CN103420623A - Dual-vacuum-layer metal vacuum composite board provided with getter, and preparation method of same - Google Patents
Dual-vacuum-layer metal vacuum composite board provided with getter, and preparation method of same Download PDFInfo
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- CN103420623A CN103420623A CN2013102984689A CN201310298468A CN103420623A CN 103420623 A CN103420623 A CN 103420623A CN 2013102984689 A CN2013102984689 A CN 2013102984689A CN 201310298468 A CN201310298468 A CN 201310298468A CN 103420623 A CN103420623 A CN 103420623A
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Abstract
A dual-vacuum-layer metal vacuum composite board provided with a getter comprises a face plate, a connecting layer and a vacuum cavity and is characterized in that the face plate and/or the connecting layer supply/supplies additional strength for the vacuum cavity and ensures smoothness of the vacuum cavity; the vacuum cavity is a sealed cavity formed in the way that the edge of a metal plate is sealed through welding under normal pressure and an opening is sealed under high temperature in vacuum; the opening is sealed in the way that an extraction opening prefabricated on the vacuum cavity is sealed automatically in a vacuum furnace through low-temperature welding flux according to the liquid seal principle; a partition board is arranged in the vacuum cavity and divides the vacuum cavity into two vacuum layers; supporters are arranged in the vacuum layers. According to the invention, the manufacturing method and process is simple, and the prepared dual-vacuum-layer metal vacuum composite board can overcome the defects of the conventional insulation boards and vacuum insulation panels and is improved in strength, thermal insulation, sound insulation and fireproof performance and in decorative function.
Description
Technical field
The present invention relates to the energy-saving building technology field, relate in particular to a kind of composite evacuated plate of two vacuum layer glass that getter is arranged and preparation method thereof.
Background technology
China's architectural energy consumption accounted for whole society power consumption 1/3 or more and be the trend increased year by year, adopting heat preservation construction material is one of Main Means of reduction building energy consumption.At present building exterior wall heat preserving material used is many is B level lagging material, as organic materialss such as polystyrene, urethane, bipeltates, these organic materials resistance toheats are poor, easy firing, not only discharge a large amount of heats during burning, produce a large amount of poison gas, and can accelerate large fire spreading; Simultaneously, molten contracting can occur in organic materials when fire, produce the burning dropping, on the initiation thermal insulation layer, institute's tiling comes off, cause possibly spot fire and secondary injury, so national departments concerned is prohibited exterior-wall heat insulation and is used organic insulation material, particularly at Highrise buildings and public building.In combustionproperty, reach in the lagging material of A grade standard, mainly to take the inorganic materials that mineral wool and rock wool be representative, but existing home made article has very large gap at aspects such as water-intake rate, intensity, weathering resistancies with the Application in Building requirement, it is directly used in to construction wall insulation, water suction, tenesmus, the problem such as softening will occur.In addition, A level lagging material cost is far away higher than organic materials, and the complicated construction technique construction cost is far beyond the expense of B level lagging material, and its heat-insulating property is poor and energy consumption is high, can not meet the needs of national current energy-saving and emission-reduction.
Vacuum heat-insulating plate is a kind of novel lagging material grown up in recent years, mainly comprise vacuum bag and core etc., its major advantage is that to belong to A level lagging material, good heat insulating, thin thickness, unit mass light etc., but also there is obvious shortcoming difficulty as dry as core, vacuum bag poor air-tightness, puncture intensity are low, and soon, easily rise bag, insulation life-span of vacuum decay is short etc.In addition, above lagging material all needs to increase the decoration protective layer.
Summary of the invention
?technical problem to be solved by this invention is to be for the existing building thermal baffle, warming plate, the defect that vacuum heat-insulating plate exists, a kind of novel composite evacuated plate of two vacuum layer glass of getter and preparation method thereof that has is provided, the making method technique of this composite evacuated plate of two vacuum layer glass that getter arranged is simple, the prepared composite evacuated plate of two vacuum layer glass that getter is arranged can overcome existing thermal baffle, the deficiency of vacuum heat-insulating plate and warming plate, can effectively ensure the resistance to air loss of the composite evacuated plate of two vacuum layer glass of getter, increase the service life, and can increase its intensity and heat insulation, sound insulation, fire resistance, also there is good decorative effect simultaneously.
In order to solve the problems of the technologies described above, the invention provides a kind of composite evacuated plate of two vacuum layer glass that getter is arranged, comprise panel, articulamentum and vacuum chamber, it is characterized in that described panel is sheet glass, described panel and or described articulamentum provide additional strength for described vacuum chamber, guarantee vacuum chamber planarization under atmospheric pressure, described vacuum chamber is to weld edge sealing by metal sheet under normal pressure, under vacuum, high temperature seals and the closed cavity of formation, described sealing is in vacuum oven, to utilize solder according to hydraulic seal principle automatic-sealed pre-bleeding point on vacuum chamber, getter and dividing plate are arranged in described vacuum chamber, described dividing plate forms two vacuum layer by being divided into two in described vacuum chamber, in described vacuum layer, upholder is arranged, above support be make separately or on vacuum chamber or dividing plate, directly form.
In order to solve the problems of the technologies described above, the invention provides a kind of making method that the composite evacuated plate of two vacuum layer glass of getter is arranged, it is characterized in that comprising the following steps:
The first step, make respectively two panels and two metal sheets that are used to form vacuum chamber according to shape and the size of the composite evacuated plate of two vacuum layer glass that getter is arranged of required making, two metal sheets that are used to form vacuum chamber are carried out to the flanging moulding, and make upholder and bleeding point on two metal sheets, or upholder is produced on dividing plate;
Second step, first two panels are joined together to form to composition board, also reserved bleed-off passage by articulamentum and two metal sheets respectively, the alignment of two composition boards is fastened again and weld together, put a dividing plate between two composition boards, then the peripheral weld of two metal sheets is connected together; Two metal sheet alignment that perhaps first will be used to form vacuum chamber fasten, dividing plate is placed between two metal sheets, and then peripheral weld is connected together, then are joined together to form composition board, also reserved bleed-off passage by articulamentum and two panels; Getter is placed in vacuum chamber, solder is placed in bleeding point, and composition board is sent in vacuum oven, once can send into several piece;
The 3rd step, first vacuum oven is warming up to the curing temperature of articulamentum, again vacuum oven is evacuated to below 0.1Pa, then vacuum oven is warming up to the temperature of sealing, the solder fusing is by the bleeding point self-closed, solidify and rear vacuum chamber is realized to the resistance to air loss welding with stove cooling, solder, open the composite evacuated plate of two vacuum layer glass that vacuum oven obtains getter.
Wherein, described have the composite evacuated plate of two vacuum layer glass of getter to comprise the various forms of sheet materials such as smooth plate, curved slab, bending plate, sketch plate.
Wherein, the described composite evacuated plate of two vacuum layer glass that getter arranged is useful on web member that use is installed or groove etc.
Wherein, described have the composite evacuated plate of two vacuum layer glass of getter or the surrounding of vacuum chamber to scribble seal gum or structure glue.
Wherein, described panel is sheet glass, as simple glass, toughened glass, semi-tempered glass, coated glass, figured glass, sand blasting glass etc., ornament layer can be arranged above it, as colored glaze etc.;
Further, the preferred toughened glass of described panel, to increase its intensity and security;
Further, described panel is single sheet glass, or glass composite board;
Further, described panel can be commaterial, can be also two kinds of different materials.
Wherein, described articulamentum is tackiness agent or plastics sheet;
Further, described tackiness agent comprises organic gel, inorganic glue and composite adhesive, is commercially available prod; Described organic gel comprises thermosetting cement, hot melt adhesive etc., and preferred resistant to elevated temperatures tackiness agent, as resol, epoxy resin, silicone resin etc.;
Further, the preferred resistant to elevated temperatures thermoplastics of described plastics sheet, as polymeric amide, poly-mock, PVB film etc.
Wherein, described articulamentum can be one to several layers;
Further, in described articulamentum or between described articulamentum, enhancement Layer or stiffener can be arranged, as fiber, stiffening web, reinforcing mat, stiffening plate etc.
Wherein, described articulamentum can before vacuumizing or in vacuum or after vacuumizing connect as one panel and vacuum chamber.
Wherein, described vacuum chamber is that described metal sheet is ultra thin plate by one or two air-tight cavities that metal sheet is welded, and thickness is 0.1-1mm, preferably 0.15-0.5mm.
Wherein, described vacuum chamber can be one to several, and when described vacuum chamber is two, upper and lower two vacuum chambers stack bonding along the diagonal lines dislocation of lower upper surface, make it form landing edge, the limit section heat bridge impact while installing to reduce described composite evacuated plate.
Wherein, the material that the metal sheet of described vacuum chamber is low radiation, as adopted mirror board, or its surface through processing make its there is extremely low radiant ratio, as aluminium plating film etc.
Wherein, the inwall of described vacuum chamber can have coating heat insulation, sound insulation.
Wherein, described getter automatic activation under high temperature, high vacuum in the sealing process.
Wherein, described getter comprises evaporable air-absorbing agent and nonevaporable getter.
Wherein, described getter is the various ways such as powdery, granular, banded, tubulose, ring-type, column.
Wherein, described getter can directly be put into described vacuum chamber or bleeding point, also can be contained in a container and put into described vacuum chamber or bleeding point again.
Wherein, the preferred low-temperature metal scolder of described solder and solder, as tin, zinc, magnesium etc. and alloy thereof, described material is existing commercial commodity.
Wherein, described dividing plate is metal sheet, sheet glass, ceramic plate or resistant to elevated temperatures superpolymer plate.
Wherein, described dividing plate can be integrally welded with the inwall of vacuum chamber, makes vacuum chamber form two independently vacuum layer; Described dividing plate also can be placed directly in vacuum chamber, makes vacuum chamber form the vacuum layer of two UNICOMs.
Wherein, described dividing plate is that mirror board or its surface are coated with low-radiation film.
Wherein, described welding comprises melting welding, pressure welding, soldering etc., as argon arc welding, laser welding, ultrasonic welding, low melting point metal and alloy welding and other welding processs for metal sheet especially ultra-thin metal plates.
Wherein, described bleeding point can be arranged on surface or the side of vacuum chamber.
Wherein, described bleeding point can directly be made in the vacuum chamber punching press, also can first make bleeding point and be welded on vacuum chamber.
Wherein, described bleeding point has one or two, and described vacuum layer can share a bleeding point or each vacuum layer respectively has a bleeding point.
Wherein, described vacuum oven or the single-unit furnace of batch production, or the tunnel kiln of continous way production; The vacuum tightness of described vacuum oven is 0.1-0.001Pa, is preferably 0.05-0.005Pa; The temperature of described vacuum oven is 150-450 ℃, is preferably 280-350 ℃.
Wherein, above support can be the upholder of making separately, can be also by mechanical means projection as formed as punching press, as point, line etc. on the metal sheet of making vacuum chamber;
Further, when above support is made separately, be point, line or the net etc. that adopt the materials such as metal, glass, pottery, superpolymer to make.
Wherein, above support has one to several layers.
Wherein, above support can directly be produced on described dividing plate, also can form one by punching press, roll extrusion and welding, the mode such as bonding with the inwall of described vacuum chamber.
The invention has the beneficial effects as follows:
The sealed structure of composite evacuated its getter of plate of two vacuum layer glass that getter arranged of the present invention is simple, it is reliable, convenient for production, with low cost to seal; In vacuum oven under high temperature, high vacuum, direct activated degasser not only, and can effectively remove the getter surface adsorption gas, make getter regeneration, guaranteed the gettering ability of getter; Its space of vacuum chamber or bleeding point comparatively speaking can be very large, so can lay more substantial getter, not only can make that the vacuum tightness of vacuum chamber is higher but also the time that maintain is longer; Vacuum chamber is the protection that articulamentum and panel were made and had to metal sheet, thus there is fabulous resistance to air loss, puncture intensity and low radiant ratio, thereby not only heat-proof quality is good but also have extremely long work-ing life; The thickness of vacuum chamber is minimum, is generally less than 1 millimeter, so the thickness of whole composition board can be very little, minimum only has several millimeters, and, the space that take less than the thickness of existing vacuum heat-insulating plate still less; The composite evacuated plate of two vacuum layer glass that getter arranged of the present invention is formed by the Material cladding of several different shapeies and material, the resonance effect while having prevented sound transmission, and the existence of vacuum layer in addition, so have good sound-proofing properties; The composite evacuated plate of two vacuum layer glass by getter of the present invention mainly is comprised of glass and metallic substance, and articulamentum can be selected inorganic materials or fire retardant material, so have good fire resistance; Of the present invention have its panel of the composite evacuated plate of two vacuum layer glass of getter can select the sheet glass of multiple decoration, so have good decorative effect, do not need to do ornament layer after installation again, not only saves material and also save manpower and time; Of the present invention have the composite evacuated plate of two vacuum layer glass of getter to be made by glass and composite metal plate, thus thin thickness, lightweight not only, and there is very high physical strength; Its vacuum chamber of the composite evacuated plate of two vacuum layer glass that getter arranged of the present invention is divided into two and forms two vacuum layer by dividing plate, and the cost of increase and operation seldom, but can effectively improve heat insulation, sound insulation and the mechanical property of composite evacuated plate; Of the present invention have the composite evacuated plate of two vacuum layer glass of getter to adopt normal temperature and pressure lower sealing edge, high-temperature vacuum lower sealing, its manufacture craft is simple, production cost is low, can mechanize, automatization, production in enormous quantities, product can be widely used in interior wall, exterior wall and curtain wall, can greatly reduce the consumption of material and the energy, the weight that alleviates buildings, shortening building cycle; Of the present invention have the composite evacuated plate of two vacuum layer glass of getter not only can be applied to new building, and the energy-conservation and outward appearance that can be applied to existing building is transformed, not only can wet combining but also can be cladding, compare with existing lagging material and can greatly save the engineering time, improve heat insulation and soundproof effect; Of the present invention have the composite evacuated plate of two vacuum layer glass of getter can also make sketch plate, is directly used in the production of refrigerator, refrigerator-freezer, refrigerator carriage, insulation can, refrigerator chamber, thermal container etc.
The accompanying drawing explanation
Fig. 1 is the composite evacuated plate structure schematic diagram of two vacuum layer glass that getter is arranged of the present invention.
In figure: 1. panel, 2. articulamentum, 3. vacuum chamber, 4. upholder, 5. dividing plate, 6. bleeding point, 7. solder, 8. getter.
Embodiment
Referring to accompanying drawing, the composite evacuated plate of two vacuum layer glass by getter is comprised of panel 1, articulamentum 2, vacuum chamber 3, upholder 4 and dividing plate 5, and the sheet glass that panel 1 is 2-6mm by thickness or toughened glass or coated glass or colored glazed glass or mat glass etc. form; Articulamentum 2 is resistant to elevated temperatures tackiness agent, can select the organic adhesion agent such as resistant to elevated temperatures Phenol aldehyde resin, epoxy resin glue, silicone resin glue and polyimide and inorganic adhesive commonly used or organic-inorganic composite gum stick etc. of normal temperature or hot setting; The stainless steel plate that vacuum chamber 3 is 0.15-1.0mm by thickness, stainless iron plate, electrolytic tinplate or galvanized sheet etc. are welded, and dividing plate 5 can adopt same sheet material, with vacuum chamber 3, directly welds together, and make vacuum chamber 3 form two independently vacuum layer; Upholder 4 is made by metal, pottery, glass or superpolymer, utilize the modes such as printing, printing, spraying, machinery lay to become dot matrix to be distributed on two surfaces up and down of dividing plate 5, the bearing height of upholder 4 is advisable with 0.15-1.0mm, and the diameter of point of suppon is advisable with 0.3-1.0mm; Air exhaust nozzle and sealing cover that bleeding point 6 is directly stamped out by the upper metal sheet of vacuum chamber 3 form, getter 8 is placed in bleeding point 6, place solder 7 in air exhaust nozzle as tin, zinc, magnesium and low melting point alloy thereof, solder 7 dissolves and automatically bleeding point 6 is sealed afterwards.Have the making method of the composite evacuated plate of two vacuum layer glass of getter as follows: at first two onesize electrolytic tinplates of cutting are for making vacuum chamber 3, and utilize the mode of punching press to carry out the flanging moulding and make bleeding point 6 two electrolytic tinplates, slightly a little bit smaller electrolytic tinplate of cutting is as dividing plate 5, also reserved bleed-off passage again, take the performed polymer of superpolymer by the mode of printing is printed on upholder 4 on two surfaces up and down of dividing plate 5 as raw material, three electrolytic tinplates utilize seam welding machine that it is welded together after closing sheet, carry out edge sealing; Next makes two onesize armourplate glasses as panel 1, chooses epoxy resin glue as articulamentum 2, panel 1 is sticked on by articulamentum 2 on two surfaces up and down of vacuum chamber 3 and forms composition board, and reserved bleed-off passage; Finally getter 8 and solder 7 are placed in bleeding point 6, one or composition board are in batch sent in vacuum oven, after first heating the epoxy resin adhesive curing that makes articulamentum 2, be evacuated to below 0.1Pa, temperature while vacuumizing is preferably in more than 300 ℃, to promote the activation of the interior gas purging of vacuum chamber 3 and getter, be warming up to again sealing temperature, solder 7 fusings are by bleeding point 6 self-closeds, with stove, lower the temperature, solder 7 solidifies final vacuum chamber 3 realizes airtight sealing, opens the composite evacuated plate of two vacuum layer glass that vacuum oven obtains getter; In order to protect the impact of vacuum chamber 3 and elimination heat bridge, the surrounding of vacuum chamber 3 can be smeared seal gum or structure glue; In order to protect panel 1 and to play decoration function, bleed-off passage is smeared seal gum and is decorated.
All above-mentioned these intellecture properties of primary enforcement, do not set restriction this product innovation of other forms of enforcement and/or novel method.Those skilled in the art will utilize this important information, and foregoing is revised, to realize similar implementation status.But all modifications or transformation belong to the right of reservation based on product innovation of the present invention.
The above, be only preferred embodiment of the present invention, is not the present invention to be done to the restriction of other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not break away from, any simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.
Claims (10)
1. the composite evacuated plate of two vacuum layer glass that getter is arranged, comprise panel, articulamentum and vacuum chamber, it is characterized in that described panel is sheet glass, described panel and or described articulamentum provide additional strength for described vacuum chamber, guarantee vacuum chamber planarization under atmospheric pressure, described vacuum chamber is to weld edge sealing by metal sheet under normal pressure, under vacuum, high temperature seals and the closed cavity of formation, described sealing is in vacuum oven, to utilize solder according to hydraulic seal principle automatic-sealed pre-bleeding point on vacuum chamber, getter and dividing plate are arranged in described vacuum chamber, described dividing plate forms two vacuum layer by being divided into two in described vacuum chamber, in described vacuum layer, upholder is arranged, above support be make separately or on vacuum chamber or dividing plate, directly form.
2. the composite evacuated plate of two vacuum layer glass that getter is arranged as claimed in claim 1, is characterized in that describedly having the composite evacuated plate of two vacuum layer glass of getter to comprise smooth plate, curved slab, bending plate and sketch plate.
3. the composite evacuated plate of two vacuum layer glass that getter is arranged as claimed in claim 1, is characterized in that described articulamentum is tackiness agent or plastics sheet.
4. the composite evacuated plate of two vacuum layer glass that getter is arranged as claimed in claim 1, is characterized in that, in described articulamentum, enhancement Layer or stiffener to be arranged.
5. the composite evacuated plate of two vacuum layer glass that getter is arranged as claimed in claim 1, it is characterized in that described vacuum chamber has one to several, when described vacuum chamber is two, upper and lower two vacuum chambers stack bonding along the diagonal lines dislocation of lower upper surface, make it form landing edge, the limit section heat bridge impact while installing to reduce.
6. the composite evacuated plate of two vacuum layer glass that getter is arranged as claimed in claim 1, is characterized in that described dividing plate is metal sheet, sheet glass, ceramic plate or resistant to elevated temperatures superpolymer plate.
7. the composite evacuated plate of two vacuum layer glass that getter is arranged as claimed in claim 1, is characterized in that described dividing plate can be integrally welded with the inwall of vacuum chamber, makes vacuum chamber form two independently vacuum layer; Described dividing plate also can be placed directly in vacuum chamber, makes vacuum chamber form the vacuum layer of two UNICOMs.
8. the composite evacuated plate of two vacuum layer glass that getter is arranged as claimed in claim 1, is characterized in that described welding comprises melting welding, pressure welding and soldering.
9. the composite evacuated plate of two vacuum layer glass that getter is arranged as claimed in claim 1, is characterized in that described getter automatic activation under high temperature, high vacuum in the sealing process.
10. the described making method that the composite evacuated plate of two vacuum layer glass of getter is arranged of claim 1 to 9 any one is characterized in that comprising the following steps:
The first step, make respectively two panels and two metal sheets that are used to form vacuum chamber according to shape and the size of the composite evacuated plate of two vacuum layer glass that getter is arranged of required making, two metal sheets that are used to form vacuum chamber are carried out to the flanging moulding, and make upholder and bleeding point on two metal sheets, or upholder is produced on dividing plate;
Second step, first two panels are joined together to form to composition board, also reserved bleed-off passage by articulamentum and two metal sheets respectively, the alignment of two composition boards is fastened again and weld together, put a dividing plate between two composition boards, then the peripheral weld of two metal sheets is connected together; Two metal sheet alignment that perhaps first will be used to form vacuum chamber fasten, dividing plate is placed between two metal sheets, and then peripheral weld is connected together, then are joined together to form composition board, also reserved bleed-off passage by articulamentum and two panels; Getter is placed in vacuum chamber, solder is placed in bleeding point, and composition board is sent in vacuum oven, once can send into several piece;
The 3rd step, first vacuum oven is warming up to the curing temperature of articulamentum, again vacuum oven is evacuated to below 0.1Pa, then vacuum oven is warming up to the temperature of sealing, the solder fusing is by the bleeding point self-closed, solidify and rear vacuum chamber is realized to the resistance to air loss welding with stove cooling, solder, open the composite evacuated plate of two vacuum layer glass that vacuum oven obtains getter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013102984689A CN103420623A (en) | 2013-07-17 | 2013-07-17 | Dual-vacuum-layer metal vacuum composite board provided with getter, and preparation method of same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013102984689A CN103420623A (en) | 2013-07-17 | 2013-07-17 | Dual-vacuum-layer metal vacuum composite board provided with getter, and preparation method of same |
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| CN103420623A true CN103420623A (en) | 2013-12-04 |
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| CN2013102984689A Withdrawn CN103420623A (en) | 2013-07-17 | 2013-07-17 | Dual-vacuum-layer metal vacuum composite board provided with getter, and preparation method of same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113950750A (en) * | 2019-01-31 | 2022-01-18 | 弗劳恩霍夫应用研究促进协会 | System and method for preparing a panel assembly |
| CN117286960A (en) * | 2023-11-20 | 2023-12-26 | 科美斯新材料科技发展有限公司 | Composite heat-insulating plate, heat-insulating structure wall and heat-insulating system for structure wall |
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| CN201024620Y (en) * | 2007-03-30 | 2008-02-20 | 兆宁 | Composite vacuum exterior wall thermal insulation decorative board |
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| CN201201345Y (en) * | 2008-03-21 | 2009-03-04 | 朱金龙 | Metal composite board with flame-retardant hollow grid sandwich layer |
| CN102953441A (en) * | 2012-03-21 | 2013-03-06 | 戴长虹 | Convex-sided vacuum heat-insulating board, flattened vacuum heat-insulating board and preparation methods thereof |
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| CN101042041A (en) * | 2007-03-21 | 2007-09-26 | 王汉清 | Suspending and balancing pressure type support safety vacuum glass |
| CN201024620Y (en) * | 2007-03-30 | 2008-02-20 | 兆宁 | Composite vacuum exterior wall thermal insulation decorative board |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113950750A (en) * | 2019-01-31 | 2022-01-18 | 弗劳恩霍夫应用研究促进协会 | System and method for preparing a panel assembly |
| CN117286960A (en) * | 2023-11-20 | 2023-12-26 | 科美斯新材料科技发展有限公司 | Composite heat-insulating plate, heat-insulating structure wall and heat-insulating system for structure wall |
| CN117286960B (en) * | 2023-11-20 | 2024-02-02 | 科美斯新材料科技发展有限公司 | Composite heat-insulating plate, heat-insulating structure wall and heat-insulating system for structure wall |
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