Barrier film, vacuum insulation panel and preparation method and application of vacuum insulation panel

Abstract

The invention relates to a barrier film which comprises a barrier film body, the barrier film body is formed by compounding a high polymer material layer and an aluminum layer, and at least one side surface of the barrier film body is the aluminum layer; the bonding layer is arranged on the edge of the surface of the side, which is the aluminum layer, of the barrier film body, and the material of the bonding layer is ethylene acrylic acid copolymer. According to the barrier film, the ethylene-acrylic acid copolymer is selected as the material of the bonding layer, the affinity between the ethylene-acrylic acid copolymer and aluminum is extremely high, the bonding layer is only arranged on the edge of the surface of the side, which is the aluminum layer, of the barrier film body, so that a good bonding effect is achieved, and meanwhile, the material consumption of the bonding layer is reduced; therefore, the cost is reduced, and the thermal bridge effect is weakened.

Description

Technical Field

[0001] This application relates to thermal insulation materials, and particularly to vacuum thermal insulation materials. Background Art

[0002] A vacuum insulation panel is a product formed by laminating a vacuum insulation core material with a highly airtight barrier film. The barrier film forms a containment space, usually at low pressure, to hold the vacuum insulation panel, and the rigidity of the vacuum insulation panel itself resists atmospheric pressure to support this containment space. Since the air pressure in the containment space is low and there are few air molecules, and the vacuum insulation core material can also hinder the movement of its own molecules, this effectively avoids heat transfer caused by air convection and greatly reduces the thermal conductivity. Vacuum insulation panels are widely used in cold chain equipment, building exterior wall insulation, refrigerated containers, medical insulation boxes and other fields.

[0003] The barrier film is a barrier that prevents the vacuum insulation panel from exchanging gas and moisture with the outside world, which can ensure the vacuum degree inside the vacuum insulation panel and maintain the stability of the performance of the vacuum insulation panel. The barrier film is generally a composite film of a polymer material film and an aluminum film. The polymer material film provides basic mechanical strength, high flexibility and certain gas and water barrier properties, while the aluminum film can provide strong gas and water barrier properties. The barrier film is generally made into a bag body by heat-sealing the edges through a heat-meltable adhesive material (i.e., heat-sealing material) by heat treatment (this process is abbreviated as heat-sealing). After the internal space of the bag body is evacuated, the vacuum insulation core material is loaded. The heat-sealing material covers one side surface of the barrier film in the form of a heat-sealing layer and adheres to the vacuum insulation core material and the barrier films on both sides thereof. Usually, the heat-sealing of the barrier film is the last link in the production process of the vacuum insulation panel, and the heat-sealing quality has an important impact on the product performance. Currently, the main heat-sealing materials are low-crystallization-point polyethylene or polypropylene materials. The heat-sealing material itself is generally the weakest in the composite film. Research shows that the penetration of water vapor mainly occurs at the sealed edge, which causes a decrease in the vacuum degree of the vacuum insulation panel.

[0004] Currently, due to the insufficient adhesion of the heat-sealing material itself, one side surface of the barrier film needs to be entirely covered with a layer of heat-sealing material, which results in a high cost and a strong heat bridge effect, and has a certain impact on the heat insulation ability of the barrier film. Summary of the Invention

[0005] This application provides a barrier film, a vacuum insulation panel, and their preparation methods and applications to solve the technical problems of the existing heat-sealing materials having a strong heat bridge effect and a high cost.

[0006] In a first aspect, an embodiment of this application provides a barrier film, which includes:

[0007] A barrier film body, which is formed by laminating a polymer material layer and an aluminum layer, and at least one side surface of the barrier film body is an aluminum layer;

[0008] An adhesive layer, the adhesive layer is provided at the edge of one side surface of the barrier film body where the layer is aluminum, and the material of the adhesive layer is ethylene acrylic copolymer.

[0009] In this application, by selecting ethylene acrylic copolymer as the material of the adhesive layer, since the affinity between ethylene acrylic copolymer and aluminum is extremely strong, the adhesive layer described in this application only needs to be provided at the edge of one side surface of the barrier film body where the layer is aluminum to have a good bonding effect. At the same time, due to the reduction in the amount of material used for the adhesive layer, the cost is reduced and the thermal bridge effect is weakened.

[0010] In some embodiments of this application, the material of the polymer material layer is at least one of nylon, polyester, polyvinylidene chloride, and polyethylene.

[0011] In some embodiments of this application, the polymer material layer includes a first polymer material layer, a second polymer material layer, and a third polymer material layer, the aluminum layer includes a first aluminum layer and a second aluminum layer, and the first polymer material layer, the second polymer material layer, the first aluminum layer, the third polymer material layer, and the second aluminum layer are sequentially stacked.

[0012] In some embodiments of this application, the material of the first polymer material layer is at least one of polyethylene terephthalate and nylon; and / or,

[0013] The material of the second polymer material layer is at least one of polyethylene terephthalate and nylon; and / or,

[0014] The material of the third polymer material layer is at least one of polyethylene terephthalate and nylon.

[0015] In some embodiments of this application, the material of the first polymer material layer is nylon, the material of the second polymer material layer is polyethylene terephthalate, and the material of the third polymer material layer is polyethylene terephthalate.

[0016] In some embodiments of this application, the thickness of the first polymer material layer is 10 - 20 μm; and / or,

[0017] The thickness of the second polymer material layer is 10 - 20 μm; and / or,

[0018] The thickness of the third polymer material layer is 10 - 20 μm; and / or,

[0019] The thickness of the first aluminum layer is 10 - 100 nm; and / or,

[0020] The thickness of the second aluminum layer is 10 - 100 nm; and / or,

[0021] The thickness of the adhesive layer is 30 to 60 μm.

[0022] In some embodiments of the present application, a release paper is further provided on the surface of the bonding layer.

[0023] In a second aspect, an embodiment of the present application provides a vacuum insulation panel, which includes:

[0024] The barrier film and the barrier film body according to any one of the embodiments of the first aspect;

[0025] A vacuum insulation core material,

[0026] Wherein, the barrier film and the barrier film body are oppositely arranged, and the edges of the barrier film and the barrier film body are bonded by the heat-sealing layer, enclosed into a bag shape to form a barrier bag, and the vacuum insulation core material is contained in the barrier bag and evacuated.

[0027] In some embodiments of the present application, the material of the vacuum insulation core material includes at least one of silica powder, perlite powder, polyurethane foam, polystyrene foam, glass fiber, ceramic fiber, and polymer fiber.

[0028] In a third aspect, an embodiment of the present application provides a method for preparing the vacuum insulation panel according to any one of the embodiments of the second aspect, and the preparation method includes the following steps:

[0029] Provide the barrier film and the barrier film body according to any one of the embodiments of the first aspect;

[0030] Arrange the barrier film on one side surface of the adhesive layer and the side surface of the barrier film body that is an aluminum layer to be oppositely arranged;

[0031] Bond the barrier film and the barrier film body, and perform hot pressing on the adhesive layer part of the barrier film except for one of its sides, so that the barrier film and the barrier film body are bonded to each other and form a barrier bag with an opening at the side of the barrier film;

[0032] Provide a vacuum insulation core material, and load the vacuum insulation core material into the barrier bag through the opening;

[0033] Evacuate the barrier bag through the opening;

[0034] Perform hot pressing on the adhesive layer at the side of the barrier film, so that all the edges of the barrier film and the barrier film body are bonded to each other to obtain the vacuum insulation panel.

[0035] In some embodiments of the present application, a release paper is further provided on the surface of the adhesive layer,

[0036] Before bonding the barrier film and the barrier film body, first peel off the release paper on the surface of the adhesive layer of the barrier film except for one side edge thereof; the release paper at the one side edge of the barrier film is peeled off after the vacuum insulation core material is loaded into the barrier bag.

[0037] Fourthly, an embodiment of the present application provides an application of a vacuum insulation panel. The vacuum insulation panel is the vacuum insulation panel described in any embodiment of the second aspect or the vacuum insulation panel prepared by the method described in any embodiment of the third aspect. The vacuum insulation panel is applied to a refrigeration device or a heat preservation device. Description of the Drawings

[0038] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0040] Figure 1 It is a schematic structural diagram of a barrier film provided by an embodiment of the present application. Detailed Embodiments

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0042] Unless otherwise specifically stated, the terms used herein should be understood as having the meanings commonly used in the art. Therefore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as the general understanding of those skilled in the art to which the present application belongs. In case of conflict, this specification prevails.

[0043] Unless otherwise specifically stated, various raw materials, reagents, instruments, and equipment used in the present application can be obtained through the market or prepared by existing methods.

[0044] In the technical field of vacuum insulation panels, the existing heat-sealing materials have the technical problems of strong heat bridge effect and high cost.

[0045] The technical solutions provided by the embodiments of the present application to solve the above technical problems generally have the following ideas:

[0046] In a first aspect, the embodiments of the present application provide a barrier film. Please refer to Figure 1 , the barrier film includes:

[0047] A barrier film body, which is formed by laminating a polymer material layer and an aluminum layer, and at least one side surface of the barrier film body is an aluminum layer;

[0048] An adhesive layer, which is arranged at the edge of the side surface of the barrier film body that is the aluminum layer, and the material of the adhesive layer is ethylene acrylic copolymer.

[0049] It should be noted that the barrier film body has two side surfaces, and at least one of the side surfaces is an aluminum layer. The adhesive layer should be arranged on the aluminum layer. When both side surfaces of the barrier film body are aluminum layers, the adhesive layer can be arranged on any one of its side surfaces.

[0050] It is easy to understand that ethylene acrylic copolymer (EAA) is a polymer with thermoplasticity and extremely high adhesiveness, and has a very strong affinity with aluminum. Due to the extremely strong affinity between ethylene acrylic copolymer and aluminum, compared with the traditional polyethylene or polypropylene heat-sealing layer, the adhesive layer of the present application has extremely strong adhesive force, so it does not need to cover the entire side surface of the barrier film, but is only arranged at the edge of the side surface of the barrier film body that is the aluminum layer. While having a good adhesive effect, it also reduces the material consumption of the adhesive layer, thereby reducing the cost and weakening the thermal bridge effect.

[0051] In the present application, by selecting ethylene acrylic copolymer as the material of the adhesive layer, due to the extremely strong affinity between ethylene acrylic copolymer and aluminum, the adhesive layer of the present application only arranged at the edge of the side surface of the barrier film body that is the aluminum layer has a good adhesive effect, and at the same time, due to the reduction of the material consumption of the adhesive layer, the cost is reduced and the thermal bridge effect is weakened.

[0052] In some embodiments of the present application, the material of the polymer material layer is at least one of nylon, polyester, polyvinylidene chloride, and polyethylene.

[0053] Nylon has high mechanical strength and toughness, good chemical stability, and good weather resistance. The final application scenario of the barrier film is usually as part of a vacuum insulation panel used in a thermal insulation device. Some thermal insulation devices need to maintain a low temperature, while others need to maintain a relatively high temperature. The advantage of nylon's good weather resistance makes it very suitable for the barrier film. Polyester is the general term for polymers obtained by polycondensation of polyols and polyacids. It mainly includes linear thermoplastic resins such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polyarylate. The main chain link of polyester contains an ester group, which endows it with a series of unique properties. Polyester materials usually have excellent wear resistance, corrosion resistance, strength, toughness, and hardness. Polyvinylidene chloride has properties such as flame resistance, corrosion resistance, and good airtightness, and is widely used as a film. It is currently commonly used in fields such as composite films, food packaging, cigarette outer packaging, military product packaging, pharmaceutical blister packaging, and aluminum foil lamination. Polyethylene is one of the most common polymer materials, with good flexibility, extensibility, and easy processability. Its chemical stability is relatively good, and it is resistant to alkalis and general organic solvents.

[0054] In some embodiments of the present application, the polymer material layer includes a first polymer material layer 1, a second polymer material layer 2, and a third polymer material layer 4, and the aluminum layer includes a first aluminum layer 3 and a second aluminum layer 5. The first polymer material layer 1, the second polymer material layer 2, the first aluminum layer 3, the third polymer material layer 4, and the second aluminum layer 5 are sequentially stacked.

[0055] First polymer material layer 1: As the starting layer of the entire structure, it provides good adhesion, insulation, or other specific physical and chemical properties to the subsequent layers. Second polymer material layer 2: Immediately following the first polymer material layer, it plays a role in further enhancing the structural stability, protecting the inner layer, or adjusting the overall material properties. First aluminum layer 3: Located above the second polymer material layer, it is used to provide electrical conductivity, shield electromagnetic waves, or increase the strength of the structure. Third polymer material layer 4: As the spacer or protective layer between the aluminum layers, the third polymer material layer helps prevent direct contact between the aluminum layers, reduces the risk of short circuits, and provides additional structural support or insulation performance. Second aluminum layer 5: As the top layer of the structure, the second aluminum layer may further enhance the overall electrical conductivity or shielding performance. The beneficial effect of the sequential stacking of the first polymer material layer 1, the second polymer material layer 2, the first aluminum layer 3, the third polymer material layer 4, and the second aluminum layer 5 is that the multi-layer polymer materials can provide various properties such as flexibility, toughness, and barrier properties, while the aluminum material can provide a strong barrier property. The composite of the multi-layer polymer materials and the aluminum material can avoid the problem of strong plasticity of the aluminum material through the flexibility and toughness of the polymer materials in terms of mechanical properties, and at the same time, the water and gas barrier capabilities of each layer are integrated to obtain excellent barrier properties.

[0056] In some embodiments of the present application, the material of the first polymer material layer 1 is at least one of polyethylene terephthalate and nylon; and / or,

[0057] the material of the second polymer material layer 2 is at least one of polyethylene terephthalate and nylon; and / or,

[0058] the material of the third polymer material layer 4 is at least one of polyethylene terephthalate and nylon.

[0059] Polyethylene terephthalate has advantages such as light weight, high strength, high chemical resistance, barrier properties, and low price, and is widely used in the packaging field (such as beverage bottles, food packaging, etc.), the construction field (such as sound insulation materials, heat insulation materials, etc.), and the electronic field (such as capacitor films, flexible circuit boards, etc.). Selecting the materials of the first polymer material layer 1, the second polymer material layer 2, and the third polymer material layer 4 from at least one of polyethylene terephthalate and nylon has both mechanical strength, toughness, and certain barrier properties, and has excellent performance.

[0060] In some embodiments of the present application, the material of the first polymer material layer 1 is nylon, the material of the second polymer material layer 2 is polyethylene terephthalate, and the material of the third polymer material layer 4 is polyethylene terephthalate.

[0061] It is easy to understand that nylon can provide high mechanical strength and toughness for the barrier film, and polyethylene terephthalate can provide relatively high mechanical strength, toughness, and barrier properties for the barrier film.

[0062] In some embodiments of the present application, the thickness of the first polymer material layer 1 is 10 - 20 μm; and / or,

[0063] the thickness of the second polymer material layer 2 is 10 - 20 μm; and / or,

[0064] the thickness of the third polymer material layer 4 is 10 - 20 μm; and / or,

[0065] the thickness of the first aluminum layer 3 is 10 - 100 nm; and / or,

[0066] the thickness of the second aluminum layer 5 is 10 - 100 nm; and / or,

[0067] the thickness of the adhesive layer 6 is 30 - 60 μm.

[0068] The beneficial effect of the thicknesses of the first polymer material layer 1, the second polymer material layer 2, and the third polymer material layer 4 being in the above ranges is that it can not only ensure that the barrier film has relatively high strength but also enable the barrier film to maintain relatively high flexibility.

[0069] The beneficial effects of the thicknesses of the first aluminum layer 3 and the second aluminum layer 5 being within the above ranges are that it can not only ensure that the barrier film has high sealing performance, but also make the barrier film have high flexibility.

[0070] The beneficial effect of the thickness of the adhesive layer 6 being 30 - 60 μm is that while ensuring the bonding effect, its thickness is reduced as much as possible to weaken the thermal bridge effect.

[0071] As an example, the thickness of the first polymer material layer 1 can be 10 μm, 12 μm, 14 μm, 16 μm, 18 μm, 20 μm.

[0072] As an example, the thickness of the second polymer material layer 2 can be 10 μm, 12 μm, 14 μm, 16 μm, 18 μm, 20 μm.

[0073] As an example, the thickness of the third polymer material layer 4 can be 10 μm, 12 μm, 14 μm, 16 μm, 18 μm, 20 μm.

[0074] As an example, the thickness of the first aluminum layer 3 can be 10 nm, 20 nm, 40 nm, 60 nm, 80 nm, 100 nm.

[0075] As an example, the thickness of the second aluminum layer 5 can be 10 nm, 20 nm, 40 nm, 60 nm, 80 nm, 100 nm.

[0076] As an example, the thickness of the adhesive layer 6 can be 30 μm, 40 μm, 50 μm, 60 μm.

[0077] In some embodiments of the present application, a release paper 7 is further provided on the surface of the bonding layer.

[0078] It is easy to understand that the release paper 7 can prevent the barrier film from being accidentally adhered to other substances during transportation, or adhered to dust, which affects the bonding effect of the bonding layer.

[0079] In a second aspect, an embodiment of the present application provides a vacuum insulation panel, which includes:

[0080] The barrier film and the barrier film body according to any one of the embodiments in the first aspect;

[0081] A vacuum insulation core material,

[0082] wherein, the barrier film and the barrier film body are oppositely arranged, and the edges of the barrier film and the barrier film body are bonded by the heat-sealing layer, enclosed to form a bag shape and form a barrier bag, and the vacuum insulation core material is contained in the barrier bag and evacuated.

[0083] It is easy to understand that the vacuum insulation core material usually has a relatively loose structure, which makes the heat conduction efficiency of the vacuum insulation core material very low. After the vacuum insulation core material is evacuated in the barrier bag, its heat convection efficiency is also reduced as much as possible, so that the vacuum insulation panel has a low thermal conductivity. At the same time, since the material of the heat-sealing layer is ethylene acrylic copolymer, and ethylene acrylic copolymer has a strong affinity for aluminum, it can achieve an excellent bonding effect with a very thin thickness, so that the heat-sealing layer can have a very weak heat bridge effect.

[0084] In some embodiments of the present application, the material of the vacuum insulation core material includes at least one of silica powder, perlite powder, polyurethane foam, polystyrene foam, glass fiber, ceramic fiber, and polymer fiber.

[0085] It is easy to understand that the vacuum insulation core materials formed by the above materials all have a porous structure, low thermal conductivity and can maintain their shape well under atmospheric pressure. The polymer fiber can be a commonly used polymer fiber in the market. As an example, the polymer fiber can be at least one of polyester, acrylic, nylon, polypropylene, aramid, ultra-high molecular weight polyethylene fiber, polypropylene fiber, poly(p-phenylene benzobisoxazole) fiber, polybenzimidazole fiber, poly(p-phenylene pyridine bisimidazole) fiber, and polyimide fiber.

[0086] In a third aspect, the embodiments of the present application provide a method for preparing the vacuum insulation panel according to any one of the embodiments in the second aspect, and the preparation method includes the following steps:

[0087] S1: Provide the barrier film and the barrier film body according to any one of the embodiments in the first aspect;

[0088] S2: Make the surface of the barrier film with the adhesive layer and the surface of the barrier film body with the aluminum layer face each other;

[0089] S3: Bond the barrier film and the barrier film body, and perform hot pressing on the adhesive layer part of the barrier film except for one side edge thereof, so that the barrier film and the barrier film body are bonded to each other and form a barrier bag with an opening at the one side edge of the barrier film;

[0090] S4: Provide a vacuum insulation core material, and load the vacuum insulation core material into the barrier bag through the opening;

[0091] S5: Evacuate the barrier bag through the opening;

[0092] S6: Perform hot pressing on the adhesive layer at the one side edge of the barrier film, so that all the edges of the barrier film and the barrier film body are bonded to each other to obtain the vacuum insulation panel.

[0093] In some embodiments of the present application, a release paper 7 is further provided on the surface of the adhesive layer.

[0094] Before the barrier film and the barrier film body are bonded, first peel off the release paper 7 on the surface of the adhesive layer of the barrier film except for one side edge thereof; the release paper 7 at the one side edge of the barrier film is peeled off after the vacuum insulation core material is loaded into the barrier bag.

[0095] It is easy to understand that before hot pressing in step S3, the release paper 7 should be peeled off first so that the adhesive layer 6 can contact the barrier film body. The beneficial effect of peeling off the release paper 7 at the one side edge of the barrier film after the vacuum insulation core material is loaded into the barrier bag is that it is convenient to bag the vacuum insulation core material and avoid the risk that the adhesive layer at the opening adheres to the vacuum insulation core material during the bagging process.

[0096] Fourthly, an embodiment of the present application provides an application of a vacuum insulation panel. The vacuum insulation panel is the vacuum insulation panel described in any embodiment of the second aspect or the vacuum insulation panel prepared by the method described in any embodiment of the third aspect. The vacuum insulation panel is applied to a refrigeration device or a heat preservation device.

[0097] As an example, the heat preservation device can be any one of a refrigerator, a freezer, a refrigerated container, a refrigerated truck, a cold drink vending machine, a medical heat preservation box, a food heat preservation box, and a water heater.

[0098] Next, the present application will be further described in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present application and not to limit the scope of the present application. The experimental methods without specific conditions in the following embodiments are usually determined according to industry standards. If there is no corresponding industry standard, they are carried out according to general international standards, conventional conditions or conditions recommended by the manufacturer.

[0099] Embodiment 1

[0100] First of all, this embodiment provides a barrier film. Please refer to Figure 1 , the barrier film includes:

[0101] A barrier film body, the shape of the barrier film body is rectangular, and the barrier film body includes a first polymer material layer 1, a second polymer material layer 2, a first aluminum layer 3, a third polymer material layer 4, and a second aluminum layer 5 which are sequentially stacked.

[0102] An adhesive layer, the adhesive layer is provided on the four edges of the surface of the second aluminum layer 5, and the material of the adhesive layer is ethylene acrylic acid copolymer. A release paper 7 is further provided on the surface of the adhesive layer.

[0103] The material of the first polymer material layer 1 is nylon, the material of the second polymer material layer 2 is polyethylene terephthalate, and the material of the third polymer material layer 4 is polyethylene terephthalate.

[0104] The thickness of the first polymer material layer 1 is 10 μm.

[0105] The thickness of the second polymer material layer 2 is 10 μm.

[0106] The thickness of the third polymer material layer 4 is 10 μm.

[0107] The thickness of the first aluminum layer 3 is 10 nm.

[0108] The thickness of the second aluminum layer 5 is 10 nm.

[0109] The thickness of the adhesive layer 6 is 30 μm.

[0110] Then, this embodiment provides a vacuum insulation panel, which includes:

[0111] The above-mentioned barrier film and the barrier film body;

[0112] A vacuum insulation core material,

[0113] Wherein, the barrier film and the barrier film body are arranged opposite to each other, the edges of the barrier film and the barrier film body are bonded through the heat-sealing layer, enclosed into a bag shape to form a barrier bag, and the vacuum insulation core material is contained in the barrier bag and evacuated.

[0114] The material of the vacuum insulation core material includes silica powder.

[0115] This embodiment also provides a preparation method of the above-mentioned vacuum insulation panel, and the preparation method includes the following steps:

[0116] Sa: Provide the above-mentioned barrier film and the barrier film body;

[0117] Sb: Make the surface of the barrier film with the bonding layer and the surface of the barrier film body on the side of the second aluminum layer 5 face each other;

[0118] Sc: Peel off the release paper 7 at the three edges of the barrier film, make the barrier film and the barrier film body fit together, perform hot pressing treatment on the bonding layer at the three edges of the barrier film, make the barrier film and the barrier film body bond to each other, and form an opening at the edge where the hot pressing treatment is not performed to obtain a barrier bag;

[0119] Sd: Provide a vacuum insulation core material, and load the vacuum insulation core material into the barrier bag through the opening;

[0120] Se: Peel off the release paper 7 at the opening, and evacuate the barrier bag through the opening;

[0121] Sf: Perform hot pressing treatment on the bonding layer at the opening so that all the edges of the barrier film and the barrier film body are bonded to each other to obtain the vacuum insulation panel.

[0122] Example 2

[0123] First, this embodiment provides a barrier film. Please refer to Figure 1 , the barrier film includes:

[0124] A barrier film body, the shape of the barrier film body is rectangular, and the barrier film body includes a first polymer material layer 1, a second polymer material layer 2, a first aluminum layer 3, a third polymer material layer 4, and a second aluminum layer 5 that are sequentially stacked;

[0125] A bonding layer, the bonding layer is arranged on the four edges of the surface of the second aluminum layer 5, and the material of the bonding layer is ethylene acrylic copolymer. A release paper 7 is also arranged on the surface of the bonding layer.

[0126] The material of the first polymer material layer 1 is nylon, the material of the second polymer material layer 2 is polyethylene terephthalate, and the material of the third polymer material layer 4 is polyethylene terephthalate.

[0127] The thickness of the first polymer material layer 1 is 20 μm,

[0128] The thickness of the second polymer material layer 2 is 20 μm,

[0129] The thickness of the third polymer material layer 4 is 20 μm,

[0130] The thickness of the first aluminum layer 3 is 100 nm,

[0131] The thickness of the second aluminum layer 5 is 100 nm,

[0132] The thickness of the adhesive layer 6 is 60 μm.

[0133] Then, this embodiment provides a vacuum insulation panel, and the vacuum insulation panel includes:

[0134] The above-mentioned barrier film and barrier film body;

[0135] A vacuum insulation core material,

[0136] Wherein, the barrier film and the barrier film body are arranged opposite to each other, the edges of the barrier film and the barrier film body are bonded through the heat-sealing layer, enclosed into a bag shape to form a barrier bag, and the vacuum insulation core material is contained in the barrier bag and evacuated.

[0137] The material of the vacuum insulation core material includes polyurethane foam.

[0138] This embodiment also provides a method for preparing the above-mentioned vacuum insulation panel, and the preparation method includes the following steps:

[0139] Sa: Provide the above-mentioned barrier film and the barrier film body;

[0140] Sb: Make the side surface of the barrier film with the adhesive layer and the side surface of the barrier film body opposite to the side surface of the second aluminum layer 5;

[0141] Sc: Peel off the release paper 7 at the three edges of the barrier film, make the barrier film and the barrier film body fit, perform hot pressing treatment on the adhesive layer at the three edges of the barrier film, make the barrier film and the barrier film body bond to each other, and form an opening at the edge where the hot pressing treatment is not performed to obtain a barrier bag;

[0142] Sd: Provide a vacuum insulation core material, and load the vacuum insulation core material into the barrier bag through the opening;

[0143] Se: Peel off the release paper 7 at the opening, and evacuate the barrier bag through the opening;

[0144] Sf: Perform hot pressing treatment on the adhesive layer at the opening, make all the edges of the barrier film and the barrier film body bond to each other, and obtain the vacuum insulation panel.

[0145] Example 3

[0146] First of all, this embodiment provides a barrier film. Please refer to Figure 1 , the barrier film includes:

[0147] A barrier film body, the shape of the barrier film body is rectangular, and the barrier film body includes a first polymer material layer 1, a second polymer material layer 2, a first aluminum layer 3, a third polymer material layer 4, and a second aluminum layer 5 that are sequentially stacked;

[0148] An adhesive layer, the adhesive layer is arranged at the four edges of the surface of the second aluminum layer 5, and the material of the adhesive layer is ethylene acrylic copolymer. A release paper 7 is also arranged on the surface of the adhesive layer.

[0149] The material of the first polymer material layer 1 is nylon, the material of the second polymer material layer 2 is polyethylene terephthalate, and the material of the third polymer material layer 4 is polyethylene terephthalate.

[0150] The thickness of the first polymer material layer 1 is 15 μm,

[0151] The thickness of the second polymer material layer 2 is 15 μm,

[0152] The thickness of the third polymer material layer 4 is 15 μm,

[0153] The thickness of the first aluminum layer 3 is 50 nm,

[0154] The thickness of the second aluminum layer 5 is 50 nm,

[0155] The thickness of the adhesive layer 6 is 40 μm.

[0156] Then, this embodiment provides a vacuum insulation panel, which includes:

[0157] The above-mentioned barrier film and the barrier film body;

[0158] A vacuum insulation core material,

[0159] Wherein, the barrier film and the barrier film body are arranged oppositely, the edges of the barrier film and the barrier film body are bonded through the heat-sealing layer, enclosed into a bag shape to form a barrier bag, and the vacuum insulation core material is contained in the barrier bag and evacuated.

[0160] The material of the vacuum insulation core material includes glass fiber.

[0161] This embodiment also provides a preparation method of the above-mentioned vacuum insulation panel, and the preparation method includes the following steps:

[0162] Sa: Provide the above-mentioned barrier film and the barrier film body;

[0163] Sb: Make the surface of the barrier film with the adhesive layer and the surface of the barrier film body on the side of the second aluminum layer 5 face each other;

[0164] Sc: Peel off the release paper 7 at the three edges of the barrier film, make the barrier film and the barrier film body fit together, perform hot pressing treatment on the adhesive layer at the three edges of the barrier film, make the barrier film and the barrier film body bond to each other, and form an opening at the edge where the hot pressing treatment is not performed to obtain a barrier bag;

[0165] Sd: Provide a vacuum insulation core material, and load the vacuum insulation core material into the barrier bag through the opening;

[0166] Se: Peel off the release paper 7 at the opening, and evacuate the barrier bag through the opening;

[0167] Sf: Perform hot pressing treatment on the adhesive layer at the opening, so that all the edges of the barrier film and the barrier film body bond to each other to obtain the vacuum insulation panel.

[0168] The various embodiments of the present application may exist in the form of a range; it should be understood that the description in the form of a range is only for convenience and brevity and should not be construed as a rigid limitation on the scope of the present application; therefore, it should be considered that the description of the said range has specifically disclosed all possible sub-ranges and individual values within that range. For example, it should be considered that the description of the range from 1 to 6 has specifically disclosed sub-ranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and individual numbers within the range, such as 1, 2, 3, 4, 5, and 6, and this applies regardless of the range. Additionally, whenever a numerical range is indicated herein, it means including any cited number (fractional or integer) within the indicated range.

[0169] In this application, unless otherwise specified, the orientation terms such as "upper" and "lower" specifically refer to the drawing directions in the attached drawings. Additionally, in the description of the specification of this application, the terms "include", "comprise", etc. mean "include but not limited to". Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, the elements defined by the statement "including..." do not exclude the existence of additional identical elements in the process, method, article or device including the said elements. In this article, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In this article, "and / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, or B exists alone. For the association relationship of more than three associated objects described by "and / or", it means that these three associated objects can exist alone for any one item, or any at least two of them exist simultaneously. For example, for A, and / or B, and / or C, it can represent that any one of A, B, and C exists alone, or any two of them exist simultaneously, or all three of them exist simultaneously. In this article, "at least one" means one or more, and "multiple" means two or more. "At least one kind", "at least one item (piece) below" or similar expressions refer to any combination of these items, including any combination of single item (piece) or plural items (pieces). For example, "at least one item (piece) among a, b, or c", or, "at least one item (piece) among a, b, and c" can both represent: a, b, c, a - b (i.e., a and b), a - c, b - c, or a - b - c, where a, b, and c can be single or multiple respectively. The "parts representation method" involved in this application, such as parts by weight, parts by mass, etc., represents the proportional relationship between each component. In the proportional relationship involved in this application, the parameters that need to be described by proportion should be understood as the antecedents of the proportion formula in the order of description, and the proportional numbers should be understood as the consequents of the proportion formula. For example, if the mass ratio of substance A, substance B, and substance C is 1:2:3, then substance A, substance B, and substance C should correspond one by one with the proportional numbers in the proportion formula in the order of description, that is, the mass of substance A: the mass of substance B: the mass of substance C = 1:2:3.

[0170] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A barrier film, characterized in that, The barrier film includes: A barrier film body, which is formed by laminating a polymer material layer and an aluminum layer, and at least one side surface of the barrier film body is an aluminum layer; An adhesive layer, which is provided at the edge of the side surface of the barrier film body that is the aluminum layer, and the material of the adhesive layer is ethylene acrylic copolymer.

2. The barrier film according to claim 1, wherein The material of the polymer material layer is at least one of nylon, polyester, polyvinylidene chloride, and polyethylene.

3. The barrier film according to claim 2, wherein The polymer material layer includes a first polymer material layer, a second polymer material layer, and a third polymer material layer, and the aluminum layer includes a first aluminum layer and a second aluminum layer. The first polymer material layer, the second polymer material layer, the first aluminum layer, the third polymer material layer, and the second aluminum layer are sequentially laminated.

4. The barrier film according to claim 3, characterized in that, The material of the first polymer material layer is at least one of polyethylene terephthalate and nylon; and / or The material of the second polymer material layer is at least one of polyethylene terephthalate and nylon; and / or The material of the third polymer material layer is at least one of polyethylene terephthalate and nylon.

5. The barrier film according to claim 3, characterized in that, The material of the first polymer material layer is nylon, the material of the second polymer material layer is polyethylene terephthalate, and the material of the third polymer material layer is polyethylene terephthalate.

6. The barrier film according to claim 3, wherein The thickness of the first polymer material layer is 10 - 20 μm; and / or The thickness of the second polymer material layer is 10 - 20 μm; and / or The thickness of the third polymer material layer is 10 - 20 μm; and / or The thickness of the first aluminum layer is 10 - 100 nm; and / or The thickness of the second aluminum layer is 10 - 100 nm; and / or The thickness of the adhesive layer is 30 - 60 μm.

7. The barrier film according to claim 1, wherein A release paper is also provided on the surface of the adhesive layer.

8. A vacuum insulation panel, characterized in that, The vacuum insulation panel includes: The barrier film and the barrier film body according to any one of claims 1 - 7; A vacuum insulation core material, wherein the barrier film and the barrier film body are arranged oppositely, and the edges of the barrier film and the barrier film body are bonded through the heat-sealing layer, enclosed to form a bag shape and form a barrier bag, and the vacuum insulation core material is contained in the barrier bag and evacuated.

9. The vacuum insulation panel according to claim 8, characterized in that, The material of the vacuum insulation core material includes at least one of silica powder, perlite powder, polyurethane foam, polystyrene foam, glass fiber, ceramic fiber, and polymer fiber.

10. A method for preparing a vacuum insulation panel, characterized in that, The preparation method includes the following steps: Provide the barrier film and the barrier film body according to any one of claims 1 - 7; Arrange the barrier film on one side surface of the adhesive layer and the side surface of the barrier film body that is the aluminum layer to be opposite; Bond the barrier film and the barrier film body, and perform hot pressing on the adhesive layer part of the barrier film except for one side edge thereof, so that the barrier film and the barrier film body are bonded to each other and form a barrier bag having an opening at the one side edge of the barrier film; Provide a vacuum insulation core material, and load the vacuum insulation core material into the barrier bag through the opening; Evacuate the barrier bag through the opening; Perform hot pressing treatment on the adhesive layer at the side edge of the barrier film, so that all the edges of the barrier film and the barrier film body are adhesively bonded to each other to obtain the vacuum insulation panel.

11. The preparation method of the vacuum insulation panel according to claim 10, characterized in that, A release paper is also provided on the surface of the adhesive layer. Before bonding the barrier film and the barrier film body, first peel off the release paper on the surface of the adhesive layer of the other parts of the barrier film except for one of its side edges; the release paper at the side edge of the barrier film is peeled off after the vacuum insulation core material is loaded into the barrier bag.

12. Application of a vacuum insulation panel, characterized in that, The vacuum insulation panel is the vacuum insulation panel described in claim 8 or 9, or the vacuum insulation panel prepared by the preparation method described in claims 10 to 11, and the vacuum insulation panel is applied to a refrigeration device or a heat preservation device.

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