A cigarette with reduced burnt taste

Abstract

The present application relates to a kind of cigarettes with reduced burnt taste, mainly consisting of axially connected filter segments and heating smoking segments, both ends of heating smoking segments are provided with blocking elements, and the wrapping paper of heating smoking segments is hollow double-layer wrapping paper, and heating smoking segments are connected with filter segments through the hollow cavity of double-layer wrapping paper. The setting of double-sided blocking elements makes the smoking material of heating smoking segments completely free of air inflow, in a completely anaerobic isolated state, which is beneficial to prevent the burning of cigarettes when the heating temperature is increased, and the suction airflow makes the smoke quickly leave the smoking material, avoiding the generation of burnt taste.

Description

[0001] This invention relates to a cigarette with reduced burnt flavor, belonging to the field of tobacco design technology. Background Technology

[0002] The Maillard reaction is a very complex reaction process with numerous intermediate products and a very complex final product structure. Completely inhibiting the Maillard reaction is quite difficult. Furthermore, since there are many factors that affect the Maillard reaction, effective inhibition of the Maillard reaction must be the result of the synergistic effect of multiple factors. It is generally believed in the industry that the Maillard reaction can be inhibited by lowering the temperature.

[0003] Chinese Patent 202010422579.6 discloses a cigarette with a plug at the free end. Although no air enters the cigarette from the free end during inhalation to avoid combustion, the smoke has a strong burnt smell because it is still inside the cigarette and has high humidity when heated. Summary of the Invention

[0004] The purpose of this invention is to provide a cigarette packaging paper with a special structure that can reduce the burnt taste of cigarettes.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: A cigarette with reduced burnt flavor, mainly composed of an axially connected filter section and a heating and smoke-generating section, characterized in that: a sealing element is provided on the end face of the heating and smoke-generating section away from the mouthpiece end; the wrapping paper of the heating and smoke-generating section is a double-layer wrapping paper with an internal hollow cavity; the smoke-generating material is wrapped inside the double-layer wrapping paper; the hollow cavity is an axially low-resistance hollow cavity; and circumferentially distributed external ventilation holes are provided on the surface of the outer wrapping paper within a certain length from the free end. Low resistance refers to the resistance relative to the resistance at the middle smoke-generating material.

[0006] Furthermore, the double-layer wrapping paper mainly consists of an outer wrapping paper, an inner wrapping paper, and a hollow cavity formed by an axial support structure between the outer wrapping paper and the inner wrapping paper. The inner wrapping paper has evenly distributed internal ventilation holes.

[0007] The outer wrapping paper has circumferentially distributed external ventilation holes within a certain length from the free end; the hollow cavity at one end of the outer wrapping paper and the inner wrapping paper connecting to the filter tip section is connected to the filter tip section, and the ends of the outer wrapping paper and the inner wrapping paper away from the filter tip section are closed; the roll cavity formed by the inner wrapping paper is closed at both ends.

[0008] Furthermore, during heating, the evaporation pressure of the smoke-generating substances in the smoke-generating section increases, causing evaporation, which enters the hollow cavity through the inner ventilation holes on the inner wrapping paper. During inhalation, the filter section generates negative pressure, which is transmitted to the entire axial range of the heating and smoke-generating section through the axial channel of the hollow cavity. Air enters the hollow cavity from the outer ventilation holes, carrying the smoke and aroma airflow and / or smoke airflow that has already entered the hollow cavity of the double-layer wrapping paper into the filter section, and then into the oral cavity.

[0009] Furthermore, a sealing element-1 is installed on the circumferential end face of the inner wrapping paper of the heating and smoke-generating section near the mouthpiece, and a sealing element-2 is installed on the free end of the heating and smoke-generating section away from the mouthpiece. Circumferential air inlet holes are provided in the outer wrapping paper within a range of 2-6mm from the free end, with 6-38 holes and a hole diameter of 0.15-1.5mm. This arrangement results in an overall ventilation of the cigarette between 10% and 95%.

[0010] Furthermore, the number of holes is 6-12, and the hole diameter is 0.3-0.5mm. This arrangement results in an overall ventilation of 35%-60% for the cigarette, preferably 45%-60%.

[0011] Furthermore, a sealing element-1 may be provided on the circumferential end face of the inner layer of the heating and smoke-generating section near the mouthpiece, and a sealing element-2 may be provided on the free end of the heating and smoke-generating section away from the mouthpiece.

[0012] Furthermore, the supporting structure is an axially corrugated structure. The hollow cavity is an axially ventilated space formed by the outer and inner wrapping paper supported by the axially corrugated structure, ensuring smooth airflow in the axial direction of the cigarette's hollow cavity. This results in lower absorption resistance compared to cigarettes wrapped in inner wrapping paper. The corrugated structure is constructed by axially folding paper, which has multiple air-permeable pores. The thickness h of the hollow cavity is 0.5-1.2 mm.

[0013] A cigarette with reduced burnt flavor mainly consists of an axially connected filter section and a heating and smoke-generating section. The wrapping paper of the heating and smoke-generating section is a hollow double-layer wrapping paper. The heating and smoke-generating section is connected to the filter section through the hollow cavity of the double-layer wrapping paper. The double-layer wrapping paper mainly consists of an outer wrapping paper, an inner wrapping paper, and a hollow cavity formed by a support structure between the outer and inner wrapping papers. The inner wrapping paper has evenly distributed internal ventilation holes, and the outer wrapping paper has circumferential external ventilation holes within a certain length from the free end. The hollow cavity at the end where the outer and inner wrapping papers connect to the filter section is connected to the filter section. The end of the heating and smoke-generating section formed by the outer and inner wrapping papers away from the filter section is closed, and the wrapping cavity formed by the inner wrapping paper is closed near the filter end.

[0014] A cigarette with reduced burnt flavor mainly consists of an axially connected filter section, a mixing section, and a heating and smoke-generating section. The wrapping paper of the heating and smoke-generating section is a hollow double-layer wrapping paper. The heating and smoke-generating section is connected to the mixing section through the hollow cavity of the double-layer wrapping paper. The double-layer wrapping paper mainly consists of an outer wrapping paper, an inner wrapping paper, and a hollow cavity formed by a support structure between the outer and inner wrapping papers. The inner wrapping paper has evenly distributed internal ventilation holes, and the outer wrapping paper has circumferential external ventilation holes within a certain length from the free end. The hollow cavity at one end of the outer and inner wrapping papers connecting to the mixing section is connected to the mixing section. The end of the heating and smoke-generating section formed by the outer and inner wrapping papers away from the mixing section is closed. The rolling cavity formed by the inner wrapping paper is closed near the filter end.

[0015] Furthermore, the holes set on the circumference of the outer wrapping paper described in this article are preferably formed by an online laser punching machine after the cigarette is formed, but they can also be formed by pre-punching holes in the paper.

[0016] Technical Effects: The double-sided sealing elements ensure that no air flows into the inner wrapping material, creating a completely anaerobic environment that helps prevent combustion when the heating temperature is increased. The surface of the inner wrapping paper has perforations that allow smoke generated during heating to diffuse outwards, passing through the perforations into the hollow layer. This reduces the humidity of the internal material, decreases the Maillard reaction, and thus reduces the burnt taste in the cigarette. The sealing of the air layer prevents changes in airflow performance caused by product deformation during processing, thus ensuring consistent product quality. Furthermore, the precisely controlled perforations in the outer wrapping paper fix the airflow performance of the cigarette, guaranteeing consistent quality.

[0017] The outer ventilation holes are designed to maintain a certain negative pressure in the middle layer during inhalation by selecting a specific ventilation level. This helps to increase the evaporation pressure of the smoke, promotes more smoke to enter the air layer, and thus increases the amount of smoke entering the mouth.

[0018] During the smoking process, the airflow direction in the inner layer of the heated smoke-generating section is radial, perpendicular to the cigarette axis. After entering the hollow layer, it changes to axial flow, which reduces the smoke flow velocity, increases the smoke flow distance, and effectively reduces the smoke temperature. Attached Figure Description

[0019] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 and Figure 2 This is a schematic diagram of the structure of Example 1.

[0020] Figure 3 This is a schematic diagram of Example 2.

[0021] Figure 4 This is a schematic diagram of Example 3.

[0022] Figure 5 This is a color comparison chart for CIE color space coordinates.

[0023] Figure 6 This is a schematic diagram of the heated smoke-generating section in its unfolded state. Detailed Implementation

[0024] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings: Example 1 This embodiment proposes a cigarette with reduced burnt flavor, mainly composed of an axially connected filter section and a heating and smoke-generating section. Both ends of the heating and smoke-generating section are equipped with sealing elements. The wrapping paper of the heating and smoke-generating section is a hollow double-layer wrapping paper. The heating and smoke-generating section is connected to the filter section through the hollow cavity of the double-layer wrapping paper.

[0025] The double-layer wrapping paper mainly consists of an outer wrapping paper, an inner wrapping paper, and a support structure between the outer and inner wrapping papers. The inner wrapping paper has evenly distributed internal ventilation holes, while the outer wrapping paper has external ventilation holes within a certain circumferential range from its free end. Circumferential air inlets with a diameter of 0.2-0.8 mm are located within a 2-6 mm range from the free end of the outer wrapping paper. A sealing element-1 is provided on the circumferential end face of the inner wrapping paper near the mouthpiece in the heating and smoke-generating section, and a sealing element-2 is provided on the free end of the heating and smoke-generating section away from the mouthpiece. The hollow cavity at one end of the outer and inner wrapping papers connecting to the filter section is connected to the filter section, while the end of the outer and inner wrapping papers away from the filter section is closed. The roll cavity formed by the inner wrapping paper is closed at both ends. When a negative pressure is generated in the filter section, the smoke and aroma airflow and / or the smoke airflow in the heating and smoke-generating section are... It should be noted that the supporting structure can be a corrugated structure, a corrugated structure, or other conventional structures with layered support functions.

[0026] Experimental data: Note: ① Cigarette draw resistance: According to Appendix F of the National Cigarette Manufacturing Process Specification (2016 Revised Edition) standard, in section 1.3.1.2 of the cigarette product quality indicators, the standard deviation of cigarette draw resistance / Pa is required to be the set value ± 40Pa, that is, the actual draw resistance is: actual value = set value ± 40Pa --- moderate; Actual value = Set value + (40-120) Pa --- Slightly larger; Actual value > Set value + 120 Pa --- Large; ② Flue gas temperature: Flue gas inlet temperature set at 30-50℃ --- moderate; Actual temperature = set value + (5-15)℃ -- slightly higher; Actual temperature > set value + 16℃ -- High; ③ Correspondence between burnt smell and color difference of smoke generated after heating: According to the upper and lower correspondences in the same column of the experimental data table, for example: burnt smell corresponds to 5\-6\+10 sensory carbon black. Since burnt smell is a sensory perception of smell, we characterize the change of burnt smell by the color change before and after heating (similar to the correspondence between the degree of burntness and color in the process of cooking rice).

[0027] The data on the color change of the fuming substrate before and after heating is for reference. Figure 5 The color difference values ​​were obtained by comparing CIE color space coordinates. In the table, L is the object's lightness, and A and B are the color space coordinate values.

[0028] Results analysis: If the number of holes is less than 6 holes * hole diameter 0.15mm, during suction: the outer layer ventilation is too small, the air intake is small, and after the evaporating substances in the inner layer evaporate, they cannot be quickly carried away by the airflow, resulting in a larger Maillard reaction, which causes a strong burnt smell in the smoke and a large change in the color of the emitting substances.

[0029] If the number of holes exceeds 16 holes * hole diameter 1.2mm, during suction: the outer layer ventilation is too large, too much air enters, and the axially unobstructed hollow layer cannot form a certain negative pressure. As a result, the evaporation of the inner layer smoke-generating substances can only rely on the evaporation pressure generated by heating to enter the hollow layer, resulting in a slightly smaller amount of smoke, a larger Maillard reaction, a strong burnt smell in the smoke, and a large change in the color of the smoke-generating substances.

[0030] The test data is for a specific number and diameter of holes to achieve a specific ventilation level. In actual use, the same ventilation level can be achieved by designing different numbers and diameters of holes.

[0031] For example, to achieve a ventilation rate of 45%, it can be achieved either by using 12 holes with a diameter of 0.4mm as shown in the above chart, or by using 20 holes with a diameter of 0.25mm.

[0032] Example 2 A cigarette with reduced burnt flavor mainly consists of an axially connected filter section and a heating and smoke-generating section. The wrapping paper of the heating and smoke-generating section is a hollow double-layer wrapping paper. The heating and smoke-generating section is connected to the filter section through the hollow cavity of the double-layer wrapping paper. The double-layer wrapping paper mainly consists of an outer wrapping paper, an inner wrapping paper, and a support structure between the outer and inner wrapping papers. The inner wrapping paper has evenly distributed internal ventilation holes, and the outer wrapping paper has external ventilation holes within a circumferential range at a certain length from the free end. The hollow cavity at one end of the outer and inner wrapping papers connecting to the filter section is connected to the filter section, and the end of the outer and inner wrapping papers away from the filter section is closed. The free end of the roll cavity formed by the inner wrapping paper is closed.

[0033] Example 3 A cigarette with reduced burnt flavor mainly consists of an axially connected filter section, a mixing section, and a heating and smoke-generating section. The wrapping paper of the heating and smoke-generating section is a hollow double-layer wrapping paper. The heating and smoke-generating section is connected to the mixing section through the hollow cavity of the double-layer wrapping paper. The double-layer wrapping paper mainly consists of an outer wrapping paper, an inner wrapping paper, and a support structure between the outer and inner wrapping papers. The inner wrapping paper has evenly distributed internal ventilation holes, and the outer wrapping paper has external ventilation holes within a circumferential range at a certain length from the free end. The hollow cavity at one end of the outer and inner wrapping papers connecting to the mixing section is connected to the mixing section, and the end of the outer and inner wrapping papers away from the mixing section is closed. The free end of the rolling cavity formed by the inner wrapping paper is closed.

[0034] 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 transformations or substitutions that can be conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A cigarette with reduced burnt flavor, mainly composed of an axially connected filter section and a heating and smoke-generating section, characterized in that: A sealing element is provided on the end face of the heating and smoke-generating section away from the mouthpiece. The wrapping paper of the heating and smoke-generating section is a double-layer wrapping paper with an internal hollow cavity. The smoke-generating material is wrapped inside the double-layer wrapping paper. The hollow cavity is an axially low suction resistance hollow cavity. The outer wrapping paper surface is provided with circumferentially distributed external ventilation holes within a certain length from the free end. A sealing element (1) is provided on the circumferential end face of the inner wrapping paper of the heating and smoke-generating section near the mouthpiece. A sealing element (2) is provided on the free end of the heating and smoke-generating section away from the mouthpiece. The setting of the double-sided sealing element ensures that no air flows into the inner wrapping smoke-generating material. Circumferentially distributed external ventilation holes are provided within a range of 2-6mm from the free end of the outer wrapping paper. The number of holes is 6-38, and the hole diameter is 0.15-1.5mm. This setting results in an overall ventilation of 10%-95% for the cigarette.

2. The cigarette with reduced burnt flavor according to claim 1, characterized in that: Double-layer wrapping paper mainly consists of an outer wrapping paper, an inner wrapping paper, and a hollow cavity formed by an axial support structure between the outer and inner wrapping papers. The inner wrapping paper has evenly distributed internal ventilation holes.

3. A cigarette with reduced burnt flavor according to claim 1, characterized in that: During heating, the evaporation pressure of the smoke-generating substances in the smoke-generating section increases, causing evaporation. The evaporation then enters the hollow cavity through the inner ventilation holes on the inner wrapping paper. During inhalation, the filter section generates negative pressure, which is transmitted to the entire axial range of the heating and smoke-generating section through the axial channel of the hollow cavity. Air enters the hollow cavity through the outer ventilation holes, carrying the smoke and aroma airflow and / or the smoke airflow that has already entered the hollow cavity of the double-layer wrapping paper into the filter section and into the oral cavity.

4. A cigarette with reduced burnt flavor according to claim 1, characterized in that: The number of holes is 6-12, and the hole diameter is 0.3-0.5mm, resulting in an overall ventilation of 35%-60% for the cigarette.

5. A cigarette with reduced burnt flavor according to claim 4, characterized in that: The overall ventilation of the cigarette is 45%-60%.

6. A cigarette with reduced burnt flavor according to claim 2, characterized in that: The axial support structure is an axial corrugated structure, and the hollow cavity is an axially ventilated space formed by the outer and inner wrapping paper supported by the axial corrugated structure. This allows for smooth airflow in the axial direction of the hollow cavity of the cigarette, resulting in lower absorption resistance compared to cigarettes wrapped in inner wrapping paper.

7. A cigarette with reduced burnt flavor according to claim 6, characterized in that: The corrugated structure is formed by axially folding paper, and the paper has multiple air pores; the thickness h of the hollow cavity is 0.5-1.2 mm.

8. A cigarette with reduced burnt flavor, mainly composed of an axially connected filter section and a heating and smoke-generating section, characterized in that: The heating and smoke-generating section is a hollow double-layered wrapping paper. The smoke-generating section is connected to the filter section through the hollow cavity of the double-layered wrapping paper. The double-layered wrapping paper mainly consists of an outer wrapping paper, an inner wrapping paper, and a hollow cavity formed by a support structure between the outer and inner wrapping papers. The inner wrapping paper has evenly distributed internal ventilation holes, and the outer wrapping paper has circumferential external ventilation holes within a certain length from the free end. The hollow cavity at the end where the outer and inner wrapping papers connect to the filter section is connected to the filter section. The end of the heating and smoke-generating section formed by the outer and inner wrapping papers away from the filter section is closed, and the roll cavity formed by the inner wrapping paper is closed near the filter end, so that no air flows into the inner wrapping smoke-generating material.

9. A cigarette with reduced burnt flavor, mainly composed of an axially connected filter section, a mixing section, and a heating and smoke-generating section, characterized in that: The heating and smoke-generating section is a hollow double-layered wrapping paper. The heating and smoke-generating section is connected to the mixing section through the hollow cavity of the double-layered wrapping paper. The double-layered wrapping paper mainly consists of an outer wrapping paper, an inner wrapping paper, and a hollow cavity formed by a support structure between the outer and inner wrapping papers. The inner wrapping paper has evenly distributed internal ventilation holes, and the outer wrapping paper has circumferential external ventilation holes within a certain length from the free end. The hollow cavity at one end of the outer and inner wrapping papers connecting to the mixing section is connected to the mixing section. The end of the heating and smoke-generating section formed by the outer and inner wrapping papers away from the mixing section is closed. The roll cavity formed by the inner wrapping paper is closed near the filter end, ensuring that no air flows into the smoke-generating material wrapped in the inner layer.

10. A cigarette with reduced burnt flavor according to any one of claims 1-9, characterized in that: The holes set on the circumference of the outer wrapping paper are formed by an online laser punching machine after the cigarette is formed.

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