CN114962860A - Porous sealing plate and preparation method thereof - Google Patents

Porous sealing plate and preparation method thereof Download PDF

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Publication number
CN114962860A
CN114962860A CN202210396382.9A CN202210396382A CN114962860A CN 114962860 A CN114962860 A CN 114962860A CN 202210396382 A CN202210396382 A CN 202210396382A CN 114962860 A CN114962860 A CN 114962860A
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CN
China
Prior art keywords
core material
film
sealing plate
porous sealing
porous
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CN202210396382.9A
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Chinese (zh)
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CN114962860B (en
Inventor
陈照峰
杨丽霞
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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Application filed by Nanjing University of Aeronautics and Astronautics filed Critical Nanjing University of Aeronautics and Astronautics
Priority to CN202210396382.9A priority Critical patent/CN114962860B/en
Publication of CN114962860A publication Critical patent/CN114962860A/en
Priority to GB2218128.3A priority patent/GB2621902A/en
Priority to PCT/CN2022/125799 priority patent/WO2023197548A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/028—Composition or method of fixing a thermally insulating material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/001—Joining in special atmospheres
    • B29C66/0012—Joining in special atmospheres characterised by the type of environment
    • B29C66/0014—Gaseous environments
    • B29C66/00145—Vacuum, e.g. partial vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D99/00—Subject matter not provided for in other groups of this subclass
    • B29D99/0053—Producing sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/04—Arrangements using dry fillers, e.g. using slag wool which is added to the object to be insulated by pouring, spreading, spraying or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/08—Means for preventing radiation, e.g. with metal foil
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/24—Structural elements or technologies for improving thermal insulation
    • Y02A30/242—Slab shaped vacuum insulation
    • 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
    • Y02B80/10—Insulation, e.g. vacuum or aerogel insulation

Abstract

The invention provides a porous sealing plate and a preparation method thereof, and belongs to the technical field of sealing plates. The getter is positioned in the core material, the core material is provided with openings, and the core material is inorganic powder and/or fiber; the enclosure frame is of a continuous appearance structure, is made of engineering plastics and is positioned at the periphery of the core material, the opening of the core material or at the periphery and the inner opening of the core material; the film material is an aluminum-plastic composite film, a polyimide composite film, a metallized film or an inorganic non-metal coating plastic composite film, and the surface of the core material is wrapped by the film material. Enclose the frame structure through control engineering plastics, realize the free design of complex construction porous sealing board appearance and hole structure, broken through the single unchangeable structure appearance characteristic that traditional porous sealing board vacuum seal leads to, the heat preservation that adapts to complex construction is thermal-insulated, widens its range of application, and engineering plastics enclose the roughness that the frame improves porous sealing board appearance or hole, non-deformable.

Description

Porous sealing plate and preparation method thereof
Technical Field
The invention relates to the technical field of sealing plates, in particular to a porous sealing plate and a preparation method thereof.
Background
The porous sealing plate is formed by compounding the filling core material and the protective surface layer barrier film material through vacuum packaging, can effectively avoid heat transfer caused by air convection, greatly reduces the heat conductivity coefficient, achieves ideal heat insulation effects of heat insulation, energy conservation, environmental protection and the like, and can play a great role in building heat insulation, cold chain logistics, oil and gas pipelines and aerospace heat insulation. In practical application, because the vacuum sealing structure of the porous sealing plate itself is generally only made into a regular square or rectangular plate-shaped structure, such as chinese patents CN215212018U and CN110762204B, it is difficult to make the porous sealing plate into a structure with a complicated shape, precise size or holes, which easily causes damage of the membrane material and collapse of the core material, thereby limiting the application range of the porous sealing plate, such as a solar water heater, a special-shaped pipeline and a heat distribution pipeline of low-temperature liquefied natural gas and petroleum gas, etc., or a low-temperature pipeline of a refrigerated ship and a refrigerated container, which needs to use the porous sealing plate with a complicated structure. The development of a porous sealing plate with a complex structure is urgently needed to meet the heat preservation requirement of the complex structure and adapt to heat insulation and heat preservation in different application environments.
Disclosure of Invention
In view of the above, the present invention provides a porous sealing plate and a method for manufacturing the same. The invention realizes the free design of the appearance and the inner hole structure of the porous sealing plate with the complex structure, breaks through the single and unchangeable structural appearance characteristic caused by the vacuum sealing of the traditional porous sealing plate, is suitable for the heat preservation and insulation of the complex structure and widens the application range of the complex structure.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a porous sealing plate which comprises a surrounding frame, a core material, a getter and a membrane material, wherein the getter is positioned in the core material, the core material is provided with openings, and the core material is inorganic powder and/or fibers; the enclosure frame is of a continuous appearance structure, is made of engineering plastics and is positioned at the periphery of the core material, the opening of the core material or at the periphery and the inner opening of the core material; the film material is an aluminum-plastic composite film, a polyimide composite film, a metallized film or an inorganic non-metal coating plastic composite film, and the surface of the core material is wrapped by the film material.
Preferably, the engineering plastic is nylon PA, polytetrafluoroethylene, polycarbonate, polyimide or polyurethane.
Preferably, the inner and/or outer surface of the enclosure further comprises an infrared reflective coating and/or an infrared reflective film layer.
Preferably, the getter is CaO composite powder and/or CaCl 2 And (3) composite powder.
Preferably, a hot melt adhesive film is further arranged between the enclosure frame and the film material, and the hot melt adhesive film is prepared by hot melting the film material or engineering plastics.
Preferably, the thickness of the film layer of the hot melt adhesive film is 30-100 μm, and the material is Polyethylene (PE) film, polyethylene-polyvinyl acetate copolymer (EVA) adhesive film, polyester polyethylene terephthalate (PET) adhesive film, nylon 66PA adhesive film, Polyolefin (PO) adhesive film or polyurethane type Thermoplastic Polyurethane (TPU) adhesive film.
Preferably, the mass fraction of the inorganic powder in the core material is 30-80%.
Preferably, the inorganic powder is silica nanopowder, a mixture of silica and glass fiber, a mixture of fumed silica and silica fume, a mixture of fumed silica and volcanic ash, a mixture of fumed silica and marble powder, or a mixture of fumed silica and slag powder.
The invention also provides a preparation method of the porous sealing plate in the technical scheme, which comprises the following steps:
cutting the engineering plastic plate and processing into a surrounding frame;
embedding the surrounding frame with a core material to form a composite core material structure;
packaging the composite core structure after being filled into a membrane material to obtain a semi-finished product of the sealing plate;
and after the surface of the sealing plate semi-finished product is subjected to heat sealing, removing the engineering plastics positioned in the core material and the membrane material which is not subjected to heat sealing on the outer surface of the enclosing frame to obtain the porous sealing plate.
Preferably, the heat sealing temperature is 100-500 ℃, and the pressure is 0.1-0.5 MPa.
Compared with the prior materials and the prior art, the invention has the following beneficial effects: (1) through the vacuum environment in the porous sealing plate and the opening with the micro-nano aperture of the core material, the heat transfer caused by air convection is effectively avoided, the ultralow heat conductivity is obtained, and the heat conductivity coefficient is as low as 1.6 mW/(m.K); (2) by controlling the structure of the engineering plastic enclosure frame, the free design of the appearance and the inner hole structure of the porous sealing plate with the complex structure is realized, the single and unchangeable structural appearance characteristic caused by the vacuum sealing of the traditional porous sealing plate is broken through, the heat insulation of the complex structure is adapted, and the application range of the heat insulation plate is widened; (3) the flatness of the appearance or the inner hole of the porous sealing plate is obviously improved through the engineering plastic enclosing frame, the edge is neat and precise, the roughness is small, and the porous sealing plate is not easy to deform; (4) the infrared radiation is obviously reduced through the excellent infrared reflection performance of the film material, so that the thermal conductivity is further reduced; (5) the outer surface of the enclosing frame also comprises an infrared reflection coating layer, so that the thermal conductivity is further reduced.
The invention also provides a preparation method of the porous sealing plate in the technical scheme, and the preparation method is simple and convenient to manufacture and low in cost. According to the invention, the limitation of a vacuum packaging structure is broken through by combining the preset engineering plastic fence with a heat sealing process, and the porous sealing plate with a complex structure is prepared, so that the heat preservation and insulation requirements of different structures in complex environments are met.
Drawings
FIG. 1 is a schematic plan view of the structure of embodiment 1 of the present invention;
FIG. 2 is a schematic cross-sectional view showing the structure of example 1 of the present invention;
FIG. 3 is a schematic plan view showing the structure of embodiment 2 of the present invention;
FIG. 4 is a schematic plan view showing the structure of embodiment 3 of the present invention;
in the figure: 1-an engineering plastic enclosure frame; 2-film material; 3-a getter; 4-core material.
Detailed Description
The invention provides a porous sealing plate which comprises a surrounding frame, a core material, a getter and a membrane material, wherein the getter is positioned in the core material, the core material is provided with openings, and the core material is inorganic powder and/or fibers; the enclosure frame is of a continuous appearance structure, is made of engineering plastics and is positioned at the periphery of the core material, the opening of the core material or at the periphery and the inner opening of the core material; the film material is an aluminum-plastic composite film, a polyimide composite film, a metallized film or an inorganic non-metal coating plastic composite film, and the surface of the core material is wrapped by the film material.
In the present invention, unless otherwise specified, all the raw materials used are commercially available in the art.
In the invention, the porous sealing plate comprises an enclosure frame, the shape of the enclosure frame is not particularly limited, and the porous sealing plate can be designed according to the needs of a person skilled in the art, such as a quincuncial shape.
In the present invention, the engineering plastic is preferably nylon PA, polytetrafluoroethylene, polycarbonate, polyimide or polyurethane.
In the invention, the outer surface of the enclosure frame preferably further comprises an infrared reflection coating layer. The specific composition of the infrared reflection coating layer is not particularly limited, and the infrared reflection coating layer is prepared by coating the infrared reflection coating which is well known to a person skilled in the art.
In the invention, the porous sealing plate comprises a getter, and the getter is preferably CaO composite powder and/or CaCl 2 And (3) composite powder.
In the present invention, the composite powder preferably includes one or more of a zirconium-aluminum 16 getter, a zirconium graphite getter, a zirconium-nickel getter, and a zirconium-iron-vanadium getter.
In the invention, the grain diameter of the getter is preferably 1-100 μm.
In the invention, the content of the getter in the core material is preferably 1-5 wt%.
In the present invention, the inorganic powder is preferably fumed silica, a mixture of fumed silica and silica fume, a mixture of fumed silica and volcanic ash, a mixture of fumed silica and marble powder, or a mixture of fumed silica and slag powder.
In the present invention, the mass fraction of the inorganic powder in the core material is preferably 30% to 80%.
In the present invention, the fibers are preferably flame glass fiber wool or centrifugal glass fiber wool.
In the present invention, the content of the fiber in the core material is preferably 15 to 69 wt%.
In the invention, a hot melt adhesive film is preferably further contained between the enclosure frame and the film material, the hot melt adhesive film is preferably prepared by hot melting the film material or the engineering plastic, the hot melt adhesive film is obtained by hot melting the innermost layer of the film material or the engineering plastic is preferably coated with a hot melt adhesive film material before use, and the hot melt adhesive film material is obtained by hot melting the hot melt adhesive film material.
In the invention, the thickness of the film layer of the hot melt adhesive film is preferably 30-100 μm, more preferably 50 μm, and the material is preferably Polyethylene (PE) film, polyethylene-polyvinyl acetate copolymer (EVA) adhesive film, polyester polyethylene terephthalate (PET) adhesive film, nylon 66PA adhesive film, Polyolefin (PO) adhesive film or polyurethane type Thermoplastic Polyurethane (TPU) adhesive film.
The invention also provides a preparation method of the porous sealing plate in the technical scheme, which comprises the following steps:
cutting the engineering plastic plate and processing into a surrounding frame;
embedding the surrounding frame with a core material to form a composite core material structure;
packaging the composite core structure after being filled into a membrane material to obtain a semi-finished product of the sealing plate;
and after the surface of the sealing plate semi-finished product is subjected to heat sealing, removing the engineering plastics positioned in the core material and the membrane material which is not subjected to heat sealing on the outer surface of the enclosing frame to obtain the porous sealing plate.
The invention cuts the engineering plastic plate and processes the engineering plastic plate into the enclosure frame.
When the enclosure frame is positioned in the core material hole of the core material, the engineering plastic plate is preferably cut and processed into the engineering plastic enclosure frame.
The present invention is not limited to the specific processing method, and the processing method may be a method known to those skilled in the art.
In the invention, when a hot melt adhesive film is preferably further contained between the enclosure frame and the film material, and the hot melt adhesive film is preferably prepared by hot melting the engineering plastic, the engineering plastic plate is preferably coated with a hot melt adhesive material before cutting, and the hot melt adhesive material is formed into the hot melt adhesive film through hot melting.
After the enclosure frame is obtained, the enclosure frame is embedded with the core material to form a composite core material structure. In the invention, the core material is preferably cut, holes are processed in the core material, and the shape of the core material is processed into a structure with a specific shape. In the present invention, the core material is preferably dried and then used.
According to the invention, the enclosure frame is embedded into the cut hole in the core material, or the core material is embedded into the enclosure frame to form a composite core material structure, and the position is fixed, so that the displacement is prevented.
After the composite core structure is formed, the composite core structure is packaged after being filled into a membrane material, and a semi-finished product of the sealing plate is obtained. In the present invention, the film material is preferably dried and then used.
In the present invention, the film is preferably used in the form of a film bag.
The present invention preferably encases the composite core structure in a film bag.
According to the invention, the bagged composite core material structure is preferably placed in a vacuum packaging machine, an upper pressure plate of a film material bag is used for avoiding uneven packaging, the upper and lower films of a heat seal opening are smoothed out, then a vacuum chamber cover is put down, vacuumizing is carried out to compact the cover, a heat-sealing metal strip is heated, and the metal strip conducts heat to the inner layer hot-melt adhesive film of the film material bag, so that the upper and lower layers of hot-melt adhesive films are fused and bonded.
After the packaging is finished, the sealing plate is preferably powered off and cooled, then the sealing plate is deflated into the vacuum chamber, and the cover is opened, so that the semi-finished sealing plate is obtained.
After the semi-finished product of the sealing plate is obtained, the surface of the semi-finished product of the sealing plate is subjected to heat sealing again, and the outer surface of the engineering plastic positioned in the core material and the outer surface membrane material of the enclosure frame are removed, so that the porous sealing plate is obtained.
The invention preferably finds the position of the engineering plastic on the plane of the semi-finished product of the sealing plate, carries out heat sealing on the membrane above the position of the engineering plastic, and realizes the dense bonding of the engineering plastic and the membrane through hot melting.
In the invention, the heat sealing temperature is preferably 100-500 ℃, more preferably 150-300 ℃, and the pressure is preferably 0.1-0.5 MPa, more preferably 0.2-0.3 MPa.
The invention preferably finds the position of the engineering plastic on the plane of the semi-finished product of the sealing plate, and removes the membrane material of the engineering plastic.
The invention preferably removes the membrane material which is not heat-sealed on the outer surface of the sealing plate semi-finished product enclosing frame to obtain the porous sealing plate.
In the present invention, the inner and/or outer surface of the enclosure preferably further comprises an infrared reflective coating and/or an infrared reflective film layer. The infrared-reflective coating layer is preferably formed by spraying an infrared-reflective coating material, and the infrared-reflective film layer is preferably formed by bonding an infrared-reflective film.
To further illustrate the present invention, the porous sealing plate and the method for manufacturing the same provided by the present invention will be described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
As shown in fig. 1-2, the quincunx-shaped porous sealing plate with circular holes inside is 0.01m thick, 0.5m maximum from the center to the edge of the quincunx shape, and 1cm diameter of the circular hole, and comprises a surrounding frame, a core material, a getter and a membrane material, wherein the surrounding frame has a continuous shape structure and is processed by engineering plastics, the engineering plastics are polyurethane, the number of the surrounding frames is 8, 1 of the quincunx-shaped surrounding frames is positioned on the periphery of the core material, and 7 of the circular surrounding frames are positioned in the inner hole of the core material; the core material main body is a mixture of nano silicon dioxide powder and centrifugal glass fiber cotton, the content of the nano silicon dioxide powder is 30 wt%, and the nano silicon dioxide powder is wrapped by the enclosing frame and the membrane material; the getter is CaO composite powder, the getter is placed in the core material, and the content of the getter in the core material is 3 wt%; the membrane material is a metallized membrane and is positioned on the upper surface and the lower surface of the plane of the core material; the engineering plastic is hot-melted and bonded with the membrane material through a hot-pressing technology; the outer surface of the enclosing frame is provided with an infrared reflection coating layer, and the thickness of the coating layer is 0.1 mm.
The manufacturing method comprises the following steps:
(1) cutting the engineering plastic plate and processing into 8 engineering plastic rings;
(2) drying the core material and the film material bag;
(3) cutting a core material, processing a round hole in the core material, and processing the core material into a specific quincunx structure;
(4) embedding 7 circular engineering plastic rings into the cut holes in the core material, embedding the core material into the quincunx engineering plastic rings to form a composite core material structure, fixing the position, and preventing displacement;
(5) filling the composite core structure into a film material bag;
(6) putting the bagged composite core material structure into a vacuum packaging machine, pressing a plate on a bag to avoid uneven packaging, flattening the upper and lower films of a heat seal, putting down a vacuum chamber cover, and vacuumizing to compact the cover;
(7) heating and heat-sealing the metal strip, wherein the metal strip conducts heat to the hot melt adhesive film on the inner layer of the film material to melt and bond the upper and lower hot melt adhesive films;
(8) cutting off the power and cooling, discharging the gas into a vacuum chamber, and opening the cover to form a semi-finished product of the porous sealing plate;
(9) finding the position of the engineering plastic ring on the plane of the semi-finished product of the porous sealing plate, applying high temperature and pressure on the membrane above the position of the engineering plastic ring, wherein the temperature is 150 ℃, and the pressure is 0.3MPa, and realizing the compact bonding of the engineering plastic ring and the membrane through hot melting;
(10) finding the position of the engineering plastic ring on the plane of the porous sealing plate semi-finished product, and removing a membrane material in the ring for the engineering plastic ring in the semi-finished product; and (3) removing the engineering plastic ring at the periphery of the semi-finished product, removing the heat-sealing membrane material on the outer side surface of the ring, spraying an infrared reflection coating on the outer surface of the enclosing frame to form an infrared reflection coating layer, thus obtaining the plum blossom-shaped porous sealing plate product containing the round holes in the appearance shown in figure 1, being applied to heat preservation and insulation of the side part of the pump body with the transmission shaft, and penetrating seven transmission shafts into the porous sealing plate through prefabricated inner holes without damaging the plate structure.
A layer of hot melt adhesive film is arranged at the joint of the engineering plastic enclosure frame and the film material to form a composite laminate, the thickness of the hot melt adhesive film is 50 mu m, and the hot melt adhesive film is a polyester PET (polyethylene terephthalate) adhesive film.
The heat conductivity of the porous sealing plate prepared in this example was measured by a thermal conductivity engine and found to be 3 mW/(m.K).
Example 2
As shown in fig. 3, the complex-structure porous sealing plate has a thickness of 0.02m, a top-bottom maximum of 0.5m, a left-right maximum of 0.3m, a side length of two square stacking blocks at the lower end of 0.05m, a top-bottom maximum of 0.07m of peanut-shaped holes at the upper end of 0.03m, a left-right maximum of 0.02m, and a left-right minimum of 0.02m, and is composed of a surrounding frame, a core material, a getter and a membrane material, wherein the surrounding frame has a continuous structure and is processed by engineering plastics, the engineering plastics are nylon PA, the number of the surrounding frame is 3, 1 surrounding frame is located at the periphery of the core material, and 2 surrounding frames are located in the inner opening of the core material; the core material main body is fumed silica inorganic powder and is wrapped by the surrounding frame and the membrane material; the getter is CaO composite powder, the content of the getter in the core material is 1 wt%, and the getter is placed in the core material; the film material is an aluminum-plastic composite film and is positioned on the upper surface and the lower surface of the plane of the core material; the engineering plastic is hot-melted and bonded with the membrane material through a hot-pressing technology.
The manufacturing method comprises the following steps:
(1) spraying hot melt adhesive material on the surface of the engineering plastic plate, solidifying, cutting and processing into 3 engineering plastic rings;
(2) drying the core material and the film material bag;
(3) cutting a core material, processing a hole in the core material, and processing the shape of the core material into a structure with a specific shape;
(4) embedding 2 inner frame engineering plastic rings into the cut holes in the core material, embedding the core material into the outer frame engineering plastic rings to form a composite core material structure, fixing the position, and preventing displacement;
(5) filling the composite core material structure into a film material bag, wherein the film material bag is rectangular, and one side of the film material bag is provided with an opening;
(6) putting the bagged composite core material structure into a vacuum packaging machine, pressing a plate on a bag to avoid uneven packaging, flattening the upper and lower films of a heat seal, putting down a vacuum chamber cover, and vacuumizing to compact the cover;
(7) heating the heat-sealing metal strip, and conducting heat to the hot melt adhesive film of the engineering plastic enclosure frame to melt and bond the two layers of hot melt adhesive films between the film material and the engineering plastic;
(8) cutting off the power and cooling, discharging the gas into a vacuum chamber, and opening the cover to form a semi-finished product of the porous sealing plate;
(9) finding the position of the engineering plastic ring on the plane of the semi-finished product of the porous sealing plate, applying high temperature and pressure on the membrane above the position of the engineering plastic ring, wherein the temperature is 150 ℃, and the pressure is 0.4MPa, and realizing the compact bonding of the engineering plastic ring and the membrane through hot melting;
(10) finding the position of the engineering plastic ring on the plane of the porous sealing plate semi-finished product, and removing a membrane material in the ring for the engineering plastic ring in the semi-finished product; for the engineering plastic ring at the periphery of the semi-finished product, the membrane material on the outer side of the ring is removed, and a porous sealing plate product with a complex structure as shown in figure 3 is obtained. The product is applied to heat preservation and insulation of a coffee machine instrument with a pipeline part, and a threading pipe and a water flow pipe penetrate into a porous sealing plate through a prefabricated inner hole.
A layer of hot melt adhesive film is arranged at the joint of the engineering plastic enclosure frame and the film material to form a composite laminate, the thickness of the hot melt adhesive film is 50 mu m, and the hot melt adhesive film is a Polyethylene (PE) film.
The heat conductivity of the porous sealing plate prepared in this example was measured by a thermal conductivity engine and found to be 5 mW/(m.K).
Example 3
As shown in fig. 4, the complex-structure porous sealing plate has a thickness of 0.03m, a maximum width of 1m at the left and right sides, a maximum vertical height of 0.7m at the upper and lower sides, and a top circular radius of 0.5m, and is composed of a surrounding frame, a core material, a getter and a membrane material, wherein the surrounding frame has a continuous appearance structure and is processed by engineering plastics, the engineering plastics are polyimide, and the surrounding frame is located on the periphery of the core material; the core material main body is centrifugal glass fiber cotton and is wrapped by the enclosure frame and the membrane material; the getter being CaCl 2 The composite powder comprises 5 wt% of getter in a core material, and is placed inside the core material; the film material is a polyimide composite film and is positioned on the surface of the plane of the core material; engineering plastics pass through hot pressing technique and membrane material hot melt bonding, and the surface of enclosing the frame has the infrared reflection thin layer, and thin layer thickness 0.1 mm.
The manufacturing method comprises the following steps:
(1) cutting the engineering plastic plate and processing into an engineering plastic enclosure frame;
(2) drying the core material and the film material bag;
(3) cutting a core material, wherein the shape of the core material is processed into a structure with a specific shape;
(4) embedding the core material into the engineering plastic ring to form a composite core material structure, fixing the position and preventing displacement;
(5) filling the composite core structure into a film material bag;
(6) putting the bagged composite core material structure into a vacuum packaging machine, pressing a plate on a bag to avoid uneven packaging, flattening the upper and lower films of a heat seal, putting down a vacuum chamber cover, and vacuumizing to compact the cover;
(7) heating and heat-sealing the metal strip, wherein the metal strip conducts heat to the hot melt adhesive film on the inner layer of the film material to melt and bond the upper and lower hot melt adhesive films;
(8) cutting off the power and cooling, slowly discharging the gas into the vacuum chamber, and slowly opening the cover to form a semi-finished product of the porous sealing plate;
(9) finding the position of the engineering plastic ring on the plane of the semi-finished product of the porous sealing plate, applying high temperature and pressure on the membrane above the position of the engineering plastic ring, wherein the temperature is 300 ℃, the pressure is 0.2MPa, and the engineering plastic ring and the membrane are compactly bonded by hot melting;
(10) finding the position of the engineering plastic ring on the plane of the semi-finished product of the porous sealing plate, removing the membrane material which is not subjected to heat sealing on the outer side surface of the ring, attaching an infrared reflection film to the outer surface of the engineering plastic ring to form an infrared reflection film layer, and obtaining the porous sealing plate product with the complex structure shown in figure 4.
A layer of hot melt adhesive film is arranged at the joint of the engineering plastic enclosure frame and the film material to form a composite laminate, the thickness of the hot melt adhesive film is 50 mu m, and the hot melt adhesive film is a Polyethylene (PE) film.
The heat conductivity of the porous sealing plate prepared in this example was measured by a thermal conductivity engine and found to be 1.6 mW/(m.K).
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention in any way. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the protection scope of the present invention.

Claims (10)

1. The porous sealing plate is characterized by comprising a surrounding frame, a core material, a getter and a membrane material, wherein the getter is positioned inside the core material, the core material is provided with openings, and the core material is inorganic powder and/or fibers; the enclosure frame is of a continuous appearance structure, is made of engineering plastics and is positioned at the periphery of the core material, the opening of the core material or at the periphery and the inner opening of the core material; the film material is an aluminum-plastic composite film, a polyimide composite film, a metallized film or an inorganic non-metal coating plastic composite film, and the surface of the core material is wrapped by the film material.
2. The porous sealing plate of claim 1, wherein the engineering plastic is nylon PA, polytetrafluoroethylene, polycarbonate, polyimide, or polyurethane.
3. The porous sealing sheet of claim 1 or 2, wherein the inner and/or outer surface of the enclosure further comprises an infrared reflective coating and/or an infrared reflective film layer.
4. The porous sealing sheet of claim 1, wherein the getter is CaO composite powder and/or CaCl 2 And (3) composite powder.
5. The porous sealing plate of claim 1, further comprising a hot melt adhesive film between the frame and the film, wherein the hot melt adhesive film is made of the film or engineering plastic by hot melting.
6. The porous sealing plate of claim 5, wherein the thickness of the hot melt adhesive film is 30-100 μm, and the material is polyethylene PE film, polyethylene-polyvinyl acetate EVA film, polyester PET film, nylon 66PA film, polyolefin PO film or polyurethane TPU film.
7. The porous sealing plate of claim 1, wherein the mass fraction of the inorganic powder in the core material is 30% to 80%.
8. The porous sealing plate of claim 1 or 7, wherein the inorganic powder is silica nanopowder, a mixture of silica and glass fibers, a mixture of fumed silica and silica fume, a mixture of fumed silica and volcanic ash, a mixture of fumed silica and marble powder, or a mixture of fumed silica and slag powder.
9. The method for manufacturing a porous sealing plate according to any one of claims 1 to 8, comprising the steps of:
cutting the engineering plastic plate and processing into an enclosure frame;
embedding the surrounding frame with a core material to form a composite core material structure;
packaging the composite core structure after being filled into a membrane material to obtain a semi-finished product of the sealing plate;
and after the surface of the sealing plate semi-finished product is subjected to heat sealing, removing the engineering plastics positioned in the core material and the membrane material which is not subjected to heat sealing on the outer surface of the enclosing frame to obtain the porous sealing plate.
10. The method of claim 9, wherein the heat-sealing temperature is 100 to 500 ℃ and the pressure is 0.1 to 0.5 MPa.
CN202210396382.9A 2022-04-15 2022-04-15 Porous sealing plate and preparation method thereof Active CN114962860B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023197548A1 (en) * 2022-04-15 2023-10-19 南京航空航天大学 Porous sealing plate and preparation method therefor
GB2621902A (en) * 2022-04-15 2024-02-28 Univ Nanjing Aeronautics & Astronautics Porous sealing plate and preparation method therefor

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1576678A (en) * 2003-07-04 2005-02-09 松下电器产业株式会社 Vacuum heat insulating material and machine using the same vacuum heat insulation material
EP2050884A2 (en) * 2007-10-16 2009-04-22 Porextherm-Dämmstoffe GmbH Shielded vacuum isolation panel
CN201680117U (en) * 2010-05-27 2010-12-22 福建赛特新材料有限公司 Vacuum insulation panel convenient to apply
CN102102796A (en) * 2010-03-12 2011-06-22 福建赛特新材股份有限公司 Vacuum insulation panel and manufacturing method thereof
CN107461569A (en) * 2016-06-06 2017-12-12 福建赛特新材股份有限公司 The hole-opening foaming structural member and vacuum heat-insulating plate of a kind of vacuum heat-insulating plate
CN110762204A (en) * 2019-11-05 2020-02-07 攀钢集团西昌钢钒有限公司 Porous combined sealing plate
CN111549920A (en) * 2020-05-15 2020-08-18 中国科学院合肥物质科学研究院 Core-film integrated powder core material vacuum insulation panel and preparation method thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004340197A (en) * 2003-05-14 2004-12-02 Inoac Corp Vacuum heat insulating material having through-hole
CN102102797B (en) * 2010-04-20 2013-01-23 福建赛特新材股份有限公司 Vacuum insulation panel with groove on panel surface, and manufacturing method thereof
KR101486634B1 (en) * 2012-07-03 2015-01-27 (주)엘지하우시스 Vacuum insulation panel improved explosion defect and the method for manufacturing the same
CN103574227A (en) * 2012-08-09 2014-02-12 苏州维艾普新材料有限公司 Vacuum insulated panel added with infrared reflecting layer and preparation method thereof
CN114962860B (en) * 2022-04-15 2023-06-23 南京航空航天大学 Porous sealing plate and preparation method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1576678A (en) * 2003-07-04 2005-02-09 松下电器产业株式会社 Vacuum heat insulating material and machine using the same vacuum heat insulation material
EP2050884A2 (en) * 2007-10-16 2009-04-22 Porextherm-Dämmstoffe GmbH Shielded vacuum isolation panel
CN102102796A (en) * 2010-03-12 2011-06-22 福建赛特新材股份有限公司 Vacuum insulation panel and manufacturing method thereof
CN201680117U (en) * 2010-05-27 2010-12-22 福建赛特新材料有限公司 Vacuum insulation panel convenient to apply
CN107461569A (en) * 2016-06-06 2017-12-12 福建赛特新材股份有限公司 The hole-opening foaming structural member and vacuum heat-insulating plate of a kind of vacuum heat-insulating plate
CN110762204A (en) * 2019-11-05 2020-02-07 攀钢集团西昌钢钒有限公司 Porous combined sealing plate
CN111549920A (en) * 2020-05-15 2020-08-18 中国科学院合肥物质科学研究院 Core-film integrated powder core material vacuum insulation panel and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023197548A1 (en) * 2022-04-15 2023-10-19 南京航空航天大学 Porous sealing plate and preparation method therefor
GB2621902A (en) * 2022-04-15 2024-02-28 Univ Nanjing Aeronautics & Astronautics Porous sealing plate and preparation method therefor

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