Organic core material for vacuum insulation panel, vacuum insulation panel, and preparation method therefor and use thereof

Abstract

An organic core material for a vacuum insulation panel, a vacuum insulation panel, and a preparation method therefor and the use thereof. The organic core material (1) for a vacuum insulation panel comprises organic fibers. The heat conductivity coefficient of the organic core material for a vacuum insulation panel is less than or equal to 3.0 mW / (m·K). The organic core material for a vacuum insulation panel and the vacuum insulation panel can achieve a very good heat preservation effect, and reduce contamination.

Description

Organic core material for vacuum insulation panel and vacuum insulation panel and preparation method and application thereof

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese Patent Application No. 202410693034.7, filed May 30, 2024, entitled “Organic Core Material for Vacuum Insulation Panel and Vacuum Insulation Panel and Preparation Method and Application Thereof,” the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application belongs to the technical field of functional materials, and specifically relates to an organic core material for a vacuum insulation panel and a vacuum insulation panel and a preparation method and application thereof. BACKGROUND

[0004] In household appliances (e.g., refrigerators) requiring refrigeration or freezing functions, it is often necessary to use thermal insulation materials. Traditional thermal insulation materials, such as polyurethane rigid foam materials (or rigid polyurethane foam materials), are increasingly difficult to meet higher design and energy consumption requirements. On the other hand, it is also desirable to maintain the material to some extent while increasing the use volume.

[0005] Vacuum insulation panels (VIPs) have good thermal insulation performance and are increasingly advantageous in thermal insulation applications such as refrigeration or freezing. The main core material of the vacuum insulation panel is the core material of the entire vacuum insulation panel, and its material and structural composition have a great influence on the thermal conductivity of the vacuum insulation panel.

[0006] The core material of the vacuum insulation panel on the market at present mainly has granular fumed silica and glass fibers. Under low vacuum, the fumed silica powder particles have more contact points, and the contact thermal conductivity is high, which poses problems such as high cost and difficulty in further reducing the thermal conductivity as a core material.

[0007] The organic core material for a vacuum insulation panel prepared using glass fibers (e.g., artificial glass fibers) also has some significant drawbacks. First, using glass fibers requires cutting during the production of the core material, which can result in a large amount of glass fiber dust adhering to the skin and mucous membranes, and causing strong irritation. The glass fiber industry is a high-energy and high-pollution industry, and the location of its production plants is strictly limited. In addition, in the current stage of desiring a lower thermal conductivity, using glass fibers as a vacuum insulation panel core material also faces the technical dilemma of being unable to further reduce the thermal conductivity.

[0008] Vacuum insulation panels using polyurethane foam as the core material have a low open porosity and difficulty in controlling the pore size, and the vacuum degree of the vacuum insulation panel cannot be extracted to the ideal state. Moreover, the foam is a whole, and the contact thermal conductivity is high.

[0009] Therefore, there is still a need to develop a new core material for vacuum insulation panels and a vacuum insulation panel. SUMMARY

[0010] The present application aims to at least solve one of the above technical problems existing in the prior art.

[0011] To this end, an embodiment of the present application provides an organic core material for a vacuum insulation panel

[0012] An embodiment of the present application also provides a vacuum insulation panel.

[0013] An embodiment of the present application also provides a method for preparing an organic core material for a vacuum insulation panel.

[0014] An embodiment of the present application also provides a method for preparing a vacuum insulation panel.

[0015] An embodiment of the present application also provides a thermal insulation device.

[0016] An embodiment of the first aspect of the present application provides an organic core material for a vacuum insulation panel, the organic core material for a vacuum insulation panel comprising organic fibers, the thermal conductivity of the organic core material for a vacuum insulation panel being ≤ 3.0 mW / (m·K).

[0017] According to some non-limiting embodiments of the present application, the thermal conductivity of the organic core material for a vacuum insulation panel can be ≤ 3.0 mW / (m·K), ≤ 2.90 mW / (m·K), ≤ 2.80 mW / (m·K), ≤ 2.70 mW / (m·K), ≤ 2.60 mW / (m·K), ≤ 2.50 mW / (m·K), ≤ 2.40 mW / (m·K), ≤ 2.30 mW / (m·K), ≤ 2.20 mW / (m·K), ≤ 2.10 mW / (m·K), ≤ 2.0 mW / (m·K), ≤ 1.90 mW / (m·K), ≤ 1.80 mW / (m·K), ≤ 1.70 mW / (m·K), ≤ 1.60 mW / (m·K), ≤ 1.50 mW / (m·K), ≤ 1.40 mW / (m·K), ≤ 1.30 mW / (m·K), ≤ 1.20 mW / (m·K), ≤ 1.10 mW / (m·K), ≤ 1.00 mW / (m·K), ≤ 0.9 mW / (m·K), ≤ 0.8 mW / (m·K), ≤ 0.7 mW / (m·K), ≤ 0.6 mW / (m·K), ≤ 0.5 mW / (m·K), ≤ 0.4 mW / (m·K), ≤ 0.3 mW / (m·K).

[0018] According to some non-limiting embodiments of the present application, the thermal conductivity of the organic core material for a vacuum insulation panel can be > 0.

[0019] According to some non-limiting embodiments of the present application, the thermal conductivity of the organic core material for the vacuum insulation panel is greater than 0.3 mW / (m·K) and less than or equal to 1.3 mW / (m·K).

[0020] According to some non-limiting embodiments of the present application, the thermal conductivity of the organic core material for the vacuum insulation panel is less than or equal to 3.0 mW / (m·K) and greater than or equal to 0.5 mW / (m·K).

[0021] According to some non-limiting embodiments of the present application, the thermal conductivity of the organic core material for the vacuum insulation panel is less than or equal to 3.0 mW / (m·K) and greater than or equal to 0.8 mW / (m·K).

[0022] According to some non-limiting embodiments of the present application, the organic fibers are in point contact or cross contact with each other.

[0023] According to some non-limiting embodiments of the present application, when the organic fibers are in physical contact with each other, the contact mode between the organic fibers in contact is partly point contact.

[0024] According to some non-limiting embodiments of the present application, the amount of organic fibers in point contact is at least 60%, at least 70%, at least 80%, at least 82%, at least 85%, at least 87%, at least 90%, at least 92%, at least 95%, at least 97%, at least 98%, at least 99% (of the total number or mass of organic fibers in contact).

[0025] According to some non-limiting embodiments of the present application, when the organic fibers are in physical contact with each other, the contact mode between the organic fibers in contact is all point contact.

[0026] According to some non-limiting embodiments of the present application, the amount of organic fibers in point contact is 100% (of the total number or mass of organic fibers in contact).

[0027] According to some non-limiting embodiments of the present application, the organic fibers are in cross contact with each other.

[0028] According to some non-limiting embodiments of the present application, when the organic fibers are in physical contact with each other, the contact mode between the organic fibers in contact is partly cross contact.

[0029] According to some non-limiting embodiments of the present application, the amount of organic fibers in cross contact is at least 60%, at least 70%, at least 80%, at least 82%, at least 85%, at least 87%, at least 90%, at least 92%, at least 95%, at least 97%, at least 98%, at least 99% (of the total number or mass of organic fibers in contact).

[0030] According to some non-limiting embodiments of the present application, when the organic fibers make physical contact, the contact mode between the organic fibers making contact is all cross contact.

[0031] According to some non-limiting embodiments of the present application, the amount of organic fibers with cross contact is 100% (of the total number or mass of organic fibers making contact).

[0032] According to some non-limiting embodiments of the present application, the length of the organic fibers is 1 mm to 12 mm.

[0033] According to some non-limiting embodiments of the present application, the diameter of the organic fibers is 2 μm to 15 μm.

[0034] According to some non-limiting embodiments of the present application, the organic fibers include at least one of polyester fibers, polyethylene fibers, polypropylene fibers, polyvinyl alcohol fibers, polyacrylonitrile fibers, polystyrene fibers, and polylactic acid fibers.

[0035] According to some non-limiting embodiments of the present application, the organic fibers can also be treated by in-situ modification or composite modification processes.

[0036] According to some non-limiting embodiments of the present application, the density of the organic core material for a vacuum insulation panel is 100 g / cm 3 to 300 g / cm 3 .

[0037] According to some non-limiting embodiments of the present application, the porosity of the organic core material for a vacuum insulation panel is 60% to 95%.

[0038] Embodiments of the second aspect of the present application provide a vacuum insulation panel including the above-mentioned organic core material for a vacuum insulation panel and a packaging film material that encloses the organic core material for a vacuum insulation panel.

[0039] According to some non-limiting embodiments of the present application, the vacuum insulation panel further includes at least one of a desiccant and a getter, and the packaging film material encloses the organic core material for a vacuum insulation panel and the at least one of a desiccant and a getter.

[0040] According to some non-limiting embodiments of the present application, the vacuum insulation panel includes the organic core material for a vacuum insulation panel and a desiccant. The packaging film material encloses the organic core material for a vacuum insulation panel and the desiccant.

[0041] According to some non-limiting embodiments of the present application, the vacuum insulation panel comprises the vacuum insulation panel organic core material and the getter. The packaging film material encloses the vacuum insulation panel organic core material and the getter.

[0042] According to some non-limiting embodiments of the present application, the vacuum insulation panel comprises the vacuum insulation panel organic core material and the desiccant and the getter. The packaging film material encloses the vacuum insulation panel organic core material and the desiccant and the getter.

[0043] According to some non-limiting embodiments of the present application, the desiccant and the getter are placed together or separately.

[0044] According to some non-limiting embodiments of the present application, the vacuum insulation panel organic core material is cut to form a groove, and the groove is sized to accommodate the desiccant and / or the getter. The desiccant and / or the getter are placed in the groove, and the vacuum insulation panel organic core material, the desiccant and / or the getter are enclosed using the packaging film material, and the vacuum is extracted and sealed.

[0045] According to some non-limiting embodiments of the present application, the number of grooves is at least one, and the desiccant and the getter are placed therein.

[0046] According to some non-limiting embodiments of the present application, the number of grooves is two, and the desiccant is placed in one groove and the getter is placed in the other groove.

[0047] According to some non-limiting embodiments of the present application, the desiccant comprises at least one of calcium carbonate, calcium sulfate, calcium oxide, calcium chloride, magnesium chloride, and barium oxide.

[0048] According to some non-limiting embodiments of the present application, the getter comprises at least one of a barium-lithium alloy getter, a palladium oxide getter, and an activated carbon getter.

[0049] According to some non-limiting embodiments of the present application, the vacuum insulation panel is composed of a core material, a packaging film material, a getter, and a desiccant. The core material, the getter, and the desiccant are placed in a bag of the packaging film material, the vacuum is extracted, and then the heat sealing is performed, thereby obtaining the vacuum insulation panel.

[0050] According to some non-limiting embodiments of the present application, the thickness of the vacuum insulation panel is at least 1 mm.

[0051] According to some non-limiting embodiments of the present application, the vacuum degree inside the vacuum insulation panel is 1 x 10 -4 Pa to 1 x 10 -2 Pa.

[0052] According to some non-limiting embodiments of the present application, the thermal conductivity of the vacuum insulation panel can be < 3.0 mW / (m·K) or < 1.6 mW / (m·K).

[0053] Embodiments of the third aspect of the present application provide a method for preparing an organic core material for a vacuum insulation panel, comprising the following steps:

[0054] (1) dispersing organic fibers into a liquid to obtain an organic fiber suspension;

[0055] (2) forming the organic fibers in the organic fiber suspension into a fiber web, and drying to obtain a fiber cloth; and

[0056] (3) stacking the fiber cloth, and then performing heat treatment to obtain the organic core material for the vacuum insulation panel.

[0057] According to some non-limiting embodiments of the present application, the way of forming the organic fibers in the organic fiber suspension into a fiber web includes forming the organic fibers in the organic fiber suspension into a fiber web by a wet process.

[0058] According to some non-limiting embodiments of the present application, the way of forming the organic fibers in the organic fiber suspension into a fiber web includes forming the organic fibers in the organic fiber suspension into a fiber web by a wet-laid process, or, sheeting the organic fibers in the organic fiber suspension.

[0059] According to some non-limiting embodiments of the present application, the organic fibers are dispersed into water to obtain the organic fiber suspension.

[0060] According to some non-limiting embodiments of the present application, in step (1), at least one of mechanical stirring, microwave heating or ultrasonic is used to disperse the organic fibers into a liquid (e.g., water) to obtain the organic fiber suspension.

[0061] According to some non-limiting embodiments of the present application, the mass content of the organic fibers in the organic fiber suspension is 0.005% to 1.0%.

[0062] According to some non-limiting embodiments of the present application, the drying temperature is 90°C to 300°C.

[0063] According to some non-limiting embodiments of the present application, the drying time is 1 hour to 36 hours.

[0064] According to some non-limiting embodiments of the present application, the areal density of the fiber cloth is 2 g / m 2 to 150 g / m 2 .

[0065] According to some non-limiting embodiments of the present application, the fiber cloth is stacked for at least 2 layers in step (3).

[0066] According to some non-limiting embodiments of the present application, the temperature of the heat treatment is 100-240°C.

[0067] According to some non-limiting embodiments of the present application, the time of the heat treatment is 1-36 hours.

[0068] Embodiments of the fourth aspect of the present application provide a method for preparing the above-mentioned vacuum insulation panel, comprising the following steps:

[0069] The vacuum insulation panel is packaged with a packaging film material for the organic core material and then vacuumized to obtain the vacuum insulation panel.

[0070] Specifically, in combination with the fourth aspect, a method for preparing the above-mentioned vacuum insulation panel, comprising the following steps:

[0071] (1) dispersing organic fibers into a liquid (e.g. water) to obtain an organic fiber suspension;

[0072] (2) forming the organic fibers in the organic fiber suspension into a fiber web, and drying to obtain a fiber cloth;

[0073] (3) stacking the fiber cloth and then heat treating to obtain the organic core material for the vacuum insulation panel; and

[0074] (4) packaging the organic core material for the vacuum insulation panel with a packaging film material and then vacuumizing to obtain the vacuum insulation panel.

[0075] Embodiments of the fifth aspect of the present application provide an insulation device, which comprises the above-mentioned organic core material for the vacuum insulation panel or the vacuum insulation panel; the insulation device comprises a refrigerator, an insulation box, a water heater, a microwave oven, a container, a building wallboard. BRIEF DESCRIPTION OF DRAWINGS

[0076] Fig. 1 is a structural schematic diagram of the vacuum insulation panel of the present application;

[0077] Fig. 2 is a micro-morphology diagram of the fiber cloth prepared in Example 5, magnified by 20 times;

[0078] Fig. 3 is a micro-morphology diagram of the fiber cloth prepared in Comparative Example 2, magnified by 20 times.

[0079] Reference signs: 1: organic core material for the vacuum insulation panel; 2: packaging film material; 3: desiccant and getter. DETAILED DESCRIPTION

[0080] The concept and the technical effects generated by the present application will be described clearly and completely in combination with the embodiments below, so as to fully understand the purpose, features and effects of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments, and other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative labor are within the scope of protection of the present application.

[0081] In the description of the present application, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number. If it is described that the first, the second is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0082] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0083] Unless otherwise indicated herein, or in the context of a contradiction with the context apparent, all methods described herein can be performed in any suitable order.

[0084] The use of any and all examples, or exemplary language (e.g., "such as") provided herein, is intended merely to better illuminate the application and does not pose a limitation on the scope of the application unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the application.

[0085] Unless otherwise noted, the specific conditions in the examples are carried out according to the conventional conditions or the conditions recommended by the manufacturer.

[0086] In household appliances requiring refrigeration or freezing functions (such as refrigerators), it is often necessary to use thermal insulation materials. The conventional thermal insulation materials, such as polyurethane rigid foam materials (or rigid polyurethane foam materials), have a thermal conductivity of 19 mW / (m·K) to 23 mW / (m·K). On the one hand, in the face of the increasing demand for low energy consumption, the current thermal insulation materials are increasingly difficult to meet the higher design and energy consumption requirements. On the other hand, it is also desirable to maintain the material to some extent while increasing the use of volume.

[0087] Vacuum insulation panel (VIP) has good thermal insulation performance, and has more and more significant advantages in thermal insulation applications such as refrigeration or freezing. The structure of the vacuum insulation panel generally comprises: a main core material, a getter / desiccant, and an outer packaging film material; wherein the core material is the core material of the entire vacuum insulation panel, and the material and structure have a great influence on the thermal conductivity of the vacuum insulation panel.

[0088] The core material of the vacuum insulation panel on the market at present mainly includes granular fumed silica and glass fiber. Under low vacuum degree, the contact points of fumed silica powder particles are more, and the contact heat conduction is higher. Fumed silica as a core material faces problems such as high cost and difficulty in further reducing thermal conductivity.

[0089] The organic core material of the vacuum insulation panel prepared by using glass fiber (such as artificial glass fiber) has high porosity and low thermal conductivity. At the same time, glass fiber has the advantages of high temperature resistance, fire resistance and low cost. Glass fiber can well meet the requirements of low energy consumption and high volume of thermal insulation equipment, and has become the mainstream material in the market. However, glass fiber still has some significant shortcomings. First, using glass fiber in the process of producing core material needs to be cut off, which will cause a large amount of glass fiber dust to adhere to the skin and mucous membrane, and produce strong irritation. The glass fiber industry belongs to a high energy consumption and high pollution industry, and the location of its production plant is also strictly limited. In addition, in the aspect of expecting lower thermal conductivity at the present stage, using glass fiber as the core material of the vacuum insulation panel also faces the technical difficulty of being unable to further reduce the thermal conductivity.

[0090] The vacuum insulation panel with polyurethane foam as the core material cannot be vacuumized to the ideal state due to the low open porosity of the polyurethane foam and the difficulty in controlling the pore size. Moreover, the foam is a whole, and the contact heat conduction accounts for a high proportion, so that the thermal conductivity is difficult to reach below 6.0 mW / (m·K)

[0091] Therefore, it is still necessary to develop a new core material for vacuum insulation panel and a vacuum insulation panel.

[0092] Therefore, in the first aspect, in some non-limiting embodiments of the present application, the present application provides an organic core material for vacuum insulation panel, which comprises organic fiber, and the thermal conductivity of the organic core material for vacuum insulation panel is ≤3.0 mW / (m·K).

[0093] The thermal conductivity of the organic core material for the vacuum insulation panel can be ≤ 3.0 mW / (m·K), ≤ 2.90 mW / (m·K), ≤ 2.80 mW / (m·K), ≤ 2.70 mW / (m·K), ≤ 2.60 mW / (m·K), ≤ 2.50 mW / (m·K), ≤ 2.40 mW / (m·K), ≤ 2.30 mW / (m·K), ≤ 2.20 mW / (m·K), ≤ 2.10 mW / (m·K), ≤ 2.0 mW / (m·K), ≤ 1.90 mW / (m·K), ≤ 1.80 mW / (m·K), ≤ 1.70 mW / (m·K), ≤ 1.60 mW / (m·K), ≤ 1.50 mW / (m·K), ≤ 1.40 mW / (m·K), ≤ 1.30 mW / (m·K), ≤ 1.20 mW / (m·K), ≤ 1.10 mW / (m·K), ≤ 1.00 mW / (m·K), ≤ 0.9 mW / (m·K), ≤ 0.8 mW / (m·K), ≤ 0.7 mW / (m·K), ≤ 0.6 mW / (m·K), ≤ 0.5 mW / (m·K), ≤ 0.4 mW / (m·K), ≤ 0.3 mW / (m·K). The thermal conductivity of the organic core material for the vacuum insulation panel is > 0. Optionally, the thermal conductivity of the organic core material for the vacuum insulation panel is ≤ 3.0 mW / (m·K) and ≥ 0.5 mW / (m·K). Optionally, the thermal conductivity of the organic core material for the vacuum insulation panel is ≤ 3.0 mW / (m·K) and ≥ 0.8 mW / (m·K).

[0094] In combination with the first aspect, in some non-limiting embodiments of the present application, the organic fibers are in point contact or cross contact with each other.

[0095] For the purpose of explanation and not limitation, the organic fibers are in partial or full point contact with each other, rather than in line contact or no line contact.

[0096] In combination with the first aspect, in some non-limiting embodiments of the present application, the organic core material for the vacuum insulation panel is composed of organic fibers, and the thermal conductivity of the organic core material for the vacuum insulation panel is ≤ 3.0 mW / (m·K).

[0097] According to some non-limiting embodiments of the present application, the organic fibers are in point contact or cross contact with each other.

[0098] According to some non-limiting embodiments of the application, when the organic fibers are in physical contact, the contact between the organic fibers that are in contact is partially point contact. For example, when the organic fibers are in physical contact, the contact between the organic fibers that are in contact is partially point contact. Further, the amount of organic fibers that are in point contact is at least 60%, at least 70%, at least 80%, at least 82%, at least 85%, at least 87%, at least 90%, at least 92%, at least 95%, at least 97%, at least 98%, at least 99% (of the total number or mass of organic fibers that are in contact).

[0099] According to some non-limiting embodiments of the application, when the organic fibers are in physical contact, the contact between the organic fibers that are in contact is entirely point contact. For example, when the organic fibers are in physical contact, the contact between the organic fibers that are in contact is entirely point contact. Further, the amount of organic fibers that are in point contact is 100% (of the total number or mass of organic fibers that are in contact).

[0100] According to some non-limiting embodiments of the application, the organic fibers are in cross contact. Optionally, when the organic fibers are in physical contact, the contact between the organic fibers that are in contact is partially cross contact. For example, when the organic fibers are in physical contact, the contact between the organic fibers that are in contact is partially cross contact. Further, the amount of organic fibers that are in cross contact is at least 60%, at least 70%, at least 80%, at least 82%, at least 85%, at least 87%, at least 90%, at least 92%, at least 95%, at least 97%, at least 98%, at least 99% (of the total number or mass of organic fibers that are in contact).

[0101] According to some non-limiting embodiments of the application, when the organic fibers are in physical contact, the contact between the organic fibers that are in contact is entirely cross contact. For example, when the organic fibers are in physical contact, the contact between the organic fibers that are in contact is entirely cross contact. Further, the amount of organic fibers that are in cross contact is 100% (of the total number or mass of organic fibers that are in contact).

[0102] The term "point contact" as used herein refers to when two fibers are in physical contact, the place where they touch is a point.

[0103] For the purposes of explanation and not limitation, the organic fibers are not in line contact. For example, no two organic fibers are in contact in a side-by-side manner. For the purposes of explanation and not limitation, the organic fibers are not in face contact.

[0104] The organic core material for a vacuum insulation panel of the present application constructs a three-dimensional network architecture of organic fiber construction to support the core architecture of the vacuum insulation panel, fully utilizes the low intrinsic thermal conductivity of the organic fiber and the three-dimensional structure constructed, and finally prepares the organic core material for a vacuum insulation panel with excellent performance and low thermal conductivity.

[0105] The present application overcomes the problems of high thermal conductivity, cost, energy consumption and environment of the particulate fumed silica or glass fiber vacuum insulation panel core material, utilizes the low energy consumption, environmental friendliness, non-toxicity, harmlessness and low intrinsic thermal conductivity of the organic fiber, and finally prepares the organic fiber in the vacuum insulation panel core material to be single filament point contact or single filament cross contact, greatly extending the heat conduction path and reducing the thermal conductivity of the core material. For the purpose of explanation but not limitation, when the organic fibers are in physical contact, the single filament point contact or single filament cross contact means that the contact mode between each fiber filament producing physical contact is point contact or cross contact.

[0106] The organic core material for a vacuum insulation panel of the present application uses organic fibers with toughness, and no dust and fine fibers are generated during cutting processing and production of the core material, without environmental pollution and health risks, meeting the regulatory requirements of the European Union and other regions.

[0107] Without wishing to be bound by theory, the applicant unexpectedly found that the organic core material for a vacuum insulation panel prepared from a certain specification of organic fiber (especially polyester fiber) has good thermal insulation performance, and its thermal conductivity can reach below 3.0 mW / (m·K) or below 1.6 mW / (m·K). Among various different materials of vacuum insulation panels, the performance of the vacuum insulation panel of the present application exceeds that of the vacuum insulation panel with glass fiber as the core material.

[0108] In combination with the first aspect, in some non-limiting embodiments of the present application, the length of the organic fiber is 1 mm 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, or 12 mm.

[0109] In combination with the first aspect, in some non-limiting embodiments of the present application, the length of the organic fiber is 2 mm to 8 mm.

[0110] In combination with the first aspect, in some non-limiting embodiments of the present application, the length of the organic fiber is 3 mm to 6 mm.

[0111] In the embodiments of this application, the length of the organic fibers is 1 mm to 12 mm, which can result in the organic fibers in the final vacuum insulation board core material being in single-filament point contact or cross contact, greatly extending the heat conduction path and reducing the thermal conductivity of the core material.

[0112] Furthermore, for purposes of explanation and not limitation, organic fibers that are too short cannot be formed and are unsuitable for the wet process or wet web forming process of this application. Conversely, excessively long organic fibers result in poor dispersion and are also unsuitable for the wet process or wet web forming process of this application.

[0113] In conjunction with the first aspect, in some non-limiting embodiments of this application, the diameter of the organic fiber is from 2 μm 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, or 15 μm.

[0114] In conjunction with the first aspect, in some non-limiting embodiments of this application, the fineness of the organic fibers is from 3 μm to 11 μm.

[0115] In conjunction with the first aspect, in some non-limiting embodiments of this application, the fineness of the organic fibers is 4 μm to 10 μm.

[0116] In the embodiments of this application, the diameter of the organic fibers is 2μm to 15μm, which can result in the organic fibers in the final vacuum insulation board core material being in single-filament point contact or cross contact, greatly extending the heat conduction path and reducing the thermal conductivity of the core material.

[0117] In conjunction with the first aspect, in some non-limiting embodiments of this application, the organic fiber includes at least one selected from polyester fiber, polyolefin fiber (e.g., polyethylene fiber, polypropylene fiber), polyvinyl alcohol fiber, polyacrylonitrile fiber, polystyrene fiber, and polylactic acid fiber. As an example, the organic fiber is a polyester fiber, such as polyethylene terephthalate fiber. As an example, the organic fiber is a polyethylene fiber. As an example, the organic fiber is a polypropylene fiber. As an example, the organic fiber is a combination of polyester fiber and polyvinyl alcohol fiber. As an example, the organic fiber is a combination of polyester fiber, polypropylene fiber, and polyvinyl alcohol fiber.

[0118] In conjunction with the first aspect, in some non-limiting embodiments of this application, the density of the organic core material used in the vacuum insulation panel is 100 g / cm³. 3 Up to 300g / cm 3 Specifically, the density of the organic core material used in the vacuum insulation panel is, for example, 100 g / cm³. 3 110g / cm 3 120g / cm3 130 g / cm 3 140 g / cm 3 150 g / cm 3 160 g / cm 3 170 g / cm 3 180 g / cm 3 190 g / cm 3 200 g / cm 3 210 g / cm 3 220 g / cm 3 230 g / cm 3 240 g / cm 3 250 g / cm 3 260 g / cm 3 270 g / cm 3 280 g / cm 3 290 g / cm 3 300 g / cm 3 .

[0119] In some non-limiting embodiments consistent with the first aspect, the porosity of the organic core material for a vacuum insulation panel is 60% to 95%. Specifically, the porosity of the organic core material for a vacuum insulation panel is, for example, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, or 95%.

[0120] In some non-limiting embodiments consistent with the first aspect, the porosity of the organic core material for a vacuum insulation panel is 70% to 90%.

[0121] In some non-limiting embodiments consistent with the first aspect, the porosity of the organic core material for a vacuum insulation panel is 80% to 90%.

[0122] The core material of the vacuum insulation panel of the present application has a high porosity, can be well vacuumed, and also has a certain strength, and has good heat insulation performance.

[0123] The embodiments of the present application provide an organic core material for a vacuum insulation panel, which has better heat insulation performance than a vacuum insulation panel made of a glass fiber core material. Moreover, the organic core material for a vacuum insulation panel of the present application does not produce pollution during production, and can meet the stringent legal and regulatory requirements in the European Union and other regions.

[0124] In the second aspect, in some non-limiting embodiments of the present application, the present application provides a vacuum insulation panel, which comprises the above-mentioned organic core material for vacuum insulation panel and a packaging film material, and the packaging film material encapsulates the organic core material for vacuum insulation panel.

[0125] The core material of the vacuum insulation panel of the present application has high porosity, can be well vacuumized, and has certain structural strength. The packaging film material of the vacuum insulation panel mainly comprises a polyethylene terephthalate (PET) layer, an aluminum-coated film layer, and a polyethylene (PE) adhesive layer, etc. The packaging film material can well block the penetration of some gases and water vapor, but cannot completely achieve complete isolation.

[0126] Therefore, the vacuum insulation panel of the present application, for example, can have a low thermal conductivity of less than 3.0 mW / (m·K) or less than 1.6 mW / (m·K), and the performance exceeds that of a vacuum insulation panel with a glass fiber core material. Thus, the vacuum insulation panel of the present application has better heat insulation and heat preservation performance than the vacuum insulation panel based on the glass fiber core material, and the core material thereof does not produce pollution in the production process and can be widely used in the fields of heat preservation and insulation, such as refrigerator heat preservation, residential heat preservation, cold storage heat preservation, heat preservation and insulation box heat preservation, water heater heat preservation, microwave oven heat insulation, etc.

[0127] In combination with the second aspect, in some non-limiting embodiments of the present application, the vacuum insulation panel further comprises a desiccant and / or a getter, and the packaging film material encapsulates the organic core material for vacuum insulation panel, the desiccant, and / or the getter.

[0128] For example, the vacuum insulation panel further comprises a desiccant, and the packaging film material encapsulates the organic core material for vacuum insulation panel and the desiccant. For example, based on each vacuum insulation panel, the amount of the desiccant is 1 g to 20 g, such as 1 g, 2 g, 3 g, 4 g, 5 g, 6 g, 7 g, 8 g, 9 g, 10 g, 11 g, 12 g, 13 g, 14 g, 15 g, 16 g, 17 g, 18 g, 19 g, or 20 g. For example, the organic core material for vacuum insulation panel is cut to form a groove, and the groove is suitable for accommodating the desiccant. The desiccant is placed in the groove, the organic core material for vacuum insulation panel and the desiccant are encapsulated by the packaging film material, and the vacuum is extracted before sealing.

[0129] As an example, the vacuum insulation panel further comprises a getter, and the packaging film material encloses the organic core material and the getter of the vacuum insulation panel. As an example, the amount of the getter is 1 g to 10 g, for example, 1 g, 2 g, 3 g, 4 g, 5 g, 6 g, 7 g, 8 g, 9 g, 10 g, based on each vacuum insulation panel. As an example, the vacuum insulation panel is cut to form a recess, and the recess is suitable for accommodating the getter. The getter is placed in the recess, and the packaging film material is used to enclose the organic core material and the getter of the vacuum insulation panel, and the vacuum is extracted and sealed.

[0130] As an example, the vacuum insulation panel further comprises a desiccant and a getter, and the packaging film material encloses the organic core material, the desiccant and the getter of the vacuum insulation panel. As an example, the mass ratio of the desiccant and the getter is (2 to 6): 1, for example, 2:1, 3:1, 4:1, 5:1, or 6:1. Without wishing to be bound by theory, in some non-limiting embodiments of the present application, the packaging film material is used to enclose the organic core material, the desiccant and the getter of the vacuum insulation panel, and the desiccant and the getter can be placed at the same or different positions. As an example, the vacuum insulation panel is cut to form a recess, and the recess is suitable for accommodating the desiccant and the getter. The desiccant and the getter are both placed in the recess, and the packaging film material is used to enclose the organic core material, the desiccant and the getter of the vacuum insulation panel, and the vacuum is extracted and sealed. In one example, the number of recesses is at least one. For example, the number of recesses is 1, and the desiccant and the getter are both placed therein. In another example, the number of recesses is 2, one recess is used to place the desiccant, and the other recess is used to place the getter.

[0131] Referring to FIG. 1, it can be understood that, in some non-limiting embodiments of the present application, the packaging film material 2 is used to enclose the organic core material 1 and the desiccant and the getter 3.

[0132] As an example, the amount of the desiccant is 1 g to 20 g, and the amount of the getter is 1 g to 10 g, based on each vacuum insulation panel (for example, about 1 kg to 3 kg, for example, 2 kg in weight), and the mass ratio of the desiccant and the getter is (2 to 6): 1, for example, 2:1, 3:1, 4:1, 5:1, or 6:1.

[0133] In combination with the second aspect, in some non-limiting embodiments of the present application, the desiccant comprises at least one of calcium carbonate, calcium sulfate, calcium oxide, calcium chloride, magnesium chloride, and barium oxide. As an example, the desiccant is calcium carbonate.

[0134] In some non-limiting embodiments consistent with the second aspect, the getter includes at least one of a barium lithium alloy getter, a palladium oxide getter, and an activated carbon getter. As an example, the getter is a barium lithium alloy getter.

[0135] Generally, the organic core material of the vacuum insulation panel is vacuumed, but residual gas and moisture cannot be completely removed. The use of a desiccant and / or a getter can remove residual gas and moisture in the vacuum insulation panel, and maintain the vacuum degree and the state of no gas and moisture in the vacuum insulation panel for a relatively long period of time, thereby improving the performance of the vacuum insulation panel and prolonging the service life of the vacuum insulation panel.

[0136] In some non-limiting embodiments consistent with the second aspect, the thickness of the vacuum insulation panel is at least 1 mm, such as 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 is at least 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.1 mm, 8.2 mm, 8.3 mm, 8.4 mm, 8.5 mm, 8.6 mm, 8.7 mm, 8.8 mm, 8.9 mm, 9 mm, 9.1 mm, 9.2 mm, 9.3 mm, 9.4 mm, 9.5 mm, 9.6 mm, 9.7 mm, 9.8 mm, 9.9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, or even thicker.

[0137] In some non-limiting embodiments consistent with the second aspect, the vacuum degree inside the vacuum insulation panel is 1 x 10 -4 Pa to 1 x 10 -2 Pa. Specifically, the vacuum degree inside the vacuum insulation panel is 1 x 10 -4 Pa, 2 x 10 -4 Pa, 3 x 10 -4 Pa, 4 x 10 -4 Pa, 5 x 10 -4 Pa, 6 x 10 -4 Pa, 7 x 10 -4 Pa, 8 x 10 -4 Pa, 9 x 10 -4 Pa, 1 x 10 -3 Pa, 2 x 10 -3 Pa, 3 x 10 -3 Pa, 4 x 10 -3Pa, 5 x 10 -3 Pa, 6 x 10 -3 Pa, 7 x 10 -3 Pa, 8 x 10 -3 Pa, 9 x 10 -3 Pa, 1 x 10 -2 Pa.

[0138] In connection with the second aspect, in some non-limiting embodiments of the present application, the thermal conductivity of the vacuum insulation panel can be ≤ 3.0 mW / (m·K). Specifically, the thermal conductivity of the vacuum insulation panel can be ≤ 3.0 mW / (m·K), ≤ 2.90 mW / (m·K), ≤ 2.80 mW / (m·K), ≤ 2.70 mW / (m·K), ≤ 2.60 mW / (m·K), ≤ 2.50 mW / (m·K), ≤ 2.40 mW / (m·K), ≤ 2.30 mW / (m·K), ≤ 2.20 mW / (m·K), ≤ 2.10 mW / (m·K), ≤ 2.0 mW / (m·K), ≤ 1.90 mW / (m·K), ≤ 1.80 mW / (m·K), ≤ 1.70 mW / (m·K), ≤ 1.60 mW / (m·K), ≤ 1.50 mW / (m·K), ≤ 1.40 mW / (m·K), ≤ 1.30 mW / (m·K), ≤ 1.20 mW / (m·K), ≤ 1.10 mW / (m·K), ≤ 1.00 mW / (m·K), ≤ 0.9 mW / (m·K), ≤ 0.8 mW / (m·K), ≤ 0.7 mW / (m·K), ≤ 0.6 mW / (m·K), ≤ 0.5 mW / (m·K), ≤ 0.4 mW / (m·K), ≤ 0.3 mW / (m·K). The thermal conductivity of the vacuum insulation panel is > 0. Optionally, the thermal conductivity of the vacuum insulation panel is ≤ 3.0 mW / (m·K) and ≥ 0.5 mW / (m·K). Optionally, the thermal conductivity of the vacuum insulation panel is ≤ 3.0 mW / (m·K) and ≥ 0.8 mW / (m·K).

[0139] In the third aspect, in some non-limiting embodiments of the present application, the present application provides a method for preparing an organic core material for a vacuum insulation panel, comprising the following steps:

[0140] (1) dispersing organic fibers into a liquid (e.g., water) to obtain an organic fiber suspension;

[0141] (2) forming the organic fibers in the organic fiber suspension into a fiber web, and drying to obtain a fiber non-woven fabric; and

[0142] (3) stacking the fiber non-woven fabric, and then performing heat treatment to obtain the organic core material for the vacuum insulation panel.

[0143] In connection with the third aspect, the manner of forming the organic fibers in the organic fiber suspension into a fiber web includes forming the organic fibers in the organic fiber suspension into a fiber web by a wet process. Optionally, the manner of forming the organic fibers in the organic fiber suspension into a fiber web includes forming the organic fibers in the organic fiber suspension into a fiber web by a wet-laid process, or the organic fibers in the organic fiber suspension are sheeted.

[0144] The term "wet process" as used herein refers to a process in the wet state. For example, for the organic fiber suspension herein, the fibers can be made into a fiber web or a fiber web in the wet state. For example, for the organic fiber suspension herein, the fibers can be sheeted in the wet state.

[0145] For the organic fiber suspension herein, a wet-laid process refers to a process of making the fibers into a fiber web or a fiber web in the wet state. For example, the fibers can be made into a fiber web by settling of a suspension pulp in a former. For example, for the organic fiber suspension herein, the fibers can be wet-laid.

[0146] The present application does not generate dust and fine fibers in the process of preparing the organic core material for vacuum insulation panels, and in the process of cutting and producing the organic core material for vacuum insulation panels, and does not cause environmental pollution and health risks, and meets the regulatory requirements of the European Union and other regions.

[0147] In connection with the third aspect, in some non-limiting embodiments of the present application, the sheeting can be performed using a sheeting machine. The sheeting machine has, for example, a 50-mesh 340 mm x 440 mm wire or other size, model.

[0148] In connection with the third aspect, in some non-limiting embodiments of the present application, the obtained organic core material for vacuum insulation panels can also be cut to the desired shape and size.

[0149] In connection with the third aspect, the present application also provides an organic core material for vacuum insulation panels prepared according to the method of preparing an organic core material for vacuum insulation panels.

[0150] According to some non-limiting embodiments of the present application, in step (1), the organic fibers are dispersed into a liquid (e.g., water) by at least one of mechanical stirring, microwave heating, or ultrasonic.

[0151] According to some non-limiting embodiments of the present application, the mass content of the organic fibers in the organic fiber suspension is 0.005% to 1.0%.

[0152] The mass content of the organic fibers in the organic fiber suspension is 0.005% to 1.0%, which can result in the organic fibers in the finally prepared core material of the vacuum insulation panel being in single-fiber "point contact" or cross contact, greatly extending the heat conduction path and reducing the thermal conductivity of the core material.

[0153] In a fourth aspect, in some non-limiting embodiments of the present application, the present application provides a method for preparing a vacuum insulation panel, comprising the following steps:

[0154] The vacuum insulation panel is sealed with a packaging film material and then vacuumized to obtain the vacuum insulation panel.

[0155] Specifically, in combination with the fourth aspect, a method for preparing a vacuum insulation panel comprises the following steps:

[0156] (1) dispersing organic fibers into a liquid (e.g., water) to obtain an organic fiber suspension;

[0157] (2) forming a fiber web from the organic fibers in the organic fiber suspension, and drying to obtain a fiber cloth;

[0158] (3) stacking the fiber cloth and then performing heat treatment to obtain the organic core material for the vacuum insulation panel; wherein the obtained organic core material for the vacuum insulation panel can be cut into a desired shape and size.

[0159] (4) sealing the organic core material for the vacuum insulation panel with a packaging film material and then vacuumizing to obtain the vacuum insulation panel. Specifically, the organic core material for the vacuum insulation panel can be placed in a bag of the packaging film material, sealed and vacuumized using a vacuum heat sealer, and then sealed after the vacuum degree reaches a target vacuum degree. Alternatively, the organic core material for the vacuum insulation panel, a getter, and a desiccant can be placed in a bag of the packaging film material, sealed and vacuumized using a vacuum heat sealer, and then heat-pressed and sealed after the vacuum degree reaches a target vacuum degree. Further, after the sealed vacuum insulation panel is taken out, the getter shell (or outer packaging) is pressed and punctured to further reduce the internal pressure of the vacuum insulation panel.

[0160] In combination with the fourth aspect, the way of forming a fiber web from the organic fibers in the organic fiber suspension includes forming a fiber web from the organic fibers in the organic fiber suspension by a wet process. Optionally, the way of forming a fiber web from the organic fibers in the organic fiber suspension includes forming a fiber web from the organic fibers in the organic fiber suspension by a wet-laid process, or the organic fibers in the organic fiber suspension are sheeted.

[0161] In some non-limiting embodiments of the fourth aspect, the webbing can be performed using a webbing machine. The webbing machine has, for example, a 50 mesh 340 mm x 440 mm wire or other size, model. The webbing obtained is relatively thin, and multiple layers of the webbing can be stacked to obtain an organic core material for a vacuum insulation panel having a certain target thickness.

[0162] In some non-limiting embodiments of the fourth aspect, in step (1), the organic fibers are dispersed into the liquid (e.g., water) using at least one of mechanical stirring, microwave heating, or ultrasonic.

[0163] In some non-limiting embodiments of the fourth aspect, the mass content of the organic fibers in the organic fiber suspension is 0.005% to 1.0%. Specifically, the mass content of the organic fibers in the organic fiber suspension is 0.005%, 0.006%, 0.007%, 0.008%, 0.009%, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%.

[0164] In some non-limiting embodiments of the fourth aspect, the mass content of the organic fibers in the organic fiber suspension is 0.01% to 0.1%.

[0165] In some non-limiting embodiments of the fourth aspect, the drying temperature is 90°C to 300°C. Specifically, the drying temperature is 90°C, 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, 160°C, 170°C, 180°C, 190°C, 200°C, 210°C, 220°C, 230°C, 240°C, 250°C, 260°C, 270°C, 280°C, 290°C, 300°C.

[0166] In some non-limiting embodiments of the fourth aspect, the drying temperature is 120°C to 250°C.

[0167] In some non-limiting embodiments of the fourth aspect, the drying temperature is 150°C to 230°C.

[0168] In conjunction with the fourth aspect, in some non-limiting embodiments of this application, the drying time is from 1 hour to 36 hours. Specifically, the drying time is 1 hour, 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 7 hours, 8 hours, 9 hours, 10 hours, 11 hours, 12 hours, 13 hours, 14 hours, 15 hours, 16 hours, 17 hours, 18 hours, 19 hours, 20 hours, 21 hours, 22 hours, 23 hours, 24 hours, 25 hours, 26 hours, 27 hours, 28 hours, 29 hours, 30 hours, 31 hours, 32 hours, 33 hours, 34 hours, 35 hours, or 36 hours.

[0169] In conjunction with the fourth aspect, in some non-limiting embodiments of this application, the drying time is 1.5 hours to 12 hours.

[0170] In conjunction with the fourth aspect, in some non-limiting embodiments of this application, the drying time is 1.5 hours to 8 hours.

[0171] As an example, the drying temperature is 90°C to 300°C, and the time is 1 hour to 36 hours. As an example, the drying temperature is 120°C to 250°C, and the time is 1.5 hours to 12 hours. As an example, the drying temperature is 150°C to 230°C, and the time is 1.5 hours to 8 hours.

[0172] In conjunction with the fourth aspect, in some non-limiting embodiments of this application, the areal density of the fiber cloth is 2 g / m². 2 Up to 150g / m 2 Specifically, the areal density of the fiber cloth is 2 g / m³. 2 3g / m 2 4g / m 2 5g / m 2 6g / m 2 7g / m 2 8g / m 2 9g / m 2 10g / m 2 11g / m 2 12g / m 2 13g / m 2 14g / m 2 15g / m 2 16g / m 2 17g / m 2 18g / m 2 19g / m 2 20g / m 2 21g / m 2 22g / m 2 23g / m2 , 24 g / m 2 , 25 g / m 2 , 26 g / m 2 , 27 g / m 2 , 28 g / m 2 , 29 g / m 2 , 30 g / m 2 , 31 g / m 2 , 32 g / m 2 , 33 g / m 2 , 34 g / m 2 , 35 g / m 2 , 36 g / m 2 , 37 g / m 2 , 38 g / m 2 , 39 g / m 2 , 40 g / m 2 , 41 g / m 2 , 42 g / m 2 , 43 g / m 2 , 44 g / m 2 , 45 g / m 2 , 46 g / m 2 , 47 g / m 2 , 48 g / m 2 , 49 g / m 2 , 50 g / m 2 , 51 g / m 2 , 52 g / m 2 , 53 g / m 2 , 54 g / m 2 , 55 g / m 2 , 56 g / m 2 , 57 g / m 2 , 58 g / m 2 , 59 g / m 2 , 60 g / m 2 , 61 g / m 2 , 62 g / m 2 , 63 g / m 2 , 64 g / m 2 , 65 g / m 2 , 66 g / m 2 , 67 g / m 2 , 68 g / m 2 , 69 g / m 2 , 70 g / m 2 , 71 g / m 2 , 72 g / m 2 , 73 g / m 2 , 74 g / m 2 , 75 g / m 2, 76 g / m 2 , 77 g / m 2 , 78 g / m 2 , 79 g / m 2 , 80 g / m 2 , 81 g / m 2 , 82 g / m 2 , 83 g / m 2 , 84 g / m 2 , 85 g / m 2 , 86 g / m 2 , 87 g / m 2 , 88 g / m 2 , 89 g / m 2 , 90 g / m 2 , 91 g / m 2 , 92 g / m 2 , 93 g / m 2 , 94 g / m 2 , 95 g / m 2 , 96 g / m 2 , 97 g / m 2 , 98 g / m 2 , 99 g / m 2 , 100 g / m 2 , 101 g / m 2 , 102 g / m 2 , 103 g / m 2 , 104 g / m 2 , 105 g / m 2 , 106 g / m 2 , 107 g / m 2 , 108 g / m 2 , 109 g / m 2 , 110 g / m 2 , 120 g / m 2 , 130 g / m 2 , 140 g / m 2 , 150 g / m 2 .

[0173] In some non-limiting embodiments consistent with the fourth aspect, the areal density of the fibrous cloth is 5 g / m 2 to 100 g / m 2 .

[0174] In some non-limiting embodiments consistent with the fourth aspect, the fibrous cloth is stacked at least 2 layers in step (3). Specifically, the fibrous cloth is stacked at least 2 layers, 3 layers, 4 layers, 5 layers, 6 layers, 7 layers, 8 layers, 9 layers, 10 layers, 100 layers, 200 layers, 300 layers, 400 layers, 500 layers, etc. in step (3).

[0175] In some embodiments of the fourth aspect, the temperature of the heat treatment is 100-240℃. Specifically, the temperature of the heat treatment is 100℃, 110℃, 120℃, 130℃, 140℃, 150℃, 160℃, 170℃, 180℃, 190℃, 200℃, 210℃, 220℃, 230℃, 240℃.

[0176] In some embodiments of the fourth aspect, the temperature of the heat treatment is 120-220℃.

[0177] In some embodiments of the fourth aspect, the temperature of the heat treatment is 140-200℃.

[0178] In some embodiments of the fourth aspect, the time of the heat treatment is 1-36 hours. Specifically, the time of the heat treatment is 1 hour, 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 7 hours, 8 hours, 9 hours, 10 hours, 11 hours, 12 hours, 13 hours, 14 hours, 15 hours, 16 hours, 17 hours, 18 hours, 19 hours, 20 hours, 21 hours, 22 hours, 23 hours, 24 hours, 25 hours, 26 hours, 27 hours, 28 hours, 29 hours, 30 hours, 31 hours, 32 hours, 33 hours, 34 hours, 35 hours, 36 hours.

[0179] In some embodiments of the fourth aspect, the time of the heat treatment is 1.5-12 hours.

[0180] In some embodiments of the fourth aspect, the time of the heat treatment is 1.5-8 hours.

[0181] For example, the temperature of the heat treatment is 100-240℃, and the time is 1-36 hours. For example, the temperature of the heat treatment is 120-220℃, and the time is 1.5-12 hours. For example, the temperature of the heat treatment is 140-200℃, and the time is 1.5-8 hours.

[0182] In some embodiments of the fourth aspect, the vacuum insulation panel is prepared according to the method for preparing a vacuum insulation panel.

[0183] The present application does not produce dust and fine fibers during the preparation of the vacuum insulation panel, and does not cause environmental pollution and health risks, and meets the regulatory requirements of the European Union and other regions.

[0184] The application uses a specific specification of organic fiber to combine with a wet-laid process to obtain an organic core material for a vacuum insulation panel and a vacuum insulation panel with a better thermal conductivity, a lighter texture, a good heat insulation effect, safety, and no pollution.

[0185] In a fifth aspect, in some non-limiting embodiments of the present application, the present application provides a heat insulation device, which comprises the above-mentioned organic core material for a vacuum insulation panel or the above-mentioned vacuum insulation panel.

[0186] In combination with the fifth aspect, in some non-limiting embodiments of the present application, the heat insulation device is a refrigerator. The above-mentioned organic core material for a vacuum insulation panel or the above-mentioned vacuum insulation panel can be used in the heat insulation components of the refrigerator to achieve a heat insulation effect.

[0187] In combination with the fifth aspect, in some non-limiting embodiments of the present application, the heat insulation device is a heat preservation box. The above-mentioned organic core material for a vacuum insulation panel or the above-mentioned vacuum insulation panel can be used in the heat insulation components of the heat preservation box to achieve a heat insulation effect.

[0188] In combination with the fifth aspect, in some non-limiting embodiments of the present application, the heat insulation device is a water heater. The above-mentioned organic core material for a vacuum insulation panel or the above-mentioned vacuum insulation panel can be used in the heat insulation components of the water heater to achieve a heat insulation effect.

[0189] In combination with the fifth aspect, in some non-limiting embodiments of the present application, the heat insulation device is a microwave oven. The above-mentioned organic core material for a vacuum insulation panel or the above-mentioned vacuum insulation panel can be used in the heat insulation components of the microwave oven to achieve a heat insulation effect.

[0190] In combination with the fifth aspect, in some non-limiting embodiments of the present application, the heat insulation device is a container. The above-mentioned organic core material for a vacuum insulation panel or the above-mentioned vacuum insulation panel can be used in the heat insulation components of the container (such as a refrigerated container, a cold chain transport container) to achieve a heat insulation effect.

[0191] In combination with the fifth aspect, in some non-limiting embodiments of the present application, the heat insulation device is a building wallboard. The above-mentioned organic core material for a vacuum insulation panel or the above-mentioned vacuum insulation panel can be used in the heat insulation components of the building wallboard (such as a residential wall, etc.) to achieve a heat insulation effect.

[0192] In combination with the fifth aspect, in some non-limiting embodiments of the present application, the heat insulation device is a cold storage. The above-mentioned organic core material for a vacuum insulation panel or the above-mentioned vacuum insulation panel can be used in the heat insulation components of the cold storage to achieve a heat insulation effect.

[0193] The present application uses organic fiber material to replace fumed silica or glass fiber, and applies it to the main body material of the vacuum insulation panel core material, overcoming the problems of high cost, environmental hazards and inability to achieve low thermal conductivity. The efficient single fiber suspension dispersion of the organic fiber creates conditions for low grammage of the non-woven fabric after wet-laid, and point contact or cross contact between organic fiber filaments, while the high rigidity of the fiber material provides support for the three-dimensional network structure of the vacuum insulation panel core material. Heat transfer occurs in the three-dimensional network architecture of the fiber, making full use of the low intrinsic thermal conductivity of the organic fiber and the three-dimensional structure of the point contact or cross contact to infinitely increase the heat conduction path, ultimately preparing a vacuum insulation panel with low thermal conductivity.

[0194] It can be understood that the vacuum insulation panel of the present application uses a specific specification of organic fiber, has high porosity, optimal thermal conductivity, and light texture, and can achieve good thermal insulation effect. The present application does not produce dust and fine fibers during the preparation of the vacuum insulation panel, and during the cutting and processing and production of the organic core material for the vacuum insulation panel, there is no environmental pollution and health risk, which meets the regulatory requirements of the European Union and other regions.

[0195] The technical solutions of the present application will be better understood in combination with the specific embodiments below.

[0196] Example 1

[0197] In this embodiment, an organic core material for a vacuum insulation panel and a vacuum insulation panel are prepared.

[0198] The specific preparation method is as follows:

[0199] (1) Disperse PET (polyethylene terephthalate) fibers with a diameter of 7 μm and a length of 1 mm into water, and uniformly disperse by mechanical stirring to prepare a fiber suspension with a fiber mass content of 0.05% concentration (slurry concentration);

[0200] (2) Control water for 5 min by wet-laid process, and place in a 120°C oven for baking for 2h to demold to obtain a fiber cloth with an area density of 15 g / m 2

[0201] (3) Stack the fiber cloth (300 layers) into a core material, and bake in an oven at 140°C for 2h to obtain an organic core material for a vacuum insulation panel;

[0202] (4) Package the organic core material for a vacuum insulation panel, add 1 adsorbent (3.5g / each) and 1 package of desiccant (15g / package), and then place it in a vacuum packaging machine to vacuum, vacuum to 3.5x10 -3 Pa, and then heat seal and seal, heat sealing time 15s, heat sealing voltage 13V;

[0203] ​(5) Take out the vacuum insulation board after sealing, press and pierce the getter shell, further reduce the pressure in the vacuum insulation board, and obtain the vacuum insulation board.

[0204] The thermal conductivity is tested after the vacuum insulation board is placed at room temperature for 12 h. The organic fibers in the vacuum insulation board are single filament point contact.

[0205] Example 2

[0206] An organic core material for a vacuum insulation board and a vacuum insulation board are prepared in this example.

[0207] The specific preparation method is as follows:

[0208] (1) PET fibers with a diameter of 7 μm and a length of 12 mm are dispersed in water, and uniformly dispersed by mechanical stirring to prepare a fiber suspension with a fiber mass content of 0.05% concentration (slurry concentration);

[0209] (2) After 5 minutes of water control by wet laying, it is placed in a 120°C oven for 2 hours of baking to obtain a fiber cloth with an area density of 15 g / m 2

[0210] (3) The fiber cloth is stacked (300 layers) into a core material, and baked in an oven at 140°C for 2 hours to obtain an organic core material for a vacuum insulation board;

[0211] (4) The organic core material for a vacuum insulation board is bagged, 1 getter (3.5 g each) and 1 package of desiccant (15 g per package) are added, and then placed in a vacuum packaging machine to extract vacuum. After the vacuum degree reaches 3.5*10 -3 Pa, heat sealing for 15 s and heat sealing voltage of 13 V;

[0212] (5) Take out the vacuum insulation board after sealing, press and pierce the getter shell, further reduce the pressure in the vacuum insulation board, and obtain the vacuum insulation board.

[0213] The thermal conductivity is tested after the vacuum insulation board is placed at room temperature for 12 h. The organic fibers in the vacuum insulation board are single filament point contact.

[0214] Example 3

[0215] An organic core material for a vacuum insulation board and a vacuum insulation board are prepared in this example.

[0216] The specific preparation method is as follows:

[0217] (1) PET fibers with a diameter of 7 μm and a length of 12 mm are dispersed in water, and uniformly dispersed by mechanical stirring to prepare a fiber suspension with a fiber mass content of 0.05% concentration (slurry concentration);

[0218] ​(2) After water control for 5 minutes by wet-laid method, the sample was placed in an oven at 120°C for 2 hours for baking and demolding to obtain a fiber cloth with an area density of 15 g / m 2 fibrous cloth;

[0219] (3) The fiber cloths were stacked (300 layers) into a core material, which was baked in an oven at 140°C for 1 hour to obtain an organic core material for vacuum insulation panels;

[0220] (4) The organic core material for vacuum insulation panels was bagged, 1 adsorbent (3.5 g per piece) and 1 desiccant (15 g per piece) were added, and then the sample was placed in a vacuum packaging machine for vacuumizing, and the vacuum degree reached 3.5*10 -3 Pa, and then hot-pressing sealing was performed, with a hot-sealing time of 15 s and a hot-sealing voltage of 13 V;

[0221] (5) The vacuum insulation panel after sealing was taken out, the adsorbent shell was pressed and punctured to further reduce the internal pressure of the vacuum insulation panel, and the vacuum insulation panel was obtained.

[0222] The thermal conductivity of the vacuum insulation panel was tested after being placed at room temperature for 12 hours. The organic fibers in the vacuum insulation panel were single-fiber point contact.

[0223] Example 4

[0224] An organic core material for vacuum insulation panels and a vacuum insulation panel were prepared in this example.

[0225] The specific preparation method is as follows:

[0226] (1) PET fibers with a diameter of 15 μm and a length of 5 mm were dispersed in water, and uniformly dispersed by mechanical stirring to prepare a fiber suspension with a fiber mass content of 0.05% (slurry concentration);

[0227] (2) After water control for 5 minutes by wet-laid method, the sample was placed in an oven at 120°C for 2 hours for baking and demolding to obtain a fiber cloth with an area density of 15 g / m 2 fibrous cloth;

[0228] (3) The fiber cloths were stacked (300 layers) into a core material, which was baked in an oven at 140°C for 2 hours to obtain an organic core material for vacuum insulation panels;

[0229] (4) The organic core material for vacuum insulation panels was bagged, 1 adsorbent (3.5 g per piece) and 1 desiccant (15 g per piece) were added, and then the sample was placed in a vacuum packaging machine for vacuumizing, and the vacuum degree reached 3.5*10 -3 Pa, and then hot-pressing sealing was performed, with a hot-sealing time of 15 s and a hot-sealing voltage of 13 V;

[0230] (5) The vacuum insulation panel after sealing was taken out, the adsorbent shell was pressed and punctured to further reduce the internal pressure of the vacuum insulation panel, and the vacuum insulation panel was obtained.

[0231] The thermal conductivity of the vacuum insulation panel was tested after the vacuum insulation panel was placed at room temperature for 12 hours. The organic fibers in the vacuum insulation panel are single-filament point contact.

[0232] Example 5

[0233] An organic core material for a vacuum insulation panel and a vacuum insulation panel were prepared in this example.

[0234] The specific preparation method is as follows:

[0235] (1) PET fibers with a diameter of 7 μm and a length of 5 mm were dispersed in water, and uniformly dispersed by mechanical stirring, to prepare a fiber suspension with a fiber mass content of 0.01% concentration (slurry concentration);

[0236] (2) The water was controlled for 5 minutes by wet-laid process, and placed in a 120°C oven for baking for 2 hours, to perform demolding to obtain a fiber cloth with an area density of 5 g / m 2

[0237] (3) The fiber cloth was stacked (300 layers) into a core material, and baked in an oven at 200°C for 2 hours, to obtain an organic core material for a vacuum insulation panel;

[0238] (4) The organic core material for a vacuum insulation panel was bagged, 1 adsorbent (3.5 g per piece) and 1 package of desiccant (15 g per package) were added, and then placed in a vacuum packaging machine to perform vacuumization, and the vacuum degree reached 3.5*10 -3 Pa, and then hot-pressed and sealed, with a hot sealing time of 15 s and a hot sealing voltage of 13 V;

[0239] (5) The vacuum insulation panel after sealing was taken out, and the adsorbent shell was pressed and pierced, to further reduce the internal pressure of the vacuum insulation panel, and obtain the vacuum insulation panel.

[0240] The thermal conductivity of the vacuum insulation panel was tested after the vacuum insulation panel was placed at room temperature for 12 hours. The organic fibers in the vacuum insulation panel are single-filament point contact. The contact mode between the physically contacted organic fibers is all point contact or cross contact, without line contact or side-by-side contact between the fibers. FIG. 2 is a micro-morphology diagram of the fiber cloth prepared in this example, magnified by 20 times.

[0241] Example 6

[0242] An organic core material for a vacuum insulation panel and a vacuum insulation panel were prepared in this example.

[0243] The specific preparation method is as follows:

[0244] (1) PET fibers with a diameter of 7 μm and a length of 5 mm were dispersed in water, and uniformly dispersed by mechanical stirring, to prepare a fiber suspension with a fiber mass content of 0.01% concentration (slurry concentration); ​

[0245] (2) After wet laying and controlling water for 5 minutes, the sample was placed in an oven at 120°C for 2 hours for baking and demolding to obtain a fiber cloth with an area density of 100 g / m 2 fiber cloth;

[0246] (3) The fiber cloths were stacked (300 layers) into a core material, which was baked in an oven at 200°C for 2 hours to obtain an organic core material for a vacuum insulation panel;

[0247] (4) The organic core material for a vacuum insulation panel was bagged, 1 adsorbent (3.5 g per piece) and 1 package of desiccant (15 g per package) were added, and then the sample was placed in a vacuum packaging machine for vacuumizing, and the vacuum degree reached 3.5*10 -3 Pa, and then hot-pressing sealing was performed, the hot-sealing time was 15 s, and the hot-sealing voltage was 13 V;

[0248] (5) The vacuum insulation panel after sealing was taken out, the adsorbent shell was pressed and pierced, and the internal pressure of the vacuum insulation panel was further reduced to obtain the vacuum insulation panel.

[0249] The vacuum insulation panel was placed at room temperature for 12 hours, and the thermal conductivity was tested. The organic fiber in the vacuum insulation panel was single-filament point contact.

[0250] Example 7

[0251] An organic core material for a vacuum insulation panel and a vacuum insulation panel were prepared in this example.

[0252] The specific preparation method is as follows:

[0253] (1) PET fibers with a diameter of 7 μm and a length of 5 mm were dispersed in water, and uniformly dispersed by mechanical stirring to prepare a fiber suspension with a fiber mass content of 0.05% concentration (slurry concentration);

[0254] (2) After wet laying and controlling water for 5 minutes, the sample was placed in an oven at 120°C for 2 hours for baking and demolding to obtain a fiber cloth with an area density of 50 g / m 2 fiber cloth;

[0255] (3) The fiber cloths were stacked (310 layers) into a core material, which was baked in an oven at 200°C for 2 hours to obtain an organic core material for a vacuum insulation panel;

[0256] (4) The organic core material for a vacuum insulation panel was bagged, 1 adsorbent (3.5 g per piece) and 1 package of desiccant (15 g per package) were added, and then the sample was placed in a vacuum packaging machine for vacuumizing, and the vacuum degree reached 3.5*10 -3 Pa, and then hot-pressing sealing was performed, the hot-sealing time was 15 s, and the hot-sealing voltage was 13 V;

[0257] (5) Take out the vacuum insulation board after sealing, press and pierce the getter shell, further reduce the pressure in the vacuum insulation board, and obtain the vacuum insulation board.

[0258] The thermal conductivity is tested after the vacuum insulation board is placed at room temperature for 12 h. The organic fibers in the vacuum insulation board are single filament point contact.

[0259] Example 8

[0260] An organic core material for a vacuum insulation board and a vacuum insulation board are prepared in this example.

[0261] The specific preparation method is as follows:

[0262] (1) Disperse polyvinyl alcohol fibers with a diameter of 10 μm and a length of 3 mm into water, uniformly disperse by mechanical stirring, and prepare a fiber suspension with a fiber mass content of 0.05% concentration (slurry concentration);

[0263] (2) Control water for 5 min by wet-laid process, place in a 120°C oven for 2 h for baking, and demold to obtain a fiber cloth with an area density of 50 g / m 2

[0264] (3) Stack the fiber cloth (320 layers) into a core material, bake in an oven at 160°C for 2 h, and obtain an organic core material for a vacuum insulation board;

[0265] (4) Package the organic core material for a vacuum insulation board, add 1 getter (3.5 g / each) and 1 desiccant (15 g / pack), and place in a vacuum packaging machine to vacuumize. After the vacuum degree reaches 3.5*10 -3 Pa, heat seal for 15 s, and heat seal at 13 V;

[0266] (5) Take out the vacuum insulation board after sealing, press and pierce the getter shell, further reduce the pressure in the vacuum insulation board, and obtain the vacuum insulation board.

[0267] The thermal conductivity is tested after the vacuum insulation board is placed at room temperature for 12 h. The organic fibers in the vacuum insulation board are single filament point contact.

[0268] Example 9

[0269] An organic core material for a vacuum insulation board and a vacuum insulation board are prepared in this example.

[0270] The specific preparation method is as follows:

[0271] (1) Disperse mixed fibers (PET fibers and polyacrylonitrile fibers with a mass ratio of 1:1) with a diameter of 10 μm and a length of 3 mm into water, uniformly disperse by mechanical stirring, and prepare a fiber suspension with a fiber mass content of 0.05% concentration (slurry concentration); ​

[0272] (2) Control the water for 5 min by wet-laid process, and place in an oven at 120°C for 2h to perform baking, and perform demolding to obtain a fiber cloth with an area density of 15 g / m 2 fibrous cloth;

[0273] (3) Place the fiber cloth stack (280 layers) as the core material, and perform baking in an oven at 220°C for 2h to obtain an organic core material for vacuum insulation panels;

[0274] (4) Place the organic core material for vacuum insulation panels into a vacuum packaging machine after bagging, adding 1 adsorbent (3.5g per piece) and 1 package of desiccant (15g per package), and perform vacuumizing, and the vacuum degree reaches 3.5*10 -3 Pa, and perform heat sealing after heat pressing, and the heat sealing time is 15s, and the heat sealing voltage is 13V;

[0275] (5) Take out the vacuum insulation panel after sealing, perform pressing and puncturing the adsorbent shell to further reduce the pressure in the vacuum insulation panel, and obtain the vacuum insulation panel.

[0276] Place the vacuum insulation panel at room temperature for 12h, and test the thermal conductivity. The organic fiber in the vacuum insulation panel is single filament point contact.

[0277] Comparative Example 1

[0278] The glass fiber with a diameter of 15μm and a length of 5mm is used in this comparative example, and the area density of the fiber cloth is controlled to be 15g / m 2 in step (2), and the remaining process is the same as that in Example 4.

[0279] Comparative Example 2

[0280] The PET fiber with a diameter of 7μm and a length of 25mm is used in this comparative example, and the area density of the fiber cloth is controlled to be 5g / m 2 in step (2), and the remaining process is the same as that in Example 5. FIG. 3 is a micro-morphology diagram of the fiber cloth prepared in this comparative example, which is enlarged by 20 times.

[0281] Comparative Example 3

[0282] The PET fiber with a diameter of 1μm and a length of 5mm is used in this comparative example, and the area density of the fiber cloth is controlled to be 5g / m 2 in step (2), and the remaining process is the same as that in Example 5.

[0283] The properties of the products prepared in each example and comparative example are shown in Table 1 below.

[0284] Table 1

[0285] The thermal conductivity is measured according to the national standard GB / T 10294 / 10295 by using the steady-state heat flow method.

[0286] As can be seen from Table 1, the vacuum insulation board prepared in the application has a better thermal conductivity. Under the same conditions, the thermal conductivity of the vacuum insulation board prepared by using glass fiber is significantly poorer than that of the application.

[0287] Too long organic fibers will result in poor thermal conductivity. Too small fiber diameter will result in poor dispersion of fiber material, which cannot spread in liquid or water, forming agglomeration points, resulting in poor thermal conductivity. In addition, through experiments, if 0.5mm long organic fibers are used, the wire screen or wet laid method cannot be performed.

[0288] The internal vacuum degree of the vacuum insulation board is low, and in some actual scenarios, the temperature is not higher than 40℃, the air convection heat transfer and thermal radiation heat transfer are weak, and the fiber solid phase contact heat transfer dominates in the vacuum insulation board. Solid phase heat transfer is mainly affected by the intrinsic thermal conductivity of the material, the heat flow path and the cross-sectional area. Under different fiber parameters, the micro-lap and contact of the fibers are very different, the point contact or cross contact between the fibers in Figure 2 is more significant, the heat flow path is lengthened, the fiber interfacial area is reduced, and the heat transfer is more difficult, and the thermal conductivity is lower.

[0289] The above describes the application in detail in combination with the embodiments, but the application is not limited to the above embodiments, and various changes can be made within the knowledge range of ordinary skilled persons in the art without departing from the purpose of the application. Industrial applicability

[0290] The vacuum insulation board of the application has good heat preservation and insulation performance, and can be widely used in the fields of refrigerator heat preservation, residential heat preservation, cold storage heat preservation, heat preservation and insulation box heat preservation, water heater heat preservation, microwave oven heat insulation, etc. It has industrial applicability.

Claims

1. An organic core material for a vacuum insulation panel, comprising organic fibers and having a thermal conductivity of ≤3.0 mW / (m·K).

2. The organic core material for vacuum insulation panels according to claim 1, wherein, The thermal conductivity of the organic core material used in the vacuum insulation panel is greater than 0 and less than or equal to 1.5 mW / (m·K).

3. The organic core material for vacuum insulation panels according to claim 2, wherein, The thermal conductivity of the organic core material used in the vacuum insulation panel is greater than 0.3 mW / (m·K) and less than or equal to 1.3 mW / (m·K).

4. The organic core material for vacuum insulation panels according to any one of claims 1 to 3, wherein, The organic fibers are in point contact or cross contact with each other.

5. The organic core material for vacuum insulation panels according to any one of claims 1 to 4, wherein, The organic fibers have a length of 1 mm to 12 mm.

6. The organic core material for a vacuum insulation panel according to any one of claims 1 to 5, wherein, The organic fibers have a diameter of 2 μm to 15 μm.

7. The organic core material for a vacuum insulation panel according to any one of claims 1 to 6, 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.

8. The organic core material for vacuum insulation panels according to any one of claims 1 to 7, having a content of 100 g / cm³ 3 Up to 300g / cm 3 The density.

9. The organic core material for vacuum insulation panels according to any one of claims 1 to 8, having a porosity of 60% to 95%.

10. A vacuum insulation panel comprising an organic core material for a vacuum insulation panel according to any one of claims 1 to 9, and a packaging film, wherein the packaging film encapsulates the organic core material for the vacuum insulation panel.

11. The vacuum insulation panel according to claim 10, further comprising at least one of a desiccant and a getter, wherein the packaging film encapsulates the organic core material of the vacuum insulation panel and at least one of the desiccant and getter.

12. The vacuum insulation panel according to claim 11, wherein, The desiccant includes at least one of calcium carbonate, calcium sulfate, calcium oxide, calcium chloride, magnesium chloride, and barium oxide.

13. The vacuum insulation panel according to claim 11 or 12, wherein, The getter includes at least one of barium-lithium alloy getter, palladium oxide getter, and activated carbon getter.

14. The vacuum insulation panel according to any one of claims 10 to 13, having a thickness of at least 1 mm.

15. The vacuum insulation panel according to any one of claims 10 to 14, having a 1×10 -4 Pa to 1×10 -2 Vacuum degree in Pa.

16. A method for preparing an organic core material for a vacuum insulation panel according to any one of claims 1 to 9, comprising the following steps: (1) Disperse organic fibers into a liquid to obtain an organic fiber suspension; (2) The organic fibers in the organic fiber suspension are formed into a fiber web and dried to obtain a fiber cloth; as well as (3) The fiber cloth is stacked and then heat-treated to obtain the organic core material for the vacuum insulation board.

17. The method according to claim 16, wherein, In step (1), organic fibers are dispersed into the liquid by at least one of mechanical stirring, microwave heating or ultrasound to obtain an organic fiber suspension.

18. The method according to claim 16 or 17, wherein, The organic fiber suspension contains 0.005% to 1.0% organic fiber by mass.

19. The method according to any one of claims 16 to 18, wherein, The drying temperature is between 90°C and 300°C.

20. The method according to any one of claims 16 to 19, wherein, The drying time is from 1 hour to 36 hours.

21. The method according to any one of claims 16 to 20, wherein, The fiber cloth has a density of 2g / m 2 Up to 150g / m 2 Surface density.

22. The method according to any one of claims 16 to 21, wherein, In step (3), the fiber cloth is stacked at least 2 layers.

23. The method according to any one of claims 16 to 22, wherein, The heat treatment temperature is between 100°C and 240°C.

24. The method according to any one of claims 16 to 23, wherein, The heat treatment time is from 1 hour to 36 hours.

25. A method for preparing a vacuum insulation panel according to any one of claims 10 to 15, comprising the following steps: The vacuum insulation panel is obtained by encapsulating it with an organic core material and a packaging film, followed by vacuuming.

26. A heat insulation device, comprising an organic core material for a vacuum insulation panel as described in any one of claims 1 to 9 or a vacuum insulation panel as described in any one of claims 10 to 15; and wherein the heat insulation device comprises a refrigerator, a heat preservation box, a water heater, a microwave oven, a container, or a building wall panel.

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