A cigarette paper for microwave heating and a cigarette

Abstract

The application relates to the field of heating cigarettes, and discloses a cigarette paper for microwave heating and a cigarette, which comprises an outer cladding layer, a heating layer arranged on the surface of the outer cladding layer and used for absorbing microwaves and converting the microwaves into heat energy, and an isolation heat conduction layer arranged on the surface of the heating layer away from the surface of the outer cladding layer and used for conducting the heat energy generated by the heating layer to a smoking matrix, isolating the permeating substance generated by the smoking matrix, and isolating the materials of the heating layer and the smoking matrix. The cigarette paper comprises the outer cladding layer, the heating layer and the isolation heat conduction layer, wherein the outer cladding layer serves as a base, the heating layer can absorb the energy of microwaves and convert the microwave energy into heat energy, can generate heat rapidly, the isolation heat conduction layer can transfer the heat energy to the smoking matrix, heat the smoking matrix, heat the smoking matrix rapidly, improve the heating efficiency, and does not need to change other components of the cigarette, and the scheme is simple and good in effect. The isolation heat conduction layer can also isolate the permeating substance in the smoking matrix, so that the heating layer is prevented from being damaged by the permeating substance.

Description

Technical Field

[0001] This application relates to the field of heated cigarettes, and in particular to a cigarette paper and cigarette for microwave heating. Background Technology

[0002] Microwave heating is a heating method that relies on an object absorbing microwave energy and converting it into heat energy, thus raising its overall temperature. Heated cigarette products using microwave heating technology eliminate the need for heating needles / plates in the smoking device, resulting in advantages such as simple structure and ease of cleaning, representing a development trend in heated cigarette products.

[0003] Currently, the main components of reconstituted tobacco for heated cigarettes are tobacco powder, glycerin, and moisture. These components have limited microwave absorption efficiency, making them unsuitable for heating to above 300°C in a microwave environment. To overcome this deficiency, the reconstituted tobacco formula needs to be modified to make it easier for microwave heating. However, changing the reconstituted tobacco formula leads to changes in its rolling characteristics and the flavor of the heated cigarettes, hindering the stable development of product features.

[0004] Current cigarette paper typically includes an outer wrapping layer and an insulating layer. The outer wrapping layer is the outermost layer of the cigarette paper, while the insulating layer separates the cigarette paper from the tobacco material. Current cigarette paper lacks sufficient absorption and heating capacity for microwaves, making it difficult to rapidly heat the tobacco material in cigarettes to above 300°C. Therefore, current cigarette paper is not suitable for microwave heating.

[0005] Therefore, how to solve the above-mentioned technical problems should be a key focus for those skilled in the art. Summary of the Invention

[0006] The purpose of this application is to provide a cigarette paper and cigarette for microwave heating, so that the cigarette paper is suitable for microwave heating and can quickly heat the smoking matrix.

[0007] To solve the above-mentioned technical problems, this application provides a cigarette paper for microwave heating, comprising:

[0008] Outer layer;

[0009] A heating layer disposed on the surface of the outer cladding layer is used to absorb microwaves and convert microwaves into heat energy;

[0010] An insulating thermally conductive layer is provided on the surface of the heating layer away from the outer sheath, for conducting the heat energy generated by the heating layer to the smoke-generating matrix, isolating the permeable substances generated by the smoke-generating matrix, and isolating the heating layer material and the smoke-generating matrix.

[0011] As one possible implementation method, the microwave-heated cigarette paper also includes:

[0012] A heat insulation layer is disposed between the outer cladding layer and the heating layer.

[0013] As one possible implementation, in microwave-heated cigarette paper, the heat insulation layer is fixed to the surface of the outer wrapping layer by any one of spraying, pressing, or bonding.

[0014] As one possible implementation, in microwave-heated cigarette paper, the material of the heat insulation layer includes a solid material with a thermal conductivity of not more than 0.1 W / (m*k) and does not undergo property changes under conditions not exceeding 200°C.

[0015] As one possible implementation, in microwave-heated cigarette paper, the material of the heat insulation layer includes at least one of ceramic fiber, aluminum silicate fiber, and aerogel.

[0016] As one possible implementation, in microwave-heated cigarette paper, the shape of the heat-insulating layer material includes at least one of granular, sheet-like, strip-like, and flocculent forms.

[0017] As one possible implementation, in microwave-heated cigarette paper, the heating layer is fixed to the surface of the outer wrapping layer by any one of spraying, pressing, or bonding.

[0018] As one possible implementation, in microwave-heated cigarette paper, the material of the heating layer includes at least one of activated carbon and pyrolytic semi-coke powder; the pyrolytic semi-coke powder is a solid product obtained by pyrolysis of biomass materials.

[0019] In one possible implementation, the pyrolytic semi-char powder in microwave-heated cigarette paper is obtained from tobacco.

[0020] As one possible implementation, in microwave-heated cigarette paper, the material of the insulating heat-conducting layer includes a flexible material with a thermal conductivity of not less than 1 W / (m*k).

[0021] As one possible implementation, in microwave-heated cigarette paper, the material of the insulating heat-conducting layer includes at least one of cigarette paper, graphite paper, and aluminum foil.

[0022] As one possible implementation, in microwave-heated cigarette paper, the insulating heat-conducting layer is bonded and fixed to the heating layer on the surface away from the outer wrapping layer.

[0023] This application also provides a cigarette for microwave heating, comprising a smoke-generating matrix and any of the above-described cigarette paper for microwave heating;

[0024] The cigarette paper wraps around the smoking matrix, and the heat-conducting insulating layer in the cigarette paper is in direct contact with the smoking matrix.

[0025] This application provides a cigarette paper for microwave heating, comprising: an outer wrapping layer; a heating layer disposed on the surface of the outer wrapping layer for absorbing microwaves and converting microwaves into heat energy; and an insulating heat-conducting layer disposed on the heating layer away from the surface of the outer wrapping layer for conducting the heat energy generated by the heating layer to the smoking matrix and isolating the permeable substances generated by the smoking matrix, as well as isolating the heating layer material and the smoking matrix.

[0026] As can be seen, the cigarette paper of this application includes an outer wrapping layer, a heating layer, and an insulating and heat-conducting layer. The outer wrapping layer serves as the substrate. The carbon-based material in the heating layer can effectively absorb microwave energy and convert it into heat energy, enabling rapid heat generation. The insulating and heat-conducting layer transfers the heat energy to the smoking matrix, achieving rapid heating of the smoking matrix and improving heating efficiency. This solution is simple and effective, without requiring changes to other components of the cigarette. The insulating and heat-conducting layer also isolates permeable substances in the smoking matrix, preventing damage to the heating layer from these substances and preventing the heating layer material from mixing into the smoking matrix.

[0027] In addition, this application also provides a cigarette having the above-mentioned advantages. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application or the prior art, 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.

[0029] Figure 1 A schematic diagram of the structure of a cigarette paper for microwave heating provided in an embodiment of this application. Figure 1 ;

[0030] Figure 2 A schematic diagram of the structure of a cigarette paper for microwave heating provided in an embodiment of this application. Figure 2 ;

[0031] Figure 3 A schematic diagram of the structure of a cigarette for microwave heating provided in an embodiment of this application;

[0032] In the diagram, 1 is the outer layer, 2 is the heating layer, 3 is the heat-conducting and insulating layer, 4 is the thermal insulation layer, 100 is the cigarette paper, and 200 is the smoke-generating matrix. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some embodiments of the present application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0035] As described in the background section, current cigarette paper has insufficient absorption and heating capacity for microwaves, making it difficult to quickly heat the tobacco material in cigarettes to above 300°C. Therefore, current cigarette paper is not suitable for microwave heating.

[0036] In view of this, this application provides a cigarette paper for microwave heating, please refer to... Figure 1 ,include:

[0037] Outer layer 1;

[0038] The heating layer 2, disposed on the surface of the outer cladding layer 1, is used to absorb microwaves and convert microwaves into heat energy;

[0039] An insulating heat-conducting layer 3 is provided on the surface of the heating layer 2 away from the outer cladding layer 1. It is used to conduct the heat energy generated by the heating layer 2 to the smoke-generating matrix, isolate the permeating substances generated by the smoke-generating matrix, and prevent the material of the heating layer 2 from mixing into the smoke-generating matrix.

[0040] The outer layer 1 serves as a base, supporting the heating layer 2 and enabling the effective forming of the cigarette paper and the wrapping of the cigarette. The material of the outer layer 1 can be cigarette paper suitable for heated cigarettes.

[0041] The function of heating layer 2 is to absorb microwave energy and convert it into heat, which then heats the smoking substrate. Heating layer 2 can absorb the energy rapidly generated by microwaves, thereby achieving rapid heating of the smoking substrate. In this application, by improving the cigarette paper, the cigarette paper can effectively absorb microwaves and generate heat energy without changing the thin tobacco sheets used for microwave heating of cigarettes. This is very simple and effective.

[0042] The heating layer 2 can be made of carbon-based materials. It should be noted that this application does not specifically limit the material of the heating layer 2; it can be set arbitrarily. For example, the material of the heating layer 2 includes at least one of activated carbon and pyrolytic semi-coke powder. The pyrolytic semi-coke powder is a solid product obtained by pyrolyzing biomass materials. The biomass material can be carbon-containing organic matter, and the pyrolysis temperature can be between 600℃ and 800℃. The biomass material can be aromatic biomass raw materials such as tobacco (e.g., tobacco leaves, tobacco stems), tea, and coffee.

[0043] As one possible implementation, the heating layer 2 is fixed to the surface of the outer layer 1 by any one of spraying, pressing, or bonding.

[0044] When the heating layer 2 is fixed on the outer layer 1 by spraying, the selected material of the heating layer 2 is sprayed on the surface of the outer layer 1 to form a heating layer 2 of a certain thickness, thereby fixing the heating layer 2 on the outer layer 1.

[0045] When the heating layer 2 is fixed on the outer layer 1 in a pressing form, the selected material of the heating layer 2 can be laid flat on the outer layer 1, and then the material can be pressed to form the heating layer 2.

[0046] When the heating layer 2 is fixed to the outer layer 1 by adhesive bonding, an adhesive can be applied to the surface of the outer layer 1, and then the prepared heating layer 2 can be placed on the adhesive to achieve bonding with the outer layer 1.

[0047] The function of the heat-conducting insulating layer 3 includes two aspects. One aspect is heat conduction, which transfers the heat energy generated by the heating layer 2 to the smoke-generating matrix to heat the smoke-generating matrix. The other aspect is isolation. When the smoke-generating matrix is ​​heated, it will produce permeable substances, such as e-liquid. At the same time, the smoke-generating matrix also contains atomizing agents, which are also permeable substances. The heat-conducting insulating layer 3 can isolate these permeable substances to prevent the formation of "yellow-spot smoke" and prevent the heating material from being blown away and lost with the smoke.

[0048] The insulating thermal conductive layer 3 is made of a flexible material with a thermal conductivity of not less than 1 W / (m*k) to improve the flexibility of the cigarette paper, making it easier to wrap around the smoking matrix to form a cigarette. The insulating thermal conductive layer 3 is made of a material with high thermal conductivity and is impermeable to atomizing agents and e-liquid. For example, the insulating thermal conductive layer 3 includes, but is not limited to, at least one of cigarette paper, graphite paper, and aluminum foil paper.

[0049] In one possible embodiment of this application, the heat-conducting insulating layer 3 is bonded and fixed to the surface of the heating layer 2 away from the outer sheath 1 to improve the connection stability between the heat-conducting insulating layer 3 and the heating layer 2.

[0050] This embodiment of the cigarette paper includes an outer wrapping layer 1, a heating layer 2, and an insulating and heat-conducting layer 3. The outer wrapping layer 1 serves as the substrate. The carbon-based material in the heating layer 2 effectively absorbs microwave energy and converts it into heat energy, enabling rapid heat generation. The insulating and heat-conducting layer 3 transfers the heat energy to the smoking matrix, achieving rapid heating of the smoking matrix and improving heating efficiency. This solution is simple and effective without requiring changes to other components of the cigarette. The insulating and heat-conducting layer 3 also isolates permeable substances from the smoking matrix, preventing damage to the heating layer 2 and preventing the material of the heating layer 2 from mixing into the smoking matrix.

[0051] Please refer to Figure 2 Based on the above embodiments, in one embodiment of this application, the cigarette paper for microwave heating includes:

[0052] Outer layer 1;

[0053] A heat insulation layer is provided on the surface of the outer cladding layer 1;

[0054] The heating layer 2, located on the surface of the heat insulation layer opposite to the outer cladding layer 1, is used to absorb microwaves and convert microwaves into heat energy.

[0055] An insulating heat-conducting layer 3 is provided on the surface of the heating layer 2 away from the outer cladding layer 1. It is used to conduct the heat energy generated by the heating layer 2 to the smoke-generating matrix, isolate the permeating substances generated by the smoke-generating matrix, and prevent the material of the heating layer 2 from mixing into the smoke-generating matrix.

[0056] In this embodiment, a heat insulation layer is provided between the outer layer 1 and the heating layer 2. The heat insulation layer has the effect of heat insulation and can prevent the heat generated by the heating layer 2 from being lost to the outside of the rolled paper, so that more of the heat generated by the heating layer 2 can be transferred to the smoke-generating matrix, which can further improve the heating efficiency.

[0057] The thermal insulation layer is made of a solid material with a thermal conductivity not higher than 0.1 W / (m*k) and does not undergo property changes at temperatures not exceeding 200°C. The thermal insulation layer material can be a low thermal conductivity material. For example, the thermal insulation layer material includes, but is not limited to, at least one of ceramic fibers, aluminosilicate fibers, and aerogel.

[0058] It should be noted that the shape of the material of the thermal insulation layer is not limited in this application. For example, the shape of the material of the thermal insulation layer includes at least one of granular, sheet-like, strip-like, and flocculent forms.

[0059] The preferred shape of the thermal insulation layer material is flocculent. When the thermal insulation layer material is flocculent, the resulting thermal insulation layer 4 is relatively loose. In addition to the thermal insulation effect of the thermal insulation layer 4 material itself, the loose gaps also have a thermal insulation effect, which can enhance the thermal insulation effect of the thermal insulation layer 4.

[0060] The heat insulation layer can be fixed to the surface of the outer layer 1 by any one of the following methods: spraying, pressing, or bonding.

[0061] When the thermal insulation layer 4 is fixed to the outer layer 1 by spraying, the selected thermal insulation layer 4 material is sprayed onto the surface of the outer layer 1 to form a thermal insulation layer 4 of a certain thickness, thereby fixing the thermal insulation layer 4 to the outer layer 1.

[0062] When the thermal insulation layer 4 is fixed on the outer layer 1 in a pressed form, the selected thermal insulation layer 4 material can be laid flat on the outer layer 1, and then the material can be pressed to form the thermal insulation layer 4.

[0063] When the thermal insulation layer 4 is fixed to the outer layer 1 by adhesive bonding, an adhesive can be applied to the surface of the outer layer 1, and then the prepared thermal insulation layer 4 can be placed on the adhesive to achieve bonding with the outer layer 1.

[0064] This application also provides a cigarette for microwave heating, please refer to [reference needed]. Figure 3 It includes a smoke-generating matrix 200 and a cigarette paper 100 for microwave heating as described in any of the above embodiments;

[0065] The cigarette paper 100 is wrapped around the smoke-generating matrix 200, and the heat-conducting insulating layer in the cigarette paper 100 is in direct contact with the smoke-generating matrix 200.

[0066] Microwaves are used to heat cigarettes. The heating layer in the cigarette paper 100 absorbs the microwaves and converts them into heat energy. The heat energy is transferred to the smoke-generating matrix 200 through the heat-conducting insulating layer. The smoke-generating matrix 200 is heated and emits smoke when it reaches a certain temperature.

[0067] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0068] The above provides a detailed description of the cigarette paper and cigarettes for microwave heating provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A type of cigarette paper for microwave heating, characterized in that, include: Outer layer; A heat insulation layer is provided on the surface of the outer cladding layer; A heating layer is disposed on the heat insulation layer away from the surface of the outer cladding layer, for absorbing microwaves and converting microwaves into heat energy; the material of the heating layer includes pyrolytic semi-coke powder; the pyrolytic semi-coke powder is a solid product obtained by pyrolysis of biomass materials, and the pyrolytic semi-coke powder is obtained from tobacco. An insulating thermally conductive layer is disposed on the heating layer away from the surface of the outer sheath, for conducting the heat energy generated by the heating layer to the smoking matrix, isolating the permeable substances generated by the smoking matrix, and isolating the heating layer material and the smoking matrix; the material of the insulating thermally conductive layer includes a flexible material with a thermal conductivity of not less than 1 W / (m*k); the material of the insulating thermally conductive layer includes at least one of graphite paper and aluminum foil paper.

2. The cigarette paper for microwave heating as described in claim 1, characterized in that, The heat insulation layer is fixed to the surface of the outer layer by any one of the following methods: spraying, pressing, or bonding.

3. The cigarette paper for microwave heating as described in claim 1, characterized in that, The material of the thermal insulation layer includes a solid material with a thermal conductivity of not more than 0.1 W / (m*k) and does not undergo property changes under conditions not exceeding 200°C.

4. The cigarette paper for microwave heating as described in claim 3, characterized in that, The material of the thermal insulation layer includes at least one of ceramic fiber and aerogel.

5. The cigarette paper for microwave heating as described in claim 3, characterized in that, The material of the heat insulation layer includes at least one of the following shapes: granular, flake, strip, and flocculent.

6. The cigarette paper for microwave heating as described in any one of claims 1 to 5, characterized in that, The insulating and heat-conducting layer is bonded and fixed to the surface of the heating layer away from the outer sheath.

7. A cigarette for microwave heating, characterized in that, Includes a smoke-generating matrix and cigarette paper for microwave heating as described in any one of claims 1 to 6; The cigarette paper wraps around the smoking matrix, and the heat-conducting insulating layer in the cigarette paper is in direct contact with the smoking matrix.

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