阅读说明：本技术 气溶胶递送装置 (Aerosol delivery device ) 是由 李斌 张鸿 吴林 田鑫 于 2019-11-08 设计创作，主要内容包括：本申请公开了一种气溶胶递送装置,包括壳体、气溶胶产生器及控制组件,壳体具有容置部。气溶胶产生器及控制组件设置于容置部中,控制组件电性连接气溶胶产生器。控制组件的外表面上形成聚合物防护涂层,聚合物防护涂层通过原位聚合形成,包括与控制组件接触的聚合物内层和包覆在聚合物内层外表面的聚合物外层,聚合物外层为经原位聚合而成的含氟聚合物层,聚合物内层为经原位聚合而成的不含氟聚合物层,且聚合物内外层彼此交联键接。在聚合物防护涂层的保护下,使用本申请的气溶胶递送装置具有良好的防水、防尘、防湿、抗化学品和抗盐雾腐蚀性能。(An aerosol delivery device includes a housing having a receiving portion, an aerosol generator, and a control assembly. The aerosol generator and the control component are arranged in the accommodating part, and the control component is electrically connected with the aerosol generator. The outer surface of the control component is provided with a polymer protective coating which is formed by in-situ polymerization and comprises a polymer inner layer which is in contact with the control component and a polymer outer layer which is coated on the outer surface of the polymer inner layer, the polymer outer layer is a fluorine-containing polymer layer formed by in-situ polymerization, the polymer inner layer is a fluorine-free polymer layer formed by in-situ polymerization, and the polymer inner layer and the polymer outer layer are mutually cross-linked and bonded. The aerosol delivery devices using the present application have good water, dust, moisture, chemical and salt spray resistance under the protection of a polymeric protective coating.)

1. An aerosol delivery device, comprising:

a housing having a receptacle;

the aerosol generator is arranged in the accommodating part;

the control assembly is electrically connected with the aerosol generator and arranged in the accommodating part, a polymer protective coating is formed on the outer surface of the control assembly and is formed through in-situ polymerization, the polymer protective coating comprises a polymer inner layer which is in contact with the control assembly and a polymer outer layer which is coated on the outer surface of the polymer inner layer, the polymer outer layer is a fluorine-containing polymer layer formed through in-situ polymerization, and the polymer inner layer is a fluorine-free polymer layer formed through in-situ polymerization.

2. The aerosol delivery device of claim 1, wherein the control assembly further comprises a circuit board, a control element, and a power element, the circuit board, the control element, the power element, and the aerosol generator are electrically connected, and the circuit board drives the power element and the aerosol generator to operate according to a control signal output by the control element.

3. The aerosol delivery device of claim 1, further comprising a reservoir removably disposed in the receptacle, the reservoir being coupled to the aerosol generator.

4. The aerosol delivery device of claim 3, wherein the aerosol generator comprises a heating element and an atomizing wick, the heating element being connected with the atomizing wick.

5. The aerosol delivery device of claim 1, wherein the aerosol generator further comprises a heating element disposed in the receptacle, the heating element being in electrical communication with the control assembly, the heating element being a heating rod, a heating sheet, or a heating sleeve.

6. The aerosol delivery device according to any one of claims 1 to 5, wherein the thickness of the outer polymer layer is greater than or equal to the thickness of the inner polymer layer, the thickness of the outer polymer layer is 0.5 to 10 μm, and the thickness of the inner polymer layer is 0.1 to 2 μm.

7. The aerosol delivery device of any of claims 1 to 5, wherein the fluoropolymer layer is a perfluorocarbon organosiloxane polymer layer and the non-fluoropolymer layer comprises one or more of an alkoxysilane polymer layer, an epoxy polymer layer, a polyurethane polymer layer, and an acrylate polymer layer.

8. The aerosol delivery device of any of claims 1-5, wherein the inner polymer layer and/or the outer polymer layer comprises a fluorescer, the fluorescer being an outer-adding fluorescer or an inner-adding fluorescer, the outer-adding fluorescer comprising one or more of a stilbene-type fluorescer, a coumarin-type fluorescer, a pyrazoline-type fluorescer, a benzoxazole-type fluorescer, a bisimide-type fluorescer; the internal addition type fluorescent agent is grafted to the polymer outer layer and/or the polymer inner layer through polymerization reaction, and the internal addition type fluorescent agent is prepared by epoxy group, unsaturated triple bond, unsaturated double bond, organosilicon, -COONH-, -OH, -COOH and-NH₂-one or several of SH are grafted to the outer polymer layer and/or the inner polymer layer.

9. The aerosol delivery device of claim 8, wherein the polymeric inner layer and the polymeric outer layer both contain a fluorescent agent, the fluorescent agent in the polymeric inner layer and the fluorescent agent in the polymeric outer layer being different.

10. The aerosol delivery device according to any one of claims 1 to 5, wherein the inner polymer layer or/and the outer polymer layer comprises a plurality of sub-polymer layers.

11. The aerosol delivery device according to any one of claims 1 to 5, wherein the inner polymer layer and the outer polymer layer are chemically cross-linked together.

12. The aerosol delivery device of any one of claims 1 to 5, wherein the polymeric inner layer contains an adhesive resin selected from the group consisting of silicone resins, epoxy resins, acrylic resins, polyurethane resins, and polyester resins.

13. The aerosol delivery device according to any one of claims 1 to 5, wherein the outer surface and/or the inner surface of the housing further comprises a polymeric protective coating.

Technical Field

The present application relates to the field of aerosol delivery devices formed with a polymeric protective coating, and more particularly to an aerosol delivery device.

Background

At present, the reliability requirement of consumers on electronic products is higher and higher, the requirement on electronic devices of aerosol delivery devices is relatively increased, and the existing aerosol delivery devices (such as electronic cigarette products) generally adopt an open design, namely, an oil storage cavity and an air flow channel are a communication system, so that the liquid leakage problem is generally existed, the smoke oil leaks to an internal PCB (printed circuit board) and a terminal to cause corrosion and influence the function, and the serious situation even causes short circuit or fire. On the other hand, the application scenarios of aerosol delivery devices are also limited due to the limitation of waterproof capability.

Disclosure of Invention

The embodiment of the application provides an aerosol delivery device, which aims to solve the problems that the aerosol delivery device is unexpected due to liquid leakage or the application scene of the aerosol delivery device is limited and the like.

In order to solve the technical problem, the present application is implemented as follows:

an aerosol delivery device is provided that includes a housing having a receptacle, an aerosol generator, and a control assembly. The aerosol generator and the control assembly are arranged in the accommodating part, the control assembly is electrically connected with the aerosol generator, the control assembly comprises a polymer protective coating formed on the outer surface, the polymer protective coating is formed by in-situ polymerization and comprises a polymer inner layer in contact with the control assembly and a polymer outer layer coated on the outer surface of the polymer inner layer, the polymer outer layer is a fluorine-containing polymer layer formed by in-situ polymerization, and the polymer inner layer is a fluorine-free polymer layer formed by in-situ polymerization.

In an embodiment of the present application, a polymeric protective coating is formed on an outer surface of a control component of an aerosol delivery device, and the polymeric protective coating comprises an inner polymeric layer in contact with the control component and an outer polymeric layer coated on an outer surface of the inner polymeric layer, wherein the outer polymeric layer is a fluoropolymer layer and the inner polymeric layer is a non-fluoropolymer layer; in this way, the hydrophobic nature of the fluoropolymer layer as the outer polymer layer, the lack of adhesion to the touch and the resistance to ultraviolet radiation can be exploited to improve the water resistance of the polymeric protective coating or control component, and also to improve the resistance to ultraviolet aging and self-cleaning functions. In addition, the polymer inner layer and the polymer outer layer formed by in-situ polymerization jointly form the polymer protective coating, so that the polymer inner layer and the polymer outer layer can complement each other in structure, a compact protective coating is formed, and the waterproof performance and the salt spray corrosion resistance of the polymer protective coating and the control assembly are further improved. Therefore, the problems that in the prior art, an aerosol delivery device is unexpected due to liquid leakage or the application scene of the aerosol delivery device is limited and the like can be solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic structural diagram of a first embodiment of the present application.

FIG. 2 is an SEM photograph of a cross-section of a sample of the polymeric protective coating.

Fig. 3 is a schematic structural diagram of a second embodiment of the present application.

Fig. 4 is an exploded perspective view of fig. 3.

Fig. 5 is a sectional view taken along line a-a' of fig. 3.

Fig. 6 is a schematic structural diagram of a third embodiment of the present application.

Fig. 7 is an exploded perspective view of fig. 6.

Fig. 8 is a sectional view taken along line B-B' of fig. 6.

FIG. 9 is a graph of an infrared test waveform for a polymeric protective coating.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Fig. 1 is a schematic structural diagram of a first embodiment of the present application. The aerosol delivery device 1 includes a housing 10, an aerosol generator 11 and a control component 12, the housing 10 has a receiving portion 102, the aerosol generator 11 and the control component 12 are disposed in the receiving portion 102, and the control component 12 is electrically connected to the aerosol generator 11. A polymeric protective coating 14 is formed on the outer surface of the control assembly 12. The polymeric protective coating 14 is formed on the outer surface of the control assembly 12 by in situ polymerization. In other words, the polymeric protective coating 14 entirely encapsulates the control assembly 12. The polymeric protective coating 14 includes an inner polymeric layer 142 in contact with the control assembly 12 and an outer polymeric layer 144 coated on an outer surface of the inner polymeric layer 142. The outer polymer layer 144 is a fluoropolymer layer and the inner polymer layer 142 is a non-fluoropolymer layer. It is also noted that throughout the description of the present application, the polymeric protective coating 14 integrally covers the control assembly 12. it is to be understood that the polymeric protective coating 14 forms an outer surface and/or an inner surface of the control assembly 12, and that the polymeric protective coating 14 may form the entire surface of the control assembly 12 or alternatively may form a portion of the surface of the control assembly 12.

According to the first embodiment shown in fig. 1, the fluoropolymer layer has good hydrophobicity, is tack-free to the touch and is resistant to uv radiation, such that the use of the fluoropolymer layer as the outer polymer layer can significantly improve the water resistance of the polymeric protective coating 14 and control component 12, and can also improve the resistance to uv aging and self-cleaning, thereby improving the quality of the aerosol delivery device 1. In addition, the inner polymer layer 142 compensates for the surface roughness of the control assembly 12, thereby allowing the outer polymer layer 144 to form a dense film layer without micro-porosity, and the overall polymeric protective coating 14 forms a dense film layer that enhances its protective properties. In other words, the inner and outer polymeric layers 142, 144 complement and complement each other in structure to increase the compactness of the polymeric protective coating 14, which increases the water and salt spray corrosion resistance of the polymeric protective coating 14 and the aerosol delivery device 1. That is, the polymeric protective coating 14 of the present application can simultaneously have good adhesion to the control assembly 12, water resistance, and salt spray corrosion resistance.

As shown in fig. 2, the inner polymer layer 142 is chemically cross-linked to the outer polymer layer 144. Thus, the polymer inner layer 142 and the polymer outer layer 144 have good interlayer bonding force, and even form a monolithic membrane structure without delamination, thereby further improving the compactness of the polymer protective coating 14.

It should be understood that although the polymeric protective coating 14 is shown in FIG. 1 as having a two-layer structure, i.e., the inner polymeric layer 142 and the outer polymeric layer 144, the polymeric protective coating 14 may have a more layered structure. For example, there may be two, three or more polymeric inner layers 142 (i.e., multiple inner polymeric sublayers), one polymeric outer layer 144; there may also be two, three or more polymeric inner layers 142 (i.e., multiple polymeric inner sublayer layers), two, three or more polymeric outer layers 144 (i.e., multiple polymeric outer sublayer layers); there may also be one inner polymer layer 142 and two, three or more outer polymer layers 144 (i.e., multiple outer polymer layer sublayers). The multi-layer polymeric inner layer 142 has the ability to better compensate for the roughness of the surface of the control assembly 12 and helps to increase the densification of the polymeric protective coating 14. The multi-layer polymeric outer layer 144 may also compensate for roughness of the surface of the control assembly 12 and may further improve the water resistance, uv aging resistance, and self-cleaning ability of the aerosol delivery device 1. Thus, different configurations of the polymeric protective coating 14 can be used to accommodate different aerosol delivery devices 1. Further, the user can select different polymer inner sub-layers 121 and/or polymer outer sub-layers 122 to combine according to the requirements of the polymer protective coating 14, so as to achieve the best synergistic protective effect.

In one embodiment, the fluoropolymer layer is a perfluorocarbon organosiloxane polymer layer and the non-fluoropolymer layer includes one or more of an alkoxysilane polymer layer, an epoxy polymer layer, a polyurethane polymer layer, and an acrylate polymer layer. In a preferred embodiment, the inner polymer layer 142 (i.e., the non-fluoropolymer layer) is an alkoxysilane polymer layer and the outer polymer layer 144 (i.e., the fluoropolymer layer) is a perfluorocarbon organosiloxane polymer layer. Alkoxysilane polymers have good film forming properties, good adhesion to control elements 12 (e.g., control elements of metallic materials), and good water repellency, and are particularly suitable for use as the polymeric inner layer 142. The perfluorocarbon organosiloxane polymer has excellent hydrophobicity, is non-tacky to the touch and is resistant to ultraviolet radiation, and is thus particularly suitable for use as the polymer outer layer 144. The alkoxysilane polymer layer is amphiphilic, has an organic end that is compatible with the outer layer, has a silane end that adheres well to the control element 12 (e.g., the control element is made of metal), and has good hydrophobicity while compensating for the micro roughness of the control element 12, so that the polymer protective coating 14 has excellent water and salt spray corrosion resistance using this combination of materials.

In addition, the polymeric protective coating 14 contains a fluorescent agent. In a specific embodiment, the phosphor is an external additive phosphor or an internal additive phosphor. The external addition type fluorescent agent comprises one or more of a stilbene type fluorescent agent, a coumarin type fluorescent agent, a pyrazoline type fluorescent agent, a benzoxazole type fluorescent agent and a dicarboximide type fluorescent agent. The internal addition type phosphor is prepared by, for example, epoxy group, unsaturated triple bond, unsaturated double bond, silicone, -COONH-, -OH, -COOH, -NH₂-one or several of SH are grafted to the outer polymer layer and/or the inner polymer layer. Specifically, either the polymeric inner layer 142 or the polymeric outer layer 144 contains a phosphor, or both the polymeric outer layer 144 and the polymeric inner layer 142 contain a phosphor. The phosphor in the outer polymer layer 144 and the phosphor in the inner polymer layer 142 may be the same or different, among othersThe same or different fluorescent agents. In some embodiments of the present disclosure, the fluorescer in the outer polymer layer 144 is the same fluorescer as the fluorescer in the inner polymer layer 142, which can provide a significant indication effect for the polymer protective coating 14, so as to detect the status of the polymer protective coating 14 at any time and maintain the status in time. In some embodiments of the present application, the phosphor in the outer polymer layer 144 is different from the phosphor in the inner polymer layer 142, and may indicate fluorescence of different light colors under ultraviolet light, for example, so that the respective states of the outer polymer layer 144 and the inner polymer layer 142 can be clearly understood, and thus maintenance can be performed on different layers.

In one embodiment, the polymeric inner layer 142 contains a binder resin. Preferably, the adhesive resin is selected from the group consisting of silicone resin, epoxy resin, acrylic resin, polyurethane resin, and polyester resin. Wherein the bonding resin adheres well to the control component 12, thereby helping to further improve the adhesion of the polymeric protective coating 14 to the control component 12 and reducing the risk of the coating peeling off.

As also shown in fig. 1, the outer polymeric layer 144 has a thickness equal to or greater than the thickness of the inner polymeric layer 142. For example, the ratio of the thickness of the outer polymer layer 144 to the inner polymer layer 142 can be between 1 (0.1-1), specifically 1:0.1, 1:0.3, 1:0.4, 1:0.8, and the like. The thickness of the polymeric protective coating 14 cannot be too thick, typically in order not to affect the heat dissipation of the control assembly 12, and in some flexible circuit boards and locations where folding is desired, a flexible polymeric protective coating 14 is typically desired. Therefore, the inner polymer layer 142 with a smaller inner thickness is selected to reduce the total thickness of the inner polymer protective coating 14, so as to form a flexible inner polymer protective coating 14 with flexibility and good protection for some parts requiring high light transmission, and to compensate for the small roughness of the control assembly 12, so as to facilitate the formation of a dense outer polymer layer on the inner polymer layer 142, so that the inner polymer layer 142 and the outer polymer layer 144 can compensate for each other well to form a dense inner polymer protective coating 14. In a preferred embodiment, the outer polymeric layer 144 has a thickness of 0.5 to 10 μm and the inner polymeric layer 142 has a thickness of 0.1 to 2 μm. This combination of the outer polymeric layer 144 and the inner polymeric layer 142 not only enables the formation of a dense polymeric protective coating 14, but does not significantly increase the thickness of the polymeric protective coating 14, which helps to increase the heat dissipation properties of the aerosol delivery device 1.

The method of making how the polymeric protective coating 14 is formed on the control assembly 12 in the aerosol delivery device 1 is further illustrated by the specific example. First, a first precursor dispersion liquid containing a first active organic precursor and a second precursor dispersion liquid containing a second active organic precursor are prepared, the first active organic precursor being a fluorine-free monomer and the second active organic precursor being a fluorine-containing monomer. The first precursor dispersion liquid is prepared by dispersing alkoxy silane, organic silicon resin, a stilbene fluorescent agent, an alkyl titanium catalyst and an isocyanate curing agent into a hydrofluoroether solvent. In the first precursor dispersion, the content of alkoxysilane, the content of binder resin, the content of fluorescent agent, the content of catalyst, and the content of isocyanate-based curing agent were 24.3%, 1.4%, 0.08%, 0.05%, 4.2%, and the balance hydrofluoroether solvent and inevitable impurities, by weight. The second precursor dispersion is prepared by dispersing a perfluorocarbon organosiloxane, a stilbene-type fluorescent agent, an alkyltitanium catalyst, and an isocyanate-type curing agent in a hydrofluoroether solvent. In the second precursor dispersion, the content of perfluorocarbon organosiloxane, the content of catalyst, the content of fluorescent agent, and the content of isocyanate-based curing agent were 22.8%, 0.8%, 0.1%, 3.2%, and the balance hydrofluoroether solvent and inevitable impurities, by weight. In a preferred embodiment, the first reactive organic precursor is an alkoxysilane and the second reactive organic precursor is a perfluorocarbon organosiloxane, both of which have good film forming properties and are capable of chemically crosslinking well upon polymerization, thereby facilitating the formation of a good protective coating on the control assembly 12, as will be described in more detail below.

In the present embodiment, the adhesive resin is a silicone resin, but the present application is not limited thereto. In other embodiments, the adhesive resin may be selected from the group consisting of silicone resin, epoxy resin, acrylic resin, polyurethane resin, and polyester resin. That is, the adhesive resin may be one or more of a silicone resin, an epoxy resin, an acrylic resin, a polyurethane resin, and a polyester resin. The catalyst is a titanium alkyl catalyst, however, the present application is not limited thereto. In other embodiments, the catalyst is selected from the group consisting of a titanium alkyl based catalyst, an aluminum alkyl based catalyst, and a tin alkyl based catalyst. That is, the catalyst may be one or more of a titanium alkyl-based catalyst, an aluminum alkyl-based catalyst, and a tin alkyl-based catalyst.

Knowing the above ingredients, in practice, the surface of the control element 12 is pre-treated before applying the first precursor dispersion to the control element 12. The pre-treatment includes one or more of plasma treatment, electrical discharge treatment, sand blasting, polishing, flame treatment, and primer treatment, so that the first precursor dispersion can be better attached to the control assembly 12. Spraying the first precursor dispersion on the control member 12, and then drying at 20 ℃ for 1 minute to remove the hydrofluoroether solvent, thereby forming a first dried layer; the second precursor dispersion was spray-coated on the first dried layer, followed by drying at 20 ℃ for 1 minute and then drying at 80 ℃ for 2 minutes to remove the hydrofluoroether solvent, thereby forming a second dried layer covering the first dried layer. Note that the amount of application of the second precursor dispersion is larger than that of the first precursor dispersion, so that the thickness of the second dry layer is larger than that of the first dry layer. The dispersion liquid is formed on the surface of the control component 12 in a spraying mode, so that the controllability is excellent; for example, if a high-precision spray valve or a large-area atomizing spray valve or a water curtain spray valve is used, the whole surface of the large-area control assembly 12 can be protected. On the other hand, selective shielding of local positions is also possible, and even fixed-point positioning shielding may be possible for a particular position of the control assembly 12. However, the present application is not limited thereto, and in other embodiments, the dispersion liquid may be formed on the surface of the control component 12 by dispensing, brushing, dipping, or spraying. The control assembly 12 with the second and first dry layers was then placed in a polymerization reaction at 23 ℃ and 50% humidity for 24 hours to yield a final sample 111 of the aerosol delivery device 1. The first dried layer is converted to an inner polymer layer 142 and the second dried layer is converted to an outer polymer layer 144. It is also noted that in the above description, the first and second desiccant layers are formed in situ polymerization within the control assembly 12 to form the inner and outer polymer layers 142, 144. The initiation conditions for forming the polymer protective coating 14 may be moisture curing, heat curing, UV curing, or electron beam curing, but the present application is not limited thereto. And coating and applying a second precursor dispersion liquid on the first dry layer, and drying to form a second dry layer, so that the first active organic matter precursor and the second active organic matter precursor are polymerized to obtain the control assembly 12 with the polymer protective coating 14.

Of course, the conditions of the polymerization preparation may be adjusted as appropriate, for example, in the step of drying to form the first dried layer, drying is carried out at room temperature, which means a temperature between 20 ℃ and 25 ℃, for 1 to 10 minutes; in the step of drying to form the second dry layer, the first drying step is carried out at room temperature for 1-10 minutes, and then the second drying step is carried out at 70-90 ℃ for 1-10 minutes, wherein the drying temperature is 80 ℃ in a specific example; in the step of completing the polymerization, the polymerization reaction is carried out at 20 to 30 ℃ and 50% humidity, and in a specific example, the polymerization temperature is 23 ℃, and the drying conditions in the step of drying to form the first dried layer are such that the solvent in the first precursor dispersion is completely volatilized and the first reactive organic precursor is prevented from being polymerized in advance. The pre-drying in the step of drying to form the second dry layer can promote the solvent to volatilize so as to initially form the thicker second dry layer, and the drying at 80 ℃ for 1-10 minutes further promotes the solvent to volatilize rapidly and avoids the second active organic precursor from polymerizing in advance, so that the thicker second dry layer can be formed and the second active organic precursor from polymerizing in advance through the two-step drying in the step of drying to form the second dry layer. Under the polymerization condition of the step of completing polymerization, the first active organic precursor and the second active organic precursor undergo a polymerization reaction to a great extent, so that not only the inner polymer layer 142 and the outer polymer layer 144 can be formed by respective polymerization, but also chemical crosslinking can occur at the interface of the two layers, so that the inner polymer layer 142 and the outer polymer layer 144 form a whole to ensure the compactness of the protective polymer coating 14, and further ensure the waterproof performance and the salt spray corrosion resistance of the protective polymer coating 14 and the control assembly 12.

Fig. 2 is an SEM photograph of a cross-section of a sample of the polymer protective coating, in this example, an SEM photograph of sample 111 is illustrated. The inner polymer layer 142 is intimately bonded to the outer polymer layer 144 to form the densified polymer protective coating 14. Specifically, there is no other delamination between the polymer inner layer 142 and the polymer outer layer 144, and the same layer is a uniformly polymerized integral thin film structure, which has no pin hole and no defect.

The thickness of the inner polymer layer 142 and the outer polymer layer 144 of the sample 111 were tested, and the static Water Contact Angle (WCA) of the polymeric protective coating 14 was tested (test environment: 25 ℃/50%), and adhesion was tested according to GBT 9286-1998; according to the national standard of GB6458-86 salt spray test, salt spray corrosion resistance performance test is carried out in 5 percent (mass) NaCl solution (pH value: 6.5-7.2) at 35 +/-1 ℃; carrying out bending resistance test; and carrying out a light transmittance test according to the GB-T2410-2008 standard.

For the salt spray corrosion resistance test, when 0% of the area of a sample to be tested has a rusting phenomenon, the salt spray corrosion resistance grade of the sample is defined as 0 grade; when the area of the sample to be detected is rusted at the rate of less than 1%, defining the salt spray corrosion resistance grade of the sample as grade 1; when the area of the sample to be detected is less than 5 percent of the area of the sample to be detected, the salt spray corrosion resistance grade of the sample is defined as 2 grade; when the area of the sample to be detected is less than 10 percent of the area of the sample to be detected, the salt spray corrosion resistance grade of the sample is defined as 3 grade; when the area of the sample to be detected is less than 20 percent of the area of the sample to be detected, the salt spray corrosion resistance grade of the sample is defined as 4 grade; when the area of the sample to be tested is equal to or larger than 20 percent of the area of the sample to be tested, the salt spray corrosion resistance grade of the sample is defined as 5 grade.

The bending resistance test was performed according to the following method: and (4) sequentially gluing on the PI film, bending at an angle of 180 degrees once after the PI film is completely cured, and judging. Level 0: with no or only slight creases. Level 1: has a plurality of cracks and the coating does not peel off. And 2, stage: there were multiple cracks and the coating had flaking off. And 3, level: the coating is broken and peeled off.

The above experiments and tests were repeated with different materials, wherein the composition of the ingredients of the different examples is shown in table 1 and the test results are shown in table 2.

It should be noted that in preparing the test piece 333, two kinds of first precursor dispersions (shown in table 1) were used to form the polymer inner layer 142, and one kind of second precursor dispersion (shown in table 1) was used to form the polymer inner layer 142. Thus, the polymer inner layer 142 has two sublayers; the outer polymer layer 144 is one layer.

In preparing sample 444, one first precursor dispersion (shown in table 1) was used to form polymer inner layer 142, and two second precursor dispersions (shown in table 1) were used to form polymer inner layer 142. Thus, the polymer inner layer 142 is one layer; the polymeric outer layer 144 has two sublayers.

In preparing sample 555, two first precursor dispersions (as shown in table 1) were used to form polymer inner layer 142, and two second precursor dispersions (as shown in table 1) were used to form polymer inner layer 142. Thus, the polymer inner layer 142 has two sublayers; the polymeric outer layer 144 also has two sublayers.

Comparative example 1

The polymeric protective coating 14 was prepared on the control assembly 12 using prior art methods to form the sample 666.

The thickness of the polymeric protective coating 14 of the sample 666 was tested, the static Water Contact Angle (WCA) of the polymeric protective coating 14 was tested (test environment: 25 ℃/50%), the adhesion was tested according to GBT9286-1998, and the salt spray corrosion resistance was tested according to GB 6458-86-salt spray national standard at 35 + -1 ℃, 5% (by mass) NaCl solution (pH: 6.5-7.2), the bending resistance was tested, and the light transmittance was tested according to GB-T2410-2008. The test results are shown in table 2.

TABLE 1

WCA/°

Adhesion force

Salt spray corrosion for 96 hours

Bending resistance

Transmittance (a)

Sample 111

125

Level 0

Level 0

Stage 2

90

Sample 222

118

Level 0

Level 0

Level 1

94

Test specimen333

120

Level 0

Level 0

Level 0

91

Sample 444

124

Level 0

Level 0

Grade 3

95

Sample 555

122

Level 0

Level 0

Level 1

89

Sample 666

110

Stage 2

4 stage

Grade

3

92

TABLE 2

As can be seen from table 2, the thickness of the polymeric protective coating 14 of samples 111 and 222 differs less from the thickness of the polymeric protective coating 14 of sample 666, but samples 111 and 222 are more resistant to salt spray than sample 666. In addition, the static Water Contact Angle (WCA) of samples 111, 222, 333, 444, 555 was greater than the static Water Contact Angle (WCA) of sample 666, indicating that samples 111, 222, 333, 444, 555 were more water repellant. The control assembly 12 prepared according to the method of the present application also has good water resistance and salt spray corrosion resistance. At the same time, the polymeric protective coating 14 of the present application can maintain a transmittance of at least 89% while having excellent water and salt spray corrosion resistance.

Please refer to fig. 3, fig. 4 and fig. 5, which are schematic structural diagrams of a second embodiment of the present application; FIG. 4 is an exploded perspective view of FIG. 3; fig. 5 is a sectional view taken along line a-a' of fig. 3. The aerosol delivery device 2 includes a housing 10, an aerosol generator 11, and a control assembly 12, the housing 10 having a receptacle 102, the aerosol generator 11 and the control assembly 12 being disposed in the receptacle 102. The aerosol delivery device 2 further includes a reservoir 222 and a mouthpiece 224, the reservoir 222 containing a liquid, which may be an aerosol-generating liquid such as electronic tobacco tar, medicated oil, etc., the reservoir 222 being disposed in the receiving portion 102 of the housing 20 and connected to the aerosol generator 11. The suction nozzle 224 is disposed on the housing 10 and corresponds to the liquid reservoir 222. The aerosol generator 11, i.e. an atomizer, comprises a heating element 112 and an atomizing wick 114. The heating element 112 is connected to the atomizing core 114, and in this embodiment, the atomizing core 114 is disposed on the heating element 112. The heating element 112 is, for example and without limitation, a heating wire to heat the liquid within the atomized liquid reservoir 222. The atomizing wick 114 is, for example and without limitation, a cotton wick to draw liquid (hereinafter exemplified by E-liquid) from the reservoir 222. The control assembly 12 includes a circuit board 122, a control element 124, and a power element 126, wherein the circuit board 122, the control element 124, the power element 126, and the aerosol generator 11 are electrically connected, and the circuit board 122 drives the power element 126 and the aerosol generator 11 to operate according to a control signal output by the control element 124. A filter cotton 128 and a tube 127 are disposed between the liquid storage container 222 and the aerosol generator 11, the liquid storage container 222 is communicated to the atomizing core 114 through the tube 127, after the liquid in the liquid storage container 222, such as the electronic cigarette liquid, is absorbed by the atomizing core 114, the heating element 112 performs heating atomization, the atomized electronic cigarette liquid passes through the tube 127 and is filtered by the filter cotton 128, and then the filtered electronic cigarette liquid is sucked out from the suction nozzle 224, the filter cotton 128 is used to prevent the condensed electronic cigarette liquid from being sucked into the mouth through the suction nozzle 224, the filter cotton 128 is made of a material that only the completely atomized electronic cigarette liquid can pass through, and the condensed small water droplet-shaped electronic cigarette liquid cannot pass through. As shown in fig. 5, the polymer protective coating 14 is formed on the outer surface of the control component 12, and the polymer protective coating 14 is formed by in-situ polymerization and includes a polymer inner layer 142 contacting with the control component 12 and a polymer outer layer 144 covering the outer surface of the polymer inner layer 142, where the polymer outer layer 144 is a fluoropolymer layer formed by in-situ polymerization, and the polymer inner layer 142 is a non-fluoropolymer layer formed by in-situ polymerization. It is also noted that the polymeric protective coating 14 entirely covers the control component 12, but the polymeric protective coating 14 may form the entire surface of the control component 12 or alternatively form a portion of the surface of the control component 12, and in the preferred embodiment, the mouthpiece 224 is not formed with the polymeric protective coating 14; in other words, the polymer protective coating 14 integrally covers the circuit board 122, the control element 124 and the power supply element 126, and the aerosol delivery device 2 has good water resistance and salt-fog corrosion resistance under the protection of the polymer protective coating 14. The polymeric protective coating 14 in the second embodiment is formed on the outer surface of the control assembly 12 in the same manner as in the first embodiment, and therefore, the description thereof is omitted. The circuit board 122 operates according to the control signal outputted from the control device 124, and the power device 126 provides power to the circuit board 122, the control device 124, and the aerosol generator 11. The reservoir 222 is removable from the housing 10 by a user to fill the reservoir 222 with aerosol-generating liquid, and the user draws aerosol generated by the aerosol generator 11 through the mouthpiece 224.

Please refer to fig. 6, fig. 7 and fig. 8, wherein fig. 6 is a schematic structural diagram of a third embodiment of the present application; FIG. 7 is an exploded perspective view of FIG. 6; fig. 8 is a sectional view taken along line B-B' of fig. 6. The aerosol delivery device 3 includes a housing 10, an aerosol generator 11, and a control assembly 12, the housing 10 having a receptacle 102, the aerosol generator 11 and the control assembly 12 being disposed in the receptacle 102. The aerosol generator 11 further comprises a heating element 32, the heating element 32 is connected with the control assembly 12, the control assembly 12 comprises a circuit board 122, a control element 124 and a power element 126, and the circuit board 122, the control element 124, the power element 126 and the aerosol generator 11 are electrically connected. In the embodiment, the heating element 32 is a heating rod (or heating pin), and the heating element 32 is used for inserting a cigarette to heat the cigarette. As shown in fig. 8, the polymer protective coating 14 is formed on the outer surface of the control component 12, and the polymer protective coating 14 is formed by in-situ polymerization and includes a polymer inner layer 142 contacting with the control component 12 and a polymer outer layer 144 covering the outer surface of the polymer inner layer 142, where the polymer outer layer 144 is a fluoropolymer layer formed by in-situ polymerization, and the polymer inner layer 142 is a non-fluoropolymer layer formed by in-situ polymerization. It is also noted that the polymeric protective coating 14 entirely surrounds the control assembly 12, but the polymeric protective coating 14 may form the entire surface of the control assembly 12 or alternatively may form a portion of the surface of the control assembly 12, and in the preferred embodiment, the heating element 32 is not formed with the polymeric protective coating 14; in other words, the polymer protective coating 14 entirely covers the circuit board 122, the control element 124 and the power supply element 126, and the aerosol delivery device 3 has good water resistance and salt-fog corrosion resistance under the protection of the polymer protective coating 14. The polymeric protective coating 14 in the third embodiment is formed on the outer surface of the control assembly 12 in the same manner as in the first embodiment, and therefore, the description thereof is omitted. The circuit board 122 operates according to the control signal output by the control component 124, and the power component 126 provides power to the circuit board 122 and the control component 124. In actual operation, the circuit board 122 drives the power supply device 126 and the aerosol generator 11 to operate according to the control signal output by the control device 124. In detail, the heating element 32 is actually a heating rod, and the circuit board 122 drives the power element 126 to provide power, and simultaneously drives the aerosol generator 11 to heat the heating rod, so that the cigarette cartridge mounted on the heating rod can be heated for the user to suck. In the above description, the heating element 32 is illustrated as a heating rod, but the application is not limited thereto, and in other embodiments, the heating element 32 may also be a heating plate or a heating sleeve.

As shown in table 3, the nano-plating increased the surface roughness. When a portable roughness detector is used for measuring the surface roughness of the control assembly 12, a sensor is placed on the measured surface of the control assembly 12, a driving mechanism in the instrument drives the sensor to slide along the measured surface at a constant speed, the sensor senses the roughness of the measured surface through a built-in sharp contact pin, the roughness of the measured surface of the control assembly 12 causes the contact pin to generate displacement, the displacement enables the inductance of an inductance coil of the sensor to change, so that an analog signal which is in a row with the roughness of the measured surface is generated at the output end of a phase-sensitive rectifier, the signal enters a data acquisition system after being amplified and subjected to level conversion, a DSP chip performs digital filtering and parameter calculation on acquired data, and the arithmetic mean deviation Ra of the roughness profile of the measured surface is measured. Vickers hardness of the samples measured using vickers hardometer is shown in table 3 below:

TABLE 3

As shown in FIG. 9, the outer polymer layer 144 is an in-situ polymerized fluoropolymer layer, and has a characteristic peak of fluorine content of the nano-coating (about 50nm thick) represented by infrared energy at a wave number of 1800cm^-1New absorption peaks appear around.

As shown in table 4, the plating increased the surface contact resistance by about 2%. The three-point method is adopted to test the surface contact resistance value of the metal terminal with or without the coating, and the results are as follows:

TABLE 4

According to the wear resistance test data of the coating, the wear resistance performance is about 3000 times at the thickness of 40 nm. In detail, the testing method is to fix the coated substrate material on the testing platform, that is, fix the control assembly 12 of the present application on the testing platform; adjusting the friction cycle times, the rotating speed and the load; the contact angle of the film surface before and after rubbing was then tested. According to the judgment results shown in Table 5, the water drop angle was 115 ° ± 5 ° before rubbing, and the sample was tested at 6 points; 3 points in the test stroke, and the water drop angle after friction is not less than 100 degrees; the film falling phenomenon does not appear on the appearance; the passing rate of the test result of the sample reaches 100 percent.

TABLE 5

In some preferred embodiments, circuit board 122 is immersed in a 3.6% alkaline solution, such as a sea salt solution, which can withstand a voltage of 30 volts (V), and the leakage current is within the standard specification, and all test items pass, as shown in table 6.

TABLE 6

As described above, the control components of the aerosol delivery devices 1, 2, and 3 of the present application respectively have the polymer protective coating 14, so that the aerosol delivery devices 1, 2, and 3 of the present application have a better waterproof effect, and can avoid accidents caused by liquid leakage, and have excellent operation experience even in a humid environment, so that the problems of accidents caused by liquid leakage or limited application scenarios of the aerosol delivery devices can be avoided. In addition, in other embodiments of the present application, the outer surface and/or the inner surface of the housing of the aerosol delivery device 1, 2, 3 may be further provided with a polymer protective coating 14, so as to further improve the reliability, water resistance, and other performances of the aerosol delivery device 1, 2, 3.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.