A heat-not-burn smoking segment and its production method and application

Abstract

The application provides a heating non-combustion smoking segment and a production method and application thereof, and the production method comprises the following steps: providing a tobacco powder hydrogel; the tobacco powder hydrogel at least comprises a hydrogel, tobacco powder, a smoking agent, plant fibers and water; coating the tobacco powder hydrogel on a mold, and performing vacuum freeze drying after freeze coagulation to obtain tobacco powder aerogel; slicing the tobacco powder aerogel to obtain smoking aerogel slices; rolling the smoking aerogel slices into long cylinders; cutting the long cylinders to form short cylinders with a predetermined length; and wrapping the short cylinders with a paper tube. The production method can accelerate the production efficiency of the plant polysaccharide aerogel heating non-combustion smoking segment and reduce the suction resistance of the smoking segment.

Description

Technical Field

[0001] This invention belongs to the field of tobacco processing technology, specifically relating to a heated non-combustible smoke-generating section, its production method, and its application. Background Technology

[0002] Heated tobacco products maintain a low temperature during inhalation, heating the tobacco without burning it, thus significantly reducing or even eliminating tar production. Heated tobacco products provide consumer satisfaction while minimizing harm to the body and reducing environmental pollution. Therefore, in the context of environmental protection and health promotion, heated tobacco products are highly popular among consumers.

[0003] The smoking section of heated cigarettes is mainly composed of reconstituted tobacco sheets. During production, the reconstituted tobacco leaves are shredded and then rolled. Because heated cigarettes are heated in an lighter and then inhaled, the lighting chamber is highly sealed, preventing sufficient cold air from entering the smoking section to cool the smoke. This results in difficulty controlling the inhaled smoke temperature, affecting the smoking experience. Secondly, since the lighter uses a sheet-shaped heating needle for localized heating, the high density of the tobacco sheets affects the heat conduction of the heating needle, leading to low utilization of a large amount of tobacco sheets and wasted raw materials. Thirdly, currently, the tobacco sheets in the smoking section of heated electronic cigarettes are arranged axially. These sheets hinder the exchange and mixing of smoke, resulting in dispersed and unfocused smoke and a poor smoking experience.

[0004] Chinese patent document CN 112545047 A (publication date: March 26, 2021) discloses a plant polysaccharide aerogel heated non-combustible flavor smoke generating material. It uses plant polysaccharides as the skeleton and binder for the flavor smoke segment. The material is porous and loose, with all raw materials evenly distributed within the aerogel skeleton. The resulting plant polysaccharide aerogel heated non-combustible flavor smoke generating material can have a smoke-generating agent loading 2-5 times that of a thin-sheet flavor smoke segment. This technical solution uses vacuum freeze-drying to obtain the smoke-generating segment, which is bound by a paper tube. During vacuum freezing, the rate of moisture escape is reduced, decreasing production efficiency. Furthermore, the moisture escape outlets are located at both ends of the paper tube, resulting in varying moisture content throughout the 120mm long smoke-generating segment, causing product differences. Additionally, the smoke-generating segment prepared using this method exhibits poor absorption stability. Summary of the Invention

[0005] This invention provides a heat-resistant non-combustible smoke-generating section and its production method, with the aim of accelerating the production efficiency of the plant polysaccharide aerogel heat-resistant non-combustible smoke-generating section and reducing the absorption resistance of the smoke-generating section.

[0006] The technical solution provided by this invention is as follows:

[0007] In a first aspect, the present invention provides a method for producing a heated, non-combustible smoke-generating section, comprising the following steps:

[0008] A tobacco powder hydrogel is provided; the tobacco powder hydrogel comprises at least a hydrogel, tobacco powder, a smoking agent, plant fiber, and water;

[0009] Tobacco powder hydrogel was coated onto a mold, frozen and solidified, and then vacuum freeze-dried to obtain tobacco powder aerogel.

[0010] Cut tobacco powder aerogel into thin slices of smoke-generating aerogel;

[0011] The aerogel sheet that produces smoke is rolled into a long cylinder;

[0012] The long cylinder is cut short to form a short cylinder of a predetermined length;

[0013] A paper tube is wrapped around the outside of a short cylinder.

[0014] In some embodiments of the present invention, the method of rolling the aerogel sheet into a long cylinder is as follows: (i) stacking multiple aerogel sheets and rolling them into a rolled long cylinder; or, (ii) rolling a single aerogel sheet into a rolled long cylinder; or, (iii) bending one or more aerogel sheets into a long cylinder.

[0015] In some embodiments of the present invention, the tobacco powder is composed of 20-40 mesh tobacco powder and 80-120 mesh tobacco powder, and the weight ratio of 20-40 mesh tobacco powder to 80-120 mesh tobacco powder is 1:4-6.

[0016] In some embodiments of the present invention, the tobacco powder hydrogel further comprises a thickener.

[0017] In some embodiments of the present invention, the thickness of the tobacco powder aerogel is 1 mm to 15 mm, and the length and width are 300 mm to 700 mm; the thickness of the smoke-generating aerogel sheet is 0.2 mm to 2 mm.

[0018] In some embodiments of the present invention, the tobacco powder hydrogel further comprises a preservative, the preservative including at least one of benzoate and potassium sorbate.

[0019] In some embodiments of the present invention, the tobacco powder hydrogel further contains tea powder and / or traditional Chinese medicine powder.

[0020] In some embodiments of the present invention, the freezing temperature is -5℃ to -40℃, and the vacuum freeze-drying pressure is 10 to 400 Pa.

[0021] In some embodiments of the present invention, when the tobacco powder hydrogel is coated onto the mold, the total thickness of the coated tobacco powder hydrogel is 1 to 10 mm.

[0022] In some embodiments of the present invention, the aerogel sheet is rolled into an elongated cylinder with a diameter of 4 to 8 mm.

[0023] In some embodiments of the present invention, the hydrogel is a plant polysaccharide, which includes one or more of wheat starch, konjac glucomannan, mung bean starch, corn starch, pullulan, and sodium alginate.

[0024] Secondly, the present invention provides a heated non-combustible smoke-generating section, comprising a paper tube and at least one smoke-generating aerogel sheet filled inside the paper tube, wherein the smoke-generating aerogel sheet is rolled or bent, dividing the space inside the paper tube into multiple smoke channels extending longitudinally along the paper tube.

[0025] In some embodiments of the present invention, the maximum width of the flue gas passage is 0.05 to 0.2 mm.

[0026] In some embodiments of the present invention, the thickness of the smoke-generating aerogel sheet is 0.2 to 2 mm.

[0027] In some embodiments of the present invention, the aerogel sheet is formed by slicing an aerogel containing tobacco powder.

[0028] In some embodiments of the present invention, the density of the aerogel sheet is 0.5–0.7 g / cm³. 3 The aerogel sheet contains 30wt% to 65wt% tobacco powder.

[0029] In some embodiments of the present invention, the aerogel sheet further contains at least one of a preservative, tea powder, and traditional Chinese medicine powder.

[0030] Thirdly, the present invention provides a heated non-combustible smoke generator, comprising a heating needle and the aforementioned heated non-combustible smoke generator section, wherein the heating needle is inserted into the heated non-combustible smoke generator section along its length.

[0031] Compared with the prior art, the present invention has at least the following beneficial effects:

[0032] 1. Compared with the existing technology of extruding hydrogel into a paper tube and then freeze-drying, the production method of the present invention prepares a smoking aerogel sheet outside the paper tube, which improves the drying efficiency and ensures that the moisture in the aerogel is evenly distributed along the longitudinal direction of the paper tube. The moisture content of the dried smoking aerogel sheet is between 8wt% and 15wt%.

[0033] 2. In the heated non-combustible smoke-generating section produced by the present invention, the smoke-generating aerogel sheet divides the space inside the paper tube into multiple smoke channels extending longitudinally along the paper tube, thereby reducing the suction resistance. Attached Figure Description

[0034] Figure 1 : A schematic diagram of the cross-section of the long cylinder prepared by the (iii)th folding method. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with the embodiments of this invention. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0036] For simplicity, this document only explicitly discloses some numerical ranges. However, any lower limit can be combined with any upper limit to form an unspecified range; and any lower limit can be combined with other lower limits to form an unspecified range. Similarly, any upper limit can be combined with any other upper limit to form an unspecified range. Furthermore, although not explicitly stated, every point or individual value between the endpoints of a range is included within that range. Therefore, each point or individual value can be used as its own lower or upper limit, combined with any other point or individual value, or combined with other lower or upper limits to form an unspecified range.

[0037] It should be noted that, in the description herein, unless otherwise stated, "above" and "below" include the stated number, and "multiple" in "one or more" means two or more. Relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] In the description of this specification, the references to terms such as "any embodiment / mode," "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0039] The above description of the invention is not intended to describe every disclosed embodiment or implementation of the invention. Exemplary embodiments are described in more detail below. These embodiments can be used in various combinations. In each example, the listing is merely representative and should not be construed as exhaustive.

[0040] The term "sheet utilization rate" in this invention refers to the percentage by weight of the charred smoke-generating aerogel sheet in the heated non-combustible smoke-generating section relative to the total smoke-generating aerogel sheet. The term "suction resistance" in this invention refers to the pressure that forces air through the entire cigarette, typically expressed as pressure drop, suction resistance, draw resistance, draw force, and draw resistance. In this embodiment of the invention, pressure drop is used to represent suction resistance. The term "rolled" in this invention refers to a layer-by-layer outward curling.

[0041] Production methods

[0042] As described in the background section, existing techniques involve extruding plant polysaccharide aerogel into a paper tube, freezing it, and then performing vacuum freeze-drying. Moisture can only escape from both ends of the paper tube, resulting in slow drying. This method also leads to uneven moisture distribution along the longitudinal direction of the paper tube. Furthermore, while the integrally formed plant polysaccharide aerogel produced by this method has a porous structure, it is not entirely interconnected; the flue gas meanders through the aerogel, resulting in significant resistance. This invention prepares an integrally formed smoke-generating section according to Example 1 of Chinese Patent Document CN112545047 A (publication date: March 26, 2021). However, the smoke-generating section itself has difficulty controlling suction resistance, and tobacco powder is prone to detachment when the heating needle is inserted.

[0043] To address the above problems, this invention provides a method for producing a heated, non-combustible smoke-generating section, comprising the following steps:

[0044] A tobacco powder hydrogel is provided; the tobacco powder hydrogel comprises at least a hydrogel, tobacco powder, a smoking agent, plant fiber, and water;

[0045] Tobacco powder hydrogel was coated onto a mold, frozen and solidified, and then vacuum freeze-dried to obtain tobacco powder aerogel.

[0046] Cut tobacco powder aerogel into thin slices of smoke-generating aerogel;

[0047] The aerogel sheet that produces smoke is rolled into a long cylinder;

[0048] A long cylinder is cut into shorter cylinders of a predetermined length along its length.

[0049] A paper tube is wrapped around the outside of a short cylinder.

[0050] The production method of the present invention involves making aerogel on the outside of a paper tube and coating tobacco powder hydrogel onto a mold. The tobacco powder hydrogel has a large exposed area, uniform dehydration, and high efficiency, thereby accelerating the production efficiency of the heating and non-combustible smoke-generating section of plant polysaccharide aerogel.

[0051] The production method of this invention involves rolling a smoke-generating aerogel sheet into an elongated cylinder. The rolled or bent shape of the aerogel sheet divides the space inside the paper tube into multiple smoke channels extending longitudinally along the paper tube. The smoke can travel unimpeded along these straight channels, resulting in low suction resistance in the smoke-generating section of this invention. Furthermore, the dimensions of the smoke channels can be adjusted according to actual needs to regulate the suction resistance.

[0052] In the production method of this invention, during the process of cutting tobacco powder aerogel into smoke-generating aerogel sheets, part of the closed cavity is cut open, forming through holes on the surface of the smoke-generating aerogel sheets. This invention uses internal heating for the heated non-combustible smoke-generating section, that is, a heating needle is inserted into the heated non-combustible smoke-generating section to heat from the core, generating hot smoke. The through holes on the surface of the smoke-generating aerogel sheets facilitate the movement of hot smoke between the sheets, allowing it to quickly reach the sheets radially away from the heating needle and heat them, thereby improving heat transfer efficiency.

[0053] The production method of the present invention involves rolling aerogel sheets into long cylinders using the following methods: (i) stacking multiple aerogel sheets and rolling them into a rolled long cylinder; or (ii) rolling a single aerogel sheet into a rolled long cylinder; or (iii) bending one or more aerogel sheets into a long cylinder. Method (i) has high rolling efficiency; method (ii) is simple to operate and produces uniform distribution of the aerogel sheets between layers; the first two methods yield rolled-up flue gas channels. In the long cylinder prepared by method (iii), the bent aerogel sheets divide the space inside the paper tube into multiple flue gas channels extending longitudinally along the paper tube.

[0054] The compactness of the heated non-combustible smoke-generating section is related to its suction resistance. In the production method of this invention, during the process of rolling the smoke-generating aerogel sheet into a long cylinder, tight rolling should be avoided. Preferably, when using the first and second rolling methods, the gap between adjacent smoke-generating aerogel sheets is 0.05–0.2 mm, resulting in a relatively loose roll. Optionally, when using the first rolling method, 3–5 smoke-generating aerogel sheets are stacked and rolled into a long cylinder.

[0055] The present invention can also add a thickener, such as sodium carboxymethyl cellulose, to the tobacco powder hydrogel to increase the viscosity of the tobacco powder hydrogel and prevent the tobacco powder hydrogel from flowing freely after being coated on the mold.

[0056] There is no intention to limit the size of the tobacco powder aerogel and the aerogel sheet. In some embodiments of the present invention, the thickness of the tobacco powder aerogel is 1 mm to 15 mm, and the length and width are 300 mm to 700 mm; the thickness of the aerogel sheet is 0.2 mm to 2 mm, preferably 0.2 mm to 1 mm, and more preferably 0.2 mm to 0.6 mm. When the tobacco powder hydrogel is coated on the mold, the total thickness of the coated tobacco powder hydrogel is 1 mm to 10 mm, thus preparing a tobacco powder aerogel with a thickness of 1 mm to 15 mm. The tobacco powder aerogel is cut into aerogel sheets from a direction perpendicular to the thickness direction. Although the present invention does not limit the length and width of the aerogel sheets, they should be kept as consistent as possible with the tobacco powder aerogel. The purpose is to roll the larger aerogel sheets into long cylinders, and then cut the long cylinders into short cylinders of a predetermined length. This production method of the present invention is more efficient than cutting the aerogel sheet into small pieces and then directly rolling them into short cylinders of a predetermined length.

[0057] In the production method of this invention, the tobacco powder hydrogel includes at least hydrogel, tobacco powder, smoking agent, plant fiber, and water. To facilitate the removal of the tobacco powder aerogel from the mold after vacuum freeze-drying, a flat mold is used in this invention. To adapt to the mold and control the thickness of the wet tobacco powder hydrogel block, the tobacco powder hydrogel is coated onto the mold using a scraping method. For better scraping, the viscosity of the tobacco powder hydrogel is controlled between 30,000 and 50,000 mPa·s, and its solid content is controlled between 25 wt% and 40 wt%. In this invention, the hydrogel acts not only as a binder but also as a dispersant, thickener, and viscous agent. Those skilled in the art can adjust the hydrogel content according to actual needs, and thickeners can be added if necessary. Thickeners include one or more of sodium carboxymethyl cellulose, hydroxyethyl cellulose, gum arabic, pectin, agar, gelatin, seaweed gum, carrageenan, and dextrin. The smoke-generating agent in the tobacco powder hydrogel of this invention promotes the volatilization of smoke and increases the amount of smoke. The smoke-generating agent includes one or a combination of propylene glycol and glycerol. This invention may also add a preservative to the tobacco powder hydrogel to extend the shelf life of the heated, non-combustible smoke-generating section. The preservative includes one or more of benzoates and potassium sorbate.

[0058] The production method of this invention requires controlling the order in which the components are added: first, the hydrogel is added to hot water to form a solution A; after cooling, a smoking agent is added and dispersed evenly; then, tobacco powder is added and mixed thoroughly. The addition of tobacco powder rapidly increases the viscosity of the solution, leading to uneven dispersion of the remaining liquids and quality problems. Therefore, this invention requires strict control over the order in which the raw materials are added.

[0059] The tobacco powder aerogel of this invention does not require very high tensile and compressive strength, but needs to be easy to cut and not easily crushed. The tobacco powder in the aerogel of this invention accounts for 30wt% to 65wt%, and the particle size of the tobacco powder is not a single size, but rather a blend of tobacco powders with different particle sizes. This is to effectively enhance the structural strength of the tobacco powder aerogel and also improve the porosity and thermal conductivity of the smoke-generating aerogel sheets. Preferably, the tobacco powder used in this invention consists of 20-40 mesh tobacco powder and 80-120 mesh tobacco powder, with a weight ratio of 1:4-6. The purpose of using 20-40 mesh tobacco powder is to enhance the structural properties of the tobacco powder aerogel, and the purpose of using 80-120 mesh tobacco powder is to increase the smoke output. However, the fiber length and specific surface area of ​​40-80 mesh tobacco powder are not long enough, and its contribution to enhancing the structural properties of the tobacco powder aerogel and increasing the smoke output is not significant.

[0060] The hydrogel used in this invention is a plant polysaccharide, including one or more of wheat starch, konjac glucomannan, mung bean starch, corn starch, pullulan, and sodium alginate. These plant polysaccharides have high solubility in water and can solidify at low temperatures, forming an aerogel with a certain strength after freezing. In the embodiments of this invention, corn starch is used as the hydrogel, which is low in cost and environmentally friendly.

[0061] In some embodiments of the present invention, the tobacco powder hydrogel further contains tea powder and / or traditional Chinese medicine powder.

[0062] The production method of the present invention involves vacuum freeze-drying after freezing and condensation. The freezing and condensation temperature is -5℃ to -40℃, and the vacuum freeze-drying pressure is 10 to 400 Pa.

[0063] Smoke-generating section

[0064] The present invention provides a heated non-combustible smoke-generating section, comprising a paper tube and at least one smoke-generating aerogel sheet filled inside the paper tube. The smoke-generating aerogel sheet is rolled or bent, dividing the space inside the paper tube into multiple smoke channels extending longitudinally along the paper tube.

[0065] The smoke-generating aerogel sheet in the heated non-combustible smoke-generating section of this invention divides the space inside the paper tube into multiple smoke channels extending longitudinally along the paper tube. The smoke can travel unimpeded along these straight channels, resulting in low suction resistance in the smoke-generating section. Furthermore, the dimensions of the smoke channels can be adjusted according to actual needs to regulate the suction resistance.

[0066] In some embodiments of the present invention, the maximum width of the flue gas passage is 0.05–0.2 mm. The larger the maximum width of the flue gas passage, the smaller the suction resistance of the smoke-generating section.

[0067] In some embodiments of the present invention, the thickness of the smoke-generating aerogel sheet is 0.2 to 2 mm. The thinner thickness increases the overall specific surface area of ​​the heated non-combustible smoke-generating section, which allows the smoke to volatilize more fully.

[0068] In some embodiments of the present invention, the aerogel sheet is formed by slicing tobacco powder aerogel. During the slicing process, some closed-cell areas of the tobacco powder aerogel are cut open, forming through holes on the surface of the aerogel sheet. The present invention uses internal heating for the heated non-combustible smoke-generating section, that is, a heating needle is inserted into the section to heat from the core, generating smoke. The through holes on the surface of the aerogel sheet facilitate the movement of hot smoke between the sheets, quickly reaching the sheets radially away from the heating needle for heating, thus improving heat transfer efficiency.

[0069] In some embodiments of the present invention, the density of the aerogel sheet is 0.5–0.7 g / cm³. 3 The aerogel sheet containing smoke-generating material comprises 30wt% to 65wt% tobacco powder. The density of the aerogel sheet and the content of tobacco powder within the above range ensure that the heated non-combustible smoke-generating section has sufficient tobacco powder, thereby ensuring a sufficiently large smoke volume in the heated non-combustible smoke-generating section.

[0070] In some embodiments of the present invention, the diameter of the heated non-combustible smoke-generating section is 4-8 mm and the length is 7-28 mm.

[0071] In some embodiments of the present invention, the aerogel sheet further contains at least one of a preservative, tea powder, and traditional Chinese medicine powder.

[0072] Heated non-combustible smoke

[0073] The present invention provides a heated non-combustible smoke generator, comprising a heating needle and the aforementioned heated non-combustible smoke generator section, wherein the heating needle is inserted into the heated non-combustible smoke generator section along the length direction of the heated non-combustible smoke generator section.

[0074] Example

[0075] The technical solution of the present invention is described in detail below through examples. Unless otherwise specified, the raw materials, equipment, or solvents used are all common raw materials, equipment, or solvents on the market. Unless otherwise specified, the raw materials with the same name used in the following examples and comparative examples are the same raw materials. In the following examples, the hydrogel used is corn starch, the smoking agent is glycerol, the plant fiber is needle-leaf fiber with a length of 3-5 mm and a thickness of 40-60 micrometers, the preservative is potassium sorbate, and the water is deionized water. The tobacco powder used in the following examples is prepared by the following method: the spindle speed of the pulverizer is set to 2800 r / min, tobacco leaves with a particle size of about 12 mm are pulverized, and tobacco powder with two particle size ranges of 20-40 mesh and 80-120 mesh is sieved out.

[0076] Example 1

[0077] This embodiment provides a method for producing a heated, non-combustible smoke-generating section, including the following steps:

[0078] First, weigh 10g of 20-40 mesh tobacco powder and 40g of 80-120 mesh tobacco powder according to the weights shown in Table 1, and mix them evenly.

[0079] The second step is to weigh 3g of corn starch and 1g of sodium carboxymethyl cellulose thickener, add them to 100ml of water, stir well, heat in a water bath to 90℃, and stir for 1 hour to obtain adhesive solution A.

[0080] The third step is to cool the mixed adhesive solution A to 30°C.

[0081] Fourth step: Add 14g of fumigant and 0.2g of preservative to the cooled adhesive solution and stir to obtain adhesive solution B.

[0082] Fifth step: Add the mixed tobacco powder to the obtained gel solution B and stir thoroughly to obtain tobacco powder hydrogel.

[0083] Step 6: Apply the tobacco powder hydrogel multiple times on a flat plate to form a wet block of tobacco powder hydrogel with a thickness of 1.5 mm, a length of 600 mm, and a width of 600 mm.

[0084] Step 7: Freeze-condense the wet block of tobacco powder hydrogel at -20℃, and then put it into a vacuum freeze-drying oven at 10Pa and -40℃ for vacuum freeze-drying to obtain a tobacco powder aerogel with a thickness of 2mm. Remove it from the surface of the plate.

[0085] Step 8: Cut the tobacco powder aerogel into 0.5mm thick slices perpendicular to the thickness direction to obtain tobacco aerogel slices.

[0086] Step 9: Stack the three aerogel sheets together and roll them into a long cylinder with a diameter of 8mm.

[0087] Step 10: Cut the long cylinder into smaller cylinders of fixed length.

[0088] The eleventh step is to wrap a paper tube around the short cylinder to obtain a heated, non-combustible, smoke-generating section.

[0089] Example 2

[0090] This embodiment provides a method for producing a heated, non-combustible smoke-generating section, which is the same as that in Example 1 except for the content of plant fiber.

[0091] Example 3

[0092] This embodiment provides a method for producing a heated non-combustible smoke-generating section. Except for the particle size composition of the tobacco powder, which is different from that in Embodiment 1, the other steps and parameters are the same as in Embodiment 1.

[0093] Example 4

[0094] This embodiment provides a method for producing a heated non-combustible smoke-generating section. Except for the content of the smoke-generating agent, the other steps and parameters are the same as in Example 1.

[0095] Example 5

[0096] This embodiment provides a method for producing a heated non-combustible smoke-generating section, which is the same as that in Example 1 except that the thickness of the tobacco powder aerogel is different from that in Example 1.

[0097] Table 1. Raw material composition and product test results of Examples 1-5

[0098]

[0099] As shown in Table 1, the heated non-combustible smoke-generating section produced in Example 1 has a small pressure drop, moderate smoke volume, and is not prone to flaking after inhalation; the heated non-combustible smoke-generating section produced in Example 2 is prone to flaking due to the low content of added plant fiber; the heated non-combustible smoke-generating section produced in Example 3 has a low sheet utilization rate due to the addition of only large-mesh tobacco powder, because high-mesh tobacco powder easily leads to high aerogel density, low porosity, and poor heat transfer; the heated non-combustible smoke-generating section produced in Example 4 has a small smoke volume due to the low content of smoke-generating agent; the heated non-combustible smoke-generating section produced in Example 5 has a small smoke volume due to the thicker thickness of the smoke-generating aerogel sheet, presumably because a thinner smoke-generating aerogel sheet has more through-pores, a larger specific surface area, and allows hot smoke to pass more smoothly through the smoke-generating aerogel sheet, thus resulting in better heating efficiency and ultimately a higher smoke volume.

[0100] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for producing a heated, non-combustible smoke-generating section, characterized in that, Includes the following steps: A tobacco powder hydrogel is provided; the tobacco powder hydrogel includes at least a hydrogel, tobacco powder, a smoking agent, plant fiber and water; the tobacco powder is composed of 20-40 mesh tobacco powder and 80-120 mesh tobacco powder, and the weight ratio of 20-40 mesh tobacco powder to 80-120 mesh tobacco powder is 1:4-6. Tobacco powder hydrogel is coated onto a mold, frozen and solidified, and then vacuum freeze-dried to obtain tobacco powder aerogel; the thickness of the tobacco powder aerogel is 1mm~15mm. The tobacco powder aerogel is sliced ​​thinly to obtain smoke-generating aerogel sheets. The thickness of the smoke-generating aerogel sheets is 0.2~2mm, and the density of the smoke-generating aerogel sheets is 0.5~0.7g / cm³. 3 The aerogel sheet contains 30wt% to 65wt% tobacco powder; Fold the aerogel sheet into a long cylinder; The long cylinder is cut short to form a short cylinder of a predetermined length; A paper tube is wrapped around a short cylinder. The aerogel sheet is rolled or bent, dividing the space inside the paper tube into multiple aerogel channels that extend longitudinally along the paper tube.

2. The production method of the heated non-combustible smoke-generating section according to claim 1, characterized in that: The method for rolling the aerogel sheet into a long cylinder is as follows: (i) Stacking multiple sheets of aerogel and rolling them into a long cylindrical roll; or, (ii) Rolling a single sheet of aerogel into a long, cylindrical roll; or, (iii) Bend one or more sheets of smoke-generating aerogel into a long cylinder.

3. The method for producing the heated, non-combustible smoke-generating section according to claim 1, characterized in that: The length and width of the tobacco powder aerogel are 300~700mm.

4. A heated non-combustible smoke-generating section obtained by the production method of the heated non-combustible smoke-generating section according to claim 1, characterized in that, It includes a paper tube and at least one aerogel sheet filled inside the paper tube, the aerogel sheet being rolled or bent, dividing the space inside the paper tube into multiple aerogel channels extending longitudinally along the paper tube.

5. The heated non-combustible smoke-generating section according to claim 4, characterized in that: The width of the flue gas passage is 0.05~0.2mm.

6. The heated non-combustible smoke-generating section according to claim 4, characterized in that: The aerogel sheet also contains at least one of the following: preservative, tea powder, and traditional Chinese medicine powder.

7. A type of heated non-combustible smoke, characterized in that: It includes a heating needle and a non-combustible smoke-generating section as described in any one of claims 4 to 6, wherein the heating needle is inserted into the non-combustible smoke-generating section along its length.

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