Classifications

• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/18—Treatment of tobacco products or tobacco substitutes
  • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
  • A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
  • A24B15/32—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances by acyclic compounds
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/10—Chemical features of tobacco products or tobacco substitutes
  • A24B15/16—Chemical features of tobacco products or tobacco substitutes of tobacco substitutes
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/18—Treatment of tobacco products or tobacco substitutes
  • A24B15/24—Treatment of tobacco products or tobacco substitutes by extraction; Tobacco extracts
  • A24B15/241—Extraction of specific substances
  • A24B15/243—Nicotine
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/18—Treatment of tobacco products or tobacco substitutes
  • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
  • A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
  • A24B15/302—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances by natural substances obtained from animals or plants

Definitions

• An aerosol-generating substrate for vaping comprising semi-solid substrate
• the present invention relates to an aerosol-generating substrate and its manufacturing method.
• the invention also relates to an aerosol-generating article comprising the aerosol-generating substrate.
• aerosol-generating articles and its devices for use as a new form of smoking have been mushrooming and commercially available on the market.
• These include one of the most well-known new form of e-cigarettes (vaping) that are electrically heated in which an aerosol is generated by the transfer of heat from a heating element of the aerosol-generating device to the aerosol-generating substrates or materials.
• aerosol-forming substrate is heated at a rather relatively low temperature, for instance below 350 °C, to avoid combustion thereof.
• a charge of inhalable aerosol can then be released from the aerosol-generating article.
• the aerosol released is originated from the aerosol formers, which are incorporated into the tobacco material, which may be particulated or granulated.
• coughing also known as coughing fit
• the inventors of the present invention have found solutions to the above-discussed problems through the aerosol-generating substrate for the aerosol-generating article.
• a first aspect of the invention is accordingly to provide an aerosol generating substrate for vaping, comprising semi-solid substrates, wherein up to about 1.0 wt. % of the total weight percentage of the aerosol-generating substrate are comprised of a carboxylic acid-containing alcohol solution, wherein one or more carboxylic acids are dissolved in the alcohol solution, wherein the semi solid substrate is provided in form of a foam.
• a second aspect of the invention is accordingly to provide a method of preparing an aerosol-generating substrate for vaping, comprising a semi-solid substrate in form of a foam, comprising the steps of: a. Providing an aerosol-generating substrate comprising one or more components selected from the list consisting of propylene glycol, 1 , 3- Propanediol, glycerol and water; b. Providing one or more carboxylic acids to an alcohol solution, followed by incorporating the one or more carboxylic acid-containing alcohol solution to the aerosol-generating substrate to form a mixture, such that up to about 1 wt. % of the total weight percentage of the aerosol-generating substrate are comprised of the one or more carboxylic acids-containing alcohol solution; c.
• a third aspect of the invention is to provide an aerosol-generating substrate according to the present invention for use in reducing coughing fit from vaping.
• a fourth aspect of the invention is to provide an aerosol-generating substrate obtainable according to the present invention.
• the aerosol-generating substrate according to the present invention thanks to the small amount of carboxylic acids dissolved in an alcohol solution (wherein up to 1.0 wt.-% of the total weight percentage of the aerosol-generating substrate are comprised of the one or more carboxylic acids-containing alcohol solution), wherein the aerosol-generating substrate comprising semi-solid substrate provided in form of a foam or tobacco mousse), the aerosol-generating substrate according to the present invention unexpectedly reduces the coughing fit to an acceptable level. Moreover, it was found out also that the taste becomes smooth without any negative off taste. This effect of reducing coughing fit is particularly noticeable when one or more carboxylic acids such as stearic acid and/or decanoic acid are present in the alcohol solution of aerosol-generating substrate.
• the aerosol-generating substrate comprises between 0.2 wt. % and 1 wt. % of the carboxylic acid-containing alcohol solution based on the total weight percentage of the aerosol-generating substrate, preferably about 0.2 wt. %, 0.5 wt. %, 0.8 wt. %, or 1.0 wt. % of the carboxylic acid-containing alcohol solution in the total weight percentage of the aerosol-generating substrate.
• These ranges or amounts of the carboxylic acid present in the mixture are sufficient to reduce the irritation of throat/coughing fit to an acceptable level.
• the carboxylic acid-containing alcohol solution is provided in a concentration of between about 0.05 v/v % and about 0.2 v/v %, preferably between 0.08 v/v % and 0.15 v/v %, or more preferably at 0.1 v/v %.
• concentration used herein are provided in volume percent concentration for instance (v/v %), molarity or may be provided in mass percent concentration.
• the carboxylic acid has a hydrocarbon chain length between 9 and 30 carbons, preferably between 10 and 20 carbons.
• the carboxylic acid is selected from the list consisting of Benzoic acid, Levulinic acid, D/L-Tartaric acid, Capric acid, Pyruvic acid, Citric acid, Fumaric acid, D/L-Lactic acid, D/L-Malic acid, Sorbic acid, Adipic acid, L-Aspartic acid, L-Glutamic acid, Succinic acid, Gluconic acid, Linoleic acid, Saccharic acid, 3,7 dimethyl-6-octenoic acid, 2-methyl pentanoic acid, trans-2-Hexenoic acid, Caprylic acid, Why acid, Stearic acid, Butyric acid, Linolenic acid, Malonic acid, Myristic acid, Oleic acid, Palmitic acid, Phenylacetic acid, Propionic acid, Valeric acid, Decanoic acid, Hexanoic acid and Octanoic acid.
• Benzoic acid Levulinic acid
• D/L-Tartaric acid Capric acid
• the carboxylic-acid-containing alcohol solution comprises only saturated fatty acid such as stearic acid and/or decanoic acid, preferably in the ratio of 10/90, 20/80, 30/70, 40/60, 50/50 of stearic acid/decanoic acid.
• the carboxylic-acid-containing alcohol solution comprises only stearic acid or decanoic acid.
• the alcohol solution comprises only stearic acid and decanoic acid, preferably in the ratio of 10/90, 20/80, 30/70, 40/60, 50/50 of stearic acid/decanoic acid.
• the inventors have found out that these two compounds are particularly effective in suppressing throat irritations, wherein the ratios of 20/80 to 50/50 of stearic acid/decanoic acid are particularly effective in reducing coughing fit.
• the aerosol-generating substrate further comprises one or more components selected from the group consisting of propylene glycol, 1, 3 propanediol, glycerol, water, gum, flavourant, additives, nicotine, and binder.
• the solvent has a pH value in the range from 6 to 7, preferably 6.2 to 6.8, more preferably 6.3 to 6.5.
• acidic condition is preferred, for instance between 4 and 6.9.
• the carboxylic acid-containing alcohol solution can be prepared for instance by first weighing the weights of the ingredients (e.g. solvent, solute either in solid form or liquid form), mixing the mixture in a bottle, leaving the mixture for at least 24 hours in room temperature for the solute to completely dissolved in the solvent, and finally mixing the mixture before usage in foam making.
• the ingredients e.g. solvent, solute either in solid form or liquid form
• the mixture is heated at approximately 45 °C and/or aerated or mixed for approximately 5 minutes.
• the aerosol-generating substrate in form of foam can be prepared for instance by
• Adding a binder preferably within 1 minute and further mix the mixture for 5 minutes at 45 °C (for example with speed “6” in the Krups machine); - Fill the foamed aerosol-generating substrate in molds and heat in in an oven at about 50 C for about 18 hours.
• a tobacco-containing material can be any compound, mixture, particle matter, and/or solution that contains and/or carries a constituent of tobacco, either artificially included or naturally contained in tobacco, e.g. tobacco, tobacco particles, tobacco flavor and/or nicotine.
• tobacco, tobacco particles, tobacco flavor and/or nicotine an example for an artificially added non-tobacco-specific flavor would be menthol.
• the term "aerosol-generating article” refers to an aerosol-generating article for producing an aerosol comprising an aerosol generating material that is intended to be heated rather than combusted in order to release volatile compounds that can form an aerosol.
• the term "aerosol-generating substrate” refers to a material, upon heating, capable of releasing volatile compounds, which can form an aerosol.
• the aerosol generated from aerosol-generating material of aerosol generating articles described herein may be visible or invisible and may include vapours (for example, fine particles of substances, which are in a gaseous state, that are ordinarily liquid or solid at room temperature) as well as gases and liquid droplets of condensed vapours.
• vapours for example, fine particles of substances, which are in a gaseous state, that are ordinarily liquid or solid at room temperature
• An aerosol-forming agent can be any compound, mixture and/or solution that is capable of forming an aerosol, e.g. when heated and/or in mixture with a tobacco-containing agent.
• Well known examples include humectants such as glycerin and propylene glycol, other alcohols, such as ethanol, etc.
• the term “semi-solid substrate” refers to the state of the substrate, which is highly viscous, slightly thicker than semi-fluid. In other words, the semi-solid substrate does not include solid material (i.e. firm and stable in shape) nor liquid or fluid.
• solid material i.e. firm and stable in shape
• liquid or fluid examples for “semi-solid substrates” in the present invention are for instance foam, gel, mousse, or thick mucus.
• an open pored foam is to be understood as a foam which can be considered as being formed of a plurality of interconnecting pores (formed out of a structural material derived from the foam forming agent cooperating with the interacting components such as the foam stabilizing agent, solid components such as tobacco particles and some solvent, etc.) which are able to contain fluid, in particular a mixture of humectant/liquid aerosol-forming substrate and air, wherein at least a significant portion (e.g.
• the mousses formed as described herein are largely open-pored mousses because after cooling or heating of the aerosol-generating material, vapour is released from the mousse, substantially all of the humectant appears to be released based on measuring of the weight of the mousse portion before and after heating, which could not be readily explained if the humectant was not able to travel through neighboring pores to reach the surface of the mousse portion.
• closed pores could perhaps be opened by rupturing a closed cell wall as a result of the pressure of vaporized gas, etc.
• An electronic cigarette (e-cigarette) or similar devices like electronic pipes or heat-not-burn devices, as referred to in the present invention, are not particularly limited, and may be used to provide a user with an aerosol to inhale It can, according to certain embodiments, comprise a mouthpiece, a heater, a receiving portion, e.g. a pod, stick, capsule, and a casing.
• wt.-% is to be understood as weight percent, based on the total weight percentage of the aerosol-generating substrate, unless explicitly otherwise specified. In the present disclosure, all amounts are given in wt.-%, unless clearly stated otherwise or obvious from context. In the present disclosure, furthermore all amounts given in wt.-% add up to 100 wt.-%. The weight percent are thereby calculated by dividing the mass of each component by the total mass e.g. of the substrate, unless indicated otherwise or clear from context. In the present case, the chemical compounds can also be applied in vol. % accordingly which is within the common capability of a skilled person.
• vol. % is to be understood as volume percent, based on the total volume of the substrate, unless explicitly otherwise specified. In the present disclosure, all amounts given in vol. % in a particular substrate add up to 100 vol. % . The volume percent are thereby calculated by dividing the volume of each component by the total volume of the substrate, unless indicated otherwise or clear from context.
• aeration values also known as pore volumes as used herein indicate the vol. % of the foam or mousse which is composed of air. The actual aeration values of samples have been estimated using the following procedure: a sample of “foam” is made without taking any action (e.g.
• Particle sizes as disclosed in this invention, can be measured by any suitable method, e.g. sieving or laser diffraction, preferably sieving.
• the (dynamic) viscosity described herein refers to the flow behaviour of liquids. It is defined as the internal frictional resistance of a liquid to the application of a pressure or a shearing stress.
• the dynamic viscosity is given in millipascal-seconds (mPas) and is determined by using a rotary viscometer. The viscosity measured in performed at room temperature i.e. 22 °C.
• cooling is to be understood as having a temperature at a room temperature (around 22-24 degrees Celsius) for at least 60 minutes, or at a temperature less than 16 °C for at least 10 minutes, or more preferably at a temperature less than 12 °C for at least 5 minutes.
• aeration is to be understood as introduction of air or gasses into, through an external step, into the material.
• the aeration can be performed for instance though whipping, beating, mixing, or aerating with an aeration machine such as Krups Prep & Cook HP 5031 mousse whipping shuffle, or by injection air with an aerator, e.g. like Mondomix aerator.
• Aeration can be carried out at any suitable temperature.
• the duration of the aeration can be for instance 1 , 2, 3, 4, 5 or 10 minutes or more.
• the Present invention relates to an improved aerosol-generating substrate and a method of producing the aerosol-generating substrate thereof. It has been found out that when the aerosol-generating (tobacco-containing) substrate of the present invention comprises up to 1 .0 wt. % carboxylic acid (which is dissolved in a alcohol solution) of the total weight percentage of the aerosol-generating substrate, the carboxylic acid-containing aerosol-generating substrate surprisingly reduces throat irritation or coughing fit.
• Vaper’s cough is a condition not uncommon among vapers especially those who are new in e-vaping. Inhaling the vapour sometimes triggers a nasty coughing fit i.e. irritation causing coughing urge upon inhalation of an aerosol generated by heating of the substrate. There could be multiple factors for triggering such a coughing fit. For instance, some vapers are affected by the unadulterated nicotine in e-cigarettes, or the coughing may be triggered by inhaling too deeply, or too quickly, or the vaporizer’s advanced settings are not fine-tuned accordingly.
• the inventors have investigated the possible alternative formulas of an aerosol-generating substrate which are particularly aimed at reducing coughing fit.
• the inventors found out that when up to about 1 .0 % of the total weight percentage of the aerosol-generating substrates are comprised of the one or more carboxylic acid in an alcoholic solution, the surprising effect of coughing fit reduction (or reduction of throat irritation) has been observed. It is furthermore disclosed herein that the reduction of the coughing fit was particularly obvious when the aerosol-generating substrate comprises semi-solid substrate e.g. that the aerosol-generating substrate is provided in form of semi-solid substrate such as foam or mousse form or gel form.
• the aerosol-generating substrate comprising carboxylic acid (especially for instance comprising stearic acid and/or decanoic acid), when in semi-solid state i.e. foam or gel, the higher surface to volume ratio allows the carboxylic acid to be vaporised or released more efficiently compared to when the aerosol-generating substrate is provided in a liquid or solid form.
• carboxylic acid especially for instance comprising stearic acid and/or decanoic acid
• the foam-stabilizing agent may be additionally introduced into the aerosol-generating substrate.
• the foam-stabilizing agent is not particularly limited as long as it can stabilize the foam to some extent after formation.
• the foam stabilizing agent of the present foam is selected from the group consisting of cellulose gum, hydroxyalkylated carbohydrates, and mixtures thereof. Both of the cellulose gum and the hydroxyalkylated carbohydrates are not particularly restricted.
• the foam-stabilizing agent is a cellulose gum, particularly a carboxymethylcellulose, or a derivative thereof.
• An exemplary, preferred, cellulose gum which may be used in the present invention is CEKOL® 2000 and/or Ceroga 4550C (C.E.
• Another class of suitable foam stabilizing agents are hydroxyalkylated carbohydrates, and more preferably cellulose ethers and derivatives thereof.
• a cellulose ether or derivative thereof that can be used can have at least one substituent selected from the group consisting of methyl, ethyl, hydroxyethyl and hydroxypropyl groups. It can further be substituted with a linear or branched substituted or unsubstituted alkyl radicals having 1 - 20 carbon atoms or an aralkyl radical having 7 to 20 carbon atoms. Such radical is preferably attached by an ether linkage.
• Suitable substituents can e.g.
• the cellulose ether is selected from hydroxyethylcellulose, methylcellulose, methylhydroxyethylcellulose, ethylhydroxyethylcellulose, and mixtures thereof.
• mixtures of different cellulose gums, different hydroxyalkylated carbohydrates, and mixtures of one or more cellulose gum with one or more hydroxyalkylated carbohydrate, as well as derivatives of one or either thereof can be used.
• salts of these cellulose ethers preferably alkali metal salts thereof, e.g. sodium and/or potassium salts thereof.
• foam-forming agent may be additionally added to the mixture of aerosol-generating substrate.
• the foam-forming agent is not particularly restricted.
• the foam-forming agent of the present foam is selected from the group consisting of agar, gellan gum, lecithin, polyglycerol esters of fatty acids, glycerol esters of fatty acids, sorbitan esters of fatty acids, and/or mixtures thereof, without being limited thereto.
• a preferred foam-forming agent is gellan gum.
• Glycerol esters can be prepared by standard esterification methods.
• the foam-forming agent can suitably be a compound such as glycerol monostearate and/or glycerol monooleate.
• Polyglycerol esters can be prepared by polymerizing glycerin under alkaline conditions suitably followed by reacting them with specific fatty acids. Suitable polyglycerol esters can be hexaglycerol monooleate, octaglycerol monostearate and/or octaglycerol monooleate.
• Sorbitan esters of fatty acids used in certain embodiments of the present invention can be sorbitan monostearate, sorbitan monooleate and/or sorbitan mono palmitate.
• any possible combinations of compounds belonging to the above-mentioned classes can be used.
• the present methods can be realized also through by having a step of mixing the aerosol-generating substrate that is aerated after adding of the foam- stabilizing agent and/or after cooling of the mixture. This does not exclude that other aeration steps are also being carried out, and according to certain embodiments, one, two or preferably all of the optional aeration steps are carried out in the present methods. Also, it is not excluded that aeration is carried out already concomitantly with a mixing and/or addition step.
• the method of aeration is not particularly restricted and can involve e.g. an injection of air, a whipping in of air - e.g.
• aeration can be carried out using a sufficient mixing machine similar to a mixer for preparing a mousse, e.g. a Krups Prep & Cook HP 5031 mousse whipping shuffle, and or by injection air with an aerator, e.g. like Mondomix aerator.
• Aeration can be carried out at a suitable temperature, e.g. at room temperature (around 20 - 24 °C), 30 - 80°C, e.g. to 35 - 75°C, preferably between and including 30 - 60°C.
• aeration is carried out concomitantly with a mixing and/or in a step of adding an ingredient, e.g. when using whipping.
• the aerosol-generating substrate as claimed presently even without adding additionally foam-forming agent and/or foam-stabilizing agent, with the above-explained method, the mixture of aerosol generating substrate can be transformed into semi-solid condition i.e. foam, mousse, gel or the like.
• the aerosol-generating substrate of the present invention is a semi-solid substrate.
• ingredients for forming the aerosol-generating foam such as the aerosol-forming agent, the form-foaming agent, the foam-stabilizing agent, the tobacco-containing agent, the inhalable agent, the at least one non-tobacco flavoring agent and the solvent are not particularly restricted.
• a gas used for aeration is not particularly restricted, and can be e.g. air.
• further components can be admixed. According to certain embodiments, essentially no further components or no further components are admixed, though.
• the aerosol-forming agent can further comprise water. According to certain embodiments, no water is contained, though, since water in aerosol form can burn the mouth of a user. Water can be contained in an amount of 0 - 15 wt.- % of the total weight percentage of the foam or the aerosol-generating substrate, e.g. 5 - 10 wt.-%. Examples
• Table 1 Tobacco mousse (foam) containing different percentages of carboxylic acid-containing alcohol solution.
• Table 1 shows tobacco mousse (foam) comprising different weight percentages of carboxylic acids (i.e. stearic acid and decanoic acid)-containing alcohol solution were investigated.
• carboxylic acids i.e. stearic acid and decanoic acid
• Table 1 shows tobacco mousse (foam) comprising different weight percentages of carboxylic acids (i.e. stearic acid and decanoic acid)-containing alcohol solution were investigated.
• carboxylic acids i.e. stearic acid and decanoic acid
• the propylene glycol, the glycerin, carboxylic acid alcohol solution (comprising an equal amount of stearic acid and decanoic acid) and optionally the purified water were whipped and aerated for 5-10 min, preferably at 6 min, at 45°C using a Krups Prep & Cook HP5031 mousse whipping shuffle.
• the speed has to be adjusted so that the volume visibly increases, and small bubbles appear and partly stay in the foam. If whipping is too fast then mixing will take over and the foamy structure is going to collapse, thus back to fluid.
• whipping is started slowly and the whipping speed is slowly increased as the foam begins to develop a lighter, more mousse-like texture; the speed is backed-off by about 10% if it is noticed that the mousse seems to be reducing its mousse-like texture and becoming seemingly less aerated.
• a sudden cooling with ice or cool water is recommendable.
• Krups device the best results can be obtained with a speed in between 60 and 200 rpm. Adaptation is within the skilled person’s knowledge in accordance with the above description.
• a next step (within 1 minute of the previous step), the gum was added, and the mixture was whipped and aerated for 5-10 minutes, preferably at 6 min, at 45°C using a Krups Prep & Cook HP5031 mousse whipping shuffle. Afterwards the tobacco powder was added and whipping, and aeration were carried out for 5-10 min, preferably at 6 min, at 45°C with the same method. Next, the binder was added, and the mixture was again whipped and aerated for 5-10 min, preferably at 6 min, at 45°C with the same method. Finally, the mixture was placed in an oven at 50 °C for 12 hours before is ready to be packed and be used. As no international standard of “sensory evaluation” for a coughing fit is available, the scoring of the “sensory evaluation” for the coughing fit is carried out as described below. Results obtained from the Example 1 were shown in the Table 2.
• Table 2 Mean coughing fit scores rated by test subjects.
• the Sample 1 (containing no carboxylic acid in the consumables) were first given to the test subjects to be rated. Each test subject inhaled 10 puffs within 3 minutes and the degrees of the throat irritation were rated (Score of 100 being very irritated; Score of 60 being rather irritated; Score of 30 being slightly irritated; Score of 0 being not irritated).
• Samples 2, 3, 4 and 5 were given in a random order to the test subjects. The procedure was repeated similar as in the control sample (Sample 1).
• the coughing fit scores were rated by the test subjects based on their sensation to throat irritation. A pause of 60 seconds (or 120 seconds) is given before a new sample is given to the test subject.
• the Samples 2, 3, 4 and 5 which comprised of 0.2 wt.-%, 0.5 wt.-%, 0.8 wt.-% and 1.0 wt.-% of carboxylic acid- containing alcohol solution, respectively, in the total weight percentage mixture of aerosol-generating substrate showed lower mean coughing fit scores compared to the control sample (Sample 1).
• the total weight of Sample 1 (0 wt. % Stearic acid and decanoic acid) is 500 g.
• Sample 1 (control sample) which did not comprise any carboxylic acid (fatty acid) registered highest mean coughing fit score (71.25). It was observed that aerosol-generating substrates comprising 0.2 wt. % and 1.0 wt. % of carboxylic acid-containing alcohol solution based on the total weight percentage of the aerosol-generating substrates have significantly low scores i.e. less than 40 compared to the control Sample 1 , namely 36.25, 33, 39 and 37 for Samples 2, 3, 4 and 5, respectively. These values represent only slightly throat irritation or coughing fit in the Samples 2 to 5 were observed as reported by various test subjects.
• present foams according to the present invention are not smokable, i.e. are applied in a way that they are not heated to such temperature where they are combusted, but only at least parts thereof are evaporated, particularly at least essentially the aerosol-forming agent and further preferably at least a part of the tobacco-containing agent and/or the inhalable agent.
• At least some parts of the tobacco-containing agent and/or the inhalable agent preferably is adhered to the foam structure and/or absorbed by the foam structure formed essentially by the foam-forming agent and the foam- stabilizing agent, so that it can be easily released together with the aerosol forming agent upon heating. Also, it is possible that some parts of the tobacco- containing agent and/or the inhalable agent are bound to the foam structure and the tobacco-containing agent and/or the inhalable agent are "extracted” during heating thereof, so that a flavour from the tobacco-containing agent and/or the inhalable agent is released thereof together with the aerosol-forming agent.
• the tobacco ingredient containing agent and/or the inhalable agent is configured in such a way that it is released upon heating together with the aerosol-forming agent by only being essentially adsorbed to and/or absorbed in the foam structure.
• a mass loss in the foam can be observed that shows that essentially at least the mass of the foam-forming agent and the foam-stabilizing agent remains.
• the structure of the foam is mainly formed by the foam-forming agent, which forms a "capsulation" for adhering and/or absorbing the aerosol forming agent and the tobacco ingredient containing agent and/or an inhalable agent, whereas the foam-stabilizing agent stabilizes the foam to keep the foam form.

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• 2021
  • 2021-02-25 KR KR1020227028376A patent/KR20220146449A/ko active Search and Examination
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