A plugging device and a plugging process

Abstract

The present invention discloses a sealing device and a sealing process. The sealing device includes a cigarette tube shell, food-grade glue and a sealing layer. The cigarette tube shell is a multi-layer composite structure. The sealing layer is made of fiber raw materials and auxiliary materials, and the fiber raw materials can be plant fibers. The sealing process of the sealing device includes a finishing process, a gluing process, a sealing process, a curing process and a trimming process. The present invention can improve the effective utilization of space in the cigarette tube, improve the air permeability, reliability and suction effect of the sealing of granular tobacco products, and enhance the simplicity of the manufacturing process, the economy of the manufacturing cost, and the environmental friendliness.

Description

Technical Field

[0001] The invention relates to the technical field of low-temperature non-combustion granular cigarettes, and in particular to a blocking device and a blocking process. Background Art

[0002] In recent years, with the significant improvement of consumers' health and environmental awareness and the gradual deepening of scientific and technological research and development, the new tobacco industry has rapidly emerged. The so-called "new tobacco" refers to tobacco regeneration obtained by reprocessing tobacco plants, such as tobacco flakes prepared by papermaking, tobacco granules prepared by granulation, etc. Because of its own special physical and chemical properties, the use methods and applicable conditions of different tobacco regenerations may be different.

[0003] As we all know, the smoking of traditional cigarettes uses an open flame to burn tobacco at a high temperature of more than 700°C. Compared with the burning and smoking of traditional cigarettes, the use of electric heating to heat the tobacco regeneration below 400°C is called "low-temperature non-burning cigarettes" because of its low heating temperature and no open flame combustion. The contents of low-temperature non-burning cigarettes mainly use new tobacco. Among them, the attempt to use tobacco particles has been verified to be feasible. Low-temperature non-burning cigarette products with tobacco particles as the main content are continuously developed and improved, and continue to be widely recognized by the market.

[0004] However, due to their special particle shape, tobacco particles are in a loose and disordered state. Therefore, in the process of preparing low-temperature non-burning cigarette products, in order to make the tobacco particles in the cigarette in an ideal state and keep the aroma substances of the tobacco particles from volatilizing, it is often necessary to use a sealing device to encapsulate the tobacco particles.

[0005] At present, the most common blocking device is the cigarette bomb blocking, that is, the cigarette bomb or tobacco particle segment is formed by blocking the tobacco particles. For example, see the application number 201811487278.0, the invention name is "A tobacco particle type heat-not-burn tobacco product and its production method". In this patent application, the base rod, the composite mouth rod and the empty tube cigarette are first prepared, and then the tobacco particles are filled, wherein the front end blocking structure and the rear end blocking structure are filled with tobacco particles, the material used for the front end blocking structure is aluminum foil lining paper, and the material used for the rear end blocking structure is aluminum foil. In this patent, the paper empty tube is part of the packaging shell, and does not directly package tobacco particles, the second cooling section and the fiber filter rod. On the basis of the paper empty tube, which is already a multi-layer structure, an additional multi-layer packaging material is added, which increases the wall thickness of the cigarette, which not only affects the heat dissipation and cooling effect of the non-burning tobacco product, but also reduces the effective utilization space of tobacco particles due to the volume size of the non-burning tobacco product itself, thereby affecting the final use effect of the product. In addition, in order to block the tobacco particles, the patent adopts a two-stage blocking structure, so the production process is complicated, the production efficiency is low and the production cost is high.

[0006] Since low-temperature non-burning cigarettes need to be used with heated smoking utensils, and most of the existing smoking utensils are plug-in electric heating smoking utensils, the end face sealing devices of the cigarettes all adopt an easily punctured structure. In the sealing technology of granular tobacco products, the heat sealing technology of coating materials is currently widely used. For the heat sealing technology of coating materials, in order to improve the air permeability of the coating materials, special processing technology must be adopted. For example, the patent with application number 201811488351.6 discloses a non-rolled new tobacco product containing tobacco granular materials, which uses a breathable sheet material to seal the tail end of a paper empty tube. The breathable sheet material is made by bonding a graphene film to ultra-fine glass fiber cotton. It can be seen from the content disclosed in the patent document that in order to improve its air permeability, the breathable sheet material is made of special materials and processed by special processes. Therefore, it leads to complex manufacturing methods, long production cycles, high difficulty, and high cost of the resulting products.

[0007] In addition, the patent with application number CN201811484718.7 discloses the preparation method and application of empty tube filled heat-not-burn smoking products with sealing film. Among them, the circular empty tube is made of materials with sufficient hardness to wrap the filler and support it without deformation, such as paper tubes, aluminum foil tubes, aluminum foil paper tubes, ceramic tubes, etc.; and the sealing film is made of materials that are easily punctured by heating sheets or needles, such as perforated aluminum foil, high air permeability paper, coated paper or high temperature resistant plastic film. For circular empty tubes, a one-step rolling method of forming paper sheets can be used, or a spiral production method of multi-layer paper sheets can be used. In this patent, the circular empty tube is made of a single material and a simple structure. The patent discloses that the sealing film can be made of perforated aluminum foil, high air permeability paper, coated paper or high temperature resistant plastic film. It can be seen that it is obvious that the patent is only concerned with the air permeability of the sealing film. After careful research, the inventors found that due to the particularity of the application of packaging film for tobacco regenerated products, taking high-permeability paper as an example, its impact on the packaging of tobacco regenerated products is not only the parameter index of air permeability, but also includes many parameter indexes such as paper material, strength, thickness, layer density, and regain. As far as high-permeability paper is concerned, the differences in these parameter indexes often determine that it has different physical properties, which in turn will have a great impact on its actual application effect.

[0008] In view of the above problems, the inventors of the present application have found through a large number of experimental studies that: on the one hand, the cigarette tube shell structure currently used in the plugging technology of granular tobacco products will cause the cigarette tube shell wall to be too thick, thereby affecting the heat dissipation and cooling effect of non-combustion tobacco products, and will also reduce the effective utilization space of tobacco particles, and the excessively thick cigarette tube shell wall will lead to material waste; on the other hand, the problem with the heat sealing technology of the coating material currently widely used in the plugging technology of granular tobacco products is that the technicians only pay attention to the air permeability of the sealing coating, and the sealing property of the coating material itself will cause the heat sealing temperature to be too high, so that the tobacco particles will produce smoke, deterioration and other problems, which affects the use effect of the granular tobacco products, and will also cause a series of problems such as high manufacturing cost, complex manufacturing process, and greater environmental pollution; in addition, the coating material currently widely used in the plugging technology of granular tobacco products is made of synthetic fiber, and the bonding glue is non-edible glue. During the user's inhalation process, these materials will produce unpleasant chemical odors when heated, which seriously affects the user's inhalation feeling and even physical health.

[0009] In view of this, the inventors of the present application started with the technical improvement of the cigarette branch tube shell structure and the sealing layer of the cigarette branch tube, and conducted a large number of experimental studies in order to improve the sealing technology of granular tobacco products from multiple aspects such as improving the effective utilization of space in the cigarette branch tube, improving the air permeability, reliability, simplicity of manufacturing process, economical manufacturing cost, and environmental friendliness of the sealing of granular tobacco products, thereby improving the use effect of granular tobacco products. Summary of the invention

[0010] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide a sealing device and a sealing process for cigarette products, so as to improve the problems existing in the sealing packaging technology of cigarette products in the prior art, improve the effective utilization of space in the cigarette tube, improve the air permeability, reliability and suction effect of the sealing of granular tobacco products, and enhance the simplicity of the manufacturing process, the economy of manufacturing cost, and environmental friendliness.

[0011] According to one aspect of the present invention, a plugging device is provided, which includes a cigarette holder shell, food-grade glue and a plugging layer, wherein the plugging layer is made of fiber raw materials and auxiliary materials. Since the manufacturing of the plugging layer in the present invention is to achieve fast and high-quality film formation and better shaping of the plugging layer through the organic combination of fiber raw materials and auxiliary materials, the defects caused by the use of film-coated materials in the plugging layer in the prior art are eliminated.

[0012] Preferably, the cigarette tube shell adopts a multi-layer composite structure including an inner layer, an intermediate layer and an outer layer, wherein the inner layer is oil-proof and waterproof paper, the intermediate layer is a support paper with a porous structure or a coarse fiber sheet of plants such as cotton and linen, and the outer layer is a plasticized paper or a high-temperature resistant polyester fiber film. More preferably, the multi-layer composite structure of the cigarette tube shell also includes an innermost layer located on the inner side of the inner layer, and the innermost layer is aluminum-coated paper or aluminum foil paper. In addition, as another more preferred scheme, an aluminum film can also be sprayed on the inner side of the oil-proof and waterproof paper constituting the inner layer. In addition, the outer diameter of the cigarette tube shell is 7.0-8.8mm, and the wall thickness is 0.1-0.3mm. Preferably, a spiral paper tube machine is used to continuously roll multiple layers of paper simultaneously. Generally speaking, paper tube rolling is a single-piece straight-rolling method, where a single piece of paper is directly rolled into a paper tube according to a straight axis. Due to the special shape of the paper material and the rolling method, only step-by-step production can be achieved, and the production efficiency is low. In addition, since the paper seam is a straight line, the paper tube is the strongest and has the highest mechanical strength at the straight paper seam, but the mechanical strength is low at other positions of the paper tube and it is easy to deform under pressure. In comparison, the spiral paper tube machine can roll multiple papers at the same time according to the spiral axis, thereby achieving continuous production and greatly improving production efficiency. In addition, since the rolled paper seam is a spiral line, it is evenly distributed at various positions on the paper tube wall, and the mechanical strength at various positions of the paper tube is significantly improved, thereby greatly improving the overall mechanical strength and wear resistance of the cigarette tube shell.

[0013] By adopting the above-mentioned specific multi-layer composite structure for the cigarette tube shell, the present invention has the following significant advantages: ① The inner layer adopts oil-proof and waterproof paper, which takes advantage of its high density and poor air permeability to effectively prevent the seepage of components in the particles and the dispersion of smoke during inhalation, thereby effectively gathering smoke and improving the use effect; ② The support paper used in the middle layer is made of low-density fibers with a porous structure, or made of coarse fiber sheets of plants such as cotton and linen, so that while playing a supporting role for the cigarette tube shell, it can also play an effective insulation role and prevent overheating when taking the cigarette after inhalation or after inhalation; ③ The outer layer adopts plasticized paper or high-temperature resistant polyester fiber film, which takes advantage of its plastic material and high hardness. While playing a supporting role, it can effectively protect the cigarette from being easily bent and damaged, and fully improve the mechanical strength of the cigarette tube shell to ensure that it is conducive to the gluing operation. And the cutting cross section can be guaranteed to be flat during cutting; ④ It is particularly pointed out that since the cigarette tube shell of the present application uses aluminum paper or aluminum foil in the innermost layer, or the inner side of the oil-proof and waterproof paper constituting the inner layer is sprayed with aluminum film, the internal and external environment of the cigarette is further isolated, and the unique properties of the aluminum material can be used to reduce the heat dissipation from the cigarette tube shell to the outside, further improving the heating effect; ⑤ The above structure can effectively reduce the wall thickness of the cigarette while meeting various effects. In summary, due to the use of the above-mentioned specific multi-layer composite structure, compared with the cigarette tube shell made of a single material and a single structure in the prior art, the cigarette tube shell of the present invention significantly enhances functionality and application effects.

[0014] Preferably, food-grade glue is applied to the edge of the end of the cigarette holder shell, and the food-grade glue is food-grade silicone, food-grade fiber glue, food-grade resin glue, natural latex, modified starch glue, vegetable glue or similar materials.

[0015] Since food grade glue is used to complete the gluing and bonding of the sealing layer, the present invention has the following significant advantages: ① Food grade glue has good adhesion to ensure the long-term stability of the structure; ② Food grade glue has good medium resistance and plays a sealing role to prevent the leakage of particles and the volatilization of effective substances; ③ Food grade glue has good heat resistance and can withstand high temperatures of 180-200°C, protecting the cigarette components under normal conditions; ④ Food grade glue will not produce unpleasant odors under low temperature and high temperature conditions, and does not have the chemical smell of synthetic glue; ⑤ The gluing process does not require heating, and the tobacco particles, cigarette tube shell or sealing layer will not be damaged during the gluing process; ⑥ The corresponding curing process required for the gluing process only requires an instantaneous heating of 120-160°C, which will not damage the tobacco particles, cigarette tube shell or fiber layer.

[0016] Preferably, the fiber raw material for making the plugging layer is plant fiber, and the plant fiber is preferably one or more of tobacco pulp, wood pulp, bamboo pulp, straw pulp, hemp pulp, cotton pulp or similar viscous pulp. More preferably, the single fiber linear density of the plant fiber is 0.2-3.2dtex, the moisture regain of the hygroscopicity is within 15%, and the fiber breaking strength is not less than 3cN / dtex. In addition, it is more preferred that the thickness of the plugging layer is 0.01mm-0.03mm, and the layer density is 20-40g / m 2 The air permeability is higher than 2000CU. In addition, the sealing layer does not produce odor in an environment of 400℃.

[0017] As another key point and important aspect of the present invention, the blocking layer adopts plant fiber, and then the inventor further selects the relevant parameters of the plant fiber (such as the above-mentioned single fiber linear density, hygroscopic regain, fiber breaking strength, etc.) and the relevant parameter indicators of the blocking layer (such as thickness, layer density, air permeability, etc.). Therefore, the present invention has the following advantages: The inventor found through a large number of experimental studies that for the blocking layer of the blocking device, the actual effect of the blocking layer should not only focus on its air permeability, but should be comprehensively considered and designed from multiple aspects such as air permeability, flexibility, appropriate strength, changes in physical and chemical properties after heating, so as to obtain technical effects that are significantly better than the current existing technology. Specifically, the present invention manufactures a sealing layer by specially utilizing plant fibers and auxiliary materials to synthesize the sealing layer, aiming to utilize the unique characteristics of plant fibers such as long fibers, tight fibers, and good toughness, and to combine with auxiliary materials. The sealing layer thus manufactured can significantly improve its air permeability while ensuring its lightness and thinness, so as to ensure that the sealing layer thus manufactured can both ensure the passage of gas and isolate the moisture loss of the encapsulated tobacco particles, thereby effectively maintaining the quality of the cigarette products and preventing the reduction of the aroma and taste of the tobacco particles during processing, transportation, and storage; and, it can also significantly improve the flexibility of the sealing layer and optimize the mechanical strength of the sealing layer, so as to ensure that the sealing layer thus manufactured is not easily damaged during processing and transportation, and to ensure that the sealing layer thus manufactured is easily punctured by the heating element, and in the manufacturing process of the sealing device, it is easy to achieve precise size cutting. For example, the inventors have discovered through extensive research that, for the plant fibers used to make the sealing layer, the single fiber linear density and fiber breaking strength not only determine the overall firmness, stability and storage time of the sealing layer, but also determine whether it is easy to cut and other aspects of its processability; the thickness, layer density, air permeability, and the presence or absence of odor at high temperatures of the sealing layer are related to the suction effect. For example, the layer density of the sealing layer should not be too low. Too low a layer density will affect the long-term stability of the structure and tobacco regeneration components, and may easily cause leakage of aqueous and oily components.

[0018] Preferably, the auxiliary material is a high-viscosity fiber slurry, plant glue, animal glue or food-grade plasticizer, thickener, wherein the plant glue can be pectin, natural resin or similar materials, and the animal glue can be shellac or similar materials. More preferably, the ratio of plant fiber to auxiliary material is not less than 3:1. Here, it should be noted that "high-viscosity fiber slurry" refers to an aqueous solution with fiber as the main component, whose viscosity is usually not less than 20Cps and the water content is within 20%.

[0019] The inventors have found through careful research that when the ratio is lower than 3:1, it is difficult to form the blocking layer during manufacturing, and the thickness and density of the blocking layer will be uneven.

[0020] According to another aspect of the present invention, a plugging process using the above-mentioned plugging device is also provided, the process comprising a finishing process, a gluing process, a plugging process, a curing process and a trimming process. Preferably, the inner layer, the middle layer, the outer layer and the innermost layer of the cigarette tube shell are rolled by a spiral paper tube machine at the same time to form a multi-layer composite structure. In addition, preferably, the curing temperature of the curing process is 120-160°C, so as to control the plugging layer to be firmly attached without displacement or wrinkling.

[0021] The blocking process of the present invention is implemented in the production and assembly process of cigarettes, either before or after the filling process.

[0022] In summary, the present invention breaks through the current understanding of the blocking technology by technicians in the technical field of low-temperature non-combustion granular cigarettes, and comprehensively considers and improves the air permeability, flexibility, appropriate strength, changes in physical and chemical properties after heating, and other aspects of the blocking device. The blocking device and blocking process provided by the present invention can significantly improve the effective utilization space of the cigarette tube, improve the air permeability, reliability and suction effect of the blocking of granular tobacco products, and enhance the simplicity of the manufacturing process, the economy of manufacturing costs, and environmental friendliness. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the blocking device of the present invention.

[0024] Figure 2 It is a schematic diagram of the structure of the cigarette holder shell.

[0025] Among them: 101-sealing layer; 102-food grade glue; 103-cigarette tube shell; 2-tobacco particles; 3-filter component; 4-mouthpiece. DETAILED DESCRIPTION

[0026] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[0027] <Example 1>

[0028] like Figure 1-2 As shown, the blocking device is composed of a cigarette tube shell 103, food-grade glue 102 and a blocking layer 101. The blocking layer 101 is adhered to one end of the cigarette tube shell 103 by the food-grade glue 103. Tobacco particles 2, a filter component 3 and a mouthpiece 4 are arranged in sequence inside the cigarette tube shell 103. In this embodiment, the food-grade glue 102 is made of natural latex.

[0029] The cigarette holder shell 103 is a multi-layer composite structure, which includes an inner layer 103a, an intermediate layer 103b, and an outer layer 103c. In this embodiment, the inner layer 103a is made of oil-proof and waterproof paper sprayed with aluminum film, the intermediate layer 103b is made of cotton sheet, and the outer layer 103c is made of plasticized paper. The outer diameter of the cigarette holder shell 103 thus formed is 8.5mm and the wall thickness is 0.2mm.

[0030] The blocking layer 101 is a mixed cotton fiber layer made of cotton pulp as a fiber raw material and wormwood pulp as an auxiliary material, and the mass ratio of the cotton pulp to the wormwood pulp is 7:1.

[0031] It is particularly important to note that the present invention takes into account the air permeability, flexibility, suitable strength, physical and chemical properties after heating, etc. required for the specific use of the blocking layer 101. In this embodiment, the single fiber linear density of the mixed cotton fiber layer is 2.1 dtex, the moisture regain is 7%, and the fiber breaking strength is 5.9 cN / dtex; in addition, the thickness of the blocking layer 101 is 0.02 mm, and the layer density is 22 g / m 2 , the air permeability is 26000CU. Cotton fibers that meet this requirement can remain dry for a long time, and the fiber slurry is easy to form a film and set. The sealing layer 101 prepared according to the requirements of this embodiment has high flexibility, is not easy to deform when pulled, is not easy to fuzz at the edges when cut, has high air permeability, and the suction feels natural and unobstructed. In addition. The auxiliary material is made of wormwood pulp, which utilizes the unique antioxidant, bactericidal and insect-proof properties of wormwood, and is beneficial to human health. While ensuring the air permeability, flexibility, strength and other characteristics of the sealing layer 101, it specifically improves the effective maintenance and preservation of the quality of the cigarette products.

[0032] The operation of plugging using the plugging device of this embodiment is as follows: the plugging process is performed before the filling process of tobacco particles. First, the inner layer 103a, the middle layer 103b, and the outer layer 103c sprayed with aluminum film of the cigarette tube shell are rolled simultaneously by a spiral paper tube machine to form a cigarette tube shell 103 with a multi-layer composite structure, and the prepared cigarette tube shell 103 is erected with its downwardly opened end as the bottom end; then, the cigarette tube shell 103 is passed through a glue coating machine so that latex is coated on the bottom edge of the cigarette tube shell 103: then, the bottom end of the cigarette tube shell 103 is pressed on the plugging layer 101, and it is passed through a curing machine with a temperature controlled at 160°C to solidify the latex, thereby achieving reliable bonding between the cigarette tube shell 103 and the plugging layer 101; finally, a trimming process is implemented, that is, the excess plugging layer 101 bonded to the bottom end of the cigarette tube shell 103 is cut to finally form a finished plugging device. Then, tobacco particles are filled, and the filter component and the mouthpiece are filled in sequence. In this embodiment, the blocking layer 101 is used as the bottom end surface, and after the tobacco particles are filled, the filter component 3 and the mouthpiece 4 are compacted, thereby increasing the filling volume and improving the space utilization rate.

[0033] <Example 2>

[0034] The blocking device of this embodiment is different from that of Embodiment 1 in that the overall outer diameter of the cigarette holder shell 103 is 7.0 mm and the wall thickness is 0.3 mm. The food-grade glue 102 is modified starch glue.

[0035] The plugging layer 101 is a plugging layer made of bamboo pulp and auxiliary liquid, wherein the mass ratio of bamboo pulp to auxiliary liquid is 10:1, and the auxiliary liquid can be a mixed liquid made of natural resin and pectin at a mass ratio of 5:3. In the embodiment, the purpose of using bamboo pulp as plant fiber is to make full use of a series of characteristics of bamboo pulp fiber, such as high cellulose content, good fiber morphology, low ash content, and especially outstanding thermal stability, and organically combine with natural resin and pectin, so that the plugging layer 101 manufactured by this process is further improved in flexibility, strength, physical and chemical properties after heating, and processability while ensuring air permeability.

[0036] The operation of blocking using the blocking device of this embodiment is as follows: the blocking process is performed after the filling process of tobacco particles. First, the inner layer 103a, the middle layer 103b and the outer layer 103c of the cigarette tube shell are rolled simultaneously by a spiral paper tube machine to form a cigarette tube shell 103 with a multi-layer composite structure, the cigarette tube shell 103 is erected, and a mouthpiece and a filter component are filled into the tube shell, so that the bottom end is blocked, and tobacco particles are filled inwardly, and the open end is facing upward; then, the cigarette tube shell 103 is passed through a glue coating machine, and modified starch glue is applied to the bottom port serving as the open end: then, the sealing layer 101 is pressed against the above-mentioned bottom end edge of the cigarette tube shell 103, and passed through a curing machine with a temperature controlled at 160°C to cure the modified starch glue, thereby achieving reliable bonding between the cigarette tube shell 103 and the sealing layer 101; finally, a trimming process is implemented, that is, the excess sealing layer 101 bonded to the bottom end of the cigarette tube shell 103 is cut to complete the final manufacturing. In this embodiment, since the blocking process is performed after the filling process of the tobacco particles, compared with the embodiment 1, the embodiment 2 reduces the adhesion of the blocking layer 101 to the packaged tobacco particles.

[0037] The above contents are only the best embodiments of the present invention. It should be emphasized that various modifications and improvements made to the present invention by ordinary technicians in this field without departing from the concept of the present invention should fall within the protection scope of the present invention.

Claims

1. A blocking device, characterized in that: The blocking device comprises a cigarette holder shell (103), food-grade glue (102) and a blocking layer (101), wherein the blocking layer (101) is made of fiber raw materials and auxiliary materials, wherein the fiber raw materials are plant fibers, and the auxiliary materials are high-viscosity fiber slurry, plant glue, animal glue, food-grade plasticizer or thickener, and the ratio of the plant fibers to the auxiliary materials is not less than 3:1; the cigarette holder shell (103) adopts a multi-layer composite structure including an inner layer (103a), an intermediate layer (103b) and an outer layer (103c), wherein the inner layer (103a) is oil-proof and waterproof paper, the intermediate layer (103b) is support paper with a porous structure or a plant coarse fiber sheet, and the outer layer (103c) is plasticized paper or a high-temperature resistant polyester fiber film, and the high-viscosity fiber slurry refers to an aqueous solution with fibers as the main component, and its viscosity is not less than 20Cps and its water content is within 20%.

2. The blocking device according to claim 1, characterized in that: The plant crude fiber pieces are cotton or hemp plant crude fiber pieces.

3. The blocking device according to claim 1 or 2, characterized in that: The multi-layer composite structure of the cigarette holder shell also includes an innermost layer located inside the inner layer.

4. The blocking device according to claim 3, characterized in that: The innermost layer is aluminum-coated paper or aluminum foil paper.

5. The blocking device according to claim 1, characterized in that: An aluminum film is sprayed on the inner side of the oil-proof and waterproof paper constituting the inner layer (103a).

6. The blocking device according to claim 3, characterized in that: The outer diameter of the cigarette holder shell is 7.0-8.8 mm, and the wall thickness is 0.1-0.3 mm.

7. The blocking device according to claim 1, characterized in that: The food-grade glue (102) is coated on the end edge of the cigarette holder shell (103), and the food-grade glue (102) is food-grade silica gel, food-grade fiber glue, food-grade resin glue, latex, modified starch glue or plant glue.

8. The plugging device according to claim 1 is characterized in that the plant fiber is one or more of wood pulp, bamboo pulp, straw pulp, hemp pulp, and cotton pulp.

9. The blocking device according to claim 8, characterized in that: The plant fiber has a single fiber linear density of 0.2-3.2 dtex, a hygroscopic regain rate of less than 15%, and a fiber breaking strength of not less than 3 cN / dtex.

10. The blocking device according to claim 1, characterized in that: The thickness of the blocking layer (101) is 0.01 mm-0.03 mm, and the layer density is 20-40 g / m 2 , air permeability is higher than 2000CU.

11. The blocking device according to claim 1, characterized in that: The plant glue is pectin or natural resin, and the animal glue is shellac.

12. The blocking device according to claim 11, characterized in that: The plant fiber is bamboo pulp, and the ratio of bamboo pulp to auxiliary materials is 10:1, wherein the auxiliary materials are a mixed liquid prepared by mixing natural resin and pectin in a mass ratio of 5:

3.

13. A plugging process using the plugging device according to any one of claims 1 to 12, characterized in that: The plugging process comprises the following steps in sequence: rolling to form a cigarette tube shell (103), so that the cigarette tube shell (103) stands upright and uses its downwardly open end as the bottom end; applying food-grade glue (102) to the bottom edge of the cigarette tube shell (103); pressing the bottom end of the cigarette tube shell (103) onto the plugging layer (101) and solidifying the food-grade glue (102); cutting the plugging layer (101) bonded to the bottom end of the cigarette tube shell (103); filling tobacco particles (2) into the cigarette tube shell (103) and filling a filter component (3) and a mouthpiece (4).

14. A plugging process using the plugging device according to any one of claims 1 to 12, characterized in that: The plugging process comprises the following steps in sequence: rolling a cigarette tube shell (103), making the cigarette tube shell (103) stand upright and filling a mouthpiece (4) and a filter component (3) into the tube shell; filling tobacco particles (2) into the cigarette tube shell (103); applying food-grade glue (102) to the open end of the cigarette tube shell (103); pressing a plugging layer (101) onto the edge of the cigarette tube shell (103) and solidifying the food-grade glue (102); The sealing layer (101) bonded to the end of the cigarette holder tube shell (103) is cut.

15. The plugging process according to claim 13 or 14, characterized in that: The various parts of the cigarette tube shell (103) are rolled simultaneously by a spiral paper tube machine to form a multi-layer composite structure.

16. The plugging process according to claim 13 or 14, characterized in that: The curing temperature of the curing process is 120-160°C.

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