Thermal insulation material and preparation method and application thereof

Abstract

The invention provides a thermal insulation material and a preparation method and application thereof, and belongs to the technical field of functional materials. The heat insulation material comprises fiber groups which are stacked in a crossed mode, every two adjacent layers of fiber groups intersect with each other when stacked, the intersection angle is the intersection angle, and the intersection angle ranges from 35 degrees to 90 degrees. According to the invention, through a specific cross stacking mode, the layers of the fiber groups are not mutually nested, so that the porosity is improved, the heat conductivity coefficient is reduced, and the thermal insulation material with an excellent thermal insulation effect is obtained. The invention also provides a preparation method and application of the thermal insulation material.

Description

Technical Field

[0001] The invention belongs to the technical field of functional materials, and in particular relates to a thermal insulation material and a preparation method and application thereof. Background Art

[0002] In recent years, how to provide an insulation material with good insulation performance has been a difficult problem in the industry. Among them, vacuum insulation panels are a new type of insulation board that has developed rapidly in recent years. They use the high vacuum inside to reduce air heat convection, the low thermal conductivity core material to reduce solid heat conduction, and the high reflective barrier film to increase the inhibitory effect on radiation convection. At the same time, they play the role of water and air isolation to maintain the vacuum degree, so that the internal heat transfer is reduced to the minimum, becoming the material with the lowest thermal conductivity suitable for refrigerators. On the market, the general thermal conductivity of vacuum insulation panels with glass fiber as the core material is 2mW / (m·K), and the thermal conductivity of products with aerogel materials as the core material is 4-5mW / (m·K). However, these vacuum insulation panels with inorganic materials as the core material have relatively high prices, dust pollution in the production process, difficulty in recycling glass fiber after the product is discarded, and irritation to people. For the best insulation effect, the lower the thermal conductivity of the VIP used in the refrigerator, the better. The price of organic fiber is significantly lower than that of glass fiber, it is non-irritating to the human body, and the solid phase conductivity of organic blocks is much lower than that of glass. Therefore, organic fiber can be used to replace glass fiber to solve the problems of existing glass fiber core materials and obtain products with better thermal insulation effects.

[0003] However, the organic fibers currently used are made by stacking a large number of non-woven fabrics. In order to obtain the lowest possible thermal conductivity, the selected fiber diameter is relatively thin in order to reduce its solid-phase heat conduction. Organic fibers are soft and have poor rigidity. The smaller the fiber diameter, the more the vacuum insulation panel is made. The fiber is compressed, the porosity decreases, and the thermal insulation capacity decreases. The use of large-diameter fibers has high solid-phase thermal conductivity, but good thermal insulation capacity cannot be obtained. In addition, there is an optimal fiber arrangement direction in the non-woven fabric production process, and the number of warp fibers is much larger than the number of weft fibers (the warp is the direction of forming and winding during fiber production, and the weft is perpendicular to the warp fibers). Therefore, after the two types of thick and thin fibers are stacked, the thermal insulation capacity is limited due to the overlapping filling of the warp fibers. Summary of the invention

[0004] The present invention aims to solve one of the above-mentioned technical problems existing in the prior art. To this end, one of the purposes of the present invention is to provide a thermal insulation material, which controls the stacking mode between fiber groups so that angles are formed between layers to obtain the best thermal insulation capacity.

[0005] A second object of the present invention is to provide a method for preparing the above-mentioned thermal insulation material.

[0006] A third object of the present invention is to provide a thermal insulation core material comprising the above-mentioned thermal insulation material.

[0007] A fourth object of the present invention is to provide an insulating board material comprising the above-mentioned insulating core material.

[0008] A fifth object of the present invention is to provide a method for preparing the above-mentioned thermal insulation board.

[0009] A sixth object of the present invention is to provide a temperature regulating device.

[0010] In order to achieve the above object, the technical solution adopted by the present invention is:

[0011] A first aspect of the present invention provides a thermal insulation material comprising cross-stacked fiber groups, wherein each two adjacent layers of the fiber groups cross each other when stacked, and the angle of the cross is a cross angle, which is 35 to 90 degrees.

[0012] The present invention controls the stacking mode between fiber groups so that the layers are crossed and the fiber layers are not nested with each other, thereby increasing the porosity and reducing the thermal conductivity, thereby obtaining an insulating material with excellent thermal insulation effect. The fiber groups of the present invention are not nested with each other, and when the insulating board is prepared by vacuum compression, the structure will not collapse, thereby effectively solving the problem of poor thermal insulation performance of the existing fiber insulation board.

[0013] The fiber group of the present invention has an optimal arrangement direction during the arrangement process, and the number of fibers arranged in the optimal arrangement direction is much greater than the number of fibers not arranged in the optimal arrangement direction. Taking non-woven fabric as an example, during production, the fibers are arranged in a directional manner, and this direction is the optimal arrangement direction of the fibers. After the fibers are produced and formed, they are generally rolled up in the optimal arrangement direction of the fibers.

[0014] When the crossing angle is 90°, two adjacent fiber groups are stacked orthogonally; when there is no crossing, that is, the crossing angle is 0°, when the arrangement directions of two adjacent fiber groups are parallel to each other, the two adjacent fiber groups are stacked in parallel. When the crossing angle is between 35° and 90°, the thermal conductivity of the material is small and the thermal insulation performance is good; the closer the crossing angle is to 90°, that is, the closer to orthogonal stacking, the smaller the thermal conductivity of the material and the better the thermal insulation performance.

[0015] In some specific embodiments of the present invention, the fibers in the fiber group include thin fibers and coarse fibers having a diameter thicker than that of the thin fibers.

[0016] In some specific embodiments of the present invention, the diameter ratio of the coarse fiber to the fine fiber is greater than or equal to 2; in some specific embodiments of the present invention, the diameter ratio of the coarse fiber to the fine fiber is 2-50.

[0017] In some specific embodiments of the present invention, the diameter of the thin fiber is 1 to 25 μm; in some specific embodiments of the present invention, the diameter of the coarse fiber is 4 to 20 μm.

[0018] In some specific embodiments of the present invention, the diameter of the coarse fiber is greater than or equal to 10 μm; in some specific embodiments of the present invention, the diameter of the coarse fiber is 10 to 100 μm.

[0019] In some specific embodiments of the present invention, the gram weight of the crude fiber is 8 to 50 g / m 2 .

[0020] In some specific embodiments of the present invention, the weight of the fine fibers is 8 to 50 g / m 2 .

[0021] In some specific embodiments of the present invention, the cross-stacking is a cross-stacking of a coarse fiber group and a fine fiber group, the coarse fiber group consists of the coarse fibers, and the fine fiber group consists of the fine fibers.

[0022] Furthermore, the present invention stacks coarse fibers and fine fibers of different diameters. The coarse fibers have a larger diameter and greater rigidity, and can maintain a smaller deformation when subjected to external forces, thereby avoiding collapse of the material structure and maintaining a larger porosity. The fine fibers can effectively reduce the solid-phase thermal conductivity of the material. Through the mutual cooperation of the coarse fibers and the fine fibers, the obtained insulation material has higher rigidity, can maintain a higher porosity, and has a lower thermal conductivity, further improving the thermal insulation effect of the insulation material.

[0023] In some specific embodiments of the present invention, the shape of the fibers in the fiber group includes at least one of a circular shape, a triangular shape, a clover shape, an elliptical shape, a T shape, or a Y shape.

[0024] In some specific embodiments of the present invention, the fibers in the fiber group are selected from organic fibers.

[0025] In some specific embodiments of the present invention, the organic fiber includes at least one of polyester, polypropylene, polyethylene, polystyrene, butadiene or styrene fibers.

[0026] In some specific embodiments of the present invention, the number of cross-stacked layers is 50 to 1000.

[0027] In some specific embodiments of the present invention, the thickness of the thermal insulation material is 3 to 30 mm.

[0028] The second aspect of the present invention provides a method for preparing the thermal insulation material described in the first aspect of the present invention, comprising the following steps: cross-stacking the fiber groups to obtain the thermal insulation material.

[0029] A third aspect of the present invention provides a thermal insulation core material comprising the thermal insulation material according to the first aspect of the present invention.

[0030] The heat-insulating core material provided by the present invention has higher porosity, lower thermal conductivity and excellent heat-insulating effect.

[0031] A fourth aspect of the present invention provides an insulation board material comprising the insulation core material according to the third aspect of the present invention, wherein the insulation board material comprises the insulation core material and a barrier film coated outside the insulation core material.

[0032] The heat insulating board material provided by the present invention has higher porosity, lower thermal conductivity and excellent heat preservation effect.

[0033] In some specific embodiments of the present invention, the barrier film in the thermal insulation board includes at least one of a double-sided aluminum-plated film, a yin-yang film, or a double-sided aluminum-free film.

[0034] The fifth aspect of the present invention provides a method for preparing the thermal insulation board material according to the fourth aspect of the present invention, comprising the following steps: placing the thermal insulation core material into a barrier film, and obtaining the thermal insulation board material after vacuum packaging.

[0035] In some specific embodiments of the present invention, in the method for preparing the thermal insulation board, the vacuum degree of vacuum packaging is 0.0003-10Pa.

[0036] In some specific embodiments of the present invention, in the method for preparing the thermal insulation board, the vacuuming time of the vacuum packaging is 8 to 140 minutes.

[0037] The sixth aspect of the present invention provides a temperature regulating device, which comprises at least one of the insulation material described in the first aspect of the present invention, the insulation core material described in the third aspect of the present invention, or the insulation board material described in the fourth aspect of the present invention.

[0038] The thermal insulation material, thermal insulation core material, and thermal insulation board provided by the present invention have higher porosity, lower thermal conductivity, and excellent thermal insulation effect. The temperature regulating device including the thermal insulation material, the thermal insulation core material or the thermal insulation board has a good temperature regulating effect.

[0039] In some specific embodiments of the present invention, the temperature regulating device includes at least one of a refrigeration device, a building insulation device, or a liquefied natural gas transportation device.

[0040] In some specific embodiments of the present invention, the refrigeration device includes at least one of a refrigerator, a freezer, a cold storage or an air conditioner.

[0041] The beneficial effect of the present invention is that: the present invention uses a specific cross-stacking method to prevent the fiber groups from being nested with each other, thereby increasing the porosity and reducing the thermal conductivity, thereby obtaining an insulating material with excellent thermal insulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the stacking method between fiber group layers in the prior art.

[0043] Figure 2 It is a schematic diagram of the stacking method between fiber group layers in some embodiments of the present invention.

[0044] Figure 3 Schematic diagram of the intersection angle in some embodiments of the present invention.

[0045] Figure 4 A 经 A 纬 SEM image of the thermal insulation material produced as the smallest fiber stacking unit.

[0046] Figure 5 B 经 B 纬 SEM image of the thermal insulation material produced as the smallest fiber stacking unit. DETAILED DESCRIPTION

[0047] In the prior art, organic synthetic fibers, such as non-woven fabrics, have an optimal fiber arrangement direction. After the fibers are produced and formed, they are generally rolled up in the optimal fiber arrangement direction. The number of fibers in the optimal arrangement direction is much greater than the number of fibers in the non-optimal arrangement direction. The schematic diagram of the stacking method between fiber groups in the prior art is as follows: Figure 1 As shown in FIG. 1 , if the optimal fiber arrangement direction is the warp direction and the direction perpendicular to the warp direction is the weft direction, the number of warp fibers is much greater than the number of weft fibers. In the prior art, when the fiber groups are stacked, they are stacked in parallel in the same direction, such as Figure 1 As shown, the A fiber (fine fiber) group is optimally arranged in the warp direction, denoted as A 经 , stacked on the A fiber group is the B fiber (coarse fiber) group which is also optimally arranged in the warp direction, denoted as B 经 The optimal arrangement directions of the two fiber groups are parallel to each other, and the stacking combination of the two fiber groups, i.e. the minimum fiber stacking unit, is denoted as A. 经 B 经 After the two types of fibers are stacked, due to the parallel stacking, different fiber layers will be nested and overlapped with each other, resulting in low porosity of the material, denser material, and poor thermal insulation performance.

[0048] The technical solution adopted by the present invention is to cross-stack the fiber groups in a certain direction. The schematic diagram of the stacking method between the fiber groups in some embodiments of the present invention is as follows: Figure 2 As shown, the A fiber group is optimally arranged in the warp direction, denoted as A 经 , stack the B fiber group with the best weft arrangement on the A fiber group, denoted as B 纬 The optimal arrangement directions of the two fiber groups have a cross angle and are not parallel to each other. The stacking combination of the two fiber groups, i.e. the minimum fiber stacking unit, is denoted as A. 经 B 纬 In the technical solution of the present invention, since there is a certain cross angle between two adjacent stacked fiber groups, the fiber groups in different layers can support each other, reducing the situation where fibers in different layers are nested with each other, so that the obtained material has a larger porosity and better thermal insulation performance.

[0049] A first aspect of the present invention provides a thermal insulation material comprising cross-laminated fiber groups, wherein the fiber groups of each two adjacent layers cross each other when stacked, and the angle of intersection is the crossing angle, which is 35 to 90 degrees.

[0050] The schematic diagram of the intersection angle in some embodiments of the present invention is as follows Figure 3 As shown, fiber group B is stacked on fiber group A, and the angle between the projection of fiber group B on the plane where fiber group A is located and fiber group A is angle C, and angle C is the crossing angle.

[0051] In some specific embodiments of the present invention, the intersection angle is 40 to 90°. In some specific embodiments of the present invention, the intersection angle is 60 to 90°. In some specific examples of the present invention, the intersection angle is 80 to 90°.

[0052] When the crossing angle is 90°, two adjacent fiber groups are stacked orthogonally; when there is no crossing, two adjacent fiber groups are stacked in parallel. The closer the crossing angle is to 90°, that is, the closer it is to orthogonal stacking, the smaller the thermal conductivity of the material is, and the better the thermal insulation performance is.

[0053] In some specific embodiments of the present invention, the fibers in the fiber group include thin fibers and coarse fibers having a diameter thicker than that of the thin fibers.

[0054] In some specific embodiments of the present invention, the diameter ratio of the coarse fiber to the fine fiber is greater than or equal to 2. In some specific embodiments of the present invention, the diameter ratio of the coarse fiber to the fine fiber is 2 to 50. In some specific examples of the present invention, the diameter ratio of the coarse fiber to the fine fiber is 2.5 to 30. In some more specific examples of the present invention, the diameter ratio of the coarse fiber to the fine fiber is 3 to 10.

[0055] In some specific embodiments of the present invention, the diameter of the fine fiber is 1-25 μm. In some specific embodiments of the present invention, the diameter of the fine fiber is 4-20 μm. In some specific examples of the present invention, the diameter of the fine fiber is 6-18 μm.

[0056] In some specific embodiments of the present invention, the diameter of the coarse fiber is greater than or equal to 10 μm. In some specific embodiments of the present invention, the diameter of the coarse fiber is 10 to 100 μm. In some specific examples of the present invention, the diameter of the coarse fiber is 15 to 80 μm. In some more specific examples of the present invention, the diameter of the coarse fiber is 20 to 50 μm.

[0057] In some specific embodiments of the present invention, the weight of the fine fiber is 8 to 50 g / m 2 In some specific embodiments of the present invention, the weight of the fine fiber is 10 to 40 g / m 2 In some specific examples of the present invention, the weight of the fine fiber is 11 to 30 g / m 2 .

[0058] In some specific embodiments of the present invention, the gram weight of the crude fiber is 8 to 50 g / m 2 In some specific embodiments of the present invention, the weight of the crude fiber is 10 to 40 g / m 2 In some specific examples of the present invention, the weight of the crude fiber is 11 to 30 g / m 2 .

[0059] In some specific embodiments of the present invention, the fibers of each layer of fiber group are composed of the same kind of fibers.

[0060] In some specific embodiments of the present invention, in the thermal insulation material, the cross-stacking is cross-stacking of a coarse fiber group and a fine fiber group, the coarse fiber group is composed of coarse fibers, and the fine fiber group is composed of fine fibers.

[0061] In some specific embodiments of the present invention, the shape of the fiber in the fiber group includes at least one of a circle, a triangle, a clover shape, an ellipse, a T-type or a Y-type. In some specific embodiments of the present invention, the shape of the fiber in the fiber group includes at least one of a circle, a triangle or a clover shape. In some specific examples of the present invention, the shape of the fiber in the fiber group is selected from a clover shape. It is understood that the shape of the fiber refers to the cross-sectional shape of the fiber.

[0062] In some embodiments of the present invention, the fibers in the group of fibers are selected from organic fibers.

[0063] In some specific embodiments of the present invention, the organic fiber comprises at least one of polyester, polypropylene, polyethylene, polystyrene, butadiene or styrene fibers. In some specific embodiments of the present invention, the organic fiber comprises at least one of polyester, polypropylene or polyethylene fibers. In some specific examples of the present invention, the organic fiber is selected from polyester fibers.

[0064] In some specific embodiments of the present invention, the surface texture of the fiber group includes at least one of plain, dotted or patterned. In some specific embodiments of the present invention, the surface texture of the fiber group includes plain, dotted or a combination thereof. In some specific examples of the present invention, the surface texture of the fiber group is selected from plain.

[0065] In some specific embodiments of the present invention, the number of cross-stacked layers in the thermal insulation material is 50 to 1000. In some specific embodiments of the present invention, the number of cross-stacked layers in the thermal insulation material is 120 to 600. In some specific examples of the present invention, the number of cross-stacked layers in the thermal insulation material is 150 to 300.

[0066] In some specific embodiments of the present invention, the thickness of the thermal insulation material is 3 to 30 mm. In some specific embodiments of the present invention, the thickness of the thermal insulation material is 6 to 25 mm. In some specific examples of the present invention, the thickness of the thermal insulation material is 8 to 20 mm.

[0067] The second aspect of the present invention provides a method for preparing the thermal insulation material of the present invention, comprising the following steps: cross-stacking the fiber groups to obtain the thermal insulation material of the present invention.

[0068] In some specific embodiments of the present invention, in the method for preparing the thermal insulation material, after the fiber groups are cross-laminated, a drying step is further included.

[0069] In some specific embodiments of the present invention, in the method for preparing the thermal insulation material, the drying temperature is 80 to 250° C. In some specific embodiments of the present invention, in the method for preparing the thermal insulation material, the drying temperature is 90 to 220° C. In some specific examples of the present invention, in the method for preparing the thermal insulation material, the drying temperature is 100 to 200° C.

[0070] A third aspect of the present invention provides a thermal insulation core material comprising the thermal insulation material of the present invention.

[0071] A fourth aspect of the present invention provides a thermal insulation board comprising the thermal insulation core material of the present invention. The thermal insulation board comprises the thermal insulation core material and a barrier film coated on the outside of the thermal insulation core material.

[0072] In some specific embodiments of the present invention, the barrier film in the thermal insulation board comprises at least one of a double-sided aluminized film, a yin-yang film, or a double-sided aluminum-free film. In some specific embodiments of the present invention, the barrier film in the thermal insulation board comprises a double-sided aluminized film, a yin-yang film, or a combination thereof. In some specific examples of the present invention, the barrier film in the thermal insulation board is selected from a yin-yang film.

[0073] A fifth aspect of the present invention provides a method for preparing the thermal insulation board of the present invention, comprising the following steps: placing the thermal insulation core material into a barrier film, and obtaining the thermal insulation board after vacuum packaging.

[0074] In some specific embodiments of the present invention, in the method for preparing the thermal insulation board, the vacuum degree of the vacuum package is 0.0003 to 10 Pa. In some specific embodiments of the present invention, in the method for preparing the thermal insulation board, the vacuum degree of the vacuum package is 0.0005 to 5 Pa. In some specific examples of the present invention, in the method for preparing the thermal insulation board, the vacuum degree of the vacuum package is 0.0008 to 0.1 Pa.

[0075] In some specific embodiments of the present invention, in the method for preparing the thermal insulation board, the vacuuming time of the vacuum packaging is 8 to 140 minutes. In some specific embodiments of the present invention, in the method for preparing the thermal insulation board, the vacuuming time of the vacuum packaging is 10 to 120 minutes. In some specific examples of the present invention, in the method for preparing the thermal insulation board, the vacuuming time of the vacuum packaging is 30 to 80 minutes.

[0076] A sixth aspect of the present invention provides a temperature regulating device, comprising at least one of the thermal insulation material, thermal insulation core material, or thermal insulation board material of the present invention.

[0077] In some specific embodiments of the present invention, the temperature regulating device includes at least one of a refrigeration device, a building insulation device, or a liquefied natural gas transportation device.

[0078] In some specific embodiments of the present invention, the refrigeration device includes at least one of a refrigerator, a freezer, a cold storage or an air conditioner.

[0079] In some embodiments of the present invention, a single organic fiber material is used as A 经 A 经 As the minimum fiber stacking unit, the thermal conductivity is 2.35mW / (m·K). After orthogonal stacking design, the minimum fiber stacking unit is A 经 A 纬 The thermal conductivity is reduced to 2.16mW / (m·K), which significantly improves the thermal insulation capacity. Two different diameters of coarse fibers (B fibers) and fine fibers (A fibers) are used for orthogonal stacking, that is, the minimum fiber stacking unit is A. 经 B 纬, the thermal conductivity can be reduced to 1.95mW / (m·K).

[0080] In another specific embodiment of the present invention, the fiber stacking method shown in Table 1 is performed. When a single organic fiber (A fiber or B fiber, A fiber is a thin fiber, B fiber is a coarse fiber) is used for stacking, orthogonal stacking can obtain a higher porosity and a lower thermal conductivity, while parallel stacking can obtain a lower porosity and a higher thermal conductivity, as shown in Table 1. 经 A 经 and B 经 B 经 The porosity is low and the thermal conductivity is high; A 经 A 纬 , B 经 B 纬 The porosity is higher and the thermal conductivity is lower. Figure 4 A 经 A 纬 SEM image of thermal insulation material made as the minimum fiber stacking unit, Figure 5 B 经 B 纬 SEM image of the thermal insulation material made as the minimum fiber stacking unit, from Figure 4 and Figure 5 It can be seen that when orthogonal lamination is performed, the material has a higher porosity.

[0081] When coarse fibers and fine fibers of different diameters are orthogonally stacked, the porosity is further increased and the thermal conductivity is further reduced, as shown in Table 1. 经 B 纬 , A 经 A 纬 B 经 B 纬 Compared to A 经 A 纬 , B 经 B 纬 , its porosity is further increased and thermal conductivity is further reduced.

[0082] Table 1 Porosity and thermal conductivity of different stacking methods and different fibers

[0083]

[0084]

[0085] In some specific embodiments of the present invention, the method of cross-lamination comprises the following steps:

[0086] The coiled material wound with the optimal fiber arrangement direction is placed on the stand, and the arrangement is controlled manually or by a cloth-pulling machine. A single layer of cloth (i.e., a single layer of fiber group with the optimal arrangement direction) is laid on the platform at a certain length and cut; the stand is rotated at a certain angle, and the arrangement is controlled manually or by a cloth-pulling machine, and the second layer is laid and cut; the stand is rotated at a certain angle, and the arrangement is controlled manually or by a cloth-pulling machine, and the third layer is laid and cut; and so on, when the required thickness is laid, an orthogonal stacked sample can be obtained. The angle of rotation of the above stand is the cross angle, that is, the angle between the optimal arrangement directions of two adjacent layers of fiber groups.

[0087] In some specific embodiments of the present invention, the method for orthogonal lamination comprises the following steps:

[0088] The coiled material wound with the optimal fiber arrangement direction is placed on the stand, and the arrangement is controlled manually or by a cloth-pulling machine. A single layer of cloth (i.e., a single layer of fiber group with the optimal arrangement direction) is spread on the platform at a certain length and cut; the stand is turned 90 degrees, and the arrangement is controlled manually or by a cloth-pulling machine, and the second layer is spread and cut; the stand is turned 90 degrees, and the arrangement is controlled manually or by a cloth-pulling machine, and the third layer is spread and cut; and so on, when the required thickness is laid, the orthogonal stacked sample can be obtained.

[0089] In some other specific embodiments of the present invention, the method for orthogonal lamination comprises the following steps:

[0090] The coil A wound with the optimal fiber arrangement direction is placed on the stand a, and the coil B wound with the optimal fiber arrangement direction is placed on the stand b. The coils A and B are arranged at 90 degrees. The arrangement is controlled manually or by a cloth-pulling machine. A single layer of cloth A is spread on the platform at a certain length and cut. The arrangement of B is controlled manually or by a cloth-pulling machine, the second layer is spread, and cut. The arrangement of A is controlled manually or by a cloth-pulling machine, the third layer is spread, and cut. This process is repeated by analogy. When the required thickness is reached, an orthogonal stacked sample can be obtained.

[0091] In some specific embodiments of the present invention, the method for parallel stacking comprises the following steps:

[0092] The coiled material wound with the optimal fiber arrangement direction is placed on the stand, and the arrangement is controlled manually or by a cloth-pulling machine. A single layer of cloth (i.e., a single layer of fiber group with the optimal arrangement direction) is spread on the platform at a certain length and cut; the stand does not rotate, and the arrangement is controlled manually or by a cloth-pulling machine, and the second layer is spread and cut; the stand does not rotate, and the arrangement is controlled manually or by a cloth-pulling machine, and the third layer is spread and cut; and so on, when the required thickness is laid, a parallel stacked sample can be obtained.

[0093] The content of the present invention is further described in detail below through specific examples. It should also be understood that the following examples are only used to further illustrate the present invention and cannot be construed as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the principles set forth in the present invention all belong to the scope of protection of the present invention. The specific process parameters and the like in the following examples are also only examples within a suitable range, that is, those skilled in the art can make a selection within a suitable range through the description herein, and are not limited to the specific data exemplified below. The raw materials, reagents or devices used in the following examples and comparative examples, unless otherwise specified, can all be obtained from conventional commercial sources, or can be obtained by existing known methods.

[0094] In a specific embodiment of the present invention, the fibers used can be purchased from Shanghai Jingfa Industrial Co., Ltd., Guangzhou Yihetai Nonwoven Fabric Co., Ltd., Guangzhou Yixian Nonwoven Fabric Co., Ltd. or Wenzhou Chaocheng Nonwoven Fabric Co., Ltd., and relevant samples can be obtained according to the design parameters.

[0095] In a specific embodiment of the present invention, the barrier film used can be purchased from Anhui Kensihui, Shanghai Toppan or Fujian Saite.

[0096] In a specific embodiment of the present invention, the fiber diameter is measured with reference to GB / T 10685-2007 "Test method for wool fiber diameter - Projection microscope method"; the fiber weight is measured with reference to GB / T 24218.1-2009 "Test methods for nonwoven fabrics of textiles - Part 1: Mass per unit area"; the thermal conductivity is measured with reference to GB / T 10295-2008 "Determination of steady-state thermal resistance and related properties of insulating materials - Heat flow meter method" and GB / T39704-2020 "Determination of effective thermal conductivity of vacuum insulation panels".

[0097] Thermal insulation material embodiment 1

[0098] This embodiment provides a thermal insulation material, including a fiber with a diameter of 13 microns and a gram weight of 18 g / m 2 Plain weave polyester cloverleaf fine fiber (A fiber), with a fiber diameter of 25 microns and a grammage of 20g / m 2 The plain weave polyester round coarse fiber (B fiber), the fine fiber and the coarse fiber are orthogonally stacked in sequence (the cross angle is 90°), and the number of stacked layers is 180. The minimum fiber stacking unit of this embodiment is denoted as A 经 B 纬 .

[0099] The specific preparation steps of the thermal insulation material of this embodiment are as follows:

[0100] The fiber diameter is 13 microns and the weight is 18g / m 2Plain weave polyester cloverleaf fine fiber (A fiber), with a fiber diameter of 25 microns and a grammage of 20g / m 2 The plain weave polyester round coarse fibers (B fibers) are orthogonally stacked in sequence, 180 layers are stacked, and the thermal insulation material is obtained after drying at 150°C.

[0101] Insulation board embodiment 1

[0102] This embodiment provides a thermal insulation board, comprising the thermal insulation material of embodiment 1 and a cation-cation membrane coated on the outside of the thermal insulation material.

[0103] The specific steps for preparing the thermal insulation board of this embodiment are as follows:

[0104] The thermal insulation material of Example 1 was placed in a cation film and vacuum packaged. The vacuuming time was 60 min and the vacuum degree was 0.001 Pa. After vacuum packaging, a thermal insulation board was obtained.

[0105] The thickness of the thermal insulation board prepared in this embodiment is 9.3 mm and the density is 220 kg / m 3 The thermal conductivity of the insulation board was tested using the double plate method (cold plate temperature 5°C, hot plate temperature 35°C, ambient temperature 23°C, humidity 50%), and the thermal conductivity was 1.95mW / (m·K).

[0106] Thermal insulation material embodiment 2

[0107] This embodiment provides a thermal insulation material, including a fiber with a diameter of 8 microns and a gram weight of 20 g / m 2 Plain weave polyester round fine fiber (A fiber), with a fiber diameter of 25 microns and a grammage of 20g / m 2 The plain weave polyester round coarse fiber (B fiber), the fine fiber and the coarse fiber are orthogonally stacked in sequence (the cross angle is 90°), and the number of stacked layers is 180. The minimum fiber stacking unit of this embodiment is denoted as A 经 B 纬 .

[0108] The specific preparation steps of the thermal insulation material of this embodiment are as follows:

[0109] The fiber diameter is 8 microns and the weight is 20g / m 2 Plain weave polyester round fine fiber (A fiber), with a fiber diameter of 25 microns and a grammage of 20g / m 2 The plain weave polyester round coarse fibers (B fibers) are sequentially orthogonally stacked, 180 layers are stacked, and the thermal insulation material is obtained after being dried at 130°C.

[0110] Insulation board embodiment 2

[0111] This embodiment provides a thermal insulation board, comprising the thermal insulation material of embodiment 2 and a cation-cation membrane coated on the outside of the thermal insulation material.

[0112] The specific steps for preparing the thermal insulation board of this embodiment are as follows:

[0113] The thermal insulation material of Example 2 was placed in a cation film and vacuum packaged. The vacuuming time was 60 min and the vacuum degree was 0.0005 Pa. After vacuum packaging, a thermal insulation board was obtained.

[0114] The thickness of the thermal insulation board prepared in this embodiment is 10.5 mm and the density is 240 kg / m 3 The thermal conductivity of the insulation board was tested using the double plate method (cold plate temperature 5°C, hot plate temperature 35°C, ambient temperature 23°C, humidity 50%), and the thermal conductivity was 2.03mW / (m·K).

[0115] Thermal insulation material embodiment 3

[0116] This embodiment provides a thermal insulation material, including a fiber with a diameter of 11 microns and a gram weight of 15 g / m 2 Plain weave polyester round fine fiber (A fiber), with fiber diameter 35 microns, grammage 20g / m 2 The plain weave polyester round coarse fiber (B fiber), the fine fiber and the coarse fiber are orthogonally stacked in sequence (the cross angle is 90°), and the number of stacked layers is 180. The minimum fiber stacking unit of this embodiment is denoted as A 经 B 纬 .

[0117] The specific preparation steps of the thermal insulation material of this embodiment are as follows:

[0118] The fiber diameter is 11 microns and the weight is 15g / m 2 Plain weave polyester round fine fiber (A fiber), with fiber diameter 35 microns, grammage 20g / m 2 The plain weave polyester round coarse fibers (B fibers) are sequentially orthogonally stacked, 180 layers are stacked, and the thermal insulation material is obtained after being dried at 130°C.

[0119] Insulation board embodiment 3

[0120] This embodiment provides a thermal insulation board, comprising the thermal insulation material of embodiment 3 and a cation-cation membrane coated on the outside of the thermal insulation material.

[0121] The specific steps for preparing the thermal insulation board of this embodiment are as follows:

[0122] The thermal insulation material of Example 3 was placed in a cation film and vacuum packaged. The vacuuming time was 60 min and the vacuum degree was 0.001 Pa. After vacuum packaging, a thermal insulation board was obtained.

[0123] The thickness of the thermal insulation board prepared in this embodiment is 8.5 mm and the density is 198 kg / m3 The thermal conductivity of the insulation board was tested using the double plate method (cold plate temperature 5°C, hot plate temperature 35°C, ambient temperature 23°C, humidity 50%), and the thermal conductivity was 1.98mW / (m·K).

[0124] Thermal insulation material embodiment 4

[0125] This embodiment provides a thermal insulation material, including a fiber with a diameter of 13 microns and a gram weight of 18 g / m 2 The plain weave polyester clover-shaped fine fibers (A fibers) are orthogonally stacked (the cross angle is 90°), and the number of stacked layers is 180. The minimum fiber stacking unit of this embodiment is denoted as A 经 A 纬 .

[0126] The specific preparation steps of the thermal insulation material of this embodiment are as follows:

[0127] The fiber diameter is 13 microns and the weight is 18g / m 2 The plain weave polyester clover-shaped fine fibers (A fibers) are stacked orthogonally in sequence, 180 layers are stacked, and the thermal insulation material is obtained after drying at 150°C.

[0128] Insulation board embodiment 4

[0129] This embodiment provides a thermal insulation board, comprising the thermal insulation material of embodiment 4 and a cation-cation membrane coated on the outside of the thermal insulation material.

[0130] The specific steps for preparing the thermal insulation board of this embodiment are as follows:

[0131] The thermal insulation material of Example 4 was placed in a cation film and vacuum packaged. The vacuuming time was 60 min and the vacuum degree was 0.001 Pa. After vacuum packaging, a thermal insulation board was obtained.

[0132] The thickness of the thermal insulation board prepared in this embodiment is 9.01 mm and the density is 210 kg / m 3 The thermal conductivity of the insulation board was tested using the double plate method (cold plate temperature 5°C, hot plate temperature 35°C, ambient temperature 23°C, humidity 50%), and the thermal conductivity was 2.06mW / (m·K).

[0133] Insulation Material Comparative Example 1

[0134] This comparative example provides a thermal insulation material, including a fiber with a diameter of 13 microns and a gram weight of 18 g / m 2 The plain weave polyester clover-shaped fine fibers (A fibers) are stacked in parallel in sequence (the cross angle is 0°), and the number of stacked layers is 180. The minimum fiber stacking unit of this comparative example is recorded as A 经 .

[0135] The specific preparation steps of the thermal insulation material of this comparative example are as follows:

[0136] The fiber diameter is 13 microns and the weight is 18g / m 2 The plain weave polyester clover-shaped fine fibers (A fibers) are stacked in parallel in sequence, 180 layers are stacked, and after drying at 150°C, an insulating material is obtained. The minimum fiber stacking unit of this comparative example is recorded as A warp.

[0137] Insulation board comparative example 1

[0138] This comparative example provides a thermal insulation board, comprising the thermal insulation material of comparative example 1 and a cation-cation membrane coated on the outside of the thermal insulation material.

[0139] The specific preparation steps of the thermal insulation board of this comparative example are as follows:

[0140] The thermal insulation material of comparative example 1 was placed in a cation film and vacuum packaged. The vacuuming time was 60 min and the vacuum degree was 0.001 Pa. After vacuum packaging, a thermal insulation board was obtained.

[0141] The thickness of the thermal insulation board prepared in this comparative example is 8.2 mm and the density is 230 kg / m 3 The thermal conductivity of the insulation board was tested using the double plate method (cold plate temperature 5°C, hot plate temperature 35°C, ambient temperature 23°C, humidity 50%), and the thermal conductivity was 2.16mW / (m·K).

[0142] The fiber parameters, process conditions and board properties of thermal insulation board embodiments 1 to 4 and thermal insulation board comparative example 1 are recorded in Table 2.

[0143] Table 2 Fiber parameters, process conditions and board properties of insulation board examples 1 to 4 and insulation board comparative example 1

[0144]

[0145]

[0146] Thermal insulation material embodiment 5

[0147] This embodiment provides a thermal insulation material, including a fiber with a diameter of 11 microns and a gram weight of 12 g / m 2 The rolled polyester round fibers are stacked orthogonally in sequence (the cross angle is 90°), and the number of stacked layers is 180.

[0148] The specific preparation steps of the thermal insulation material of this embodiment are as follows:

[0149] The fiber diameter is 11 microns and the weight is 12g / m 2The rolled polyester round fibers are orthogonally stacked, 180 layers are stacked, and the insulating material is obtained after drying at 180°C.

[0150] Insulation board embodiment 5

[0151] This embodiment provides a thermal insulation board, comprising the thermal insulation material of embodiment 5 and a cation-cation membrane coated on the outside of the thermal insulation material.

[0152] The specific steps for preparing the thermal insulation board of this embodiment are as follows:

[0153] The thermal insulation material of Example 5 was placed in a cation film and vacuum packaged. The vacuuming time was 60 min and the vacuum degree was 0.001 Pa. After vacuum packaging, a thermal insulation board was obtained.

[0154] The thermal conductivity of the insulation board was tested using the double plate method (cold plate temperature 5°C, hot plate temperature 35°C, ambient temperature 23°C, humidity 50%). The results are recorded in Table 3.

[0155] Thermal insulation material embodiment 6

[0156] This embodiment provides a thermal insulation material. The thermal insulation material of this embodiment is different from that of embodiment 5 in that the fiber weight of this embodiment is 15 g / m 2 .

[0157] Insulation board embodiment 6

[0158] This embodiment provides an insulating board material, comprising the insulating material of embodiment 6 and a cation-cation membrane coated on the outside of the insulating material.

[0159] The specific steps for preparing the thermal insulation board of this embodiment are as follows:

[0160] The thermal insulation material of Example 6 was placed in a cation film and vacuum packaged. The vacuuming time was 60 min and the vacuum degree was 0.001 Pa. After vacuum packaging, a thermal insulation board was obtained.

[0161] The thermal conductivity of the insulation board was tested using the double plate method (cold plate temperature 5°C, hot plate temperature 35°C, ambient temperature 23°C, humidity 50%). The results are recorded in Table 3.

[0162] Thermal insulation material embodiment 7

[0163] This embodiment provides a thermal insulation material. The thermal insulation material of this embodiment is different from that of embodiment 5 in that the fiber weight of this embodiment is 17 g / m 2 .

[0164] Insulation board embodiment 7

[0165] This embodiment provides an insulating board material, comprising the insulating material of embodiment 7 and a cation-cation membrane coated on the outside of the insulating material.

[0166] The specific steps for preparing the thermal insulation board of this embodiment are as follows:

[0167] The thermal insulation material of Example 7 was placed in a cation film and vacuum packaged. The vacuuming time was 60 min and the vacuum degree was 0.001 Pa. After vacuum packaging, a thermal insulation board was obtained.

[0168] The thermal conductivity of the insulation board was tested using the double plate method (cold plate temperature 5°C, hot plate temperature 35°C, ambient temperature 23°C, humidity 50%). The results are recorded in Table 3.

[0169] Thermal insulation material embodiment 8

[0170] This embodiment provides a thermal insulation material. The thermal insulation material of this embodiment is different from that of embodiment 5 in that the fiber weight of this embodiment is 23 g / m 2 .

[0171] Insulation board embodiment 8

[0172] This embodiment provides an insulating board material, comprising the insulating material of embodiment 8 and a cation-cation membrane coated on the outside of the insulating material.

[0173] The specific steps for preparing the thermal insulation board of this embodiment are as follows:

[0174] The thermal insulation material of Example 8 was placed in a cation-cation membrane and vacuum-packaged. The vacuuming time was 60 min and the vacuum degree was 0.001 Pa. After vacuum packaging, a thermal insulation board was obtained.

[0175] The thermal conductivity of the insulation board was tested using the double plate method (cold plate temperature 5°C, hot plate temperature 35°C, ambient temperature 23°C, humidity 50%). The results are recorded in Table 3.

[0176] Insulation material comparative example 2

[0177] This comparative example provides a thermal insulation material. The difference between the thermal insulation material of this comparative example and that of Example 5 is that the fibers of this comparative example are stacked in parallel (the crossing angle is 0°).

[0178] Insulation board comparative example 2

[0179] This comparative example provides a thermal insulation board, comprising the thermal insulation material of comparative example 2 and a cation-cation membrane coated on the outside of the thermal insulation material.

[0180] The specific preparation steps of the thermal insulation board of this comparative example are as follows:

[0181] The thermal insulation material of comparative example 2 was placed in a cation film and vacuum packaged. The vacuuming time was 60 min and the vacuum degree was 0.001 Pa. After vacuum packaging, a thermal insulation board was obtained.

[0182] The thermal conductivity of the insulation board was tested using the double plate method (cold plate temperature 5°C, hot plate temperature 35°C, ambient temperature 23°C, humidity 50%). The results are recorded in Table 3.

[0183] Insulation material comparative example 3

[0184] This comparative example provides a thermal insulation material. The difference between the thermal insulation material of this comparative example and that of Example 6 is that the fibers of this comparative example are stacked in parallel (the crossing angle is 0°).

[0185] Insulation board comparative example 3

[0186] This comparative example provides a thermal insulation board, comprising the thermal insulation material of comparative example 3 and a cation-cation membrane coated on the outside of the thermal insulation material.

[0187] The specific preparation steps of the thermal insulation board of this comparative example are as follows:

[0188] The thermal insulation material of comparative example 3 was placed in a cation-cation membrane and vacuum packaged. The vacuuming time was 60 min and the vacuum degree was 0.001 Pa. After vacuum packaging, a thermal insulation board was obtained.

[0189] The thermal conductivity of the insulation board was tested using the double plate method (cold plate temperature 5°C, hot plate temperature 35°C, ambient temperature 23°C, humidity 50%). The results are recorded in Table 3.

[0190] Insulation Material Comparative Example 4

[0191] This comparative example provides a thermal insulation material. The difference between the thermal insulation material of this comparative example and that of Example 7 is that the fibers of this comparative example are stacked in parallel (the crossing angle is 0°).

[0192] Insulation board comparative example 4

[0193] This comparative example provides a thermal insulation board, comprising the thermal insulation material of comparative example 4 and a cation-cation membrane coated on the outside of the thermal insulation material.

[0194] The specific preparation steps of the thermal insulation board of this comparative example are as follows:

[0195] The thermal insulation material of comparative example 4 was placed in a cation-cation membrane and vacuum packaged. The vacuuming time was 60 min and the vacuum degree was 0.001 Pa. After vacuum packaging, a thermal insulation board was obtained.

[0196] The thermal conductivity of the insulation board was tested using the double plate method (cold plate temperature 5°C, hot plate temperature 35°C, ambient temperature 23°C, humidity 50%). The results are recorded in Table 3.

[0197] Thermal insulation material comparative example 5

[0198] This comparative example provides a thermal insulation material. The difference between the thermal insulation material of this comparative example and that of Example 8 is that the fibers of this comparative example are stacked in parallel (the crossing angle is 0°).

[0199] Insulation board comparative example 5

[0200] This comparative example provides a thermal insulation board, comprising the thermal insulation material of comparative example 5 and a cation-cation membrane coated on the outside of the thermal insulation material.

[0201] The specific preparation steps of the thermal insulation board of this comparative example are as follows:

[0202] The thermal insulation material of comparative example 5 was placed in a cation-cation membrane and vacuum packaged. The vacuuming time was 60 min and the vacuum degree was 0.001 Pa. After vacuum packaging, a thermal insulation board was obtained.

[0203] The thermal conductivity of the insulation board was tested using the double plate method (cold plate temperature 5°C, hot plate temperature 35°C, ambient temperature 23°C, humidity 50%). The results are recorded in Table 3.

[0204] Table 3 Fiber parameters, process conditions and board properties of insulation board examples 5 to 8 and insulation board comparative examples 2 to 5

[0205]

[0206] Thermal insulation material embodiment 9

[0207] This embodiment provides a thermal insulation material, including a fiber with a diameter of 27 microns and a gram weight of 20 g / m 2 The rolled polyester round fibers are stacked in sequence with a crossing angle of 60° and 180 layers.

[0208] The specific preparation steps of the thermal insulation material of this embodiment are as follows:

[0209] The fiber diameter is 27 microns and the weight is 20g / m 2 The polyester round fibers with rolling points are stacked at a crossing angle of 60°, 180 layers are stacked, and the insulating material is obtained after drying at 120°C.

[0210] Thermal insulation board embodiment 9

[0211] This embodiment provides an insulating board material, comprising the insulating material of embodiment 9 and a cation-cation membrane coated on the outside of the insulating material.

[0212] The specific steps for preparing the thermal insulation board of this embodiment are as follows:

[0213] The thermal insulation material of Example 9 was placed in a cation film and vacuum packaged. The vacuuming time was 60 min and the vacuum degree was 0.001 Pa. After vacuum packaging, a thermal insulation board was obtained.

[0214] The thermal conductivity of the insulation board was tested using the double plate method (cold plate temperature 5°C, hot plate temperature 35°C, ambient temperature 23°C, humidity 50%). The results are recorded in Table 4.

[0215] Thermal insulation material embodiment 10

[0216] This embodiment provides a thermal insulation material. The difference between the thermal insulation material of this embodiment and that of Embodiment 9 is that the fibers of this embodiment are stacked at a crossing angle of 90°, that is, orthogonal stacking is performed.

[0217] Thermal insulation board embodiment 10

[0218] This embodiment provides an insulating board material, comprising the insulating material of embodiment 10 and a cation-cation membrane coated on the outside of the insulating material.

[0219] The specific steps for preparing the thermal insulation board of this embodiment are as follows:

[0220] The thermal insulation material of Example 10 was placed in a cation-cation membrane and vacuum-packaged. The vacuuming time was 60 min and the vacuum degree was 0.001 Pa. After vacuum packaging, a thermal insulation board was obtained.

[0221] The thermal conductivity of the insulation board was tested using the double plate method (cold plate temperature 5°C, hot plate temperature 35°C, ambient temperature 23°C, humidity 50%). The results are recorded in Table 4.

[0222] Thermal insulation material comparative example 6

[0223] This comparative example provides a thermal insulation material. The difference between the thermal insulation material of this comparative example and that of Example 9 is that the fibers of this comparative example are stacked at a cross angle of 0°, that is, they are stacked in parallel.

[0224] Insulation board comparative example 6

[0225] This comparative example provides a thermal insulation board, comprising the thermal insulation material of comparative example 6 and a cation-cation membrane coated on the outside of the thermal insulation material.

[0226] The specific preparation steps of the thermal insulation board of this comparative example are as follows:

[0227] The thermal insulation material of Comparative Example 6 was placed in a cation film and vacuum packaged. The vacuuming time was 60 min and the vacuum degree was 0.001 Pa. After vacuum packaging, a thermal insulation board was obtained.

[0228] The thermal conductivity of the insulation board was tested using the double plate method (cold plate temperature 5°C, hot plate temperature 35°C, ambient temperature 23°C, humidity 50%). The results are recorded in Table 4.

[0229] Thermal insulation material comparative example 7

[0230] This comparative example provides a thermal insulation material. The difference between the thermal insulation material of this comparative example and that of Example 9 is that the fibers of this comparative example are stacked at a crossing angle of 30°.

[0231] Insulation board comparative example 7

[0232] This comparative example provides a thermal insulation board, comprising the thermal insulation material of comparative example 7 and a cation-cation membrane coated on the outside of the thermal insulation material.

[0233] The specific preparation steps of the thermal insulation board of this comparative example are as follows:

[0234] The thermal insulation material of comparative example 7 was placed in a cation film and vacuum packaged. The vacuuming time was 60 min and the vacuum degree was 0.001 Pa. After vacuum packaging, a thermal insulation board was obtained.

[0235] The thermal conductivity of the insulation board was tested using the double plate method (cold plate temperature 5°C, hot plate temperature 35°C, ambient temperature 23°C, humidity 50%). The results are recorded in Table 4.

[0236] Table 4 Cross angle and sheet performance of thermal insulation board examples 9-10 and thermal insulation board comparative examples 6-7

[0237] Example 9 Example 10 Comparative Example 6 Comparative Example 7 Crossing angle (°) 60 90 0 30 Thermal conductivity of insulation board (mW / (m·K)) 2.11 2.01 2.32 2.29

[0238] Thermal insulation material embodiment 11

[0239] This embodiment provides a thermal insulation material, including a fiber with a diameter of 27 microns and a gram weight of 30 g / m 2 A fiber, with a fiber diameter of 5 microns and a gram weight of 20g / m 2 The plain weave polyester round fiber (B fiber), fine fiber and coarse fiber are orthogonally stacked in sequence (the crossing angle is 90°), and the number of stacked layers is 180.

[0240] The specific preparation steps of the thermal insulation material of this embodiment are as follows:

[0241] The fiber diameter is 27 microns and the weight is 30g / m 2 A fiber, with a fiber diameter of 5 microns and a gram weight of 20g / m 2 The plain woven polyester round fibers (B fibers) are orthogonally stacked, 180 layers are stacked, and the thermal insulation material is obtained after drying at 180°C.

[0242] Insulation board embodiment 11

[0243] This embodiment provides an insulating board material, comprising the insulating material of embodiment 11 and a cation-cation membrane coated on the outside of the insulating material.

[0244] The specific steps for preparing the thermal insulation board of this embodiment are as follows:

[0245] The thermal insulation material of Example 11 was placed in a cation-cation membrane and vacuum-packaged. The vacuuming time was 40 min and the vacuum degree was 0.001 Pa. After vacuum packaging, a thermal insulation board was obtained.

[0246] The thermal conductivity of the insulation board was tested using the double plate method (cold plate temperature 5°C, hot plate temperature 35°C, ambient temperature 23°C, humidity 50%). The results are recorded in Table 5.

[0247] Thermal insulation material embodiment 12

[0248] This embodiment provides a thermal insulation material. The difference between the thermal insulation material of this embodiment and that of Embodiment 11 is that the fiber diameter of the B fiber of this embodiment is 13 microns.

[0249] Insulation board embodiment 12

[0250] This embodiment provides an insulating board material, comprising the insulating material of embodiment 12 and a cation-cation membrane coated on the outside of the insulating material.

[0251] The specific steps for preparing the thermal insulation board of this embodiment are as follows:

[0252] The thermal insulation material of Example 12 was placed in a cation-cation membrane and vacuum-packaged. The vacuuming time was 40 min and the vacuum degree was 0.001 Pa. After vacuum packaging, a thermal insulation board was obtained.

[0253] The thermal conductivity of the insulation board was tested using the double plate method (cold plate temperature 5°C, hot plate temperature 35°C, ambient temperature 23°C, humidity 50%). The results are recorded in Table 5.

[0254] Thermal insulation material comparative example 8

[0255] This comparative example provides a thermal insulation material. The difference between the thermal insulation material of this comparative example and that of Example 11 is that the fiber diameter of the B fiber of this comparative example is 27 microns.

[0256] Insulation board comparative example 8

[0257] This comparative example provides a thermal insulation board, comprising the thermal insulation material of comparative example 8 and a cation-cation membrane coated on the outside of the thermal insulation material.

[0258] The specific preparation steps of the thermal insulation board of this comparative example are as follows:

[0259] The thermal insulation material of Comparative Example 8 was placed in a cation-cation membrane and vacuum packaged. The vacuuming time was 40 min and the vacuum degree was 0.001 Pa. After vacuum packaging, a thermal insulation board was obtained.

[0260] The thermal conductivity of the insulation board was tested using the double plate method (cold plate temperature 5°C, hot plate temperature 35°C, ambient temperature 23°C, humidity 50%). The results are recorded in Table 5.

[0261] Table 5 Fiber parameters and board properties of thermal insulation board examples 11 to 12 and thermal insulation board comparative example 8

[0262]

[0263]

[0264] The embodiment of the present invention uses a specific cross-stacked method to prevent the fiber layers from being nested with each other, thereby increasing the porosity and reducing the thermal conductivity, thereby obtaining an insulating material with excellent thermal insulation effect. The fiber layers of the embodiment of the present invention will not be nested with each other, and when the insulating board is prepared by vacuum compression, the structure will not collapse, thereby effectively solving the problem of poor thermal insulation performance of existing organic fiber insulating boards.

[0265] The embodiment of the present invention stacks coarse fibers and fine fibers of different diameters. The coarse fibers have a larger diameter and greater rigidity, and can maintain a smaller deformation when subjected to external force, thereby avoiding collapse of the material structure and maintaining a larger porosity. The fine fibers can effectively reduce the solid-phase thermal conductivity of the material. Through the mutual cooperation of the coarse fibers and the fine fibers, the prepared insulation material has higher rigidity, can maintain a higher porosity, and has a lower thermal conductivity, further improving the thermal insulation effect of the insulation material.

[0266] The thermal insulation material, thermal insulation core material, and thermal insulation board provided by the embodiment of the present invention have high porosity, low thermal conductivity, and excellent thermal insulation effect. The thermal insulation board of the embodiment of the present invention is applied to a temperature regulating device to obtain a temperature regulating device with good temperature regulating effect.

[0267] In the embodiment of the present invention, the heat insulating board material of the embodiment of the present invention is applied to a refrigeration device, so as to obtain a refrigeration device with good heat insulation performance and good thermal insulation effect.

[0268] In an embodiment of the present invention, the refrigeration device includes at least one of a refrigerator, a freezer, a cold storage or an air conditioner.

[0269] In the embodiment of the present invention, the heat insulating board material of the embodiment of the present invention is applied to a building heat preservation device, so that a building heat preservation device with good heat insulation performance and good heat preservation effect can be obtained.

[0270] In the embodiment of the present invention, the heat insulating plate material of the embodiment of the present invention is applied to a liquefied natural gas transportation device, so that a liquefied natural gas transportation device with good heat insulation performance and good thermal insulation effect can be obtained.

Claims

1. A thermal insulation material, characterized in that: It comprises cross-laminated fiber groups, wherein each two adjacent layers of the fiber groups cross each other when stacked, and the angle of the cross is the cross angle, which is 35-90 degrees.

2. The thermal insulation material according to claim 1, characterized in that: The fibers in the fiber group include thin fibers and thick fibers having a diameter thicker than that of the thin fibers.

3. The thermal insulation material according to claim 2, characterized in that: The diameter ratio of the coarse fiber to the fine fiber is greater than or equal to 2.

4. The thermal insulation material according to claim 3, characterized in that: The diameter of the fine fibers is 1 to 25 μm.

5. The thermal insulation material according to claim 3, characterized in that: The diameter of the coarse fiber is greater than or equal to 10 μm.

6. The thermal insulation material according to claim 2, characterized in that: The weight of the coarse fiber and the fine fiber is independently 8 to 50 g / m 2 .

7. The thermal insulation material according to any one of claims 2 to 6, characterized in that: The cross-stacking is cross-stacking of a coarse fiber group and a fine fiber group, wherein the coarse fiber group is composed of the coarse fibers, and the fine fiber group is composed of the fine fibers.

8. The thermal insulation material according to claim 1, characterized in that: The shape of the fibers in the fiber group includes at least one of a circular shape, a triangular shape, a clover shape, an elliptical shape, a T shape, or a Y shape.

9. The thermal insulation material according to claim 1, characterized in that: The fibers in the fiber group are selected from organic fibers.

10. The thermal insulation material according to claim 1, characterized in that The number of the cross-stacked layers is 50 to 1000.

11. The method for preparing the thermal insulation material according to any one of claims 1 to 10, characterized in that: The method comprises the following steps: cross-stacking the fiber groups to obtain the thermal insulation material.

12. A thermal insulation core material, characterized in that: The thermal insulation material comprises the thermal insulation material according to any one of claims 1 to 10.

13. A thermal insulation board, characterized in that: It comprises the thermal insulation core material according to claim 12 and a barrier film coated on the outside of the thermal insulation core material.

14. The thermal insulation board according to claim 13, characterized in that: The barrier film includes at least one of a double-sided aluminum-plated film, a cation-cation film, or a double-sided aluminum-free film.

15. The method for preparing the thermal insulation board according to claim 13 or 14, characterized in that: The following steps are involved: The thermal insulation core material is placed in the barrier film and vacuum packaged to obtain the thermal insulation board material.

16. The method for preparing the thermal insulation board according to claim 15, characterized in that: The vacuum degree of the vacuum packaging is 0.0003-10 Pa, and the vacuuming time of the vacuum packaging is 8-140 minutes.

17. A temperature regulating device, characterized in that: It comprises at least one of the thermal insulation material according to any one of claims 1 to 10, the thermal insulation core material according to claim 10, and the thermal insulation board material according to claim 13 or 14.

18. The temperature adjustment device according to claim 17, characterized in that: The temperature regulating device includes at least one of a refrigeration device, a building insulation device or a liquefied natural gas transportation device.

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