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 曹智祥 沈晶晶 丁佳柱 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相变功能的滤棒,滤棒中包含可供卷烟烟气通过的间隙。所述具有相变功能的滤棒是由无纺材料制成。滤棒包括无纺材料及包裹材料；无纺材料经过折叠后形成圆柱状,包裹材料包裹在外从而形成圆柱结构的滤棒。所述无纺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无纺材料。本发明可用于加热不燃烧卷烟中。本发明具有降低卷烟烟气温度、并对卷烟烟气中有效成分具有较低吸附率的功能。通过调整无纺材料含量和厚度,可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 a phase change function, and the filter stick comprises a gap through which cigarette smoke can pass. The filter stick with the phase change function is made of non-woven materials. 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. The non-woven material can reduce the temperature of cigarette smoke and has low adsorption rate to effective components in the cigarette smoke. The invention can be used for heating non-combustible cigarettes. The invention has the functions of reducing the temperature of the cigarette smoke and having lower adsorption rate to the effective components in the cigarette smoke. By adjusting the content and the thickness of the non-woven material, the suction resistance of the filter stick can be conveniently controlled, the temperature of the cigarette smoke can be quickly and greatly reduced under the condition of reducing the adsorption and filtration of the cigarette smoke, and the smoke is not polluted.)

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 a phase change function, and the filter stick comprises a gap through which cigarette smoke can pass.

2. An aerosol-generating structure according to claim 1, wherein: the filter stick with the phase change function 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 nonwoven 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 single fibers or multi-component fibers; at least one of them is a fiber having a phase change function; the fibers comprise cellulose diacetate fibers, and the fibers with the phase change function are PLA fibers, PE fibers, polyester fibers, polyamide fibers and base fibers containing phase change materials.

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

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

11. 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.

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

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

14. An aerosol-generating structure according to claim 8, wherein: the base fiber containing the phase-change material has the functions of absorbing, storing and releasing heat in a latent heat mode, and can be converted into a solid state and a liquid state in temperature change, so that the effects of absorbing and releasing heat are achieved.

15. An aerosol-generating structure according to claim 8, wherein: the basic fiber containing the phase-change material is prepared by organically combining the phase-change material and the basic fiber through a composite spinning method, a hollow fiber filling method and a microcapsule coating method spinning technology.

16. An aerosol-generating structure according to claim 8, wherein: according to the mass percentage, the mass of the phase change material is 15-70% of the base fiber containing the phase change material.

17. An aerosol-generating structure according to claim 8, wherein: the phase change material is a substance which changes the state of a substance and can provide latent heat under the condition of constant temperature, and comprises an inorganic phase change material and an organic phase change material.

18. An aerosol-generating structure according to claim 15, wherein: the inorganic phase-change material comprises MgCl₂·6H₂O、CaCl₂·6H₂O、Na₂SO₄·10H₂O、Na₂HPO₄·12H₂O。

19. An aerosol-generating structure according to claim 15, wherein: the organic phase-change material comprises organic acid esters, polyhydric alcohols, higher alkanes and organic esters.

20. An aerosol-generating structure according to claim 15, wherein: the organic phase change material comprises paraffin, polyethylene glycol, stearic acid-stearyl ester, trimethylolethane and neopentyl glycol.

21. An aerosol-generating structure according to claim 15, wherein: the basic fiber comprises cotton, polyester cotton, wool, polypropylene fiber, acrylic fiber, cellulose fiber, polyester fiber, polyurethane fiber and polylactic acid fiber.

22. 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.

23. 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.

24. An aerosol-generating structure according to claim 1 or 23, 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.

25. A method of producing an aerosol-generating structure according to claim 23 or 24, wherein: the filter stick is an acetate fiber filter stick; the hollow pipe part is an acetate fiber hollow filter tip.

26. A method of making an aerosol-generating structure according to any of claims 1 to 25, wherein: and cutting the smoke cooling unit to a fixed length and then combining the cut smoke cooling unit with other components.

27. A method of producing an aerosol-generating structure according to claim 26, wherein:

the preparation of the filter stick with the phase change function in the smoke cooling unit comprises the following steps: the method comprises the following steps of extracting a non-woven material, leveling the air flow of the non-woven material, clamping and conveying the non-woven material by a pair of rollers, drafting the non-woven material by a pair of rollers through threads, 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 cutting a non-woven material filter stick to.

28. Use of an aerosol-generating structure according to any of claims 1 to 25 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, CN101778578A, CN103889254A, 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 literature and patent reports are found for using mixed non-woven materials as materials of temperature reduction sections in 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 comprising an aerosol atomizing unit and a flue gas cooling unit; the cooling structure in the smoke cooling unit comprises a filter stick with a phase change function, and the filter stick comprises a gap through which cigarette smoke can pass.

Further, the filter stick with the phase change function 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; the nonwoven material has pores inside the fibers and between the fibers.

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

Optionally, the nonwoven material is a blend of single fibers or multiple components; at least one of them is a fiber having a phase change function; the fibers comprise cellulose diacetate fibers, and the fibers with the phase change function comprise PLA fibers, PE fibers, polyester fibers, polyamide fibers and base fibers containing phase change materials. Wherein, the PLA fiber, the PE fiber, the polyester fiber and the polyamide fiber have phase change function in a certain temperature range.

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.

The base fiber containing the phase-change material has the functions of absorbing, storing and releasing heat in a latent heat mode, and can be converted into a solid state and a liquid state in temperature change, so that the effects of absorbing and releasing heat are achieved. The phase change is represented by three-state change of gas, solid and liquid, physical processes such as crystallization, crystal form transformation to hydrocarbon and crystal melting, and the like, and is accompanied by the change of molecular aggregation state structure, and the temperature is not changed in the process but accompanied by the release or absorption of heat, so the phase change has the function of regulating the temperature. The "base fiber containing a phase change material" is a part of the "fiber having a phase change function", and the fiber having a phase change function also includes PLA fiber, PE fiber, polyester fiber, polyamide fiber, and the like which can be produced by a melt spinning method.

The basic fiber containing the phase-change material is prepared by organically combining the phase-change material with common fiber through a composite spinning method, a hollow fiber filling method and a microcapsule coating method spinning technology. The specific preparation method is the same as that described in the following documents: majunzhi, lechtang, "development and application of viscose-based energy-storage and temperature-adjustment fibers" [ J ], knitting raw material, 2012 (12): 22-23).

The 'fiber having a phase change function' includes a base fiber containing a phase change material and a corresponding fiber prepared by a melt spinning method.

Optionally, the phase change material is included in an amount of 15% to 70% by mass of the base fiber containing the phase change material.

Alternatively, the phase change material refers to a substance which changes the state of the substance under the condition of constant temperature and can provide latent heat, and includes inorganic phase change materials and organic phase change materials.

Optionally, the inorganic phase change material comprises MgCl₂·6H₂O、CaCl₂·6H₂O、Na₂SO₄·10H₂O、Na₂HPO₄·12H₂O, and the like.

Optionally, the organic phase change material includes organic acid esters, polyols, higher alkanes, organic esters, and the like.

Optionally, the organic phase change material includes paraffin, polyethylene glycol, stearic acid-stearyl ester, trimethylolethane, neopentyl glycol, and the like.

Alternatively, the common fibers include cotton, polyester cotton, wool, polypropylene, acrylic, cellulose fibers, polyester fibers, polyurethane fibers, polylactic acid fibers, and the like.

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 aerosol-generating structure described above finds application in cigarettes and cigarettes that do not burn when heated.

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.

Further, the preparation method of the filter stick with the phase change function in the smoke cooling unit comprises the following steps: extracting the composite non-woven material, leveling the composite non-woven material by air flow, clamping and conveying the composite non-woven material by a pair of rollers, drafting the composite non-woven material by a pair of rollers through threads, applying a plasticizer and a cooling agent, retracting and finishing the composite non-woven material, conveying the composite non-woven material by a high-pressure nozzle, wrapping the composite acetate fiber non-woven material by forming paper, and slitting the composite non-woven material filter stick 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 formed by aggregating non-woven materials formed by mixing single fibers or multi-component fibers, wherein at least one fiber has a phase change function. When the smoke sol passes through the cooling unit, the functional fiber with phase change generates phase change heat absorption, 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, and the free space is free space except fibers and comprises closed voids and a through type channel. Compared with the traditional acetate fiber filter stick, the temperature of the smoke aerosol passing through the non-woven material 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 inlet of the cooling unit. 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 phase change function, so that heat energy can be absorbed conveniently, and the non-woven material has a better cooling effect.

The functional fiber with the phase-change material can effectively reduce the temperature of the smoke. The phase-change material refers to a small molecule or a high molecular material which has a phase-change function in a certain temperature range, wherein the phase-change function comprises the melting of a crystalline material. Melting of the crystals is generally accompanied by an endothermic phenomenon. The small molecule phase change material comprises paraffin and the like. The high-molecular phase-change material comprises polyethylene, PLA, PEG and HPMC/PEG blend. When the cigarette is heated and used without burning, the tobacco is heated at a temperature of 200 to 400 ℃, nicotine is released, and fewer harmful substances are generated compared with the traditional cigarette. The cooling section should therefore reduce nicotine filtration little or no.

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.