Film bag of vacuum insulated panel and vacuum insulated panel

Abstract

The utility model relates to the technical field of heat preservation materials, and provides a film bag of a vacuum insulation panel and the vacuum insulation panel, the vacuum insulation panel comprises a core material and the film bag, the film bag comprises a main film layer and a high-temperature-resistant heat-sealing layer, the high-temperature-resistant heat-sealing layer is arranged on one side of the main film layer and connected with the main film layer, and the main film layer is arranged on one side of the high-temperature-resistant heat-sealing layer. The side, away from the main film layer, of the high-temperature-resistant heat sealing layer is used for being matched with a to-be-heated core material. Wherein in the main film layer and the high-temperature-resistant heat-sealing layer, at least the melting temperature of the high-temperature-resistant heat-sealing layer is higher than the heating temperature of the to-be-heated core material. The core material is packaged in the film bag, and the high-temperature-resistant heat-sealing layer is the inner side wall of the film bag, so that the phenomenon that the film bag is melted in advance due to the heating temperature of the core material is avoided, and therefore, when the vacuum insulation panel is produced, the core material can be directly placed in the film bag, and then the core material is heated, vacuumized and packaged; therefore, heating, vacuumizing and packaging integrated forming of the vacuum heat insulation plate is achieved, and the production efficiency of the vacuum heat insulation plate can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal insulation materials, in particular to a film bag of a vacuum insulation panel and the vacuum insulation panel. Background Art

[0002] Vacuum insulation panels are usually used in refrigerators, freezers and other refrigeration equipment, and their main function is to insulate. In related technologies, vacuum insulation panels generally include core materials and film bags. During the production process of vacuum insulation panels, three processes are required: heating the core material, vacuuming, and packaging. Specifically, after the core material is heated, the core material is placed in the film bag, vacuumed, and then the sealing area of ​​the film bag is heated, melted, and fused to complete the packaging. The production efficiency of the above-mentioned vacuum insulation panels is low, and it is impossible to integrate the heating and vacuum packaging of the vacuum insulation panels. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention proposes a film bag for a vacuum insulation panel, which facilitates the integration of heating and vacuum packaging of the vacuum insulation panel, thereby improving production efficiency.

[0004] The utility model also provides a vacuum insulation panel.

[0005] The film bag of the vacuum insulation panel according to the first embodiment of the present invention includes:

[0006] Main film layer;

[0007] A high-temperature heat-resistant heat-sealing layer, the high-temperature heat-resistant heat-sealing layer being provided on one side of the main film layer, the high-temperature heat-resistant heat-sealing layer being connected to the main film layer, and the side of the high-temperature heat-resistant heat-sealing layer facing away from the main film layer being used to cooperate with the core material to be heated;

[0008] Among the main film layer and the high-temperature resistant heat-sealing layer, at least the melting temperature of the high-temperature resistant heat-sealing layer is higher than the heating temperature of the core material to be heated.

[0009] According to the film bag of the vacuum insulation panel of the embodiment of the present invention, the structure of the film bag is set as a main film layer and a high-temperature resistant heat-sealing layer. Among the main film layer and the high-temperature resistant heat-sealing layer, at least the melting temperature of the high-temperature resistant heat-sealing layer is greater than the heating temperature of the core material to be heated, which is beneficial to avoid the premature melting of the film bag due to the heating temperature of the core material. Therefore, when producing the vacuum insulation panel, the core material can be directly placed in the film bag, and then the core material can be heated, vacuumed and packaged, thereby realizing the integrated molding of heating, vacuuming and packaging of the vacuum insulation panel, which is beneficial to improving the production efficiency of the vacuum insulation panel.

[0010] According to one embodiment of the present invention, the high temperature resistant heat sealing layer is a high temperature resistant metal oxide layer.

[0011] According to one embodiment of the present invention, the thickness of the high temperature resistant heat sealing layer is 48 to 52 μm.

[0012] According to one embodiment of the present invention, the main film layer includes:

[0013] Wear-resistant layer;

[0014] a water-blocking layer, the water-blocking layer being disposed on one side of the wear-resistant layer and connected to the wear-resistant layer;

[0015] an airtight layer, the airtight layer being arranged on a side of the water-blocking layer away from the wear-resistant layer, the airtight layer being connected to the water-blocking layer;

[0016] The high-temperature resistant heat-sealing layer is provided on a side of the airtight layer away from the water-blocking layer, and the high-temperature resistant heat-sealing layer is connected to the airtight layer.

[0017] According to an embodiment of the present invention, the thickness of the wear-resistant layer is 18 to 22 μm.

[0018] According to an embodiment of the present invention, the thickness of the water-blocking layer is 10-14 μm.

[0019] According to an embodiment of the present invention, the number of layers of the water-blocking layer is set to two.

[0020] According to an embodiment of the present invention, the thickness of the airtight layer is 10-14 μm.

[0021] According to an embodiment of the present invention, a glue layer for connecting the two adjacent layers among the wear-resistant layer, the water-blocking layer and the airtight layer is provided between the two adjacent layers.

[0022] The vacuum insulation panel according to the second embodiment of the present invention comprises a core material and the film bag of the vacuum insulation panel described in the first embodiment above, wherein the core material is encapsulated in the film bag, and the high-temperature resistant heat-sealing layer is the inner side wall of the film bag.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a schematic structural diagram of the membrane bag provided in an embodiment of the present utility model.

[0026] Reference numerals:

[0027] 100, main film layer; 110, wear-resistant layer; 120, water-blocking layer; 130, airtight layer; 200, high-temperature resistant heat-sealing layer. DETAILED DESCRIPTION

[0028] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0030] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0031] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0033] In related technologies, vacuum insulation panels generally consist of a core material and a film bag. The base materials of the film bag are usually polyethylene (PE), ethylene-vinyl alcohol copolymer (EVOH), nylon (PA), polyester (PET / PEN, etc.). The production process of vacuum insulation panels requires three steps: heating the core material, vacuuming, and encapsulating. Heat sealing of vacuum insulation panels is a technology that uses temperatures and pressures around 100°C to melt and fuse the PE layer. By precisely controlling the heating and pressure conditions, an efficient and reliable sealing effect can be achieved.

[0034] However, for example, since the heating temperature of conventional organic PET core materials is around 150 degrees, the core materials are heated and heat-sealed in existing vacuum packaging machines. In related art, the melting temperature of the PE layer is lower than the heating temperature of the core materials. To prevent the PE layer from melting during the core material heating process, the core materials are usually heated first, then bagged, and then vacuumed and heat-sealed. This means that the core materials are bagged after being cooled to a certain temperature after heating. Therefore, the production efficiency of the vacuum insulation panels is low, and the heating and vacuum packaging of the vacuum insulation panels cannot be integrated.

[0035] The following combination Figure 1The film bag of the vacuum insulation panel and the vacuum insulation panel according to the embodiment of the present invention are described. In the embodiment of the present invention, the vacuum insulation panel comprises a core material and a film bag, wherein the core material is encapsulated in the film bag.

[0036] It is understandable that, referring to Figure 1 In an embodiment of the present utility model, the film bag of the vacuum insulation panel includes a main film layer 100 and a high-temperature resistant heat-sealing layer 200. The high-temperature resistant heat-sealing layer 200 is arranged on one side of the main film layer 100, and the high-temperature resistant heat-sealing layer 200 is connected to the main film layer 100. The side of the high-temperature resistant heat-sealing layer 200 facing away from the main film layer 100 is used to cooperate with the core material to be heated; wherein, between the main film layer 100 and the high-temperature resistant heat-sealing layer 200, at least the melting temperature of the high-temperature resistant heat-sealing layer 200 is greater than the heating temperature of the core material to be heated.

[0037] It should be noted that in the embodiment of the present invention, by eliminating the PE layer, the high-temperature resistant heat-sealing layer 200 and the main film layer 100 are combined into a film bag, the high-temperature resistant heat-sealing layer 200 is the inner wall of the film bag, and the high-temperature resistant heat-sealing layer 200 is adjacent to the core material. It can be understood that the inner side of the film bag is the high-temperature resistant heat-sealing layer 200, so the high-temperature resistant heat-sealing layer 200 is in contact with the core material.

[0038] According to the film bag of the vacuum insulation panel of the embodiment of the present invention, the structure of the film bag is set as a main film layer 100 and a high-temperature resistant heat sealing layer 200. Among the main film layer 100 and the high-temperature resistant heat sealing layer 200, at least the melting temperature of the high-temperature resistant heat sealing layer 200 is greater than the heating temperature of the core material to be heated, which is beneficial to avoid the premature melting of the film bag due to the heating temperature of the core material. Therefore, when producing the vacuum insulation panel, the core material can be directly placed in the film bag, and then the core material can be heated, vacuumed and packaged, thereby realizing the integrated molding of heating, vacuuming and packaging of the vacuum insulation panel, which is beneficial to improving the production efficiency of the vacuum insulation panel.

[0039] Specifically, it should be noted that in the embodiments of the present invention, the melting temperatures of both the main film layer 100 and the high-temperature heat-resistant heat-sealing layer 200 are greater than the heating temperature of the core material to be heated, which helps prevent the film bag from prematurely melting due to the heating temperature of the core material. Alternatively, in some embodiments, depending on the heating method, only the melting temperature of the high-temperature heat-resistant heat-sealing layer 200 may be greater than the heating temperature of the core material to be heated, which is not limited here.

[0040] It can be understood that in the embodiments of the present invention, for example, when the heating temperature of the conventional organic PET core material is around 150 degrees, the melting temperature of the composite high-temperature resistant heat sealing layer 200 is selected to be greater than 150 degrees and less than 300 degrees. The core material is placed in a film bag for heating, and in the subsequent packaging process, the heat sealing temperature is increased to above 300 degrees for 10 to 14 seconds to melt and fuse the high-temperature resistant heat sealing layer 200, thereby realizing the sealing operation, and realizing the heating, vacuuming, and packaging of the vacuum insulation panel in a vacuum packaging machine as an integrated molding.

[0041] Specifically, in this embodiment of the present invention, the high-temperature heat-seal layer 200 is a high-temperature-resistant metal oxide layer, which exhibits a certain degree of stability and structural strength. It is understood that the metal oxide can be zirconium oxide, but other metal oxides are also possible, without limitation. In this embodiment of the present invention, a high-temperature-resistant metal oxide layer (such as zirconium oxide) can be laminated onto the main film layer 100 using methods such as vacuum sputtering. Other methods, such as adhesive bonding, are also possible, without limitation.

[0042] It should be noted that, according to those skilled in the art, the melting temperature value of the high-temperature resistant metal oxide layer, such as zirconium oxide, can be adjusted by adopting the corresponding ratio so that the melting temperature of the high-temperature resistant heat sealing layer 200 is greater than the heating temperature of the core material. Therefore, the corresponding ratio is not elaborated here.

[0043] Of course, in some embodiments, the above-mentioned high-temperature resistant heat sealing layer 200 can not only be made of the corresponding ratio of zirconium oxide material, but the high-temperature resistant heat sealing layer 200 can also be made of vapor-deposited silicon carbide powder material. The vapor-deposited silicon carbide powder is also used in the corresponding ratio according to those skilled in the art. Therefore, the corresponding ratio is not elaborated here.

[0044] It should also be noted that in the embodiment of the present invention, depending on the requirements of the heating temperature, for example, the core material heating temperature can be 150 degrees or 200 degrees, etc., the high-temperature resistant heat sealing layer 200 is not limited to a single material of high-temperature heat sealing layer material, it can be one type or a combination of multiple types, which is not limited here.

[0045] It is understandable that, in the embodiment of the present invention, the thickness of the high temperature resistant heat sealing layer 200 is 48-52 μm, such as 48 μm, 50 μm or 52 μm, which is specifically set according to actual needs.

[0046] It is understandable that, referring to Figure 1In an embodiment of the present invention, the main film layer 100 includes a wear-resistant layer 110, a water-blocking layer 120 and an airtight layer 130. The water-blocking layer 120 is arranged on one side of the wear-resistant layer 110 and is connected to the wear-resistant layer 110. The airtight layer 130 is arranged on a side of the water-blocking layer 120 away from the wear-resistant layer 110 and is connected to the water-blocking layer 120. The high-temperature resistant heat-sealing layer 200 is arranged on a side of the airtight layer 130 away from the water-blocking layer 120 and is connected to the airtight layer 130.

[0047] Through the above structure, the use of the wear-resistant layer 110 is beneficial to preventing puncture, protecting the core material from wear and tear, and extending the service life of the vacuum insulation panel; the use of the water-blocking layer 120 prevents moisture or other liquids from penetrating into the interior of the vacuum insulation panel, protects the internal structure from water vapor, and maintains stability and functionality; the use of the airtight layer 130 prevents the penetration of gas or odor and maintains the sealing of the vacuum insulation panel. Therefore, the main membrane layer 100 provides comprehensive protection, including physical wear, moisture penetration and gas exchange, through the combination of three functional layers. It is suitable for material protection in complex environments and improves reliability.

[0048] Specifically, in the embodiment of the present invention, an adhesive layer is provided between adjacent layers of the wear-resistant layer 110, the water-blocking layer 120, and the airtight layer 130 to connect them. The adhesive layer provides strong adhesion, tightly binding the different functional layers together to form a whole, thereby improving the overall performance of the film bag.

[0049] It should be noted that, in the embodiments of the present invention, depending on the different core material heating methods, when the core material heating process does not affect the main film layer 100, the melting temperature of the main film layer 100 can be lower than the heating temperature of the core material, or it can be higher than the heating temperature of the core material; however, when the core material heating process affects the main film layer 100, it is necessary to set the melting temperatures of both the main film layer 100 and the high-temperature resistant heat sealing layer 200 to be higher than the heating temperature of the core material. Therefore, the melting temperature of the adhesive layer also needs to be higher than the heating temperature of the core material. For example, in this embodiment, when the heating temperature of the core material is around 150 degrees, similarly, the melting temperature of the main film layer 100 and the melting temperature of the adhesive layer can both be set to be higher than 150 degrees.

[0050] It should also be noted that in some embodiments of the present invention, for some smooth or non-stick material layers, the surface roughness can be increased by grinding or some textures, such as concave and convex patterns, can be added to increase the bonding area of ​​the adhesive layer. It is understood that the adhesive layer can be made of any one of organic silicone glue, polyurethane glue, epoxy glue, or a combination of two.

[0051] Of course, in some embodiments, two adjacent layers among the wear-resistant layer 110 , the water-blocking layer 120 and the airtight layer 130 may be connected by other methods, such as hot-melt bonding, etc., which are not limited here.

[0052] Specifically, in the embodiment of the present invention, the thickness of the wear-resistant layer 110 is 18-22 μm, such as 18 μm, 20 μm or 22 μm, and is set according to actual needs.

[0053] Specifically, in the embodiment of the present invention, the thickness of the water-blocking layer 120 is 10-14 μm, such as 10 μm, 12 μm or 14 μm, and is set according to actual needs.

[0054] Specifically, in the embodiment of the present invention, the number of layers of the water-blocking layer 120 is set to two to further improve the water-blocking performance. Of course, in some embodiments, the number of layers of the water-blocking layer 120 can also be one layer, three layers, etc., which is not limited here.

[0055] Specifically, in the embodiment of the present invention, the thickness of the airtight layer 130 is 10-14 μm, such as 10 μm, 12 μm or 14 μm, and is set according to actual needs.

[0056] It should be noted that, in the embodiment of the present utility model, the wear-resistant layer 110 is a PA (nylon) material layer. Figure 1 , PA20 is a PA (nylon) material layer with a thickness of 20 μm; the main body of the water-blocking layer 120 is a polyester (PET / PEN, etc.) material layer, and the airtight layer 130 is an EVOH (ethylene-vinyl alcohol copolymer) material layer.

[0057] Specifically, in the embodiment of the present invention, it can be understood that, in the embodiment of the present invention, a very thin aluminum film can be plated on the outside of the polyester to obtain the water-blocking layer 120. Figure 1 The aluminum film can be 1 μm thick, and VMPET12 is a polyester aluminum-coated film layer with a thickness of 12 μm. Of course, in some embodiments, the water-blocking layer 120 can also include polyester and metal aluminum foil. Alternatively, in some embodiments, the water-blocking layer 120 can also be a composite of either copper foil or silver foil with polyester, which is not limited here.

[0058] Specifically, in the embodiment of the present invention, it can be understood that, in the embodiment of the present invention, a thin layer of aluminum film can be plated on the outside of the EVOH (ethylene-vinyl alcohol copolymer) material to obtain the airtight layer 130. Figure 1The aluminum film can be 1μm thick, and VM-EVOH12 is a 12μm thick EVOH (ethylene-vinyl alcohol copolymer) aluminum film layer. Of course, in some embodiments, the airtight layer 130 can also include EVOH (ethylene-vinyl alcohol copolymer) material and aluminum foil. Alternatively, in some embodiments, it can be a composite of either copper foil or silver foil with EVOH (ethylene-vinyl alcohol copolymer), without limitation.

[0059] Similarly, in some embodiments, the wear-resistant layer 110 can be formed by coating the exterior of PA (nylon) material with a very thin aluminum film. In this embodiment of the present invention, the aluminum film can be 1 μm thick. In some embodiments, the wear-resistant layer 110 can also include PA (nylon) material and aluminum foil. Alternatively, in some embodiments, the wear-resistant layer 110 can be formed by combining either copper foil or silver foil with PA (nylon) material, without limitation.

[0060] It should be noted that the material, number of composite layers and thickness of the above-mentioned main film layer 100 are not limited here. For example, in some embodiments, the above-mentioned main film layer 100 can also be formed by a CF (carbon fiber) material layer with a thickness of 12μm, a PA (nylon) material layer with a thickness of 20μm and an EVOH (ethylene-vinyl alcohol copolymer) material layer with a thickness of 12μm in combination with aluminum plating, which is not limited here.

[0061] Finally, it should be noted that the above embodiments are intended only to illustrate the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art will appreciate that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and are intended to be covered by the scope of protection of the present invention.

Claims

1. A film bag for a vacuum insulation panel, characterized in that: include: Main film layer; A high-temperature heat-resistant heat-sealing layer, the high-temperature heat-resistant heat-sealing layer being provided on one side of the main film layer, the high-temperature heat-resistant heat-sealing layer being connected to the main film layer, and the side of the high-temperature heat-resistant heat-sealing layer facing away from the main film layer being used to cooperate with the core material to be heated; Among the main film layer and the high-temperature resistant heat-sealing layer, at least the melting temperature of the high-temperature resistant heat-sealing layer is higher than the heating temperature of the core material to be heated.

2. The film bag of the vacuum insulation panel according to claim 1, characterized in that: The high temperature resistant heat sealing layer is a high temperature resistant metal oxide layer.

3. The film bag of the vacuum insulation panel according to claim 1 or 2, characterized in that: The thickness of the high-temperature resistant heat-sealing layer is 48 to 52 μm.

4. The film bag of the vacuum insulation panel according to claim 1, characterized in that The main film layer comprises: Wear-resistant layer; a water-blocking layer, the water-blocking layer being disposed on one side of the wear-resistant layer and connected to the wear-resistant layer; an airtight layer, the airtight layer being arranged on a side of the water-blocking layer away from the wear-resistant layer, the airtight layer being connected to the water-blocking layer; The high-temperature resistant heat-sealing layer is provided on a side of the airtight layer away from the water-blocking layer, and the high-temperature resistant heat-sealing layer is connected to the airtight layer.

5. The film bag of the vacuum insulation panel according to claim 4, characterized in that: The wear-resistant layer has a thickness of 18 to 22 μm.

6. The film bag of the vacuum insulation panel according to claim 4, characterized in that: The thickness of the water-blocking layer is 10 to 14 μm.

7. The film bag of the vacuum insulation panel according to claim 6, characterized in that: The number of layers of the water-blocking layer is set to two.

8. The film bag of the vacuum insulation panel according to claim 4, characterized in that: The thickness of the airtight layer is 10 to 14 μm.

9. The film bag of the vacuum insulation panel according to any one of claims 4 to 8, characterized in that: An adhesive layer for connecting the two adjacent layers among the wear-resistant layer, the water-blocking layer and the airtight layer is provided between the two adjacent layers.

10. A vacuum insulation panel, characterized in that: include: core material; The film bag of the vacuum insulation panel according to any one of claims 1 to 9, wherein the core material is encapsulated in the film bag, and the high-temperature resistant heat-sealing layer is the inner wall of the film bag.

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