A heat-not-burn tobacco product with capsules and a preparation process

Abstract

The present invention belongs to the technical field of heat-not-burn tobacco products, and provides a heat-not-burn tobacco product with capsules and a preparation process, the tobacco product includes a pipe, the pipe body is composed of a smoke-generating substrate segment and a mouthpiece segment with capsules, the mouthpiece segment includes a acetate fiber segment relatively far away from the smoke-generating substrate segment and an empty tube segment accommodating a number of capsules; each of the capsules includes a closed cavity formed by combining a first flexible film and a second flexible film, and a fragrance stored in the cavity; the thickness of the first flexible film and the second flexible film is independently 5-100 microns, the two layers of film have different heat shrinkage rates, and are automatically ruptured by heat to gradually release the fragrance of the fragrance. The novel heat-not-burn tobacco product provided by the present invention can be applied to various spices, can slowly release effective characteristic fragrance components during the suction process, ensure the uniformity of each puff of suction, and does not require the user to manually apply external force and other additional operations, which is conducive to application.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat-not-burn tobacco products, and in particular relates to a heat-not-burn tobacco product with a capsule and a preparation process thereof. Background Art

[0002] Heat-not-burn tobacco products can heat tobacco leaves just enough to emit smoke without igniting them. Their main advantage is that the smoke contains few harmful components. Existing tobacco pipe structures are generally divided into a smoke-generating section and a acetate section. In order to ensure the quality of smoking, etc., heat-not-burn tobacco products are usually externally flavored. For existing heat-not-burn tobacco products, liquid flavors were previously added directly to thin tobacco slices. After the tobacco slices were heated, the volatile aroma substances would be quickly released, which could easily lead to a significant attenuation of the aroma characteristics at each stage of smoking. In addition, the effective ingredients of the characteristic aroma will slowly dissipate during storage, thus affecting the taste of smoking.

[0003] Some other external flavoring solutions include adding popping beads to the mouthpiece of the cigarette pipe, and controlling the release of aroma through artificial squeezing, in order to continuously enhance the aroma of the smoke. The existing popping bead production process includes: the flavor liquid droplets are added into the wall material glue liquid containing calcium chloride and sodium alginate. The density of the flavor liquid and the wall material glue liquid is different, and the wall material glue liquid forms a glue film around the flavor liquid droplets; the formed popping beads are further filled into the cigarette pipe.

[0004] However, the types of liquid flavors that can be loaded into heat-not-burn tobacco products that use popping beads for flavoring are greatly limited by the structure and performance of the popping beads, which is mainly related to the density of the flavors. It is not possible to load and add a wide spectrum of flavors, and there are great restrictions on the types and forms of flavors. In addition, consumers need to actively apply external force to break the popping beads in order to release the flavor aroma, which is inconvenient to use. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a heat-not-burn tobacco product with a capsule and a preparation process. The novel heat-not-burn tobacco product provided by the present invention can be suitable for various flavors, can slowly release effective characteristic flavor components during the smoking process, ensure the uniformity of each puff, and does not require the user to manually apply external force or other additional operations, which is conducive to application.

[0006] The present invention provides a heat-not-burn tobacco product with capsules, comprising a tobacco pipe, wherein the tobacco pipe body is composed of a smoking substrate segment and a mouthpiece segment with capsules, wherein the mouthpiece segment comprises an acetate fiber segment relatively far from the smoking substrate segment and an empty tube segment accommodating a plurality of capsules;

[0007] Each capsule includes a closed cavity formed by a first flexible film and a second flexible film, and fragrance stored in the cavity; the thickness of the first flexible film and the second flexible film are independently 5-100 microns, the two layers of film have different heat shrinkage rates, and automatically rupture when heated to gradually release the fragrance of the fragrance.

[0008] Preferably, main components of the first flexible film and the second flexible film are respectively selected from one or more of PP, PLA, EVA and PCL.

[0009] Preferably, the thickness of the first flexible film and the second flexible film are independently 10-30 microns.

[0010] Preferably, the shrinkage rate of the first flexible film is 10-20%, and the heat shrinkage rate of the second flexible film is 2-10%.

[0011] Preferably, the capsule is in the shape of a sphere, a cylinder, a block or a streamlined curved body.

[0012] Preferably, the fragrance is in the form of a volatile liquid, gel or paste.

[0013] Preferably, the flavor filling volume accounts for 60-95% of the volume of the capsule cavity, and more preferably 80-90%.

[0014] Preferably, the empty tube section further comprises a plurality of fasteners arranged on the periphery of the capsule to fix the capsule in a circumferentially surrounding or fitting manner.

[0015] Preferably, each fastener is bonded to the inner wall of the empty pipe section by an adhesive, and more preferably, the fastener is made of expandable material.

[0016] The present invention provides a preparation process of the aforementioned heat-not-burn tobacco product, comprising:

[0017] The first flexible film and the second flexible film are combined to form an open capsule, wherein the first flexible film and the second flexible film are combined by one or more of heat-sealing, adhesive bonding and sewing bonding; fragrance is injected therein, and a closed capsule is obtained after heat-pressing and sealing;

[0018] A plurality of the capsules are filled into an empty tube section to form a tobacco tube together with the acetate fiber section and the smoke-generating matrix section, thereby obtaining the heat-not-burn tobacco product.

[0019] The present invention provides a heat-not-burn tobacco product with a capsule, wherein a flexible capsule containing a flavor is placed in an empty tube section of a tobacco pipe close to a smoking section, the suction temperature is sufficient to rupture the capsule and expose the flavor, and the volatile flavor components in the flavor are slowly released during the suction process, and the temperature of this section is between 120-180°C, which will not cause all the flavor substances to volatilize quickly, thus ensuring the uniformity of each puff. The flavors in the novel heat-not-burn tobacco product are of various types and forms, and there is no need for the user to manually apply external force or other additional operations, so the suction is convenient, and the risk of accidental rupture of the capsule during production, preparation, storage and transportation is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A longitudinal perspective schematic diagram of a tobacco product with a capsule according to some embodiments of the present invention;

[0021] Figure 2 is a schematic top view of the maximum projected area of ​​a capsule in some embodiments;

[0022] Figure 3 is a schematic cross-sectional view of a capsule fixed by a fastener in Example 1;

[0023] Figure 4 is a schematic cross-sectional view of a capsule fixed by a fastener in Example 2;

[0024] Figure 5 This is a longitudinal perspective schematic diagram of a capsule fixed by a fastener in Example 3;

[0025] Figure 6 This is a schematic cross-sectional view of a capsule fixed by a fastener in Example 4. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0027] The present invention provides a heat-not-burn tobacco product with capsules, comprising a tobacco pipe, wherein the tobacco pipe body is composed of a smoke-generating substrate segment and a mouthpiece segment with capsules, the mouthpiece segment comprises a acetate fiber segment relatively far away from the smoke-generating substrate segment and an empty tube segment accommodating a plurality of capsules; each of the capsules comprises a closed cavity formed by a first flexible film and a second flexible film, and flavors stored in the cavity; the thickness of the first flexible film and the second flexible film are independently 5-100 microns, the two layers of film have different heat shrinkage rates, and automatically rupture when heated to gradually release the aroma of the flavor.

[0028] The heat-not-burn tobacco product provided by the present invention has the advantages of being easy to use, having a wide range of flavor applicability, and having uniform puff-by-puff suction, and is easy to apply.

[0029] See also Figure 1 , Figure 1 It is a longitudinal perspective schematic diagram of tobacco products with capsules according to some embodiments of the present invention, wherein 1 is a smoking section, 2 is an empty tube section, 3 is an acetate section, 201 is a capsule, and 202 is a fastener.

[0030] The heat-not-burn tobacco product of the embodiment of the present invention comprises a tobacco pipe, the outer surface of which is an elongated tube formed of conventional materials. The tobacco pipe body comprises a smoking section 1, which is a smoking matrix part composed of tobacco leaves and shreds, and the rest is a mouthpiece section with a capsule.

[0031] In the embodiment of the present invention, the mouthpiece section comprises an empty tube section 2 and a acetate fiber section 3 . The empty tube section 2 accommodates a plurality of capsules 201 , and the acetate fiber section 3 is relatively far away from the smoke-generating (matrix) section 1 .

[0032] The capsule 201 of the embodiment of the present invention is arranged in the empty tube section 2, which is close to the smoking section 1; the temperature of the empty tube section 2 when in use is about 120-180°C. At least one capsule 201 contained therein has a flexible film capsule wall, a closed cavity and spices stored therein. Specifically, the closed cavity is formed by combining a first flexible film and a second flexible film. The two layers of film are flexible capsule walls with different heat shrinkage rates. The capsule 201 with the flexible capsule wall automatically ruptures after being heated, thereby gradually releasing the aroma of the spices. The present invention does not require consumers to actively apply external force. The capsule in the empty tube section can slowly release effective characteristic aroma components during the smoking process to ensure the smoking taste.

[0033] In the present invention, the thickness of the first flexible film and the second flexible film is independently 5-100 microns, preferably independently 10-30 microns; and the heat shrinkage rates of the two films are different. As for the materials of the first flexible film and the second flexible film, their main components are each selected from one or more of polypropylene PP (polypropylene, such as biaxially oriented polypropylene BOPP), PLA (polylactic acid, also known as polylactide), EVA (ethylene vinyl acetate copolymer) and PCL (polycaprolactone). PLA is a biodegradable material with an elongation at break of 4-10%; PCL has a melting point of 59-64°C and is a thermoplastic crystalline polyester.

[0034] The capsule described in the embodiment of the present invention can store liquid flavors, gel or paste flavors. There is no special restriction on the form of the flavors, and conventional commercially available flavors can be used. When the cigarette pipe is placed non-vertically, the first flexible film is usually the upper film, that is, relatively far away from the ground or other horizontal plane; the second flexible film is the lower film, and the upper and lower films are combined to form a capsule with a closed cavity. Among them, the capsule composed of the upper and lower films can have any shape, and the capsule shape can be a sphere, a cylinder, a block, a streamlined curved surface. In addition, the two layers of film can be combined by heat bonding, adhesive bonding, sewing bonding, etc.

[0035] In a preferred embodiment of the present invention, the shrinkage rate of the first flexible film (upper film) is 10-20%, and the heat shrinkage rate of the second flexible film (lower film) is 2-10%. When the upper and lower films are heated, a longitudinal tensile force is generated at the bonding point due to the different shrinkage rates. The longitudinal direction refers to the horizontal direction parallel to the bonding surface of the film, and the capsule will preferentially deform and rupture at the point where the bonding force is the smallest. Preferably, the tensile force required for the deformation and rupture of the capsule is between 10-50N, and further preferably, the tensile force required for the deformation and rupture of the capsule is between 20-30N, and the peeling force required for the rupture of the capsule is between 0.5-5N (the tensile machine can be clamped at both ends of the film and stretched at a uniform speed to measure, such as a stretching speed of 30mm / min).

[0036] For any film bonding method, the bonding width is preferably between 0.2-3 mm, and the preferred bonding width is between 0.5-2 mm. In some embodiments of the present invention, the upper and lower films are bonded to form a curved cavity, and the maximum projection area of ​​the cavity is 10-110 mm 2 The maximum projection area of ​​the effective packaging space of the spice is between 5-100mm 2 Between, such as Figure 2 As shown; the height of the cavity is between 1-5 mm, the height refers to the radial direction of the tobacco product and is perpendicular to the maximum projection surface of the cavity.

[0037] In order to ensure that the flavor components in the capsule will not leak during production, storage and transportation, and can be slowly released during the suction process, it is preferred to control the flavor filling volume to 60%-95% of the capsule cavity volume; more preferably, the flavor filling volume accounts for 80%-90% of the capsule cavity volume.

[0038] In some embodiments of the present invention, the empty tube section 2 preferably further includes: a plurality of fasteners 202 disposed on the periphery of the capsule 201, for fixing the capsule 201 in a circumferentially surrounding or fitting manner.

[0039] The fastener 202 of the embodiment of the present invention fixes the capsule 201 in a circumferentially surrounding or fitting manner, and at least one fastener is provided. In addition, the fastener 202 can be bonded to the inner wall of the empty pipe section 2 by an adhesive. Preferably, the fastener 202 is an expandable material, which generally expands by foaming after being heated, and is prepared by a mixture of expandable resins. The expandable resin is a macromolecule, such as one or more of epoxy resin, polymethyl methacrylate, nylon, polyvinyl chloride, polyurethane, acrylonitrile-butadiene-styrene copolymer, polyamide, polylactide, polystyrene, polybutylene, and celluloid.

[0040] The main component of the expandable resin mixture is the above-mentioned high molecular substance, which is recorded as the first component. The mixture also includes a second component - an endothermic foaming agent, preferably a mixture of one or more of bicarbonate, carbonate, polycarboxylic acid and salts thereof; the bicarbonate can be one or more of sodium bicarbonate, potassium bicarbonate and calcium bicarbonate, and the polycarboxylic acid can be one or more of citric acid, tartaric acid, oxalic acid, malic acid, citric acid, benzoic acid, vitamin C, salicylic acid and caffeic acid, and its decomposition products are basically water and carbon dioxide.

[0041] Preferably, the first component polymer accounts for 60-90 wt % of the entire mixed material.

[0042] In a preferred embodiment of the present invention, there may be a gap between the fastener 202 and the capsule 201 or the gap may be filled with an elastomer, and the width of the gap or the thickness of the elastomer is between 0.5-2 mm. The elastomer may be one or a combination of polyolefin elastomer, vulcanized rubber, polystyrene elastomer, polyurethane elastomer, polyamide elastomer, and the elastomer has a Shore A hardness of 30 to 80A.

[0043] The fastener 202 made of expandable material has an expansion start temperature greater than 60°C, preferably between 80-150°C, so that the expansion start temperature of the fastener 202 is adapted to the temperature of the tail of the smoking section 1 when smoking tobacco products. The fastener 202 produces radial volume expansion when reaching the expansion start temperature, and directly or through the elastomer transmits the expansion pressure to the outer wall of the capsule 201, extruding the contents to produce a peeling force on the upper and lower films of the capsule, and the peeling force transmitted to the film is preferably not less than 10N, and the capsule ruptures to release the flavor components. In addition, the fastener 202 and the capsule 201 are placed in the empty tube section 2 of the tobacco product, and the empty tube section 2 is located after the smoking section 1; the empty tube section 2 can be composed of 2 layers or more of forming paper, and the compressive strength is not less than 0.5MPa, so that the tobacco product will not be deformed due to the expansion of the fastener, and the stress concentration acts on the capsule, causing the capsule to rupture.

[0044] The present invention also provides a process for preparing the aforementioned heat-not-burn tobacco product, comprising:

[0045] The first flexible film and the second flexible film are combined to form an open capsule, wherein the first flexible film and the second flexible film are combined by one or more of heat-sealing, adhesive bonding and sewing bonding; fragrance is injected therein, and a closed capsule is obtained after heat-pressing and sealing;

[0046] A plurality of the capsules are filled into an empty tube section to form a tobacco tube together with the acetate fiber section and the smoke-generating matrix section, thereby obtaining the heat-not-burn tobacco product.

[0047] In the embodiment of the present invention, a self-made capsule can be used, and the upper and lower templates of the mold are hot-pressed. The temperature of the upper and lower templates can be between 80-140°C, and the hot-pressing time is 1-5s, so that the first flexible film and the second flexible film are first prepared into an open capsule, and then any type and form of spices are injected, and the capsule is sealed. The flexible film, spices, etc. are as described above and will not be repeated here.

[0048] In the embodiment of the present invention, a plurality of the capsules are filled into an empty tube section to form a tobacco tube together with the acetate fiber section and the smoke-generating matrix section, thereby obtaining the heat-not-burn tobacco product.

[0049] The acetate segment and the smoke segment are conventional components of cigarettes in the art. For example, the acetate segment is 5-15 mm long and the smoke segment is 10-18 mm long. The heat-not-burn tobacco product of the present invention is tested on cigarettes. No additional operation is required during smoking. The flavor characteristics can be felt after 2-3 puffs, and each puff is uniform.

[0050] The present invention is not limited by the following embodiments, and the specific implementation method can be determined according to the technical solution of the present invention and the actual situation. The present invention is further described below in conjunction with specific embodiments.

[0051] In the following examples, all raw materials are commercially available products. Self-made capsules: The first flexible film and the second flexible film are used, and the upper and lower templates of the mold are hot-pressed, and the temperature of the upper and lower templates is between 80-140°C, and the hot-pressing time is 1-5s, and an open capsule is formed; spices are injected into it, and a closed capsule is obtained after hot-pressing and sealing.

[0052] Embodiment 1:

[0053] The prepared capsule is filled into the empty tube section, and together with the acetate fiber section and the smoke section, a smoke tube is formed to obtain the heat-not-burn tobacco product. The empty tube section is 25 mm long, the acetate fiber section is 8 mm long, and the smoke section is 15 mm long. The upper and lower films of the capsule are specifically composed of PLA, and the film thickness is 20 microns. The heat shrinkage rate of the upper film is 10-20%, and the heat shrinkage rate of the lower film is 6%-10%.

[0054] The bonding width of the upper and lower films is 0.5mm. The upper and lower films are bonded to form a curved cavity. The maximum projection area of ​​the cavity is 10-110mm. 2 The maximum projection area of ​​the effective packaging space of the spice is between 5-100mm 2 The capsule cavity dimensions include: cavity height 3mm, length 12mm, width 5mm. The amount of flavor is between 0.05-1ml, and the flavor material can be menthol, sweet orange, blueberry, lemon, taro, pineapple, grape essential oil, etc., accounting for 90% of the volume of the capsule. In the following embodiments, the sizes of the cigarette segments, capsule materials, flavors, etc. are consistent.

[0055] like Figure 3 As shown, in this embodiment, a fastener is provided on the periphery of the capsule, and the fastener fixes the capsule in a fitting manner. Two upper and lower fasteners are provided, and the fasteners are fixed to the inner wall of the empty tube section by adhesive bonding.

[0056] The fastener is an expandable material, made of a mixture of a first component of polymethyl methacrylate and a second component; the first component accounts for 80wt% of the mixture, and the second component is sodium bicarbonate and salicylic acid, and the mass ratio of sodium bicarbonate and salicylic acid is 1:1 (other ratios can also be selected between 1:1 and 1:10). There is a gap between the fastener and the capsule, and the thickness of the gap is between 0.5-2mm. The expansion start temperature of the expandable material fastener is between 80-150℃, which is suitable for the temperature of the tail of the smoking section when smoking tobacco products.

[0057] When the fastener reaches the expansion starting temperature, it produces radial volume expansion, directly transmitting the expansion pressure to the outer wall of the capsule, squeezing the contents to produce a peeling force of no less than 10N on the upper and lower films of the capsule, and the capsule ruptures to release the aroma components.

[0058] The heat-not-burn tobacco product of the present invention is tested on cigarettes. No additional operation is required when smoking. The flavor characteristics can be felt after 2-3 puffs, and each puff is uniform.

[0059] The existing cigarettes generally have their flavor characteristics decay after 5-6 puffs. The scheme of this embodiment can ensure that the flavor characteristics of each puff are consistent and do not decay.

[0060] Embodiment 2:

[0061] The prepared capsule is filled into an empty tube section to form a tobacco tube together with the acetate fiber section and the smoke-generating section to obtain the heat-not-burn tobacco product.

[0062] like Figure 4 As shown, a fastener is provided on the periphery of the capsule, and the fastener fixes the capsule in a circumferentially surrounding manner, and is arranged as an annular member, and the fastener is fixed to the inner wall of the empty tube section by adhesive bonding.

[0063] The fastener is made of expandable material, which is consistent with Example 1. The space between the fastener and the capsule is filled with an elastomer, the thickness of the elastomer is between 0.5-2 mm, and the gap with the capsule is matched, and the elastomer is a polyolefin elastomer with a Shore A hardness of 30 to 80A. The expansion start temperature of the expandable material fastener is between 80-150°C, which is adapted to the temperature of the tail of the smoking section when smoking tobacco products.

[0064] When the fastener reaches the expansion starting temperature, it produces radial volume expansion, and transmits the expansion pressure to the outer wall of the capsule through the elastomer, squeezing the contents to generate a peeling force on the upper and lower films of the capsule. The peeling force transmitted to the film is not less than 10N, and the capsule ruptures to release the aroma components.

[0065] The heat-not-burn tobacco product of the present invention is tested on cigarettes. No additional operation is required when smoking. The flavor characteristics can be felt after 2-3 puffs, and each puff is uniform.

[0066] Embodiment 3:

[0067] The prepared capsule is filled into an empty tube section to form a tobacco tube together with the acetate fiber section and the smoke-generating section to obtain the heat-not-burn tobacco product.

[0068] like Figure 5 As shown, a fastener is provided on the periphery of the capsule, and the fastener fixes the capsule in a fitting manner. Two upper and lower fasteners are provided, and the fasteners are fixed to the inner wall of the empty tube by adhesive bonding.

[0069] The fastener is made of expandable material, which is consistent with Example 1. The fastener is provided with a synaptic point, which is an elastomer, and the synaptic point is located above the outer wall at the largest part of the capsule cross section. The thickness of the elastomer is between 0.5-2 mm, and the elastomer is a polyolefin elastomer with a Shore A hardness of 30 to 80A. The expansion start temperature of the expandable material fastener is between 80-150°C, which is adapted to the temperature of the tail of the smoking section when smoking tobacco products.

[0070] When the fastener reaches the expansion starting temperature, it produces radial volume expansion, and transmits the expansion pressure to the outer wall of the capsule through the elastomer, squeezing the contents to generate a peeling force on the upper and lower films of the capsule. The peeling force transmitted to the film is not less than 10N, and the capsule ruptures to release the aroma components.

[0071] The heat-not-burn tobacco product of the present invention is tested on cigarettes. No additional operation is required when smoking. The flavor characteristics can be felt after 2-3 puffs, and each puff is uniform.

[0072] Embodiment 4:

[0073] The prepared capsule is filled into an empty tube section to form a tobacco tube together with the acetate fiber section and the smoke-generating section to obtain the heat-not-burn tobacco product.

[0074] like Figure 6 As shown, a fastener is provided on the periphery of the capsule, and the fastener fixes the capsule in a fitting manner. A cylindrical fastener is provided, and the fastener is fixed to the inner wall of the empty tube by adhesive bonding.

[0075] The fastener is made of expandable material, which is consistent with Example 1. The maximum gap between the fastener and the empty pipe section is 2-5 mm. The empty pipe section is provided with three capsules, which are adhered to the inner wall of the empty pipe by adhesive. The expansion start temperature of the expandable material fastener is between 80-150°C, which is suitable for the temperature of the tail of the smoking section when smoking tobacco products.

[0076] When the fastener reaches the expansion starting temperature, it produces radial volume expansion, directly transmitting the expansion pressure to the outer wall of the capsule, squeezing the contents to generate a peeling force on the upper and lower films of the capsule. The peeling force transmitted to the film is not less than 10N, and the capsule ruptures to release the aroma components.

[0077] The heat-not-burn tobacco product of the present invention is tested on cigarettes. No additional operation is required when smoking. The flavor characteristics can be felt after 2-3 puffs, and each puff is uniform.

[0078] In Examples 1-4, the shapes and placement of the capsules are different, but the effects are basically the same.

[0079] As can be seen from the above embodiments, in the heat-not-burn tobacco product of the present invention, the flexible capsule containing the flavor is placed in the empty tube section of the smoke tube near the smoking section, and the suction temperature is sufficient to rupture the capsule and expose the flavor. The volatile flavor components in the flavor are slowly released during the suction process, and all the flavor substances will not volatilize quickly, thereby ensuring the uniformity of each puff. The flavors in the new heat-not-burn tobacco product are of various types and forms, and do not require the user to manually apply external force or other additional operations, while reducing the risk of accidental rupture of the capsule during production, preparation, storage and transportation, which is conducive to application.

[0080] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A heat-not-burn tobacco product with capsules, comprising a tobacco pipe, characterized in that, the main body of the tobacco pipe consists of a smoke-generating matrix section and a mouthpiece section with capsules, and the mouthpiece section includes a cellulose acetate section relatively far from the smoke-generating matrix section and a hollow tube section for accommodating a number of capsules; each of the capsules includes a closed cavity formed by combining a first flexible film and a second flexible film, and a flavor stored in the cavity; the thickness of the first flexible film and the second flexible film is independently 5 - 100 microns, the two films have different thermal shrinkage rates, and are automatically broken by heat to gradually release the aroma of the flavor; the filling volume of the flavor accounts for 60 - 95% of the volume of the capsule cavity; the shrinkage rate of the first flexible film is 10 - 20%, and the thermal shrinkage rate of the second flexible film is 2 - 10%.

2. The heat-not-burn tobacco product according to claim 1, characterized in that, the main components of the first flexible film and the second flexible film are each selected from one or more of PP, PLA, EVA, and PCL.

3. The heat-not-burn tobacco product according to claim 2, characterized in that, the thickness of the first flexible film and the second flexible film is independently 10 - 30 microns.

4. The heat-not-burn tobacco product according to claim 1, characterized in that, the shape of the capsule is a streamline curved surface body.

5. The heat-not-burn tobacco product according to claim 4, characterized in that, the shape of the capsule is a sphere or a cylinder.

6. The heat-not-burn tobacco product according to claim 1, characterized in that, the property of the flavor is volatile liquid, gel or paste.

7. The heat-not-burn tobacco product according to claim 6, characterized in that, the filling volume of the flavor accounts for 80 - 90% of the volume of the capsule cavity.

8. The heat-not-burn tobacco product according to any one of claims 1 - 7, characterized in that, the hollow tube section further includes a number of fasteners arranged around the periphery of the capsule to fix the capsule in a circumferentially surrounding or fitting manner.

9. The heat-not-burn tobacco product according to claim 8, characterized in that, each fastener is adhesively bonded to the inner wall of the hollow tube section, and the fastener is an expandable material.

10. A preparation process of the heat-not-burn tobacco product according to any one of claims 1 - 9, comprising: combining the first flexible film and the second flexible film to form an open capsule-like object, injecting flavor into it, and obtaining a closed capsule after hot-pressing and sealing; filling a number of the capsules into the hollow tube section, and forming a tobacco pipe together with the cellulose acetate section and the smoke-generating matrix section to obtain the heat-not-burn tobacco product.

11. The preparation process according to claim 10, characterized in that, the combination method of the first flexible film and the second flexible film is one or more of heat-sealing adhesion, adhesive adhesion, and sewing adhesion.

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