Aerosol generating article for infrared heated smoking devices

Abstract

To solve the problem of the conventional technology that the expected heating effect cannot be obtained when an existing heated cigarette is directly applied to an infrared heated smoking device. The present invention discloses an aerosol-generating article for an infrared-heated smoking device, comprising a sheet and an aerosol-generating matrix enclosed within the sheet. The sheet has a thickness of ln(TS a ) × D / D0>-2.00 and / or ln(TS b )×D / D0>-0.30, where TS a The infrared spectrum transmittance curve of the sheet is 3500~3000cm -1 Valley bottom permeability coefficient, TS b is the infrared spectral transmittance curve of the sheet from 1750 to 1550 cm -1 where D is the thickness of the sheet, and D0 is 0.01 mm. By selecting a sheet of an appropriate thickness depending on the thickness of the sheet, the aerosol-generating article can make the most of the thermal radiation characteristics of the infrared-heated smoking device.

Description

[Technical Field]

[0001] This application relates to the technical field of heated, non-combustion type cigarettes, and more specifically, to an aerosol generating article for infrared heating type smoking devices. [Background technology]

[0002] Smoking products such as cigarettes and cigars produce smoke when tobacco burns during use. Attempts have been made to provide alternatives to these tobacco-burning products by creating products that release compounds without combustion. An example of such a product is the so-called heated non-combustion type product, which releases compounds by heating tobacco rather than burning it.

[0003] Existing heated, non-combustion smoking devices primarily generate heat through a heating element, which conducts that heat to an aerosol generation matrix in the chamber, causing at least one of its components to volatilize and produce an aerosol that the user can smoke. Typically, the heating element used in such smoking devices is a resistance heater, which imparts thermal energy to the cigarette through heat conduction, generating aerosol smoke. Currently, heated cigarettes use liquids such as propylene glycol and glycerin as smoke-generating agents. Propylene glycol and glycerin readily absorb moisture from the air and penetrate conventional tobacco paper, so commercially available electrically heated cigarettes such as iQOS cigarettes need to be wrapped in a layer of aluminum foil on the outside of the aerosol generation matrix to prevent the penetration of the smoking agent.

[0004] Currently, a new type of non-combustion heating smoking device is emerging that uses an infrared heater to heat an aerosol generating matrix, transferring thermal energy to the cigarette through thermal radiation to generate aerosol smoke. However, it has been found that when existing heated cigarettes are directly applied to such infrared heating smoking devices, the expected heating effect is not obtained, infrared rays do not act well on the tobacco, the heat transfer rate is very slow, the amount of smoke is not as much as with resistance heating smoking devices, and the aerosol generating matrix cannot produce a sufficient and harmonious aroma generated by infrared irradiation in a laboratory environment. Therefore, in order to solve the above technical problems, it is necessary to provide a new aerosol generating article for infrared heating smoking devices. [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] The object of this application is to provide an aerosol generating article for infrared heating smoking devices that solves the problem of the prior art in that the expected heating effect cannot be obtained when existing heated cigarettes are directly applied to infrared heating smoking devices. [Means for solving the problem]

[0006] To achieve the above objectives, this application provides the following technical solutions.

[0007] The present invention relates to an aerosol generating article for an infrared heating type smoking device, comprising a sheet and an aerosol generating matrix enclosed within the sheet, wherein the sheet satisfies the following formula: ln(TS a ) × D / D0 > -2.00 and / or ln(TS b ) × D / D0 > -0.30 Here, TS a This is the infrared spectral transmission curve of the sheet at 3500-3000 cm². -1 Valley bottom transmittance coefficient, TS in the range b This is the infrared spectral transmission curve of the sheet from 1750 to 1550 cm. -1Provided is an aerosol generating article for an infrared heating type smoking device, in which the bottom valley transmission coefficient within a range, D is the thickness of the sheet, D0 is 0.01 mm.

[0008] Furthermore, the sheet satisfies the following formula: ln(TS a )×D / D0 > -1.50 and / or ln(TS b )×D / D0 > -0.25.

[0009] Furthermore, the sheet satisfies the following formula: ln(TS a )×D / D0 > -1.00 and / or ln(TS b )×D / D0 > -0.20.

[0010] Furthermore, the aerosol generating matrix contains more than 80% by weight of tobacco raw materials on a dry weight basis.

[0011] Furthermore, the tobacco raw material is tobacco and / or reconstituted tobacco.

[0012] Furthermore, the tobacco raw material is one or more of cut tobacco, tobacco particles, tobacco flakes, tobacco powder, reconstituted cut tobacco, reconstituted tobacco particles, reconstituted tobacco flakes, and reconstituted tobacco powder.

Advantages of the Invention

[0013] Compared with the prior art, the beneficial effects of the present application are as follows.

[0014] In the aerosol generating article for an infrared heating type smoking device according to the present application, by selecting a sheet with an appropriate thickness according to the characteristics of the sheet, the heat radiation characteristics of the infrared heating type smoking device can be maximally utilized, enabling the organic components in the aerosol generating matrix to sufficiently undergo the Maillard reaction, accelerating the heat transfer rate to the aerosol generating article, increasing the amount of smoke of the aerosol generating article, and improving the strength and harmony of the aroma of the aerosol generating article.

Brief Description of the Drawings

[0015] [Figure 1] The infrared transmission spectrum of the shredded tobacco of a selected heat-not-burn cigarette according to an embodiment of the present application. [Figure 2] The infrared transmission spectrum of a selected cigarette paper #1 according to an embodiment of the present application. [Figure 3] The infrared transmission spectrum of a selected cigarette paper #2 according to an embodiment of the present application. [Figure 4] The infrared transmission spectrum of a selected cigarette paper #3 according to an embodiment of the present application. [Figure 5] The infrared transmission spectrum of a selected cigarette paper #4 according to an embodiment of the present application. [Figure 6] The infrared transmission spectrum of a selected cigarette paper #5 according to an embodiment of the present application. [Figure 7] The infrared transmission spectrum of a selected cigarette paper #6 according to an embodiment of the present application. [Figure 8] The infrared transmission spectrum of a selected cigarette paper #7 according to an embodiment of the present application. [Figure 9] The response values of each component in the GC-MS test of the smoke of cigarette #1 according to an embodiment of the present application.

Mode for Carrying Out the Invention

[0016] The technical solution in the embodiment of the present application will be clearly and completely described below with reference to the drawings in the embodiment of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0017] Embodiments of the present invention provide an aerosol generating article for an infrared-heated smoking device, comprising a sheet and an aerosol generating matrix enclosed within the sheet. The aerosol generating article is placed inside the infrared-heated smoking device, and when the infrared-heated smoking device heats the aerosol generating article, a portion of the infrared radiation emitted from the infrared heater of the infrared-heated smoking device passes through the sheet and is absorbed by the aerosol generating matrix.

[0018] In this application, we will specifically conduct a quantitative study on the relationship between the infrared spectral characteristics of the sheet and the smoke generation characteristics of the aerosol generation matrix, as follows.

[0019] Infrared heating technology primarily involves studying the interaction mechanisms between radiation and material structure. An infrared heating source emits infrared radiation, which is absorbed by the material being heated, generating a thermal effect. So-called matching radiation refers to the phenomenon where, when the frequency of infrared radiation irradiated onto an object matches the vibrational frequency of the molecules that make up that object, the molecules absorb the infrared energy, causing partial matching absorption. This energy exchange between molecules increases the internal energy (vibrational and rotational energy) of the molecules, which manifests as a rise in the object's temperature. The theory behind infrared radiation heating technology is based on the infrared spectral matching absorption principle developed by Japanese scholar Hidekatsu Hosokawa. This theory asserts that when the wavelength of the radiation source matches the absorption wavelength of the target material, the target material absorbs a large amount of infrared energy, thereby completely converting photon energy into vibrational and rotational energy of the material molecules, laying the foundation for the application of infrared heating technology.

[0020] Through the continuous application and updating of the technology, Professor Hou Lan-Tian has proposed the "partial matching absorption principle," which states that in the infrared band, any radiation that an object can absorb causes a thermal effect on the object, and that in the case of thick objects to be heated, "mismatched" absorption outside the absorption band can be more important for heating. Far infrared radiation has a certain penetrating power, and its penetration depth ranges from a few microns to a few millimeters, so infrared radiation energy is absorbed not only by surface molecules but also by molecules inside the object. Therefore, by selecting the necessary radiation and absorption parameters in the spectrum according to the mechanism of infrared heating technology, objects of a certain thickness can be heated. This can be divided into the following three methods.

[0021] 1. Absorption at the surface: By employing optimal radiation wavelength matching, that is, by correlating the radiation peak band with the absorption peak, the material at the surface is heated through matched absorption. 2. Absorption both internally and externally: This involves varying degrees of deviation of the incident radiation wavelength from the absorption peak band wavelength, a phenomenon known as partial matching absorption. 3. Absorption in the inner layer: To avoid absorption at the surface, the wavelength of the incident radiation is deviated, allowing the radiation energy to reach and be absorbed by the inner layer material, thereby heating the inner layer material. This is called mismatched absorption.

[0022] Infrared heating offers several advantages over conventional heating methods, including reduced heat treatment and heating time for the object being heated, lower energy consumption per unit area, and control over the spatial distribution of radiation direction and dose. Therefore, by using a technique that combines matching absorption, partial matching absorption, and mismatching absorption in the infrared heating spectrum to heat low-temperature, non-combustible shredded tobacco, uniform heating is achieved, preventing heated smoke from condensing onto unheated shredded tobacco, shortening the smoke emission time of the first puff, and improving heating efficiency.

[0023] Suitable shredded tobacco material for infrared-heated non-combustible cigarettes must possess the following characteristics: As an improved alternative to conventional tobacco, it has a taste and aroma composition similar to conventional tobacco, while significantly reducing the amount of harmful substances in the smoke. It also exhibits high heat absorption efficiency in infrared heating technology.

[0024] Suitable tobacco paper for infrared-heated non-combustible cigarettes must possess the following characteristics: Conventional highly reflective leak-proof materials such as aluminum foil should not be used, otherwise heat will be transferred only by thermal conduction. The tobacco paper must have high transmittance of infrared light at the effective wavelength of the absorption peak of the shredded tobacco. Both tobacco paper and shredded tobacco are mainly made of plant fibers. If the infrared absorption peaks of the tobacco paper and shredded tobacco overlap significantly, there will be less infrared light at the effective wavelength acting on the shredded tobacco, resulting in no matching absorption and thus preventing the promotion of the Maillard reaction. The position and height of the infrared absorption peak are greatly related not only to the fiber raw material components of the tobacco paper but also to other auxiliary materials and processing techniques, so suitable tobacco paper for infrared-heated non-combustible cigarettes can only be selected through sample testing and empirical formulas. [Example Test]

[0025] One type of commercially available heated tobacco product was selected, and the loose tobacco was taken out as the test material. The commercially available heated tobacco product used in this test was a slim-type heated tobacco product of the CTOM-yin brand produced by Zhejiang Zhongyan.

[0026] Seven types of commercially available cigarette papers were selected and numbered from #1 to #7. Number #1 is the WAT62GSM brand cigarette paper from Wattens Paper Company of Austria, number #2 is the WAT37 brand cigarette paper from Wattens Paper Company of Austria, number #3 is the H5A1 brand cigarette paper from Schweizer-Moduitt International, number #4 is the H5A2 brand cigarette paper from Schweizer-Moduitt International, number #5 is the H5P1 brand cigarette paper from Schweizer-Moduitt International, number #6 is the H5 brand cigarette paper from Schweizer-Moduitt International, and number #7 is the WAT35 brand cigarette paper from Wattens Paper Company of Austria.

[0027] Of the commercially available tobacco papers used in this test, tobacco papers #1, #2, and #7 were provided by Wattens Paper Company of Austria, and samples are available from their official website. Tobacco papers #3, #4, #5, and #6 were provided by Schweitzer-Moduitt International, and samples are available from their official website.

[0028] Infrared spectral detection was performed on the selected heated tobacco products, including the shredded tobacco and tobacco papers #1 to #7.

[0029] The attenuated total reflection (ATR) method is used for infrared spectrum detection. The infrared spectrometer used is a Thermo Scientific NICOLET380 FTIR, with a spectral range of 400-4000 cm⁻¹. -1 The corresponding wavelength is 2.5 to 25 μm, the test temperature is room temperature (20 to 25°C), and the relative humidity is 70% to 75%.

[0030] Figures 1 to 8 show the infrared transmission spectra of selected heated tobacco rolls, specifically the shredded tobacco and tobacco papers #1 to #7. The vertical axis represents transmittance (TS), 1-TS is the absorbance, and the horizontal axis represents the wavenumber. Dividing 10000 by the wavenumber gives the wavelength (in μm).

[0031] Figure 1 shows the infrared transmission spectrum of selected heated tobacco rolls. As can be seen from Figure 1, 3500-3000 cm⁻¹ -1 There is a strong, characteristic absorption peak in the range of 1750-1550 cm⁻¹, and since both the NH and -COOH absorption peaks are in this range, the amino acid-based substances in shredded tobacco absorb energy at this absorption peak, between 1750 and 1550 cm⁻¹. -1 There is a strong, characteristic absorption peak in this range, and since all C=O absorption peaks of aldehydes and ketones are within this range, sugary substances in shredded tobacco absorb energy at this absorption peak.

[0032] Figures 2-8 show the infrared transmission spectra of selected tobacco papers #1-#7. From these figures, the infrared spectral transmittance curves of each tobacco paper between 3500 and 3000 cm² are shown. -1 The range is 1750~1550cm -1 The valley bottom transmittance coefficients TS (corresponding to absorption peaks) within the range were obtained for each, and these are shown in Table 1. Table 1 shows "Valve bottom transmittance coefficients and paper thickness for tobacco papers #1 to #7".

[0033] [Table 1]

[0034] Selected heated tobacco cut tobacco was wrapped in seven types of tobacco papers #1 to #7 to obtain seven types of cigarettes. The specifications of the cigarettes are as follows: the length of the cellulose acetate filter is 7 mm, the length of the cigarette is 60 mm, and the diameter of the cigarette is 5.5 mm.

[0035] The seven types of cigarettes listed above were placed in infrared heating devices and resistance heating devices and subjected to heating puff tests. The main heating parameters of the infrared heating devices and resistance heating devices are shown in Table 2. Table 2 shows the "Main heating parameters of infrared heating devices and resistance heating devices".

[0036] [Table 2]

[0037] The reagents and equipment required for the puff test are as follows:

[0038] Reagents: Chromatographically pure methanol, chromatographically pure ethanol, and chromatographically pure phenethyl acetate.

[0039] Equipment and apparatus: Linear smoking machine: CETI-8 model, manufactured by Cerlulean, UK; Filter: 44mm Cambridge filter, manufactured by Whatman, UK; Gas chromatograph-mass spectrometer: GC-MS2020NX model, manufactured by Shimadzu Corporation, Japan.

[0040] The above seven types of cigarettes were subjected to temperature and humidity equilibration according to the method described in the national standard GB / T 16447-2004 "Atmospheric Environment for Preparation and Testing of Tobacco and Tobacco Products". The temperature was 22±1℃, the relative humidity was 60±3%, and the equilibration time was 48 hours. The above seven types of cigarettes were placed in infrared heating devices and resistance heating devices, respectively, and puffed using a linear smoking device. The puff parameters were a puff volume of 55mL, a duration of 3 seconds, and a puff interval of 30 seconds. After starting the heating device, the cigarettes were preheated for 35 seconds. Once preheating was complete, the first puff was started, with 6 puffs per cigarette and 8 cigarettes per round. Particulate matter from the mainstream smoke was collected using a 44mm Cambridge filter. The total particulate matter content of mainstream smoke was tested according to the method described in the national standard GB / T 19609-2004, "Measurement of total particulate matter and tar using a smoking machine for routine analysis of rolled cigarettes."

[0041] Smoke sample pretreatment: The filter used to collect particulate matter from the smoke was folded in half, the condensed material from the collection device was wiped off, and the sample was placed in an Erlenmeyer flask. Next, 25 mL of pure ethanol was added chromatographically for extraction, 200 ppm of phenethyl acetate was added as an internal standard, the flask was shaken for 30 minutes, filtered, and 1.5 mL of the filtrate was taken for GC / MS analysis.

[0042] The GC / MS analysis method is as follows: Chromatography column: Agilent VF-17MS capillary column 30m x 0.25mm x 0.25μm Inlet temperature: 300℃ Temperature rise program: Initial temperature is 50°C, held for 3 minutes, rises to 150°C at a rate of 5°C / min, rises to 300°C at a rate of 15°C / min, and is held for 3 minutes. Injection method: Split injection Split ratio: 20:1 Injection volume: 1uL Carrier gas flow rate: 1 mL / min Ionization method: EI source Ion source temperature: 230℃ Interface temperature: 280℃ Scan Mode: Full Scan

[0043] The component transfer rate of shredded tobacco refers to the proportion of shredded tobacco components that transfer to the smoke, and is one of the indicators representing the atomization efficiency of shredded tobacco components. For example, the smoke component transfer rate of cigarette #1 was tested. The test method was as follows: Shredded tobacco was extracted from 6 cigarettes #1, ultrasonically extracted using 25 mL of methanol solution for 30 minutes, and the response value of each component was tested by GC-MS. Regarding the smoke, based on infrared heating type smoking devices and resistance heating type smoking devices, six cigarettes #1 were puffed using an HCI smoking model without blocking the vents, collected with a Cambridge filter, extracted by shaking in a water bath with 25 mL of methanol for 30 minutes, and the response value of each component was tested by GC-MS. The test results are shown in Figure 9. In Figure 9, 1. Hydroxyacetone; 2. PG; 3. Furfuryl alcohol; 4. Furfural; 5. Cyclopento-4-en-1,3-dione; 6. 5-Methylfurfural; 7. 2(5H)-Furanone; 8. VG; 9. MCP; 10. Benzyl alcohol; 11. Furanone; 12. Menthol; 13. Methicone fluonate; 14. Maltol; 15. 2,3-Dihydro-3,5-Dihydroxy-6-methyl-4H-pyran-4-one; 16. Benzoic acid; 17. 2-Heptone -5-lactone;18, (6E)-5-isopropyl-8-methyl-6,8-nonadien-2-one;19, 5-hydroxymethylfurfural;20, nicotine;21, megastigmatrienone;22, neophytadiene;23, 2,3-bipyridyl;24, triethyl citrate;25, methyl hexadecanate;26, methyl linoleate;27, methyl linolenate;28, acetyl tributyl citrate;29, squalene.

[0044] As can be seen from Figure 9, the detection of a total of 29 major smoke components revealed that most of them had high transfer rates. In particular, the transfer rates of furfural, methylfurfural, and 5-hydroxymethylfurfural all exceeded 100%, indicating that these components are present in higher concentrations in smoke than in shredded tobacco. Furfural, methylfurfural, and 5-hydroxymethylfurfural are all products of the Maillard reaction. The test results indicate that the Maillard reaction of cigarette #1 occurred during infrared heating and smoking.

[0045] Cigarettes #1 to #7 were puffed using infrared heating and resistance heating devices, respectively, and the GC-MS response values ​​of each component in the smoke were analyzed. The test results are shown in Tables 3 to 9. Table 3 shows the "typical amount of aromatic substances released by cigarette #1," Table 4 shows the "typical amount of aromatic substances released by cigarette #2," Table 5 shows the "typical amount of aromatic substances released by cigarette #3," Table 6 shows the "typical amount of aromatic substances released by cigarette #4," Table 7 shows the "typical amount of aromatic substances released by cigarette #5," Table 8 shows the "typical amount of aromatic substances released by cigarette #6," and Table 9 shows the "typical amount of aromatic substances released by cigarette #7."

[0046] [Table 3]

[0047] [Table 4]

[0048] [Table 5]

[0049] [Table 6]

[0050] [Table 7]

[0051] [Table 8]

[0052] [Table 9]

[0053] As can be seen from Tables 3-9, in #1, the typical aroma emitted by the infrared heating type smoking device was not as good as the aroma emitted by the resistance heating type smoking device. Furthermore, when smokers conducted a sensory evaluation according to the national standard GB5606.4-2005 "Rolled Cigarettes, Part 4, Sensory Technical Requirements," they judged the aroma to be weak. In #3, #4, 5, and 6, the typical aroma emitted by the infrared heating type smoking device was equivalent to the aroma emitted by the resistance heating type smoking device and was acceptable to smokers. When smokers conducted a sensory evaluation according to the national standard GB5606.4-2005, they judged the aroma to be sufficient. In #2 and #7, the typical aroma emitted by the infrared heating type smoking device was more abundant than the aroma emitted by the resistance heating type smoking device, and when smokers conducted a sensory evaluation according to the national standard GB5606.4-2005, they judged the aroma to be rich.

[0054] Further refining the above conclusions and drawing reasoning based on experience and theory, we found that the aroma does not weaken if the tobacco paper satisfies the following equation. ln(TS a ) × D / D0 > -2.00 and / or ln(TS b ) × D / D0 > -0.30 Here, TS a This is the infrared spectral transmission curve of the sheet at 3500-3000 cm². -1 Valley bottom transmittance coefficient, TS in the range b This is the infrared spectral transmission curve of the sheet from 1750 to 1550 cm. -1 The valley bottom transmittance coefficient in the specified range, where D is the sheet thickness and D0 is 0.01 mm.

[0055] Furthermore, the aroma will be sufficient if the tobacco paper satisfies the following equation. ln(TS a ) × D / D0 > -1.50 and / or ln(TS b ) × D / D0 > -0.25

[0056] Furthermore, if the tobacco paper satisfies the following equation, the aroma will be even richer. ln(TS a ) × D / D0 > -1.00 and / or ln(TS b ) × D / D0 > -0.20

[0057] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that it can be carried out in other specific forms without departing from the spirit or essential features of this application. Therefore, in any respect, the embodiments should be considered illustrative and non-limiting, and the scope of this application is limited not by the above description but by the appended claims, and thus all modifications within the meaning and scope of the equivalents of the claims are intended to be incorporated into this application. No reference numeral in the claims shall be construed as limiting the scope of such claims.

Claims

1. The aerosol generating article for an infrared heating type smoking device comprises a sheet and an aerosol generating matrix enclosed within the sheet, wherein the sheet satisfies the following formula: ln(TS ａ ) × D / D ０ > -2.00 and / or ln(TS ｂ ) × D / D ０ > -0.30 Here, TS ａ is the valley bottom transmittance coefficient in the range of 3500 to 3000 cm －１ of the infrared spectrum transmittance curve of the sheet, TS ｂ is the valley bottom transmittance coefficient in the range of 1750 to 1550 cm －１ of the infrared spectrum transmittance curve of the sheet, D is the thickness of the sheet, D ０ is 0.01 mm, and it is an aerosol generating article for an infrared heating type smoking device characterized by this.

2. The aforementioned sheet is based on the following formula: ln(TS ａ ) × D / D ０ > -1.50 and / or ln(TS ｂ ) × D / D ０ > -0.25 An aerosol generating article for an infrared heated smoking device according to claim 1, characterized in that it satisfies the requirements.

3. The aforementioned sheet is based on the following formula: ln(TS ａ ) × D / D ０ > -1.00 and / or ln(TS ｂ ) × D / D ０ > -0.20 An aerosol generating article for an infrared heated smoking device according to claim 2, characterized in that it satisfies the requirements.

4. The aerosol generating article for an infrared heating type smoking device according to claim 1, characterized in that the aerosol generating matrix contains more than 80% by weight of tobacco raw material on a dry weight basis.

5. The aerosol generating article for an infrared heated smoking device according to claim 4, characterized in that the tobacco raw material is tobacco and / or reconstituted tobacco.

6. The aerosol generating article for an infrared heated smoking device according to claim 5, characterized in that the tobacco raw material is one or more of the following: shredded tobacco, tobacco particles, tobacco flakes, tobacco powder, reconstituted shredded tobacco, reconstituted tobacco particles, reconstituted tobacco flakes, and reconstituted tobacco powder.

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