Aerosol-generating products, manufacturing methods and their applications

Abstract

The aerosol-generating product comprises an aerosol atomization unit and a flue gas cooling unit, the flue gas cooling unit being located downstream of the flue gas flow generated by the aerosol atomization unit, and further comprising a filtration unit located downstream of the smoke flow through the flue gas cooling unit, or a hollow unit located upstream of the smoke flow through the flue gas cooling unit, the structure being formed by a collection of granular material and including gaps for the passage of flue gases.

Description

[Technical field]

[0001] The present invention is in the field of cigarette technology and relates to smoke treatment, in particular to a product for reducing the temperature of tobacco smoke gases. [Background technology]

[0002] As the global tobacco control environment becomes increasingly strict and consumers pay more attention to health, new tobacco products that significantly reduce the amount of harmful substances released from tobacco are becoming the focus of development in the tobacco industry in various countries around the world. Heat-to-burn tobacco is a new type of tobacco product that uses a special heat source to heat cut tobacco (below 400°C) without burning, which can significantly reduce the amount of harmful substances released in smoke. At present, heat-to-burn tobacco generally has the problem of high smoke gas temperature, which causes the irritation and burning sensation of smoke and reduces the comfort of smoking. If the temperature of smoke gas is reduced by adopting traditional technical means of increasing filtration, ventilation and dilution, the smoking amount of the product will be further reduced and the smoking experience of the product will be further affected. Therefore, reducing the temperature of smoke gas of heat-to-burn tobacco is an important technology for heat-to-burn tobacco. Chinese patent CN104203015 discloses an aerosol generating product with an aerosol cooling unit, and the cooling unit of the product is composed of a pleated polylactic acid membrane layer. Chinese patent CN107259638A discloses a low-temperature cigarette with the functions of reducing the temperature of smoke gas and enhancing aroma, including a multi-layer smoking rod made of raw materials such as polyvinyl chloride and polylactic acid. The above-mentioned rod, which can reduce the temperature of smoke gas, mainly reduces the temperature of smoke gas in tobacco products by the glass transition of polymer materials, that is, by transitioning from a glassy state to a highly elastic state to absorb heat. However, when polymers undergo glass transition, they have the problem of melting or fusion bonding, so the polymer material at the end of the aerosol cooling unit that first comes into contact with the smoke gas will quickly undergo severe adhesion and collapse, blocking the pores and preventing the smoke gas from flowing smoothly inside the pleated polymer, reducing the cooling surface area and causing the temperature of the smoke gas to become excessively high. Summary of the Invention [Problem to be solved by the invention]

[0003] SUMMARY OF THE PRESENT EMBODIMENTS Aimed at the above technical requirements and deficiencies of the prior art, it is an object of the present invention to provide an aerosol generating product and related method that can rapidly reduce the temperature of flue gases. [Means for solving the problem]

[0004] In order to achieve the above objectives, the technical solutions adopted by the present invention are as follows:

[0005] The aerosol-generating product comprises an aerosol atomization unit and a flue gas cooling unit, said flue gas cooling unit being located downstream of the flue stream generated by said aerosol atomization unit.

[0006] Additionally, the system further includes a filtration unit located downstream of the smoke flow through the flue gas cooling unit.

[0007] Optionally, the system further includes a hollow unit located upstream of the smoke flow through the smoke gas cooling unit.

[0008] Optionally, said flue gas cooling unit is a structure formed by the assembly of granular material, said structure including interstices for the passage of flue gases and at least one continuous flue gas passageway.

[0009] Optionally, the gap in said flue gas cooling unit for passage of flue gases is a three-dimensional non-linear reticulated gap.

[0010] Optionally, the flue gas cooling unit is strip-shaped.

[0011] Optionally, the void ratio of the flue gas cooling unit is between 40% and 90%.

[0012] Optionally, the smoke gas cooling unit includes base granules, adhesive granules, and a wrapping material, where the adhesive granules and the adhesive granules, the adhesive granules and the base granules, and the base granules and the base granules form contact points to be physically bonded at multiple points, and the wrapping material wraps around the outside to form a porous structure strip.

[0013] Optionally, said granular material is a granular material capable of reducing the temperature of the smoke gases and having a low absorption rate for the active ingredients of the smoke gases.

[0014] Optionally, the base granules are inactive granules or inactivated active granules coated with a membrane layer.

[0015] Optionally, the inert granules have a coating film layer thickness of 0-0.2 mm, and the coating film layer accounts for 0-50% of the mass of the entire granules. Obviously, when the thickness of the coating film layer or the proportion of the mass of the entire granules is zero, it means that the inert granules do not coat the coating film layer;

[0016] When the base granule is an activated granule, it needs to be inactivated, and the inactivated activated granule has an outer coating layer thickness of 0.001-0.2 mm, which accounts for 0.001-50% of the total mass of the granule.

[0017] Optionally, the inert granules have a nicotine adsorbent capacity of 3.0 mg / cm for adsorbing nicotine in aerosol of smoke gas. 3 It is a granule of less than 1.

[0018] Optionally, the inert granules comprise organic or inorganic granules, the inorganic granules comprising aluminum oxide, zirconium oxide, calcium carbonate spheres, glass beads, silicon dioxide, iron, copper, aluminum, gold, platinum, magnesium silicate spheres or calcium sulfate, and the organic granules comprising cellulose acetate, cellulose acetate propionate, cellulose acetate butyrate, microcrystalline cellulose, sucrose powder, starch paste, lactose, powdered sugar, glucose, mannitol, starch, methylcellulose, ethylcellulose, polylactic acid, polyethylene, polypropylene, polyhydroxybutyrate, poly-ε-caprolactone, polyglycolic acid, polyhydroxyalkanoates or starch-based thermoplastics.

[0019] Optionally, the active granules have a nicotine adsorption capacity of 3.0 mg / cm for adsorbing nicotine in aerosol of smoke gas. 3 The above are the granules.

[0020] Optionally, the active granules comprise molecular sieves, activated carbon, diatomaceous earth, zeolite, perlite, ceramic, meerschaum, bleaching earth or ion exchange resins, and the inert granules comprise aluminum oxide, zirconium oxide, calcium carbonate spheres, glass beads, silicon dioxide, iron, copper, aluminum, gold, platinum, magnesium silicate spheres or calcium sulfate.

[0021] Optionally, the membrane layer comprises a deposition material.

[0022] Optionally, the deposition material comprises cellulose acetate, cellulose acetate propionate, cellulose acetate butyrate, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, methyl cellulose, ethyl cellulose, polyvinylpyrrolidone, polyethylene ethylene diethylamine acetate, styrene maleic acid copolymer, styrene-vinylpyridine copolymer, cellulose acetate phthalate, methylhydroxypropyl cellulose phthalate, cellulose acetate / polyethylene glycol, methyl cellulose / polyethylene glycol, carboxymethyl cellulose / polyethylene glycol, hypromellose / polyethylene glycol, ethyl cellulose / polyethylene glycol or acrylic resin / polyethylene glycol or polylactic acid.

[0023] Optionally, the shape of the base granules includes spherical, semi-spherical, cake-like, flaky, strip-like, needle-like, polygonal, faceted or random shape.

[0024] Optionally, the base granules have an average diameter in at least one dimension of from a lower limit of 50 microns, 100 microns, 150 microns, 200 microns or 250 microns to an upper limit of 5000 microns, 2000 microns, 1000 microns, 900 microns or 700 microns.

[0025] Optionally, the adhesive granules comprise at least one selected from polyethylene, polypropylene (D7), polylactic acid, polyolefins, polyesters, polyamides, polyacrylic acid, polyvinyl compounds, polytetrafluoroethylene, polyetheretherketone, polyethylene terephthalate, polybutylene terephthalate, polycyclohexamethylene terephthalate, polytrimethylene terephthalate, polyacrylic acid, polymethyl methacrylate, acrylonitrile-butadiene-styrene, styrene-acrylonitrile, styrene-butadiene, styrene-maleic acid, cellulose acetate, cellulose acetate butyrate, plasticized cellulose plastics, cellulose propionate, ethyl cellulose, any derivatives thereof, or any copolymers thereof, and combinations thereof.

[0026] Optionally, the shape of the adhesive granules includes spherical, star-shaped, granular, potato-shaped, irregular shapes and combinations thereof.

[0027] Optionally, the adhesive granules have an average diameter in at least one dimension of from a lower limit of 5 microns, 10 microns, 50 microns, 100 microns or 150 microns to an upper limit of 500 microns, 400 microns, 300 microns, 250 microns or 200 microns.

[0028] Optionally, the adhesive granules have a density of about 0.10 g / cm 3 ~about 0.55g / cm 3and any subset therebetween (e.g., about 0.17 g / cm 3 ~about 0.50g / cm 3 or about 0.20 g / cm 3 ~Approx. 0.47g / cm 3 ).

[0029] The wrapping material is a molded paper weighing 20-40g and having a thickness of 0.08-0.12mm.

[0030] Application of the above aerosol generating products to heat-not-burn tobacco.

[0031] Compared with the reference aerosol-generating product equipped with an acetate tow filter rod, the aerosol-generating product including the smoke gas cooling functional unit of the present invention has a better cooling effect, reducing the temperature by at least 2°C.

[0032] Compared with the reference cigarette 3R4F, the aerosol-generating product including the smoke gas cooling unit of the present invention has a better adsorption effect on phenol, and the reduction can reach 93.2%.

[0033] The present invention provides an aerosol generating product with a unit having a smoke gas cooling function. The product includes a plurality of units, which are formed by combining strips in a strip composite molding. The units include an aerosol atomization unit and a smoke gas cooling unit located downstream of the aerosol atomization unit in the composite molding product. The smoke gas cooling unit is composed of a coated porous material containing basic granules in some applications. The porous material has a porosity of 40% to 90% and prolongs a closing pressure drop of less than 2 mmH2O / mm. The smoke gas cooling unit includes basic granules and a polymer adhesive. After mixing the basic granules and the polymer adhesive, they are heated to bond the basic granules and the adhesive, and between the adhesive and the adhesive at multiple contact points to form a coated elongated porous material. When the aerosol of the heated non-combustible cigarette passes through the cooling unit, the surface film layer of the basic granules and the adhesive undergo a phase change and heat absorption, and the internal material of the cooling unit has a three-dimensional structure to conveniently transfer heat energy laterally, thereby achieving a better cooling effect. In addition, the porous material maintains its original shape and ensures the smooth passage of smoke gas. The porous material has through holes, which ensures the flow of smoke gas while maintaining low intake resistance and a large cooling area, improving the smoking consumer experience. [Brief description of the drawings]

[0034] [Figure 1] FIG. 1 is a schematic diagram of a two-stage aerosol generating product equipped with a unit for reducing the temperature of flue gases according to the present invention. [Diagram 2] FIG. 2 is a schematic diagram of a three-stage aerosol generating product equipped with a unit for reducing the temperature of the flue gases according to the present invention. [Diagram 3] FIG. 3 is a schematic diagram of a four-stage aerosol generating product equipped with a unit for reducing the temperature of the flue gases according to the present invention. [Figure 4] FIG. 4 is a schematic diagram of a four-stage aerosol generating product equipped with a unit for reducing the temperature of the flue gases according to the present invention. [Diagram 5]FIG. 5 is a schematic diagram of a current state of the art four-stage aerosol generating product (reference sample with acetate tow). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0035] The present invention relates to an aerosol-generating product and related methods that can rapidly reduce the temperature of flue gases.

[0036] The aerosol generating product is formed by combining rods in a rod composite molding, the units including an aerosol atomization unit and a flue gas cooling unit located downstream of the aerosol atomization unit. The flue gas cooling unit is, in some applications, composed of a coated porous material containing cellulose acetate granules. The porous material has through holes in the longitudinal and transverse directions, a porosity of 40% to 90%, an areal loading rate of cellulose acetate granules of at least 5 mg / mm, and a closing pressure drop of less than 2 mmH2O / mm. The aerosol passing through the flue gas cooling unit is cooled.

[0037] The void volume of a porous material is the remaining free space after the cellulose acetate granules occupy the space. To determine the void volume, first calculate the average upper and lower diameter limits of the cellulose acetate granules based on their particle size, then use a cellulose acetate density meter to calculate the volume (assuming a spherical shape based on the average diameter). The void ratio is calculated using the formula in Chinese patent CN103330283.

[0038] The term "closure pressure drop" as used herein refers to the static pressure difference between the two ends of a sample when airflow is passed through the sample at the outlet end resulting in a volumetric flow rate of 17.5 mL / sec under stable conditions, and when the sample is completely sealed in the measurement device and no airflow is allowed through the package. For the present invention, the closure pressure drop was measured according to CORESTA ("Collaborating Center for Tobacco Science Research") Recommended Method 41, published in June 2007. A higher closure pressure drop means that the smoker must use more force to smoke.

[0039] The present invention is further explained below in conjunction with figures and embodiments.

[0040] Example 1 As shown in Fig. 1, the two-stage aerosol-generating product 10 with a unit for reducing the temperature of smoke gas according to the present invention includes two units, an aerosol atomization unit 20 and a smoke gas cooling unit 30. The two units are sequentially and coaxially assembled to a rod 11 with cigarette paper 50 in a rod-combined cigarette making machine. The aerosol atomization unit 20 is located at the most distal end 13 of the rod, and the smoke gas cooling unit 30 is downstream of the aerosol atomization unit, and the rod 11 has a mouth end 12. When the rod 11 is combined in the cigarette making machine, the rod 11 has a length of about 45 mm, an outer diameter of about 7.2 mm and an inner diameter of about 6.9 mm.

[0041] The aerosol atomization unit 20 includes a filamentary or pleated tobacco material that is rolled by a cigarette making machine to form a rod and wrapped with filter paper (not shown) and includes additives, such as glycerin and propylene glycol, for forming an aerosol.

[0042] The smoke gas cooling unit 30 is located downstream of the aerosol atomization unit and is a porous strip containing cellulose acetate granules and wrapped in forming paper 31. The porous strip has a length of about 33 mm, an outer diameter of about 7.2 mm, and an inner diameter of about 6.9 mm. In this embodiment, the smoke gas cooling unit is formed by heat bonding cellulose acetate granules and ultra-high molecular weight polyethylene adhesive coated with a membrane layer under specific conditions. The ultra-high molecular weight polyethylene adhesive mechanically bonds the granules to the adhesive granules at multiple contact points at its melting temperature. The adhesive has little flow at its melting temperature, ensuring the penetration of gaps formed between the granules to form multiple passageways extending along the length of the smoke gas cooling unit 30. The porous strip is made of 25 wt% GUR2105 produced by Ticona, LLC and cellulose acetate granules (average diameter 1.2 mm, 75 wt%) wrapped by a polyethylene glycol / hydroxypropylmethylcellulose membrane layer. The porous rods are manufactured by mixing GUR2015 resin with cellulose acetate granules and then filling the heated mixture into a mould without applying pressure (free sintering). After heating the mould at 200°C for 40 minutes, the porous rods are removed from the mould, cooled and wrapped in moulding paper 31 weighing 20g and having a thickness of 0.08mm. The rods are cut to the same length.

[0043] The flue gas cooling unit contains 10 mg / mm cellulose acetate granules, has a closing pressure drop of 5.5 mm H2O, and a void ratio of 72%.

[0044] The aerosol-generating product shown in Figure 1 has a heating element inserted into the side of the aerosol atomization unit to heat the tobacco material in the aerosol atomization unit and release volatile compounds from the tobacco material. When a consumer smokes at the mouth end 12 of the aerosol-generating product 10, these volatile compounds are condensed and atomized to form an aerosol, which is then conveyed to the consumer's mouth via the rod 11. The aerosol is inhaled and heat exchanged through the smoke gas cooling unit 30 to reduce the temperature of the aerosol.

[0045] Smoking is mimicked according to the smoking model specified in the national standard GB / T19609-2004, and the Canadian deep-cough smoking mode (HCI) is adopted. The effect of the smoke gas cooling unit on the temperature of the aerosol mainstream of each oral smoke is investigated and compared with a reference aerosol-generating product containing acetate tow (see Figure 5). The thermocouple temperature probe is located at the mouth end, 5 mm away from the center of the filter tip 40. The test results are shown in Table 1.

[0046] Table 1. Test results for the temperature of the mainstream aerosol [Table 1]

[0047] Example 2 As shown in Fig. 2, the three-stage aerosol generating product 10 with a unit for reducing the temperature of smoke gas according to the present invention includes three units, namely, an aerosol atomization unit 20, a smoke gas cooling unit 30 and a filter tip 40. The aerosol atomization unit 20 is located at the most distal end 13 of the rod, the smoke gas cooling unit 30 is downstream of the aerosol atomization unit, the filter tip 40 is downstream of the smoke gas cooling unit, and the rod 11 has a mouth end 12. The three units are wrapped tightly by cigarette paper 50 and assembled sequentially and coaxially into the rod 11. When the rod 11 is assembled, the rod 11 has a length of about 45 mm, an outer diameter of about 7.2 mm and an inner diameter of about 6.9 mm.

[0048] The aerosol atomization unit 20 includes a filamentary or pleated tobacco material that is rolled by a cigarette making machine to form a rod and wrapped with filter paper (not shown) and includes additives, such as glycerin and propylene glycol, for forming an aerosol.

[0049] The fume cooling unit 30 is adjacent to the downstream side of the aerosol atomization unit 20 and is a porous rod containing cellulose acetate granules and is wrapped by forming paper 31. In this embodiment, the fume cooling unit is formed by heat bonding cellulose acetate granules and ultra-high molecular weight polyethylene adhesive coated with a membrane layer under specific conditions. The ultra-high molecular weight polyethylene adhesive mechanically bonds the granules to the adhesive granules at multiple contact points at its melting temperature. The adhesive has little flow at its melting temperature, ensuring the penetration of gaps formed between the granules to form multiple passageways extending along the length of the fume cooling unit 30. The porous rod is made of 25 wt% GUR2105 produced by Ticona, LLC and cellulose acetate granules (average diameter 1.2 mm, 75 wt%) wrapped by a polyethylene glycol / hydroxypropylmethylcellulose membrane layer. The porous rods are manufactured by mixing GUR2015 resin with cellulose acetate granules and then filling the heated mixture into a mould without applying pressure (free sintering). After heating the mould at 200°C for 40 minutes, the porous rods are removed from the mould, cooled and wrapped in moulding paper 31 weighing 20g and having a thickness of 0.08mm. The rods are cut to the same length.

[0050] The perforated rod flue gas cooling unit contained 10 mg / mm cellulose acetate granules, had a length of about 25 mm, an outer diameter of about 7.2 mm, an inner diameter of about 6.9 mm, a closing pressure drop of 4.2 mm H2O and a void ratio of 72%.

[0051] The filter tip 40 is made of conventional acetate tow rod and has a length of 8 mm, an outer diameter of about 7.2 mm, and an inner diameter of about 6.9 mm.

[0052] 2 has a heating element inserted into the side of the aerosol atomization unit to heat the tobacco material in the aerosol atomization unit and release volatile compounds from the tobacco material. When a consumer smokes at the mouth end 12 of the aerosol-generating product 10, these volatile compounds are condensed and atomized to form an aerosol, which is then transported to the consumer's mouth via the rod 11.

[0053] The heat exchange of the aerosol through the smoke gas cooling unit 30 not only reduces the temperature of the aerosol and blocks the moisture in the aerosol, but also improves the filtering efficiency of the phenol in the aerosol.

[0054] Smoking is imitated according to the smoking model specified in the national standard GB / T19609-2004, and the Canadian deep smoking mode (HCI) is adopted. A Cambridge filter is used to block classified substances, and phenols are quantitatively measured by HPLC fluorescence. The effects of the smoke gas cooling unit on the temperature of the aerosol mainstream of each oral smoke and the total content of phenols in the aerosol mainstream were investigated and compared with a reference aerosol generating product containing an acetate tow cooling unit and a reference cigarette 3R4F (see Figure 5). The thermocouple temperature probe is located at the mouth end, 5 mm away from the center of the filter tip 40. The test results are shown in Tables 2 and 3.

[0055] Table 2. Test results for the temperature of the mainstream aerosol [Table 2]

[0056] Table 3 Comparative test for total phenol content [Table 3]

[0057] Example 3 As shown in Fig. 3, the four-stage aerosol generating product 10 with a unit for reducing the temperature of smoke gas according to the present invention includes four units, namely, an aerosol atomization unit 20, a hollow cellulose acetate tube 60, a smoke gas cooling unit 30 and a filter tip 40. The four units are tightly wrapped by cigarette paper 50 and assembled sequentially and coaxially to a rod 11. The aerosol atomization unit 20 is located at the most distal end 13 of the rod, the hollow cellulose acetate tube 60 is downstream of the aerosol atomization unit, the smoke gas cooling unit 30 is downstream of the hollow cellulose acetate tube, the filter tip 40 is downstream of the smoke gas cooling unit, and the rod 11 has a mouth end 12. When the rod 11 is combined in a cigarette making machine, the rod 11 has a length of about 45 mm, an outer diameter of about 7.2 mm and an inner diameter of about 6.9 mm. The aerosol atomization unit 20 includes a filament or pleated tobacco material that is rolled by a cigarette making machine to form a rod and wrapped with filter paper (not shown). The tobacco material includes additives, including glycerin and propylene glycol, for forming an aerosol. A hollow cellulose acetate tube 60 is adjacent to the downstream side of the aerosol atomization unit and is made of cellulose acetate. The aerosol is first mixed in the hollow section and then buffer cooled.

[0058] The flue gas cooling unit 30 is adjacent to the downstream side of the hollow tube 60 and is a perforated strip containing cellulose acetate granules. In this embodiment, the flue gas cooling unit 30 is formed by heat bonding cellulose acetate granules covered with a membrane layer and ultra-high molecular weight polyethylene adhesive under specific conditions. The ultra-high molecular weight polyethylene adhesive mechanically bonds the granules to the adhesive granules at multiple contact points at its melting temperature. The adhesive has little flow at its melting temperature, ensuring the penetration of gaps formed between the granules to form multiple passageways extending along the length of the flue gas cooling unit 30. The perforated strip is made of 25 wt% GUR2105 manufactured by Ticona, LLC and cellulose acetate granules (average diameter 1.2 mm, 75 wt%) encased by a polyethylene glycol / hydroxypropylmethylcellulose membrane layer. The porous rods are manufactured by mixing GUR2015 resin with cellulose acetate granules and then filling the heated mixture into a mould without applying pressure (free sintering). After heating the mould at 200°C for 40 minutes, the porous rods are removed from the mould, cooled and wrapped in moulding paper 31 weighing 20g and having a thickness of 0.08mm. The rods are cut to the same length.

[0059] The flue gas cooling unit contains 10 mg / mm cellulose acetate granules, has a closing pressure drop of 3 mm H2O and a void ratio of 72%.

[0060] The filter tip 40 is a conventional cellulose acetate rod having a length of 8 mm, an outer diameter of about 7.12 mm, and an inner diameter of about 6.9 mm.

[0061] Hollow tube 60 is made of cellulose acetate and has a length of 7 mm, an outer diameter of about 7.12 mm and an inner diameter of about 3.5 mm.

[0062] The aerosol-generating product shown in Figure 3 has a heating element inserted into the side of the aerosol atomization unit to heat the tobacco material in the aerosol atomization unit and release volatile compounds from the tobacco material. When a consumer smokes at the mouth end 12 of the aerosol-generating product 10, these volatile compounds are condensed and atomized to form an aerosol, which is then transported to the consumer's mouth via the rod 11.

[0063] The heat exchange of the aerosol through the smoke gas cooling unit 30 not only reduces the temperature of the aerosol and blocks the moisture in the aerosol, but also improves the filtering efficiency of the phenol in the aerosol.

[0064] Smoking is imitated according to the smoking model specified in the national standard GB / T19609-2004, and the Canadian deep smoking mode (HCI) is adopted. A Cambridge filter is used to block classified substances, and phenols are quantitatively measured by HPLC fluorescence. The effects of the smoke gas cooling unit on the temperature of the aerosol mainstream of each oral smoke and the total content of phenols in the aerosol mainstream were investigated and compared with a reference aerosol generating product containing an acetate tow cooling unit and a reference cigarette 3R4F (see Figure 5). The thermocouple temperature probe is located at the mouth end, 5 mm away from the center of the filter tip 40. The test results are shown in Tables 4 and 5.

[0065] Table 4. Test results for the temperature of the mainstream aerosol [Table 4]

[0066] Table 5 Comparative test for total phenol content [Table 5]

[0067] Example 4 As shown in Fig. 4, the four-stage aerosol-generating product 10 with a unit for reducing the temperature of smoke gas according to the present invention includes four units, namely, an aerosol atomization unit 20, a smoke gas cooling unit 30, a pleated and gathered polylactic acid membrane layer sheet 70, and a filter tip 40. The four units are tightly wrapped by cigarette paper 50 and assembled sequentially and coaxially to a strip rod 11. The aerosol atomization unit 20 is located at the most distal end 13 of the strip rod, the smoke gas cooling unit 30 is downstream of the aerosol atomization unit, the pleated and gathered polylactic acid membrane layer sheet 70 is downstream of the smoke gas cooling unit, the filter tip 40 is downstream of the gathered polylactic acid membrane layer sheet, and the strip rod 11 has a mouth end 12. When the strip rod 11 is combined in a cigarette making machine, the strip rod 11 has a length of about 45 mm, an outer diameter of about 7.2 mm, and an inner diameter of about 6.9 mm.

[0068] The aerosol atomization unit 20 includes a filamentary or pleated tobacco material that is rolled by a cigarette making machine to form a rod and wrapped with filter paper (not shown) and includes additives, such as glycerin and propylene glycol, for forming an aerosol.

[0069] The smoke gas cooling unit 30 is adjacent to the downstream side of the aerosol atomization unit and is a porous strip containing cellulose acetate granules. The porous strip has a length of about 7 mm, an outer diameter of about 7.2 mm, and an inner diameter of about 6.9 mm. In this embodiment, the smoke gas cooling unit is formed by heat bonding cellulose acetate granules covered with a membrane layer and an ultra-high molecular weight polyethylene adhesive under specific conditions. The ultra-high molecular weight polyethylene adhesive mechanically bonds the granules to the adhesive granules at multiple contact points at its melting temperature. The adhesive has little flow at its melting temperature, ensuring the penetration of gaps formed between the granules to form multiple passageways extending along the length of the smoke gas cooling unit 30. The porous strip is made of 25 wt% GUR2105 manufactured by Ticona, LLC and cellulose acetate granules (average diameter 1.2 mm, 75 wt%) wrapped by a polyethylene glycol / hydroxypropylmethylcellulose membrane layer. The porous rods are manufactured by mixing GUR2015 resin with cellulose acetate granules and then filling the heated mixture into a mould without applying pressure (free sintering). After heating the mould at 200°C for 40 minutes, the porous rods are removed from the mould, cooled and wrapped in moulding paper 71 weighing 20g and having a thickness of 0.08mm. The rods are cut to the same length.

[0070] The flue gas cooling unit contained 10 mg / mm cellulose acetate granules, had a length of 7 mm, a closing pressure drop of 1.2 mm H2O and a void ratio of 72%.

[0071] The pleated and gathered polylactic acid membrane layer sheet 70 has a length of 18 mm, an outer diameter of about 7.2 mm and an inner diameter of about 6.9 mm. The thickness of the polylactic acid membrane layer sheet is 50 μm.

[0072] The filter tip 40 is a conventional cellulose acetate rod having a length of 8 mm, an outer diameter of about 7.12 mm, and an inner diameter of about 6.9 mm.

[0073] The aerosol-generating product shown in Figure 4 has a heating element inserted into the side of the aerosol atomization unit to heat the tobacco material in the aerosol atomization unit and release volatile compounds from the tobacco material. When a consumer smokes at the mouth end 12 of the aerosol-generating product 10, these volatile compounds are condensed and atomized to form an aerosol, which is then conveyed to the consumer's mouth via the rod 11. The aerosol is inhaled and heat exchanged through the smoke gas cooling unit 30 to reduce the temperature of the aerosol.

[0074] Smoking is mimicked according to the smoking model specified in the national standard GB / T19609-2004, and the Canadian deep-cough smoking mode (HCI) is adopted. The effect of the smoke gas cooling unit on the temperature of the aerosol mainstream of each oral smoke is investigated and compared with a reference aerosol-generating product containing an acetate tow cooling unit. The thermocouple temperature probe is located at the mouth end, 5 mm away from the center of the filter tip 40. The test results are shown in Table 6.

[0075] Table 6. Test results for the temperature of the mainstream aerosol [Table 6]

[0076] Example 5 As shown in Fig. 3, the four-stage aerosol generating product 10 with a unit for reducing the temperature of smoke gas according to the present invention includes four units, namely, an aerosol atomization unit 20, a hollow cellulose acetate tube 60, a smoke gas cooling unit 30 and a filter tip 40. The four units are tightly wrapped by cigarette paper 50 and assembled sequentially and coaxially to a rod 11. The aerosol atomization unit 20 is located at the most distal end 13 of the rod, the hollow cellulose acetate tube 60 is downstream of the aerosol atomization unit, the smoke gas cooling unit 30 is downstream of the hollow cellulose acetate tube, the filter tip 40 is downstream of the smoke gas cooling unit, and the rod 11 has a mouth end 12. When the rod 11 is combined in a cigarette making machine, the rod 11 has a length of about 45 mm, an outer diameter of about 7.2 mm and an inner diameter of about 6.9 mm. The aerosol atomization unit 20 includes a filament or pleated tobacco material that is rolled by a cigarette making machine to form a rod and wrapped with filter paper (not shown). The tobacco material includes additives, including glycerin and propylene glycol, for forming an aerosol. A hollow cellulose acetate tube 60 is adjacent to the downstream side of the aerosol atomization unit and is made of cellulose acetate. The aerosol is first mixed in the hollow section and then buffer cooled.

[0077] The fume cooling unit 30 is adjacent to the downstream side of the hollow tube 60 and is a perforated strip containing cellulose acetate granules. In this embodiment, the fume cooling unit 30 is formed by heat bonding the cellulose acetate granules covered with a membrane layer and an ultra-high molecular weight polyethylene adhesive under certain conditions. The ultra-high molecular weight polyethylene adhesive mechanically bonds the granules to the adhesive granules at multiple contact points at its melting temperature. The adhesive has little flow at its melting temperature, ensuring the penetration of gaps formed between the granules to form multiple passageways extending along the length of the fume cooling unit 30. The perforated strip is made of cellulose acetate granules (average diameter 1.2 mm, 75 wt%), surrounded by a hypromellose membrane layer and 25 wt% GUR2105 produced by Ticona, LLC. The porous rods are manufactured by mixing GUR2015 resin with cellulose acetate granules and then filling the heated mixture into a mould without applying pressure (free sintering). After heating the mould at 200°C for 40 minutes, the porous rods are removed from the mould, cooled and wrapped in moulding paper 31 weighing 20g and having a thickness of 0.08mm. The rods are cut to the same length.

[0078] The flue gas cooling unit contained 8.6 mg / mm cellulose acetate granules, had a closing pressure drop of 4.7 mm H2O and a void ratio of 73.6%.

[0079] The filter tip 40 is a conventional cellulose acetate rod having a length of 8 mm, an outer diameter of about 7.12 mm, and an inner diameter of about 6.9 mm.

[0080] Hollow tube 60 is made of cellulose acetate and has a length of 7 mm, an outer diameter of about 7.12 mm and an inner diameter of about 3.5 mm.

[0081] The aerosol-generating product shown in Figure 3 has a heating element inserted into the side of the aerosol atomization unit to heat the tobacco material in the aerosol atomization unit and release volatile compounds from the tobacco material. When a consumer smokes at the mouth end 12 of the aerosol-generating product 10, these volatile compounds are condensed and atomized to form an aerosol, which is then transported to the consumer's mouth via the rod 11.

[0082] The aerosol is drawn through a flue gas cooling unit 30 for heat exchange, thereby reducing the temperature of the aerosol.

[0083] Smoking is mimicked according to the smoking model specified in the national standard GB / T19609-2004, and the Canadian deep-cough smoking mode (HCI) is adopted. The effect of the smoke gas cooling unit on the temperature of the aerosol mainstream of each oral smoke is investigated and compared with a reference aerosol generating product containing an acetate tow cooling unit (see Figure 5). The thermocouple temperature probe is located at the mouth end, 5 mm away from the center of the filter tip 40. The test results are shown in Table 7.

[0084] Table 7. Test results for the temperature of the mainstream aerosol [Table 7]

[0085] 5, the current four-stage aerosol generating product 10 (reference sample) includes four units: an aerosol atomization unit 20, a hollow cellulose acetate tube 60, a high single denier cellulose acetate filter rod 72, and a filter tip 40. The aerosol atomization unit 20 is located at the most distal end 13 of the rod, the hollow cellulose acetate tube 60 is downstream of the aerosol atomization unit, the high single denier cellulose acetate filter rod 72 is downstream of the hollow cellulose acetate tube 60, the filter tip 40 is downstream of the high single denier cellulose acetate filter rod 72, and the rod 11 has a mouth end 12. The four units are tightly wrapped by cigarette paper 50 and assembled to the rod 11 sequentially and coaxially.

[0086] The above description of the embodiments is for those skilled in the art to easily understand and apply the present invention. Those skilled in the art can obviously make various modifications to the present embodiments, and can apply the general principles described in the present invention to other embodiments without creative efforts. Therefore, the present invention is not limited to the present embodiments. All improvements and modifications made by those skilled in the art without departing from the scope of the present invention through the disclosure of the present invention should be included within the protection scope of the present invention. [Explanation of symbols]

[0087] 10 Aerosol-generating products 11 bar 20 Aerosol atomization unit 30 Smoke gas cooling unit

Claims

1. an aerosol atomization unit and a smoke gas cooling unit, the smoke gas cooling unit being located downstream of the smoke flow generated by the aerosol atomization unit; the flue gas cooling unit is a structure formed by the assembly of granular material, the structure including gaps for flue gas passage and at least one continuous flue gas passageway; The smoke gas cooling unit includes base granules, adhesive granules, and a wrapping material, and the adhesive granules and the adhesive granules, the adhesive granules and the base granules, and the base granules and the base granules form contact points to be physically bonded at a plurality of points, and the wrapping material wraps around the outside to form a strip having a porous structure; The smoke gas cooling unit comprises a porous material having longitudinal and transverse through holes through which the aerosol can pass; 1. An aerosol-generating product, characterized in that the base granules are inert granules or inactivated active granules coated with a membrane layer.

2. 2. The aerosol-generating product of claim 1, further comprising a filtration unit located downstream of the smoke flow through the smoke gas cooling unit.

3. 3. The aerosol-generating product of claim 2, further comprising a hollow unit located upstream of the smoke flow through the smoke gas cooling unit.

4. 4. The aerosol-generating product of claim 3, wherein the gaps in the flue gas cooling unit through which the flue gas passes are three-dimensional nonlinear mesh gaps.

5. 4. An aerosol-generating product as claimed in claim 3, characterized in that the smoke gas cooling unit is strip-shaped.

6. 6. The aerosol-generating product according to claim 5, wherein the void ratio of the smoke gas cooling unit is between 40% and 90%.

7. 3. The aerosol-generating product according to claim 2, wherein the granular material is capable of reducing the temperature of smoke gas and has a low absorption rate for the active ingredients of the smoke gas.

8. The aerosol-generating product of claim 1, wherein the inactive granules have an outer membrane layer with a thickness of 0-0.2 mm, the membrane layer accounting for 0-50% of the total mass of the granule, and the inactivated active granules have an outer membrane layer with a thickness of 0.001-0.2 mm, the membrane layer accounting for 0.001-50% of the total mass of the granule.

9. The inert granules have a concentration of 3.0 mg / cm in the smoke gas aerosol. ３ 2. The aerosol-generating product of claim 1, which is a granule that adsorbs less than 1000 mg of nicotine.

10. 2. The aerosol-generating product of claim 1, wherein the inert granules comprise organic or inorganic granules, the inorganic granules comprising aluminum oxide, zirconium oxide, calcium carbonate spheres, glass beads, silicon dioxide, iron, copper, aluminum, gold, platinum, magnesium silicate spheres or calcium sulfate, and the organic granules comprising cellulose acetate, cellulose acetate propionate, cellulose acetate butyrate, microcrystalline cellulose, sucrose powder, starch paste, lactose, powdered sugar, glucose, mannitol, starch, methylcellulose, ethylcellulose, polylactic acid, polyethylene, polypropylene, polyhydroxybutyrate, poly-ε-caprolactone, polyglycolic acid, polyhydroxyalkanoate or a starch-based thermoplastic resin.

11. The active granules have a concentration of 3.0 mg / cm in the smoke gas aerosol. ３ 2. The aerosol-generating product according to claim 1, which is a nicotine-adsorbing granule.

12. 2. The aerosol-generating product of claim 1, wherein the active granules comprise molecular sieves, activated carbon, diatomaceous earth, zeolite, perlite, ceramic, meerschaum, bleaching earth or ion exchange resin, and the inert granules comprise aluminum oxide, zirconium oxide, calcium carbonate spheres, glass beads, silicon dioxide, iron, copper, aluminum, gold, platinum, magnesium silicate spheres or calcium sulfate.

13. 2. The aerosol-generating product of claim 1, wherein the film layer is made of a film-forming material.

14. 14. The aerosol-generating product of claim 13, wherein the film-forming material comprises cellulose acetate, cellulose acetate propionate, cellulose acetate butyrate, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, methyl cellulose, ethyl cellulose, polyvinylpyrrolidone, polyethylene ethylene diethylamine acetate, styrene maleic acid copolymer, styrene-vinylpyridine copolymer, cellulose acetate phthalate, methyl hydroxypropyl cellulose phthalate, cellulose acetate / polyethylene glycol, methyl cellulose / polyethylene glycol, carboxymethyl cellulose / polyethylene glycol, hypromellose / polyethylene glycol, ethyl cellulose / polyethylene glycol, acrylic resin / polyethylene glycol, or polylactic acid.

15. 2. The aerosol-generating product of claim 1, wherein the shape of the base granules includes spherical, semi-spherical, mochi-like, flaky, strip-like, needle-like, polygonal, faceted or random shapes.

16. 2. The aerosol-generating product of claim 1, wherein the base granules have an average diameter in at least one dimension of from a lower limit of 50 microns, 100 microns, 150 microns, 200 microns or 250 microns to an upper limit of 5000 microns, 2000 microns, 1000 microns, 900 microns or 700 microns.

17. 7. The aerosol-generating product of claim 6, wherein the adhesive granules comprise at least one selected from polyethylene, polypropylene, polylactic acid, polyolefin, polyester, polyamide, polyacrylic acid, polyvinyl compound, polytetrafluoroethylene, polyetheretherketone, polyethylene terephthalate, polybutylene terephthalate, polycyclohexamethylene terephthalate, polytrimethylene terephthalate, polyacrylic acid, polymethyl methacrylate, acrylonitrile-butadiene-styrene, styrene-acrylonitrile, styrene-butadiene, styrene-maleic acid, cellulose acetate, cellulose acetate butyrate, plasticized cellulose plastics, cellulose propionate, ethyl cellulose, any derivative thereof, or any copolymer thereof, and combinations thereof.

18. 7. The aerosol-generating product of claim 6, wherein the shapes of the adhesive granules include spherical, star-shaped, granular, potato-shaped, irregular shapes and combinations thereof.

19. 7. The aerosol-generating product of claim 6, wherein the adhesive granules have an average diameter in at least one dimension of from a lower limit of 5 microns, 10 microns, 50 microns, 100 microns or 150 microns to an upper limit of 500 microns, 400 microns, 300 microns, 250 microns or 200 microns.

20. 7. The aerosol-generating product according to claim 6, wherein the proportion of the adhesive granules in the porous cooling portion is between 0.1% and 99%, and the content of the base granules is between 1% and 99%.

21. 7. The aerosol-generating product according to claim 6, wherein the proportion of the adhesive granules in the porous cooling portion is between 15% and 33%.

22. 7. An aerosol-generating product according to claim 6, characterized in that the content of the base granules is between 67% and 85%.

23. 7. An aerosol-generating product according to claim 6, wherein the wrapping material is a molded paper weighing 20-40 g and having a thickness of 0.08-0.12 mm.

24. 24. A method for reducing the temperature of smoke gases from a heated non-combustible tobacco product using an aerosol-generating product according to any one of claims 1 to 23.

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