Laser heating atomization assembly and preparation method thereof, aerosol generation product and aerosol generation system

Abstract

The invention belongs to the technical field of atomization, and particularly relates to a laser heating atomization assembly, a preparation method of the laser heating atomization assembly, an aerosol generation product and an aerosol generation system. The laser heating atomization assembly provided by the invention comprises a light absorption coating, a textured substrate and an atomization medium layer which are arranged in sequence, by limiting the component A and the component B in the light absorption coating and selecting the textured substrate, the high infrared spectrum absorptivity of the light absorption coating is larger than or equal to 90%, and the coating does not fall off at the local high temperature of about 600 DEG C.

Description

Technical Field

[0001] The present invention belongs to the technical field of atomization, and in particular relates to a laser heating atomization component and a preparation method thereof, an aerosol generating product and an aerosol generating system. Background Art

[0002] As we all know, smoking can cause a variety of diseases, including respiratory diseases, malignant tumors, cardiovascular and cerebrovascular diseases, diabetes, etc.; smoking also brings serious secondhand smoke. Survey data show that the secondhand smoke exposure rate of non-smokers is as high as 68.1%. Secondhand smoke also contains a large amount of harmful substances and carcinogens. Non-smokers exposed to secondhand smoke will also increase the incidence of smoking-related diseases.

[0003] Heat Not Burning products, also known as low-temperature cigarettes, are a new type of tobacco product that combines smoking utensils and cigarette cartridges. It is a "low-temperature cigarette" designed with the idea of ​​"heating without burning". It uses a special heating device (smoking utensils) to heat the processed tobacco (special cigarette cartridges) to a certain temperature, so that the tobacco is heated to a degree sufficient to emit smoke for people to smoke. Due to its portability, ease of use, no open flames, and no ash, it has become the mainstream of the market. At present, there are three types of electric heating methods for heat-not-burn products: center heating: high heat utilization rate and good insulation effect; ring heating: large heating area and high heat transfer efficiency; composite heating: relatively uniform heating effect and high heat transfer area, which can effectively reduce the heating temperature and improve the insulation performance and endurance of smoking utensils. However, no matter which heating method is used, it takes a long time to preheat and wait. Users generally need to wait for about 30 seconds before they can start the smoking experience, and they cannot achieve the experience of stopping immediately after smoking.

[0004] In order to solve the above technical problems, the prior art provides an atomizer including a photothermal conversion coating. However, the photothermal conversion coating in the prior art has a low spectrum utilization rate, generally below 90%. In addition, due to local high temperatures generated during the heating process, the surface temperature of the coating can reach up to 600°C. The high temperature will cause the coating to fall off, affecting its service life. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the above-mentioned defects existing in the atomization process of the aerosol generating system in the prior art, thereby providing a laser heating atomization component and a preparation method thereof, an aerosol generating product and an aerosol generating system.

[0006] To this end, the present invention provides the following technical solutions:

[0007] A laser heating atomization component comprises a light absorbing coating, a roughened substrate and an atomized medium layer which are arranged in sequence;

[0008] The raw materials of the light-absorbing coating include component A and component B.

[0009] The component A comprises the following components in percentage by weight: 30-60% organic solvent; 30-60% inorganic filler; 2-10% siloxane monomer A; 1-10% pigment; 2-6% auxiliary agent;

[0010] The B component comprises the following components in percentage by mass: 40-98% of an organic solvent; 1-4% of a binder; and 1-10% of a siloxane monomer B.

[0011] Optionally, the light absorbing coating has a thickness of 5-30 μm;

[0012] And / or, the mass ratio of component A to component B is (1-5):1.

[0013] Optionally, the textured substrate has a thickness of 5-50 μm;

[0014] And / or, the textured substrate has Ra≥0.2um, Rz≥1um; optionally, the textured substrate has Ra 0.2-3um, Rz 1-6um;

[0015] And / or, the textured substrate is made of aluminum foil or copper foil.

[0016] Optionally, the textured substrate has micro-through holes, and the diameter of the micro-through holes is 5-50 μm. The selection of the textured substrate with micro-through holes enables the light-absorbing coating slurry to penetrate into the micro-holes, providing better adhesion.

[0017] Optionally, in component A:

[0018] The organic solvent comprises at least one of methanol, ethanol, methyl acetate, ethyl acetate, formic acid, isopropanol, propyl pyruvate, propionaldehyde, and acetaldehyde;

[0019] And / or, the inorganic filler includes at least one of aluminum oxide, manganese oxide, silicon oxide, graphene, and diatomaceous earth;

[0020] And / or, the siloxane monomer A includes at least one of methoxytrimethylsilane, trimethylsilanol, hexamethyldisiloxane, and trimethylethoxysilane;

[0021] And / or, the pigment includes at least one of manganese oxide, silicon oxide, and chromium oxide;

[0022] And / or, the auxiliary agent includes polyethylene glycol.

[0023] Optionally, in component B:

[0024] The binder includes at least one of polydimethylsiloxane, hexamethylenetetramine, and butyl methacrylate;

[0025] And / or, the siloxane monomer B includes at least one of methyltrimethoxysilane and dimethyldimethoxysilane;

[0026] And / or, the organic solvent in component B includes at least one of isopropanol and ethanol.

[0027] Optionally, the thickness of the atomized medium layer is 0.1-0.5 mm;

[0028] And / or, the atomizing medium layer is composed of tobacco powder;

[0029] And / or, the raw materials of the atomizing medium layer include the following components in percentage by mass: 50-90% tobacco powder; 10-50% polyhydroxy alcohol;

[0030] Optionally, the polyhydric alcohol includes at least one of propylene glycol and glycerol.

[0031] The present invention also provides a method for preparing the above-mentioned laser heating atomization component, comprising the following steps:

[0032] S1, taking a substrate material and performing a texturing treatment to obtain a texturized substrate;

[0033] S2, preparing slurries of component A and component B respectively, mixing the two in proportion, applying them to one side surface of the textured substrate, and curing;

[0034] S3, preparing an atomized medium slurry, applying it to the other side surface of the textured substrate, and drying it.

[0035] Optionally, the method for preparing the laser heating atomization assembly satisfies at least one of the following (1)-(5):

[0036] (1) In step S1, roughening treatment is performed by at least one of laser treatment, electrolytic corrosion or sandblasting;

[0037] (2) In step S2, the curing temperature is 200-500° C. and the curing time is 30-180 min;

[0038] (3) In step S2, the coating method is spraying, printing or scraping;

[0039] (4) In step S3, the coating method is a thick slurry method, a roller pressing method or a spraying method;

[0040] (5) In step S3, the drying temperature is 70-90°C.

[0041] The present invention also provides an aerosol generating product, comprising the above-mentioned laser heating atomization component or the laser heating atomization component prepared by the above-mentioned preparation method. The aerosol generating product can be in any shape such as a sheet, a cylinder, a prism, etc., which is not limited here. In one example, the aerosol generating product is cylindrical, and the aerosol generating product can also include one or more of a filtering section, a supporting section, and a cooling section, which is not limited here.

[0042] The present invention also provides an aerosol generating system, comprising the above-mentioned aerosol generating product and a laser heating device, wherein the laser heating device can utilize laser to heat the aerosol generating product.

[0043] In the present invention, Ra represents roughness, and Rz represents the maximum value of surface height difference.

[0044] In the present invention, the surface roughness and the aperture of the micro-through hole can be regulated by controlling the parameters of the texturing treatment.

[0045] The technical solution of the present invention has the following advantages:

[0046] The laser heating atomization component provided by the present invention comprises a light-absorbing coating, a textured substrate and an atomized medium layer which are arranged in sequence; by limiting the components A and B in the light-absorbing coating and selecting the textured substrate, the high infrared spectrum absorption rate of the light-absorbing coating is made ≥90%, the coating does not fall off at a local high temperature of about 600°C, and better adhesion is provided.

[0047] In addition, after high-temperature curing or drying, most of the solvents and additives in the light-absorbing coating components evaporate and condense, and the remaining metal oxides and silicone ceramic components will not produce odor and harmful gases when heated at high temperatures during subsequent use, meeting food grade requirements. At the same time, the A component and the B component are set separately, which can extend the service life and validity period.

[0048] The laser heating atomization component provided by the present invention can meet the requirements of not exposing the bottom of the substrate material and ensuring the consistency of the appearance effect of the dark coating by limiting the thickness of the light-absorbing coating.

[0049] The laser heating atomization component provided by the present invention can improve the hydrophobicity, flexibility and glossiness of the atomization component by limiting the siloxane monomers.

[0050] The preparation method of the laser heating atomization component provided by the present invention can form a dense organic silicon ceramic coating through high temperature curing, further improve the high temperature resistance effect, and avoid falling off at high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0052] Figure 1 is a schematic structural diagram of a laser heating atomization assembly in Embodiment 1 of the present invention;

[0053] Figure 2 is a schematic structural diagram of a laser heating atomization assembly in Example 6 of the present invention;

[0054] Reference numerals:

[0055] 1. Light-absorbing coating; 2. Roughened substrate; 3. Atomized dielectric layer; 4. Micro through-holes. DETAILED DESCRIPTION

[0056] The following examples are provided for a better understanding of the present invention, but are not intended to limit the best mode of implementation, nor to limit the content and protection scope of the present invention. Any product identical or similar to the present invention obtained by anyone under the inspiration of the present invention or by combining the features of the present invention with other prior arts shall fall within the protection scope of the present invention.

[0057] If no specific experimental steps or conditions are specified in the examples, the conventional experimental steps or conditions described in the literature in the field can be used. If no manufacturer is specified for the reagents or instruments used, they are all conventional reagent products that can be obtained commercially.

[0058] Example 1

[0059] This embodiment provides a laser heating atomization component, and its structural schematic diagram is as follows: Figure 1 As shown, it includes a light-absorbing coating 1, a textured substrate 2 and an atomized medium layer 3 which are arranged in sequence.

[0060] The preparation method of the laser heating atomization component comprises the following steps:

[0061] S1, substrate texturing

[0062] Take an aluminum foil with a thickness of 12 μm and use a laser method to perform a roughening process to obtain a roughened substrate with Ra 0.20 um and Rz 1.5 um.

[0063] S2, Preparation of light-absorbing coating

[0064] The raw materials of component A and component B are weighed in proportion, the specific composition is shown in the table below, and mixed to obtain component A and component B slurries respectively. The two are mixed and stirred at a mass ratio of 2:1 for 2 hours, and fully matured to obtain a light-absorbing coating slurry.

[0065] Table 1

[0066]

[0067] Wherein, “ / ” represents that the component is not contained.

[0068] Lay the textured substrate (textured aluminum foil) flat on a horizontal vacuum adsorption platform, keep the surface flat, and wipe the surface with a dust-free cloth dipped in alcohol; pour the light-absorbing coating slurry into a spray gun and spray it evenly on the aluminum foil. The spray gun has a diameter of 1.0 mm. Let it stand for about 30 minutes. After the surface is dry, transfer the aluminum foil to a 250℃ high-temperature oven for curing for 30 minutes to obtain a light-absorbing coating with a thickness of 6μm.

[0069] S3, Preparation of atomized medium layer

[0070] 70% tobacco powder (produced in Kunming tobacco, the same below) and 30% propylene glycol (PG) & glycerol (VG) (the mass ratio of the two is 7:3) are mixed and stirred to form a thick slurry, and the medium is evenly coated on the side of the aluminum foil without a light-absorbing coating by a casting method; after the above semi-finished products are surface-dried, they are transferred to an oven for drying at about 80°C to obtain an atomized medium layer with a thickness of 0.30 mm.

[0071] Example 2

[0072] This embodiment provides a laser heating atomization component. Compared with Embodiment 1, the difference lies in that the raw materials of component A and component B are selected differently, as shown in the table below.

[0073] Table 2

[0074]

[0075] Example 3

[0076] This embodiment provides a laser heating atomization component. Compared with Embodiment 1, the difference lies in that the raw materials of component A and component B are selected differently, as shown in the table below.

[0077] Table 3

[0078]

[0079] Example 4

[0080] This embodiment provides a laser heating atomization component. Compared with Embodiment 1, the difference is that the ratios of the raw materials in component A and component B are different, as shown in the table below.

[0081] Table 4

[0082]

[0083]

[0084] Example 5

[0085] This embodiment provides a laser heating atomization component. Compared with Embodiment 1, the difference is that the ratios of the raw materials in component A and component B are different, as shown in the table below.

[0086] Table 5

[0087]

[0088] Example 6

[0089] This embodiment provides a laser heating atomization component, and its structural schematic diagram is as follows: Figure 2 As shown, it includes a light absorbing coating 1, a textured substrate 2, an atomized medium layer 3 and micro-through holes 4 arranged in sequence. Compared with Example 1, the difference lies in that the textured treatment steps of the substrate are different, which are as follows:

[0090] Take an aluminum foil with a thickness of 14 μm and perform a roughening treatment by electrolytic etching to obtain a roughened substrate with a micro through hole diameter of 20 μm, Ra0.25 um, and Rz 2 um.

[0091] Example 7

[0092] This embodiment provides a laser heating atomization assembly. Compared with the embodiment 6, the difference lies in the different steps of the roughening treatment of the substrate, which are as follows:

[0093] Take an aluminum foil with a thickness of 16 μm and perform a texturing treatment by electrolytic etching to obtain a texturing substrate with a micro through hole diameter of 30 μm, Ra0.30 um, and Rz 6 um.

[0094] Example 8

[0095] This embodiment provides a laser heating atomization component. Compared with Embodiment 1, the difference is that the thickness of the light absorbing coating is controlled to be 5 μm.

[0096] Example 9

[0097] This embodiment provides a laser heating atomization component. Compared with Embodiment 1, the difference is that the thickness of the light absorbing coating is controlled to be 20 μm.

[0098] Example 10

[0099] This embodiment provides a laser heating atomization component. Compared with Embodiment 1, the difference is that the mass ratio of component A to component B is 3:1.

[0100] Comparative Example 1

[0101] This comparative example provides a laser heating atomization component, which is different from Example 1 in that the aluminum foil is not roughened.

[0102] Comparative Example 2

[0103] This comparative example provides a laser heating atomization component. Compared with Example 1, the difference is that the composition of the light-absorbing coating is different, as shown in the table below.

[0104] Table 6

[0105]

[0106] Test Case

[0107] 1. The laser heating atomization components obtained in each embodiment and comparative example were rolled into the same aerosol-generating product shape (hollow cylindrical, with a diameter of 6-10 mm (in this test example, the diameter was 7.2 mm), and placed above the laser module. The irradiation parameters were 0.3-0.6 W / mm 2 (In this test example, 0.35W / mm 2 ), test the time to produce inhalable aerosol (smoke volume ≥ 3mg), the specific results are shown in the following table:

[0108] Table 7

[0109] Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Time, s 2.5 2.5 2.5 2.5 2.5 2.5 Example 7 Example 8 Example 9 Example 10 Comparative Example 1 Comparative Example 2 Time, s 2.5 2.5 2.5 2.5 3 3

[0110] 2. The laser heating atomization components obtained in each embodiment and comparative example were tested for light absorption rate. The specific test method is: light absorption rate = 1-reflectivity-transmittance; the reflectivity of the material surface and the transmittance of the material were measured with a spectrophotometer, and then calculated according to the formula. The test results are shown in the following table:

[0111] Table 8

[0112]

[0113] 3. The laser heating atomization components obtained in each embodiment and comparative example were tested for high temperature shedding. The specific test method was to make an aerosol generating product, irradiate with laser for 3 seconds, confirm the coating appearance, and after cooling, scrape the coating with a fingernail to confirm whether the coating has fallen off. The test results are shown in the following table:

[0114] Table 9

[0115] Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Shedding temperature, ℃ ≥600 ≥600 ≥600 ≥600 ≥600 ≥600 Example 7 Example 8 Example 9 Example 10 Comparative Example 1 Comparative Example 2 Shedding temperature, ℃ ≥600 ≥600 ≥600 ≥600 ≥25 ≥25

[0116] From the data in the above table, it can be seen that the aluminum foil in comparative example 1 is not roughened, so the adhesion is insufficient; the ceramic slurry composition of comparative example 2 is not within the protection scope of the present invention, resulting in a large coating thickness, and the internal stress during the ceramicization process causes warping and peeling.

[0117] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention.

Claims

1. A laser heating atomization component, characterized in that: It includes a light-absorbing coating, a roughened substrate and an atomized medium layer which are arranged in sequence; The raw materials of the light-absorbing coating include component A and component B. The component A comprises the following components in percentage by weight: 30-60% organic solvent; 30-60% inorganic filler; 2-10% siloxane monomer A; 1-10% pigment; 2-6% auxiliary agent; The B component comprises the following components in percentage by mass: 40-98% of an organic solvent; 1-4% of a binder; and 1-10% of a siloxane monomer B.

2. The laser heating atomization assembly according to claim 1, characterized in that: The thickness of the light absorbing coating is 5-30 μm; And / or, the mass ratio of component A to component B is (1-5):

1.

3. The laser heating atomization assembly according to claim 1 or 2, characterized in that: The thickness of the textured substrate is 5-50 μm; And / or, the textured substrate has Ra≥0.2um and Rz≥1um; And / or, the textured substrate is made of aluminum foil or copper foil.

4. The laser heating atomization assembly according to claim 1, characterized in that: In component A: The organic solvent comprises at least one of methanol, ethanol, methyl acetate, ethyl acetate, formic acid, isopropanol, propyl pyruvate, propionaldehyde, and acetaldehyde; And / or, the inorganic filler includes at least one of aluminum oxide, manganese oxide, silicon oxide, graphene, and diatomaceous earth; And / or, the siloxane monomer A includes at least one of methoxytrimethylsilane, trimethylsilanol, hexamethyldisiloxane, and trimethylethoxysilane; And / or, the pigment includes at least one of manganese oxide, silicon oxide, and chromium oxide; And / or, the auxiliary agent includes polyethylene glycol.

5. The laser heating atomization assembly according to claim 1, characterized in that: In component B: The binder includes at least one of polydimethylsiloxane, hexamethylenetetramine, and butyl methacrylate; And / or, the siloxane monomer B includes at least one of methyltrimethoxysilane and dimethyldimethoxysilane; And / or, the organic solvent in component B includes at least one of isopropanol and ethanol.

6. The laser heating atomization assembly according to any one of claims 1 to 5, characterized in that: The thickness of the atomized medium layer is 0.1-0.5 mm; And / or, the atomizing medium layer is composed of tobacco powder; And / or, the raw materials of the atomizing medium layer include the following components in percentage by mass: 50-90% tobacco powder; 10-50% polyhydroxy alcohol; Optionally, the polyhydric alcohol includes at least one of propylene glycol and glycerol.

7. A method for preparing a laser-heated atomization component according to any one of claims 1 to 6, characterized in that: The steps include: S1, taking a substrate material and performing a texturing treatment to obtain a texturized substrate; S2, preparing slurries of component A and component B respectively, mixing the two in proportion, applying them to one side surface of the textured substrate, and curing; S3, preparing an atomized medium slurry, applying it to the other side surface of the textured substrate, and drying it.

8. The method for preparing a laser-heated atomization component according to claim 7, characterized in that: Satisfy at least one of the following (1)-(5): (1) In step S1, roughening treatment is performed by at least one of laser treatment, electrolytic corrosion or sandblasting; (2) In step S2, the curing temperature is 200-500° C. and the curing time is 30-180 min; (3) In step S2, the coating method is spraying, printing or scraping; (4) In step S3, the coating method is a thick slurry method, a roller pressing method or a spraying method; (5) In step S3, the drying temperature is 70-90°C.

9. An aerosol generating product, characterized in that It comprises the laser heating atomization component described in any one of claims 1 to 6 or the laser heating atomization component prepared by the preparation method described in any one of claims 7 to 8.

10. An aerosol generating system, characterized in that: It comprises the aerosol generating product as claimed in claim 9 and a laser heating device, wherein the laser heating device utilizes laser to heat the aerosol generating product.

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