Coating for enhancing aroma and preventing cut tobacco of heated cigarette from falling off, cigarette paper and heated cigarette

Abstract

The invention discloses a coating for enhancing aroma and preventing tobacco shreds of a heated cigarette from falling off, cigarette paper and the heated cigarette, and the coating is prepared from plant raw materials through the following method: (1) carrying out high-temperature pyrolysis reaction on the plant raw materials to obtain a pyrolysis semi-coke composition and a volatile composition; and (2) condensing the volatile composition to obtain the coating. Coating the coating on the inner surface of a paper base material to form cigarette paper, wherein the cigarette paper is used in a heated cigarette; in the smoking state of the heated cigarette, the temperature of smoke generated by heating is transmitted to the coating layer, so that the coating layer is bonded with the aerosol generating matrix, and the aroma enhancement is realized and the aerosol generating matrix in the heated cigarette is prevented from falling off. Moreover, peculiar smell cannot be generated, the falling rate of the fuming substrate is reduced, and the fuming substrate cannot be adhered to the heating body of the heating smoking set, so that the service life of the heating body and the heating smoking set is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of heated cigarettes and cigarette paper, and particularly relates to a coating for enhancing flavor and preventing heated cigarette shreds from falling, cigarette paper and heated cigarettes. Background Art

[0002] Heated cigarettes, due to their low levels of harmful substances and minimal health risks, have become a hot topic of research in the tobacco industry. Center-heated cigarettes, such as Philip Morris International's IQOS series and Han Tobacco's Lil series, are a mainstream product on the market. These devices utilize a heating element inserted into the center of the cigarette's smoky section, heating the thin sheet through resistance heat to release smoke. Inserting and removing the cigarette are two essential steps when using these devices.

[0003] When smoking a heated cigarette, the smoking matrix undergoes a certain degree of thermal cracking after a few minutes of heating. This causes the smoking matrix, which is primarily composed of tobacco, to shrink and reduce in volume, causing it to separate from the cigarette paper. This loss of friction when the cigarette is removed makes it more likely for the tobacco to separate from the cigarette paper. This problem is exacerbated when the heated cigarette is removed, making it impossible to remove the heated cigarette completely. Furthermore, the fallen smoking matrix can remain in the heating chamber of the heated cigarette device, making cleaning difficult and significantly reducing the consumer's smoking experience. In heated cigarette devices with needle- or sheet-type heaters, the smoking matrix is ​​also prone to adhesion to the heater after heating, resulting in an uneven surface and uneven heating of the smoking matrix within the heated cigarette. This can affect the release of smoke from the smoking matrix and may even produce harmful substances, affecting the purity and quality of the smoke. Long-term adhesion can also lead to corrosion of the heater, shortening the service life of the heated cigarette device.

[0004] Currently, there are studies that apply glues such as water-based adhesives to the inner surface of cigarette paper to force tobacco shreds to adhere to the cigarette paper. For example, patent document CN119800775A discloses cigarette paper and aerosol-generating products. These products adhere accelerator particles to the cigarette paper through an adhesive coating. The adhesive coating contains an adhesive that primarily fixes the accelerator particles, thereby reducing the moisture content in the smoke. However, this method still fails to solve the problem of tobacco shreds falling off. Patent document CN116804316A discloses heat-not-burn cigarette paper. This method is prepared by adding an adhesive and forming the cigarette paper in one step. However, after heating, the viscosity of the adhesive decreases significantly and produces an odor, affecting the taste of the smoke. Therefore, the problem of shredded tobacco cannot be effectively solved, and the consumer experience is poor. Patent document with publication number CN113638265A discloses a cigarette paper coating liquid, which increases the aroma and smoking experience by coating the cigarette paper of cigars. However, compared with heated cigarettes, it does not provide any technical inspiration for preventing tobacco from falling.

[0005] Therefore, it is necessary to design a new type of cigarette paper. When the heated cigarette is heated and smoked using a heated smoking device, it can increase the aroma of the smoke without producing any odor, and at the same time, the smoking matrix and the cigarette paper can be tightly connected. After the smoking is completed, the heated cigarette can be completely pulled out of the heated smoking device, and the smoking matrix will not fall off or stick to the heating body of the heated smoking device. Summary of the Invention

[0006] The purpose of the present invention is to design a new cigarette paper. When a heated cigarette is heated and smoked using a heated smoking device, the cigarette paper can increase the aroma of the smoke without producing any odor, and at the same time, the smoking matrix is ​​tightly connected to the cigarette paper. After smoking is completed, the heated cigarette can be completely pulled out of the heated smoking device without the smoking matrix falling off or sticking to the heating body of the heated smoking device.

[0007] To solve the above technical problems:

[0008] In one aspect, the present invention provides a coating for enhancing flavor and preventing heated cigarette tobacco from falling. The coating is prepared from plant raw materials by the following method:

[0009] (1) using plant raw materials to perform high-temperature pyrolysis reaction to obtain a cracked semi-coke composition and a volatile composition;

[0010] (2) Condensing the volatile composition to obtain a coating.

[0011] Furthermore, the plant raw material is a plant powder obtained by grinding, and the plant powder is tobacco powder and / or non-tobacco plant powder. Tobacco plants include tobacco leaves and / or tobacco stems; non-tobacco plants are plants with a distinctive aroma, including one or more of mint, kudzu root, cloves, sandalwood, rose, lotus leaf, chrysanthemum, jasmine, tangerine peel, walnut shell, coffee, tea, agarwood, hawthorn, licorice, cocoa, wood ear, lotus seed, apple powder, strawberry powder, pear powder, and ginger. These non-tobacco plants have a unique aroma that can improve the odor of cigarette paper during the heating process without introducing other odors. They are particularly effective in improving the woody note released by the outer layer of the cigarette paper during the heating process of heated cigarettes.

[0012] In some preferred embodiments, non-tobacco plant powder and tobacco plant powder can be mixed or used alone as raw materials for the high-temperature pyrolysis reaction in step (2). More specifically, when non-tobacco plant powder and tobacco plant powder are mixed, the weight ratio of tobacco plant powder to non-tobacco plant powder can be any value between (0.1-10):1, for example (0.1-1.0):1, (1.0-3.0):1, (3.0-5.0):1, (5.0-8.0):1 or (8.0-10.0):1. Optionally, the ratio can be adjusted according to actual needs. Different ratios can adjust the smoke flavor, enhance the stickiness effect, and effectively reduce the woody smell of cigarette paper during burning or heating, thereby improving the smoking quality.

[0013] Furthermore, the average particle size of the plant powder is 100-350 mesh, for example, 100-200 mesh, 200-250 mesh, 250-300 mesh or 300-350 mesh.

[0014] Optionally, the average particle size of the plant powder may also be 400-800 meshes. Plant powder within this particle size range can more fully release the active ingredients and is more suitable for the high-temperature pyrolysis reaction in step (2).

[0015] Furthermore, the reaction temperature of the high-temperature pyrolysis is 300-600°C, the reaction time is 10-30 minutes, and the reaction atmosphere is an inert atmosphere; the inert atmosphere is nitrogen, argon or helium; the temperature of the volatile composition condensation is -15-5°C, and the viscosity of the obtained coating is 50-700 mPa·s and the density is 1.05-1.20 kg / dm 3 .

[0016] Another aspect of the present invention provides a cigarette paper for heating cigarettes; the cigarette paper comprises a paper substrate and the coating as described above.

[0017] Furthermore, the coating constitutes a coating layer. When the heated cigarette is inhaled, the heating temperature is greater than or equal to 250°C, and the generated smoke is transferred to the coating layer to make the coating layer bonded to the aerosol-generating matrix in the heated cigarette, thereby achieving flavor enhancement and preventing the aerosol-generating matrix in the heated cigarette from falling off.

[0018] Furthermore, the coating layer can be connected to the paper substrate by spraying, printing, dipping, pressing or bonding.

[0019] Furthermore, the coating area is 20% or more of the inner surface area of ​​the paper substrate in the cigarette paper, that is, 20% or more of the inner surface area of ​​the smoking part of the heated cigarette wrapped in the cigarette paper; the coating amount is 30 to 200 mg / cm 3 .

[0020] Optionally, the coating can be applied by dotting or spraying. Preferably, the coating is sprayed onto the inner surface of the paper substrate to form a coating layer that is tightly connected to the inner surface of the paper substrate.

[0021] Furthermore, the coating layer includes a water-insoluble pyrolysis derivative of lignin and a cross-linked product; the water-insoluble pyrolysis derivative of lignin can undergo a cross-linking polymerization reaction with the cross-linked product to bond the coating layer to the aerosol to generate a matrix.

[0022] Furthermore, the content of water-insoluble lignin pyrolysis derivatives in the coating layer is greater than or equal to 15% of the total amount of water-insoluble lignin pyrolysis derivatives and other complexes; the water-insoluble lignin pyrolysis derivatives include phenol derivatives, lipid derivatives and sugar derivatives; other complexes include carboxylic acids, aldehydes, furan, furan derivatives, levoglucosan and ethanol; among them, the content of levoglucosan is greater than or equal to 20%; the content of ethanol is less than or equal to 20%.

[0023] Furthermore, the coating is in a stable liquid state after condensation, and the coating is applied during the cigarette paper wrapping process of the heated cigarette.

[0024] Preferably, the coating is coated on the inner surface of the paper substrate of the cigarette paper before the rolling process; optionally, the coating is stored in a separate coating bin and coated on the inner surface of the paper substrate of the cigarette paper through a pipe and a discharge port, the coating discharge port is arranged on the inner surface of the paper substrate of the cigarette paper 1, and during the rolling process, the coating is evenly coated on the paper substrate of the transmitted cigarette paper 1 through a nozzle; optionally, the coating bin and the pipe are provided with a heating function (preferably 40-60°C), and the coating bin is also provided with a stirring function, which can improve the fluidity of the heavy components in the coating, ensure the uniformity between all components of the coating, and ensure the adhesive performance during the smoking process.

[0025] As an option, the larger the coating area, the better the adhesion effect between the aerosol-generating matrix in the heated cigarette and the cigarette paper 1 during smoking, the better the flavoring effect, and the more compact the aerosol-generating matrix in the heated cigarette is, and the less likely it is to fall off.

[0026] Furthermore, the paper base material of the cigarette paper also includes an outer layer and / or an anti-seepage layer; the anti-seepage layer is used to prevent the coating from seeping out of the outer surface of the cigarette paper; the anti-seepage layer is arranged on the outer surface of the outer layer or between the outer layer and the coating layer; the anti-seepage layer includes anti-seepage paper and / or an anti-seepage coating, the anti-seepage paper includes aluminum foil, tin foil or kraft paper; the anti-seepage coating includes polypropylene, polyacrylate, polytetrafluoroethylene, chitosan or silica.

[0027] Furthermore, the outer layer includes bamboo fiber and wood pulp fiber. The combination of bamboo fiber and wood pulp fiber in a certain ratio gives the cigarette paper a certain tensile strength. Bamboo fiber is a cellulose fiber extracted from naturally grown bamboo. This prevents the cigarette paper from being damaged during the heated cigarette packaging process.

[0028] Optionally, the bamboo fiber is prepared using paper-grade bamboo pulp with an average degree of polymerization greater than 1000 as a raw material using a bamboo fiber preparation process well known to those skilled in the art.

[0029] Optionally, the wood pulp fiber is generally softwood pulp fiber and / or hardwood pulp fiber, for example including but not limited to poplar pulp fiber, green poplar pulp fiber, fast-growing poplar pulp fiber, masson pine pulp fiber, larch pulp fiber, red pine pulp fiber, spruce pulp fiber, birch pulp fiber, basswood pulp fiber, eucalyptus pulp fiber, maple pulp fiber. Preferably, the wood pulp fiber is selected from one or more of masson pine pulp fiber, larch pulp fiber, spruce pulp fiber, birch pulp fiber, poplar pulp fiber and maple pulp fiber. Wood pulp fiber has the advantages of high strength and strong plasticity. The addition of wood pulp fiber is conducive to improving the tensile strength performance of cigarette paper.

[0030] Optionally, the weight ratio of bamboo fiber to wood pulp fiber can be any value between (0.1-10.0):1, for example, including (0.1-0.3):1, (0.9-1.8):1, (1.8-4.0):1 or (4.0-10.0):1.

[0031] Optionally, the thickness of the cigarette paper can be any value between 0.05 and 0.4 mm, for example, 0.10 mm, 0.15 mm, 0.20 mm, 0.25 mm, 0.30 mm or 0.35 mm. The weight of the cigarette paper can be 80 to 400 g / m 2 Any value between, for example, 100g / m 2 , 150g / m 2 , 200g / m 2 , 250g / m 2 , 300g / m 2 or 350g / m 2 The density of cigarette paper can be 800~1200mg / cm 3 Any value between 850 mg / cm 3 , 900mg / cm 3 , 950mg / cm 3 、1000mg / cm 3 or 1100 mg / cm 3The ratio of the mass of the cigarette paper to the specific surface area of ​​the cigarette paper may be 0.06 to 0.20 mg / mm 2 Any value between 0.01 and 0.08 mg / mm 2 , 0.10mg / mm 2 , 0.12mg / mm 2 , 0.14mg / mm 2 , 0.16mg / mm 2 or 0.18 mg / mm 2 The transverse tensile strength of the cigarette paper can be any value between 300 and 1000 N / m, for example, 400 N / m, 500 N / m, 600 N / m, 700 N / m, 800 N / m, or 900 N / m. The longitudinal tensile strength of the cigarette paper can be any value between 300 and 1000 N / m, for example, 400 N / m, 500 N / m, 600 N / m, 700 N / m, 800 N / m, or 900 N / m.

[0032] Another aspect of the present invention provides a heated cigarette, which comprises the above-mentioned cigarette paper.

[0033] Furthermore, the heated cigarette sequentially comprises a smoking section, an intermediate composite section, and a filter section. The smoking section includes an aerosol-forming matrix, which is used to heat and atomize to generate smoke. The cigarette paper is wrapped around the outside of the smoking section. When the heated cigarette is heated to above 250°C, the water-insoluble lignin pyrolysis derivatives and cross-linked products in the coating layer on the cigarette paper further contact the aerosol-forming matrix and undergo a cross-linking polymerization reaction, thereby enhancing the flavor and preventing the aerosol-forming matrix from falling off. The forming paper is wrapped around the intermediate composite section and the filter section and then connected to the cigarette paper to form a heated cigarette.

[0034] In some preferred embodiments, the aerosol-forming substrate comprises tobacco.For example, the aerosol-forming material may be formed from a sheet of homogenised tobacco.

[0035] Alternatively or additionally, the aerosol-forming substrate may comprise a tobacco-free aerosol-forming material.

[0036] For example, the aerosol-forming material may be a sheet comprising nicotine salt and an aerosol former.

[0037] Alternatively or additionally, the aerosol-forming substrate may comprise a single aerosol-former.Alternatively, the aerosol-forming substrate may comprise a combination of two or more aerosol-formers.

[0038] Preferably, the aerosol-forming substrate has an aerosol-forming agent content of greater than 5% by dry weight. More preferably, the aerosol-forming substrate may have an aerosol-forming agent content of between about 5% and about 30% by dry weight. In one embodiment, the aerosol-forming substrate has an aerosol-forming agent content of about 20% by dry weight.

[0039] In the present invention, aerosol former is used to describe any suitable known compound or mixture of compounds which, in use, promotes the formation of an aerosol and which is substantially resistant to thermal degradation at the operating temperature of the aerosol-generating article.

[0040] Suitable aerosol formers are known in the art and include, but are not limited to, polyols such as propylene glycol, triethylene glycol, 1,3-butylene glycol, and glycerol; esters of polyols such as glycerol monoacetate, glycerol diacetate, or glycerol triacetate; and aliphatic esters of mono-, di-, or polycarboxylic acids such as dimethyl dodecanedioate and dimethyl tetradecanedioate. Preferred aerosol formers are polyols or mixtures thereof such as propylene glycol, triethylene glycol, 1,3-butylene glycol, and most preferably glycerol.

[0041] Preferably, the aerosol generating substrate comprises a solid aerosol-forming substrate which may comprise one or more of shreds, strips, rods or sheets comprising one or more of herb leaves, tobacco leaves, tobacco ribs, flat tobacco and homogenised tobacco.

[0042] Optionally, the solid aerosol-forming substrate may be provided on or embedded in a thermally stable carrier.

[0043] Optionally, the carrier may be in the form of chips, strips, bars or sheets.

[0044] Optionally, the solid aerosol-forming substrate may be disposed on the surface of the carrier in the form of, for example, a sheet, foam, gel or slurry.

[0045] Optionally, the aerosol-forming substrate may be in the form of a plug.

[0046] Optionally, the plug comprises an aerosol-forming material confined by paper or other wrapping material.Where the aerosol-forming substrate is in the form of a plug, the entire plug including any wrapping paper is considered to be the aerosol-forming substrate.

[0047] Preferably, the heated cigarette comprises an aerosol-forming substrate, a support element, an aerosol-cooling element and a filter rod segment, wherein the support element and the aerosol-cooling element form a middle composite segment, and the aerosol-forming substrate is concentrated to form a smoking portion.

[0048] Preferably, the aerosol-cooling element may have a thickness of approximately 300 mm per mm of length. 2 With each millimeter length about 1000mm 2 In a preferred embodiment the aerosol-cooling element has a total surface area of ​​approximately 500 mm per mm of length. 2 total surface area.

[0049] Preferably, the aerosol-cooling element has a low resistance to draw. That is, preferably, the aerosol-cooling element provides low resistance to air passing through the aerosol-generating article. Preferably, the aerosol-cooling element does not substantially affect the resistance to draw of the aerosol-generating article.

[0050] Preferably, the aerosol-forming substrate, support element, aerosol-cooling element, and filter plug segment are generally cylindrical and have substantially similar outer diameters. For example, they have an outer diameter of at least 5 mm. Preferably, they have an outer diameter of between about 5 mm and about 12 mm, such as between about 5 mm and about 10 mm, or between about 6 mm and about 8 mm. In a preferred embodiment, they have an outer diameter of 7.2 mm + / - 10%.

[0051] Preferably, the aerosol-forming substrate may have a length of between about 5 mm and about 15 mm, for example between about 8 mm and about 12 mm. In a preferred embodiment, the aerosol-forming substrate has a length of about 12 mm.

[0052] Preferably, the support element may comprise a hollow tubular element.The support element may be formed from any suitable material or combination of materials.

[0053] More preferably, the support element may be formed from one or more materials selected from the group consisting of: cellulose acetate; cardboard; curled paper, such as curled heat-resistant paper or curled parchment paper; and polymeric materials, such as low-density polyethylene (LDPE). In a preferred embodiment, the support element comprises a medium cellulose acetate tube.

[0054] Preferably, the filter rod segment can have a length between about 5 mm and about 20 mm. In a preferred embodiment, the filter rod segment has a length of about 14 mm. The filter rod segment can have a length between about 5 mm and about 14 mm. In a preferred embodiment, the filter rod segment has a length of about 7 mm.

[0055] The present invention can form a heated cigarette by wrapping the cigarette paper. When the heated cigarette is heated by a heated smoking device for consumers to smoke, the cigarette paper can increase the aroma of the smoke without generating odor, thereby improving the consumer's smoking experience; at the same time, the aerosol generating matrix is ​​closely connected with the cigarette paper; after the smoking is completed, the heated cigarette can be completely pulled out of the heated smoking device, and the smoking matrix will not fall off or stick to the heating element of the heated smoking device, which is convenient for cleaning, improves the consumer experience, and prolongs the service life of the heating element and the heated smoking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The above content and the following specific embodiments of the present invention will be better understood when read in conjunction with the accompanying drawings. It should be noted that the accompanying drawings are only examples of the technical solutions claimed.

[0057] Figure 1 This is a schematic structural diagram of the heated cigarette of the present invention;

[0058] Figure 2 This is a schematic structural diagram of the heating smoking device of the present invention;

[0059] Figure 3 This is a schematic diagram of the structure of the heated cigarette of the present invention;

[0060] Figure 4 This is a schematic structural diagram of cigarette paper in Example 1 of the present invention;

[0061] Figure 5 This is a schematic diagram of the structure of cigarette paper in Example 2 of the present invention;

[0062] Figure 6 This is a schematic structural diagram of cigarette paper in Example 3 of the present invention;

[0063] Figure 7 This is a schematic structural diagram of cigarette paper in Example 4 of the present invention.

[0064] The description of the accompanying drawings is as follows:

[0065] Cigarette paper: 1, 1a, 1b, 1c;

[0066] Outer cladding: 11, 11a, 11b;

[0067] Coating layers: 12, 12a, 12b, 12c;

[0068] Anti-seepage layer: 13a, 13b, 13c;

[0069] Forming paper: 2;

[0070] Heated cigarettes: 100;

[0071] Smoke Department: 110;

[0072] Support: 120;

[0073] Cooling unit: 130;

[0074] Filter unit: 140;

[0075] Heated smoking device: 200;

[0076] Battery and control components: 210;

[0077] Heating chamber: 220;

[0078] Heating element: 230. DETAILED DESCRIPTION

[0079] The detailed features and advantages of the present invention are described in detail below in the specific embodiments, and the content is sufficient to enable any person skilled in the art to understand the technical content of the present invention and implement it accordingly. Based on the description, claims and drawings disclosed in this specification, those skilled in the art can easily understand the relevant purposes and advantages of the present invention.

[0080] The present invention will now be described with reference to the accompanying drawings, in which like reference numerals refer to like elements. Although the specific structure and arrangement discussed, it should be understood that this is done merely for illustrative purposes. Those skilled in the art will appreciate that other structures and arrangements can be used without departing from the spirit and scope of the present invention. It will be clear to those skilled in the art that the present invention can also be used for various other applications.

[0081] In this specification and claims, various terms will be mentioned. Unless otherwise indicated, these terms will be defined as having the following meanings: The terms "including" or "having" have the same meaning as "comprising" as defined above, and also include other forms of the terms, such as the gerund form and the singular form in English, meaning including but not limited to, and are not intended to exclude, for example, other elements, components, integers or steps. The singular forms "a", "an" and "the" include the corresponding plural forms. "At least one" means one or more, and "a plurality" means two or more.

[0082] All other terms used herein that are not specifically defined in this patent are intended to have the general meanings understood by ordinary technicians in the field to which they belong, and in particular, ordinary technicians in the field can directly and unambiguously determine the meaning of how to implement the technical solution of this patent after reading the claims, description and drawings of this patent.

[0083] Even if there are incomplete descriptions, omissions or ambiguities in the grammar, text, punctuation, graphics, symbols, etc. in the claims, description and drawings of this patent, ordinary technicians in this field can still reach the only correct understanding by reading the claims, description and drawings as a whole without excessive reasoning or experimentation, and effectively exclude various incorrect understandings that are not aimed at achieving the purpose of this patent.

[0084] It should be understood that although the terms "inner surface", "outer surface", "upstream", "downstream", etc. may be used in the present invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. Without departing from the scope of the present invention, the first position may also be referred to as the second position, and similarly, the second position may also be referred to as the first position. Thus, the features defined as "upstream" and "downstream" may explicitly or implicitly include one or more of such features. "Upstream" refers to the upstream direction along the consumer's puffing direction, the end away from the consumer's mouth when puffing, and "downstream" refers to the downstream direction along the consumer's puffing direction, the end close to the consumer's mouth when puffing.

[0085] Example 1

[0086] The specific steps of the method for preparing the tobacco-proof flavored cigarette paper and heated cigarette in this embodiment are as follows:

[0087] S1. Coating preparation

[0088] (1) First, tobacco leaves as a plant raw material are ground into powder.

[0089] The tobacco leaves were washed to remove impurities on the surface of the tobacco leaves, and the washed tobacco leaves were dried in an oven to eliminate moisture in the tobacco leaves. The drying time was 3 h and the drying temperature was 90±5°C. The dried tobacco leaves were ground using a high-speed grinder (Xinnuo, DFT-300) and sieved using a 300-mesh sieve to obtain dried tobacco leaf powder.

[0090] (2) Next, 300 g of dried tobacco leaf powder was weighed using an ME204 electronic balance (sensitivity 0.0001 g, Mettler Toledo, USA) for high-temperature pyrolysis reaction.

[0091] Before conducting the high-temperature pyrolysis reaction, the airtightness of the reaction device is checked to ensure that the sealing of the experimental device meets the requirements. High-purity nitrogen (N2) is injected into the device, and the flow rate is maintained at 100mL / min. The air in the furnace is purged for 15 minutes to exhaust the air, ensuring that the pyrolysis experiment is carried out under nitrogen atmosphere conditions. In this embodiment, the equipment used for the high-temperature pyrolysis reaction is a high-temperature electric furnace (purchased from Sigma, SGM M500-12 model). The specific steps of the high-temperature pyrolysis reaction are: thermal cracking for 20 minutes at a temperature of 450°C and an inert atmosphere of nitrogen. During the high-temperature pyrolysis process, the tobacco powder is heated at a rate of 100°C / min to obtain a volatile composition and a cracked semi-coke composition. After the cracked semi-coke composition is discharged, it is filtered and collected for treatment. The volatile composition continues to enter the condensation system and condenses at -10°C to obtain a liquid volatile composition, which is coating #C1.

[0092] In other specific embodiments, other reactors may be used to perform the thermal cracking reaction on the dried tobacco leaf powder, such as a fixed bed reactor or a fluidized bed reactor. The inert atmosphere may also be argon or helium.

[0093] (3) Finally, coating #C1 was tested according to the national standard GB / T173-93, and the viscosity of coating #C1 was found to be 420 mPa·s and the density was 1.07 kg / dm3.

[0094] S2. Cigarette Paper Preparation

[0095] (1) The coating #C1 prepared above was loaded into a separate coating bin in a cigarette making machine.

[0096] (2) After starting the cigarette making machine, the heating and stirring functions of the coating chamber are turned on, and the heating temperature is 40°C, which is used to improve the fluidity of the heavy components in coating #C1 and ensure the uniformity among all components of coating #C1, thereby ensuring the sticky performance during the smoking process.

[0097] (3) The cigarette making machine transports the paper substrate from the conveying station to the coating station. The coating #C2 is transported to the discharge port through a pipe. The pipe is provided with a heating function. The heating temperature is the same as the heating temperature of the coating bin. The inner surface of the paper substrate is sprayed with coating #C1 at the coating station. The coating area of ​​coating #C1 is 20% of the inner surface area of ​​the paper substrate. The coating amount is 30 mg / cm3 to form cigarette paper 1 (cigarette paper #P1).

[0098] like Figure 1 As shown, the paper substrate in the cigarette paper 1 includes an outer covering layer 11 , and a coating layer 12 is coated on the inner surface of the outer covering layer 11 .

[0099] S3. Preparation of heated cigarettes

[0100] The cigarette paper 1 after being sprayed with the coating continues to enter the rolling station of the cigarette making machine.

[0101] like Figure 2 As shown, at the rolling station, the aerosol-generating matrix in the smoking portion 110 of the heated cigarette 100 is first wrapped with cigarette paper 1, rolled into shape, and cut; then connected to the support portion 120, the cooling portion 130, and the filter rod portion 140 in sequence, and wrapped with wrapping paper 2 on the outer surfaces of the support portion 120, the cooling portion 130, and the filter rod portion 140, wherein the radial length of the wrapping paper 2 is greater than the radial length of the support portion 120, the cooling portion 130, and the filter rod portion 140 after being connected in sequence, so that the wrapping paper 2 is connected to the cigarette paper #P1 and wraps at least 5% of the cigarette paper 1, thereby forming a heated cigarette 100 (heated cigarette #T1).

[0102] The smoking section 110 of the heated cigarette 100 is primarily composed of tobacco or reconstituted tobacco and can be referred to as the tobacco section. The support section 120 and the cooling section 130 both serve as cooling filter rod segments, which, together with the filter section 140 at the mouth end, can be referred to as the filter rod segment. The filter section 140 is located downstream of the heated cigarette 100, i.e., at the end closest to the consumer's inhalation. The smoking section 110 is located upstream of the heated cigarette 100, i.e., at the end further from the consumer's inhalation. The coating layer 12 is located near the end of the smoking section 110 containing the aerosol-generating matrix, while the outer layer 11 is located at the end further from the aerosol-generating matrix.

[0103] like Figure 3-4 As shown, the heated cigarette 100 prepared in this embodiment can be heated by a heating device 200. The heating device 200, also known as an aerosol-generating device, is configured to receive the heated cigarette 100 so that the smoking portion 110 of the heated cigarette 100 generates aerosol. The heating device 200 includes a housing, a battery and control assembly 210, a heating chamber 220 for receiving at least a portion of the heated cigarette 100, and a circumferentially heated heating body 230. The heating device 200 and the heated cigarette 100 inserted therein constitute an aerosol-generating system. The heating temperature of the heating device 200 is greater than or equal to 250°C. The coating layer 12 on the cigarette paper 1 adheres to the aerosol-generating matrix in the smoking portion 110, enhancing flavor and preventing tobacco from falling when the heated cigarette 100 is removed from the heating device 200 after puffing.

[0104] Example 2

[0105] The difference from Example 1 is that the plant raw materials used to prepare the coating in this example are different, and the coating area and coating amount are different.

[0106] In this embodiment, the plant raw material used is mint for high-temperature pyrolysis reaction, and the equipment used is a high-temperature electric furnace.

[0107] The specific steps of the high-temperature pyrolysis reaction are as follows: thermal cracking is carried out at a temperature of 500°C under an inert atmosphere of nitrogen for 15 minutes. The tobacco powder is heated at a rate of 150°C / min during the high-temperature pyrolysis process to produce a volatile composition and a pyrolysis char composition. The pyrolysis char composition is discharged and filtered for collection and treatment. The volatile composition continues to enter the condensation system and condenses at -15°C to obtain a liquid volatile composition, which is coating #C2.

[0108] The viscosity of coating #C2 was tested according to the national standard GB / T173-93, and the viscosity of coating #C2 was 508mPa·s and the density was 1.09kg / dm 3 .

[0109] S2. Cigarette Paper Preparation

[0110] (1) The coating #C2 prepared above was loaded into a separate coating bin in a cigarette making machine.

[0111] (2) After starting the cigarette making machine, the heating and stirring functions of the coating chamber are turned on, and the heating temperature is 50°C, which is used to improve the fluidity of the heavy components in coating #C2 and ensure the uniformity among all components of coating #C2, thereby ensuring the sticky performance during the smoking process.

[0112] (3) The cigarette making machine transports the paper substrate from the conveying station to the coating station. The coating #C2 is transported to the discharge port through a pipe. The pipe is equipped with a heating function. The heating temperature is the same as the heating temperature of the coating bin. The inner surface of the paper substrate is sprayed with coating #C2 at the coating station. The coating area of ​​coating #C2 is 25% of the inner surface area of ​​the paper substrate, and the coating amount is 35 mg / cm 3 , to form cigarette paper 1 (cigarette paper #P2).

[0113] S3. Preparation of heated cigarettes

[0114] The method for preparing the heated cigarette in this embodiment is the same as that in the above-mentioned embodiment 1, and a heated cigarette #T2 is obtained.

[0115] Example 3

[0116] The difference from Example 1 is that the plant raw materials used to prepare the coating in this example are different, and the coating area and coating amount are different.

[0117] In this embodiment, the plant raw materials used are tobacco plants and non-tobacco plants mixed in a ratio of 1:1; wherein the tobacco plants are tobacco leaves and the non-tobacco plants are mints for high-temperature pyrolysis reaction, and the equipment used is a high-temperature electric furnace.

[0118] The high-temperature pyrolysis reaction involves pyrolysis at 550°C for 10 minutes under a nitrogen inert atmosphere. The tobacco powder is heated at a rate of 200°C / min during the pyrolysis process, producing a volatile composition and a pyrolysis char composition. The pyrolysis char composition is then filtered and collected for processing. The volatile composition then enters a condensation system, where it condenses at -5°C to produce a liquid volatile composition, which is coating #C3.

[0119] The viscosity of coating #C3 was tested according to the national standard GB / T173-93. The viscosity of coating #C3 was 518 mPa·s and the density was 1.15 kg / dm 3 .

[0120] S2. Cigarette Paper Preparation

[0121] (1) The coating #C3 prepared above was loaded into a separate coating bin in a cigarette making machine.

[0122] (2) After starting the cigarette making machine, the heating and stirring functions of the coating chamber are turned on, and the heating temperature is 60°C, which is used to improve the fluidity of the heavy components in coating #C3 and ensure the uniformity among all components of coating #C3, thereby ensuring the sticky performance during the smoking process.

[0123] (3) The cigarette making machine transports the cigarette paper from the conveying station to the coating station. The coating #C3 is transported to the discharge port through a pipe. The pipe is equipped with a heating function. The heating temperature is the same as the heating temperature of the coating bin. The inner surface of the paper substrate is sprayed with coating #C3 at the coating station. The coating area of ​​coating #C3 is 20% of the inner surface area of ​​the paper substrate, and the coating amount is 30 mg / cm 3 , to form cigarette paper 1 (cigarette paper #P3).

[0124] S3. Preparation of heated cigarettes

[0125] The preparation method of the heated cigarette in this embodiment is the same as that in the above-mentioned embodiment 1, and a heated cigarette #T3 is obtained.

[0126] Example 4

[0127] The coating #C1 in Example 1 was used to prepare cigarette paper #P4 and heated cigarette #T4, using the same preparation method as in Example 1.

[0128] like Figure 5As shown, cigarette paper 1a (cigarette paper #P4) comprises a paper substrate and a coating layer 12a. The paper substrate comprises an outer layer 11a and an impermeable layer 13a. Coating layer 12a is located on the inner surface of outer layer 11a and is formed by spraying coating #C1. Impermeable layer 13a is located on the outer surface of outer layer 1a. In other words, cigarette paper 1a is composed of outer layer 11a, coating layer 12a, and impermeable layer 13a, connected in sequence. Coating layer 12a is located on the end of the aerosol-generating substrate closest to the smoking section 110, while impermeable layer 13a is located on the end of the aerosol-generating substrate farther from the smoking section 110.

[0129] The anti-seepage layer 13a is an anti-seepage paper, which is aluminum foil, and is used to prevent the sticky substance generated after the cigarette paper 1a is heated from penetrating to the outer surface of the cigarette paper 1a.

[0130] In other specific embodiments, the anti-seepage paper may also be tin foil or kraft paper. The anti-seepage coating comprises polypropylene, polyacrylate, polytetrafluoroethylene, chitosan or silicon dioxide.

[0131] Example 5

[0132] The coating #C1 in Example 1 was used to prepare cigarette paper #P5 and heated cigarette #T5. The preparation method was the same as that in Example 1.

[0133] like Figure 6 As shown, cigarette paper 1b (cigarette paper #P5) comprises a paper substrate and a coating layer 12b. The paper substrate comprises an outer layer 11b and an impermeable layer 13b. Coating layer 12a is located on the inner surface of outer layer 11b and is formed by spraying coating #C1. Impermeable layer 13b is located between outer layer 1b and coating layer 12b. In other words, cigarette paper 1b is constructed by sequentially connecting outer layer 11b, impermeable layer 13b, and coating layer 12b. Coating layer 12b is located at the end of the aerosol-generating substrate closest to the smoking section 110, while outer layer 11b is located at the end of the aerosol-generating substrate farther from the smoking section 110.

[0134] The anti-seepage layer 13b is an anti-seepage paper, which is aluminum foil, and is used to prevent the sticky substance generated after the cigarette paper 1b is heated from penetrating to the outer surface of the cigarette paper 1b.

[0135] In other specific embodiments, the anti-seepage layer 13b may be an anti-seepage coating, i.e., the coating method is the same as the coating method of coating #C1, and the anti-seepage coating can be polypropylene, polyacrylate, polytetrafluoroethylene, chitosan, or silicon dioxide. In other specific embodiments, the anti-seepage paper can be tinfoil or kraft paper.

[0136] Example 6

[0137] The coating #C1 in the above-mentioned Example 1 was used to prepare cigarette paper #P6 and heated cigarette #T6. The preparation method was the same as that in Example 1.

[0138] like Figure 7 As shown, cigarette paper 1c (cigarette paper #P6) comprises a paper base and a coating layer 12c, which includes an impermeable layer 13c. Coating layer 12c is located on the inner surface of impermeable layer 13c and is formed by spraying coating #C1. Coating layer 12c is applied to the end of the aerosol-generating substrate near the smoking section 110, while impermeable layer 13c is applied to the end of the aerosol-generating substrate away from the smoking section 110.

[0139] The anti-seepage layer 13c is an anti-seepage paper, which is aluminum foil, and is used to prevent the sticky substance generated after the cigarette paper 1c is heated from penetrating the outer surface of the cigarette paper 1c. In other specific embodiments, the anti-seepage paper can be tin foil or kraft paper.

[0140] Comparative Example 1

[0141] Compared with Example 1, the coating area of ​​the first coating is 10% of the surface area of ​​the smoke generating part, and the coating amount is 20 mg / cm 3 , and the heated cigarette is packaged by a cigarette making machine to obtain the heated cigarette @T1.

[0142] Comparative Example 2

[0143] Compared with Example 1, this comparative example uses white emulsion for cigarettes for spraying to form a coating layer, which is then rolled and packaged by a cigarette-making machine to obtain heated cigarettes, which are marked as heated cigarettes @ T2.

[0144] Comparative Example 3

[0145] Compared with Example 1, this comparative example uses a commercially available finished heated cigarette COO 01, which is marked as heated cigarette @T3.

[0146] Test Example 1: Tobacco Drop Test

[0147] The reconstituted tobacco in the commercially available finished heated cigarette COO 01 was used as the aerosol-generating substrate in this test example. The post-puff extraction experiment was conducted using the heated cigarettes described in Examples 1, 2, 3, 4, 5, 6, Comparative Examples 1, 2, and 3. The specific steps are as follows:

[0148] (1) Take the heated cigarettes #T1-T6 from Examples 1-6 and the heated cigarettes @T1-@T3 from Comparative Examples 1-3, with a total of 25 heated cigarettes per group (each group was set up in parallel with five technical replicates, with each technical replicate consisting of five heated cigarettes). The heated cigarettes were placed in a constant temperature and humidity chamber, maintaining equilibrium at 25°C / 60% humidity for 4 hours. The aerosol-forming substrate of at least five heated cigarettes was weighed using an electronic balance, and the average weight m0 of the heated cigarette aerosol-forming substrate was calculated and recorded. The cigarettes were then placed on a heated smoking device for simulated smoking.

[0149] (2) After the simulated puffing is completed, the heated cigarettes #T1 to T6 and heated cigarettes @T1 to @T3 are placed together on a small tensile testing device (refer to the patent document with publication number CN117607338A) and the cigarettes are pulled out at a speed of 200 mm / min. The pulled-out cigarettes are collected and sealed for storage.

[0150] (3) Weigh the weight m1 of the remaining aerosol-forming matrix in each heated cigarette in each group after extraction and record it.

[0151] (4) Calculate the fiber drop rate respectively. The lower the fiber drop rate, the better the surface cigarette removal effect.

[0152] The formula for the amount of dropped silk is: m(mg)=m0-m1;

[0153] The formula for the drop rate is:

[0154] The results, as shown in Table 1, show that the average tobacco shedding rate for heated cigarettes #T1 to #T6 was less than 2.0%, while the average shedding rate for heated cigarette @T1 was 13.4%, the average shedding rate for heated cigarette @T2 was 45.7%, and the average shedding rate for heated cigarette @T3 was 60.3%. The results demonstrate that when the coating provided in this application is sprayed onto the inner surface of a paper substrate, with the coating amount accounting for 20% or more of the inner surface area of ​​the paper substrate, the heated cigarettes produced after wrapping exhibit no tobacco shedding. Furthermore, when heated to above 250°C in a heated smoking device, the cigarette paper can bond to the aerosol-generating matrix within the smoking section through the coating layer, significantly reducing the shedding of the aerosol-generating matrix in the heated cigarettes.

[0155] Table 1 Statistics of average fiber drop rate

[0156]

[0157] Test Example 2: Inhalation Test

[0158] Conduct a puff test according to the evaluation method and record the final data. Cigarette tasters used MOK FWRD heating devices for heated puffs. Referencing "GB5606.4-2005 Cigarettes - Part 4 Sensory Technical Requirements," "YC / T564-2018 Sensory Evaluation Method for Chinese-Style Cigarettes Based on Consumer Experience," and "YC / T 497-2014 Sensory Evaluation Method for Chinese-Style Cigarette Style," key evaluation indicators were developed based on the smoke characteristics of heated cigarettes. Sensory evaluations were conducted and scores were recorded according to Table 2.

[0159] According to smoking test results, cigarette paper prepared by spraying the coating described in this application on the inner surface of a paper substrate and then adding the coating of the present invention to the paper exhibited a mellow smoke flavor, strong punch, rich and abundant aroma, smooth smoke flow, good clumping, a sweet aftertaste, significant masking of contaminants, and a pleasant, clean aftertaste. The overall smoking test score of the present invention's cigarettes was significantly improved compared to the original cigarettes (Comparative Example 3), while the use of the cigarette glue (Comparative Example 2) had a negative impact on the smoking experience.

[0160] Table 2 Sensory quality scores

[0161] Sensory quality index (total score) #T1 #T2 #T3 #T4 #T5 #T6 @T1 @T2 @T3 Glossy (5.0.) 5.0 5.0. 5.0 5.0 5.0 5.0 5.0 5.0 5.0 Aroma (32.0) 31.5 31.5 32.0 31.5 31.5 31.5 31.0 27.5 28.0 Harmony (6.0) 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 Miscellaneous gas (12.0) 10.0 10.0 9.5 10.0 10.0 10.5 10.0 9.0 10.0 Irritation (20.0) 18.0 18.0 18.0 18.0 18.0 18.0 17.5 17.0 17.0 Aftertaste (25.0) 23.0 23.0 23.0 23.0 23.0 23.0 22.0 21.0 21.0 Total score (100.0) 92.5 92.5 92.5 92.5 92.5 93.0 90.5 84.5 87.0

[0162] Also can utilize other tobacco plants and / or non-tobacco plants as raw material to carry out the preparation of coating according to the method recorded in above-described embodiment, tobacco plants comprise tobacco stems, and other non-tobacco plants are plants with fragrance.For example, other non-tobacco plants are one or more of kudzu root, cloves, sandalwood, rose, lotus leaf, chrysanthemum, jasmine, dried orange peel, walnut shell, coffee, tea, agarwood, hawthorn, liquorice, cocoa, fungus, lotus seed, apple powder, strawberry powder, pear powder and zingiber officinale.These non-tobacco plants have special fragrance, can improve the smell of cigarette paper 1 in heating process, and can not introduce other peculiar smells.In some preferred embodiments, non-tobacco plant powder is cloves, sandalwood, rose or chrysanthemum, and it is more effective for the improvement of the woody smell that paper substrate releases in cigarette paper 1 in heating process for heating cigarette 100.

[0163] It can be concluded that the present invention can form heated cigarettes by wrapping the cigarette paper. When the heated cigarette is heated by a heating device for consumers to smoke, the cigarette paper can increase the aroma of the smoke without generating odor, thereby improving the consumer's smoking experience. At the same time, the aerosol generating matrix is ​​closely connected to the cigarette paper. After the smoking is completed, the heated cigarette can be completely pulled out of the heating device, and the smoking matrix will not fall off or stick to the heating body of the heating device, thereby extending the service life of the heating body and the heating device.

[0164] Throughout this specification, references to "one embodiment" or "another embodiment" mean that a particular feature, structure, or characteristic described in connection with that embodiment / embodiment is included in at least one embodiment / embodiment of the present invention. Therefore, appearances of the phrase "in one embodiment / embodiment" throughout this specification do not necessarily refer to the same embodiment / arrangement, but rather to a variety of possible embodiments / arrangements. Furthermore, particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments / arrangements, as would be apparent to one of ordinary skill in the art from this disclosure.

[0165] Similarly, it should be understood that in the above description of exemplary embodiments / embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment / embodiment or its drawings and description for the purpose of simplifying the disclosure and aiding understanding of one or more of the various inventive aspects. However, except for expressly stated contrary guidance or obvious technical contradiction or exclusion, the description method of this patent should not be interpreted as reflecting an intention that the claimed invention requires more features than expressly stated in each claim. Instead, the claims reflect that the inventive aspects lie in less than all features of a single aforementioned disclosed embodiment / embodiment. Therefore, the claims that follow the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment / embodiment of the invention.

[0166] Furthermore, while some embodiments / implementations described herein include but do not include certain features included in other embodiments / implementations, combinations of features from different embodiments / implementations are intended to be within the scope of the present invention and to form different embodiments / implementations, as will be understood by those skilled in the art. Therefore, variations and modifications to the above-described embodiments, as long as they fall within the spirit of the present invention, will fall within the scope of the claims of the present invention.

Claims

1. A coating for enhancing flavor and preventing heated cigarette tobacco from falling, characterized in that: The coating is prepared from plant raw materials by the following method: (1) performing a high-temperature pyrolysis reaction on the plant raw material to obtain a cracked char composition and a volatile composition; (2) Condensing the volatile composition to obtain the coating.

2. The coating according to claim 1, characterized in that The plant raw material is a plant powder obtained after grinding; the plant powder is tobacco plant powder and / or non-tobacco plant powder; The tobacco plant includes tobacco leaves and / or tobacco stems; The non-tobacco plants are plants with characteristic fragrance, including one or more of mint, kudzu root, clove, sandalwood, rose, lotus leaf, chrysanthemum, jasmine, tangerine peel, walnut shell, coffee, tea, agarwood, hawthorn, licorice, cocoa, fungus, lotus seeds, apple powder, strawberry powder, pear powder and cold ginger.

3. The coating according to claim 2, characterized in that The temperature of the high-temperature pyrolysis reaction is 300-600°C, the reaction time is 10-30 minutes, and the reaction atmosphere is an inert atmosphere; the inert atmosphere is nitrogen, argon or helium; The temperature at which the volatile composition condenses is -15 to 5°C; The viscosity of the coating is 50 to 700 mPa·s, and the density of the coating is 1.05 to 1.20 kg / dm3.

4. A cigarette paper for heating cigarettes, characterized in that: The cigarette paper comprises a paper substrate and a coating according to any one of claims 1 to 3 for enhancing flavor and preventing heated cigarette tobacco from falling off.

5. The cigarette paper according to claim 4, characterized in that The paper substrate includes a coating layer, wherein the coating constitutes the coating layer; the coating layer is coated or pressed on the inner surface of the paper substrate, The coating layer is arranged on the inner surface of the paper substrate. When the heated cigarette is in the smoking state, the heating temperature is greater than or equal to 250° C., and the generated smoke is transferred to the coating layer, so that the coating layer is bonded to the aerosol-generating matrix in the heated cigarette.

6. The cigarette paper according to claim 5, characterized in that The paper substrate further comprises an outer covering layer and / or an impermeable layer, The outer covering layer includes bamboo fibers and wood pulp fibers, and the wood pulp fibers include softwood pulp fibers and / or hardwood pulp fibers.

7. The cigarette paper according to claim 6, characterized in that The anti-seepage layer is used to prevent the coating from leaching out of the outer surface of the cigarette paper; The anti-seepage layer is arranged on the outer surface of the outer cladding layer, and the coating layer is arranged on the inner surface of the outer cladding layer; or The anti-seepage layer is arranged between the outer layer and the coating layer; the anti-seepage layer includes anti-seepage paper and / or anti-seepage coating, and the anti-seepage paper includes aluminum foil, tin foil and / or kraft paper; the anti-seepage coating includes polypropylene, polyacrylate, polytetrafluoroethylene, chitosan and / or silicon dioxide.

8. The cigarette paper according to claim 7, characterized in that The coating area is 20% or more of the inner surface area of ​​the paper substrate, and the coating amount is 30 to 200 mg / cm 3 .

9. A heated cigarette, characterized in that: The heated cigarette comprises the cigarette paper as claimed in claim 4.

10. The heated cigarette according to claim 9, characterized in that: The heated cigarette also includes a smoking portion, an intermediate composite portion, a filter rod portion and a plug wrap; The smoke generating portion includes an aerosol-forming substrate, and the aerosol-forming substrate is used for heating and atomizing to generate smoke; The cigarette paper is wrapped around the outside of the smoking portion; when the heated cigarette is heated to above 250° C., the coating layer formed by the coating on the cigarette paper is bonded to the aerosol generating matrix to enhance flavor and prevent the aerosol generating matrix from falling off; The wrapping paper wraps the middle composite part and the filter rod part and is then connected to the cigarette paper to form a whole to form the heated cigarette.

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