Vacuum insulation panel and preparation method and application thereof

Abstract

The invention belongs to the technical field of functional materials, and particularly relates to a vacuum insulation panel and a preparation method and application thereof.The vacuum insulation panel comprises a core material and a film material, the film material is in a bag shape, and the core material is heat-sealed in the film material in a vacuum mode; wherein the core material comprises organic fibers and an opacifying agent, and the heat conductivity coefficient of the core material is smaller than or equal to 3.0 mW / (m.K). According to the vacuum insulated panel provided by the invention, the core material comprises the organic fibers and the opacifying agent, and the organic fibers construct the three-dimensional network architecture, so that the organic core material with a low heat conductivity coefficient can be prepared by fully utilizing the lower intrinsic heat conductivity coefficient of the organic fibers, and the opacifying agent is distributed on the surface of the three-dimensional network architecture; therefore, the high-temperature radiation heat conductivity can be reduced and the high-temperature heat insulation performance of the core material can be improved by utilizing the relatively strong scattering and absorbing effects of the opacifying agent particles on radiation, so that the heat conductivity coefficient can reach 3.0 mW / (m.K) or below, and the vacuum heat insulation plate with a low heat conductivity coefficient can be processed.

Description

Technical Field

[0001] The present invention belongs to the technical field of functional materials, and particularly relates to a vacuum insulation panel, a preparation method thereof, and an application thereof. Background Art

[0002] In household appliances (such as refrigerators) that require refrigeration or freezing functions, heat insulation materials are usually needed. Vacuum insulation panels (VIPs) are widely used in household appliances due to their good heat insulation performance. The structural composition of a vacuum insulation panel generally includes: a main core material, a getter / dryer, and an outer packaging film material; among them, the core material is the core material of the entire vacuum insulation panel, and its material and structural composition have a great impact on the thermal conductivity of the vacuum insulation panel.

[0003] Currently, the core materials of vacuum insulation panels on the market mainly include granular fumed silica and glass fiber. At low vacuum levels, the contact points of fumed silica powder particles are relatively numerous, and the contact heat transfer is relatively high. Fumed silica as the core material faces problems such as high cost and difficulty in further reducing the thermal conductivity.

[0004] The core material prepared using glass fiber (such as man-made glass fiber) for a vacuum insulation panel has a very high porosity and a low thermal conductivity. However, when using glass fiber to produce the core material, cutting is required during the process, which will result in a large amount of glass fiber dust, adhering to parts such as the skin and mucous membranes, and causing strong irritation. The glass fiber industry belongs to a high-energy-consuming and highly polluting industry, and the areas where its production plants are located are also strictly restricted.

[0005] Therefore, in view of the above deficiencies, the present invention is specifically proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a vacuum insulation panel, a preparation method thereof, and an application thereof, so as to solve the problems of high pollution and high energy consumption caused by the use of glass fiber in the existing vacuum insulation panel.

[0007] In a first aspect of the present invention, a vacuum insulation panel is provided, which includes a core material and a film material. The film material is in a bag shape, and the core material is vacuum heat-sealed in the film material; wherein,

[0008] the core material includes organic fiber and a light-shielding agent, and the thermal conductivity of the vacuum insulation panel is ≤3.0 mW / (m·K).

[0009] The vacuum insulation panel provided by the present invention may further have the following additional technical features:

[0010] In a specific embodiment of the present invention, the weight ratio of the organic fiber to the light-shielding agent is 1:(0.01 - 0.1).

[0011] In a specific embodiment of the present invention, the organic fiber includes at least one of polyester fiber, polyethylene fiber, polypropylene fiber, polyvinyl alcohol fiber, polyacrylonitrile fiber, polystyrene fiber, and polylactic acid fiber.

[0012] In a specific embodiment of the present invention, the length of the organic fiber is 1 to 12 mm;

[0013] and / or, the diameter of the organic fiber is 2 to 15 μm.

[0014] In a specific embodiment of the present invention, the light-shielding agent is zinc oxide, silicon carbide, and / or carbon black.

[0015] In a specific embodiment of the present invention, there are multiple core materials, and the multiple core materials are stacked.

[0016] In a specific embodiment of the present invention, the density of the vacuum insulation panel is 100 g / cm 3 ~300 g / cm 3 .

[0017] In a specific embodiment of the present invention, the porosity of the core material is 60% to 95%.

[0018] The second aspect of the present invention also provides a method for preparing the above-mentioned vacuum insulation panel, including the following steps:

[0019] (1) Melt-blown spinning of the masterbatch of the organic fiber to form an organic fiber web;

[0020] (2) Spraying a light-shielding agent dispersion liquid onto the organic fiber web and drying to obtain an organic fiber layer;

[0021] (3) Stacking the organic fiber layers and then performing heat treatment to obtain a core material;

[0022] (4) Placing the core material in a film bag formed by a film material and vacuum heat-sealing to obtain the vacuum insulation panel.

[0023] The third aspect of the present invention also provides a heat insulation and preservation device, and the heat insulation and preservation device includes the vacuum insulation panel described in any one of the above; the heat insulation and preservation device includes a refrigerator, a heat preservation box, a water heater, a microwave oven, a container, and a building wall panel.

[0024] According to the vacuum insulation panel provided by the embodiment of the present invention, since its core material includes organic fibers and a light-shielding agent, and the three-dimensional network structure is built by the organic fibers, it is possible to fully utilize the lower intrinsic thermal conductivity of the organic fibers to prepare an organic core material with a low thermal conductivity. The light-shielding agent is distributed on the surface of the three-dimensional network structure. Therefore, the strong scattering and absorption effects of the light-shielding agent particles on radiation can be utilized to reduce the high-temperature radiation thermal conductivity and improve the high-temperature heat insulation performance of the core material. As a result, the thermal conductivity can reach below 3.0 mW / (m·K), and further a vacuum insulation panel with a low thermal conductivity can be processed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram of the vacuum insulation panel of the present invention;

[0027] Figure 2 It is a microscopic morphology diagram of the organic fiber mesh magnified 20 times.

[0028] Description of the reference numerals:

[0029] 10 - Vacuum insulation panel;

[0030] 1 - Core material, 2 - Film material, 3 - Desiccant or getter. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will describe the exemplary embodiments of the present invention in more detail with reference to the drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0032] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically indicated as an order of performance. It should also be understood that additional or alternative steps may be used.

[0033] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first", "second", and other numerical terms when used herein do not imply an order or sequence. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0034] For ease of description, spatial relative relation terms may be used herein to describe the relationship of one element or feature shown in the figures to another element or feature, such as "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "over", etc. Such spatial relative relation terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "beneath" another element or feature will then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can include both the above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relation descriptors used herein are to be interpreted accordingly.

[0035] A first aspect of the present invention provides a vacuum insulation panel 10, which is applied to a heat insulation and preservation device, and the heat insulation and preservation device includes a refrigerator, a thermal insulation box, a water heater, a microwave oven, a container, a building wall panel, and is used to reduce the heat transfer at the corresponding installation position, so as to achieve the heat insulation and preservation effect.

[0036] Specifically, referring to Figure 1-2 , a vacuum insulation panel 10 provided by an embodiment of the present invention includes a core material 1 and a film material 2. The film material 2 is in a bag shape, and the core material 1 is vacuum heat-sealed in the film material 2. Among them, the core material 1 includes organic fibers and a light-shielding agent, and the thermal conductivity of the vacuum insulation panel 10 is ≤ 3.0 mW / (m·K).

[0037] For the vacuum insulation panel 10 provided by the embodiment of the present invention, since its core material 1 includes organic fibers and a light-shielding agent, and a three-dimensional network structure is built by the organic fibers, an organic core material 1 with a low thermal conductivity can be prepared by making full use of the relatively low intrinsic thermal conductivity of the organic fibers. The light-shielding agent is distributed on the surface of the three-dimensional network structure. Therefore, the strong scattering and absorption effects of the light-shielding agent particles on radiation can be utilized to reduce the high-temperature radiation heat transfer rate and improve the high-temperature heat insulation performance of the core material 1. As a result, the thermal conductivity can reach below 3.0 mW / (m·K), and further a vacuum insulation panel 10 with a low thermal conductivity can be processed.

[0038] By using organic fibers and a light-shielding agent in the core material 1 of the embodiment of the present invention, the problems of relatively high thermal conductivity, cost, energy consumption, and environment existing in the core material 1 of the glass fiber vacuum insulation panel 10 are overcome. By using the low energy consumption, environmental friendliness, non-toxic and harmless nature, and relatively low intrinsic thermal conductivity of the organic fibers, the organic fibers in the finally prepared core material 1 are all in single-filament point contact or single-filament cross contact, greatly extending the heat conduction path and reducing the thermal conductivity of the core material 1. At the same time, the organic fibers have toughness, and no dust and fine fibers are generated during the cutting process and the production process of the core material 1, without environmental pollution and health risks, and meeting the laws and regulations in regions such as the European Union.

[0039] In some embodiments, the film material 2 may include any one or a combination of two or more of an aluminum-plastic composite film, an aluminized film, a transparent film, etc., but is not limited thereto. When the film material 2 includes a plurality of the above-mentioned aluminum-plastic composite film, aluminized film, and transparent film, the adjacent film materials 2 are connected by adhesive bonding. The film material 2 can well block the penetration of a part of gas and water vapor.

[0040] In some embodiments, the vacuum degree inside the vacuum insulation panel 10 is 1×10 -4 Pa to 1×10 -2 Pa. For example, the vacuum degree inside the vacuum insulation panel 10 is 1×10 -4 Pa, 5×10 -4 Pa, 8×10 -4 Pa, 1×10 -3 Pa, 5×10 -3 Pa, 6×10 - 3 Pa, 7×10 -3 Pa, 8×10 -3 Pa, 9×10 -3Pa, 1×10 -2 Pa.

[0041] In some embodiments, the vacuum insulation panel 10 may further include a desiccant 3 and / or a getter 3.

[0042] The getter 3 may be made of conventional metals and their alloys, such as Group IIA metals (barium, strontium, magnesium, calcium) and their alloys, Group IVB metals (titanium, zirconium, hafnium), thorium, rare earth metals and their alloys.

[0043] The desiccant 3 may include at least one of calcium carbonate, calcium sulfate, calcium oxide, calcium chloride, magnesium chloride, barium oxide. As an example, the desiccant 3 is calcium carbonate.

[0044] The core material 1 is formed into a rectangular plate-like structure, and a receiving groove or a receiving hole for accommodating the desiccant 3 and the getter 3 may be provided thereon. The getter 3, the desiccant 3 and the core material 1 are vacuum-packaged together inside the film material 2. The getter 3 is used to absorb the residual oxygen released by the film material 2 and the core material 1 during use, and the desiccant 3 is used to absorb moisture, so as to ensure the vacuum degree of the vacuum insulation panel 10.

[0045] In a specific embodiment of the present invention, the weight ratio of the organic fiber to the light-shielding agent is 1:(0.01 - 0.1). More preferably, the light-shielding agent is zinc oxide, silicon carbide and / or carbon black. As an example, the light-shielding agent is zinc oxide. As an example, the light-shielding agent is silicon carbide. As an example, the light-shielding agent is carbon black. As an example, the light-shielding agent is a mixture of any two or three of zinc oxide, silicon carbide and carbon black. The weight ratio of the organic fiber to the light-shielding agent can be adjusted within the range of 1:0.01 - 1:0.1. For example, the mass ratio of the light-shielding agent to the organic fiber is 1:0.01, 1:0.02, 1:0.03, 1:0.04, 1:0.05, 1:0.06, 1:0.07, 1:0.08, 1:0.09, etc.

[0046] In a specific embodiment of the present invention, the organic fiber includes at least one of polyester fiber, polyethylene fiber, polypropylene fiber, polyvinyl alcohol fiber, polyacrylonitrile fiber, polystyrene fiber, polylactic acid fiber. As an example, the organic fiber is polyester fiber, such as polyethylene terephthalate fiber. As an example, the organic fiber is polyethylene fiber. As an example, the organic fiber is polypropylene fiber. As an example, the organic fiber is polyester fiber and polyvinyl alcohol fiber. As an example, the organic fiber is polyester fiber, polypropylene fiber and polyvinyl alcohol fiber.

[0047] It should be noted that the organic fiber can also be processed by processes such as in-situ modification or composite modification.

[0048] In a specific embodiment of the present invention, the length of the organic fiber is 1 to 12 mm. Specifically, the length of the organic fiber is, for example, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm.

[0049] In this embodiment, by limiting the length of the organic fiber, in this way, the organic fibers in the core material 1 are all single-filament point contacts or cross contacts, greatly extending the heat conduction path and reducing the thermal conductivity of the core material 1.

[0050] In a specific embodiment of the present invention, the diameter of the organic fiber is 2 to 15 μm. Specifically, the diameter of the organic fiber is, for example, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm.

[0051] In this embodiment, by limiting the diameter of the organic fiber, in this way, the organic fibers in the core material 1 are all single-filament point contacts or cross contacts, greatly extending the heat conduction path and reducing the thermal conductivity of the core material 1.

[0052] In a specific embodiment of the present invention, there are multiple core materials 1, and the multiple core materials 1 are stacked.

[0053] Specifically, the core material 1 can be placed in at least 2 layers, 4 layers, 5 layers, 8 layers, 10 layers, 100 layers, 200 layers, 300 layers, 400 layers, 500 layers, etc. The thicknesses of the multiple stacked core materials 1 can be the same or different, and can be specifically selected according to actual needs.

[0054] In this embodiment, by making the vacuum insulation panel 10 have multiple stacked core materials 1, in this way, it is convenient to adjust the thickness of the vacuum insulation panel 10. Specifically, the thickness of the vacuum insulation panel 10 is at least 1 mm, for example, 1 mm to 30 mm, 5 mm to 30 mm, 8 mm to 30 mm, 8 mm to 10 mm. Specifically, the thickness of the vacuum insulation panel 10 is at least 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 13 mm, 17 mm, 18 mm, 19 mm, 20 mm, 24 mm, 25 mm, 26 mm, 30 mm, or even a thicker thickness.

[0055] In a specific embodiment of the present invention, the density of the vacuum insulation panel 10 is 100 g / cm 3 ~300 g / cm 3 . For example, the density of the vacuum insulation panel 10 is 100 g / cm 3 、140 g / cm 3 、170 g / cm 3 、180 g / cm3 , 200 g / cm 3 , 240 g / cm 3 , 250 g / cm 3 , 260 g / cm 3 , 300 g / cm 3 .

[0056] In a specific embodiment of the present invention, the porosity of the core material 1 is 60% to 95%. For example, the porosity of the core material 1 is 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%.

[0057] With the above settings in this embodiment, the core material 1 can have a very high porosity, can be well evacuated, and has a certain structural strength.

[0058] In a specific embodiment of the present invention, the thermal conductivity of the vacuum insulation panel 10 > 0, and the thermal conductivity of the vacuum insulation panel 10 can be ≤ 3.0 mW / (m·K). For example, the thermal conductivity of the vacuum insulation panel 10 can be ≤ 3.0 mW / (m·K), ≤ 2.50 mW / (m·K), ≤ 2.0 mW / (m·K), ≤ 1.80 mW / (m·K), ≤ 1.50 mW / (m·K), ≤ 1.20 mW / (m·K), ≤ 1.00 mW / (m·K), ≤ 0.8 mW / (m·K), ≤ 0.6 mW / (m·K), ≤ 0.4 mW / (m·K), ≤ 0.3 mW / (m·K). Optionally, the thermal conductivity of the vacuum insulation panel 10 is ≤ 3.0 mW / (m·K) and ≥ 0.5 mW / (m·K). Optionally, the thermal conductivity of the vacuum insulation panel 10 is ≤ 3.0 mW / (m·K) and ≥ 0.8 mW / (m·K).

[0059] It can be understood that the core material 1 of the vacuum insulation panel 10 of the present invention, by using organic fibers of a specific specification, has a relatively high porosity, a relatively excellent thermal conductivity, and is light in texture, and can achieve a very good heat insulation and heat preservation effect. At the same time, in the process of preparing the vacuum insulation panel 10 of the present invention, as well as in the process of cutting and processing and producing the core material 1, there will be no dust and fine fibers generated, and there is no environmental pollution and health risk. In addition, by spraying a light-shielding agent during the preparation of the core material 1, the strong scattering and absorption effects of the light-shielding agent particles on radiation can be utilized to reduce the high-temperature radiation heat conductivity and improve the high-temperature heat insulation performance of the core material 1.

[0060] The second aspect of the present invention also provides a method for preparing the above-mentioned vacuum insulation panel 10, including the following steps:

[0061] Step (1) Melt-blown spinning of the masterbatch of organic fibers to form an organic fiber web;

[0062] Step (2): Spray a light-shielding agent dispersion liquid onto the organic fiber web and dry it to obtain an organic fiber layer;

[0063] Step (3): Stack the organic fiber layers and then perform heat treatment to obtain Core Material 1;

[0064] Step (4): Place Core Material 1 in a film bag formed by Film Material 2 and vacuum heat-seal it to obtain Vacuum Insulation Panel 10.

[0065] In Step (1), the organic fiber web is formed as a long fiber web directly formed by extruding resin from a nozzle using melt spinning and stretching. The organic fiber is spun at an extrusion temperature of about 200 - 320°C. In the meltblowing method, the resin is extruded from the front end of the nozzle, and the fibers are stretched by the injection of air and collected on a collector to form a web. In the spunbond method, extrusion is continuously performed from the front ends of multiple spinning nozzles, and the fibers are collected on the collector from the injector by the injection of air to form a web in the same way. The fibers obtained by meltblown spinning have a small diameter and good fiber uniformity.

[0066] In Step (2), the nozzle of the light-shielding agent dispersion liquid is arranged corresponding to the spinning nozzle, so that the light-shielding agent can be sprayed synchronously when the resin material forms a fiber. Specifically, multiple nozzles of the light-shielding agent dispersion liquid can be arranged, and the multiple nozzles are arranged along the axial direction of the nozzle. In this way, the light-shielding agent can adhere to the organic fiber spinning evenly and form an organic fiber web, thereby improving the bonding effect between the light-shielding agent and the organic fiber, and further ensuring a strong scattering and absorption effect on radiation.

[0067] Perform a drying treatment on the organic fiber web adhered with the light-shielding agent dispersion liquid, and the drying temperature is 90 - 300°C. Specifically, the drying temperature can be 90°C, 100°C, 120°C, 150°C, 170°C, 200°C, 220°C, 250°C, 300°C. The drying time can be 1 - 300 min. Specifically, the drying time can be 1 min, 2 min, 5 min, 10 min, 20 min, 50 min, 80 min, 100 min, 200 min, 250 min, 300 min.

[0068] As an example, the drying temperature is 90 - 200°C and the drying time is 10 - 300 min. As an example, the drying temperature is 150 - 300°C and the drying time is 1 - 200 min.

[0069] In step (3), the heat treatment temperature is 100°C to 240°C. Specifically, the heat treatment temperatures are 100°C, 120°C, 150°C, 170°C, 190°C, 200°C, 220°C, and 240°C. The heat treatment time is 1 to 36 hours. Specifically, the heat treatment times are 1 hour, 2 hours, 4 hours, 5 hours, 8 hours, 10 hours, 12 hours, 15 hours, 18 hours, 20 hours, 22 hours, 24 hours, 28 hours, 30 hours, 32 hours, 34 hours, and 36 hours.

[0070] As an example, the heat treatment temperature is 100°C to 240°C and the time is 1 hour to 36 hours. As an example, the heat treatment temperature is 120°C to 220°C and the time is 1.5 hours to 12 hours. As an example, the heat treatment temperature is 140°C to 200°C and the time is 1.5 hours to 8 hours.

[0071] In step (4), first, a bag-shaped film material 2 is made. Specifically, the film materials 2 arranged in opposite layers are pressurized and heated by a heat-sealing device to form a sealed side to make a film bag having at least one opening. Then, the dry core material 1, the getter 3, and the desiccant 3 are loaded into the film bag by an automatic bagging machine and vacuum-sealed to obtain the vacuum insulation panel 10.

[0072] The third aspect of the present invention further provides a heat insulation and heat preservation device. The heat insulation and heat preservation device includes the vacuum insulation panel 10 described in any one of the above; the heat insulation and heat preservation device includes a refrigerator, a heat preservation box, a water heater, a microwave oven, a container, and a building wall panel. Specifically, the vacuum insulation panel 10 refers to the above embodiments. Using the above vacuum insulation panel 10 in the heat insulation and heat preservation components of a refrigerator, a heat preservation box, a water heater, a microwave oven, a container, and a building wall panel can achieve a heat insulation and heat preservation effect.

[0073] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vacuum insulation panel, characterized in that, It includes a core material and a film material. The film material is in a bag shape, and the core material is vacuum heat-sealed in the film material; wherein, the core material includes organic fibers and a light-shielding agent, and the thermal conductivity of the core material is ≤ 3.0 mW / (m·K).

2. The vacuum insulation panel according to claim 1, wherein The weight ratio of the organic fibers to the light-shielding agent is 1:(0.01 - 0.1).

3. The vacuum insulation panel according to claim 1, wherein, The organic fibers include at least one of polyester fiber, polyethylene fiber, polypropylene fiber, polyvinyl alcohol fiber, polyacrylonitrile fiber, polystyrene fiber, and polylactic acid fiber.

4. The vacuum insulation panel according to claim 3, wherein, The length of the organic fibers is 1 - 12 mm; and / or, the diameter of the organic fibers is 2 - 15 μm.

5. The vacuum insulation panel according to claim 1, characterized in that, The light-shielding agent is zinc oxide, silicon carbide, and / or carbon black.

6. The vacuum insulation panel according to claim 1, wherein There are multiple core materials, and the multiple core materials are stacked.

7. The vacuum insulation panel according to claim 1, characterized in that, The density of the vacuum insulation panel is 100 g / cm 3 ~300 g / cm 3 .

8. The vacuum insulation panel according to claim 1, wherein The porosity of the core material is 60% to 95%.

9. A method for preparing the vacuum insulation panel according to any one of claims 1-8, characterized in that, It includes the following steps: (1) Melt-blow spin the masterbatch of organic fibers to form an organic fiber web; (2) Spray the light-shielding agent dispersion liquid onto the organic fiber web and dry it to obtain an organic fiber layer; (3) Stack the organic fiber layers and then conduct heat treatment to obtain the core material; (4) Place the core material in a film bag formed by the film material and conduct vacuum heat-sealing to obtain the vacuum insulation panel.

10. A heat insulation and heat preservation device, characterized in that The heat insulation and preservation device includes the vacuum insulation panel according to any one of claims 1 - 8; the heat insulation and preservation device includes a refrigerator, a heat preservation box, a water heater, a microwave oven, a container, and a building wall panel.

Images