Thin shredded tobacco available for microwave heating and preparation method therefor

Abstract

A preparation method for thin shredded tobacco available for microwave heating, comprising: obtaining shredded tobacco heating additive materials from a tobacco raw material, wherein the shredded tobacco heating additive materials comprise tobacco semicoke powder; well mixing the shredded tobacco heating additive materials and tobacco powder to obtain a mixture; adding preparation auxiliary materials into the mixture, and well mixing the preparation auxiliary materials and the mixture to obtain a prefabricated mixture of thin shredded tobacco; and drying and shaping the prefabricated mixture to obtain the thin shredded tobacco. The tobacco semicoke powder is a carbide and has a good microwave absorption capacity. By adding the tobacco semicoke powder into the thin shredded tobacco, when the thin shredded tobacco is heated using microwaves, the thin shredded tobacco can better absorb the microwaves, so that the thin shredded tobacco reaches a high heating rate, and then the thin shredded tobacco is well heated and vapor is fully released; moreover, the tobacco semicoke powder is obtained from the tobacco raw material, and thus will not influence the flavor and safety of the thin shredded tobacco. Also provided is thin shredded tobacco prepared using the preparation method.

Description

A sheet cut tobacco for microwave heating and a preparation method thereof

[0001] This application claims priority to Chinese Patent Application No. CN202410413865.4, filed on April 8, 2024, the contents of which are incorporated herein in their entirety by reference. TECHNICAL FIELD

[0002] The present application relates to the field of cigarettes, in particular to a sheet cut tobacco for microwave heating and a preparation method thereof. BACKGROUND

[0003] Microwave heating is a heating method for heating cigarettes. Microwaves can penetrate the sheet cut tobacco and cause the molecules inside the sheet cut tobacco to absorb microwave energy and generate heat, thereby achieving the effect of uniform heating. Currently, the sheet cut tobacco is made of tobacco powder, glycerol, water, and auxiliary materials such as binders. The absorption efficiency of tobacco powder for microwaves is low, and the water and other easily heated components will quickly release and lose after being heated and vaporized. Therefore, it is difficult to achieve good heating (300°C) and smoke release under the microwave heating conditions of a heating cigarette special device.

[0004] Therefore, how to solve the above technical problems should be the focus of attention of those skilled in the art. SUMMARY

[0005] The purpose of the present application is to provide a sheet cut tobacco for microwave heating and a preparation method thereof, so that the sheet cut tobacco can achieve good heating and smoke release when heated by microwaves.

[0006] To solve the above technical problems, the present application provides a preparation method of a sheet cut tobacco for microwave heating, comprising:

[0007] obtaining a tobacco cut heating additive material from tobacco raw materials, wherein the tobacco cut heating additive material comprises tobacco semi-coke powder;

[0008] mixing the tobacco cut heating additive material and tobacco powder uniformly to obtain a mixture;

[0009] adding preparation auxiliary materials to the mixture and mixing uniformly to obtain a pre-prepared mixture of the sheet cut tobacco;

[0010] drying and shaping the pre-prepared mixture to obtain the sheet cut tobacco.

[0011] Optionally, the tobacco cut heating additive material further comprises flavoring ingredients and / or heating aids; the heating aids are microwave heating materials that are not derived from tobacco.

[0012] Optionally, the tobacco cut heating additive material is obtained from tobacco raw materials, and comprises tobacco semi-coke powder and flavoring ingredients, comprising:

[0013] drying and crushing the tobacco raw material to obtain the tobacco powder;

[0014] pyrolyzing the tobacco powder to obtain the tobacco semi-coke powder and the aroma component.

[0015] Optionally, the pyrolyzing the tobacco powder comprises:

[0016] heating the tobacco powder in an inert atmosphere environment, wherein the final temperature of the heating ranges from 400℃ to 800℃, and the heating rate ranges from 20℃ / min to 200℃ / min;

[0017] holding the final temperature for 5min to 20min after the heating.

[0018] Optionally, the mesh number of the tobacco powder ranges from 50 mesh to 300 mesh.

[0019] Optionally, in the mixture, the mass percentage of the tobacco semi-coke powder ranges from 30% to 65%, the mass percentage of the aroma component ranges from 5% to 35%, and the mass percentage of the tobacco powder ranges from 0% to 65%.

[0020] Optionally, adding the preparation auxiliary to the mixture and mixing uniformly to obtain the pre-mixed mixture of the sheet tobacco comprises:

[0021] adding the preparation auxiliary to the mixture and mixing uniformly to obtain the pre-mixed mixture of the sheet tobacco, wherein the preparation auxiliary comprises atomizing agent, binder, fiber material, water and heating aid.

[0022] Optionally, in the preparation auxiliary, the mass percentage of the atomizing agent ranges from 30% to 45%, the mass percentage of the binder ranges from 3% to 5%, the mass percentage of the fiber material ranges from 3% to 5%, the mass percentage of the heating aid ranges from 0% to 5%, and the mass percentage of the water ranges from 40% to 64%.

[0023] Optionally, before adding the preparation auxiliary to the mixture and mixing uniformly, further comprising:

[0024] adding tobacco flavor to the mixture;

[0025] correspondingly, adding the preparation auxiliary to the mixture and mixing uniformly comprises:

[0026] adding the preparation auxiliary to the mixture with the tobacco flavor and mixing uniformly.

[0027] The application further provides the cut tobacco prepared by the method.

[0028] The application provides a method for preparing cut tobacco for microwave heating, comprising the following steps: obtaining tobacco heating additive from tobacco raw materials, wherein the tobacco heating additive comprises tobacco semi-coke powder; mixing the tobacco heating additive and tobacco powder uniformly to obtain a mixture; adding preparation accessories to the mixture and mixing uniformly to obtain a pre-preparation mixture of cut tobacco; drying and shaping the pre-preparation mixture to obtain cut tobacco.

[0029] It can be seen that, in the application, the tobacco heating additive is obtained from tobacco raw materials, and then the tobacco heating additive, tobacco powder and preparation accessories are made into cut tobacco. Since the tobacco heating additive comprises tobacco semi-coke powder, i.e. the cut tobacco comprises tobacco semi-coke powder, the tobacco semi-coke powder is a carbide and has good microwave absorption capacity, which helps the cut tobacco to absorb microwaves when the cut tobacco is heated by microwaves, so that the cut tobacco can reach a faster heating rate, and thus the cut tobacco can realize good heating and smoke release. Moreover, the tobacco semi-coke powder is obtained from tobacco raw materials, which does not affect the flavor and safety of the cut tobacco.

[0030] In addition, the application further provides cut tobacco with the above advantages. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0032] Fig. 1 is a flow chart of a method for preparing cut tobacco for microwave heating according to an embodiment of the application;

[0033] Fig. 2 is a flow chart of a method for preparing cut tobacco for microwave heating according to an embodiment of the application;

[0034] Fig. 3 is a flow chart of a method for preparing cut tobacco for microwave heating according to an embodiment of the application;

[0035] Fig. 4 is a process flow chart of a method for preparing cut tobacco for microwave heating according to an embodiment of the application. DETAILED DESCRIPTION

[0036] For the person skilled in the art to better understand the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.

[0037] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced without the specific details, which are not described in the present application, and it can be apparent to those skilled in the art that the present application can be implemented in other ways different from those described in the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0038] As described in the background section, the sheet tobacco is made of tobacco powder, glycerol, water and auxiliary materials such as binders, the absorption efficiency of the tobacco powder to microwaves is low, and the water and other easily heated components will be quickly released after being heated and vaporized, so it is difficult to achieve good heating and smoke release under the microwave heating conditions of the heating cigarette special device.

[0039] Therefore, the present application provides a preparation method of sheet tobacco for microwave heating, as shown in FIG. 1, the method comprises:

[0040] Step S101: obtaining tobacco heating additive material from tobacco raw material, the tobacco heating additive material comprises tobacco semi-coke powder.

[0041] The tobacco raw material refers to a raw material containing tobacco components, and the tobacco raw material can be tobacco leaves and / or tobacco stems.

[0042] As an implementable manner, the tobacco heating additive material obtained from the tobacco raw material comprises tobacco semi-coke powder, which comprises:

[0043] The tobacco raw material is dried and crushed to obtain the tobacco powder;

[0044] The tobacco powder is subjected to thermal cracking treatment, and the remaining solid is the tobacco semi-coke powder.

[0045] The tobacco semi-coke powder has microwave heating performance, and the microwave heating capacity is much higher than that of the tobacco powder under the same conditions.

[0046] In an embodiment of the present application, the tobacco heating additive material can further include an aroma-generating component and / or a heating aid; the heating aid is a non-tobacco source microwave heating material. That is, the tobacco heating additive material can include tobacco semi-coke powder and an aroma-generating component; or, the tobacco heating additive material can include tobacco semi-coke powder and a heating aid; or, the tobacco heating additive material can include tobacco semi-coke powder, an aroma-generating component and a heating aid. Step S102: uniformly mixing the tobacco heating additive material and the tobacco powder to obtain a mixture.

[0047] Step S103: adding a preparation aid to the mixture and uniformly mixing to obtain a pre-mixed mixture of the flake tobacco.

[0048] As an implementable manner, adding a preparation aid to the mixture and uniformly mixing to obtain a pre-mixed mixture of the flake tobacco includes:

[0049] Adding a preparation aid to the mixture and uniformly mixing to obtain a pre-mixed mixture of the flake tobacco; the preparation aid includes an atomizing agent, a binding agent, a fibrous material, water and a heating aid.

[0050] The atomizing agent includes, but is not limited to, any one or more of glycerol, propylene glycol.

[0051] The binding agent includes, but is not limited to, any one or more of sodium alginate, sodium carboxymethyl cellulose, chitosan, guar gum, locust bean gum, cellulose acetate.

[0052] The fibrous material includes, but is not limited to, any one or more of softwood high-yield pulp, softwood kraft pulp, softwood bleached kraft pulp.

[0053] The heating aid functions to enhance microwave heating, and includes, but is not limited to, any one or more of activated carbon, potassium carbonate, calcium chloride, ferrous sulfate.

[0054] In the preparation aid, the mass percentage of the atomizing agent ranges from 30% to 45%, the mass percentage of the binding agent ranges from 3% to 5%, the mass percentage of the fibrous material ranges from 3% to 5%, the mass percentage of the heating aid ranges from 0% to 5%, and the mass percentage of the water ranges from 40% to 64%.

[0055] Step S104: drying and shaping the pre-mixed mixture to obtain the flake tobacco.

[0056] The specific operation in this step can refer to related technologies, which will not be described in detail here.

[0057] The microwave heating frequency range can be 300MHz-300GHz, and preferably, the heating frequency is 915MHz, 2450MHz or 5800MHz. The microwave heating power is 10W-20W.

[0058] In the preparation of the cut tobacco in the embodiment, the tobacco heating additive is obtained from the tobacco raw material, and then the tobacco heating additive, the tobacco powder and the preparation auxiliary are used to prepare the cut tobacco. Since the tobacco heating additive includes the tobacco semi-coke powder, i.e., the cut tobacco includes the tobacco semi-coke powder, the tobacco semi-coke powder is a carbide and has good microwave absorption capacity, which helps the cut tobacco to absorb the microwave when the cut tobacco is heated by the microwave, so that the cut tobacco can reach a faster heating rate, and thus the cut tobacco can achieve good heating and smoke release. Moreover, the tobacco semi-coke powder is obtained from the tobacco raw material, and thus will not affect the flavor and safety of the cut tobacco.

[0059] Referring to FIG. 2, on the basis of the above embodiment, in one embodiment of the present application, the preparation method of the cut tobacco for microwave heating includes:

[0060] Step S201: obtaining a tobacco heating additive from a tobacco raw material, wherein the tobacco heating additive includes tobacco semi-coke powder and aroma components.

[0061] As an implementable manner, the tobacco heating additive is obtained from the tobacco raw material, and the tobacco heating additive includes the tobacco semi-coke powder and the aroma components, which includes:

[0062] Step S2011: drying and crushing the tobacco raw material to obtain the tobacco powder.

[0063] The mesh number of the tobacco powder can be 50-300 meshes, including the end values. On the one hand, it avoids that the tobacco powder particles are too large to be formed into the cut tobacco; on the other hand, it avoids that the tobacco powder particles are too small to require more fine crushing, which leads to high production cost.

[0064] Step S2012: pyrolyzing the tobacco powder to obtain the tobacco semi-coke powder, and condensing and collecting the volatile components generated in the pyrolysis process to obtain the aroma components.

[0065] The pyrolysis of the tobacco powder includes:

[0066] The tobacco powder is heated in an inert atmosphere, and the final heating temperature is 400-800℃, and the heating rate is 20-200℃ / min.

[0067] After heating to the final temperature, keep constant temperature for 5-20 minutes.

[0068] The inert atmosphere environment refers to an environment with an oxygen content of less than 4%, and the gas in the environment can be nitrogen, helium, or other inert gases. The volatile components have a residence time of less than 10 seconds at the final temperature and a residence time of more than 30 seconds in the condensation stage.

[0069] When the final heating temperature is in the range of 400-800℃, the obtained tobacco semi-coke powder has good microwave heating performance. The final heating temperature can be 400℃, 500℃, 600℃, 700℃, 800℃, etc. The heating rate can be 20℃ / min, 50℃ / min, 80℃ / min, 100℃ / min, 150℃ / min, 180℃ / min, 200℃ / min, etc. The constant temperature time of the final heating temperature can be 5min, 10min, 15min, 20min, etc. The application does not make specific limitations.

[0070] The final heating temperature is preferably in the range of 600-750℃, including the end point values. On the one hand, it makes the carbonization temperature of the generated tobacco semi-coke powder high, which is convenient for absorbing microwave heating. On the other hand, it generates more volatile components, thereby obtaining more aroma components.

[0071] The condensation temperature range can be -5℃-15℃, including the end point values, in order to facilitate the collection of aroma components.

[0072] Step S202: uniformly mix the heating additive, tobacco powder, and tobacco semi-coke powder to obtain a mixture.

[0073] The mixture in this step includes tobacco powder, tobacco semi-coke powder, and aroma components. As an implementable manner, the mass percentage of the tobacco semi-coke powder can be in the range of 30%-65%, the mass percentage of the aroma components can be in the range of 5%-35%, and the mass percentage of the tobacco powder can be in the range of 0%-65%, including all end point values.

[0074] The reason why the mass percentage of the tobacco semi-coke powder is more than 30% is that when the mass percentage reaches 30% or more, the microwave heating of the tobacco semi-coke powder can achieve a faster heating rate to meet the requirement of quickly reaching about 300-350℃ under the conditions of cigarette smoking.

[0075] Step S203: add a preparation auxiliary material to the mixture and mix uniformly to obtain a pre-prepared mixture of flaky tobacco.

[0076] The preparation auxiliary material includes atomizing agent, binder, fiber material, water, and heating aid.

[0077] The mixture of the tobacco powder, the tobacco semi-coke powder and the flavoring ingredient (also referred to as tobacco ingredient material) and the preparation auxiliary material are in a mass percentage ratio of 1: (1-2).

[0078] Step S204: drying and shaping the pre-prepared mixture to obtain the cut tobacco.

[0079] In the embodiment, the flavoring ingredient is added to the cut tobacco, which can compensate for the decrease in the smoke release amount of the cut tobacco due to the addition of the microwave heating aid (tobacco semi-coke powder) which does not release flavoring ingredients, and enhance the tobacco flavor of the cut tobacco. Moreover, the flavoring ingredient is directly derived from the thermal cracking of the tobacco raw material in the process of preparing the tobacco semi-coke powder, and has the same smoke as the cut tobacco, without affecting the quality of the cut tobacco.

[0080] Referring to FIG. 3, in one embodiment of the present application, the method for preparing the cut tobacco for microwave heating comprises the following steps:

[0081] Step S301: obtaining a tobacco heating additive material from tobacco raw material, wherein the tobacco heating additive material comprises tobacco semi-coke powder and flavoring ingredients.

[0082] Step S302: mixing the tobacco heating additive material and the tobacco powder to obtain a mixture.

[0083] Step S303: adding tobacco flavor to the mixture.

[0084] The tobacco flavor can be a fruit flavor or a mint flavor, for example, the fruit flavor can be sweet orange essence, pineapple essence, watermelon essence, honey peach essence, etc.

[0085] The mass percentage of the tobacco flavor can be in the range of 0-5%.

[0086] Step S304: adding a preparation auxiliary material to the mixture with the tobacco flavor and mixing to obtain a pre-prepared mixture of the cut tobacco.

[0087] Step S305: drying and shaping the pre-prepared mixture to obtain the cut tobacco.

[0088] In the embodiment, the addition of the tobacco flavor can release corresponding flavors during the heating process of the cut tobacco, improving the taste of smoking.

[0089] Referring to FIG. 4, the preparation process of the cut tobacco in the present application will be described in detail.

[0090] Step 1: drying and crushing 100 g of tobacco raw material to obtain tobacco powder.

[0091] Step 2, the tobacco powder is subjected to pyrolysis treatment, the heating rate is 20℃ / min, the final temperature is 600℃, the reaction atmosphere is 100% nitrogen, and the temperature is kept constant for 10 min after being heated to 600℃. By adjusting the nitrogen flow rate and the condenser capacity, the volatile components are kept in the pyrolysis zone for 5 s and in the condensation zone for 40 s, and the condensation temperature is 0℃, thereby obtaining 24.1 g of tobacco semi-coke powder and 46.9 g of aroma components.

[0092] Step 3, 30 g of tobacco semi-coke powder, 15 g of aroma components, and 55 g of tobacco powder are thoroughly mixed to obtain a mixture.

[0093] Step 4, the mixture is mixed with 40 g of glycerol, 4 g of sodium carboxymethyl cellulose, 4 g of coniferous wood high-yield pulp fiber, and 52 g of water to obtain a pre-mixture of sheet tobacco.

[0094] Step 5, the pre-mixture of sheet tobacco is prepared into sheet tobacco by roller pressing.

[0095] The application also provides a sheet tobacco prepared by the method described in any of the above embodiments.

[0096] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts of each embodiment can be referred to each other.

[0097] The sheet tobacco for microwave heating and the preparation method thereof provided by the application are described in detail above. The principles and implementation manners of the application are described by applying specific examples, and the above embodiment descriptions are only used to help understand the method and core idea of the application. It should be noted that, for those skilled in the art, without departing from the principles of the application, some improvements and modifications can be made to the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

Claims

1. A method for preparing thin tobacco slices for microwave heating, characterized in that: include: Obtaining a tobacco heating additive material from tobacco raw material, wherein the tobacco heating additive material includes tobacco semi-coke powder; and uniformly mixing the tobacco heating additive material and tobacco powder to obtain a mixture; Adding preparation auxiliary materials to the mixture and mixing them evenly to obtain a prefabricated mixture of thin tobacco sheets; The prefabricated mixture is dried and shaped to obtain thin tobacco sheets.

2. The method for preparing thin tobacco slices according to claim 1, wherein: The tobacco heating additive further comprises a flavoring component and / or a heating aid; the heating aid is a microwave heating material of a non-tobacco source.

3. The method for preparing thin tobacco slices according to claim 2, wherein: The tobacco heating additive material is obtained from tobacco raw materials, and the tobacco heating additive material includes tobacco semi-coke powder and aroma components, including: Drying and pulverizing the tobacco raw material to obtain the tobacco powder; The tobacco powder is subjected to thermal cracking treatment, and the solid remaining from the thermal cracking treatment is the tobacco semi-coke powder. The volatile matter generated during the thermal cracking treatment is condensed and collected to obtain the aroma component.

4. The method for preparing thin tobacco slices according to claim 3, wherein: The step of thermally cracking the tobacco powder comprises: The tobacco powder is subjected to a heating treatment in an inert atmosphere; wherein the final heating temperature ranges from 400° C. to 800° C., and the heating rate ranges from 20° C. / min to 200° C. / min; After heating to the final temperature, keep the temperature constant for 5 to 20 minutes.

5. The method for preparing thin tobacco slices according to claim 3, wherein: The mesh size of the tobacco powder ranges from 50 mesh to 300 mesh.

6. The method for preparing thin tobacco slices according to claim 3, wherein: In the mixture, the mass percentage of the tobacco semi-coke powder ranges from 30% to 65%, the mass percentage of the aroma component ranges from 5% to 35%, and the mass percentage of the tobacco powder ranges from 0% to 65%.

7. The method for preparing thin tobacco slices according to claim 1, wherein: Adding auxiliary materials to the mixture and mixing them uniformly to obtain a prefabricated mixture of thin tobacco sheets includes: Adding preparation auxiliary materials to the mixture and mixing them evenly to obtain a prefabricated mixture of thin tobacco slices; the preparation auxiliary materials include an atomizer, a binder, fiber, water and a heating aid.

8. The method for preparing thin tobacco slices according to claim 7, wherein: In the preparation auxiliary materials, the mass percentage of the atomizer ranges from 30% to 45%, the mass percentage of the binder ranges from 3% to 5%, the mass percentage of the fiber material ranges from 3% to 5%, the mass percentage of the heating aid ranges from 0% to 5%, and the mass percentage of water ranges from 40% to 64%.

9. The method for preparing thin tobacco according to any one of claims 1 to 8, characterized in that: Before adding the preparation auxiliary materials to the mixture and mixing them uniformly, the method further comprises: Adding tobacco flavoring to the mixture; correspondingly, adding preparation auxiliary materials to the mixture and mixing them uniformly includes: Add the prepared auxiliary materials into the mixture with the tobacco flavoring and mix well.

10. A thin tobacco sheet, characterized in that: The thin tobacco shreds are prepared by the method for preparing thin tobacco shreds according to any one of claims 1 to 9.

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