Preparation method of vacuum glass and vacuum glass

Abstract

The invention provides a preparation method of vacuum glass and the vacuum glass. According to the preparation method disclosed by the invention, the surface of the glass does not need to be drilled and an exhaust pipe does not need to be arranged, and the vacuum glass structure unit can be directly vacuumized and then subjected to hot-press sealing, so that the vacuum glass is prepared, the preparation process is simplified, complex steps and equipment requirements in the manufacturing process are reduced, and the production efficiency is improved. The invention also provides the vacuum glass.

Description

Technical Field

[0001] The invention belongs to the technical field of vacuum glass, and in particular relates to a method for preparing vacuum glass and the vacuum glass. Background Art

[0002] Vacuum glass has attracted more and more attention due to its excellent sound insulation and heat insulation performance. Compared with hollow glass, vacuum glass can achieve the same sound insulation and heat insulation effect with a smaller thickness, so it is considered to be a more advantageous building material. At present, the mainstream vacuum glass manufacturing method at home and abroad mainly includes arranging high-strength supports on the surface of the glass, and evenly coating low-temperature glass powder around it, and then putting it into a furnace for sintering and vacuuming. Although this process is effective, there are some significant problems.

[0003] First, this method requires drilling holes on the glass surface and arranging exhaust pipes to extract internal gases. After the vacuum is evacuated, sealing is required, which makes the entire processing process complicated and cumbersome. Secondly, the thermal insulation performance of vacuum glass depends to a large extent on the radiation characteristics of the glass surface, so whether Low-E glass is used and the difference in its surface emissivity will significantly affect its thermal insulation effect. This requires that the glass surface be coated before the vacuum glass is prepared to optimize its performance. Third, there are some problems with the low-temperature glass powder coating technology used in the current method. The coating uniformity of the low-temperature glass powder and the performance stability during the sintering process are difficult to guarantee, which may lead to poor sealing of the vacuum cavity, thereby affecting the vacuum degree and long-term stability of the glass. The thickness of the vacuum cavity also limits the improvement of its sound insulation effect, resulting in certain restrictions on the application of vacuum glass in the market.

[0004] Therefore, in order to overcome these problems, a new method for preparing vacuum glass needs to be developed. Summary of the invention

[0005] The present invention aims to solve at least one of the above-mentioned technical problems existing in the prior art. To this end, the present invention provides a method for preparing vacuum glass, which method does not require additional exhaust holes, does not require drilling holes on the glass surface and arranging exhaust pipes, and can directly evacuate the vacuum glass structure unit and then heat-press and seal it, thereby preparing vacuum glass, simplifying the preparation process, reducing the complex steps and equipment requirements in the manufacturing process, and improving production efficiency.

[0006] The 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: Setting edge sealing materials around the four edges of the first glass, where the end and end of the edge sealing materials are connected to form a joint, and placing a film material in the joint;

[0009] S2: Cover the first glass with a second glass, the second glass and the first glass form a vacuum glass structure unit, press the vacuum glass structure unit tightly, bond the first glass and the second glass with the edge sealing material, take out the film material, form an exhaust hole at the joint, evacuate the vacuum glass structure unit and seal it by hot pressing.

[0010] A technical solution in the method for preparing vacuum glass of the present invention has at least the following beneficial effects:

[0011] The method for preparing vacuum glass of the present invention comprises the following steps: firstly, edge sealing materials are arranged around the edges of a first glass, a joint is formed at the joints of the end and end of the edge sealing materials, a film material is placed in the joint, and then a second glass is covered on top of the first glass, the second glass and the first glass form a vacuum glass structural unit, and after the vacuum glass structural unit is pressed tightly, the edge sealing materials are used to bond the first glass and the second glass, the film material is taken out, and an exhaust hole is formed at the joint, thereby, there is no need to additionally arrange an exhaust hole, there is no need to drill holes on the glass surface and arrange an exhaust pipe, the vacuum glass structural unit can be directly vacuumed and then hot-pressed and sealed, thereby preparing vacuum glass, simplifying the preparation process, reducing the complex steps and equipment requirements in the manufacturing process, and improving production efficiency.

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

[0013] The method for preparing the vacuum glass of the present invention reduces the manufacturing cost of the vacuum glass by reducing the manufacturing steps and equipment requirements and optimizing the process flow, thereby making the product more cost-competitive.

[0014] The method for preparing the vacuum glass of the present invention promotes the consistency and quality stability of the vacuum glass structural unit, and the setting of the edge sealing material is more uniform and controllable, which is conducive to the production of high-quality vacuum glass products.

[0015] In summary, the method for preparing vacuum glass provided by the present invention, through an innovative process flow, not only improves production efficiency and product performance, but also may reduce 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 structure unit is pressed, and after the pressing, the sealing material bonds the first glass to the second glass. The pressing method includes hot pressing of the frame or lamination by a laminated glass laminator.

[0017] According to some embodiments of the present invention, the frame is hot-pressed at a temperature of 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, a support is further provided in the vacuum glass structure unit.

[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 solvent and organic resin). To ensure the support effect and reduce the risk of tin oxidation discoloration, the tin doping content is 0.5-3wt%. It is bonded to the glass by printing, and then the support is sintered and bonded during the tempering process of the glass.

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

[0021] According to some embodiments of the present invention, the components of the composite ink include tin powder and transparent high-temperature glass ink, and the tin powder is added to the composite ink in an amount of 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 one value among 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 one of 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, or a range formed by any two of them.

[0026] According to some embodiments of the present invention, the supports are point supports distributed at intervals of 90-110 mm.

[0027] According to some embodiments of the present invention, the supports have a spacing of any one of 90 mm, 95 mm, 100 mm, 105 mm, and 110 mm, or a range formed by any two of the spacings.

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

[0029] After cleaning, the flat glass is put into the printing room. The printing is consistent with the existing glazed glass screen printing method. 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 on the glass surface, it is dried in an environment of 180-200℃. The drying time can range from 30s to 300s, depending on the drying condition of the composite ink.

[0030] After arranging the supports, put the flat glass containing the supports into the tempering furnace for tempering. During the tempering process, the forced convection system is preferably reduced to avoid too much convection wind, which will lead to short overall heating time and incomplete sintering. The parameters of glass substrates of different thicknesses in different tempering furnaces are inconsistent. The sintering of supports requires high radiation, low convection, and long process parameters. The sintering temperature of the supports is reduced by 8-12°C according to the conventional tempering temperature of the substrate glass thickness, the convection needs to be reduced by 55-65%, and the heating time is 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 alloy tin.

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

[0033] According to some embodiments of the present invention, the edge sealing material has a thickness of 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 among 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 the values.

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

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

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

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

[0039] The exterior surface refers to the glass surface facing the external environment. It is exposed to outdoor weather conditions such as wind, rain and UV rays.

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

[0041] Vacuum glazing designs typically include a vacuum layer between two sheets of glass to provide thermal and acoustic insulation. The exterior surface is often specially treated or coated to enhance durability and improve energy efficiency.

[0042] The vacuum magnetron sputtering equipment or high vacuum negative pressure machine can be used to evacuate the gas in the chamber and then perform hot pressing and sealing. If you need to coat the glass surface, you can use the magnetron sputtering vacuum coating production line to coat the outer surface of the glass with a LOW-E film. During this process, the vacuum structure unit obtains a high vacuum state and completes the coating.

[0043] After the coating is completed, before the vacuum degree is gradually restored to the atmosphere, the sealing position is quickly hot-pressed. The hot pressing can be contact-type, 150-160°C, 30s to complete the rapid sealing, and then return to the atmosphere.

[0044] The open vacuum glass structural unit can coat the glass surface while evacuating the vacuum, thereby improving the sunshade effect and heat insulation performance of the vacuum glass.

[0045] After the coating is completed, the vacuum glass can be produced according to the conventional insulating glass production method.

[0046] According to some embodiments of the present invention, an angle formed between the joint and an adjacent glass edge is 40° to 50°.

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

[0048] The film material and the edge sealing material will not stick together, so the film material can be taken out directly, and an open vacuum glass structural unit is formed.

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

[0050] According to some embodiments of the present invention, the arrangement method of the sealing material can be: the tempered glass with the support arranged is washed and air-dried, and the washing water is deionized water. After the washing is completed, the hydrolyzed silane coupling agent adhesion promoter is applied to the 10mm of the glass frame (or the support is arranged on the tin surface of the glass, this step can be eliminated). After the arrangement is completed, the tin surface of another piece of tempered glass is covered on it to form a structural unit of the vacuum glass.

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

[0052] The 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 regarding vacuum glass has at least the following beneficial effects:

[0054] The vacuum glass of the present invention has a joint interface formed at the end where the edge sealing material is connected. When a film material is placed in the joint interface, the film material and the edge sealing material will not stick to each other, so the film material can be directly taken out. At this time, an open vacuum glass structural unit is formed, and there is no need to set an exhaust hole, so the production cost is low.

[0055] The vacuum glass of the present invention can be coated on the glass surface while evacuating, further improving the sunshade effect and heat insulation performance of the vacuum glass, and obtaining a composite glass product with an extremely low heat transfer coefficient. Specifically, the U value of the glass is reduced to 0.4-0.7W / m 2 .K or below, the sound insulation performance of glass is significantly reduced compared to traditional vacuum or vacuum, and the processing cost is reduced, making rapid promotion possible.

[0056] The vacuum glass of the present invention has good water vapor sealing performance, which can effectively prevent the penetration of water vapor, thereby improving the sealing effect of the vacuum glass. This is crucial for the thermal insulation and heat insulation performance of the vacuum glass. The edge sealing material has excellent weather resistance and can effectively prevent cracking, thereby extending the service life of the vacuum glass. The material has good weather resistance, can maintain its physical and chemical properties for a long time, is not easily affected by the external environment, and ensures the stable performance of the vacuum glass during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a schematic diagram of the support structure and distribution.

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

[0059] Figure 3 It is a top view of the joint structure of Example 1 and Example 3.

[0060] Figure 4 This is a top view of the joint structure of Example 1. DETAILED DESCRIPTION

[0061] The following are specific embodiments of the present invention, and the technical solutions of the present invention are 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 arranged around the edges of the first glass, where the ends of the edge sealing material are connected to form a joint, and a film material is placed in the joint;

[0064] S2: Cover the second glass on the first glass, the second glass and the first glass form a vacuum glass structural unit, press the vacuum glass structural unit tightly, bond the first glass and the second glass with edge sealing materials, remove the film material, form an exhaust hole at the joint, evacuate the vacuum glass structural unit and seal it by hot pressing.

[0065] It should be noted that the preparation method of the vacuum glass of the present invention is to first set the edge sealing material around the edges of the first glass, the end-to-end joint of the edge sealing material forms a joint, put the film material in the joint, and then cover the second glass on the 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, the edge sealing material bonds the first glass and the second glass, the film material is taken out, and the joint forms an exhaust hole, thus, there is no need to set up an additional exhaust hole, there is no need to drill holes on the glass surface and arrange an exhaust pipe, the vacuum glass structural unit can be directly evacuated and then hot-pressed and sealed, thereby obtaining vacuum glass, simplifying the preparation process, reducing the complex steps and equipment requirements in the manufacturing process, and improving production efficiency.

[0066] After the vacuum glass structural unit is pressed tightly, the edge sealing material bonds the first glass and the second glass, which can effectively maintain the vacuum degree formed during the manufacturing process and ensure the sealing and stability of the vacuum glass structural unit.

[0067] The method for preparing the vacuum glass of the present invention reduces the manufacturing cost of the vacuum glass by reducing the manufacturing steps and equipment requirements and optimizing the process flow, thereby making the product more cost-competitive.

[0068] The method for preparing the vacuum glass of the present invention promotes the consistency and quality stability of the vacuum glass structural unit, and the setting of the edge sealing material is more uniform and controllable, which is conducive to the production of high-quality vacuum glass products.

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

[0070] In combination with the first aspect, in some embodiments of the present invention, the vacuum glass structure unit is pressed, and after the pressing, the sealing material bonds the first glass and the second glass. The pressing method includes hot pressing of the frame or lamination through a laminated glass laminator.

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

[0072] In combination with the first aspect, in some embodiments of the present invention, a support is further provided in the vacuum glass structure 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 solvent and organic resin). To ensure the support effect and reduce the risk of tin oxidation discoloration, the tin doping content is 0.5-3wt%. It is bonded to the glass by printing, and then the support is sintered and bonded during the tempering process of the glass.

[0074] refer to Figure 1 As shown, the support points can be arranged on the surface of a cleaned 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 achieve support point solidification.

[0075] Cut the annular adhesive sheet, and preferably place the edge sealing material with low water vapor permeability around the glass. According to the processing size of the glass, there is one or more fractures with a width of less than 0.2mm on the annular adhesive sheet as exhaust ports, and the exhaust ports are preferably inclined;

[0076] Then, the second glass substrate is covered on the first glass substrate, and the edge band is initially bonded between the two glass sheets by hot pressing at 100-140°C. In order to achieve the initial bonding, PET is used as a sealing partition and hot pressing;

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

[0078] Before leaving the vacuum chamber, heat the seal of the removed PET to 150-160°C to partially melt the adhesive sheet, thereby sealing the exhaust port.

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

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

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

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

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

[0084] In combination 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 them.

[0085] In combination with the first aspect, in some embodiments of the present invention, the supports are point supports distributed at intervals of 90-110 mm.

[0086] In combination with the first aspect, in some embodiments of the present invention, the support has a spacing of any one of 90 mm, 95 mm, 100 mm, 105 mm, and 110 mm, or a range formed by any two of the spacings.

[0087] In combination 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 put into the printing room. The printing is consistent with the existing glazed glass screen printing method. 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 on the glass surface, it is dried in an environment of 180-200℃. The drying time can range from 30s to 300s, depending on the drying condition of the composite ink.

[0089] After arranging the supports, put the flat glass containing the supports into the tempering furnace for tempering. During the tempering process, the forced convection system is preferably reduced to avoid too much convection wind, which will lead to short overall heating time and incomplete sintering. The parameters of glass substrates of different thicknesses in different tempering furnaces are inconsistent. The sintering of supports requires high radiation, low convection, and long process parameters. The sintering temperature of the supports is reduced by 8-12°C according to the conventional tempering temperature of the substrate glass thickness, the convection needs to be reduced by 55-65%, and the heating time is extended by 8-10%.

[0090] In combination 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 alloy tin.

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

[0092] In combination 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 combination with the first aspect, in some embodiments of the present invention, the thickness of the edge sealing material is any value among 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 the values.

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

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

[0096] In combination with the first aspect, in some embodiments of the present invention, the method further includes, in step S2, performing a coating treatment on the outer surface of the vacuum glass structure unit.

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

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

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

[0100] Vacuum glazing designs typically include a vacuum layer between two sheets of glass to provide thermal and acoustic insulation. The exterior surface is often specially treated or coated to enhance durability and improve energy efficiency.

[0101] The vacuum magnetron sputtering equipment or high vacuum negative pressure machine can be used to evacuate the gas in the chamber and then perform hot pressing and sealing. If you need to coat the glass surface, you can use the magnetron sputtering vacuum coating production line to coat the outer surface of the glass with a LOW-E film. During this process, the vacuum structure unit obtains a high vacuum state and completes the coating.

[0102] After the coating is completed, before the vacuum degree is gradually restored to the atmosphere, the sealing position is quickly hot-pressed. The hot pressing can be contact-type, 150-160°C, 30s to complete the rapid sealing, and then return to the atmosphere.

[0103] The open vacuum glass structural unit can coat the glass surface while evacuating the vacuum, thereby improving the sunshade effect and heat insulation performance of the vacuum glass.

[0104] After the coating is completed, the vacuum glass can be produced according to the conventional insulating glass production method.

[0105] In combination with the first aspect, in some embodiments of the present invention, the angle formed between the joint and the adjacent glass edge is 40° to 50°.

[0106] The angle between the joint and the adjacent glass edge is 40° to 50°. The edge sealing materials on both sides of the joint are longer and the contact area of ​​the edge sealing materials is larger, which helps to more effectively seal the joint, form a more stable sealing structure, reduce the possibility of gas leakage, and better maintain the vacuum degree inside the vacuum glass. The appropriate angle can ensure that the edge sealing material can be evenly distributed and solidified during the hot pressing sealing process, thereby improving the overall strength and stability of the seal and avoiding potential defects caused by uneven edge sealing.

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

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

[0109] The film material and the edge sealing material will not stick together, so the film material can be taken out directly, and an open vacuum glass structural unit is formed.

[0110] PET film does not adhere to the edge sealing material, so it can be easily removed after vacuuming, forming a clear exhaust hole, simplifying the manufacturing process of vacuum glass. PET film has good isolation properties and can effectively prevent interference from edge sealing materials and other materials during the manufacturing process. PET film is stable to chemical substances and is not easy to react with other materials, ensuring purity and stability during the manufacturing process. PET film has high mechanical strength and certain heat resistance, and can maintain its structural stability during the manufacturing process to avoid deformation or breakage at high temperatures. PET film can be cut and formed, and will not produce a large amount of gas at high temperatures, thereby reducing the impact on the vacuum degree. PET film is relatively economical, easy to use in large-scale production, and reduces manufacturing costs. The above characteristics make PET film an ideal film material in vacuum glass manufacturing, which helps to improve production efficiency and product quality.

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

[0112] Silane coupling agents can enhance the adhesion between the edge sealing material and the first glass, ensure a strong bond between the glass and the edge sealing material, and improve the stability of the overall structure. Silane coupling agents can also improve the adhesion between the edge sealing material and the glass surface, reduce the risk of debonding or peeling, and ensure the sealing performance of the vacuum glass during production and use. Through the action of the promoter, the bond between the glass and the edge sealing material is more durable, increasing the service life of the vacuum glass and reducing the performance degradation caused by interface failure. Furthermore, silane coupling agents help to improve the weather resistance of the interface, making the vacuum glass more adaptable to environmental changes in long-term use and maintaining excellent performance. Therefore, the use of silane coupling agents can ensure the consistency and quality stability of each vacuum glass unit during the manufacturing process, optimize the production process, and improve production efficiency.

[0113] In combination with the first aspect, in some embodiments of the present invention, the arrangement method of the sealing material can be: the tempered glass with the support arranged is cleaned and air-dried, and the cleaning water is deionized water. After cleaning, the hydrolyzed silane coupling agent adhesion promoter is applied to the glass frame 10mm away (or the support is arranged on the tin surface of the glass, this step can be eliminated). After the arrangement is completed, the tin surface of another piece of tempered glass is covered on it to form a structural unit of the vacuum glass.

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

[0115] The higher edge-sealing material can completely cover the thickness of the support, ensuring the tightness between the edge-sealing area and the support, thereby effectively preventing gas leakage and maintaining the vacuum degree of the vacuum glass. The slightly higher edge-sealing material can also provide better support and protection, enhance the overall stability and structural integrity of the vacuum glass, and reduce deformation or breakage caused by pressure or external force. In actual production, there may be a certain tolerance in the thickness of the support. The height of the edge-sealing material is slightly greater than the thickness of the support, which can effectively compensate for these tolerances and ensure the consistency and quality stability of the final product. The higher edge-sealing material can better bond with the glass surface during the hot pressing process, providing a more uniform contact pressure, thereby improving the adhesion and tightness of the edge-sealing material. During the hot pressing and vacuuming process, the higher edge-sealing material can better cope with possible material flow and shrinkage, reducing manufacturing defects caused by insufficient materials.

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

[0117] It can be understood that the vacuum glass of the present invention has a joint interface formed at the joints of the end and end of the edge sealing material. A film material is placed in the joint interface, and the film material and the edge sealing material will not stick together. Therefore, the film material can be taken out directly, and an open vacuum glass structural unit is formed. There is no need to set an exhaust hole, and the production cost is low.

[0118] The vacuum glass of the present invention can be coated on the glass surface while evacuating, further improving the sunshade effect and heat insulation performance of the vacuum glass, and obtaining a composite glass product with an extremely low heat transfer coefficient. Specifically, the U value of the glass is reduced to 0.4-0.7W / m 2 .K or below, the sound insulation performance of glass is significantly reduced compared to traditional vacuum or vacuum, and the processing cost is reduced, making rapid promotion possible.

[0119] The vacuum glass of the present invention has good water vapor sealing performance, which can effectively prevent the penetration of water vapor, thereby improving the sealing effect of the vacuum glass. This is crucial for the thermal insulation and heat insulation performance of the vacuum glass. The edge sealing material has excellent weather resistance and can effectively prevent cracking, thereby extending the service life of the vacuum glass. The material has good weather resistance, can maintain its physical and chemical properties for a long time, is not easily affected by the external environment, and ensures the stable performance of the vacuum glass during long-term use.

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

[0121] The vacuum glass of the present invention comprises at least one piece of vacuum glass, and the vacuum glass surface does not need to be provided with an exhaust hole. While vacuuming, a film can be coated on the glass surface to further improve the sunshade effect and heat insulation performance of the product. When the surface is coated with a silver-containing low-radiation film layer, it needs to be further checked as a hollow glass to prevent the silver layer from oxidizing, thereby obtaining a composite glass product with an extremely low heat transfer coefficient.

[0122] The following will be combined with the embodiments to clearly and completely describe the concept of the present invention and the technical effects produced, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0123] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0124] Unless otherwise specified, "room temperature" in the present invention means 25°C±5°C.

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

[0126] If the specific conditions are not specified in the examples, the experiments were carried out under conventional conditions or conditions recommended by the manufacturer. If the manufacturers of the reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0127] Example 1

[0128] A vacuum glass is prepared, wherein edge sealing materials are first arranged around the edges of the first glass, the ends of the edge sealing materials are connected to form a joint, and a film material is placed in the joint; then a second glass is covered on top of the first glass, and the second glass and the first glass form a vacuum glass structural unit, and after the vacuum glass structural unit is pressed, the edge sealing material bonds the first glass and the second glass, and the film material is removed, and an exhaust hole is formed at the joint, and the vacuum glass structural unit is vacuumed and then hot-pressed and sealed. The specific steps are as follows:

[0129] (1) Arrangement of supports: After cleaning and drying a glass substrate with a length and width of 1m×1m and a thickness of 6mm, use a 0.7mm thick stainless steel screen to print support points. The screen is provided with circular holes with a horizontal and vertical spacing of 100mm and a diameter of 1.2mm. After printing a transparent high-temperature glass ink containing 1wt% tin powder on the glass surface, it is dried at 200℃ for 90s at a drying speed of 3m / min. Finally, a distributed point support with a thickness of 0.7mm, a diameter of 1mm and a spacing of 100mm is formed on the glass;

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

[0131] (3) Arrangement of vacuum edge sealing materials: Apply silane coupling agent adhesion promoter at a distance of 10 mm from the glass frame, and then stick the cut EVA strip with a width of 7 mm and a thickness of 0.76 mm on the coupling agent. The joints between the ends of the EVA strip form a joint interface. The angle between the joint interface and the adjacent glass edge is 45°. Figure 3 As shown, the PET strip is clamped into the fracture;

[0132] (4) Forming the structural unit of vacuum glass. Cover the side with the printed support with another 6mm glass, and perform 120℃ frame hot pressing for 60 minutes. After hot pressing, take out the PET strip directly. At this time, the open vacuum glass structural unit is formed. The corners can be baked and heated with a hot air gun to remove the wrinkles at the corners.

[0133] (5) Preparation of vacuum glass: The prefabricated vacuum glass structure unit is placed in a vacuum magnetron sputtering device, and the vacuum degree of the device is maintained at 3-8×10 -3 mbar, after coating is completed, a hot pressing device is added at the end of the coating chamber. After hot pressing at 150℃, the EVA film softens and bonds to form vacuum coated glass.

[0134] (6) Preparation of insulating glass: The prefabricated vacuum coated glass structure and 6 mm clear glass are prepared into a hollow structure according to conventional insulating glass processing parameters.

[0135] According to the coating type, the heat transfer coefficient and optical performance of vacuum glass can be adjusted. The heat transfer coefficient of ordinary 6mm hollow three-silver structure is about 1.6W / m 2 .K, the heat transfer coefficient of insulating glass with vacuum structure can be reduced to 0.4W / m 2 .K, greatly improving the thermal insulation performance of insulating glass.

[0136] Example 2

[0137] A vacuum glass is prepared, wherein edge sealing materials are first arranged around the edges of the first glass, the ends of the edge sealing materials are connected to form a joint, and a film material is placed in the joint; then a second glass is covered on top of the first glass, and the second glass and the first glass form a vacuum glass structural unit, and after the vacuum glass structural unit is pressed, the edge sealing material bonds the first glass and the second glass, and the film material is removed, and an exhaust hole is formed at the joint, and the vacuum glass structural unit is vacuumed and then hot-pressed and sealed. The specific steps are as follows:

[0138] (1) Arrangement of supports: After cleaning and drying a glass substrate with a length and width of 1m×1m and a thickness of 6mm, use a 0.7mm thick stainless steel screen to print support points. The screen is provided with circular holes with a horizontal and vertical spacing of 100mm and a diameter of 1.2mm. After printing a transparent high-temperature glass ink containing 1wt% tin powder on the glass surface, it is dried at 200℃ for 90s at a drying speed of 3m / min. Finally, a distributed point support with a thickness of 0.7mm, a diameter of 1mm and a spacing of 100mm is formed on the glass;

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

[0140] (3) Arrangement of vacuum edge sealing materials: alloy tin (80% tin, 2% silver, 0.2% copper, 3.5% rosin, 2.3% activator, 7% solvent, 5% thixotropic agent) is mixed and coated at a distance of 10 mm from the glass frame with a thickness of 0.7 mm and a width of about 8 mm. The joints of the edge sealing materials are connected to form a joint, and the angle between the joint and the adjacent glass edge is 45°. After coating, a PET film with a thickness of 0.1 mm is inserted into the alloy tin along the direction of the alloy tin. Figure 3 As shown;

[0141] (4) Forming the structural unit of vacuum glass. Cover the side with the printed support with another 6mm glass, and perform 120℃ frame hot pressing for 60 minutes. After hot pressing, take out the PET strip directly. At this time, the open vacuum glass structural unit is formed. The corners can be baked and heated with a hot air gun to remove the wrinkles at the corners.

[0142] (5) Preparation of vacuum glass: The prefabricated vacuum glass structure unit is placed in a vacuum magnetron sputtering device, and the vacuum degree of the device is maintained at 3-8×10 -3mbar, after coating is completed, a hot pressing device is added at the end of the coating chamber. After hot pressing at 150℃, the EVA film softens and bonds to form vacuum coated glass.

[0143] (6) Preparation of insulating glass: The prefabricated vacuum coated glass structure and 6 mm clear glass are prepared into a hollow structure according to conventional insulating glass processing parameters.

[0144] According to the coating type, the heat transfer coefficient and optical performance of vacuum glass can be adjusted. The heat transfer coefficient of ordinary 6mm hollow three-silver structure is about 1.6W / m 2 .K, the heat transfer coefficient of insulating glass with vacuum structure can be reduced to 0.4W / m 2 .K, greatly improving the thermal insulation performance of insulating glass.

[0145] Comparative Example 1

[0146] The difference from Example 1 is that the joints formed at the ends of the EVA strips form a joint, and the angle formed between the joint and the adjacent glass edge is 90°. Figure 4 shown.

[0147] The angle formed between the joint and the adjacent glass edge is 90°, resulting in a small contact area between the ends of the edge sealing material at the joint, making it impossible to effectively seal the joint, increasing the risk of gas leakage and affecting the stability of the vacuum degree.

[0148] In addition, the small contact area between the end and the end of the edge sealing material at the joint may make it impossible for the edge sealing material to be evenly distributed and solidified during the hot pressing process, resulting in insufficient sealing strength, which in turn affects the overall structural stability of the vacuum glass. The small contact area easily leads to stress concentration at the interface, increasing the risk of glass breakage or damage, especially under temperature changes or mechanical stress.

[0149] Therefore, when the angle between the joint and the adjacent glass edge is 40-50°, the edge sealing material at the joint has a larger 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 the vacuum glass.

[0150] The present invention has been described in detail above in conjunction with the embodiments, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

[0151] The present invention has been described in detail above in conjunction with the embodiments, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A method for preparing vacuum glass, It is characterized in that The following steps are involved: S1: Setting edge sealing materials around the edges of the first glass, where the ends of the edge sealing materials are connected to form a joint, and placing a film material in the joint; S2: Cover the first glass with a second glass, the second glass and the first glass form a vacuum glass structure unit, press the vacuum glass structure unit tightly, bond the first glass and the second glass with the edge sealing material, take out the film material, form an exhaust hole at the joint, evacuate the vacuum glass structure unit and seal it by hot pressing.

2. The preparation method according to claim 1, It is characterized in that A support is also provided in the vacuum glass structure unit; and / or, a method for preparing the support comprises: printing the composite ink onto the glass surface and then drying it.

3. The preparation method according to claim 2, It is characterized in that The components of the composite ink include tin powder and transparent high-temperature glass ink, and the tin powder is added in an amount of 0.5-3wt% in the composite ink.

4. The preparation method according to claim 2, It is characterized in that The thickness of the support is 0.6-0.8 mm; and / or, the diameter of the support is 0.9-1.2 mm; and / or, the support is a point support distributed at a spacing of 90-110 mm.

5. The preparation method according to any one of claims 1 to 4, It is characterized in that The edge sealing material includes at least one of SGP film, EVA film and alloy tin.

6. The preparation method according to any one of claims 1 to 4, It is characterized in that The method further comprises, in step S2, performing a coating process on the outer surface of the vacuum glass structure unit.

7. The preparation method according to any one of claims 1 to 4, It is characterized in that The angle formed between the joint and the adjacent glass edge is 40° to 50°.

8. The preparation method according to any one of claims 1 to 4, It is characterized in that The film material includes a PET film.

9. The preparation method according to any one of claims 1 to 4, It is characterized in that The preparation method further comprises applying a silane coupling agent adhesion promoter to the edges of the first glass before setting the edge sealing material.

10. A vacuum glass, It is characterized in that The method is prepared according to any one of claims 1 to 9.

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