain degree of heat resistance, maintaining structural stability during manufacturing and preventing deformation or breakage at high temperatures. PET film can be cut and shaped without generating large amounts of gas at high temperatures, thus minimizing its impact on vacuum levels. PET film is relatively economical, facilitating large-scale production and reducing manufacturing costs. These characteristics make PET film an ideal thin-film material for vacuum glass manufacturing, contributing to improved production efficiency and product quality.

[0111] In conjunction with the first aspect, in some embodiments of the present invention, the preparation method further includes applying a silane coupling agent adhesion promoter to the four edges of the first glass before setting the sealing material.

[0112] Silane coupling agents enhance the adhesion between the sealing material and the first glass layer, ensuring a strong bond between them and improving the overall structural stability. They also improve the adhesion between the sealing material and the glass surface, reducing the risk of delamination or peeling and ensuring the sealing performance of the vacuum glass during production and use. Through the action of an accelerator, the bond between the glass and the sealing material becomes more durable, increasing the service life of the vacuum glass and reducing performance degradation caused by interface failure. Furthermore, silane coupling agents help improve interfacial weather resistance, making the vacuum glass more adaptable to environmental changes during long-term use and maintaining excellent performance. Therefore, using silane coupling agents ensures the consistency and quality stability of each vacuum glass unit during manufacturing, optimizes the production process, and improves production efficiency.

[0113] In conjunction with the first aspect, in some embodiments of the present invention, the method for arranging the sealing material may be as follows: Tempered glass with the support arranged is cleaned and air-dried using deionized water. After cleaning, a hydrolyzed silane coupling agent adhesive accelerator is applied to a 10mm section of the glass frame (or the support is arranged on the tin side of the glass, eliminating this step). After arrangement, the tin side of another piece of tempered glass is placed on top, forming a vacuum glass structural unit.

[0114] The height of the edge banding material is slightly greater than the thickness of the support.

[0115] A higher edge sealing material can completely cover the thickness of the support, ensuring a tight seal between the edge sealing area and the support, effectively preventing gas leakage and maintaining the vacuum level of the vacuum glass. A slightly higher edge sealing material also provides better support and protection, enhancing the overall stability and structural integrity of the vacuum glass and reducing deformation or breakage caused by pressure or external forces. In actual production, the thickness of the support may have certain tolerances; a slightly higher edge sealing material can effectively compensate for these tolerances, ensuring the consistency and quality stability of the final product. A higher edge sealing material can better adhere to the glass surface during hot pressing, providing more uniform contact pressure, thereby improving the adhesion and sealing performance of the edge sealing material. During hot pressing and vacuuming, a higher edge sealing material can better cope with potential material flow and shrinkage, reducing manufacturing defects caused by insufficient material.

[0116] In a second aspect, some embodiments of the present invention provide a vacuum glass prepared by the method of the first aspect of the present invention.

[0117] It is understood that in the vacuum glass of the present invention, since the end of the sealing material forms a splicing interface, a thin film material is placed in the splicing interface. The thin film material and the sealing material will not stick together, so the thin film material can be directly removed. At this time, an open vacuum glass structural unit is formed, which does not require the setting of an air extraction hole, resulting in low production cost.

[0118] The vacuum glass of this invention allows for surface coating during vacuuming, further improving its shading and heat insulation performance, resulting in a composite glass product with an extremely low heat transfer coefficient. Specifically, the U-value of the glass is reduced to 0.4-0.7 W / m. 2 Below .K, the sound insulation performance of glass is significantly reduced compared to traditional vacuum or vacuum glass, and the processing cost is lower, making rapid promotion possible.

[0119] The vacuum glass of this invention possesses excellent moisture-sealing properties, effectively preventing moisture penetration and thus enhancing its sealing effect. This is crucial for the thermal insulation performance of the vacuum glass. The sealing material exhibits excellent weather resistance, effectively preventing cracking and extending the service life of the vacuum glass. The material also possesses good weather resistance, maintaining its physical and chemical properties for extended periods, and is not easily affected by external environmental factors, ensuring the stable performance of the vacuum glass during long-term use.

[0120] The vacuum glass of this invention is energy-saving glass, and its structure is referenced. Figure 2 As shown, Figure 2 In the diagram, 100 represents the vacuum glass sealing material; 200 represents the hollow double-sealing system; 300 represents the vacuum layer; 400 represents the hollow layer; 500 represents the low-e layer; 600 represents the support structure; and 700 represents the tempered glass carrier.

[0121] The vacuum glass of this invention comprises at least one piece of vacuum glass. The surface of this vacuum glass does not require an air extraction hole. While vacuuming, a coating can be applied to the glass surface, further improving the product's shading and heat insulation performance. When applying a low-emissivity silver-containing film to the surface, it needs to be further verified as insulated glass to prevent silver oxidation, resulting in a composite glass product with an extremely low heat transfer coefficient.

[0122] The following will describe the concept and technical effects of the present invention clearly and completely with reference to embodiments, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention.

[0123] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0124] Unless otherwise specified, "room temperature" in this invention means 25℃±5℃.

[0125] Unless otherwise specified, "about" in this invention means that the allowable error is within ±2%.

[0126] Unless otherwise specified in the examples, the procedures should be performed under standard conditions or conditions recommended by the manufacturer. Reagents or instruments whose manufacturers are not specified are all commercially available products.

[0127] Example 1

[0128] A vacuum glass was prepared by first setting an edge-sealing material around the perimeter of a first glass unit, with the ends of the edge-sealing material forming a splicing interface. A thin film material was then placed in the splicing interface. Next, a second glass unit was placed on top of the first glass unit, forming a vacuum glass structural unit. After pressing the vacuum glass structural unit tightly, the edge-sealing material bonded the first and second glass units together. The thin film material was then removed, leaving a vacuum vent at the splicing interface. Finally, the vacuum glass structural unit was evacuated and then heat-sealed. The specific steps are as follows:

[0129] (1) Arrangement of supports: After cleaning and drying a glass substrate with dimensions of 1m × 1m and a thickness of 6mm, support points were printed using a 0.7mm thick stainless steel screen. The screen had circular holes with a diameter of 1.2mm and a horizontal and vertical spacing of 100mm. A transparent high-temperature glass ink containing 1wt% tin powder was printed onto the glass surface and then dried at 200℃ for 90s at a speed of 3m / min. This resulted in a distribution of point supports on the glass with a thickness of 0.7mm, a diameter of 1mm, and a spacing of 100mm.

[0130] (2) Sintering of the support and tempering of the substrate: Different tempering furnaces use different temperature settings. The sintering temperature of the support is set according to the normal 6mm glass tempering process parameters, with the temperature reduced by 8-12℃, convection reduced by 55-65%, and heating time extended by 8-10%.

[0131] (3) Vacuum sealing material arrangement: Apply silane coupling agent adhesion promoter 10mm away from the glass frame, then attach a 7mm wide and 0.76mm thick EVA strip to the coupling agent. The joints of the EVA strips form a splicing interface, and the angle between the splicing interface and the adjacent glass edge is 45°. (Refer to...) Figure 3 As shown, insert the PET strip into the break point;

[0132] (4) Forming a vacuum glass structural unit. Cover the side with the support printed on it with another 6mm glass, perform frame hot pressing at 120℃ for 60min, and remove the PET strip directly after hot pressing. At this time, an open vacuum glass structural unit is formed. The corners can be heated by hot air to remove the wrinkles at the corners.

[0133] (5) Vacuum glass preparation: The pre-fabricated vacuum glass structural unit is placed in a vacuum magnetron sputtering apparatus, and the vacuum level of the apparatus is maintained at 3-8×10⁻⁶. -3 After the coating is completed, a hot pressing device is added to the end of the coating chamber. After hot pressing at 150°C, the EVA film softens and bonds to form vacuum coated glass.

[0134] (6) Insulating glass preparation: The pre-made vacuum coated glass structure and 6mm clear glass are prepared into an insulating structure according to the conventional insulating glass processing parameters.

[0135] Depending on the coating type, the heat transfer coefficient and optical properties of vacuum glass can be adjusted. A typical 6mm hollow triple-silver structure has a heat transfer coefficient of approximately 1.6 W / m². 2 At 0.4 K, the heat transfer coefficient of insulated glass with a vacuum structure can be reduced to 0.4 W / m. 2 .K, which greatly improves the thermal insulation performance of insulated glass.

[0136] Example 2

[0137] A vacuum glass was prepared by first setting an edge-sealing material around the perimeter of a first glass unit, with the ends of the edge-sealing material forming a splicing interface. A thin film material was then placed in the splicing interface. Next, a second glass unit was placed on top of the first glass unit, forming a vacuum glass structural unit. After pressing the vacuum glass structural unit tightly, the edge-sealing material bonded the first and second glass units together. The thin film material was then removed, leaving a vacuum vent at the splicing interface. Finally, the vacuum glass structural unit was evacuated and then heat-sealed. The specific steps are as follows:

[0138] (1) Arrangement of supports: After cleaning and drying a glass substrate with dimensions of 1m × 1m and a thickness of 6mm, support points were printed using a 0.7mm thick stainless steel screen. The screen had circular holes with a diameter of 1.2mm and a horizontal and vertical spacing of 100mm. A transparent high-temperature glass ink containing 1wt% tin powder was printed onto the glass surface and then dried at 200℃ for 90s at a speed of 3m / min. This resulted in a distribution of point supports on the glass with a thickness of 0.7mm, a diameter of 1mm, and a spacing of 100mm.

[0139] (2) Sintering of the support and tempering of the substrate: Different tempering furnaces use different temperature settings. The sintering temperature of the support is set according to the normal 6mm glass tempering process parameters, with the temperature reduced by 8-12℃, convection reduced by 55-65%, and heating time extended by 8-10%.

[0140] (3) Vacuum sealing material arrangement: Mix tin alloy (80% tin, 2% silver, 0.2% copper, 3.5% rosin, 2.3% activator, 7% solvent, 5% thixotropic agent), and apply the mixture 10mm from the glass frame, with a thickness of 0.7mm and a width of approximately 8mm. The joints of the sealing material form a splicing interface, with an angle of 45° between the splicing interface and the adjacent glass edge. After coating, insert a 0.1mm thick PET film obliquely into the tin alloy along the direction of the tin alloy. (Refer to...) Figure 3 As shown;

[0141] (4) Forming a vacuum glass structural unit. Cover the side with the support printed on it with another 6mm glass, perform frame hot pressing at 120℃ for 60min, and remove the PET strip directly after hot pressing. At this time, an open vacuum glass structural unit is formed. The corners can be heated by hot air to remove the wrinkles at the corners.

[0142] (5) Vacuum glass preparation: The pre-fabricated vacuum glass structural unit is placed in a vacuum magnetron sputtering apparatus, and the vacuum level of the apparatus is maintained at 3-8×10⁻⁶. -3After the coating is completed, a hot pressing device is added to the end of the coating chamber. After hot pressing at 150°C, the EVA film softens and bonds to form vacuum coated glass.

[0143] (6) Insulating glass preparation: The pre-made vacuum coated glass structure and 6mm clear glass are prepared into an insulating structure according to the conventional insulating glass processing parameters.

[0144] Depending on the coating type, the heat transfer coefficient and optical properties of vacuum glass can be adjusted. A typical 6mm hollow triple-silver structure has a heat transfer coefficient of approximately 1.6 W / m². 2 At 0.4 K, the heat transfer coefficient of insulated glass with a vacuum structure can be reduced to 0.4 W / m. 2 .K, which greatly improves the thermal insulation performance of insulated glass.

[0145] Comparative Example 1

[0146] The difference from Example 1 is that the joint where the EVA strips meet forms a splicing interface, and the angle between the splicing interface and the adjacent glass edge is 90°. (Refer to...) Figure 4 As shown.

[0147] The angle between the splice joint and the adjacent glass edge is 90°, resulting in a small contact area between the beginning and end of the sealing material at the splice joint. This makes it impossible to effectively seal the joint, increasing the risk of gas leakage and affecting the stability of the vacuum level.

[0148] Furthermore, a small contact area at the joint of the sealing material may prevent it from being evenly distributed and cured during hot pressing, resulting in insufficient sealing strength and affecting the overall structural stability of the vacuum glass. A small contact area also easily leads to stress concentration at the joint, increasing the risk of glass breakage or damage, especially under temperature changes or mechanical stress.

[0149] Therefore, when the angle between the splice joint and the adjacent glass edge is 40-50°, the sealing material at the splice joint has a large contact area at both ends, which helps to improve the sealing effect, enhance the structural strength, simplify the production process, and ensure the long-term stability and reliability of vacuum glass.

[0150] The present invention has been described in detail above with reference to the embodiments. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

[0151] The present invention has been described in detail above with reference to the embodiments. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A method for preparing vacuum glass, characterized in that, Includes the following steps: S1: An edge sealing material is provided around the four edges of the first glass. The edge sealing material includes at least one of SGP film, EVA film and tin alloy. The joints of the edge sealing material form a splicing interface. The angle between the splicing interface and the adjacent glass edge is 40°~50°. A film material, which is PET film, is placed in the splicing interface. S2: Cover the first glass with the second glass, the second glass and the first glass form a vacuum glass structure unit. After the vacuum glass structure unit is pressed tightly, the sealing material bonds the first glass and the second glass. Take out the film material. The splicing interface forms a vacuum hole. After vacuuming the vacuum glass structure unit, heat press and seal it. At the same time as vacuuming, a film is coated on the glass surface. The pressing process is a frame hot pressing method, wherein the frame hot pressing temperature is 100~140℃, the hot pressing time is 30min~90min, and the hot pressing sealing temperature is 150-160℃.

2. The preparation method according to claim 1, characterized in that, The vacuum glass structure unit is also equipped with a support.

3. The preparation method according to claim 2, characterized in that, The method for preparing the support includes: printing composite ink onto the glass surface and then drying it.

4. The preparation method according to claim 3, characterized in that, The composite ink comprises tin powder and transparent high-temperature glass ink, wherein the amount of tin powder added to the composite ink is 0.5-3 wt%.

5. The preparation method according to claim 2, characterized in that, The thickness of the support is 0.6-0.8 mm.

6. The preparation method according to claim 2, characterized in that, The diameter of the support is 0.9-1.2 mm.

7. The preparation method according to claim 2, characterized in that, The support is a point support distributed at a spacing of 90-110mm.

8. The preparation method according to any one of claims 1 to 7, characterized in that, The preparation method further includes applying a silane coupling agent adhesion promoter to the four edges of the first glass before setting the sealing material.

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