阅读说明：本技术 一种气溶胶生成结构、制备方法及应用 (Aerosol generating structure, preparation method and application ) 是由 陈昀 杨占平 苏凯 张丽 窦峰 黄海建 沈晶晶 丁佳柱 杨广美 于 2019-10-15 设计创作，主要内容包括：一种气溶胶生成结构,包括气溶胶雾化单元和烟气降温单元；所述烟气降温单元中的降温结构包括具有高导热系数的滤棒,所述滤棒中包含可供卷烟烟气通过的间隙；所述高导热系数的滤棒的导热系数为0.058W/mK以上。所述滤棒是由非织造材料制成。所述可供卷烟烟气通过的间隙是立体的、贯通的,非线性的间隙。所述非织造材料是能降低卷烟烟气温度、对卷烟烟气中有效成分吸附率低的非织造材料。所述非织造材料片状具有绒毛,绒毛和绒毛之间相互接触形成三维结构。本发明通过调整非织造材料含量和厚度,可以方便地控制滤棒的吸阻,在减少对卷烟烟气的吸附过滤条件下,同时能快速、大幅降低卷烟烟气的温度,且不对烟气带来杂气。(An aerosol generating structure comprising an aerosol atomizing unit and a flue gas cooling unit; the cooling structure in the smoke cooling unit comprises a filter stick with high heat conductivity coefficient, and the filter stick comprises a gap through which cigarette smoke can pass; the heat conductivity coefficient of the filter stick with high heat conductivity coefficient is more than 0.058W/mK. The filter stick is made of non-woven materials. The gap for cigarette smoke to pass through is a three-dimensional, through and nonlinear gap. The non-woven material can reduce the temperature of cigarette smoke and has low adsorption rate to effective components in the cigarette smoke. The nonwoven sheet has fluff, and the fluff are in contact with each other to form a three-dimensional structure. The invention can conveniently control the suction resistance of the filter stick by adjusting the content and the thickness of the non-woven material, can quickly and greatly reduce the temperature of the cigarette smoke under the condition of reducing the adsorption and filtration of the cigarette smoke, and does not bring miscellaneous gas to the smoke.)

1. An aerosol generating structure comprising an aerosol atomizing unit and a flue gas cooling unit; the method is characterized in that: the cooling structure in the smoke cooling unit comprises a filter stick with high heat conductivity coefficient, and the filter stick comprises a gap through which cigarette smoke can pass; the heat conductivity coefficient of the filter stick with high heat conductivity coefficient is more than 0.058W/mK.

2. An aerosol-generating structure according to claim 1, wherein: the filter stick with high thermal conductivity coefficient is made of non-woven materials.

3. An aerosol-generating structure according to claim 1, wherein: the gap for cigarette smoke to pass through is a three-dimensional, through and nonlinear gap.

4. An aerosol-generating structure according to claim 1, wherein: the filter stick comprises a non-woven material and a wrapping material; the non-woven material is folded to form a cylinder shape, and the wrapping material wraps the outside to form the filter stick with a cylinder structure.

5. An aerosol-generating structure according to claim 2, wherein: the non-woven material can reduce the temperature of cigarette smoke and has low adsorption rate to effective components in the cigarette smoke.

6. An aerosol-generating structure according to claim 2, wherein: the non-woven material sheet is provided with fluff, and the fluff are contacted with each other to form a three-dimensional structure; the nonwoven material has pores inside the fibers and between the fibers.

7. An aerosol-generating structure according to claim 2, wherein: the nonwoven material has a thickness of 0.8mm or less.

8. An aerosol-generating structure according to claim 2, wherein: the non-woven material is formed by mixing basic fibers and fibers with high thermal conductivity coefficient.

9. An aerosol-generating structure according to claim 8, wherein: the non-woven material contains 5 wt% -99 wt% of basic fiber and 1 wt% -95 wt% of high-thermal-conductivity-coefficient fiber.

10. An aerosol-generating structure according to claim 8, wherein: the fiber heat conductivity coefficient with high heat conductivity coefficient is more than 0.4W/mK; and/or, the high thermal conductivity fibers are metal fibers; and/or, the high thermal conductivity fiber comprises: carbon fibers, ceramic fibers, aluminum silicate fibers, and aluminum fibers, stainless steel fibers, copper fibers; and/or the basic fiber is cellulose acetate fiber, polylactic acid fiber, cotton, polyester cotton, wool, polypropylene fiber, acrylic fiber, polyester fiber and polyurethane fiber.

11. An aerosol-generating structure according to claim 1, wherein: the circumference of the filter stick is 18 mm-28 mm.

12. An aerosol-generating structure according to claim 1, wherein: the porosity of the filter stick is 20% -90%.

13. An aerosol-generating structure according to claim 8, wherein: the cross-sectional shape of the fiber includes a Y-shape, a circular shape, an X-shape, or a random shape.

14. An aerosol-generating structure according to claim 8, wherein: the fibers have a linear density of 1 denier to 40 denier.

15. An aerosol-generating structure according to claim 8, wherein: the fibers have a length of 15mm to 80 mm.

16. An aerosol-generating structure according to claim 4, wherein: the wrapping material is filter stick wrapping paper with the gram weight of 20 g-40 g and the thickness of 0.08 mm-0.12 mm.

17. An aerosol-generating structure according to claim 1, wherein: the device also comprises a hollow pipe part which is positioned between the aerosol atomization unit and the smoke cooling unit and is connected with the aerosol atomization unit and the smoke cooling unit.

18. An aerosol-generating structure according to claim 1 or 17, wherein: the filter tip part is connected with the smoke cooling unit; the filter tip part is positioned at the downstream of the smoke cooling unit; the "downstream" is the spatial orientation defined in terms of the direction of smoke flow and refers to the relative position closer to the smoker's mouth when smoking.

19. A method of producing an aerosol-generating structure according to claim 17 or 18, wherein: the filter stick is an acetate fiber filter stick; the hollow pipe part is an acetate fiber hollow filter tip.

20. A method of making an aerosol-generating structure according to any of claims 1 to 19, wherein: and cutting the smoke cooling unit to a fixed length and then combining the cut smoke cooling unit with other components.

21. A method of producing an aerosol-generating structure according to claim 20, wherein:

the preparation of the filter stick with high heat conductivity coefficient in the smoke cooling unit comprises the following steps: extracting a non-woven material, leveling the non-woven material by airflow, clamping and conveying the non-woven material by a pair of rollers, drafting the non-woven material by a thread pair roller, applying a plasticizer and a cooling agent, retracting and finishing the non-woven material, conveying the non-woven material by a high-pressure nozzle, wrapping the non-woven material by forming paper, and slitting a non-woven material filter rod to a fixed length by a cutter.

22. Use of an aerosol-generating structure according to any of claims 1 to 19 in a cigarette and in a heat-not-burn cigarette.

Technical Field

The invention belongs to the technical field of tobacco, and relates to smoke treatment, in particular to a structure for reducing the smoke temperature of a cigarette.

Background

With the increasing severity of the global smoking control environment and the growing concern of consumers on health, the research and development of a novel tobacco product capable of comprehensively and greatly reducing the release amount of harmful components in tobacco gradually becomes the key development point of the tobacco industry of all countries in the world. The cigarette without burning is a novel tobacco product which heats the cut tobacco by a special heat source (below 500 ℃ or even lower) and only heats the cut tobacco without burning. Researches show that the release amount of harmful components in tobacco smoke is closely related to heating and burning temperature, and the release amount of the harmful components in the smoke can be obviously reduced by reducing the heating or burning temperature. The heating non-combustion type tobacco products are developed and researched by large international tobacco companies such as Philippi Morris production company (called Feimo for short) and R.J. Reynolds tobacco company (called Reynolds for short), and especially patent applications are made on heating non-combustion type cigarette cigarettes. Chinese patents applied by Felmo tobacco company include CN96194107.3, CN201190000997.0, CN201280018570.2, CN201280026033.2, CN201280054623.6, CN201280048973.1, CN201280054563.8, CN201180016009.6, CN 101778578A, CN 103889254A, etc.; chinese patents CN201180031721.3 and CN200780045783.3, etc. applied by Reynolds tobacco corporation all disclose the cigarette technology of heating non-combustion type cigarette. In China, tobacco companies such as Yunan Zhongyan and Zhejiang Zhongyan also make related patent applications for heating non-combustion cigarettes, such as CN201710643438, CN201520442651, CN201710393624 and CN 201710391934.6. However, the first two commercial electrically heated non-combustible cigarette products (Accord, HeatBar) and other products in the market, which are introduced by Felmo tobacco corporation, still have many problems, wherein the central problem is that the electrically heated non-combustible cigarette has poor smoking feeling, which is embodied by the problems of high smoke temperature, poor smoke smoking uniformity and the like, which limits the market popularization to some extent. At present, the research on heating non-combustion type cigarettes at home and abroad mainly focuses on cigarette devices, cigarette design, cigarette paper, heating modes, heater types and the like, and no relevant documents and patent reports are found for the mixed non-woven materials used in the cooling section materials of the cigarettes.

Disclosure of Invention

In view of the foregoing technical needs and the drawbacks of the prior art, an object of the present invention is to provide a technique for reducing the smoke temperature of a tobacco product, and to provide a structure for rapidly reducing the smoke temperature of a cigarette, with low smoke resistance and low filtration, in particular, a filter rod structure, a method for preparing the same, and an application thereof.

In order to achieve the purpose, the invention adopts the technical scheme that:

an aerosol generating structure for heating non-combustible cigarettes comprises an aerosol atomizing unit and a smoke cooling unit; the cooling structure in the smoke cooling unit comprises a filter stick with high heat conductivity coefficient, and the filter stick comprises a gap through which cigarette smoke can pass; the heat conductivity coefficient of the filter stick with high heat conductivity coefficient is more than 0.058W/mK.

Further, the filter stick with high thermal conductivity coefficient is made of non-woven materials.

Optionally, the gap through which the cigarette smoke passes is a three-dimensional, through, non-linear gap.

Optionally, the filter rod comprises a nonwoven material and a wrapping material; the non-woven material is folded to form a cylinder shape, and the wrapping material wraps the outside to form the filter stick with a cylinder structure.

Optionally, the non-woven material is a non-woven material which can reduce the temperature of cigarette smoke and has low adsorption rate to effective components in the cigarette smoke.

Optionally, the nonwoven sheet has fluff, the fluff and fluff contacting each other to form a three-dimensional structure, and the nonwoven has pores inside the fibers.

Optionally, the nonwoven material has a thickness of 0.8mm or less.

Optionally, the nonwoven material is a blend of base fibers and fibers having a high thermal conductivity.

Optionally, the nonwoven material contains 5 wt% to 99 wt% of the base fiber and 1 wt% to 95 wt% of the high thermal conductivity fiber.

Optionally, the fiber thermal conductivity of the high thermal conductivity is 0.4W/mK or more; and/or, the high thermal conductivity fibers are metal fibers; and/or, the high thermal conductivity fiber comprises: carbon fibers, ceramic fibers, aluminum silicate fibers, and the like, and metal fibers such as aluminum fibers, stainless steel fibers, and copper fibers; and/or the basic fiber is cellulose acetate fiber, polylactic acid fiber, cotton, polyester cotton, wool, polypropylene fiber, acrylic fiber, polyester fiber, polyurethane fiber and the like.

Optionally, the circumference of the filter stick is 18mm to 28 mm.

Optionally, the porosity of the filter stick is 20% to 90%.

Optionally, the fiber cross-sectional shape comprises a Y-shape, a circular shape, an X-shape, or a random shape.

Optionally, the fibers have a linear density of 1 denier to 40 denier.

Optionally, the fibers have a length of 15mm to 80 mm.

Optionally, the wrapping material is filter tip wrapping paper with a gram weight of 20 g-40 g and a thickness of 0.08 mm-0.12 mm.

Optionally, the aerosol-generating structure further comprises a hollow tube portion located between and connected to the aerosol atomization unit and the flue gas cooling unit.

Optionally, the aerosol-generating structure further comprises a filter portion engaged with the smoke cooling unit; the filter tip part is positioned at the downstream of the smoke cooling unit; the "downstream" is the spatial orientation defined in terms of the direction of smoke flow and refers to the relative position closer to the smoker's mouth when smoking.

Optionally, the filter stick is an acetate fiber filter stick; the hollow pipe part is an acetate fiber hollow filter tip.

The use of an aerosol-generating article as described above in a cigarette and a heated non-burning cigarette.

In the above method of manufacturing an aerosol-generating structure, the flue gas cooling unit is cut to a fixed length and then combined with other components.

Optionally, the preparation of the filter stick with high thermal conductivity in the smoke cooling unit comprises the following steps: extracting a non-woven material, leveling the non-woven material by airflow, clamping and conveying the non-woven material by a pair of rollers, drafting the non-woven material by a thread pair roller, applying a plasticizer and a cooling agent, retracting and finishing the non-woven material, conveying the non-woven material by a high-pressure nozzle, wrapping the non-woven material by forming paper, and slitting a non-woven material filter rod to a fixed length by a cutter.

Compared with a reference aerosol generating product containing an acetate fiber tow filter stick, the aerosol generating product containing the smoke cooling functional unit has a good cooling effect.

The invention provides an aerosol generating product containing a smoke cooling function unit, which comprises a plurality of units and is formed by assembling a bar in a bar composite forming mode. The unit comprises an aerosol atomization unit and a smoke temperature reduction unit located downstream of the aerosol atomization unit within the composite shaped article. The "downstream" is the spatial orientation defined in terms of the direction of smoke flow and refers to the relative position closer to the smoker's mouth when smoking.

In some applications, the smoke cooling unit is composed of an aggregation of non-woven material made up of a mixture of basic fibers and fibers with a high thermal conductivity (0.4W/mK or more). When the flue gas colloidal sol passes through the cooling unit, the functional fiber with high heat conductivity coefficient generates quick heat conduction, and the internal material of the cooling unit has a three-dimensional arrangement structure, so that the transverse conduction of heat energy is facilitated, and a better cooling effect is achieved. Meanwhile, the gathered non-woven material keeps the original shape, and the smoke is ensured to have a smooth channel. Because the suction resistance of the filter stick can be conveniently controlled by adjusting the thickness of the non-woven material, the linear density and the length of the fibers, the temperature of the cigarette smoke can be greatly reduced on the premise of reducing the adsorption and filtration of the cigarette smoke, no miscellaneous gas is brought to the smoke, and the experience of cigarette consumers is enhanced.

Drawings

Figure 1 is a schematic view of a two-stage aerosol-generating article configuration having a smoke temperature reducing unit according to an embodiment of the present invention.

Figure 2 is a schematic view of a three-stage aerosol-generating article configuration having a smoke temperature reduction unit according to an embodiment of the present invention.

Figure 3 is a schematic view of a four-stage aerosol-generating article configuration having a smoke temperature reduction unit according to an embodiment of the present invention.

Figure 4 is a schematic representation of a prior art four-stage aerosol-generating article structure (containing a reference sample of cellulose acetate tow).

Detailed Description

The present invention relates to an aerosol-generating article and associated method for rapidly reducing the temperature of cigarette smoke.

An aerosol-generating article is assembled from a plurality of units in the form of a rod composite. The plurality of units include an aerosol atomization unit and a unit for reducing the temperature of the flue gas located downstream of the aerosol atomization unit. The aerosol passing through the smoke cooling unit is cooled. The main body of the cooling unit is a structure formed by gathering non-woven materials, the void volume of the filter stick is the free space left after the space occupied by the non-woven materials, is the free space except for fibers, and comprises a closed void and a through type channel. Compared with the traditional acetate fiber filter stick, the temperature of the smoke aerosol passing through the non-woven filter stick is at least reduced by more than 2 ℃ compared with the temperature of the acetate fiber filter stick under the same measurement condition and the same suction resistance condition.

The aerosol has a relatively high temperature (greater than 100 ℃). By suction, through the nonwoven filter rod or the cooling unit inlet. The non-woven material filter stick comprises at least one through non-linear channel, and the cooling effect is achieved after smoke passes through the non-woven material filter stick. The nonlinear channels can be mutually staggered or mutually communicated to form a three-dimensional reticular channel, so that the aerosol can smoothly pass through, and high suction resistance or closed pressure drop is not generated at the same time. The through channel is generated in various modes, namely the mode provided by the invention can provide higher porosity and stronger mechanical strength and hardness through physical entanglement among fibers, and meets the requirements of subsequent processing and application.

Cooling is generally achieved by convection, conduction and radiation. Because the smoke temperature of the heating non-combustion cigarette is low, the heat exchange mainly transfers the heat of the smoke to the cooling section through convection, and the cooling section transfers the heat to the outer surface of the heat dissipation section in a conduction mode, thereby achieving the purpose of heat dissipation. In the traditional acetate fiber filter stick, the arrangement of tows in the filter stick is longitudinal arrangement, and air between the filaments has low heat conduction coefficient, so that heat energy is difficult to diffuse transversely. Resulting in a higher flue gas temperature after entry. The non-woven material has three-dimensional arrangement, and the fibers have a high heat conduction function, so that heat energy can be conducted and absorbed conveniently, and a better cooling effect is achieved.

The term "closed pressure drop" as used herein refers to the difference in static pressure between the two ends of the sample when the sample is passed through by an air stream under steady conditions at a volumetric flow rate of 17.5mL/s at the outlet end and when the sample is completely enclosed in the measuring device so that air cannot pass through the package. The occluded pressure drop has been measured herein according to CORESTA ("tobacco science research collaboration center") recommendation method 41, issued at 6 months 2007. A higher occluded pressure drop indicates that the smoker must use a greater force to smoke the smoking device.

The invention will be further described with reference to examples of embodiments shown in the drawings.

The following percentages (%) are by mass unless otherwise indicated.