A sealed heated cigarette for reducing sidestream smoke

Abstract

The present invention belongs to the field of cigarettes, and particularly relates to a sealed heated cigarette that reduces sidestream smoke. The cigarette comprises, from upstream to downstream, a tobacco section (1) sealed at the upstream end, a low-resistance section (2), and a functional filter section (3) that are coaxially abutted in sequence, and the outside of the cigarette is wrapped with an external wrapper (4); wherein the low-resistance section (2) is a tube having an axial central cavity (2-1) and circumferential sidewall through-holes (2-2); the low-resistance section (2) further comprises a barrier layer (2-3) with a certain air permeability arranged on the circumferential sidewalls of the central cavity (2-1). The cigarette of the present invention is provided with a barrier layer covering the circumferential sidewalls of the central cavity and the sidewall through-holes in the low-resistance section. The barrier layer has a certain air permeability and does not affect the inflow of external air when inhaled; when not inhaled, smoke will not escape through the sidewall through-holes, thereby effectively reducing smoke loss.

Description

Technical Field

[0001] The invention belongs to the field of cigarettes, and in particular relates to a sealed heating cigarette for reducing sidestream smoke. Background Art

[0002] Traditional tobacco, with its centuries-old history, has become an integral part of most smokers' lives. In recent years, with the improvement of living standards, issues such as smoking and health risks, as well as the harmful effects of secondhand smoke, have become increasingly prominent, and the harmful effects of traditional tobacco products have become increasingly prominent. Simultaneously, with the implementation of the WHO Framework Convention on Tobacco Control, and particularly the gradual expansion of smoking bans in public places worldwide, the tobacco product landscape has undergone significant and profound changes, accelerating the shift towards diversification and smoke-free tobacco products. New tobacco products are becoming a viable option for major multinational tobacco companies to address declining sales of traditional tobacco products.

[0003] Currently, the vast majority of heat-not-burn cigarettes use air as a smoke carrier. To ensure that the tobacco does not burn, the heating temperature applied is usually relatively low, generally not exceeding 300°C. Compared with traditional cigarettes, the tobacco flavoring components of new heat-not-burn cigarettes are difficult to fully release, and the smoke volume is insufficient. Therefore, this type of cigarette is less accepted by traditional smokers. In addition, to ensure air circulation, the tobacco end of most heat-not-burn cigarettes is an open structure, that is, the tobacco or reconstituted tobacco leaves are directly exposed to the outside, or are connected to the outside atmosphere through a certain airflow channel. When the cigarette cartridge is pulled out after smoking, tobacco residue will fall off, which can easily cause pollution to the smoking device. Therefore, this type of tobacco requires time to clean the smoking device after using it for a period of time. The presence of side-flow smoke will affect the consumer experience of heat-not-burn cigarettes.

[0004] The present invention is proposed to solve the above-mentioned problems. Summary of the Invention

[0005] The present invention provides a sealed heated cigarette for reducing sidestream smoke. The cigarette comprises, from upstream to downstream, a tobacco segment 1 with an upstream end sealed, a low-draw resistance segment 2, and a functional filter segment 3 coaxially abutted in sequence. The exterior of the cigarette is wrapped with an outer wrapper 4.

[0006] Among them, the low-resistance absorption section 2 is a tube body having an axial central cavity 2-1 and circumferential side wall through holes 2-2, and the number of the side wall through holes 2-2 is at least one; the low-resistance absorption section 2 also includes a barrier layer 2-3 with a certain air permeability arranged on the circumferential side wall of the central cavity 2-1.

[0007] Preferably, the upstream end of the sealed tobacco segment 1 is sealed in the following manner: the circumference and / or upstream end surface of the sealed tobacco segment 1 are wrapped with an airtight or controllable permeability paper-based or foil-based material to form a closed system; or the upstream end of the sealed tobacco segment 1 is coaxially abutted with a plug 5.

[0008] Preferably, a coaxial through hole 4-1 is provided on the outer wrapping member 4 at a position corresponding to the side wall through hole 2-2, and the aperture of the coaxial through hole 4-1 is not smaller than the aperture of the side wall through hole 2-2.

[0009] Preferably, a hollow tubular support layer is provided between the tube wall of the controllable absorption resistance section 2 and the barrier layer 2-3, and the side wall through hole 2-2 passes through the support layer.

[0010] Preferably, the functional filter segment 3 includes a cooling segment 3-1 and a filtering segment 3-2.

[0011] Preferably, the tobacco segment 1 includes tobacco shreds, tobacco sheets, tobacco particles, tobacco extrusion moldings or tobacco-containing gels.

[0012] Preferably, the barrier layer 2-3 completely covers the circumferential side walls of the central cavity 2-1 and the side wall through holes 2-2.

[0013] Preferably, the barrier layers 2-3 are paper-based or acetate fiber-forming materials with a certain air permeability / porosity.

[0014] The above technical solutions can be freely combined under the premise of no contradiction.

[0015] The present invention has the following beneficial effects:

[0016] 1. The present invention is the first to design a sealed cigarette that reduces sidestream smoke. When used with a heated smoking device, the fresh smoke generated replaces the internal atmosphere of the cigarette, and the oxygen content in the cigarette decreases during the heating process. At this time, even if the heating temperature is increased, combustion will not occur. Therefore, the heating temperature can be increased to fully release the aroma components of tobacco and increase the amount of smoke. In addition, the cigarette of the present invention is provided with a barrier layer covering the circumferential side walls of the central cavity and the side wall through holes in the low-resistance section. The barrier layer has a certain degree of air permeability and does not affect the inflow of external air when inhaled; when not inhaled, the smoke will not escape through the side wall through holes, thereby effectively reducing smoke loss.

[0017] 2. The closed cigarette has the tobacco section in contact with the cigarette holding cavity at one end, so there will be no tobacco residue falling and contaminating the smoking device.

[0018] 3. The sealed cigarette of the present invention is designed with a low-draw-resistance section comprising an axial central cavity and circumferential sidewall through-holes. During inhalation, ambient air enters through the sidewall through-holes and mixes with the smoke generated by the heated tobacco section within the cavity to form mainstream smoke for inhalation. Simultaneously, the ambient air entering through the sidewall through-holes during inhalation, with the high air velocity and low air pressure in the low-draw-resistance section, extracts smoke from the tobacco section. Furthermore, the ambient air also cools the smoke.

[0019] 4. In a preferred technical solution, the cigarette of the present invention utilizes a plug to seal the tobacco segments. During the cigarette production process, the plug can be rolled together with the tobacco segments, facilitating industrial production. Using a sealing film or other element to seal the tobacco segments separately would require changes to the cigarette production process, requiring significant modifications to existing equipment, making industrial production inconvenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a closed heating cigarette for reducing sidestream smoke in Example 1 of the present invention.

[0021] List of reference numerals:

[0022] 1. Tobacco section, 2. Low-resistance section, 2-1. Central cavity, 2-2. Side wall through hole, 2-3. Barrier layer, 3. Functional filter section, 3-1. Cooling section, 3-2. Filter section, 4. External wrapping, 4-1. Coaxial through hole, 5. Plug. DETAILED DESCRIPTION

[0023] The content of the present invention is further described below through specific embodiments.

[0024] Example 1

[0025] A sealed heated cigarette for reducing sidestream smoke, the cigarette comprising, from upstream to downstream, a tobacco segment 1 with an upstream end sealed, a low-draw resistance segment 2, and a functional filter segment 3 coaxially abutted in sequence, the cigarette being wrapped with an outer wrapper 4;

[0026] Among them, the low-resistance absorption section 2 is a tube body having an axial central cavity 2-1 and circumferential side wall through holes 2-2, and the number of the side wall through holes 2-2 is 2; the low-resistance absorption section 2 also includes a barrier layer 2-3 with a certain air permeability arranged on the circumferential side wall of the central cavity 2-1.

[0027] The barrier layer 2-3 is a paper-based or acetate fiber forming material with a certain air permeability. The barrier layer 2-3 completely covers the circumferential side walls of the central cavity 2-1 and the side wall through holes 2-2.

[0028] The upstream end of the sealed tobacco segment 1 is sealed in such a manner that a plug 5 is coaxially abutted against the upstream end of the sealed tobacco segment 1 .

[0029] A coaxial through hole 4 - 1 is provided on the outer wrapping member 4 at a position corresponding to the side wall through hole 2 - 2 , and the aperture of the coaxial through hole 4 - 1 is not smaller than the aperture of the side wall through hole 2 - 2 .

[0030] A hollow tubular support layer is provided between the tube wall of the controllable absorption resistance section 2 and the barrier layer 2-3, and the side wall through hole 2-2 penetrates the support layer.

[0031] The functional filter section 3 includes a cooling section 3-1 and a filtering section 3-2.

[0032] The tobacco segment 1 includes a gel containing tobacco.

[0033] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A sealed heated cigarette for reducing sidestream smoke, characterized in that: The cigarette comprises, from upstream to downstream, a tobacco section (1) sealed at the upstream end, a low-resistance section (2), and a functional filter section (3) coaxially abutted in sequence, and the exterior of the cigarette is wrapped with an external wrapper (4); The low-resistance suction section (2) is a tube having an axial central cavity (2-1) and a circumferential sidewall through hole (2-2), and the number of the sidewall through hole (2-2) is at least one; the low-resistance suction section (2) further comprises a barrier layer (2-3) with a certain air permeability and arranged on the circumferential side wall of the central cavity (2-1); A coaxial through hole (4-1) is provided on the outer wrapping member (4) at a position corresponding to the side wall through hole (2-2), and the aperture of the coaxial through hole (4-1) is not smaller than the aperture of the side wall through hole (2-2); A hollow tubular support layer is provided between the tube wall of the low absorption resistance section (2) and the barrier layer (2-3), and the side wall through hole (2-2) penetrates the support layer; The barrier layer (2-3) completely covers the circumferential side wall of the central cavity (2-1) and the side wall through hole (2-2); The upstream end of the sealed tobacco segment (1) is sealed in such a manner that the circumference and the upstream end surface of the sealed tobacco segment (1) are wrapped with an airtight paper-based or foil-based material to form a closed system.

2. The cigarette according to claim 1, characterized in that: The functional filter section (3) comprises a cooling section (3-1) and a filtering section (3-2).

3. The cigarette according to claim 1, characterized in that: The tobacco segment (1) includes tobacco shreds, tobacco sheets, tobacco particles, tobacco shaped bodies or tobacco-containing gel bodies.

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