Flexible non-dusting aerogel thermal insulation sheet and heat-not-burn smoking set

Abstract

The utility model discloses a kind of flexible non-dust aerogel heat insulation sheet and heating non-combustible smoking set, heat insulation sheet is composed of crosslinking silica aerogel and the nano-pore matrix layer of high-temperature-resistant flexible organic nanofiber composite, heat radiation resistant packaging coating, wherein nanofiber diameter 100-500nm, length-diameter ratio >100:1 and present three-dimensional net-like distribution, coating thickness 50-300 μm, heat insulation sheet dusting rate ≤0.01wt%, bending radius ≤1mm;A kind of flexible non-dust aerogel heat insulation sheet and heating non-combustible smoking set provided by the utility model, matrix layer is tightly wrapped by heat radiation resistant packaging coating, can avoid dust drop, pollute smoking set internal structure;It can be tightly fitted with smoking set special-shaped cavity, solve the problem that traditional material is difficult to adapt to narrow space. While meeting long-term high-frequency use demand, improve the overall reliability of smoking set.

Description

Technical Field

[0001] This utility model relates to the field of smoking accessories technology, and in particular to a flexible, non-powder-shedding aerogel heat insulation sheet and a heated, non-combustible smoking accessory. Background Technology

[0002] Traditional aerogel insulation sheets used in smoking appliances suffer from brittleness and a tendency to shed dust, which can contaminate the air passages or affect the performance of heating elements. Meanwhile, existing flexible insulation materials (such as ceramic fiber felt) have high thermal conductivity (>0.05 W / (m・K)), which cannot meet the requirements of heated tobacco products (HNB) for lightweight and efficient insulation. Therefore, there is an urgent need to develop an aerogel insulation sheet that combines flexibility, structural stability, and ultra-low thermal conductivity to adapt to the dynamic working environment of smoking appliances and address the shortcomings of existing materials in terms of toughness, insulation efficiency, and reliability.

[0003] Therefore, in view of the shortcomings of the existing technology, it is necessary to design a flexible, non-shedding aerogel heat insulation sheet and a heated, non-combustible smoke appliance to solve the above problems. Utility Model Content

[0004] To overcome the shortcomings of the prior art, the present invention aims to provide a flexible, non-powder-shedding aerogel insulation sheet and a heated, non-combustible smoke device.

[0005] To achieve the above and other related objectives, the technical solution provided by this utility model is: a flexible, non-shedding aerogel heat insulation sheet, wherein the heat insulation sheet is composed of a nanoporous matrix layer formed by cross-linked silica aerogel and high-temperature resistant flexible organic nanofibers, and a heat radiation resistant encapsulation coating covering the surface of the nanoporous matrix layer.

[0006] The preferred technical solution is that the density of the nanoporous matrix layer is 100-150 kg / m³.

[0007] The preferred technical solution is that the cross-linked silica aerogel has a pore size of 10-30 nm and a porosity of ≥90%.

[0008] The preferred technical solution is that the high-temperature resistant flexible organic nanofibers are distributed in a three-dimensional network in the nanoporous matrix layer.

[0009] The preferred technical solution is that the high-temperature resistant flexible organic nanofiber has a fiber diameter of 100-500nm and accounts for 5-20wt% of the nanoporous matrix layer.

[0010] The preferred technical solution is that the aspect ratio of the high-temperature resistant flexible organic nanofiber is >100:1.

[0011] The preferred technical solution is that the thickness of the heat radiation resistant encapsulation coating is 50-300μm.

[0012] The preferred technical solution is that the powder shedding rate of the heat insulation sheet is ≤0.01wt% and the bending radius is ≤1mm.

[0013] The preferred technical solution is that the thermal conductivity of the heat insulation sheet is 0.016-0.022 W / (m•K) under a test environment of 200℃.

[0014] A heated non-combustible smoke appliance includes the aforementioned flexible, non-shedding aerogel insulation sheet.

[0015] Due to the application of the above technical solution, the beneficial effects of this utility model are as follows:

[0016] This utility model provides a flexible, non-shedding aerogel heat insulation sheet and a heated, non-combustible smoking device. It employs a heat-radiation-resistant encapsulation coating to tightly wrap the substrate layer, preventing dust from falling off and contaminating the internal structure of the smoking device. It can also closely fit irregularly shaped cavities in the smoking device, solving the problem of traditional materials being unable to adapt to confined spaces. Simultaneously, it meets the requirements of long-term, high-frequency use, improving the overall reliability of the smoking device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the cross-section of the heat insulation sheet involved in this utility model.

[0018] Figure 2 This is a schematic cross-sectional view of the smoking device involved in this utility model. Detailed Implementation

[0019] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0020] Please see Figures 1-2 It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Example:

[0023] like Figure 1 As shown, according to the overall technical concept of this utility model, a flexible, non-shedding aerogel heat insulation sheet is provided. The heat insulation sheet 1 consists of a nanoporous matrix layer 11 formed by cross-linked silica aerogel and high-temperature resistant flexible organic nanofibers, and a heat-resistant radiation encapsulation coating 12 covering the surface of the nanoporous matrix layer 11. That is, the nanoporous matrix layer 11 is encapsulated in the heat-resistant radiation encapsulation coating 12. This structure can prevent the fibers from shedding powder after aging and falling into the smoking device.

[0024] like Figure 1 As shown, in an exemplary embodiment of this utility model, the density of the nanoporous matrix layer 11 is 100-150 kg / m³.

[0025] like Figure 1 As shown, in an exemplary embodiment of this utility model, the cross-linked silica aerogel has a pore size of 10-30 nm and a porosity of ≥90%.

[0026] like Figure 1 As shown, in an exemplary embodiment of this utility model, high-temperature resistant flexible organic nanofibers are distributed in a three-dimensional network in the nanoporous matrix layer 11. This structure enables the heat insulation sheet 1 to have a certain toughness when deformed, so as to meet the requirements of bending and fitting the irregular cavity of the smoking device.

[0027] like Figure 1 As shown, in an exemplary embodiment of this utility model, the high-temperature resistant flexible organic nanofiber has a fiber diameter of 100-500 nm and accounts for 5-20 wt% of the nanoporous matrix layer 11.

[0028] like Figure 1 As shown, in an exemplary embodiment of this utility model, the aspect ratio of the high-temperature resistant flexible organic nanofiber is >100:1.

[0029] like Figure 1 As shown, in an exemplary embodiment of this utility model, the thickness of the heat radiation resistant encapsulation coating 12 is 50-300μm, and the temperature resistance is ≥250℃.

[0030] like Figure 1 As shown, in an exemplary embodiment of this utility model, the powder shedding rate of the heat insulation sheet 1 is ≤0.01wt% (vibration test 100,000 times, frequency 50Hz), and the bending radius is ≤1mm.

[0031] like Figure 1 As shown, in an exemplary embodiment of this utility model, the thermal conductivity of the heat insulation sheet 1 under a test environment of 200℃ is 0.016-0.022 W / (m•K).

[0032] The following are methods for preparing heat insulation sheets:

[0033] Step 1: Sol-gel composite: The silicon source precursor is mixed with the high-temperature resistant organic fiber dispersion, and a wet gel is formed through a two-step acid-base catalysis.

[0034] Step 2: Supercritical drying: Drying under supercritical CO2 conditions (temperature 60℃, pressure 8MPa) to retain the porous structure;

[0035] Step 3: Surface coating: A heat radiation resistant coating is formed on the surface through a coating process.

[0036] Step 4: Molding process: Die-cut to fit the shape of the smoking device (ring / rectangle), and heat-seal the edges to avoid exposed edge fibers.

[0037] Advantages: Anti-powdering and heat radiation resistance: The heat radiation resistant encapsulation layer not only completely encapsulates the aerogel particles, with no visible dust falling off during vibration testing, but also reduces the thermal conductivity of the material at high temperatures, ensuring that the surface temperature of the smoking device is within the human comfort temperature range.

[0038] Flexible fit: It can be bent to fit the irregular cavity of the smoking device, increasing the installation success rate to over 99%;

[0039] Durability: After 500 hours of continuous operation at 250℃, the thermal insulation performance decreases by less than 1%.

[0040] like Figure 2 As shown, this utility model also relates to a heated non-combustible smoking device, including the aforementioned flexible non-powder-shedding aerogel heat insulation sheet; specifically, the smoking device includes a tubular smoking rod 2, the inner wall of the smoking rod 2 is provided with a heating tube 3, and the tube wall of the smoking rod 2 is filled with a flexible non-powder-shedding aerogel heat insulation sheet 1 corresponding to the heating tube 3.

[0041] Therefore, this utility model has the following advantages:

[0042] This utility model provides a flexible, non-shedding aerogel heat insulation sheet and a heated, non-combustible smoking device. It employs a heat-radiation-resistant encapsulation coating to tightly wrap the substrate layer, preventing dust from falling off and contaminating the internal structure of the smoking device. It can also closely fit irregularly shaped cavities in the smoking device, solving the problem of traditional materials being unable to adapt to confined spaces. Simultaneously, it meets the requirements of long-term, high-frequency use, improving the overall reliability of the smoking device.

[0043] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A flexible, non-shedding powder aerogel insulation sheet, characterized in that: The heat insulation sheet consists of a nanoporous matrix layer formed by cross-linked silica aerogel and high-temperature resistant flexible organic nanofibers, and a heat-resistant encapsulation coating covering the surface of the nanoporous matrix layer.

2. The flexible, non-shedding powder aerogel insulation sheet according to claim 1, characterized in that: The density of the nanoporous matrix layer is 100-150 kg / m³.

3. The flexible, non-shedding powder aerogel insulation sheet according to claim 1, characterized in that: The cross-linked silica aerogel has a pore size of 10-30 nm and a porosity of ≥90%.

4. The flexible, non-shedding powder aerogel insulation sheet according to claim 1, characterized in that: The high-temperature resistant flexible organic nanofibers are distributed in a three-dimensional network in the nanoporous matrix layer.

5. The flexible, non-shedding powder aerogel insulation sheet according to claim 1, characterized in that: The high-temperature resistant flexible organic nanofibers have a fiber diameter of 100-500 nm and account for 5-20 wt% of the nanoporous matrix layer.

6. The flexible, non-shedding aerogel insulation sheet according to claim 1, characterized in that: The aspect ratio of the high-temperature resistant flexible organic nanofiber is >100:

1.

7. The flexible, non-shedding powder aerogel insulation sheet according to claim 1, characterized in that: The thickness of the heat radiation resistant encapsulation coating is 50-300 μm.

8. The flexible, non-shedding powder aerogel insulation sheet according to claim 1, characterized in that: The heat insulation sheet has a powder shedding rate of ≤0.01wt% and a bending radius of ≤1mm.

9. The flexible, non-shedding powder aerogel insulation sheet according to claim 1, characterized in that: The thermal conductivity of the insulation sheet is 0.016-0.022 W / (m•K) under a test environment of 200℃.

10. A heated non-combustible smoking appliance, characterized in that: Including the flexible, non-shedding aerogel insulation sheet as described in any one of claims 1-6.

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