Self-repairing nanocrystal leakproof film for electronic cigarette atomizing core

Abstract

This utility model discloses a self-healing nanocrystalline leak-proof film for electronic cigarette atomizer cores, belonging to the technical field of sealing films for electronic cigarette atomizer cores. Key technical features include a film body comprising, from the inside out, a nanocrystalline reinforced base layer, a self-healing functional layer, a corrosion-resistant isolation layer, and a thermally conductive adhesive layer. These layers are bonded together by hot-pressing with a modified epoxy resin film. The nanocrystalline reinforced base layer provides high strength and high-temperature resistance, preventing cracking caused by thermal expansion and contraction. The thermally conductive adhesive layer ensures a tight fit with the atomizer core, blocking leakage paths. Furthermore, the microcapsule repair agent in the self-healing functional layer automatically cures and fills cracks when they appear, restoring sealing performance and reducing replacement frequency. The corrosion-resistant isolation layer uses a chemically stable material to resist corrosion from components such as propylene glycol and glycerin, extending the film's service life.

Description

Technical Field

[0001] This utility model relates to the field of sealing film technology for electronic cigarette atomizer cores, and in particular to a self-healing nanocrystalline leak-proof film for electronic cigarette atomizer cores. Background Technology

[0002] Leak-proof film for e-cigarette atomizer cores is a functional film material used in e-cigarette atomizer cores to prevent e-liquid leakage during operation.

[0003] As the core component of e-cigarettes, the sealing performance of the atomizer coil directly affects the safety and user experience. Existing film materials used for atomizer coils have the following defects: Traditional films (such as ordinary PET and silicone films) are prone to micro-cracks due to thermal expansion and contraction in high-temperature atomization environments, leading to e-liquid leakage, contaminating the device and affecting the taste. Furthermore, once the film is damaged, it cannot repair itself, requiring frequent replacement of the atomizer coil and increasing usage costs. At the same time, propylene glycol, glycerin, and flavoring components in e-liquid can easily corrode the film, causing material aging and failure, and shortening its service life.

[0004] To address this, a self-healing nanocrystalline leak-proof film for electronic cigarette atomizing cores is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a self-healing nanocrystalline leak-proof film for e-cigarette atomizer cores, which can solve the following defects of existing film materials used in e-cigarette atomizer cores: traditional films are prone to micro-cracks due to thermal expansion and contraction in high-temperature atomization environments, leading to e-liquid leakage, contaminating the device and affecting the taste. Moreover, the film cannot repair itself after being damaged, requiring frequent replacement of the atomizer core, which increases the cost of use. At the same time, propylene glycol, glycerin and flavoring components in e-liquid are prone to corroding the film, causing material aging and failure, and shortening its service life.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a self-healing nanocrystalline anti-leakage film for electronic cigarette atomizing core, comprising a film body, wherein the film body comprises, from the inside out, a nanocrystalline reinforced base layer, a self-healing functional layer, a corrosion-resistant isolation layer and a thermally conductive adhesive layer, and the layers are hot-pressed together by a modified epoxy resin film.

[0007] Preferably, the nanocrystalline reinforced base layer is composed of iron-based nanocrystalline strips with a thickness of 10-20 μm, and silicon carbide particles with a particle size of 50-100 nm are uniformly distributed inside the nanocrystalline reinforced base layer.

[0008] Preferably, the self-healing functional layer includes microcapsules and a matrix adhesive, wherein the microcapsules are uniformly dispersed in the matrix adhesive and encapsulate a two-component epoxy resin repair agent inside, and the capsule wall is urea-formaldehyde resin.

[0009] Preferably, the matrix adhesive is composed of polyetheretherketone resin and contains 0.5% graphene nanosheets.

[0010] Preferably, the corrosion-resistant isolation layer is composed of a fluorinated ethylene propylene copolymer film with a thickness of 3-5 μm.

[0011] Preferably, the thermally conductive adhesive layer is composed of a graphene-organic silicon composite adhesive layer with a thickness of 2-4 μm.

[0012] Preferably, the surface of the thermally conductive adhesive layer is provided with micro-venting grooves with a spacing of 1-2 mm.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This application provides high strength and high temperature resistance through nanocrystalline reinforced base layer, which can prevent cracking caused by thermal expansion and contraction, while thermally conductive adhesive layer ensures tight adhesion to atomizing core, blocking leakage path, and microcapsule repair agent through self-healing functional layer can automatically solidify and fill cracks when they appear, restoring sealing performance and reducing replacement frequency;

[0015] 2. This application uses a corrosion-resistant isolation layer made of a chemically stable material to resist the erosion of components such as propylene glycol and glycerin, thereby extending the service life of the film. Attached Figure Description

[0016] Figure 1 This is an overall structural diagram of the self-healing nanocrystalline leak-proof film for electronic cigarette atomizing core of this utility model;

[0017] Figure 2 This is an exploded view of the main body of the film of this utility model;

[0018] Figure 3 This is an exploded view of the self-healing functional layer of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the thermally conductive adhesive layer of this utility model.

[0020] In the figure, 1 is the thin film substrate; 2 is the nanocrystalline reinforced base layer; 3 is the self-healing functional layer; 31 is the microcapsule; 32 is the matrix adhesive; 4 is the corrosion-resistant isolation layer; and 5 is the thermally conductive adhesive layer. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 The present invention provides the following technical solution:

[0023] The self-healing nanocrystalline leak-proof film for electronic cigarette atomizing core includes a film body 1. The film body 1 includes, from the inside out, a nanocrystalline reinforced base layer 2, a self-healing functional layer 3, a corrosion-resistant isolation layer 4, and a thermally conductive adhesive layer 5. The layers are bonded together by hot pressing with a modified epoxy resin film.

[0024] In this embodiment, the film body 1 is designed with a layered structure consisting of a nanocrystalline reinforced base layer 2, a self-healing functional layer 3, a corrosion-resistant isolation layer 4, and a thermally conductive adhesive layer 5. Combined with the hot-pressing composite of a modified epoxy resin film, it forms an integrated structure that is leak-proof, repairable, corrosion-resistant, and bonded. The nanocrystalline reinforced base layer 2 provides mechanical support and high-temperature resistance, preventing cracking caused by thermal expansion and contraction. The self-healing functional layer 3 enables self-repair of damage, automatically curing and filling cracks when they appear, restoring sealing performance and reducing replacement frequency. Furthermore, the corrosion-resistant isolation layer 4 blocks e-liquid erosion, extending the film's service life. Finally, the thermally conductive adhesive layer 5 ensures a tight bond with the atomizing core, preventing leakage caused by detachment at high temperatures. Therefore, the four layers work together to solve the problems of easy leakage, lack of repair capability, and poor corrosion resistance of traditional films, significantly improving the safety and lifespan of electronic cigarette atomizing cores.

[0025] Specifically, such as Figure 2 As shown, the nanocrystalline reinforced base layer 2 is composed of iron-based nanocrystalline strips with a thickness of 10-20 μm. Silicon carbide particles with a particle size of 50-100 nm are uniformly distributed inside the nanocrystalline reinforced base layer 2.

[0026] Specifically, such as Figure 3 As shown, the self-healing functional layer 3 includes microcapsules 31 and matrix adhesive 32. The microcapsules 31 are uniformly dispersed in the matrix adhesive 32 and encapsulate a two-component epoxy resin repair agent inside. The capsule wall is urea-formaldehyde resin.

[0027] Specifically, such as Figure 3 As shown, the matrix adhesive 32 is composed of polyetheretherketone resin and contains 0.5% graphene nanosheets.

[0028] In this embodiment: the nanocrystalline reinforced base layer 2 uses 10-20μm iron-based nanocrystalline strips, which possess high mechanical strength and high temperature resistance, resisting thermal stress during atomizer core operation and preventing film deformation. Furthermore, the uniformly distributed 50-100nm silicon carbide particles within further enhance the base layer's hardness and wear resistance, reducing microcracks caused by friction or thermal expansion and contraction, fundamentally reducing the risk of e-liquid leakage. The self-healing functional layer 3 encapsulates a two-component epoxy resin repair agent in microcapsules 31. When microcracks appear in the film, the microcapsules 31 rupture under stress, releasing the repair agent, which then rapidly cures at ambient temperature. Cracks can be filled within 4 hours (repairing damage with a diameter ≤0.5mm), restoring sealing performance. This design avoids the problem of having to replace the entire film after it is damaged, extending the life of the atomizing core and reducing usage costs. Meanwhile, the base adhesive 32 is made of polyetheretherketone resin, which has excellent high temperature resistance and chemical stability, making it suitable for the high temperature environment of the atomizing core. The added 0.5% graphene nanosheets can improve the thermal conductivity of the functional layer, accelerate the curing reaction of the repair agent (curing time shortened to less than 12 hours), and enhance the mechanical strength of the base adhesive 32, preventing the self-healing layer from being damaged by external forces and ensuring the long-term effectiveness of the repair function.

[0029] Specifically, such as Figure 2 As shown, the corrosion-resistant isolation layer 4 is composed of a fluorinated ethylene propylene copolymer film with a thickness of 3-5 μm.

[0030] In this embodiment: the corrosion-resistant isolation layer 4 is made of a 3-5μm fluorinated ethylene propylene copolymer film. The FEP material has excellent chemical inertness and can withstand long-term corrosion from components such as propylene glycol, glycerin and flavorings in e-liquid, thus preventing the film from perforating or aging due to chemical corrosion.

[0031] Specifically, such as Figure 2 As shown, the thermally conductive adhesive layer 5 is composed of a graphene-organic silicon composite adhesive layer with a thickness of 2-4 μm.

[0032] Specifically, such as Figure 4 As shown, the surface of the thermally conductive adhesive layer 5 is provided with micro-venting grooves with a spacing of 1-2mm.

[0033] In this embodiment: the thermally conductive adhesive layer 5 is made of a 2-4μm graphene-silicone composite adhesive layer. The silicone matrix has high adhesion and high temperature resistance, which can be tightly bonded to the metal base of the atomizing core, preventing leakage caused by detachment at high temperatures. The graphene components are oriented along the film surface to form a thermally conductive path, which can quickly transfer the heat of the atomizing core, avoid film aging caused by local overheating, and improve atomization efficiency. Furthermore, the micro-venting grooves (groove width 0.1-0.2mm, spacing 1-2mm) on the surface of the thermally conductive adhesive layer 5 can expel air between the interfaces during the bonding process between the film and the atomizing core, avoiding loose bonding caused by residual air bubbles (air bubbles will form leakage channels), ensuring 100% effective contact between the adhesive layer and the base, and further enhancing the sealing performance.

[0034] Working principle: When the film body 1 is in use, the film body 1 is designed with a layered structure of nanocrystalline reinforced base layer 2, self-healing functional layer 3, corrosion-resistant isolation layer 4 and thermally conductive adhesive layer 5. Combined with the hot-pressing composite of modified epoxy resin film, it forms an integrated structure that is leak-proof, repairable, corrosion-resistant and adhesive. Among them, nanocrystalline reinforced base layer 2 provides mechanical support and high temperature resistance, which can prevent cracking caused by thermal expansion and contraction. The self-healing functional layer 3 can automatically repair damage and can automatically solidify and fill cracks when they appear, restoring sealing performance and reducing replacement frequency. Furthermore, the corrosion-resistant isolation layer 4 can block e-liquid corrosion and extend the service life of the film. Finally, the thermally conductive adhesive layer 5 ensures a tight fit with the atomizer core and prevents leakage caused by falling off at high temperatures. Therefore, the four layers work together to solve the problems of easy leakage, lack of repair ability and poor corrosion resistance of traditional films, significantly improving the safety and lifespan of electronic cigarette atomizer cores.

[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-repairing nanocrystal anti-leakage film for an electronic cigarette atomizing core, comprising a film main body (1), characterized in that: The film body (1) includes, from the inside out, a nanocrystalline reinforced base layer (2), a self-healing functional layer (3), a corrosion-resistant isolation layer (4), and a thermally conductive adhesive layer (5), and the layers are bonded together by hot pressing with a modified epoxy resin film.

2. The self-repairing nanocrystal anti-leakage film for the electronic cigarette atomizing core according to claim 1, characterized in that: The nanocrystalline reinforced base layer (2) is composed of iron-based nanocrystalline strips with a thickness of 10-20 μm.

3. The self-repairing nanocrystal anti-leakage film for the electronic cigarette atomizing core according to claim 1, characterized in that: The self-healing functional layer (3) includes microcapsules (31) and a matrix adhesive (32). The microcapsules (31) are uniformly dispersed in the matrix adhesive (32) and encapsulate a two-component epoxy resin repair agent inside. The capsule wall is made of urea-formaldehyde resin.

4. The self-healing nanocrystalline leak-proof film for electronic cigarette atomizing core according to claim 3, characterized in that: The matrix adhesive (32) is composed of polyetheretherketone resin.

5. The self-healing nanocrystalline leak-proof film for electronic cigarette atomizing core according to claim 1, characterized in that: The corrosion-resistant isolation layer (4) is composed of a fluorinated ethylene propylene copolymer film with a thickness of 3-5 μm.

6. The self-healing nanocrystalline leak-proof film for electronic cigarette atomizing core according to claim 1, characterized in that: The thermally conductive adhesive layer (5) is composed of a graphene-organic silicon composite adhesive layer with a thickness of 2-4 μm.

7. The self-healing nanocrystalline leak-proof film for electronic cigarette atomizing core according to claim 1, characterized in that: The surface of the thermally conductive adhesive layer (5) is provided with micro-venting grooves with a spacing of 1-2 mm.

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