Composite filter tip for smoke cooling of heating non-combustion cigarette and cigarette

Abstract

The invention relates to the technical field of cigarettes, and provides a composite filter tip for smoke cooling of a heat-not-burn cigarette and the cigarette, the composite filter tip comprises a hollow polylactic acid torsion net-shaped circulation section, a hollow flowing section, an acetate fiber filtering section and forming paper wrapping the hollow polylactic acid torsion net-shaped circulation section, the hollow flowing section and the acetate fiber filtering section; the hollow polylactic acid torsion net circulation section comprises a plurality of spiral net sections, a concave flow channel is formed between every two adjacent spiral net sections, a convex flow channel is formed in each spiral net section, and a central flow channel is formed in the center of the hollow polylactic acid torsion net circulation section. Different flow channels can be formed through the hollow polylactic acid torsion net-shaped circulation section made of the polylactic acid net, the smoke temperature can be effectively reduced on the premise that the smoking resistance is not increased, part of harmful aerosol particles generated after the cigarette is heated can be filtered through the arranged acetate fiber filtering section, and therefore the smoke temperature can be effectively reduced. Powerful support can be provided for smoke cooling of the heat-not-burn cigarette.

Description

Technical Field

[0001] This application belongs to the field of cigarette technology, and more specifically, relates to a composite filter for cooling the smoke of heated non-combustible cigarettes. Background Technology

[0002] Heated cigarettes are popular among consumers due to their lower tar and nicotine content. However, heated cigarettes are typically short, resulting in insufficient heat exchange and cooling of the smoke after heating. This leads to the release of large amounts of toxic substances, harming consumers' health. Furthermore, they can cause burning sensations in the mouth during inhalation, negatively impacting the user experience.

[0003] Currently, the main method for cooling cigarettes is through the use of flavor capsules. However, these capsules release toxic substances upon contact with hot smoke, which can affect the health of consumers. Therefore, it is essential to develop a simple physical structure that effectively reduces the smoke temperature through sufficient heat exchange during inhalation, without altering the draw resistance or smoke composition. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this application is to provide a composite filter for cooling the smoke of heated non-combustible cigarettes, which can cool the smoke without affecting the composition of the smoke.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a composite filter tip for cooling the smoke of heated non-combustible cigarettes is provided, comprising: a hollow polylactic acid twisted mesh flow section, a hollow flow section, and a cellulose acetate filter section, and a forming paper wrapping the hollow polylactic acid twisted mesh flow section, the hollow flow section, and the cellulose acetate filter section; the hollow polylactic acid twisted mesh flow section comprises several spiral mesh segments, a concave flow channel is formed between two adjacent spiral mesh segments, a convex flow channel is formed within each spiral mesh segment, and a central flow channel is formed at the center of the hollow polylactic acid twisted mesh flow section.

[0006] In one embodiment, the sidewall of the hollow flow section is provided with a plurality of circumferentially arranged flow holes.

[0007] In one embodiment, each of the flow holes is provided corresponding to the recessed flow channel.

[0008] In one embodiment, the circumferentially arranged flow holes are spaced at least two circles apart along the length of the hollow flow section.

[0009] In one embodiment, at least five spiral segments are provided, and the spiral angle is 20°-90°.

[0010] In one embodiment, the spacing between the two flow holes is 0.3-9 mm.

[0011] In one embodiment, the outermost diameter of the convex flow channel is larger than the innermost diameter of the concave flow channel, and the innermost diameter of the concave flow channel is larger than the diameter of the central flow channel.

[0012] In one embodiment, both ends of the hollow polylactic acid twisted mesh flow section are provided with mesh polylactic acid sheets with the same shape as its end face.

[0013] In one embodiment, the void area of ​​the hollow polylactic acid twisted mesh flow section is between 0.01 mm² and 100 mm².

[0014] Another object of this application is a cigarette comprising tobacco segments and a composite filter as described above, wherein the hollow polylactic acid twisted mesh flow section is disposed close to the tobacco segments.

[0015] The beneficial effects of the composite filter tip for cooling smoke from heated non-combustible cigarettes provided in this application are as follows: the hollow polylactic acid twisted mesh flow section made of polylactic acid mesh can form different flow channels, which can effectively reduce the smoke temperature without increasing the suction resistance. The set cellulose acetate filter section can filter some of the harmful aerosol particles generated after the cigarette is heated, which can provide strong support for cooling the smoke from heated non-combustible cigarettes. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A simplified overall structural diagram of the composite filter tip for cooling smoke from heated non-combustible cigarettes provided in an embodiment of this application;

[0018] Figure 2 A schematic diagram of the planar structure of a composite filter tip for cooling the smoke of heated non-combustible cigarettes provided in an embodiment of this application;

[0019] Figure 3 A simplified front view of the composite filter tip for cooling smoke from heated non-combustible cigarettes, omitting the forming paper, provided in an embodiment of this application.

[0020] Figure 4 A three-dimensional structural diagram of the hollow flow section in a composite filter tip for cooling smoke from heated non-combustible cigarettes, provided in an embodiment of this application;

[0021] Figure 5 This is a schematic diagram of the structure used in the suction resistance test in this application;

[0022] Figure 6 This is a schematic diagram illustrating the effect of smoke cooling in this application.

[0023] The following are the labeling elements in the figure:

[0024] 1. Hollow polylactic acid twisted mesh flow section; 11. Spiral mesh section; 12. Recessed flow channel; 13. Raised flow channel; 14. Central flow channel; 2. Hollow flow section; 21. Flow hole; 3. Fiber acetate filter section; 4. Forming paper. Detailed Implementation

[0025] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0026] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0027] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0029] like Figures 1-4As shown, a composite filter tip for cooling smoke from heated non-combustible cigarettes, provided in an embodiment of this application, will now be described. This composite filter tip includes: a hollow polylactic acid (PLA) twisted mesh flow section 1, a hollow flow section 2, and a cellulose acetate filter section 3, as well as a forming paper 4 wrapping the hollow PLA twisted mesh flow section 1, the hollow flow section 2, and the cellulose acetate filter section 3. The hollow PLA twisted mesh flow section 1 is made of twisted PLA mesh, and due to its multi-mesh structure, it allows smoke to pass through. The hollow flow section is made of cellulose acetate tubing, the cellulose acetate filter section 3 is made of cellulose acetate rods, and the forming paper 4 is thin wallpaper made of high-permeability paper rolled together. In this embodiment, the smoke is cooled for the first time by the hollow PLA twisted mesh flow section 1, and then cooled a second time by the hollow flow section 2, resulting in a good cooling effect.

[0030] In this embodiment, the hollow polylactic acid twisted mesh flow section 1 includes several spiral mesh segments 11. A recessed flow channel 12 is formed between two adjacent spiral mesh segments 11, and a raised flow channel 13 is formed within each spiral mesh segment 11. A central flow channel 14 is formed at the center of the hollow polylactic acid twisted mesh flow section 1. The flow velocity in the central flow channel 14 is the fastest, and the flow velocity in the raised flow channel 13 is the slowest. In this embodiment, the outermost diameter of the raised flow channel 13 is larger than the innermost diameter of the recessed flow channel 12, and the innermost diameter of the recessed flow channel 12 is larger than the diameter of the central flow channel 14. Figure 2 As shown, R1>R2>R3. To ensure structural stability, both ends of the hollow polylactic acid twisted mesh flow section 1 are fixed with mesh polylactic acid sheets of the same shape as their end faces by thermal connection. The material of the mesh polylactic acid sheets is the same as that used in the hollow polylactic acid twisted mesh flow section 1.

[0031] In this embodiment, the void area of ​​the hollow polylactic acid twisted mesh flow section 1 is 0.01 mm. 2 -100 mm 2 The arrangement ensures that the smoke can pass through effectively and be cooled. In this embodiment, five spiral mesh segments 11 are provided, and the cross-section of the five spiral mesh segments 11 is in the shape of plum blossom petals. Of course, six spiral mesh segments 11 can be provided. At least five spiral mesh segments 11 are provided, and the spiral twist angle is 20°-90°. The larger the twist angle, the longer the length of the concave flow channel 12 and the convex flow channel 13, and the better the cooling effect on the smoke.

[0032] To further improve the cooling effect, several circumferentially arranged flow holes 21 are provided on the side wall of the hollow flow section 2. Correspondingly, flow holes 21 are also provided at the position of the forming paper 4. These flow holes 21 allow external cold air to enter the hollow flow section 2, further cooling the smoke. To enhance the cooling effect of the cold air on the smoke, each flow hole 21 is corresponding to a recessed flow channel 12, allowing the smoke within the recessed flow channel 12 to enter the hollow flow section 2 and quickly mix with the cold air for cooling.

[0033] In this embodiment, to improve the cooling effect, at least two rings of circumferentially arranged flow holes 21 are provided along the length of the hollow flow section 2. The distance between the two rings of flow holes 21 is 0.3-9 mm.

[0034] In this embodiment, the thickness of the forming paper 4 is 0.01mm-1mm, and the length is 6-10mm. The outer diameter of the hollow polylactic acid twisted mesh flow section 1 is 5mm-100mm, and the inner diameter of the hollow flow section 2 is 1-8mm.

[0035] like Figure 5 As shown, experiments were conducted to compare the draw resistance of ordinary heated tobacco products, heated tobacco products with a hollow twisted flow channel structure (the composite filter of this embodiment), and heated tobacco products with a polylactic acid mesh structure. It can be seen that the composite filter of this embodiment has the advantage of lower draw resistance. Figure 6 As shown, the cooling effects of ordinary heated tobacco products, heated tobacco products with a hollow twisted flow channel structure (composite filter of this embodiment), and heated tobacco products with a polylactic acid mesh structure were compared through experiments. It can be found that the composite filter of this embodiment has a good cooling effect.

[0036] Another object of this application is a cigarette comprising tobacco segments and a composite filter as described above, wherein a hollow polylactic acid twisted mesh flow segment 1 is disposed close to the tobacco segments.

[0037] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A composite filter tip for cooling the smoke from heated non-combustible cigarettes, characterized in that, include: Hollow polylactic acid twisted mesh flow section (1), hollow flow section (2) and cellulose acetate filter section (3) and forming paper (4) wrapping the hollow polylactic acid twisted mesh flow section (1), hollow flow section (2) and cellulose acetate filter section (3); the hollow polylactic acid twisted mesh flow section (1) includes several spiral mesh segments (11), a recessed flow channel (12) is formed between two adjacent spiral mesh segments (11), a raised flow channel (13) is formed in each spiral mesh segment (11), and a central flow channel (14) is formed in the center of the hollow polylactic acid twisted mesh flow section (1).

2. The composite filter tip for cooling the smoke of heated non-combustible cigarettes as described in claim 1, characterized in that: The hollow flow section (2) has several circumferentially arranged flow holes (21) on its side wall.

3. The composite filter tip for cooling the smoke of heated non-combustible cigarettes as described in claim 2, characterized in that: Each of the flow holes (21) is provided corresponding to the recessed flow channel (12).

4. The composite filter tip for cooling the smoke of heated non-combustible cigarettes as described in claim 3, characterized in that: The flow holes (21) arranged in a circular pattern are spaced at least two circles apart along the length of the hollow flow section (2).

5. The composite filter tip for cooling the smoke of heated non-combustible cigarettes as described in claim 2, characterized in that: The spiral mesh segment (11) shall be at least five in number and the spiral angle shall be 20°-90°.

6. The composite filter tip for cooling the smoke of heated non-combustible cigarettes as described in claim 4, characterized in that: The spacing between the two flow holes (21) is 0.3-9 mm.

7. The composite filter tip for cooling the smoke of heated non-combustible cigarettes as described in claim 1, characterized in that: The outermost diameter of the convex flow channel (13) is greater than the innermost diameter of the concave flow channel (12), and the innermost diameter of the concave flow channel (12) is greater than the diameter of the central flow channel (14).

8. The composite filter tip for cooling the smoke of heated non-combustible cigarettes as described in claim 1, characterized in that: Both ends of the hollow polylactic acid twisted mesh flow section (1) are provided with mesh polylactic acid sheets with the same shape as its end face.

9. The composite filter tip for cooling the smoke of heated non-combustible cigarettes as described in claim 1, characterized in that: The void area of ​​the hollow polylactic acid twisted mesh flow section (1) is 0.01 mm. 2 -100 mm 2 between.

10. A cigarette, characterized in that, The filter includes tobacco segments and a composite filter tip as described in any one of claims 1-9, wherein the hollow polylactic acid twisted mesh flow section (1) is disposed close to the tobacco segments.

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