Atomizing core, preparation method thereof and atomizing device

Abstract

The invention discloses an atomization core, a preparation method thereof and an atomization device, and belongs to the technical field of atomization. The atomizing core comprises a liquid guide part and a heating part; the preparation raw materials of the liquid guide part comprise microcrystalline cellulose and an adhesive, the microcrystalline cellulose and the adhesive are pressed, heated and cured to form the liquid guide part, and the thermal weight loss temperature of the cured adhesive is larger than or equal to 350 DEG C. The preparation raw materials of the atomizing core and the liquid guide part comprise the microcrystalline cellulose and the adhesive, the microcrystalline cellulose is extracted after cellulose is hydrolyzed, and an amorphous region of the cellulose is mainly broken in the hydrolysis process, so that the crystallinity of the microcrystalline cellulose is higher than that of the cellulose, and the atomizing core and the liquid guide part have good heat resistance; and the thermal weight loss temperature of the cured adhesive is greater than or equal to 350 DEG C, so that the cured adhesive has relatively good thermal stability, and based on selection of the preparation raw materials, the heat resistance of the liquid guide piece can be improved, so that the service life of the atomization core is prolonged.

Description

Technical Field

[0001] The present application relates to the field of atomization technology, and in particular to an atomization core and a preparation method thereof, and an atomization device. Background Art

[0002] The atomization device is provided with an atomization core, and the atomization core is used to heat the atomization matrix to generate an aerosol. The atomization core includes a liquid guide and a heating element. The liquid guide transfers the atomization matrix to the heating element, and the heating element heats the atomization matrix to atomize it. In the related art, the material of the liquid guide is natural cellulose or regenerated cellulose, such as cotton fiber, hemp fiber, bamboo fiber, viscose fiber or lyocell fiber, etc. These materials will obviously decompose and carbonize after the temperature of the heating element exceeds 250°C, and some materials will even decompose and carbonize at 200°C. The surface structure of the liquid guide changes after carbonization, which will affect the liquid guide performance of the liquid guide, causing the atomization core to fail and resulting in a shorter life of the atomization core. Summary of the invention

[0003] The present application provides an atomizer core and a preparation method thereof, and an atomizer device, which can solve the problem of a short life of the atomizer core.

[0004] In order to solve the above-mentioned technical problems, the present application provides an atomization core, including a liquid guiding part and a heating part, which is connected to the liquid guiding part. The liquid guiding part is used to transfer the atomized matrix to the heating part, and the heating part can heat the atomized matrix to generate an aerosol; the raw materials for preparing the liquid guiding part include microcrystalline cellulose and an adhesive, and the microcrystalline cellulose and the adhesive are pressed, heated and cured to form the liquid guiding part, wherein the thermal weight loss temperature of the adhesive after curing is greater than or equal to 350°C.

[0005] In one embodiment, the mass of the adhesive is 0.1%-10% of the mass of the microcrystalline cellulose.

[0006] In one embodiment, the adhesive includes one or more of melamine formaldehyde adhesive, epoxy resin adhesive, polyimide adhesive and organic silicone adhesive.

[0007] In one embodiment, the particle size of the microcrystalline cellulose is in the range of 15 μm-100 μm, the aspect ratio is 3-20, and the degree of polymerization is greater than or equal to 300.

[0008] In one embodiment, the particle size of the adhesive is in the range of 5 μm-30 μm, and the particle size of the adhesive is smaller than the particle size of microcrystalline cellulose; and the curing temperature of the adhesive is less than or equal to 200°C.

[0009] On the other hand, the present application provides an atomization device, which includes the atomization core as described above, and the atomization core is used to heat the atomization substrate under the action of electricity to atomize it.

[0010] On the other hand, the present application provides a method for preparing an atomizer core, the preparation method comprising: mixing microcrystalline cellulose and an adhesive to obtain a mixture, wherein the thermal weight loss temperature of the adhesive after curing is greater than or equal to 350°C; pressing the mixture to obtain a liquid guide member blank, wherein the liquid guide member blank has a first direction, and the size of the liquid guide member blank obtained by pressing in the first direction is the size of the liquid guide member after molding; assembling a heating element to the liquid guide member blank to obtain an atomizer core blank, wherein the heating element has an atomizing surface for heating an atomizing matrix, and the normal direction of the atomizing surface is perpendicular to the first direction; pressing the atomizer core blank along the normal direction of the atomizing surface so that part of the microcrystalline cellulose is filled in the gap of the heating element to obtain a preformed atomizer core; adding the preformed hot atomizer core to obtain an atomizer core, wherein the atomizer core includes a liquid guide member and a heating element, and the liquid guide member is formed by curing the mixture.

[0011] In one embodiment, the porosity of the liquid-conducting member blank is greater than or equal to 75%, and the porosity of the preformed atomizer core is 45%-65%.

[0012] In one embodiment, the temperature of heating the preformed atomizer core is 120° C.-180° C., and the heating time is 15 min-40 min.

[0013] In one embodiment, before mixing the microcrystalline cellulose and the adhesive to obtain the mixture, the process further includes: drying the microcrystalline cellulose so that the water content of the microcrystalline cellulose is less than or equal to 0.5%; and / or, after heating the preformed atomizer core to obtain the atomizer core, the process further includes: placing the cooled atomizer core into a vibrating screen for vibration to remove unbonded particles.

[0014] The atomizer core and the liquid guide member provided in the present application are prepared from raw materials including microcrystalline cellulose and an adhesive. Since microcrystalline cellulose is extracted from cellulose after hydrolysis, and the hydrolysis process mainly breaks the amorphous region of cellulose, the crystallinity of the microcrystalline cellulose is higher than that of cellulose, thereby having better heat resistance. The thermal weight loss temperature of the adhesive after curing is greater than or equal to 350°C, so that the adhesive has better thermal stability after curing. Based on the selection of the preparation raw materials, the heat resistance of the liquid guide member can be improved, thereby increasing the life of the atomizer core. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a structural schematic diagram of an embodiment of an atomization device provided by the present application;

[0017] Figure 2 It is a structural schematic diagram of an embodiment of the atomizer core provided by the present application;

[0018] Figure 3 It is a schematic diagram of a process of an embodiment of a method for preparing an atomizer core provided in the present application;

[0019] Figure 4 It is a schematic flow chart of another embodiment of the method for preparing the atomizer core provided by the present application;

[0020] Figure 5 It is a schematic flow chart of another embodiment of the method for preparing the atomizer core provided in the present application. DETAILED DESCRIPTION

[0021] The present application is further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application rather than all embodiments, and all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0022] In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically limited. The terms "first", "second", and "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", and "third" can expressly or implicitly include at least one of the features. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "including" and "having" in the embodiments of the present application and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or components inherent to these processes, methods, products, or devices.

[0023] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0024] This application provides an atomization device. Figure 1 , Figure 2 , the atomizing device 100 may include an atomizer 10. The atomizer 10 stores an atomizing matrix, and the atomizer 10 may atomize the atomizing matrix into an aerosol. The atomizer 10 may include an atomizing core 11 and an oil cup (not shown in the figure). The oil cup is used to store the atomizing matrix, and the atomizing core 11 is installed in the oil cup. The atomizing core 11 is used to heat the atomizing matrix under the action of electricity to atomize it.

[0025] Please continue reading Figure 1 , Figure 2 , the atomizing device 100 may also include an atomizing host 20, and the atomizer 10 is electrically connected to the atomizing host 20. The atomizing host 20 may include a battery (not shown in the figure) and a control circuit board (not shown in the figure), so that the atomizing host 20 can control the working state of the atomizer 10. For example, the atomizing host 20 can control the atomizer 10 to heat the atomizing matrix to generate an aerosol or stop heating according to the user's suction action. The atomizer 10 and the atomizing host 20 may be fixedly connected or detachably connected. When the atomizer 10 and the atomizing host 20 are detachably connected, if the remaining amount of the atomizing matrix in the atomizer 10 is less than the preset value, the user can easily separate the atomizer 10 from the atomizing host 20, and the atomizing device 100 continues to be used after the atomizer 10 is replaced, so that the atomizing host 20 can be used multiple times, thereby reducing the user's use cost.

[0026] See also Figure 2 , the atomizing core 11 may include a heating element 111 and a liquid guiding element 112, and the heating element 111 is connected to the liquid guiding element 112. The liquid guiding element 112 is a porous medium with pores inside, and the liquid guiding element 112 is used to transfer the atomized matrix to the heating element 111. The material of the heating element 111 may be metal, and the heating element 111 may heat the atomized matrix to generate an aerosol. The liquid guiding element 112 may be in a hollow cylindrical shape, and accordingly, the heating element 111 may be in a hollow grid shape or spiral shape, and the heating element 111 is accommodated in the liquid guiding element 112, and the heating element 111 is connected to the inner wall of the liquid guiding element 112. The liquid guiding element 112 may also be in a block shape, and accordingly, the heating element 111 is in a sheet or strip shape, and the heating element 111 is embedded or attached to one side of the liquid guiding element 112. The heating element 111 is connected to the liquid guiding element 112 so that the heating element 111 and the liquid guiding element 112 form a relatively independent module, which is convenient for modular assembly of the atomizer core 11 and can improve production efficiency.

[0027] The raw materials for preparing the liquid-conducting part include microcrystalline cellulose and an adhesive, and the microcrystalline cellulose and the adhesive are pressed, heated and cured to form a liquid-conducting part. Microcrystalline cellulose (MCC), whose main component is a linear polysaccharide bonded by β-1,4-glucosidic bonds, is a short rod-shaped or powdered porous particle extracted by hydrolysis of natural cellulose. The thermal weight loss temperature of the adhesive after curing is greater than or equal to 350°C. In thermogravimetry analysis (TG or TGA for short), the temperature at which the sample mass decreases by 5% is the thermal weight loss temperature, and the thermal weight loss temperature can be used to monitor the stability and consistency of the material. In some embodiments, the thermal weight loss temperature of the adhesive after curing is 350°C, 360°C, 370°C, 380°C, 390°C or 400°C, so that the adhesive has good thermal stability after curing.

[0028] The atomizer core and the liquid guide member provided in the present application are prepared from raw materials including microcrystalline cellulose and an adhesive. Since microcrystalline cellulose is extracted from cellulose after hydrolysis, and the hydrolysis process mainly breaks the amorphous region of cellulose, the crystallinity of the microcrystalline cellulose is higher than that of cellulose, thereby having better heat resistance. The thermal weight loss temperature of the adhesive after curing is greater than or equal to 350°C, so that the adhesive has better thermal stability after curing. Based on the selection of the preparation raw materials, the heat resistance of the liquid guide member can be improved, thereby increasing the life of the atomizer core.

[0029] In one embodiment, the mass of the adhesive is 0.1%-10% of the mass of the microcrystalline cellulose. If the mass of the adhesive is less than 0.1% of the mass of the microcrystalline cellulose, the amount of adhesive used is small, and it is difficult for the adhesive to bond the microcrystalline cellulose particles together, which will affect the integrity of the liquid-conducting part; if the mass of the adhesive is greater than 10% of the mass of the microcrystalline cellulose, the amount of adhesive used is large, and the adhesive is wrapped around the microcrystalline cellulose. The outer surface of the microcrystalline cellulose is covered by the adhesive, which will affect the lipophilicity of the liquid-conducting part, resulting in insufficient liquid conduction rate of the liquid-conducting part. In some embodiments, the mass of the adhesive is 0.1%, 0.5%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9% or 10% of the mass of the microcrystalline cellulose, which is not specifically limited here.

[0030] In one embodiment, the adhesive includes one or more of melamine formaldehyde adhesive, epoxy resin adhesive, polyimide adhesive and organic silicone adhesive. The above adhesives all have good thermal stability and can increase the life of the atomizer core.

[0031] In one embodiment, the particle size of microcrystalline cellulose ranges from 15 μm to 100 μm, the aspect ratio is 3-20, and the degree of polymerization is greater than or equal to 300. By controlling the particle size, aspect ratio and degree of polymerization of microcrystalline cellulose, the consistency of the prepared raw materials can be ensured, so that the liquid conduction rate of the liquid-conducting part after molding is relatively stable, and the taste consistency of the aerosol can be improved. The degree of polymerization of microcrystalline cellulose is controlled at 300 or above, so that the microcrystalline cellulose particles have a relatively large particle size. After the adhesive bonds the microcrystalline cellulose particles into a liquid-conducting part, a larger gap can be maintained between the microcrystalline cellulose particles, thereby meeting the porosity requirements of the liquid-conducting part. In some embodiments, the degree of polymerization of microcrystalline cellulose is 300, 320, 340 or 360.

[0032] In one embodiment, the particle size of the adhesive is in the range of 5 μm-30 μm, and the particle size of the adhesive is smaller than the particle size of the microcrystalline cellulose. The particle size of the adhesive is controlled to be smaller than the particle size of the microcrystalline cellulose, so that the adhesive can cover the outer surface of the microcrystalline cellulose as little as possible while bonding the microcrystalline cellulose particles together, thereby ensuring the lipophilicity of the liquid-conducting member to meet the liquid-conducting rate requirement of the liquid-conducting member.

[0033] In one embodiment, the curing temperature of the adhesive is less than or equal to 200° C. Generally speaking, the decomposition temperature of microcrystalline cellulose is above 200° C. The curing temperature of the adhesive is controlled to be less than or equal to 200° C., so that the curing temperature of the adhesive is lower than the decomposition temperature of the microcrystalline cellulose. The adhesive can not only bond the microcrystalline cellulose particles together, but also prevent the microcrystalline cellulose from decomposing during the preparation process.

[0034] This application provides a method for preparing an atomizer core. Figure 3 The method for preparing the atomizer core may include steps S10-S30:

[0035] S10, mixing microcrystalline cellulose and an adhesive to obtain a mixture, wherein the thermal weight loss temperature of the adhesive after curing is greater than or equal to 350° C. The raw materials for preparing the liquid guide include microcrystalline cellulose and an adhesive. Since microcrystalline cellulose has good heat resistance and the adhesive has good thermal stability after curing, based on the selection of the raw materials, the heat resistance of the liquid guide can be improved, thereby increasing the life of the atomizer core.

[0036] S20, pressing the mixture to obtain a liquid-conducting component blank, wherein the liquid-conducting component blank has a first direction, and the size of the liquid-conducting component blank obtained by pressing in the first direction is the size of the liquid-conducting component after molding. The mixture can be pressed with the aid of a mold, and the mold has an inner space of a preset shape, so as to obtain a liquid-conducting component blank of a preset shape by pressing. The liquid-conducting component blank can be cylindrical or flat, and correspondingly, the atomizer core after molding is also roughly cylindrical or flat. The first direction can be the extension direction of the heating element of the molded atomizer core. For example, when the atomizer core is cylindrical, the first direction can be the axial direction of the cylindrical atomizer core; for another example, when the atomizer core is flat, the first direction can be the length direction of the plate-like atomizer core. The size of the liquid-conducting component blank obtained by pressing in the first direction is controlled to be the size of the liquid-conducting component after molding, so that the size of the liquid-conducting component blank in the first direction reaches a preset size after the first pressing, and there is no need to press in the first direction in the subsequent processing process. This can prevent the liquid-conducting component blank from driving the heating component to move after the heating component is assembled, causing the heating component to bend and deform, such as local arching or warping of the heating component.

[0037] S30, assembling the heating element to the liquid-conducting element blank to obtain an atomizing core blank, wherein the heating element has an atomizing surface for heating the atomizing matrix, and the normal direction of the atomizing surface is perpendicular to the first direction. For example, when the liquid-conducting element blank is cylindrical, the heating element can be attached to the inner wall of the liquid-conducting element blank so that the normal direction of the atomizing surface is perpendicular to the first direction to prevent the heating element from bending and deforming during subsequent processing; for another example, when the liquid-conducting element blank is flat, the heating element can be attached to one side of the liquid-conducting element blank so that the normal direction of the atomizing surface is perpendicular to the first direction to prevent the heating element from bending and deforming during subsequent processing.

[0038] S40, pressing the atomizer core blank along the normal direction of the atomization surface so that part of the microcrystalline cellulose is filled in the gap of the heating element to obtain a preformed atomizer core. By pressing the atomizer core blank in the normal direction of the atomization surface, part of the microcrystalline cellulose is filled in the gap of the heating element. Correspondingly, the heating element is embedded in the liquid guide blank, so that the heating element and the liquid guide blank are bonded to each other, which can improve the integrity of the atomizer core after processing. When the atomizer core blank is pressed for the second time, the pressing direction is the normal direction of the atomization surface. Since the normal direction of the atomization surface is perpendicular to the first direction, and the first direction can be the extension direction of the heating element of the atomizer core after forming, the pressing direction is along the thickness direction of the heating element, so that part of the microcrystalline cellulose can be filled in the gap of the heating element when the liquid guide blank is pressed. If the atomizer core blank is pressed along the first direction at this time, the part of the liquid guide blank filled in the gap of the heating element will drive the heating element to move in the first direction, causing the heating element to bend and deform, for example, the heating element is partially arched or warped.

[0039] In the related art, the liquid guide material is generally made of spunlace non-woven fabrics. This process will cause a large error in the thickness of the liquid guide during molding. The inconsistent thickness will cause changes in the liquid guide rate, which will affect the consistency of the aerosol taste. The present application presses the atomizer core blank equipped with a heater so that the heater and the liquid guide are integrated. Since the thickness of the liquid guide after molding depends on the precision of the mold or jig, and the precision of the mold or jig is controllable, the thickness consistency of the liquid guide is good, which can improve the consistency of the aerosol taste.

[0040] S50, heating the preformed atomizer core to obtain the atomizer core, wherein the atomizer core includes a liquid guide and a heating element, and the liquid guide is formed by curing the mixture. Exemplarily, the preformed atomizer core can be placed in an oven for heating and curing. Heating the preformed atomizer core can cure the adhesive, thereby bonding the microcrystalline cellulose particles together.

[0041] In one embodiment, the porosity of the liquid guide blank is greater than or equal to 75%, and the porosity of the preformed atomizer core is 45%-65%. The mixture is pressed twice, and the porosity of the liquid guide blank after the first pressing is controlled to be greater than or equal to 75%. On the one hand, the liquid guide blank has a certain shape, which is convenient for assembling the heating element; on the other hand, the porosity of the liquid guide blank after the first pressing is greater than the porosity of the liquid guide after molding, so that the liquid guide blank needs to be pressed twice to facilitate the mutual bonding of the heating element and the liquid guide blank, thereby improving the integrity of the atomizer core after processing and molding.

[0042] In one embodiment, the temperature of heating the preformed atomizer core is 120°C-180°C, and the heating time is 15min-40min. Controlling the heating temperature to 120°C-180°C can prevent the decomposition of microcrystalline cellulose due to excessively high heating temperature, and can also prevent the curing time of the adhesive due to excessively low heating temperature, thereby improving production efficiency.

[0043] In one embodiment, the preformed atomizer core may be heated in stages under a preset temperature condition, for example, first heated at a relatively low temperature for 10 min to 20 min, and then heated at a relatively high temperature for 10 min to 20 min to remove the unreacted small molecules.

[0044] In one embodiment, see Figure 4 , before step S10, it also includes step S05:

[0045] S05, drying the microcrystalline cellulose so that the water content of the microcrystalline cellulose is less than or equal to 0.5%. Drying the microcrystalline cellulose can reduce the water content of the microcrystalline cellulose and ensure the consistency of the prepared raw materials.

[0046] In one embodiment, see Figure 5, step S50 further includes step S60:

[0047] S60, placing the cooled atomizer core into a vibrating screen for vibration to remove unbonded particles. The vibration time may be 20 minutes to 30 minutes. Removing unbonded particles by vibration can prevent unbonded particles of the atomizer core from falling off and entering the atomization matrix during use to affect the taste.

[0048] The present application is described below through specific examples, in which an atomizer core is prepared according to the above preparation method. The following examples are only some examples of the present application and are not intended to limit the present application.

[0049] Embodiment 1:

[0050] Flat atomization core: select 1000g of microcrystalline cellulose with a particle size range of 75μm-90μm, dry it in an oven at 105℃ for 1h, and the final moisture content is 0.1%. Add melamine formaldehyde resin powder adhesive with a particle size range of 15μm-30μm and an addition amount of 10g, mix evenly, press and pre-form in a mold, and control the porosity between 75% and 85%. Then embed the heating element, press and form again in the direction perpendicular to the heating element, and control the porosity between 45% and 50%. After demolding, put it in an oven for curing, cure it at 140℃ for 20min, and then cure it at 160℃ for 20min. Vibrate it through a vibrating screen for 30min to remove the particles that are not firmly bonded to obtain the final product.

[0051] Embodiment 2:

[0052] Cylindrical atomization core: select 1000g of microcrystalline cellulose with a particle size range of 75μm-90μm, dry it in an oven at 105℃ for 1h, and the final moisture content is 0.1%. Add melamine formaldehyde resin powder adhesive with a particle size range of 15μm30μm and an addition amount of 10g. Mix well, press and preform in a mold, and control the porosity between 75% and 80%. Then embed a heating element and press and form again in the direction of the center of the cylinder. The final porosity is controlled between 50% and 55%. After demolding, put it in an oven for curing, cure it at 140℃ for 20min, and then cure it at 160℃ for 20min. Vibrate it through a vibrating screen for 30min to remove the particles that are not firmly bonded to obtain the final product.

[0053] Comparative Example 1: Cotton fiber was used to prepare a flat atomization core.

[0054] Comparative Example 2: Cotton fiber was used to prepare a cylindrical atomizer core.

[0055] The atomizer cores prepared in the embodiment and the comparative example were loaded into the same atomizer device for testing, and the life span of the atomizer core and the maximum number of puffs of taste consistency were tested.

[0056] Puffs test of the life of the atomizer core: test the weight of the atomizer device before and after 100 puffs, calculate the atomization volume of each puff, and when the atomization base mass remains 1 / 3, re-inject the atomization base for testing, and take the number of puffs when the atomization volume per puff is 30% of the initial atomization volume as the life of the atomizer core.

[0057] Maximum number of puffs for taste consistency: After every 100 puffs, 3 people were asked to taste the cigarette manually and score it from 1 to 10. When the average score was lower than 7, the maximum number of puffs was recorded.

[0058] The test results are shown in Table 1.

[0059] Table 1 Test results

[0060] Number of life span Maximum number of mouthfeel consistency Example 1 12000 2800 Example 2 13000 3200 Comparative Example 1 5000 1200 Comparative Example 2 5500 1000

[0061] The test results show that the life span of the embodiment is more than twice that of the control, and the maximum number of mouthfuls of taste consistency of the embodiment is nearly 3 times that of the control. It can be seen that the raw materials for preparing the liquid guide part of the atomizer core provided in the present application include microcrystalline cellulose and adhesive. Since microcrystalline cellulose has good heat resistance and the adhesive has good thermal stability after curing, the heat resistance of the liquid guide part can be improved based on the selection of the raw materials, thereby improving the life of the atomizer core.

[0062] The above descriptions are only some embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An atomizer core, characterized in that: It comprises a liquid guide and a heating element, wherein the heating element is connected to the liquid guide, the liquid guide is used to transfer the atomized substrate to the heating element, and the heating element can heat the atomized substrate to generate an aerosol; The raw materials for preparing the liquid-conducting part include microcrystalline cellulose and an adhesive, and the microcrystalline cellulose and the adhesive are pressed, heated and cured to form the liquid-conducting part, wherein the thermal weight loss temperature of the adhesive after curing is greater than or equal to 350°C.

2. The atomizer core according to claim 1, characterized in that: The mass of the adhesive is 0.1%-10% of the mass of the microcrystalline cellulose.

3. The atomizer core according to claim 1, characterized in that: The adhesive includes one or more of melamine formaldehyde adhesive, epoxy resin adhesive, polyimide adhesive and organic silicone adhesive.

4. The atomizer core according to claim 1, characterized in that: The particle size of the microcrystalline cellulose is in the range of 15 μm to 100 μm, the aspect ratio is 3 to 20, and the degree of polymerization is greater than or equal to 300.

5. The atomizer core according to any one of claims 1 to 4, characterized in that: The particle size of the adhesive is in the range of 5 μm to 30 μm, and the particle size of the adhesive is smaller than the particle size of the microcrystalline cellulose; The curing temperature of the adhesive is less than or equal to 200°C.

6. An atomizing device, characterized in that: The atomizer core comprises the atomizer core as described in any one of claims 1 to 5, wherein the atomizer core is used to heat the atomizer substrate under the action of electricity to atomize it.

7. A method for preparing an atomizer core, characterized in that: include: Mixing microcrystalline cellulose and an adhesive to obtain a mixture, wherein the thermal weight loss temperature of the adhesive after curing is greater than or equal to 350° C.; Pressing the mixture to obtain a liquid-conducting component blank, wherein the liquid-conducting component blank has a first direction, and the size of the liquid-conducting component blank obtained by pressing in the first direction is the size of the liquid-conducting component after molding; Assembling a heating element to the liquid guide element blank to obtain an atomizing core blank, wherein the heating element has an atomizing surface for heating an atomized matrix, and a normal direction of the atomizing surface is perpendicular to the first direction; Pressing the atomizer core blank along the normal direction of the atomization surface so that part of the microcrystalline cellulose is filled in the gap of the heating element to obtain a preformed atomizer core; The preformed atomizer core is heated to obtain an atomizer core, wherein the atomizer core comprises the liquid guide member and the heating member, and the liquid guide member is formed by curing the mixed material.

8. The preparation method according to claim 7, characterized in that: The porosity of the liquid-conducting component blank is greater than or equal to 75%, and the porosity of the preformed atomizing core is 45%-65%.

9. The preparation method according to claim 7, characterized in that: The preformed atomizer core is heated to a temperature of 120° C.-180° C. for a heating time of 15 min-40 min.

10. The preparation method according to claim 7, characterized in that: The mixing of microcrystalline cellulose and adhesive to obtain a mixed material also includes: Drying the microcrystalline cellulose so that the water content of the microcrystalline cellulose is less than or equal to 0.5%; And / or, after heating the preformed atomizer core to obtain the atomizer core, the method further comprises: The cooled atomizing core is placed in a vibrating screen for vibration to remove unbonded particles.

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