WO2023138044A1 - Pilier de micro-support flexible pour verre isolant sous vide et verre isolant sous vide - Google Patents

Pilier de micro-support flexible pour verre isolant sous vide et verre isolant sous vide Download PDF

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Publication number
WO2023138044A1
WO2023138044A1 PCT/CN2022/113328 CN2022113328W WO2023138044A1 WO 2023138044 A1 WO2023138044 A1 WO 2023138044A1 CN 2022113328 W CN2022113328 W CN 2022113328W WO 2023138044 A1 WO2023138044 A1 WO 2023138044A1
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Prior art keywords
flexible
micropillar
glass
micro
pillar
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PCT/CN2022/113328
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English (en)
Chinese (zh)
Inventor
丁原杰
叶舒
陈琦
王文锋
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福耀高性能玻璃科技(福建)有限公司
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Publication of WO2023138044A1 publication Critical patent/WO2023138044A1/fr

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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/663—Elements for spacing panes
    • E06B3/66304—Discrete spacing elements, e.g. for evacuated glazing units
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
    • C03C27/06—Joining glass to glass by processes other than fusing
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/663—Elements for spacing panes
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/67—Units comprising two or more parallel glass or like panes permanently secured together characterised by additional arrangements or devices for heat or sound insulation or for controlled passage of light
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/67—Units comprising two or more parallel glass or like panes permanently secured together characterised by additional arrangements or devices for heat or sound insulation or for controlled passage of light
    • E06B3/6707—Units comprising two or more parallel glass or like panes permanently secured together characterised by additional arrangements or devices for heat or sound insulation or for controlled passage of light specially adapted for increased acoustical insulation
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/67—Units comprising two or more parallel glass or like panes permanently secured together characterised by additional arrangements or devices for heat or sound insulation or for controlled passage of light
    • E06B3/6715—Units comprising two or more parallel glass or like panes permanently secured together characterised by additional arrangements or devices for heat or sound insulation or for controlled passage of light specially adapted for increased thermal insulation or for controlled passage of light
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/673—Assembling the units
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B80/00—Architectural or constructional elements improving the thermal performance of buildings
    • Y02B80/22—Glazing, e.g. vaccum glazing

Definitions

  • the invention relates to a flexible micro-pillar for vacuum glass and vacuum glass, belonging to the technical field of vacuum glass.
  • Vacuum glass is composed of three components, including glass plates, surrounding packaging materials, and tiny pillars. It has a vacuum interlayer formed by at least two pieces of glass. Usually, the vacuum interlayer is surrounded by materials that can maintain airtightness in a vacuum for a long time, such as low melting point packaging glass. An appropriate number of tiny pillars need to be arranged in the vacuum interlayer to support the glass plates on both sides to avoid being crushed or bent by atmospheric pressure.
  • the thickness of the cavity in the vacuum interlayer is generally controlled below 0.3mm, because this thickness is about the lower limit that can form heat convection in the cavity. Below this thickness, heat convection can be avoided and heat transfer can be isolated.
  • the diameter of the tiny pillars is generally controlled between 0.2-0.5mm.
  • Vacuum glass has the following advantages: 1 It has an extremely low heat transfer coefficient. Taking vacuum glass for construction as an example, it can be as low as 0.8W/m 2 ⁇ K. It is currently the product with the best heat insulation effect in architectural glass; 2 It is the product with the best sound insulation among transparent materials at present, and its weighted sound insulation can reach 35dB; 3 It is not easy to produce dew condensation in a high-humidity environment.
  • the heat conduction of the gas molecules can be ignored.
  • the surrounding package uses a frame structure to strengthen the heat barrier and is equipped with a glass plate coated with an anti-radiation film, the only factor that can cause heat conduction is the tiny support.
  • most of the commercially produced vacuum glass uses stainless steel metal support or ceramic support, both of which are good conductors of sound, greatly reducing the sound insulation function of the vacuum glass.
  • the heat transfer coefficient of the former is about 17W/m K
  • the heat transfer coefficient of the latter is more than 2.7W/m K, both of which are high thermal conductivity materials.
  • FIG. 1 A typical prior art is shown in Figure 1.
  • the main function of the tiny pillars is to support the structure of the vacuum layer and resist atmospheric pressure.
  • the two most important functions of heat insulation and sound insulation of vacuum glass also form a short board.
  • the tiny pillars themselves form thermal bridges and sound bridges on both sides of the vacuum layer, reducing the effectiveness of heat insulation and sound insulation of vacuum glass.
  • the materials of the tiny pillars are mostly made of stronger materials.
  • the most common materials are glass, ceramics, stainless steel, etc.
  • the position where the tiny pillars are in contact with the glass plate in the vacuum layer is the stress concentration point that bears the atmospheric pressure. If the material strength of the tiny pillars is not strong enough and the hardness is weaker than the glass plate, they will be crushed because they cannot withstand the atmospheric pressure, such as glass beads or glass micropillars.
  • the material of the micro-pillar is too strong, such as some superhard ceramics (silicon carbide, silicon nitride, etc.) or high-hardness carbon steel and tungsten steel, the glass at the contact position between the glass plate and the micro-pillar will be scratched and worn, and cracks will appear in severe cases.
  • some superhard ceramics silicon carbide, silicon nitride, etc.
  • high-hardness carbon steel and tungsten steel the glass at the contact position between the glass plate and the micro-pillar will be scratched and worn, and cracks will appear in severe cases.
  • the object of the present invention is to provide a tiny pillar for vacuum glass, which is made of glass fiber material and can provide good sound insulation effect.
  • the object of the present invention is also to provide a vacuum glass using the above-mentioned tiny pillars.
  • the present invention proposes to use the glass fiber layer in the flexible micro-pillar of vacuum glass.
  • the present invention provides a flexible micro-pillar for vacuum glass, wherein the flexible micro-pillar has at least one glass fiber layer.
  • the flexible micropillar has a composite structure composed of more than two glass fiber layers.
  • the flexible micropillar has a composite structure composed of at least two glass fiber layers and at least one metal layer and/or alloy layer, and the metal layer and/or alloy layer is located between the two glass fiber layers.
  • the flexible micropillar has a composite structure consisting of at least three layers of glass fiber layers and at least two layers of metal layers and/or alloy layers, wherein the metal layers and/or alloy layers are arranged at intervals between the glass fiber layers.
  • the thickness of the glass fiber layer is 0.1 mm to 3.0 mm.
  • the thickness of the metal layer or alloy layer is less than 0.3 mm, more preferably 0.01 mm to 0.3 mm.
  • the diameter of the flexible micropillar is 0.2mm-2.0mm; preferably 0.2mm-0.5mm.
  • the thermal conductivity of the flexible micropillars is ⁇ 1W/m ⁇ K (25°C).
  • the glass fiber layer is made of ultrafine glass fibers.
  • the thermal conductivity of the glass fiber layer is ⁇ 0.03W/m ⁇ K (25°C).
  • the specific surface area of the glass fiber layer is 700-800 m 2 /g.
  • the material of the metal layer includes one of aluminum, copper, iron, tin, and zinc.
  • the material of the alloy layer includes an alloy of two or more elements among aluminum, copper, iron, tin, and zinc.
  • the present invention also provides a vacuum glass, which adopts the above-mentioned flexible micro pillars as the micro pillars of the vacuum cavity.
  • Figure 1 is a schematic diagram of the vacuum glass structure and heat transfer.
  • Figure 2A and Figure 2B show the microstructure inside the airgel.
  • Fig. 3 is a schematic diagram of the flexible micropillar structure.
  • Fig. 4 is a relationship curve between the thermal conductivity k value of the flexible micropillar and the thermal conductivity U value of the vacuum glass.
  • Fig. 5A and Fig. 5B are views of the flexible micro-pillars produced after passing through the die respectively, wherein Fig. 5A is a front view, and Fig. 5B is a side view.
  • An embodiment of one aspect of the present invention relates to a flexible micro-pillar for vacuum glass, wherein the flexible micro-pillar has at least one glass fiber layer.
  • the present invention uses a glass fiber layer (or glass fiber cloth) composed of glass fibers.
  • This glass fiber layer has characteristics similar to airgel, and its thickness can be made between 0.3-2.0mm.
  • the glass fiber layer may be made of ultrafine glass fibers.
  • the material of ultra-fine glass fiber can be one or more combinations of silicate glass such as aluminosilicate glass, borosilicate glass, soda lime glass, borosilicate glass and quartz glass.
  • silicate glass such as aluminosilicate glass, borosilicate glass, soda lime glass, borosilicate glass and quartz glass.
  • the glass fiber is made of silicate glass, as long as the fiber is fine enough, it can be blended into glass fiber cloth to be used as the glass fiber layer of the present invention, and can exhibit strong elasticity and heat insulation effect.
  • the surface of the fiber can be treated with hydrophobicity (hydrophobic treatment can be carried out in a conventional way).
  • the sheet-like material composed of this ultrafine glass fiber is also a micro-nano material, which has very good heat insulation and sound absorption performance.
  • microstructure can be seen in Figure 2A and Figure 2B.
  • This micro-nano fiber structure can form a large-area sheet similar to paper or cloth, which can be manufactured in a roll-to-roll manner.
  • the formed sheet has good flexibility and toughness.
  • the elasticity can be restored to its original shape.
  • the material microstructure inside the glass fiber layer is mainly composed of air and microfibers (as shown in Figure 2A and Figure 2B).
  • the present invention adopts the glass fiber layer as a component of the flexible micro-pillar used in vacuum glass.
  • This microstructure of the glass fiber layer can be used to make the glass fiber layer beneficial to heat insulation and sound wave absorption, while providing elasticity and toughness when impacted by external forces.
  • the flexible micropillar preferably has a composite structure composed of more than two glass fiber layers.
  • the composite structure composed of multiple glass fiber layers can be formed by sticking and superimposing the glass fiber layers.
  • the ultra-fine glass fiber layer has a micro-nano network pore structure and is a good thermal insulation material.
  • the ultra-fine glass fiber layer can be regarded as an excellent sound-absorbing material
  • the sound-absorbing material does not have the ability to reflect sound waves, and is usually not a good sound-insulating material.
  • Vacuum itself is the best heat insulation and sound insulation state.
  • the transmission of heat or sound waves (vibration waves) depends on the medium. Most of the heat and sound energy are transmitted by the continuous surface of the glass fiber (glass parallel surface), and a small amount of energy is transmitted across the layer of the glass fiber layer (vertical glass plate), so it has the effect of breaking the bridge, and the heat insulation and sound insulation have similar situations. But the wavelength of sound waves is relatively large, especially low-frequency sound, and the thickness of the vacuum layer is very thin, which is not conducive to sound insulation.
  • the flexible micro-pillar of the present invention is composited with a metal layer, an alloy layer and a glass fiber layer, and a metal layer/alloy layer is sandwiched between the glass fiber layers.
  • the net-like pore structure of the glass fiber layer is absorbed, thereby improving the overall sound insulation effect, so that the obtained flexible micro-pillar has good sound insulation function.
  • the ultra-fine glass fiber layer itself is composed of micron-sized short glass fibers, when it is made into flexible micro-pillars and applied to vacuum glass, its weaving direction is parallel to the glass plate, that is, perpendicular to the installation direction of the flexible micro-pillars. Therefore, the direction of these woven layered fibers has the effect of breaking the bridge for heat and sound transmission, and this arrangement itself has the effect of blocking heat and sound waves.
  • this fiber arrangement method also makes the flexible micro-pillars quite compressible. When the flexible micro-pillars are arranged on the glass plate, as shown in Figure 3, if the original height is h, they will bear the pressure of the glass plates on both sides after vacuuming.
  • micro-pillars and the surrounding packaging wall of the vacuum glass share the pressure of one atmospheric pressure in the air.
  • the micro-pillars composed of multi-layer ultra-fine glass fiber cloth will be squeezed.
  • the struts remain elastic. Because the inside of the ultra-fine glass fiber layer is composed of countless long and short fibers intertwined, it still maintains toughness even if it is squeezed by external force.
  • the glass plate itself can be elastically deformed with the external force, and will not be subject to the flexible micro-pillar made of ultra-fine glass fiber layer, and this flexible micro-pillar can help absorb part of the external force like a spring, but it has flexible elasticity, so it will not cause scratches or cracks on the surface of the glass plate.
  • the flexible micropillar has a composite structure composed of at least two layers of glass fiber and at least one metal layer and/or alloy layer, and the metal layer and/or alloy layer is located between the two layers of glass fiber.
  • the total number of metal layers and alloy layers is more than two layers, they can be respectively arranged at intervals between different glass fiber layers.
  • the flexible micropillar has a composite structure composed of at least three layers of glass fiber and at least two layers of metal and/or alloy layers, wherein the metal layer and/or alloy layer are arranged at intervals between the glass fiber layers.
  • the material of the metal layer includes one of aluminum, copper, iron, tin, and zinc; the material of the alloy layer includes an alloy of two or more elements in aluminum, copper, iron, tin, and zinc, wherein the alloy includes stainless steel.
  • the thickness of the glass fiber layer used in the flexible micropillars of the present invention may be 0.1mm to 3.0mm, preferably 1.0mm-3.0mm.
  • the thickness of the glass fiber layer can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.
  • the glass fiber layer has a specific surface area of 700-800 m 2 /g.
  • the specific surface area of the glass fiber layer can be 700m 2 /g, 710m 2 /g, 720m 2 /g, 730m 2 /g, 740m 2 /g, 750m 2 / g, 760m 2 /g, 770m 2 /g, 780m 2 / g, 790m 2 /g, 800m 2 /g, or a value composed of the above-mentioned specific thickness values as endpoints Range, for example: 710-790m 2 /g, 720-780m 2 /g, 730-770m 2 /g, 740-760m 2 /g, etc.
  • the thickness of the metal layer or alloy layer used in the flexible micropillars with a composite structure is less than 0.3 mm, preferably 0.01 mm to 0.3 mm.
  • the thickness of the metal layer or alloy layer can be 0.3mm, 0.2mm, 0.1mm, 0.01mm, or a numerical range based on the above-mentioned specific thickness value as an endpoint, such as 0.2mm to 0.3mm, 0.1mm to 0.3mm, 0.1mm to 0.2mm, 0.01mm to 0.1mm, 0.01mm to 0.2mm, etc.
  • the diameter of the flexible micropillar is 0.2mm-2.0mm; preferably 0.2mm-0.5mm.
  • the diameter of the flexible micropillars can be 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, or a numerical range composed of the endpoints of the above-mentioned specific thickness values, such as 0.3 mm to 0.9mm, 0.4mm to 1.8mm, 0.5mm to 1.7mm, 0.6mm to 1.6mm, 0.7mm to 1.5mm, 0.8mm to 1.4mm, 0.9mm to 1.3mm, 1.0mm to 1.2mm, etc.
  • the thermal conductivity of the flexible micropillars is ⁇ 1.0W/m ⁇ K (25°C); preferably, the thermal conductivity of the flexible micropillars is ⁇ 0.25W/m ⁇ K (25°C).
  • the thermal conductivity of the flexible micropillars can be 0.05W/m ⁇ K(25°C), 0.1W/m ⁇ K(25°C), 0.15W/m ⁇ K(25°C), 0.2W/m ⁇ K(25°C), 0.25W/m ⁇ K(25°C), 0.3W/m ⁇ K(25°C), 0.35W/m ⁇ K(25°C), 0.4W/m ⁇ K K(25°C), 0.45W/m ⁇ K(25°C), 0.5W/m ⁇ K(25°C), 0.55W/m ⁇ K(25°C), 0.6W/m ⁇ K(25°C), 0.65W/m ⁇ K(25°C), 0.7W/m ⁇ K(25°C), 0.75W/m ⁇ K(25°C).
  • the thermal conductivity of the glass fiber layer is ⁇ 0.03 W/m ⁇ K (25° C.).
  • the thermal conductivity of the glass fiber layer can be 0.01W/m ⁇ K(25°C), 0.02W/m ⁇ K(25°C), 0.03W/m ⁇ K(25°C), or a numerical range based on the above-mentioned specific thickness value as an endpoint, for example: 0.01-0.03W/m ⁇ K(25°C), 0.01-0.02W/m ⁇ K(25°C), 0.02-0.03 W/m ⁇ K (25°C), etc.
  • the heat conduction of vacuum glass can be carried out through four paths, namely heat radiation, heat transfer of micro-pillars, heat transfer of residual gas, and heat transfer of peripheral sealing frame.
  • the thermal bridge formed by the tiny pillars causes the largest heat transfer, which reduces the high heat insulation effect that the vacuum glass should have to a considerable extent.
  • the following is only a mathematical analysis of the heat conduction of the tiny pillars in the vacuum glass.
  • C pillars is the thermal conductivity of the flexible micro-pillars, the unit is W/(m 2 K), k g is the thermal conductivity of glass, the recommended value is 1.0W/m K; h is the height of the micro-pillars (m); a is the radius of the micro-pillars (m); b is the spacing of the micro-pillars (m); k pillar is the thermal conductivity of the micro-pillar material, the unit is W/m K.
  • k soft pillar 0.03W/(m ⁇ K)
  • the use of flexible micro-pillars can reduce the heat transfer by 92.6%.
  • the curve shown in Figure 4 represents the relationship between the thermal conductivity k value of the micro-pillar and the thermal conductivity U value of the vacuum glass.
  • the two pieces of glass constituting the vacuum layer are soda-lime glass with a thickness of 4 mm, and the four sides are sealed with glass. 40mm and a height of 0.15mm. From the experimental data and the mathematical simulation curve, it can be known that when the above conditions are fixed, as the thermal conductivity k value of the micro-pillar decreases, for example, the k value of the stainless steel micro-pillar is 17W/m K, the k value of the ceramic micro-pillar is 2.7W/m K, and the k value of the ultra - fine glass fiber cloth is 0.03W /m K. %.
  • P atm is the atmospheric pressure. If the configuration in Calculation Example 1 is used, the static pressure P value of each micro-pillar will be as high as 8 ⁇ 10 3 P atm , which is close to the pressure intensity of 1GPa. Furthermore, if the height of the micro-pillars arranged in the vacuum layer is slightly deviated, whether it is due to the height difference of the micro-pillars itself or the process error during point layout, the micro-pillars actually supporting the glass plate will bear greater pressure.
  • the yield strength of stainless steel is about 2 ⁇ 10 8 Pa.
  • the characteristic of rigid materials is that when the external force exceeds its material strength, it will break, rather than deform like metal materials. Therefore, it is difficult for glass beads to be used as a pillar material in vacuum glass.
  • the material strength of porous glass beads it is weaker and more difficult to be used in vacuum glass.
  • ceramics and alloy steels such as but not limited to: alumina, zirconia, tungsten steel, etc., whose material rupture strength exceeds 1GPa, and the rigidity is strong. If microbeads made of such materials are used as pillars, the pillars will be intact but the glass plate will break from the contact point.
  • the present invention uses a glass fiber layer to make flexible micro-pillars, which can replace the existing hard micro-pillars.
  • the micro-pillars themselves will not be damaged and at the same time can provide supporting force, and can cooperate with the deformation of the glass when it is subjected to an external force to avoid glass damage, and can well solve the problems existing in the existing micro-pillars.
  • the cross-section of the flexible micropillars can be any suitable shape, such as circular, elliptical, rectangular, triangular, polygonal with more than five sides, and annular; wherein, the annular can include circular rings, square rings, triangular rings, polygonal rings, irregular rings with different shapes for the hollow part and the periphery.
  • the whole of the flexible micro-pillar is in the shape of a trapezoid or a column, and there are planes at both ends so as to be in contact with the glass plate of the vacuum glass.
  • the truncated shape may include circular truncated, elliptical truncated, prism or annular truncated;
  • the cylindrical shape may include cylindrical, elliptical cylindrical, rectangular cylindrical, prismatic or circular cylindrical.
  • Above-mentioned prism can comprise triangular prism, quadrangular prism, polygonal prism with more than five edges;
  • Above-mentioned annular pedestal can comprise annular prism, square annular prism or polygonal prism; Above-mentioned prism comprises triangular prism, quadrangular prism, polygonal prism with more than five edges;
  • Above-mentioned annular prism comprises circular annular prism, square annular prism or polygonal annular prism.
  • the flexible micropillars of the present invention can be in the shape of a trapezium or a column with irregular sides, such as a drum shape.
  • the flexible micro-pillar of the present invention has elasticity and can be compressed, and the amount of compression is larger than that of other materials (stainless steel, ceramics) currently used as micro-pillars, and can allow the micro-pillars to have a large amount of elastic deformation.
  • the flexible micropillars of the present invention can still effectively support the glass plate against atmospheric pressure after being compressed. Furthermore, it can also cooperate with the deformation of the glass plate when the glass plate is subjected to external force, so that the glass plate can be protected so that the glass plate is not easy to break at the supporting point.
  • the height of the flexible micropillars of the present invention under compression at a pressure of 1 atmosphere is not less than 0.10 mm, preferably 0.15-0.5 mm, more preferably 0.15-0.25 mm.
  • Another aspect of the present invention relates to a vacuum glass, which adopts the flexible micro-pillar provided by the present invention as the micro-pillar of the vacuum chamber.
  • the vacuum glass has at least two glass plates, a vacuum cavity is formed between the two glass plates, and flexible micro pillars are distributed in the vacuum cavity.
  • the thermal conductivity of the flexible micropillars meets:
  • C pillars is the thermal conductivity of the flexible micro-pillars in W/(m 2 K)
  • k pillar is the thermal conductivity of the flexible micro-pillars in W/(m K)
  • k g is the thermal conductivity of glass in W/(m K)
  • a is the radius of the flexible micro-pillars in mm
  • b is the distance between the flexible micro-pillars in mm
  • h is the equilibrium height of the flexible micro-pillars after compression, in mm.
  • the distance between the flexible micro-pillars is not less than 30mm, preferably 40-60mm.
  • the height of the vacuum cavity is less than 0.3mm, preferably 0.15-0.25mm.
  • the invention proposes an innovative method, using flexible micro-pillars made of glass fibers, which can greatly improve the effect of sound insulation.
  • the elastic effect of the flexible struts can reduce the chance of glass breakage caused by excessive stress at the position where the glass is in contact with the micro-pillars when it is impacted by the outside.
  • the main components of the glass fiber used in the present invention are generally alumina and silicon oxide, which are melted at a temperature above 1600°C and made into short fibers with a diameter of less than 10 microns, and then rolled into glass fiber cloth by a special process.
  • Step 1 Glass fiber cloth can be purchased from Jingning Technology (Beijing) Co., Ltd., and its material contains silicon oxide ⁇ 60%, aluminum oxide ⁇ 35%; trade name: airgel insulation cloth; width 600mm (coil), thickness 0.4mm, white translucent, thermal conductivity at 25°C at room temperature 0.03W/m ⁇ K.
  • Step 2 When the product is subjected to 1 atmospheric pressure, the thickness will decrease by about 60%.
  • the height of the vacuum layer is set to 0.4mm. Two pieces of glass fiber cloth with a thickness of 0.4mm are used, and a layer of metal foil with a thickness of 80 ⁇ m is sandwiched between them. It can be but is not limited to aluminum foil, copper foil, etc.
  • the initial thickness of the three is 0.88mm. The design of the flexible pillar structure and the initial thickness of the vacuum layer at different heights can be analogized.
  • Step 3 After gluing the above-mentioned three-layer or multi-layer structure, put the finished product in a vacuum oven at 120°C to exhaust air, then use a punching machine and an appropriate mold to make micro-pillars with diameters ranging from 0.3-1.0 mm, and store the fabricated micro-pillars for future use.
  • Figure 5A and Figure 5B are the front view and side view of the flexible strut after die forming, respectively, wherein the curve in Figure 5B represents the appearance measured by the visible area of the optical microscope, and it can be seen from Figure 5A and Figure 5B that the appearance of the circular strut under the optical side measurement is circular. Although it is not a perfect circle, it can be determined that the flexible strut is cylindrical.
  • the multi-layer structure of the flexible micro-pillar provided by the embodiment includes a fiber cloth composed of ultrafine glass fibers. 80% of the volume in the fiber cloth is air. When placed in a vacuum layer, the original part of the air becomes a vacuum. The vacuum can reduce heat conduction and sound insulation. At the same time, the fiber cloth is an open porous material. When the sound wave passes through the first layer of glass plate into the first layer of fiber cloth, part of the sound wave will be blocked by the vacuum inside the glass fiber cloth, another part of the sound wave will be absorbed by the glass fiber, and a part of the sound wave can continue to pass through the glass fiber; In the process of repeated reflections, the sound waves will be gradually absorbed by the sound-absorbing function of the glass fiber, so a better sound insulation effect can be obtained.
  • the metal foil/alloy foil In addition to the above reflection, part of the sound waves will pass through the metal foil/alloy foil and be transmitted to the second layer of glass fiber cloth. Although the metal foil/alloy foil itself will absorb some sound waves, the amount of absorption will not be too obvious, because metal and alloy are relatively good sound wave reflection materials, and the sound absorption capacity is not obvious.
  • the sound waves transmitted to the second layer of glass fiber cloth have undergone the attenuation process of the first layer of fiber cloth, and repeated reflection and absorption of sound waves between the metal foil/alloy foil and the second layer of glass plate will also occur in the second layer of fiber cloth, and finally only a part of the remaining sound waves will be transmitted to the outside of the second layer of glass.
  • the sound insulation is tested for insulating glass and vacuum glass using different micropillars.
  • the different materials constituting the micropillars include stainless steel microbeads, hollow glass microbeads, solid glass microspheres, porous glass microbeads, and ultrafine glass fiber cloth (that is, the raw material of the flexible micropillars of the present invention).
  • the sample consists of two pieces of soda-lime glass with a thickness of 1.8mm and an interlayer with a thickness of 1.8mm. Fill the material under test into the interlayer for measurement, and use Hangzhou Aihua AWA6290T sound insulation/absorption coefficient test system. The test results are summarized in Table 2 below.
  • the sound insulation efficiency of flexible micropillars mainly composed of ultrafine glass fiber cloth is higher than that of stainless steel microbeads, hollow or porous glass microbeads and other micropillars.
  • the flexible micro-pillar with glass fiber cloth as the main body is also obviously superior in sound insulation function.
  • the weighted sound insulation (Rw) of the latter has improved by 22% than the former, up to 44dB; the low-frequency average sound insulation of the latter has improved by 35% than the former, up to 46.6dB.

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
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  • Laminated Bodies (AREA)

Abstract

La présente invention concerne un pilier de micro-support flexible pour un verre isolant sous vide et un verre isolant sous vide. En ce qui concerne pilier de micro-support flexible pour un verre isolant sous vide, le pilier de micro-support flexible possède au moins une couche de fibres de verre. Le verre isolant sous vide selon la présente invention utilise le pilier de micro-support flexible comme un pilier de micro-support d'une chambre à vide. La présente invention concerne un procédé innovant, qui utilise le pilier de micro-support flexible constitué de fibres de verre pour améliorer considérablement un effet d'isolation sonore, et en outre, au moyen d'un effet élastique du pilier de micro-support flexible, peut réduire une probabilité que du verre soit brisé en raison d'une contrainte excessivement élevée sur une position en contact avec le pilier de micro-support lorsqu'il souffre d'un impact externe.
PCT/CN2022/113328 2022-01-21 2022-08-18 Pilier de micro-support flexible pour verre isolant sous vide et verre isolant sous vide WO2023138044A1 (fr)

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CN202210074202.5 2022-01-21
CN202210074202.5A CN116517441A (zh) 2022-01-21 2022-01-21 一种用于真空玻璃的柔性微支柱以及真空玻璃

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1168708A (zh) * 1994-10-19 1997-12-24 悉尼大学 真空玻璃窗的结构改进
US20010012545A1 (en) * 1999-11-16 2001-08-09 Raymond Nalepka Vacuum IG window unit with fiber inclusive edge seal
CN1800069A (zh) * 2005-12-02 2006-07-12 张煊 钢柔复合支撑的真空玻璃
CN110156347A (zh) * 2019-03-19 2019-08-23 武汉理工大学 一种支撑物为玻璃纤维格栅的真空玻璃及其制作方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1168708A (zh) * 1994-10-19 1997-12-24 悉尼大学 真空玻璃窗的结构改进
US20010012545A1 (en) * 1999-11-16 2001-08-09 Raymond Nalepka Vacuum IG window unit with fiber inclusive edge seal
CN1800069A (zh) * 2005-12-02 2006-07-12 张煊 钢柔复合支撑的真空玻璃
CN110156347A (zh) * 2019-03-19 2019-08-23 武汉理工大学 一种支撑物为玻璃纤维格栅的真空玻璃及其制作方法

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