Heat-insulating material, heat-insulating core material, heat-insulating sheet material, and temperature adjusting device

Abstract

The invention provides a heat-insulating material, a heat-insulating core material, a heat-insulating plate material and a temperature adjusting device. The invention belongs to the technical field of functional materials, and discloses a heat insulation material which is formed by stacking fine fibers and crude fibers. The diameter of the fine fibers is 1-25 microns; the diameter of the crude fibers is larger than or equal to 10 micrometers. Crude fibers and fine fibers with different diameters are stacked, the diameter of the crude fibers is large, the rigidity is large, small deformation can be kept when the crude fibers are subjected to external force, collapse of the material structure is avoided, and therefore large porosity is kept; the coarse fibers can effectively reduce the solid-phase heat conduction performance of the material, the fine fibers can effectively reduce the solid-phase heat conduction performance of the material, through mutual cooperation of the coarse fibers and the fine fibers, the prepared heat insulation material has high rigidity, can keep high porosity and meanwhile has a low heat conduction coefficient, and the heat preservation effect of the heat insulation material is further improved. The invention further provides a heat insulation core material, a heat insulation plate and a temperature adjusting device which comprise the heat 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, a thermal insulation core material, a thermal insulation board material and a temperature regulating device. Background Art

[0002] How to provide an insulating material with good insulation performance has been a difficult problem in the industry recently. Among them, Vacuum Insulation Panel (VIP) is a new type of insulation material that has developed rapidly in recent years. VIP is a high-performance insulation material that is widely used in construction, cold chain transportation, electronic equipment and other fields that require effective insulation. It has excellent insulation performance and has higher insulation efficiency than traditional insulation materials such as polystyrene, polyurethane or mineral wool. The main composition of VIP is a layer of high adsorption material (such as inorganic material or composite material) wrapped around a hydrophobic material with a microporous structure. The internal air is extracted to form a vacuum, thereby effectively preventing gas convection and heat conduction. This design effectively reduces the path of heat transfer, making it have a lower thermal conductivity than ordinary insulation materials. The advantages of VIP include: (1) Ultra-high thermal insulation performance: VIP's unique structure almost eliminates heat conduction and convection, providing excellent thermal insulation performance, effectively saving energy and maintaining temperature stability; (2) Thin design: Compared with traditional insulation materials, VIP's thin design makes it more efficient in space utilization, especially suitable for applications in limited space; (3) Long-term stability: VIP's vacuum-sealed structure can maintain thermal insulation performance for a long time, usually with a lifespan of more than 15 years, ensuring a long-lasting thermal insulation effect; (4) Environmental protection and energy saving: Due to its excellent thermal insulation performance, the application of VIP in construction, cold chain transportation and other fields helps to reduce energy consumption and greenhouse gas emissions. In short, VIP uses the high vacuum inside to reduce air heat convection, the low thermal conductivity core material reduces solid heat conduction, and the high reflective barrier film increases the inhibitory effect on radiation convection. At the same time, it plays the role of water and air isolation to maintain the vacuum degree, so that the internal heat transfer is minimized.

[0003] At present, vacuum insulation panels using organic fibers as core materials are made by stacking a large number of non-woven fabrics. Due to the low strength of the fibers, the structure is prone to collapse after vacuum compression, resulting in poor insulation performance.

[0004] Therefore, it is necessary to develop an insulating material with higher thermal insulation capacity. Summary of the invention

[0005] The present invention aims to solve one of the above 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 can obtain a higher heat preservation capacity and better thermal insulation performance by stacking thick and thin fibers of different diameters.

[0006] A second object of the present invention is to provide a method for preparing the above-mentioned thermal insulation material.

[0007] A third object of the present invention is to provide a thermal insulation core material comprising the above-mentioned thermal insulation material.

[0008] A fourth object of the present invention is to provide an insulating board material comprising the above-mentioned insulating core material.

[0009] A fifth object of the present invention is to provide a method for preparing the above-mentioned thermal insulation board.

[0010] A sixth object of the present invention is to provide a temperature regulating device.

[0011] In order to achieve the above object, the technical solution adopted by the present invention is:

[0012] The first aspect of the present invention provides a thermal insulation material, which is composed of stacked fine fibers and coarse fibers; the diameter of the fine fibers is 1 to 25 μm; and the diameter of the coarse fibers is ≥10 μm.

[0013] The thermal insulation material according to the first aspect of the present invention has at least the following beneficial effects:

[0014] The present invention stacks coarse fibers and fine fibers of different diameters. The coarse fibers have a larger diameter and greater rigidity. When subjected to external forces, they can maintain a smaller deformation, thus 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 also has a lower thermal conductivity, further improving its thermal insulation effect.

[0015] In some embodiments of the thermal insulation material of the present invention, the diameter of the coarse fiber is greater than the diameter of the fine fiber.

[0016] In some embodiments of the thermal insulation material of the present invention, the ratio of the diameter of the coarse fiber to the diameter of the fine fiber is ≥1.8.

[0017] In some specific embodiments of the thermal insulation material of the present invention, the ratio of the diameter of the coarse fiber to the diameter of the fine fiber is 1.8-50.

[0018] In some embodiments of the thermal insulation material of the present invention, the diameter of the coarse fiber is 10 to 100 μm.

[0019] In some embodiments of the thermal insulation material of the present invention, the diameter of the fine fibers is 4 to 20 μm.

[0020] In some embodiments of the thermal insulation material of the present invention, the gram weight of the coarse fiber and the fine fiber is the same or different and is in the range of 8 to 50 g / m 2 between.

[0021] In some specific embodiments of the thermal insulation material of the present invention, the gram weight of the crude fiber is 10 to 40 g / m 2 .

[0022] In some specific embodiments of the thermal insulation material of the present invention, the gram weight of the fine fibers is 10 to 40 g / m 2 .

[0023] In some embodiments of the thermal insulation material of the present invention, the cross-sectional shapes of the coarse fibers and the fine fibers are respectively selected from one or more of circular, triangular, clover-shaped, elliptical, T-shaped, and Y-shaped.

[0024] In some embodiments of the thermal insulation material of the present invention, the coarse fibers and the fine fibers are independently selected from organic fibers.

[0025] In some embodiments of the thermal insulation material of the present invention, the organic fiber includes one or more of polyester fiber, polypropylene fiber, polyethylene fiber, polystyrene fiber, butadiene fiber, and styrene fiber.

[0026] In some embodiments of the thermal insulation material of the present invention, the number of stacked layers is 50 to 1000.

[0027] In some embodiments of the thermal insulation material of the present invention, the number of stacked layers is 100 to 1000.

[0028] In some specific embodiments of the thermal insulation material of the present invention, the number of stacked layers is 120 to 600.

[0029] In some specific embodiments of the thermal insulation material of the present invention, the number of stacked layers is within a range formed by any two values ​​of 50 layers, 100 layers, 120 layers, 600 layers and 1000 layers.

[0030] In some embodiments of the thermal insulation material of the present invention, the coarse fibers and the fine fibers are cross-stacked, so that the fiber groups will not be nested with each other, thereby increasing the porosity and reducing the thermal conductivity, thereby obtaining a thermal insulation material with excellent thermal insulation effect.

[0031] 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: stacking the fine fibers and the coarse fibers to obtain the thermal insulation material.

[0032] The method for preparing the thermal insulation material according to the second aspect of the present invention has at least the following beneficial effects:

[0033] The preparation method of the thermal insulation material of the present invention is simple and easy to operate.

[0034] The third aspect of the present invention provides a thermal insulation core material, comprising the thermal insulation material described in the first aspect of the present invention.

[0035] The thermal insulation core material according to the third aspect of the present invention has at least the following beneficial effects:

[0036] The heat-insulating core material of the present invention has higher porosity, lower thermal conductivity and excellent heat-insulating effect.

[0037] A fourth aspect of the present invention provides a thermal insulation board, comprising:

[0038] The thermal insulation core material according to the third aspect of the present invention and;

[0039] A barrier film covers the thermal insulation core material.

[0040] The thermal insulation board according to the fourth aspect of the present invention has at least the following beneficial effects:

[0041] The heat insulating board material of the present invention has higher porosity, lower thermal conductivity and excellent heat preservation effect.

[0042] In some embodiments of the thermal insulation board of the present invention, the barrier film includes one or more of a double-sided aluminum-plated film, a cation-cation film, and a double-sided aluminum-free film.

[0043] 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.

[0044] The method for preparing the thermal insulation board according to the fifth aspect of the present invention has at least the following beneficial effects:

[0045] The preparation method of the thermal insulation board of the present invention is simple and easy to operate.

[0046] In some embodiments of the method for preparing the thermal insulation board of the present invention, the vacuum degree of the vacuum packaging is 0.0003-10Pa.

[0047] In some embodiments of the method for preparing the thermal insulation board of the present invention, the vacuum degree of the vacuum packaging is 0.0003-8Pa.

[0048] In some embodiments of the method for preparing the thermal insulation board of the present invention, the vacuum degree of the vacuum packaging is 0.0003-1.2Pa.

[0049] In some specific embodiments of the method for preparing the thermal insulation board of the present invention, the vacuum degree of the vacuum packaging is 0.0005-1Pa.

[0050] In some embodiments of the method for preparing the thermal insulation board material of the present invention, the vacuuming time of the vacuum packaging is 8 to 140 minutes.

[0051] In some specific embodiments of the method for preparing the thermal insulation board material of the present invention, the vacuuming time of the vacuum packaging is 10 to 120 minutes.

[0052] The sixth aspect of the present invention provides a temperature regulating device, which comprises one or more 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, and the insulation board material described in the fourth aspect of the present invention.

[0053] The temperature regulating device according to the sixth aspect of the present invention has at least the following beneficial effects:

[0054] The temperature regulating device provided by the present invention comprises a heat-insulating material, a heat-insulating core material or a heat-insulating plate material. These materials have a high porosity, a low thermal conductivity and an excellent heat-insulating effect, and thus have a good temperature regulating effect.

[0055] In some embodiments of the temperature regulating device of the present invention, the temperature regulating device includes a refrigeration device, a building insulation device or a liquefied natural gas transportation device.

[0056] In some embodiments of the temperature regulating device of the present invention, the refrigeration device includes one or more of a refrigerator, a freezer, a cold storage, and an air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 Schematic diagram of the thermal insulation material structure of an embodiment of the present invention.

[0058] Figure 2 It is a schematic diagram of the fiber stacking method in the prior art.

[0059] Figure 3 Schematic diagram of fiber stacking method according to an embodiment of the present invention.

[0060] Figure 4 A 经 A 纬 SEM image of the thermal insulation material produced as the smallest fiber stacking unit. DETAILED DESCRIPTION

[0061] Embodiments of the present invention are described in detail below. The embodiments are exemplary and are only used to explain the present invention, but are not to be construed as limiting the present invention.

[0062] The first aspect of the present invention provides a thermal insulation material. Figure 1 A thermal insulation material according to an embodiment of the present invention is described. Figure 1 In the diagram, A fiber represents fine fiber and B fiber represents coarse fiber.

[0063] like Figure 1 As shown, the thermal insulation material of the embodiment of the present invention is composed of fine fibers ( Figure 1 A fiber) and crude fiber ( Figure 1 The B fibers in the material are stacked; the diameter of the fine fibers is 1 to 25 μm; the diameter of the coarse fibers is ≥10 μm. Thus, coarse fibers and fine fibers of different diameters are stacked. The coarse fibers have a larger diameter and greater rigidity. When subjected to external forces, they can maintain a smaller deformation, avoid the collapse of the material structure, and thus maintain 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 thermal insulation material has a higher rigidity, can maintain a higher porosity, and also has a lower thermal conductivity, further improving its thermal insulation effect.

[0064] In some embodiments of the present invention, the diameter of the coarse fibers is greater than the diameter of the fine fibers.

[0065] In some embodiments of the present invention, the ratio of the diameter of the coarse fiber to the diameter of the fine fiber is ≥1.8; in some specific embodiments of the present invention, the ratio of the diameter of the coarse fiber to the diameter of the fine fiber is 1.8-50; in some examples of the present invention, the ratio of the diameter of the coarse fiber to the diameter of the fine fiber is 1.9-30; in some specific examples of the present invention, the ratio of the diameter of the coarse fiber to the diameter of the fine fiber is 1.9-10.

[0066] In some embodiments of the present invention, the diameter of the coarse fiber is 10 to 100 μm; in some specific embodiments of the present invention, the diameter of the coarse fiber is 15 to 80 μm; in some examples of the present invention, the diameter of the coarse fiber is 20 to 50 μm; in some specific examples of the present invention, the diameter of the coarse fiber is 22 to 30 μm.

[0067] In some embodiments of the present invention, the diameter of the fine fiber is 4-20 μm; in some specific embodiments of the present invention, the diameter of the fine fiber is 5-18 μm; in some examples of the present invention, the diameter of the fine fiber is 5-15 μm.

[0068] In some embodiments of the present invention, the 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 examples of the present invention, the weight of the crude fiber is 11 to 30 g / m 2 .

[0069] In some 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 examples of the present invention, the weight of the fine fiber is 11 to 30 g / m 2 .

[0070] In some embodiments of the present invention, the cross-sectional shape of the coarse fiber is selected from one or more of circular, triangular, clover-shaped, elliptical, T-shaped, and Y-shaped; in some specific embodiments of the present invention, the cross-sectional shape of the coarse fiber is selected from one or more of circular, triangular, and clover-shaped; in some examples of the present invention, the cross-sectional shape of the coarse fiber is selected from clover-shaped.

[0071] In some embodiments of the present invention, the cross-sectional shape of the fine fiber is selected from one or more of a circle, a triangle, a clover-shaped, an ellipse, a T-shaped, and a Y-shaped; in some specific embodiments of the present invention, the cross-sectional shape of the fine fiber is selected from one or more of a circle, a triangle, and a clover-shaped; in some examples of the present invention, the cross-sectional shape of the fine fiber is selected from a clover-shaped.

[0072] In some embodiments of the present invention, the coarse fibers are selected from organic fibers.

[0073] In some embodiments of the present invention, the fine fibers are selected from organic fibers.

[0074] In some embodiments of the present invention, the organic fiber includes one or more of polyester fiber, polypropylene fiber, polyethylene fiber, polystyrene fiber, butadiene fiber, and styrene fiber; in some specific embodiments of the present invention, the organic fiber includes one or more of polyester, polypropylene, and polyethylene fiber; in some examples of the present invention, the organic fiber is selected from polyester fiber.

[0075] In some embodiments of the present invention, the number of stacked layers is 50 to 1000 layers; in some embodiments of the present invention, the number of stacked layers is 100 to 1000 layers; in some specific embodiments of the present invention, the number of stacked layers is 120 to 600 layers; in some examples of the present invention, the number of stacked layers is 150 to 300 layers.

[0076] In some embodiments of the present invention, coarse fibers and fine fibers are stacked alternately.

[0077] Organic synthetic fibers in the prior art, 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 fiber arrangement direction is much larger than the number of fibers in the non-optimal fiber arrangement direction. 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 larger than the number of weft fibers. Figure 2 Schematic diagram of fiber stacking in the prior art. Figure 2 As shown, in the prior art, when the fibers are stacked, they are stacked in parallel in the same direction, and the A fibers (fine fibers) are optimally arranged in the warp direction, which is denoted as A 经 , stacked on the A fiber with the same optimal arrangement in the warp direction (B fiber (coarse fiber), denoted as B 经 The optimal arrangement directions of the two fibers are parallel to each other, and the stacking combination of the two fibers, 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, resulting in low porosity of the material, dense material, and poor thermal insulation performance. In the embodiment of the present invention, the coarse fiber and the fine fiber are stacked crosswise, as shown in the attached Figure 3 Schematic diagram of fiber stacking. Figure 3 As shown, A fibers (fine fibers) are optimally arranged in the warp direction, denoted as A 经 , stack the B fibers (coarse fibers) with the best weft arrangement on the A fibers, 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 fibers, i.e. the minimum fiber stacking unit, is denoted as A. 经 B 纬 . Because there is a certain cross angle between the two adjacent stacked fibers, the fibers in different layers can support each other, reducing the nesting of fibers in different layers, so that the resulting material has a larger porosity and better thermal insulation performance. Therefore, by cross-stacking, the fiber groups can be further prevented from nesting with each other, thereby increasing the porosity and reducing the thermal conductivity, resulting in an insulating material with excellent thermal insulation effect.

[0078] In some embodiments of the present invention, the crossing angle between the coarse fiber and the fine fiber is 35 to 90 degrees. It is understood that the crossing angle refers to the angle formed by the projection of the coarse fiber on the plane where the fine fiber is located and the fine fiber, or the angle formed by the projection of the fine fiber on the plane where the coarse fiber is located and the coarse fiber.

[0079] In some specific embodiments of the present invention, the crossing angle between the coarse fiber and the fine fiber is 40-90°; in some examples of the present invention, the crossing angle is 60-90°; in some specific examples of the present invention, the crossing angle is 80-90°. When the crossing angle is 90°, the coarse fiber and the fine fiber are orthogonally stacked.

[0080] In some specific embodiments of the present invention, the thermal insulation material is composed of a stack of a fine fiber group and a coarse fiber group, wherein the fine fiber group is composed of a plurality of fine fibers, and the coarse fiber group is composed of a plurality of coarse fibers.

[0081] In some specific embodiments of the present invention, the fine fiber group and the coarse fiber group are stacked alternately.

[0082] In some embodiments of the present invention, the surface texture of the coarse fiber or fine fiber includes one or more of plain weave, dotted weave, and patterned weave; in some specific embodiments of the present invention, the surface texture of the coarse fiber or fine fiber includes plain weave, dotted weave, or a combination thereof; in some examples of the present invention, the surface texture of the coarse fiber or fine fiber is selected from plain weave.

[0083] The second aspect of the present invention provides a method for preparing the thermal insulation material of the embodiment, comprising the following steps: stacking fine fibers and coarse fibers to obtain the thermal insulation material. The method for preparing the thermal insulation material provided by the embodiment of the present invention is simple and easy to operate.

[0084] In some embodiments of the present invention, after the fine fibers and the coarse fibers are stacked, a drying step is further included.

[0085] In some embodiments of the present invention, the drying temperature is 80-250°C; in some specific embodiments of the present invention, the drying temperature is 90-220°C; in some examples of the present invention, the drying temperature is 100-200°C; in some specific examples of the present invention, the drying temperature is 120-180°C.

[0086] In some embodiments of the present invention, the stacking method includes cross stacking or parallel stacking; cross stacking includes orthogonal stacking.

[0087] In some embodiments of the present invention, the cross-stacking method 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 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.

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

[0090] 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.

[0091] In some examples of the present invention, the method of performing orthogonal stacking includes the following steps:

[0092] 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.

[0093] In some specific embodiments of the present invention, the method for parallel stacking includes the following steps:

[0094] 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.

[0095] The third aspect of the present invention provides a thermal insulation core material, which includes the thermal insulation material of the embodiment of the present invention. The thermal insulation core material provided by the embodiment of the present invention has a high porosity, a low thermal conductivity, and an excellent thermal insulation effect.

[0096] The fourth aspect of the present invention provides an insulation board, which includes an insulation core material and a barrier film according to an embodiment of the present invention; wherein the barrier film is coated on the outside of the insulation core material. The insulation board provided by the embodiment of the present invention has a high porosity, a low thermal conductivity, and an excellent thermal insulation effect.

[0097] In some embodiments of the present invention, the barrier film includes one or more of a double-sided aluminum-coated film, a yin-yang film, and a double-sided aluminum-free film; in some specific embodiments of the present invention, the barrier film includes a double-sided aluminum-coated film, a yin-yang film, or a combination thereof; in some examples of the present invention, the barrier film is selected from a yin-yang film.

[0098] In some embodiments of the present invention, the thickness of the insulation board is 5 to 30 mm; in some specific embodiments of the present invention, the thickness of the insulation board is 6 to 25 mm; in some examples of the present invention, the thickness of the insulation board is 8 to 20 mm; in some specific examples of the present invention, the thickness of the insulation board is 8 to 12 mm.

[0099] The fifth aspect of the present invention provides a method for preparing the thermal insulation board of the embodiment, comprising the following steps: placing the thermal insulation core material into a barrier film, and vacuum packaging to obtain the thermal insulation board. The method for preparing the thermal insulation board provided by the embodiment of the present invention is simple and easy to operate.

[0100] In some embodiments of the present invention, the vacuum degree of the vacuum package is 0.0003~10Pa; in some embodiments of the present invention, the vacuum degree of the vacuum package is 0.0003~8Pa; in some embodiments of the present invention, the vacuum degree of the vacuum package is 0.0003~1.2Pa; in some specific embodiments of the present invention, the vacuum degree of the vacuum package is 0.0005~1Pa; in some examples of the present invention, the vacuum degree of the vacuum package is 0.0008~0.1Pa.

[0101] In some embodiments of the present invention, the vacuuming time of vacuum packaging is 8 to 140 minutes; in some specific embodiments of the present invention, the vacuuming time of vacuum packaging is 10 to 120 minutes; in some examples of the present invention, the vacuuming time of vacuum packaging is 30 to 80 minutes.

[0102] The sixth aspect of the present invention provides a temperature regulating device, which includes one or more of the thermal insulation material, thermal insulation core material, and thermal insulation board material of the embodiment of the present invention. The temperature regulating device provided by the embodiment of the present invention includes a thermal insulation material, a thermal insulation core material, or a thermal insulation board material, which has a high porosity, a low thermal conductivity, and an excellent thermal insulation effect, so it has a good temperature regulating effect.

[0103] In some embodiments of the present invention, the temperature regulating device includes a refrigeration device, a building insulation device, or a liquefied natural gas transportation device.

[0104] In some embodiments of the present invention, the refrigeration device includes one or more of a refrigerator, a freezer, a cold storage, and an air conditioner.

[0105] 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.

[0106] 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.

[0107] In a specific embodiment of the present invention, the barrier film used can be purchased from Anhui Kensihui, Shanghai Toppan or Fujian Saite.

[0108] 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".

[0109] After testing, a single organic fiber material A fiber (fine fiber) was used as A 经 A 经 As the minimum fiber stacking unit, parallel stacking is used to make an insulating material with a porosity of 56.2% and a thermal conductivity of 2.35mW / (m·K); B fiber (coarse fiber) is stacked in the form of B 经 B 经 As the minimum fiber stacking unit for parallel stacking, the porosity is 72.4% and the thermal conductivity is 2.16mW / (m·K). It can be seen that when a single organic fiber (A fiber or B fiber, A fiber is a thin fiber, B fiber is a thick fiber) is used for parallel stacking, the porosity is low and the thermal conductivity is high.

[0110] When two fibers A and B with different diameters are used to prepare thermal insulation materials by orthogonal stacking, the minimum fiber stacking unit is A 经 B 纬, the porosity can be increased to 63.6%, and the thermal conductivity can be reduced to 2.18mW / (m·K); and the minimum fiber stacking unit is A 经 A 纬 B 经 B 纬 The porosity of the obtained thermal insulation material can be increased to 82.2%, and the thermal conductivity can be reduced to 1.95 mW / (m·K). It can be seen that when coarse fibers and fine fibers of different diameters are orthogonally stacked, the porosity can be further increased and the thermal conductivity can be reduced.

[0111] Orthogonal stacking can also further obtain higher porosity and lower thermal conductivity. 经 A 纬 The thermal insulation material made from the smallest fiber stacking unit has a porosity of 60.5% and a thermal conductivity of 2.23 mW / (m·K). Figure 4 A 经 A 纬 SEM image of thermal insulation material made as the smallest fiber stacking unit. Figure 4 It can be seen that when orthogonally stacked, the thermal insulation material has a higher porosity.

[0112] The technical solution of the present invention will be better understood by referring to the specific embodiments and comparative examples below.

[0113] Thermal insulation material embodiment 1

[0114] This embodiment provides a thermal insulation material, which is composed of a fiber with a diameter of 13 μm and a gram weight of 18 g / m 2 Plain polyester clover-shaped fine fibers (A fibers), with a fiber diameter of 25 μm and a grammage of 20 g / m 2 The fabric is composed of 180 layers of plain woven polyester round coarse fibers (B fibers).

[0115] The specific preparation steps of the thermal insulation material of this embodiment are as follows:

[0116] The fiber diameter is 13μm and the weight is 18g / m 2 Plain polyester clover-shaped fine fibers (A fibers), with a fiber diameter of 25 μm and a grammage of 20 g / m 2 The plain weave polyester round coarse fiber (B fiber) is orthogonally stacked in sequence (the crossing angle is 90°), 180 layers are stacked, and the thermal insulation material is obtained after drying at 150°C.

[0117] The minimum fiber stacking unit of the thermal insulation material of this embodiment is denoted as A. 经 B 纬 .

[0118] Thermal insulation material embodiment 2

[0119] This embodiment provides a thermal insulation material, which is composed of a fiber with a diameter of 8 μm and a gram weight of 20 g / m 2 Plain weave polyester round fine fiber (A fiber), with a fiber diameter of 25 μm and a grammage of 20 g / m 2 The fabric is composed of 180 layers of plain woven polyester round coarse fibers (B fibers).

[0120] The specific preparation steps of the thermal insulation material of this embodiment are as follows:

[0121] The fiber diameter is 8μm and the weight is 20g / m 2 Plain weave polyester round fine fiber (A fiber), with a fiber diameter of 25 μm and a grammage of 20 g / m 2 The plain weave polyester round coarse fibers (B fibers) are sequentially orthogonally stacked (with a crossing angle of 90°), 180 layers are stacked, and the thermal insulation material is obtained after being dried at 130°C.

[0122] The minimum fiber stacking unit of the thermal insulation material of this embodiment is denoted as A. 经 B 纬 .

[0123] Thermal insulation material embodiment 3

[0124] This embodiment provides a thermal insulation material, which is composed of a fiber with a diameter of 11 μm and a gram weight of 15 g / m 2 Plain weave polyester round fine fiber (A fiber), with fiber diameter 35μm, gram weight 20g / m 2 The fabric is composed of 180 layers of plain woven polyester round coarse fibers (B fibers).

[0125] The specific preparation steps of the thermal insulation material of this embodiment are as follows:

[0126] The fiber diameter is 11μm and the weight is 15g / m 2 Plain weave polyester round fine fiber (A fiber), with fiber diameter 35μm, gram weight 20g / m 2 The plain weave polyester round coarse fibers (B fibers) are sequentially orthogonally stacked (with a crossing angle of 90°), 180 layers are stacked, and the thermal insulation material is obtained after being dried at 130°C.

[0127] The minimum fiber stacking unit of the thermal insulation material of this embodiment is denoted as A. 经 B 纬 .

[0128] Insulation Material Comparative Example 1

[0129] This comparative example provides a thermal insulation material, which is composed of a fiber with a diameter of 13 μm and a gram weight of 18 g / m 2The fabric is composed of 180 layers of plain-woven polyester clover-shaped fine fibers (A fibers).

[0130] The specific preparation steps of the thermal insulation material of this comparative example are as follows:

[0131] The fiber diameter is 13μm and the weight is 18g / m 2 The plain weave polyester clover-shaped fine fibers (A fibers) are sequentially orthogonally stacked (with a crossing angle of 90°), 180 layers are stacked, and the thermal insulation material is obtained after being dried at 150°C.

[0132] The minimum fiber stacking unit of the thermal insulation material of this comparative example is denoted as A. 经 A 纬 .

[0133] Insulation material comparative example 2

[0134] This comparative example provides a thermal insulation material, which is composed of a fiber with a diameter of 13 μm and a gram weight of 18 g / m 2 The fabric is composed of 180 layers of plain-woven polyester clover-shaped fine fibers (A fibers).

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

[0136] The fiber diameter is 13μm and the weight is 18g / m 2 The plain weave polyester clover-shaped fine fibers (A fibers) are sequentially stacked in parallel (with a cross angle of 0°), 180 layers are stacked, and the thermal insulation material is obtained after drying at 150°C.

[0137] The minimum fiber stacking unit of the thermal insulation material of this comparative example is denoted as A. 经 .

[0138] Insulation board embodiment 1

[0139] 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.

[0140] The specific steps for preparing the thermal insulation board of this embodiment are as follows:

[0141] 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.

[0142] 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).

[0143] Insulation board embodiment 2

[0144] 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.

[0145] The specific steps for preparing the thermal insulation board of this embodiment are as follows:

[0146] 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.

[0147] 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).

[0148] Insulation board embodiment 3

[0149] 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.

[0150] The specific steps for preparing the thermal insulation board of this embodiment are as follows:

[0151] 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.

[0152] The thickness of the thermal insulation board prepared in this embodiment is 8.5 mm and the density is 198 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 1.98mW / (m·K).

[0153] Insulation board comparative example 1

[0154] 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.

[0155] The specific steps for preparing the thermal insulation board of this embodiment are as follows:

[0156] 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.

[0157] The thickness of the thermal insulation board prepared in this comparative example 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).

[0158] Insulation board comparative example 2

[0159] 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.

[0160] The specific preparation steps of the thermal insulation board of this comparative example are as follows:

[0161] 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.

[0162] The thickness of the 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).

[0163] The fiber parameters, process conditions and board properties of thermal insulation board examples 1 to 3 and thermal insulation board comparative examples 1 to 2 are recorded in Table 1.

[0164] Table 1 Fiber parameters, process conditions and board properties of thermal insulation board examples 1 to 3 and thermal insulation board comparative examples 1 to 2

[0165]

[0166] Thermal insulation material embodiment 4

[0167] This embodiment provides a thermal insulation material, which is composed of a fiber with a diameter of 27 μm and a gram weight of 30 g / m 2 Fiber A', with a fiber diameter of 5 μm and a gram weight of 20 g / m 2 The plain woven polyester round fibers B' are stacked in layers, and the number of stacked layers is 180.

[0168] The specific preparation steps of the thermal insulation material of this embodiment are as follows:

[0169] The fiber diameter is 27μm and the weight is 30g / m 2 Fiber A', with a fiber diameter of 5 μm and a gram weight of 20 g / m 2 The plain weave polyester round fibers B' are orthogonally stacked (the cross angle is 90 degrees), 180 layers are stacked, and the heat insulating material is obtained after drying at 180°C.

[0170] The minimum fiber stacking unit of the thermal insulation material of this embodiment is denoted as A' 经 B' 纬 .

[0171] Insulation material comparative example 3

[0172] This comparative example provides a thermal insulation material, which is composed of a fiber with a diameter of 27 μm and a gram weight of 30 g / m 2 Fiber A', with a fiber diameter of 27 μm and a gram weight of 20 g / m 2 The plain woven polyester round fibers B' are stacked in layers, and the number of stacked layers is 180.

[0173] The specific preparation steps of the thermal insulation material of this comparative example are as follows:

[0174] The fiber diameter is 27μm and the weight is 30g / m 2 Fiber A', with a fiber diameter of 27 μm and a gram weight of 20 g / m 2 The plain weave polyester round fibers B' are orthogonally stacked (the cross angle is 90 degrees), 180 layers are stacked, and the thermal insulation material is obtained after drying at 180°C.

[0175] The minimum fiber stacking unit of the thermal insulation material of this comparative example is denoted as A' 经 B' 纬 .

[0176] Insulation board embodiment 4

[0177] 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.

[0178] The specific steps for preparing the thermal insulation board of this embodiment are as follows:

[0179] The thermal insulation material of Example 4 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.

[0180] 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 2.

[0181] Insulation board comparative example 3

[0182] 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.

[0183] The specific preparation steps of the thermal insulation board of this comparative example are as follows:

[0184] The thermal insulation material of comparative example 3 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.

[0185] 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 2.

[0186] Table 2 Fiber parameters and board properties of insulation board Example 4 and insulation board comparative example 3

[0187] Insulation board embodiment 4 Insulation board comparative example 3 Fiber A' diameter (μm) 27 27 Fiber B' diameter (μm) 5 27 Fiber Lamination Process Orthogonal stacking Orthogonal stacking Insulation board thickness (mm) 10.89 9.65 Thermal conductivity (mW / (m·K)) 1.93 2.43

[0188] It can be seen from the test results of the above embodiments that the embodiments of the present invention stack coarse fibers and fine fibers of different diameters. The coarse fibers have a larger diameter and greater rigidity. When subjected to external forces, they can maintain a smaller deformation and avoid collapse of the material structure, thereby 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 also has a lower thermal conductivity, further improving its thermal insulation effect.

[0189] Furthermore, the embodiments of the present invention use a cross-layering 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 embodiments of the present invention do not nest with each other, and when the insulating board is prepared by vacuum compression, the structure does not collapse, thereby effectively solving the problem of poor thermal insulation performance of existing organic fiber insulating boards.

[0190] 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.

[0191] In some embodiments of the present invention, the heat insulating board of the embodiment of the present invention is applied to a refrigeration device to obtain a refrigeration device with good heat insulation performance and good thermal insulation effect. The refrigeration device includes a refrigerator, a freezer, a cold storage or an air conditioner.

[0192] In some embodiments of the present invention, the thermal insulation board according to the embodiments of the present invention is applied to a building thermal insulation device, thereby obtaining a building thermal insulation device with good thermal insulation performance and good thermal insulation effect.

[0193] In some embodiments of the present invention, the thermal insulation board according to the embodiments of the present invention is applied to a liquefied natural gas transportation device, so as to obtain a liquefied natural gas transportation device with good thermal insulation performance and good heat preservation effect.

[0194] In the description of this specification, the description with reference to the terms "some embodiments", "examples" or "specific embodiments" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A thermal insulation material, characterized in that: The thermal insulation material is composed of stacked fine fibers and coarse fibers; the diameter of the fine fibers is 1 to 25 μm; and the diameter of the coarse fibers is ≥10 μm.

2. The thermal insulation material according to claim 1, characterized in that: The ratio of the diameter of the coarse fiber to the diameter of the fine fiber is ≥1.

8.

3. The thermal insulation material according to claim 1 or 2, characterized in that: The weight of the coarse fiber and the fine fiber is the same or different and is between 8 and 50 g / m 2 between.

4. The thermal insulation material according to claim 1 or 2, characterized in that: The cross-sectional shapes of the coarse fiber and the fine fiber are respectively selected from one or more of a circle, a triangle, a clover leaf, an ellipse, a T-shape, and a Y-shape.

5. The thermal insulation material according to claim 1 or 2, characterized in that: The coarse fibers and the fine fibers are independently selected from organic fibers.

6. The thermal insulation material according to claim 1 or 2, characterized in that: The number of the stacked layers is 50 to 1000.

7. The thermal insulation material according to claim 1 or 2, characterized in that: The coarse fibers and the fine fibers are cross-stacked.

8. The method for preparing the thermal insulation material according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: stacking the fine fibers and the coarse fibers to obtain the thermal insulation material.

9. 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 7.

10. A thermal insulation board, characterized in that: include: The thermal insulation core material according to claim 9; A barrier film covers the thermal insulation core material.

11. The thermal insulation board according to claim 10, characterized in that: The barrier film includes one or more of a double-sided aluminum-plated film, a cation-cation film, and a double-sided aluminum-free film.

12. The method for preparing the thermal insulation board according to claim 10 or 11, 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.

13. The method for preparing the thermal insulation board according to claim 12, characterized in that: The vacuum degree of the vacuum packaging is 0.0003-10Pa.

14. The method for preparing the thermal insulation board according to claim 12, characterized in that: The vacuum packaging vacuuming time is 8 to 140 minutes.

15. A temperature regulating device, characterized in that: It comprises one or more of the thermal insulation material according to any one of claims 1 to 7, the thermal insulation core material according to claim 9, and the thermal insulation board material according to claim 10 or 11.

16. The temperature adjustment device according to claim 15, characterized in that: The temperature regulating device includes a refrigeration device, a building insulation device or a liquefied natural gas transportation device.

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