Heated cigarette and hollow filter rod for heated cigarette

Abstract

The utility model provides a kind of hollow filter rod for heating cigarette and heating cigarette, belong to heating tobacco technical field.The hollow filter rod for heating cigarette includes hollow paper tube, wherein, hollow paper tube is equipped with sealing membrane.The heating filter rod of the utility model replaces acetate filter tip section in conventional heating cigarette by hollow paper tube and sealing membrane, can improve smoke release amount, and reduce smoke dry sensation, while reducing the unpleasant breath brought by paper baking, improve the suction experience of user.

Description

Technical Field

[0001] This utility model relates to the field of heated tobacco, and in particular to a heated cigarette and a hollow filter rod for heated cigarettes. Background Technology

[0002] With increasing public awareness of safety and health, the sales of heated cigarettes are growing both domestically and internationally. Currently, heated cigarettes suffer from issues such as low smoke release, a strong dryness in the smoke, and a noticeable paper-like aroma. Research indicates that approximately 65% ​​of the main components released by the heated tobacco in heated cigarettes are retained in the hollow section, and about 13% in the acetate filter section, leaving only about 22% to be inhaled. Furthermore, the heating temperature surrounding heated cigarettes is around 250°C, while conventional hollow paper tubes carbonize at around 180°C, releasing a papery aroma that is unpleasant and negatively impacts the smoking experience. Therefore, a heated cigarette product that improves the user's smoking experience is needed. Utility Model Content

[0003] In view of this, in order to at least partially solve at least one of the aforementioned technical problems, the present invention provides a heated cigarette and a hollow filter rod for heated cigarettes.

[0004] According to one embodiment of the present invention, a hollow filter rod for heating cigarettes is provided, comprising a hollow paper tube, wherein a sealing membrane is provided inside the hollow paper tube, and the sealing membrane comprises non-woven fabric.

[0005] According to another embodiment of the present invention, a heated cigarette is provided, comprising tobacco segments and the aforementioned hollow filter rod for heated cigarettes.

[0006] According to embodiments of this invention, the hollow paper tube can reduce the retention of the main components released by heated tobacco in heated cigarettes, increase smoke volume, reduce the dryness of the smoke, and reduce the unpleasant odor caused by paper baking. This invention uses a hollow paper tube and a sealing membrane to replace the acetate filter section in conventional heated cigarettes, increasing the length of the hollow paper tube compared to conventional heated cigarettes, further increasing smoke release, reducing the dryness of the smoke, and minimizing the unpleasant odor caused by paper baking. Simultaneously, the sealing membrane in the hollow paper tube acts as a filter, preventing the user from inhaling tobacco dust during smoking, further improving the user's smoking experience. Attached Figure Description

[0007] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

[0008] Figure 1 This is a three-dimensional schematic diagram of the heating cigarette of this utility model;

[0009] Figure 2 This is a schematic diagram of the thermogravimetric results of the heat resistance test of different raw materials for the hollow paper tube of this utility model.

[0010] Explanation of reference numerals in the attached figures:

[0011] 1. Tobacco shreds; 2. Hollow paper tube; 3. Sealing film. Detailed Implementation

[0012] The embodiments of the present invention will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In the following detailed description, numerous specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the present invention.

[0013] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "comprising" as used herein indicates the presence of features, steps, or operations, but does not exclude the presence or addition of one or more other features.

[0014] In conventional heated cigarettes, hollow filter rods typically consist of a hollow paper tube and a cellulose acetate filter section. The hollow paper tube reduces the retention of aerosols and other smoke releases and improves the temperature resistance of the heated cigarette, while the cellulose acetate filter section filters tobacco dust and makes the heated cigarette look more like a traditional cigarette. However, in developing this invention, it was discovered that current heated cigarettes generally suffer from low smoke release, a strong dryness in the smoke, and a noticeable paper-baking aroma. Therefore, the inventors have proposed a hollow filter rod for heated cigarettes that replaces the cellulose acetate filter section in conventional heated cigarettes with a hollow paper tube and a sealing membrane. This increases the length of the hollow paper tube in the filter rod, further reducing the retention of smoke releases and improving the temperature resistance of the heated cigarette.

[0015] Specifically, according to one embodiment of the present invention, a hollow filter rod for heating cigarettes is provided, such as... Figure 1 As shown, it includes a hollow paper tube 2, wherein a sealing film 3 is provided inside the hollow paper tube 2, and the sealing film 3 includes non-woven fabric.

[0016] According to some embodiments of this invention, the hollow paper tube can reduce the retention of smoke emissions, increase the amount of smoke while reducing the dryness of the smoke. Simultaneously, the heat resistance of the hollow paper tube can reduce impurities such as those from paper baking. The sealing film prevents the user from inhaling tobacco dust during smoking. By replacing the cellulose acetate filter section in conventional heated cigarettes with a hollow paper tube and sealing film, the length of the hollow paper tube is increased, thereby further improving the user's smoking experience with heated cigarettes.

[0017] According to some embodiments of the present invention, the thickness of the nonwoven fabric is 0.05~0.3 mm, for example 0.1 mm, 0.15 mm, 0.2 mm and 0.25 mm.

[0018] According to an embodiment of the present invention, the above-mentioned nonwoven fabric can be perforated to increase its air permeability. Preferably, there are more than 5 perforations. The pore size is 100~500 μm, for example, 150 μm, 200 μm, 250 μm, 300 μm, 350 μm and 400 μm.

[0019] According to some embodiments of the present invention, the length of the hollow paper tube is 25-45 mm, for example 27 mm, 30 mm, 35 mm and 40 mm; the length between the sealing film and one open end of the hollow paper tube is 7-13 mm, for example 8 mm, 9 mm, 10 mm, 11 mm and 12 mm.

[0020] According to some embodiments of the present invention, the hollow paper tube has a multi-layer structure, including: at least one hydrophobic layer and at least one heat-resistant layer; wherein, the innermost layer of the multi-layer structure is a hydrophobic layer.

[0021] According to some embodiments of this utility model, the innermost layer of the hollow paper tube is a hydrophobic layer, which can reduce the physical interception and adsorption of aerosols and moisture in the hollow paper tube. The heat-resistant layer can improve the heat resistance of the hollow paper tube, thereby reducing impurities such as those from paper baking.

[0022] According to some embodiments of the present invention, the hydrophobic layer includes paper containing an in-sizing agent and a hydrophobic coating on the paper surface.

[0023] According to some embodiments of this utility model, the above-mentioned slurry sizing agent includes an alkyl ketene dimer, and the addition amount of the slurry sizing agent is 0.1~0.5%, for example 0.2%, 0.3% and 0.4%; the hydrophobic coating includes dimethyl silicone oil, and the coating amount of the hydrophobic coating is 0.1~3 g·cm³. -2 For example, 0.5 g·cm -2 1 g·cm -2 1.5 g·cm -2 2 g·cm -2 and 2.5 g·cm -2 .

[0024] According to some embodiments of this utility model, using alkyl ketene dimers as internal sizing agents can further improve the hydrophobic effect of the hydrophobic layer. If too much internal sizing agent is added, it will affect the physical properties of the paper after forming, such as hardness; if too little is added, it will affect the hydrophobic effect. Dimethyl silicone oil has good hydrophobicity and can form a dense layer on the paper surface, further reducing the adsorption and physical interception of aerosols and moisture. If the coating amount of the hydrophobic coating is too large, it will affect the physical properties of the paper after forming, such as hardness; if the coating amount of the hydrophobic coating is too small, it will affect the hydrophobic effect.

[0025] According to some embodiments of the present invention, the heat-resistant layer comprises paper made of pure cotton pulp containing heat-resistant fillers, the heat-resistant fillers comprising at least one of calcium carbonate, kaolin, magnesium oxide, zinc oxide and titanium dioxide.

[0026] According to some embodiments of this utility model, the heat resistance properties of papers made from different raw materials are compared, such as... Figure 2 As shown, paper made from pure cotton pulp exhibits better temperature resistance. This is likely due to the higher cellulose content of pure cotton pulp, which results in better temperature resistance compared to other raw materials.

[0027] According to some embodiments of the present invention, the above-mentioned heat-resistant filler accounts for 15% to 25% of the mass of the paper, for example, 17%, 19%, 21% and 23%.

[0028] According to some embodiments of this utility model, if the mass ratio of heat-resistant filler in paper is too low, it will affect the heat resistance of paper; if the mass ratio is too high, it will affect the physical properties of paper such as hardness after forming.

[0029] According to another embodiment of the present invention, a heated cigarette is provided, such as... Figure 1 As shown, it includes tobacco segment 1 and a hollow filter rod for heated cigarettes as described above.

[0030] The present invention will be further described in detail below with reference to specific embodiments.

[0031] Example 1

[0032] The paper pulp, comprising plant fibers, including softwood pulp and hardwood pulp in a mass ratio of 5:5; the pulp is mixed and beaten to a freeness of 50°SR; 0.3% by mass of alkyl ketene dimer (internal sizing agent) of plant fibers, 2% by mass of polyamide epichlorohydrin resin (wet strength agent) of plant fibers, and 1% by mass of cationic polyacrylamide (retention aid) of plant fibers are added to obtain a composite pulp; dimethyl silicone oil is provided, and after the composite pulp is formed by wire forming, the above-mentioned dimethyl silicone oil is coated on its surface at a coating amount of 1.0 g·cm³.-2 The above materials are dried using two sets of drying cylinders. The pressure of the rollers inside the first set of drying cylinders is 100 kg·cm². -1 The drying cylinder temperature is 130 ℃, and the drying time is 20 min. The pressure of the rollers inside the second set of drying cylinders is 60 kg·cm. -1 The drying cylinder temperature was 100 ℃, and the drying time was 30 min. After the above materials were slit, hydrophobic base paper was obtained with a basis weight of 47 g·cm³. -3 ;

[0033] Pure cotton pulp is provided and beaten to a freeness of 50°SR. 20% (by weight) of calcium carbonate, 2% (by weight) of polyamide epichlorohydrin resin (wet strength agent), and 1% (by weight) of cationic polyacrylamide (retention aid) are added to obtain a composite pulp. After the composite pulp is formed using wire forming, it is dried using two sets of drying cylinders. The pressure of the rollers inside the first drying cylinder is 100 kg·cm². -1 The drying cylinder temperature is 130℃, and the drying time is 20 min. The pressure of the rollers inside the second set of drying cylinders is 60 kg·cm. -1 The drying cylinder temperature was 100℃, and the drying time was 30 min. After the above materials were slit, the heat-resistant base paper was obtained with a basis weight of 50 g·cm³. -3 ;

[0034] A nonwoven fabric with a thickness of 0.1 mm was perforated with 5 holes in a time of 100 μs to obtain a sealing film.

[0035] The above-mentioned hydrophobic layer and heat-resistant layer are spirally rolled to obtain a hollow paper tube, wherein the innermost layer is a hydrophobic layer; the hollow paper tube is cut to obtain a hollow paper tube with a length of 26 mm; a sealing film is laminated with the hollow paper tube at a distance of 7 mm from the opening on one side of the hollow paper tube to obtain a hollow filter rod for heated cigarettes.

[0036] Example 2

[0037] The difference from Example 1 is that, in the preparation of the hydrophobic layer, the mass ratio of softwood pulp to hardwood pulp in the plant fiber is 4:6, the freeness is 60°SR, the added alkyl ketene dimer is 0.5% of the plant fiber mass, and the coating amount of dimethyl silicone oil is 2.0 g·cm³. -2 In the preparation of the heat-resistant layer, the beating degree is 60°SR, and the added heat-resistant filler is titanium dioxide.

[0038] Comparative Example 1

[0039] The paper pulp, comprising plant fibers, including softwood pulp and hardwood pulp in a mass ratio of 5:5; the pulp is mixed and beaten to a freeness of 50°SR; 0.01% by mass of alkyl ketene dimer (internal sizing agent) of plant fibers, 2% by mass of polyamide epichlorohydrin resin (wet strength agent) of plant fibers, and 1% by mass of cationic polyacrylamide (retention aid) of plant fibers are added to obtain a composite pulp; dimethyl silicone oil is provided, and after the composite pulp is formed by wire forming, the above-mentioned dimethyl silicone oil is coated on its surface at a coating amount of 0.05 g·cm³. -2 The above materials are dried using two sets of drying cylinders. The pressure of the rollers inside the first set of drying cylinders is 100 kg·cm². -1 The drying cylinder temperature is 130 ℃, and the drying time is 20 min. The pressure of the rollers inside the second set of drying cylinders is 60 kg·cm. -1 The drying cylinder temperature was 100 ℃, and the drying time was 30 min. After the above materials were slit, hydrophobic base paper was obtained with a basis weight of 47 g·cm³. -3 ;

[0040] The pulp, comprising plant fibers, includes softwood pulp and hardwood pulp in a 5:5 mass ratio; the pulp is mixed and beaten to a freeness of 50°SR; 20% titanium dioxide (by mass of pure plant fibers), 2% polyamide epichlorohydrin resin (wet strength agent) (by mass of plant fibers), and 1% cationic polyacrylamide (by mass of plant fibers) (retention aid) are added to obtain a composite pulp; after the composite pulp is formed by wire forming, the material is dried using two sets of drying cylinders, wherein the pressure of the rollers inside the first set of drying cylinders is 100 kg·cm. -1 The drying cylinder temperature is 130 ℃, and the drying time is 20 min. The pressure of the rollers inside the second set of drying cylinders is 60 kg·cm. -1 The drying cylinder temperature was 100 ℃, and the drying time was 30 min. After the above materials were cut, the heat-resistant base paper was obtained with a basis weight of 60 g·cm³. -3 ;

[0041] The above-mentioned hydrophobic layer and heat-resistant layer are spirally rolled to obtain a hollow paper tube, which is then combined with a cellulose acetate filter rod to form a filter rod for heated cigarettes.

[0042] Comparative Example 2

[0043] The pulp, comprising plant fibers, includes softwood pulp and hardwood pulp in a 5:5 mass ratio; the pulp is mixed and beaten to a freeness of 50°SR; 2% by mass of polyamide epichlorohydrin resin (wet strength agent) and 1% by mass of cationic polyacrylamide (retention aid) are added to obtain a composite pulp; after the composite pulp is formed by wire forming, the material is dried using two sets of drying cylinders, wherein the pressure of the rollers inside the first set of drying cylinders is 100 kg·cm. -1 The drying cylinder temperature is 130 ℃, and the drying time is 20 min. The pressure of the rollers inside the second set of drying cylinders is 60 kg·cm. -1 The drying cylinder temperature was 100 ℃, and the drying time was 30 min. After the above materials were slit, the base paper was obtained with a basis weight of 64 g·cm³. -3 The paper is spirally wound to obtain a hollow paper tube, which is then combined with a cellulose acetate filter rod to form a filter rod for heated cigarettes.

[0044] The filter rods used in the examples and comparative examples were made into heated cigarettes with a circumference of 21 mm and a filter tip ventilation of 50%. The cigarettes were then smoked using a smoking machine. The main components nicotine, moisture, and glycerol trapped in the hollow paper tube and captured in the filter tip section or sealing membrane were determined by gas chromatography according to the CORESTA 84 recommended method. The results are shown in Table 1.

[0045] Table 1

[0046] Moisture Retention Rate (mg / vial) Moisture capture amount (mg / vial) Nicotine retention limit (mg / cigarette) Nicotine capture amount (mg / cigarette) Glycerin Retention Capacity (mg / vial) Glycerol capture amount (mg / vial) Example 1 16.5 8.0 1.8 1.2 10.5 3.3 Example 2 15.3 8.7 1.7 1.3 9.6 3.6 Comparative Example 1 23.1 4.7 2.5 0.8 13.4 2.1 Comparative Example 2 28.5 3.6 2.8 0.7 14.8 1.8

[0047] According to Table 1, the moisture retention and capture amounts of Comparative Examples 1 and 2 are higher than those of Examples 1 and 2, which proves that using hollow paper tubes and sealing membranes as hollow filter rods can increase the moisture content of the main components released by smoke, thereby reducing the dryness of the smoke. The nicotine and glycerol retention and capture amounts in Comparative Examples 1 and 2 are also higher than those in Examples 1 and 2, which proves that using hollow paper tubes and sealing membranes as hollow filter rods, and that the amount of sizing agent added to the hydrophobic layer in the hollow paper tube is 0.1~0.5%, and the coating amount of the hydrophobic coating is 0.1~3 g·cm³. -2 When heated, it can significantly reduce the interception and capture of aerosols in heated cigarettes, thereby increasing the amount of smoke released and improving the user's smoking experience.

[0048] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hollow filter rod for a heat-not-burn cigarette, characterized by, It includes a hollow paper tube (2), wherein the hollow paper tube (2) is provided with a sealing film (3), and the sealing film (3) includes a non-woven fabric.

2. The hollow filter plug for a heated cigarette according to claim 1, wherein The nonwoven fabric has a thickness of 0.05~0.3 mm and a pore size of 100~500 μm.

3. The hollow filter plug for a heated cigarette according to claim 1, wherein The length of the hollow paper tube is 25-45 mm, and the length between the sealing film and one open end of the hollow paper tube is 7-13 mm.

4. The hollow filter plug for a heated cigarette according to claim 1, wherein The hollow paper tube has a multi-layer structure, including: at least one hydrophobic layer and at least one heat-resistant layer; The innermost layer of the multilayer structure is a hydrophobic layer.

5. The hollow filter plug for a heated cigarette according to claim 4, characterized by The hydrophobic layer includes paper containing an in-sizing agent and a hydrophobic coating on the paper surface.

6. The hollow filter plug for a heated cigarette according to claim 5, characterized by The internal sizing agent comprises alkyl alkene ketone dimer, the adding amount of the internal sizing agent is 0.1-0.5%, the hydrophobic coating comprises dimethyl silicone oil, the coating amount of the hydrophobic coating is 0.1-3 g·cm -2 .

7. The hollow filter plug of claim 4, wherein The heat-resistant layer comprises paper made of pure cotton pulp containing heat-resistant fillers, wherein the heat-resistant fillers include at least one of calcium carbonate, kaolin, magnesium oxide, zinc oxide, and titanium dioxide.

8. The hollow filter plug for a heated cigarette according to claim 7, characterized by, The heat-resistant filler accounts for 15-25% of the mass of the paper.

9. A heated cigarette, comprising tobacco segments (1) and a hollow filter rod for heated cigarettes as claimed in any one of claims 1 to 8.

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