CN116787900A - Preparation method of perforated vacuum insulation panel - Google Patents
Preparation method of perforated vacuum insulation panel Download PDFInfo
- Publication number
- CN116787900A CN116787900A CN202310696022.5A CN202310696022A CN116787900A CN 116787900 A CN116787900 A CN 116787900A CN 202310696022 A CN202310696022 A CN 202310696022A CN 116787900 A CN116787900 A CN 116787900A
- Authority
- CN
- China
- Prior art keywords
- insulation panel
- vacuum insulation
- heat
- core material
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009413 insulation Methods 0.000 title claims abstract description 158
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000011162 core material Substances 0.000 claims abstract description 64
- 238000000034 method Methods 0.000 claims abstract description 39
- 238000002955 isolation Methods 0.000 claims abstract description 37
- 238000007789 sealing Methods 0.000 claims abstract description 35
- 239000011148 porous material Substances 0.000 claims abstract description 34
- 230000008569 process Effects 0.000 claims abstract description 20
- 238000004806 packaging method and process Methods 0.000 claims description 25
- 238000004519 manufacturing process Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 16
- 230000004888 barrier function Effects 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 239000006260 foam Substances 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 239000010408 film Substances 0.000 claims 13
- 239000010409 thin film Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 14
- 238000005516 engineering process Methods 0.000 abstract description 13
- 238000013461 design Methods 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 abstract description 6
- 238000009417 prefabrication Methods 0.000 abstract 1
- 239000003365 glass fiber Substances 0.000 description 8
- 239000000835 fiber Substances 0.000 description 6
- 239000012774 insulation material Substances 0.000 description 5
- 229920005830 Polyurethane Foam Polymers 0.000 description 3
- 239000004964 aerogel Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- -1 flame surfaces Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000011496 polyurethane foam Substances 0.000 description 3
- 238000005524 ceramic coating Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000002274 desiccant Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000006261 foam material Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- YAFQFNOUYXZVPZ-UHFFFAOYSA-N liproxstatin-1 Chemical compound ClC1=CC=CC(CNC=2C3(CCNCC3)NC3=CC=CC=C3N=2)=C1 YAFQFNOUYXZVPZ-UHFFFAOYSA-N 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000009461 vacuum packaging Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/04—Punching, slitting or perforating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/164—Drying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/18—Handling of layers or the laminate
- B32B38/1858—Handling of layers or the laminate using vacuum
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Thermal Insulation (AREA)
Abstract
The invention relates to a preparation method of an open pore vacuum insulation panel, which is manufactured by adopting a porous medium core material pre-opening process, and can effectively maintain the heat insulation performance of the vacuum insulation panel while opening pores; the air-isolation structure film adopts a heat sealing technology that one side is flat and one side is buckled, so that the number of folded edges is reduced, the crease leakage rate is reduced, the edge heat bridge effect is small, and the service life of the air-isolation structure film is prolonged. The core material pre-opening technology avoids the damage of the conventional opening to the vacuum insulation panel and ensures the air tightness of the vacuum insulation panel. The prefabrication of the perforated core material can also ensure the expected design of the vacuum insulation panel, and reduces the thermal bridge effect brought by conventional perforation or module splicing. Compared with the prior art, the open-pore vacuum insulation panel prepared by the preparation method can be used in heat insulation system equipment and other equipment needing to be opened, the application occasion is widened, the problems of integral air tightness and flatness of the open-pore vacuum insulation panel are solved, the service life is prolonged, and the thermal bridge influence of the integral vacuum insulation panel is reduced.
Description
Technical Field
The invention relates to the technical field of heat insulation material engineering, in particular to a preparation method of an open-pore vacuum heat insulation plate.
Background
The adoption of the high-efficiency heat insulating material is an effective way for reducing the energy consumption of the system, saving energy, reducing emission, realizing green low-carbon production and living and completing the 'double-carbon' target. The vacuum insulation panel is a novel high-efficiency environment-friendly heat insulation material, has a heat conduction coefficient as low as below 0.002W/(m.K), is a heat insulation material with optimal heat insulation performance at present, has been widely focused in the building energy conservation, household appliances, industrial chemical industry, aerospace, transportation and cold chain logistics industry, and has wide market application prospect.
The conventional vacuum insulation panel is composed of a porous medium core material, a high barrier film material which wraps the core material while maintaining the internal vacuum degree, and a gas adsorption material (getter or desiccant), and has a structure as shown in fig. 1. On one hand, the method is based on the porous medium vacuum heat insulation principle, so that the convection effect can be effectively eliminated; on the other hand, through optimizing the core material, the heat conduction is controlled in a reasonable range, and the heat transport of gas molecules and the heat radiation of solid matrixes are effectively reduced. The vacuum heat insulation plate combines two methods of vacuum heat insulation and micropore heat insulation to achieve the purpose of heat preservation and energy saving.
The vacuum insulation panel is generally made into a flat plate shape, and the size is not too small (the size is too small, the edge thermal bridge effect is aggravated, the heat insulation performance is affected, and even the vacuum insulation panel can not be disabled), and the vacuum insulation panel can not be cut, cut and perforated in the use process, and can not be bent, stretched, compressed to change the shape, the size and the like. These limitations greatly limit the application and popularization of vacuum insulation panels. With the advancement of dual carbon targets and the demand of engineering for heat insulation materials, vacuum insulation panels with open cell structures meet the market needs. At present, a method for reducing the overall size of the vacuum insulation panel or splicing modules of the vacuum insulation panel is mainly adopted to meet the requirements of special scenes. However, the two methods can aggravate the integral thermal bridge of the vacuum insulation panel due to the reduction of the size; the method of adopting the special-shaped vacuum insulation panel splicing module meets the hole scene requirement, not only increases the manufacturing procedure and cost of a single vacuum insulation panel, but also aggravates heat leakage at the splicing position, so that the heat insulation performance of the vacuum insulation panel is greatly reduced. Therefore, the vacuum insulation panel perforating technology and the vacuum insulation panel perforating method are the needs of development and development of the vacuum insulation panel. Patent CN 102095048A refers to a method for opening a glass fiber vacuum insulation panel for a glass fiber core material, but in fact, the processing technology at the opening and the added clamping groove structure can leak air from the vacuum insulation panel, damage internal vacuum, and in addition, the air-insulating structure has too many folds to form a plurality of air leakage points, so that linear edge thermal bridges are aggravated, and heat insulation performance and service life are affected.
By adopting the technology and the method, the open-pore vacuum insulation panel meeting the requirements can be conveniently produced, the integral structure of the vacuum insulation panel is not damaged, the open-pore thermal bridge effect of the vacuum insulation panel is reduced, the service life of the vacuum insulation panel is not influenced, and the vacuum insulation panel is a problem to be overcome.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a preparation method of an open-pore material vacuum insulation panel. The technology and the method can effectively avoid the damage of the internal structure and the vacuum degree of the vacuum insulation panel in the process of opening holes, and can effectively prolong the service life of the vacuum insulation panel. The invention adopts the technical means to ensure the strength of the plate and meet the engineering requirements while compensating the heat bridge loss.
The aim of the invention can be achieved by the following technical scheme:
the invention provides a preparation method of an open-pore vacuum insulation panel, which comprises the following steps:
s1, reasonably designing the specification of a vacuum insulation panel according to actual engineering requirements, wherein the specification of the vacuum insulation panel comprises the shape and the size of an opening of a porous medium core material and the thickness of the vacuum insulation panel; when determining the required thickness of the vacuum insulation panel, considering the compression ratio of the inner core material after vacuumizing to obtain the proper thickness of the inner core material;
s2, manufacturing an open-pore core material based on the specification of the designed vacuum insulation panel, comprising the following substeps:
s21, carrying out hole opening treatment on the core material;
s22, placing the porous medium core material with the holes in a pretreatment device, and heating and drying to remove residual moisture or water vapor in the core material;
s3, pre-cutting the air-isolation structure film into a rectangle according to the dimension parameters of the prefabricated perforated core material, and heat-sealing three edges of the air-isolation structure film by heat-sealing equipment to manufacture an air-isolation structure film packaging bag;
s4, after the air-isolation structure film packaging bag is manufactured, taking out the heat-dried perforated core material, then placing the perforated core material in the air-isolation structure film packaging bag, adjusting the position of the perforated core material in the air-isolation structure film packaging bag, placing the air-isolation structure film packaging bag in vacuum heat-seal packaging equipment, and placing the non-heat-sealed edges of the air-isolation structure film packaging bag on a heat seal for pressing and fixing;
s5, vacuumizing the perforated vacuum insulation panel, and heat-sealing the fourth edge, wherein the specific process is as follows:
s51, processing and trimming the peripheral edges of the air-isolation structure after heat sealing of the open-hole vacuum heat-insulating plate, and heat-sealing again by using external heat-sealing equipment under the condition that the lip edge of the fourth edge is too wide;
s52, cutting off the overlong lip of the vacuum insulation panel. The width of the preformed lip of the vacuum insulation panel is generally not less than 1 cm, preferably more than 1.5 cm.
S6, at the position of the opening of the processed vacuum heat-insulating plate, two layers of air-insulating structure films are attracted together, and the heating equipment is adopted for uniform hot-melting heat sealing, and the specific process is as follows: and opening and preheating the heat sealing device to a preheating temperature, uniformly heat-sealing the concave opening of the processed vacuum heat insulation plate, uniformly heat-sealing the two layers of gas-barrier structure films which are sucked together by hot melting, and applying a certain pressure when necessary.
S7, the perforating process follows the principle of expanding gradually from the center to the edge, firstly, the perforated shape is marked on the air-isolating structural film at the concave perforated position, then, a tool is used for mechanically perforating, the lip edge is reserved for avoiding air leakage, the width of the lip edge is generally not less than 1 cm, preferably more than 1.5 cm, and finally, the perforated vacuum insulation panel is manufactured.
Further, in step S7, the shape of the opening may be circular, square, triangular or any shape, or may be a plurality of openings on the same insulating board.
Further, the heat drying treatment may be heat drying.
The open-pore vacuum insulation panel prepared by the preparation method comprises an inner porous medium core material and an outer gas-barrier structure film; the porous medium core material is pre-perforated before packaging.
Further, the pre-opening process refers to that the porous medium core material is pre-processed into an opening with a required shape according to the process or engineering requirements, and the opening is placed into the packaging bag of the gas-barrier structure film after the pre-processing.
Further, the porous medium core material may be a fiber mat, such as a glass fiber mat, a glass fiber paper, a flame surface, a ceramic fiber mat, or a combination of several materials, or may be a particle pressing board with prefabricated holes, such as an aerogel board, or may be a foam board with holes, an extruded board, a microporous polyurethane foam board with holes, or may be a board with multiple kinds of overlapped materials.
Further, the gas barrier structure film is one or a combination of a plurality of films such as a metal film, a metal-plated composite film, a plurality of polyester-based plastic films and the like. The prefabricated air-isolation structure film bag has one flat side. As shown in fig. 3 and 4.
Further, the open-pore vacuum insulation panel can be one or a combination of a plurality of designs such as a flat plate, an arc, a round tube, a spherical crown and the like.
Further, protective materials such as snap fasteners, plastic fasteners and clamping grooves can be additionally arranged at the edge of the opening of the open-pore vacuum insulation panel.
Further, the edge of the opening of the open-pore vacuum insulation panel can be provided with a heat insulation material.
Compared with the prior art, the invention has the following beneficial effects:
1) The perforated vacuum insulation panel is manufactured by adopting a pre-perforation process, so that the heat insulation performance of the vacuum insulation panel is effectively maintained while perforation is carried out, and the service life of the perforated vacuum insulation panel is prolonged. The pre-perforating process avoids damage to the heat insulation plate caused by conventional perforating and ensures the air tightness of the heat insulation plate. The prefabricated process of the open holes can also ensure the established design (flat plate, arc, circular tube and the like) of the vacuum insulation panel, and reduce the heat bridge effect caused by the conventional open holes and module splicing; one side of the air isolation structure bag is smooth, the number of folded edges is reduced, the appearance of the heat insulation plate is smooth, air leakage points are reduced, and the air leakage probability is reduced. The technology and the method can ensure the strength and the flatness of the open-pore vacuum insulation panel.
2) Compared with the non-perforated vacuum insulation panel, the perforated vacuum insulation panel prepared by the invention has the advantages that the heat conductivity coefficient is slightly increased, but the difference value of the heat conductivity coefficients of the core material and the outer film gas-barrier structure film is reduced to a certain extent, the gradient of the difference value of the heat conductivity coefficients is reduced, the purpose of reducing the heat bridge effect is achieved, the strength of the panel is increased, the compression-resistant and fracture-resistant mechanical property of the vacuum insulation panel is improved, and the production price of the vacuum insulation panel is greatly reduced.
3) The open pore vacuum insulation panel prepared by the invention can be used in heat insulation system equipment and other equipment needing open pore. The open-pore vacuum heat-insulating plate widens the application occasions, solves the problems of air tightness and flatness of the surface of the open-pore heat-insulating plate, prolongs the service life and reduces the influence of a heat bridge of the whole heat-insulating plate.
Drawings
Fig. 1 is a schematic structural view of a conventional flat plate-shaped vacuum insulation panel.
Fig. 2 is a cross-sectional view of a conventional flat plate-shaped vacuum insulation panel.
Fig. 3 is a schematic structural view of the open-pore vacuum insulation panel according to the present invention.
Fig. 4 is a cross-sectional view of an open-celled vacuum insulation panel according to the present invention.
Fig. 5 is a schematic view of an open cell vacuum insulation panel according to the present invention without openings.
Fig. 6 is a cross-sectional view of an open cell vacuum insulation panel according to the present invention without openings.
Reference numerals illustrate:
1. the air-isolation structure heat-seals the lip edge; 2. a gas barrier structural membrane; 3. a porous dielectric core material; 4. a gas adsorbing material; 5. and (5) opening holes.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications in the shape of the openings can be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
In the technical scheme, the characteristics of preparation means, materials, structures or composition ratios and the like which are not explicitly described are regarded as common technical characteristics disclosed in the prior art.
The conception history of the applicant is as follows: the vacuum insulation panel is generally made into a flat plate shape, cannot be made into a small size (the size is too small, the edge thermal bridge is aggravated, the heat insulation performance is affected, and even the vacuum insulation panel cannot be disabled), and the vacuum insulation panel cannot be cut, cut and punched in the use process, and cannot be bent, stretched, compressed to change the shape, the size, the specification and the like; the folds of the air-isolation structure film bag are too many, and the folds can bring mechanical stress to the air-isolation structure film or cause air leakage of the air-isolation structure film, so that the risk of air leakage is increased. These limitations greatly limit the popularization and application of vacuum insulation panels. With the demand of engineering on heat insulating materials, vacuum insulation panels with open pore structures meet the market needs. At present, a method for reducing the whole size of the heat insulation plate or splicing modules of the special-shaped vacuum heat insulation plate is mainly adopted to meet the requirements of special scenes. However, the two methods can aggravate the integral thermal bridge of the vacuum insulation panel due to the reduction of the size; the method of adopting the special-shaped vacuum insulation panel splicing module meets the hole scene requirement, not only increases the manufacturing procedure and cost of a single vacuum insulation panel, but also aggravates heat leakage at the splicing position, so that the heat insulation performance of the vacuum insulation panel is greatly reduced. Therefore, how to conveniently produce the vacuum insulation panel meeting the requirements without damaging the internal structure of the vacuum insulation panel, reducing the thermal bridge effect of the perforated vacuum insulation panel and prolonging the life cycle of the perforated vacuum insulation panel is a problem to be overcome, and the applicant designs the pre-perforated vacuum insulation panel. The vacuum insulation panel mainly comprises an inner core material with pre-opened holes and an outer gas-barrier structure film. The internal core material with the preset holes can be fiber felts such as glass fiber felts, glass fiber papers, flame surfaces, ceramic fiber felts or combinations of materials, etc., particle pressed plates with the preset holes such as aerogel plates, etc., foam material plates with holes, extruded plates, porous polyurethane foam plates with holes, etc., or plates with multiple overlapped materials. The membrane material can be a metal plastic gas-barrier structure membrane, a plastic membrane, a ceramic coating film and the like. In the manufacturing process, the core material after pre-perforated pretreatment (preheating, dedusting and dehumidifying) is placed in a membrane bag with a sealed air-isolation structure on three sides, and is placed in a vacuum packaging machine together for vacuumizing. The vacuum packaging machine can fully vacuumize the inner core material, so that the outer air-isolation structure is completely attached to the surface of the inner core material. Then, reinforcing and heat-sealing the groove at the opening of the processed vacuum heat-insulating plate by using auxiliary heat-sealing equipment, then opening the air-insulating structure, and further adding protective accessories (snap fasteners and the like). The pre-perforated vacuum insulation panel is manufactured by adopting a pre-perforation process, so that the thermal bridge effect caused by conventional perforation and module splicing is reduced, the heat insulation performance of the vacuum insulation panel is effectively maintained while perforation is carried out, the thermal bridge effect is reduced, and the service life of the vacuum insulation panel is prolonged. The porous medium core material is manufactured by adopting a pre-opening process, so that the heat insulation performance of the vacuum heat insulation plate is effectively maintained while the holes are formed; the air-isolation structure film adopts a heat sealing technology that one side is flat and one side is buckled, so that the number of folded edges is reduced, the crease leakage rate is reduced, the edge heat bridge effect is small, and the service life of the air-isolation structure film is prolonged. The core material pre-opening technology avoids the damage of the conventional opening to the vacuum insulation panel and ensures the air tightness of the vacuum insulation panel. The prefabricated perforated core material can also ensure the expected design of the vacuum insulation panel, reduces the thermal bridge effect caused by conventional perforation or module splicing, can be used in heat insulation system equipment and other equipment needing perforation, widens the application occasions, solves the problems of integral air tightness and flatness of the perforated vacuum insulation panel, prolongs the service life and reduces the thermal bridge influence of the integral vacuum insulation panel.
In the following examples, the starting materials used were all commercially available.
The invention takes a round open-pore vacuum insulation panel as an embodiment, and the preparation method of the open-pore vacuum insulation panel is described with reference to figures 3 and 4, and the specific implementation steps are as follows:
s1, reasonably designing the specification of a vacuum insulation panel according to actual needs, wherein the shape of an opening of a core material is round, the dimension engineering convention is adopted, and the thickness of the vacuum insulation panel is generally 5-40mm; after the required thickness of the vacuum insulation panel is determined, the compression ratio of the porous medium core material 3 after vacuumizing is considered, so that the proper thickness of the porous medium core material 3 can be obtained;
s2, according to the size of the designed porous medium core material 3, starting to manufacture the porous medium core material 3 with holes, comprising the following substeps:
s21, carrying out opening treatment on the porous medium core material 3 to be opened to obtain an opened porous medium core material 3;
s22, placing the porous medium core material 3 with the holes in a pretreatment device, and heating and drying to remove residual moisture or water vapor in the porous medium core material 3;
s3, pre-cutting the gas-barrier structure film 2 into a rectangle according to the size parameters of the porous medium core material 3 with the prefabricated holes, and heat-sealing three edges of the gas-barrier structure film 2 by heat-sealing equipment to manufacture a packaging bag of the gas-barrier structure film 2, wherein the upper and lower two gas-barrier structure films 2 are completely cut and manufactured;
s4, after the packaging bag of the air-isolation structure film 2 is manufactured, taking out the porous medium core material 3 with the holes which are heated and dried, then placing the porous medium core material in the packaging bag of the air-isolation structure film 2, adjusting the position of the porous core material in the packaging bag of the air-isolation structure film 2, placing the packaging bag in vacuum heat-seal packaging equipment, and placing the non-heat-sealed edges of the packaging bag of the air-isolation structure film 2 on a heat seal to be pressed and fixed;
s5, vacuumizing the perforated vacuum insulation panel, and heat-sealing the fourth edge, wherein the specific process is as follows:
s51, processing and trimming the peripheral edges of the air-isolation structure after heat sealing of the open-hole vacuum heat-insulating plate, and heat-sealing again by using external heat-sealing equipment under the condition that the lip edge of the fourth edge is too wide;
s52, cutting off the overlong lip of the vacuum insulation panel. The width of the preformed lip of the vacuum insulation panel is generally not less than 1 cm, preferably more than 1.5 cm.
S6, at the position of the vacuum insulation panel opening after processing, the two layers of air-isolation structural films 2 are attracted together, and the heating equipment is adopted for uniform hot-melt heat sealing, and the specific process is as follows: and opening and preheating the heat sealing device to a preheating temperature, uniformly heat-sealing the concave opening of the processed vacuum heat insulation plate, uniformly heat-sealing the two layers of the gas-barrier structure films 2 which are sucked together by hot melting, and applying a certain pressure when necessary.
S7, marking a circular opening shape on the gas-barrier structural film 2 at the concave opening position according to the principle of gradually expanding from the center to the edge, then mechanically and circularly opening the hole by using a tool, reserving a lip (the gas-barrier structural heat-sealing lip 1) so as to avoid air leakage, and finally manufacturing the open-pore vacuum insulated panel, wherein the lip width of the gas-barrier structural heat-sealing lip 1 is generally not less than 1 cm, preferably more than 1.5 cm.
The porous medium core material 3 is provided with a gas adsorbing material 4.
One side of the air-isolation structure film 2 is of a flat design.
The porous medium core material 3 of the open pore vacuum insulation panel prepared in this embodiment may be a fiber felt, such as a glass fiber felt, glass fiber paper, flame surface, ceramic fiber felt, or a combination of several materials, or may be a particle pressing plate with prefabricated open pores, such as an aerogel plate, or may be a foam material plate with open pores, an extruded sheet, an open pore microporous polyurethane foam plate, or may be a plate with multiple superposed materials; the gas-barrier structure film 2 can be one of a metal plastic gas-barrier structure film, a plastic film and a ceramic coating film; the shape of the opening of the open-pore vacuum insulation panel is not limited to the circular opening 5, and can be any shape such as a polygon.
Comparative example
This comparative example provides a conventional vacuum insulation panel, which is composed of a porous medium core material 3, a gas barrier structure film 2 which surrounds the porous medium core material 3 while maintaining the internal vacuum degree, and a gas adsorbing material 4 (getter or desiccant), as shown in fig. 1 and 2. However, the conventional vacuum insulation panel is generally made into a flat plate shape, the middle position of the heat sealing lip 4 of the air insulation structure in the thickness direction is provided with 24 folds, the plate cannot be made too small (the size is too small, the edge heat bridge is aggravated, the heat insulation performance is affected, and even the plate cannot be disabled), and the plate cannot be cut, cut and punched in the use process, and cannot be bent, stretched, compressed to change the shape, the size and the like.
The technical key points of the perforated vacuum insulation panel of the embodiment described above are that the upper and lower air-insulating structure films (2) form an air-insulating structure film packaging bag, and the air-insulating structure film 2 on one side of the air-insulating structure film packaging bag is of a flat design, if no perforation exists (as shown in fig. 5 and 6), the number of folds is reduced to 12, the heat bridge effect and the air leakage rate effect of the folds are greatly reduced, the heat insulation performance can be improved, and the service life can be prolonged. The second technical point is that the pore-forming technology is core material pre-pore-forming and gas-barrier structure film post-treatment. The technology can be applied to the flat vacuum insulation panels, and the derivative technology after the technology is adopted can also be applied to the vacuum insulation panels such as cylindrical, square or polygonal pipelines, prismatic tables and the like.
Embodiments of the invention are described so as to enable one of ordinary skill in the art to make and use the invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (10)
1. The preparation method of the open-pore vacuum insulation panel is characterized by comprising the following steps of:
s1, reasonably designing the specification of a vacuum insulation panel according to actual engineering requirements, wherein the specification of the vacuum insulation panel comprises the shape and the size of an opening of a porous medium core material and the thickness of the vacuum insulation panel;
s2, manufacturing an open-pore porous medium core material based on the specification of the designed vacuum insulation panel, wherein the method comprises the following substeps:
s21, carrying out hole opening treatment on the core material to obtain a porous medium core material with holes;
s22, placing the porous medium core material with the holes in a pretreatment device, and heating and drying to remove residual moisture or water vapor in the core material for later use;
s3, pre-cutting the air-isolation structure film into a rectangle according to the dimension parameters of the prefabricated perforated core material, and heat-sealing three edges of the air-isolation structure film by heat-sealing equipment to manufacture an air-isolation structure film packaging bag;
s4, after the air-isolation structure film packaging bag is manufactured, taking out the heat-dried perforated core material, then placing the perforated core material in the air-isolation structure film packaging bag, adjusting the position of the perforated core material in the air-isolation structure film packaging bag, placing the air-isolation structure film packaging bag in vacuum heat-seal packaging equipment, and placing the non-heat-sealed edges of the air-isolation structure film packaging bag on a heat seal for pressing and fixing;
s5, vacuumizing the perforated vacuum insulation panel, and heat-sealing the fourth edge;
s6, at the position of the opening of the vacuum insulation panel after processing, two layers of gas-barrier structure films are attracted together, and uniform hot-melting heat sealing is carried out by adopting heating equipment;
s7, the perforating process follows the principle of expanding gradually from the center to the edge, the perforated shape is marked on the air-isolating structural film at the concave perforating position, then mechanical perforating is carried out, lips are reserved for avoiding air leakage, and finally the perforated vacuum insulation panel is manufactured.
2. The method for manufacturing an open-celled vacuum insulation panel according to claim 1, wherein in the step S1, the specification of the vacuum insulation panel is designed as follows: and determining the required thickness of the vacuum insulation panel, and obtaining the proper thickness of the inner core material by considering the compression ratio of the inner core material after vacuumizing.
3. The method for manufacturing an open-celled vacuum insulation panel according to claim 1, wherein the specific process of step S5 is as follows:
s51, processing and trimming the peripheral edges of the air-isolation structure after heat sealing of the open-hole vacuum heat-insulating plate;
s52, cutting off the overlong lip of the vacuum insulation panel.
4. A method of manufacturing an apertured vacuum insulation panel according to claim 3, wherein in step S52 the vacuum insulation panel has a preformed lip width of not less than 1 cm.
5. The method for manufacturing the open-pore vacuum insulation panel according to claim 1, wherein the specific process of S6 is as follows: and opening and preheating the heat sealing device to a preheating temperature, uniformly heat-sealing the concave opening of the processed vacuum heat insulation plate, and uniformly heat-sealing the two layers of gas-barrier structure films which are sucked together by hot melting.
6. The method of manufacturing an apertured vacuum insulation panel according to claim 1, wherein in step S7, the apertures are circular, square, triangular in shape.
7. A method of making an open cell vacuum insulation panel according to claim 1 wherein said open cell vacuum insulation panel comprises an inner porous dielectric core material and an outer gas barrier structural membrane.
8. The method of making an open-celled vacuum insulation panel of claim 1 wherein the porous dielectric core material is one or a combination of a fibrous mat, a particulate pressboard, a foam board.
9. The method of producing an open-celled vacuum insulation panel according to claim 1, wherein the gas barrier structural film is a combination of one or more of a metal thin film, a metal-plated composite film and a multilayer polyester-based plastic film.
10. The method for manufacturing an open-pore vacuum insulation panel according to claim 1, wherein a protective material is additionally arranged at the edge of the open pore vacuum insulation panel;
the protective material is a primary and secondary buckle, a plastic buckle or a clamping groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310696022.5A CN116787900A (en) | 2023-06-13 | 2023-06-13 | Preparation method of perforated vacuum insulation panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310696022.5A CN116787900A (en) | 2023-06-13 | 2023-06-13 | Preparation method of perforated vacuum insulation panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116787900A true CN116787900A (en) | 2023-09-22 |
Family
ID=88042991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310696022.5A Pending CN116787900A (en) | 2023-06-13 | 2023-06-13 | Preparation method of perforated vacuum insulation panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116787900A (en) |
-
2023
- 2023-06-13 CN CN202310696022.5A patent/CN116787900A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9833942B2 (en) | Method to create vacuum insulated cabinets for refrigerators | |
| US5157893A (en) | Compact vacuum insulation | |
| US20070243358A1 (en) | Highly Thermo and Acoustic Insulating Vacuum Panel | |
| CN101526165B (en) | PU vacuum insulation panel and preparation method thereof | |
| ATE397699T1 (en) | STABLE, MULTI-LAYER MATERIAL FOR HEAT INSULATION | |
| AU2014294744B2 (en) | Enthalpy exchanger element and method for the production | |
| JP2013532807A (en) | Vacuum insulation panel | |
| CN107781580B (en) | Production method of vacuum heat insulation plate and vacuum heat insulation plate | |
| CA2458037C (en) | Method for producing thermo-insulating cylindrical vacuum panels and panels thereby obtained | |
| WO2013065162A1 (en) | Vacuum heat insulating material, method for manufacturing same, heat retaining tank using same, and heat pump water heater | |
| AU2014294745B2 (en) | Enthalpy exchanger element and method for the production | |
| US8919598B2 (en) | Vacuum insulation panel assembly | |
| CN219912250U (en) | Perforated vacuum heat insulation plate | |
| AU2001292020B2 (en) | Improved edge insulation for vacuum insulation panels | |
| CN116787900A (en) | Preparation method of perforated vacuum insulation panel | |
| TW494207B (en) | Evacuated panel for thermal insulation of cylindrical bodies | |
| AU2001292020A1 (en) | Improved edge insulation for vacuum insulation panels | |
| CN212004800U (en) | Barrier film for vacuum insulation panel and vacuum insulation panel | |
| CN110778851B (en) | Vacuum insulation panel provided with mounting holes and free of surface damage | |
| CN201521763U (en) | Large-caliber pipeline insulating layer structure | |
| WO2013145401A1 (en) | Composite heat-insulating material, heat retention tank, and heat-pump-type hot water supply device | |
| KR102113939B1 (en) | Method for manufacturing vacuum insulated panel | |
| CN215096103U (en) | Edge-folding-free vacuum insulation panel | |
| JP6789519B2 (en) | Insulation material and structure for insulation and manufacturing method of insulation material | |
| CN209941934U (en) | Vacuum heat insulation board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |