Novel fireproof heat insulation pad

Abstract

The utility model discloses a novel fireproof heat insulation pad which comprises a base plate, a mica sheet, a flame-retardant tissue paper bonding layer and a fireproof expansion coating, and the base plate is arranged to be a nanometer micropore heat insulation sheet; the two layers of mica sheets are respectively adhered to the two surfaces of the substrate; the flame-retardant tissue paper bonding layer is adhered to one side, far away from the substrate, of one mica sheet; the fireproof expansion coating is arranged on the side, away from the base plate, of the other mica sheet. According to the novel fireproof heat insulation pad, the fireproof heat insulation performance can be improved, and the use safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fireproof and heat-insulating products, and particularly relates to a novel fireproof and heat-insulating pad. Background Art

[0002] The thermal runaway technology of power battery packs is one of the key technologies in electric new energy vehicles. It can effectively control the temperature of the battery, ensure the normal operation of the battery, reduce pollution emissions and energy consumption.

[0003] In terms of battery assembly, especially the barrier between battery cells in a battery pack, currently, materials with lower thermal conductivity and higher fireproof and heat-insulating properties are considered to be used to reduce the temperature between battery cells and reduce the spread and occurrence of thermal runaway. Therefore, the market demand for fireproof and heat-insulating products has emerged. Currently, traditional pre-oxidized fibers, glass fibers, and ceramic fiber aerogel felts on the market are all used in the form of products obtained by compounding aerogel with fiber felt substrates. Although the fireproof and heat-insulating effect has been improved, they can only be used below 1000°C, and the anti-rebound elasticity is also not good.

[0004] In addition to the new energy field, in the aspect of building exterior walls, when it is too hot in summer, there will also be local overheating on the outer side of the wall, which is prone to cause fires, and the highest fire temperature is also around 800 - 1200°C.

[0005] In the field of high-temperature equipment in the thermoelectric field, the relatively high temperature will cause certain losses to the equipment life.

[0006] In aerospace technology, the requirements for the fireproof and heat-insulating properties of thermal insulation materials are also very high.

[0007] However, the current fireproof and heat-insulating pads have poor fireproof and heat-insulating performance at high temperatures, resulting in low use safety. Summary of the Utility Model

[0008] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a novel fireproof and heat-insulating pad, which can improve the fireproof and heat-insulating performance and the use safety.

[0009] A novel fireproof and heat-insulating pad according to the first aspect embodiment of the utility model includes: a substrate, which is set as a nano-porous heat-insulating sheet; mica sheets, two layers are provided, and the two mica sheets are respectively pasted on both sides of the substrate; a flame-retardant cotton paper bonding layer, which is adhered to one side of one of the mica sheets away from the substrate; and a fireproof expansion coating, which is provided on the other side of the other mica sheet away from the substrate.

[0010] A novel fireproof and heat-insulating pad according to the embodiment of the utility model has at least the following beneficial effects:

[0011] 1. By setting the substrate as a nano-porous heat insulation sheet in the present utility model, it can be understood that, compared with the traditional aerogel felts on the current market, such as pre-oxidized fiber, glass fiber, and ceramic fiber aerogel felts, which are composed of aerogel and fiber felt substrates, the nano-porous heat insulation sheet has better heat insulation effect and compression resistance. At the same time, the nano-porous heat insulation sheet has a low thermal conductivity and can withstand high temperatures of 1200°C in the short term, making the fireproof heat insulation pad not easily burned through. Thus, the fireproof heat insulation pad has better high-temperature flame impact resistance and high-temperature and high-pressure heat insulation performance. Furthermore, the fireproof and heat insulation performance of the fireproof heat insulation pad is improved, and the use safety of the fireproof heat insulation pad is enhanced.

[0012] 2. By setting two layers of mica sheets in the present utility model, the two layers of mica sheets are respectively pasted on both sides of the substrate. It can be understood that the mica sheet has good flame retardant and fireproof properties. By combining the mica sheet and the nano-porous heat insulation sheet, both materials have strong fireproof properties, solving the problem that the overall surface of the fireproof heat insulation pad is not fireproof. At the same time, the insulation properties of the mica sheet and the nano-porous heat insulation sheet are also very excellent, which can improve the insulation performance of the fireproof heat insulation pad.

[0013] 3. By setting a flame retardant cotton paper adhesive layer in the present utility model, the flame retardant cotton paper adhesive layer adheres to one side of one layer of mica sheet away from the substrate. Thus, the fireproof heat insulation pad can be fixed to the object to be used through the flame retardant cotton paper adhesive layer, and further, it is convenient for the installation and fixation of the fireproof heat insulation pad.

[0014] 4. By setting a fireproof expansion coating in the present utility model, the fireproof expansion coating is arranged on the side of the other layer of mica sheet away from the substrate. Thus, the fireproof expansion coating can face the side of the fireproof heat insulation pad away from the object to be used, and the fireproof expansion layer can serve as the first barrier facing high temperatures in the fireproof heat insulation pad. When the fireproof expansion layer is heated, it can expand, playing a role in heat resistance and fire prevention, and further improving the fireproof and heat insulation performance of the fireproof heat insulation pad.

[0015] According to some embodiments of the present utility model, the substrate is set as a silica nano-porous heat insulation sheet.

[0016] According to some embodiments of the present utility model, the pore diameter of the silica in the substrate < 50nm.

[0017] According to some embodiments of the present utility model, the thickness of the substrate is 1mm - 5mm.

[0018] According to some embodiments of the present utility model, the fireproof expansion coating is a water-based epoxy resin intumescent fireproof coating, an acrylic resin intumescent fireproof coating, or a polyurethane-based intumescent fireproof coating.

[0019] According to some embodiments of the present utility model, the thickness of the fireproof expansion coating is 0.1mm - 0.2mm.

[0020] According to some embodiments of the present utility model, a silicone adhesive layer is provided between the substrate and the mica sheet, and the silicone adhesive layer is used to bond the substrate and the mica sheet.

[0021] According to some embodiments of the present utility model, there are two layers of the silicone adhesive layer, and the two layers of the silicone adhesive layer are respectively disposed on two sides of the substrate.

[0022] According to some embodiments of the present utility model, the thickness of the silicone adhesive layer is 50 μm - 100 μm.

[0023] According to some embodiments of the present utility model, a release film is disposed on a side of the flame retardant cotton paper adhesive layer away from the mica sheet.

[0024] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 is a schematic structural diagram of a novel fireproof and heat-insulating pad according to an embodiment of the present utility model;

[0027] Figure 2 is Figure 1 a front view shown;

[0028] Figure 3 is Figure 2 an A-A cross-sectional view shown.

[0029] Reference numerals: 100 - substrate, 110 - mica sheet, 120 - flame retardant cotton paper adhesive layer, 130 - fireproof expansion coating, 140 - silicone adhesive layer, 150 - release film. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.

[0031] In the description of the present utility model, it should be understood that regarding the orientation description, such as the upper, lower, front, rear, left, right, etc. indicating the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0032] In the description of the present utility model, the meaning of "a number of" is one or more, the meaning of "a plurality of" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0033] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0034] The following describes a novel fireproof and heat-insulating pad according to an embodiment of the present utility model with reference to the drawings.

[0035] Refer to Figure 1 、 Figure 2 and Figure 3 A novel fireproof and heat-insulating pad according to an embodiment of the present utility model includes a substrate 100, mica sheets 110, a flame-retardant cotton paper adhesive layer 120, and a fireproof expansion coating 130.

[0036] For the substrate 100, the substrate 100 is provided as a nano-porous heat-insulating sheet.

[0037] It can be understood that compared with the traditional aerogel felts on the current market, such as pre-oxidized fibers, glass fibers, and ceramic fiber aerogel felts, which are composites of aerogel and fiber felt substrates, the nano-porous heat-insulating sheet has better heat-insulating effects and compression resistance. At the same time, the nano-porous heat-insulating sheet has a low thermal conductivity and can withstand a high temperature of 1200 °C in the short term, making the fireproof and heat-insulating pad not easily burned through. Thus, the fireproof and heat-insulating pad has better high-temperature flame impact resistance and high-temperature and high-pressure heat-insulating performance. Furthermore, the fireproof and heat-insulating performance of the fireproof and heat-insulating pad is improved, and the use safety of the fireproof and heat-insulating pad is enhanced.

[0038] It should be noted that the nano-microporous heat insulation sheet is an existing heat insulation material on the market.

[0039] Specifically, the substrate 100 is physically mixed with auxiliary agents such as nano heat insulation powder and light-shielding agent, and is formed by hot pressing under high temperature and high pressure. The finished sheet has extremely strong compressive performance, and has extremely low thermal conductivity at normal temperature and high temperature, and has excellent high-temperature flame impact resistance and high-temperature and high-pressure heat insulation performance. Therefore, the substrate 100 has good performance in insulation, heat insulation, fire prevention and flame retardancy, and compression resistance.

[0040] Further, the substrate 100 is set as a silica nano-microporous heat insulation sheet.

[0041] It should be noted that the silica nano-microporous heat insulation sheet is a nano-microporous heat insulation sheet based on nano-microporous silica.

[0042] It can be understood that the nano-microporous heat insulation sheet based on nano-microporous silica is a sheet with high temperature resistance, high flame retardancy, low thermal conductivity, and excellent electrical characteristics. Especially, the thermal conductivity is extremely good under high-temperature working conditions. Therefore, the good fire and heat insulation performance of the fire and heat insulation pad is ensured.

[0043] Further, the pore diameter of the silica in the substrate 100 < 50nm, so that the substrate 100 is light in weight and has a low thermal conductivity.

[0044] Further, the thermal conductivity of the substrate 100 is lower than 0.02W / (m*K), so that the substrate 100 can withstand high temperature of 1200°C in the short term, and the formed substrate 100 is not easily burned through.

[0045] In some specific embodiments, the thickness of the substrate 100 is 1mm - 5mm, so that the substrate 100 has good structural strength, high-temperature flame impact resistance and high-temperature and high-pressure heat insulation performance.

[0046] For the mica sheet 110, two layers of mica sheets 110 are provided, and the two layers of mica sheets 110 are respectively pasted on both sides of the substrate 100.

[0047] It can be understood that the mica sheet 110 has good flame retardancy and fire prevention performance. By combining the mica sheet 110 and the nano-microporous heat insulation sheet, both materials have strong fire prevention performance, solving the problem that the overall surface of the fire and heat insulation pad is not fireproof. At the same time, the mica sheet 110 and the nano-microporous heat insulation sheet also have excellent insulation properties, which can improve the insulation of the fire and heat insulation pad.

[0048] Specifically, the thickness of the mica sheet 110 is in the range of 0.1mm - 1.0mm, so that the mica sheet 110 can achieve fire prevention performance exceeding 1000°C while ensuring a relatively thin thickness, will not be burned through for a long time, and has good insulation performance after high temperature.

[0049] In some specific embodiments, a silicone adhesive layer 140 is provided between the substrate 100 and the mica sheet 110, and the silicone adhesive layer 140 is used to bond the substrate 100 and the mica sheet 110.

[0050] It can be understood that, compared with the commonly used flame-retardant cotton paper double-sided tape, the silicone adhesive layer 140 has better heat resistance and is not prone to generate open flames.

[0051] Furthermore, two layers of the silicone adhesive layer 140 are provided, and the two layers of the silicone adhesive layer 140 are respectively provided on both sides of the substrate 100, so that the adhesive layers on both sides of the substrate 100 have better heat resistance.

[0052] In some specific embodiments, the thickness of the silicone adhesive layer 140 is 50μm - 100μm, so as to ensure that the thickness of the silicone adhesive layer 140 is relatively thin, and further avoid that the silicone adhesive layer 140 has too great an impact on the overall thickness of the fireproof and heat-insulating pad.

[0053] For the flame-retardant cotton paper adhesive layer 120, the flame-retardant cotton paper adhesive layer 120 adheres to the side of one layer of the mica sheet 110 away from the substrate 100, so that the fireproof and heat-insulating pad can be fixed to the object to be used through the flame-retardant cotton paper adhesive layer 120, and further, it is convenient to install and fix the fireproof and heat-insulating pad.

[0054] Specifically, the thickness of the flame-retardant cotton paper adhesive layer 120 is 0.1mm ± 0.02mm, so that the flame-retardant cotton paper adhesive layer 120 has a relatively thin thickness.

[0055] For the fireproof expansion coating 130, the fireproof expansion coating 130 is provided on the side of the other layer of the mica sheet 110 away from the substrate 100, so that the fireproof expansion coating 130 can face the side of the fireproof and heat-insulating pad away from the object to be used, and the fireproof expansion layer can serve as the first layer of barrier against high temperature in the fireproof and heat-insulating pad. When the fireproof expansion layer is heated, it can expand to play a role in heat resistance and fire prevention, and further improve the fireproof and heat-insulating performance of the fireproof and heat-insulating pad.

[0056] It can be understood that the fireproof expansion coating 130 decomposes into gases when heated, and at the same time, the foaming thickness of the fireproof expansion coating 130 increases to form an expanded sponge structure with high heat-insulating performance, which inhibits the spread of flames and isolates the transfer of heat.

[0057] Specifically, the thickness of the fireproof expansion coating 130 is 0.1mm - 0.2mm.

[0058] In some specific embodiments, the fireproof expansion coating 130 is a water-based epoxy resin intumescent fireproof coating, an acrylic resin intumescent fireproof coating, or a polyurethane-based intumescent fireproof coating. Thus, it ensures excellent fireproof performance of the fireproof expansion coating 130, and it is easy to purchase on the market with convenient material sources.

[0059] In some specific embodiments, a release film 150 is provided on the side of the flame retardant tissue adhesive layer 120 away from the mica sheet 110.

[0060] It can be understood that the release film 150 has no stickiness or slight stickiness after contacting a specific material under limited conditions. It can isolate the flame retardant tissue adhesive layer 120 from the outside, can provide good sealing for the flame retardant tissue adhesive layer 120, has a dust-proof protection effect, and is easy to peel off the release film 150 when using the fireproof and heat-insulating pad.

[0061] Furthermore, the thickness of the release film 150 is 0.025 mm - 0.075 mm.

[0062] In this embodiment, with the heat resistance and fireproof properties of the fireproof expansion coating 130, it plays the first layer of protection role; then, the extremely strong fire flame impact resistance of the mica sheet 110 brings the second layer of protection effect to the whole product. And the substrate 100 is selected as a nano-porous heat-insulating sheet, which has a lower thermal conductivity than materials such as aerogel felt and fireproof ceramic wool at normal temperature or even high temperature, and has a better heat-insulating and fireproof effect under working conditions above 1000 °C. Finally, the nano heat-insulating board can be selected with a thickness of 1.0 mm - 5.0 mm, and the mica sheet 110 can be selected with a specification of 0.1 mm - 1.0 mm, and there are many combination methods to meet different fireproof and heat-insulating performance requirements.

[0063] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example 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 can be combined in a suitable manner in any one or more embodiments or examples.

[0064] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those of ordinary skill in the art.

Claims

1. A new type of fireproof and heat-insulating pad, characterized in that: include: The substrate (100) is configured as a nano-microporous heat insulation sheet; The mica sheet (110) is provided with two layers, and the two layers of the mica sheet (110) are respectively adhered to two surfaces of the substrate (100); A flame retardant tissue paper adhesive layer (120) adhered to a side of one of the mica sheets (110) away from the substrate (100); The fireproof expansion coating (130) is arranged on a side of another layer of the mica sheet (110) away from the substrate (100).

2. A novel fireproof heat insulation pad according to claim 1, characterized in that: The substrate (100) is configured as a silicon dioxide nanoporous heat insulation sheet.

3. A novel fireproof heat insulation pad according to claim 2, characterized in that: The pore size of the silicon dioxide of the substrate (100) is less than 50 nm.

4. A novel fireproof heat insulation pad according to claim 1, characterized in that: The thickness of the substrate (100) is 1 mm to 5 mm.

5. A novel fireproof heat insulation pad according to claim 1, characterized in that: The fireproof expansion coating (130) is a water-based epoxy resin expansion type fireproof coating, an acrylic resin expansion type fireproof coating or a polyurethane-based expansion type fireproof coating.

6. A novel fireproof heat insulation pad according to claim 1, characterized in that: The thickness of the fire-resistant expansion coating (130) is 0.1 mm-0.2 mm.

7. A novel fireproof heat insulation pad according to claim 1, characterized in that: An organic silicon adhesive layer (140) is provided between the substrate (100) and the mica sheet (110), and the organic silicon adhesive layer (140) is used to bond the substrate (100) and the mica sheet (110).

8. A novel fireproof heat insulation pad according to claim 7, characterized in that: The organic silicon adhesive layer (140) is provided with two layers, and the two layers of the organic silicon adhesive layer (140) are respectively provided on two surfaces of the substrate (100).

9. A novel fireproof heat insulation pad according to claim 7, characterized in that: The thickness of the organic silicon adhesive layer (140) is 50 μm-100 μm.

10. A novel fireproof heat insulation pad according to claim 1, characterized in that: A release film (150) is provided on the side of the flame-retardant tissue paper adhesive layer (120) away from the mica sheet (110).

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