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] The present application relates to the technical field of heated non-combustible cigarettes, and more particularly to an aerosol-generating article for an infrared heated smoking device. [Background technology]

[0002] Smoking articles, such as cigarettes and cigars, burn tobacco to produce smoke during use. Attempts have been made to provide alternatives to these tobacco-burning articles by creating products that release compounds without combustion. Examples of such products are so-called heat-and-no-burn products, which release compounds by heating rather than burning tobacco.

[0003] Existing heated non-combustion smoking devices primarily generate heat through a heating element, which conducts the heat to an aerosol-generating matrix within a chamber, volatilizing at least one component of the matrix and generating an aerosol that can be smoked by the user. The heating element used in these smoking devices is typically a resistive heater, which transfers heat energy to the cigarette through thermal conduction, generating aerosol smoke. Currently, heated cigarettes use liquids such as propylene glycol and glycerin as smoke-generating agents. Because propylene glycol and glycerin readily absorb moisture from the air and penetrate conventional cigarette paper, commercially available electrically heated cigarettes, such as iQOS cigarettes, require the aerosol-generating matrix to be wrapped in a layer of aluminum foil to prevent the smoking agent from penetrating the matrix.

[0004] Currently, new types of heat-and-burn smoking devices have emerged that use infrared heaters to heat an aerosol-generating matrix, which then transfers heat 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-heated smoking devices, the expected heating effect cannot be achieved, the infrared rays do not easily affect the tobacco, the heat transfer rate is very slow, and the amount of smoke is not as great as that of resistance-heated smoking devices. In a laboratory environment, the aerosol-generating matrix cannot generate the sufficient and harmonious aroma generated by infrared irradiation. Therefore, to solve the above technical problems, there is a need to provide a new aerosol-generating article for infrared-heated smoking devices. Summary of the Invention [Problem to be solved by the invention]

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

[0006] To achieve the above objectives, the present application provides the following technical solutions:

[0007] The present application provides an aerosol-generating article for an infrared-heated smoking device, comprising a sheet and an aerosol-generating matrix enclosed within the sheet, the sheet satisfying the following formula: ln(TS a ) × D / D0>-2.00 and / or ln(TS b )×D / D0>-0.30 Here, 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 -1The present invention provides an aerosol-generating article for an infrared-heated smoking device, wherein the valley permeability coefficient is in the range of 1 / 2 mm, D is the thickness of the sheet, and D0 is 0.01 mm.

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

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

[0010] Additionally, the aerosol-generating matrix comprises, on a dry weight basis, greater than 80% by weight of tobacco material.

[0011] Furthermore, the tobacco 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. [Effects of the Invention]

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

[0014] In the aerosol-generating article for an infrared-heated smoking device according to the present application, by selecting a sheet of an appropriate thickness according to the characteristics of the sheet, the thermal radiation properties of the infrared-heated smoking device can be maximized, allowing the organic components in the aerosol-generating matrix to undergo a sufficient Maillard reaction, accelerating the rate of heat transfer to the aerosol-generating article, increasing the amount of smoke from the aerosol-generating article, and improving the strength and harmony of the aroma of the aerosol-generating article. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is an infrared transmission spectrum of selected heated cigarette tobacco cut tobacco according to an example of the present application. [Figure 2] 1 is an infrared transmission spectrum of selected tobacco paper #1 according to an example of the present application. [Figure 3] 1 is an infrared transmission spectrum of selected tobacco paper #2 according to an example of the present application. [Figure 4] 1 is an infrared transmission spectrum of selected tobacco paper #3 according to an example of the present application. [Figure 5] 1 is an infrared transmission spectrum of selected tobacco paper #4 according to an example of the present application. [Figure 6] 1 is an infrared transmission spectrum of selected tobacco paper #5 according to an example of the present application. [Figure 7] 1 is an infrared transmission spectrum of selected tobacco paper #6 according to an example of the present application. [Figure 8] 1 is an infrared transmission spectrum of selected tobacco paper #7 according to an example of the present application. [Figure 9] 1 shows the response values ​​of each component in a GC-MS test of the smoke of cigarette #1 according to an example of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0016] The technical solutions in the embodiments of the present application are clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but 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 scope of protection of the present application.

[0017] An embodiment of the present application provides an aerosol-generating article for an infrared-heated smoking device, comprising a sheet and an aerosol-generating matrix wrapped within the sheet. The aerosol-generating article is placed within the infrared-heated smoking device, and when the infrared-heated smoking device heats the aerosol-generating article, a portion of the infrared rays emitted from an infrared heater of the infrared-heated smoking device penetrates the sheet and is absorbed by the aerosol-generating matrix.

[0018] In this application, the relationship between the infrared spectral characteristics of the sheet and the smoke-generating characteristics of the aerosol-generating matrix is ​​quantitatively studied as follows.

[0019] Infrared heating technology primarily studies the interaction mechanism between radiation and material structure. An infrared heating source emits infrared radiation, which is absorbed by the heated material, generating a thermal effect. Matching radiation occurs when the frequency of the infrared radiation irradiated on an object matches the vibrational frequency of the molecules that make up the object, causing the molecules to absorb the infrared energy, resulting in partial matching absorption. This energy exchange between molecules increases the internal energy (vibrational and rotational energy) of the molecules, resulting in a temperature rise. The theory of infrared radiation heating technology is based on the infrared spectrum matching absorption principle proposed by Japanese scholar Hidekatsu Hosokawa. This theory states 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 the photon energy into vibrational and rotational energy of the material's molecules. This lays the foundation for the application of infrared heating technology.

[0020] Through continuous application and updating of technology, Professor Hou Landian has proposed the "partial matching absorption principle," which states that in the infrared band, any radiation that an object can absorb will cause a thermal effect on the object. For thick objects, "non-matching" absorption outside the absorption band can be more important for heating. Far-infrared rays have a certain penetrating power and a penetration depth of several microns to several millimeters, so infrared radiation energy is absorbed not only by molecules on the surface but also by molecules inside the object. Therefore, by selecting the necessary radiation and absorption parameters within the spectrum according to the mechanism of infrared heating technology, objects of a certain thickness can be heated. There are three methods:

[0021] 1. Surface absorption: By adopting optimal radiation wavelength matching, that is, matching the radiation peak band with the absorption peak, the surface material is heated by matching absorption. 2. Both internal and external absorption: The wavelength of the incident radiation is allowed to deviate to various degrees from the wavelength of the absorption peak band, which is called partial matching absorption. 3. Absorption in inner layer: The wavelength of the incident radiation is deviated to avoid absorption in the surface layer, so that the radiation energy reaches and is absorbed in the inner layer material, thereby heating the inner layer material. This is called non-matching absorption.

[0022] Compared to conventional heating methods, infrared heating has the advantages of shortening the time required for heat treatment and heating of the heated object, reducing the energy consumption per unit area of ​​the heated object, and controlling the radiation direction and spatial distribution of radiation. Therefore, by using a technology that combines spectral matching absorption, partial matching absorption, and non-matching absorption in infrared heating to heat low-temperature heated, non-combustible shredded tobacco, uniform heating is achieved, heated smoke is prevented from condensing on unheated shredded tobacco, the smoking time of the first puff is shortened, and heating efficiency is improved.

[0023] A suitable cut tobacco material for infrared-heated non-combustion cigarettes must have the following properties: It is an improved substitute for traditional cigarettes, with a taste and aroma composition similar to traditional cigarettes and a significantly reduced content of harmful substances in the smoke compared to traditional cigarettes. For infrared heating technology, it must have high heat absorption efficiency.

[0024] Suitable tobacco paper for infrared-heated non-combustion cigarettes must have the following properties: Conventional highly reflective anti-leak materials such as aluminum foil should not be used; otherwise, heat will be transferred only by thermal conduction. The tobacco paper must have high infrared light transmittance at the effective wavelength of the tobacco shredded absorption peak. Both tobacco paper and shredded tobacco are primarily made of plant fibers. If the infrared absorption peak of the tobacco paper overlaps significantly with that of the shredded tobacco, the effective wavelength of infrared light acting on the shredded tobacco will be too low, resulting in insufficient matching absorption and the inability to promote the Maillard reaction. The position and height of the infrared absorption peak are closely related not only to the fiber composition of the tobacco paper but also to other auxiliary materials and processing techniques. Therefore, suitable tobacco paper for infrared-heated non-combustion cigarettes can only be selected through sample testing and empirical formulas. [Test example]

[0025] One commercially available heated cigarette was selected, and the tobacco cut from it was used as the test material. The commercially available cigarette used in this study was a slim-type heated cigarette from the CTOM-yin brand produced by Zhejiang Zhongyan.

[0026] Seven types of commercially available tobacco paper were selected and numbered #1 to #7. Number #1 was WAT62GSM brand tobacco paper manufactured by Wattens Paper, Austria; number #2 was WAT37 brand tobacco paper manufactured by Wattens Paper, Austria; number #3 was H5A1 brand tobacco paper manufactured by Schweizer-Mauduit International; number #4 was H5A2 brand tobacco paper manufactured by Schweizer-Mauduit International; number #5 was H5P1 brand tobacco paper manufactured by Schweizer-Mauduit International; number #6 was H5 brand tobacco paper manufactured by Schweizer-Mauduit International; and number #7 was WAT35 brand tobacco paper manufactured by Wattens Paper, Austria.

[0027] Of the commercially available tobacco papers used in this study, tobacco papers #1, #2, and #7 were provided by Wattens Paper GmbH in Austria, and samples are available on the company's official website. Tobacco papers #3, #4, #5, and #6 were provided by Schweizer-Mauduit International GmbH, and samples are available on the company's official website.

[0028] Infrared spectrum detection was performed on the selected heated cigarette cut tobacco and tobacco papers #1 to #7.

[0029] The infrared spectrum is detected by the attenuated total reflection (ATR) method. The infrared spectrometer used is a Thermo Scientific NICOLET380 FTIR with a spectral range of 400–4000 cm. -1 The wavelength range 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 cigarette shredded tobacco and tobacco papers #1 to #7, respectively. The ordinate is transmittance (TS), 1-TS is absorptivity, and the abscissa is wavenumber; 10,000 divided by the wavenumber equals the wavelength (unit: μm).

[0031] Figure 1 shows the infrared transmission spectrum of selected tobacco cuts for heated cigarettes. As can be seen from Figure 1, the infrared transmission spectrum of the tobacco cuts from 3500 to 3000 cm -1 The absorption peaks of NH and -COOH are both in this range, so the amino acid substances in tobacco absorb energy at this absorption peak, resulting in a peak in the 1750–1550 cm -1 Since the absorption peaks of the C=O of aldehydes and ketones are all in this range, the sugar substances in shredded tobacco absorb energy at these absorption peaks.

[0032] Figures 2 to 8 show the infrared transmittance spectra of selected tobacco papers #1 to #7. From these figures, the infrared spectral transmittance curves of each tobacco paper in the range of 3500 to 3000 cm -1 range and 1750-1550 cm -1 The valley permeability coefficients TS (corresponding to the absorption peaks) were obtained in the range of 1000 to 15000, and these are shown in Table 1. Table 1 shows the valley permeability coefficients and paper thicknesses of tobacco papers #1 to #7.

[0033] [Table 1]

[0034] The selected heated tobacco shreds were wrapped in seven types of tobacco paper #1 to #7 to obtain seven types of cigarettes. The specifications of the cigarettes were as follows: the length of the cellulose acetate filter was 7 mm, the cigarette length was 60 mm, and the cigarette diameter was 5.5 mm.

[0035] The seven types of cigarettes listed above were placed in infrared-heated and resistance-heated smoking devices and subjected to heated puff tests. The main heating parameters of the infrared-heated and resistance-heated smoking devices are shown in Table 2. Table 2 shows the "Main heating parameters of infrared-heated and resistance-heated smoking 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] Instruments and equipment: Linear smoking machine: CETI-8 model, Cerlulean, UK; filter: 44 mm Cambridge filter, Whatman, UK; gas chromatograph mass spectrometer: GC-MS2020NX model, Shimadzu, Japan.

[0040] The seven cigarettes were subjected to temperature and humidity equilibration according to the method described in the national standard GB / T 16447-2004, "Atmospheric Environment for the Conditioning and Testing of Cigarettes and Tobacco Products." The temperature was 22±1°C, the relative humidity was 60±3%, and the equilibration time was 48 hours. The seven cigarettes were placed in an infrared-heated smoking device and a resistance-heated smoking device, respectively, and puffed using a linear smoking machine. The puffing parameters were a puff volume of 55 mL, a duration of 3 seconds, and a puff interval of 30 seconds. After starting the heating device, the cigarettes were preheated for 35 seconds. After preheating was complete, the first puff began, with six puffs per cigarette and eight cigarettes per round. Mainstream smoke particulate matter was collected using a 44 mm Cambridge filter. The content of total particulate matter in mainstream smoke was tested according to the method described in the national standard GB / T 19609-2004 "Determination of total particulate matter and tar using a smoking machine for routine analysis of cigarettes."

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

[0042] The GC / MS analysis method is as follows. Chromatography column: Agilent VF-17MS capillary column, 30 m x 0.25 mm x 0.25 μm Inlet temperature: 300℃ Heating program: Initial temperature 50°C, held for 3 minutes, increased at 5°C / min to 150°C, increased at 15°C / min to 300°C, 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 is the rate at which shredded tobacco components are transferred to smoke and is one indicator of 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 removed from six cigarettes #1 and subjected to ultrasonic extraction using 25 mL of methanol solution for 30 minutes. The response values ​​of each component were then tested by GC-MS. The smoke was puffed using a Cerulean smoking machine based on infrared-heated and resistive-heated smoking devices. Using an HCI smoking model, six cigarettes #1 were puffed without blocking the vents. The smoke was then collected using a Cambridge filter, followed by extraction using 25 mL of methanol in a water bath for 30 minutes with shaking. The response values ​​of each component were then 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, cyclopent-4-ene-1,3-dione; 6, 5-methylfurfural; 7, 2(5H)-furanone; 8, VG; 9, MCP; 10, benzyl alcohol; 11, furanone; 12, menthol; 13, methyl furoate; 14, maltol; 15, 2,3-dihydro-3,5-dihydroxy-6-methyl-4H-pyran-4-one; 16, benzoic acid; 17, 2-heptyl benzoate; 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 hexadecanoate; 26, methyl linoleate; 27, methyl linolenate; 28, acetyltributyl citrate; and 29, squalene.

[0044] As can be seen from Figure 9, a total of 29 major smoke components were detected, and most of the smoke components 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 greater amounts in smoke than in cut 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 each puffed using an infrared-heated smoking device and a resistance-heated smoking device, 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 aroma release amount for cigarette #1," Table 4 shows the "typical aroma release amount for cigarette #2," Table 5 shows the "typical aroma release amount for cigarette #3," Table 6 shows the "typical aroma release amount for cigarette #4," Table 7 shows the "typical aroma release amount for cigarette #5," Table 8 shows the "typical aroma release amount for cigarette #6," and Table 9 shows the "typical aroma release amount for 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-heated smoking device was not as good as that emitted by the resistance-heated smoking device. Furthermore, a sensory evaluation conducted by a smoker in accordance with the national standard GB5606.4-2005, "Cigarettes, Part 4, Sensory Technical Requirements," concluded that the aroma was weak. In #3, #4, #5, and #6, the typical aroma emitted by the infrared-heated smoking device was comparable to that emitted by the resistance-heated smoking device and was acceptable to the smoker. A sensory evaluation conducted by a smoker in accordance with the national standard GB5606.4-2005 concluded that the aroma was sufficient. In #2 and #7, the typical aroma emitted by the infrared-heated smoking device was stronger than that emitted by the resistance-heated smoking device and concluded that the aroma was rich.

[0054] By further refining the above conclusions and making inferences based on experience and theory, it was found that the aroma would not be weakened if the tobacco paper satisfied the following formula. ln(TS a ) × D / D0>-2.00 and / or ln(TS b )×D / D0>-0.30 Here, 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 is the valley bottom permeability coefficient in the range of , D is the sheet thickness, and D0 is 0.01 mm.

[0055] Furthermore, if the tobacco paper satisfies the following formula, the fragrance will be sufficient. 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 formula, the aroma will be 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 the present application is not limited to the details of the illustrative examples set forth above, and that the present application can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the examples are to be considered in all respects as illustrative and not limiting, and the scope of the present application is limited by the appended claims, rather than the foregoing description, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims shall not be construed as limiting the scope of such claims.

Claims

1. An aerosol-generating article for an infrared-heated smoking device, comprising: a sheet; and an aerosol-generating matrix enclosed within the sheet, wherein the sheet satisfies the following formula: ln(TS ａ ) x D / D ０ >-2.00 and / or ln(TS ｂ ) x D / D ０ >-0.30 Here, TS ａ is the infrared spectral transmittance curve of the sheet from 3500 to 3000 cm －１ The valley permeability coefficient, TS, in the range ｂ is the infrared spectral transmittance curve of the sheet from 1750 to 1550 cm －１ The valley bottom permeability coefficient in the range of ０ An aerosol-generating article for an infrared-heated smoking device, characterized in that the thickness of the aerosol-generating article is 0.01 mm.

2. The sheet has the following formula: ln(TS ａ ) x D / D ０ >-1.50 and / or ln(TS ｂ ) x D / D ０ >-0.25 2. The aerosol-generating article for an infrared-heated smoking device according to claim 1, wherein the aerosol-generating article satisfies the above.

3. The sheet has the following formula: ln(TS ａ ) x D / D ０ >-1.00 and / or ln(TS ｂ ) x D / D ０ >-0.20 3. The aerosol-generating article for an infrared-heated smoking device according to claim 2, wherein the above-mentioned condition is satisfied.

4. 2. The aerosol-generating article for an infrared-heated smoking device according to claim 1, wherein the aerosol-generating matrix contains, on a dry weight basis, more than 80% by weight of tobacco raw material.

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

6. 6. The aerosol-generating article for an infrared-heated smoking device according to claim 5, wherein the tobacco raw material is one or more of 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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