Cigarette wrapping material and heating cigarette

Abstract

According to the cigarette wrapping material and the heating cigarette provided by the invention, the cigarette wrapping material is formed by compounding a single thermosensitive structural layer or multiple thermosensitive structural layers, the cigarette wrapping material serving as the wrapping material for heating a cigarette core is used in the heating cigarette, and the opening and closing states of the air holes of the cigarette core section can be changed according to the temperature change. When the cigarette is not heated, the temperature is low, the air holes are in a closed state, moisture entering the environment can be reduced, tobacco shreds can be kept dry, and moisture absorption of the cigarette is slowed down; during heating, the temperature rises, the air holes are opened, convection between the cigarette and the surrounding environment is increased, and heat dissipation of the cigarette and reduction of suction resistance are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of heated cigarettes, and in particular to a cigarette wrapping material and a heated cigarette. Background Art

[0002] Since the tobacco segments of heated cigarettes are wrapped in the cavity of the heating device, there is no effective airflow entering, which will lead to problems such as high temperature at the outlet of the smoke, large inhalation resistance, and small smoke volume. Figure 1 As shown, the current method of introducing airflow is to make holes in the device and introduce airflow through the air path at the end of the device. In addition, holes are punched at the end of the filter rod to increase the amount of air entering, which has the effect of lowering the temperature and reducing the resistance to inhalation. However, although the method of introducing airflow by punching holes in the filter rod can increase the amount of smoke and lower the smoke temperature, it will dilute the smoke and reduce the satisfaction of smoking. If holes are punched directly in the tobacco core section, the tobacco will be more likely to absorb moisture. When the water content of the tobacco increases, a large amount of water vapor condenses during inhalation, releasing a large amount of heat, causing the smoke temperature to rise and the smoking experience to decrease.

[0003] How to lower the temperature and reduce the inhalation resistance while satisfying the smoking experience is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a cigarette wrapping material and a heated cigarette. The cigarette wrapping material has temperature-responsive pores, which can reduce the smoke temperature and the inhalation resistance while increasing the smoke volume, thereby improving the user's smoking experience.

[0005] The technical solution provided by the present invention is as follows: A cigarette wrapping material, The cigarette wrapping material is a single-layer heat-sensitive structural layer or is a composite of multiple heat-sensitive structural layers.

[0006] Wherein, the thermosensitive structural layer is prepared by the following method: (1) First, graphene oxide powder is placed in water and ultrasonically dispersed for 5 to 10 minutes to obtain a graphene oxide colloidal solution; then, N-isopropylacrylamide and a cross-linking agent are added to the graphene oxide colloidal solution and stirred to dissolve to obtain a mixed solution; (2) nitrogen is then introduced into the mixed solution to fully deoxygenate, and then an initiator is added to the mixed solution after the oxygen is removed, the mixture is fully mixed, and the mixture is reacted at a constant temperature of 25° C. for 12 hours to obtain a graphene oxide / poly (N-isopropylacrylamide) composite hydrogel; (3) The degassed hydrogel solution is evenly coated on a flat, clean substrate, and the solvent is allowed to evaporate naturally to obtain a film, or the degassed hydrogel solution is directly evenly coated on cigarette paper to obtain a composite cigarette paper. The film and the composite cigarette paper are the thermosensitive structural layer.

[0007] Wherein, the mass concentration of the graphene oxide colloidal solution is (0.01-0.1) g / L.

[0008] The ratio of graphene oxide is 2wt%-50wt% of N-isopropylacrylamide, preferably 5wt%.

[0009] Wherein, the initiator is any one of potassium persulfate, ammonium persulfate, azobisisobutyronitrile, and benzoyl peroxide; The ratio of the initiator is 3wt%-10wt% of N-isopropylacrylamide.

[0010] Wherein, the cross-linking agent is N,N'-methylenebisacrylamide, and the proportion of the cross-linking agent is 10wt%-30wt% of N-isopropylacrylamide.

[0011] Wherein, the substrate is selected from a glass sheet, a plastic sheet or a silicon sheet.

[0012] Wherein, the thermosensitive structural layer has temperature-responsive pores no larger than 100 μm.

[0013] Wherein, the cigarette wrapping material is composed of a single-layer heat-sensitive structural layer, and the heat-sensitive temperature of the single-layer heat-sensitive structural layer is 70° C.-100° C.; or The cigarette wrapping material is composited by multiple heat-sensitive structural layers, and the heat-sensitive temperature of the heat-sensitive structural layers is 80°C-200°C.

[0014] A heated cigarette, wherein the packaging material of the cigarette core of the heated cigarette is the cigarette wrapping material as described above.

[0015] Compared with the prior art, the present invention provides a cigarette wrapping material and a heated cigarette, wherein the cigarette wrapping material is a single-layer heat-sensitive structural layer or a composite of multiple heat-sensitive structural layers, and is used as a wrapping material for the filter rod and / or the cigarette core of the heated cigarette, and the pores of the filter rod or the cigarette core segment can change the opening and closing state according to the change of temperature. When not heated, the temperature is low, and the pores are in a closed state, which can reduce the entry of moisture in the environment, which is beneficial to keep the tobacco dry and slow down the moisture absorption of the cigarette; when heated, the temperature rises, the pores open, and the convection between the cigarette and the surrounding environment increases, which is beneficial to the heat loss of the cigarette and the reduction of the inhalation resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of airflow when smoking a heated cigarette in the prior art; Figure 2 This is a schematic diagram of the structure of a heated cigarette in Example 1; Figure 3 This is a schematic diagram of airflow when the heated cigarette of Example 1 is smoked; Figure 4 This is an electron microscope display of the thermosensitive layer structure; Reference numerals: 1. Cigarette wrapping material; 2. Temperature responsive pores; 3. Cigarette core segment; 4. Filter rod segment. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0019] The source of the graphene oxide of the present invention is: purity> 99%, Shanghai Aladdin Biochemical Technology Co., Ltd. The remaining materials were commercially available.

[0020] Example 1 Prepare the thermal layer structure as follows: (1) Weigh 0.02 g of graphene oxide powder, add it to 500 mL of water, and disperse it by ultrasonic for 5 min to obtain a graphene oxide colloidal solution. Add 0.4 g of N-isopropylacrylamide and 0.04 g of N,N'-methylenebisacrylamide to the graphene oxide colloidal solution, stir and dissolve, and obtain a mixed solution; (2) nitrogen was then introduced into the mixed solution to fully deoxygenate, and 0.04 g of potassium persulfate was added to the mixed solution after deoxygenation, the mixture was fully mixed, and the mixture was reacted at a constant temperature of 25° C. for 12 hours to obtain a graphene oxide / poly (N-isopropylacrylamide) composite hydrogel; (3) The degassed hydrogel solution is evenly coated on cigarette paper to obtain a temperature-responsive thin film composite cigarette paper, thereby obtaining a thermosensitive layer structure.

[0021] like Figure 4 As shown, the temperature-responsive pores of the prepared thermosensitive layer structure were observed to be 100 μm in diameter by electron microscopy at room temperature (25°C). When a 70°C heating plate was placed close to it and maintained for a period of time, the pore size expanded to 0.8 mm.

[0022] The heat-sensitive layer structure is used for the wrapping material of the core segment of the heated cigarette to prepare the heated cigarette, such as Figure 2 As shown, the heated cigarette includes a core segment 1 and a filter rod 2. The wrapping material of the core segment 1 is the single-layer temperature-responsive film 3 prepared above. The pores 4 of the single-layer temperature-responsive film 3 can change their opening and closing states according to the change of temperature. When not heated, the temperature is low and the pores are in a closed state, which can reduce the entry of moisture from the environment, help keep the tobacco dry, and slow down the moisture absorption of the cigarette; Figure 3 As shown, when heated, the temperature rises, the pores open, and the convection between the cigarette and the surrounding environment increases, which is beneficial to the heat loss of the cigarette and the reduction of the inhalation resistance.

[0023] Example 2 The multi-layer heat-sensitive layer structure composite layer is prepared as follows: (1) Weigh 0.02 g of graphene oxide powder, add it to 500 mL of water, and ultrasonically disperse it for 10 min to obtain a graphene oxide colloidal solution. Add 0.1 g of N-isopropylacrylamide and 0.03 g of N,N'-methylenebisacrylamide to the graphene oxide colloidal solution, stir and dissolve, and obtain a mixed solution; (2) nitrogen was then introduced into the mixed solution to fully deoxygenate, and 0.01 g of potassium persulfate was added to the mixed solution after deoxygenation, the mixture was fully mixed, and the mixture was reacted at a constant temperature of 25° C. for 12 hours to obtain a graphene oxide / poly (N-isopropylacrylamide) composite hydrogel; (3) The degassed hydrogel solution is evenly coated on a flat, clean glass plate to obtain a single-layer temperature-responsive film. After the first thermosensitive layer is dried or solidified, the second layer is coated, and the above steps are repeated to coat subsequent thermosensitive layers in sequence to obtain a thermosensitive layer structure composed of three single-layer temperature-responsive films.

[0024] The electron microscope observed that the temperature-responsive pores of the prepared thermosensitive layer structure had a pore size of 50 um at room temperature of 25°C. When the temperature was raised to 80°C and maintained for a period of time, the pore size expanded to 0.4 mm.

[0025] The heated cigarette is prepared by directly rolling a heated cigarette core segment with a multi-layer temperature responsive film.

[0026] Comparative Example 1 Compared with Example 1, the impermeable cigarette paper is used as the wrapping material for the tobacco core segment of the heated cigarette, the tobacco shreds are made of the same material, and the size of the tobacco core segment is the same.

[0027] Comparative Example 2 Compared with Example 1, the aluminum foil cigarette paper is used as the wrapping material for the tobacco core segment of the heated cigarette, the tobacco shreds are consistent, and the size of the tobacco core segment is the same.

[0028] The obtained cigarettes were tested for their draw resistance using a draw resistance detector, and their outlet aerosol temperature was measured using a thermocouple method. The results are as follows:

[0029] It can be seen from the above data that using the cigarette wrapping material prepared by the present invention for the cigarette core segment to prepare the heated cigarette is more conducive to the heat loss of the cigarette and the reduction of the draw resistance.

[0030] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cigarette wrapping material, characterized in that: The cigarette wrapping material is a single-layer heat-sensitive structural layer or is a composite of multiple heat-sensitive structural layers.

2. The cigarette wrapping material according to claim 1, characterized in that: The thermosensitive structural layer is prepared by the following method: (1) First, graphene oxide powder is placed in water and ultrasonically dispersed for 5 to 10 minutes to obtain a graphene oxide colloidal solution; then, N-isopropylacrylamide and a cross-linking agent are added to the graphene oxide colloidal solution and stirred to dissolve to obtain a mixed solution; (2) nitrogen is then introduced into the mixed solution to fully deoxygenate, and then an initiator is added to the mixed solution after the oxygen is removed, the mixture is fully mixed, and the mixture is reacted at a constant temperature of 25° C. for 12 hours to obtain a graphene oxide / poly (N-isopropylacrylamide) composite hydrogel; (3) The degassed hydrogel solution is evenly coated on a flat, clean substrate, and the solvent is allowed to evaporate naturally to obtain a film, or the degassed hydrogel solution is directly evenly coated on cigarette paper to obtain a composite cigarette paper. The film and the composite cigarette paper are the thermosensitive structural layer.

3. The cigarette wrapping material according to claim 2, characterized in that: The mass concentration of the graphene oxide colloidal solution is (0.01-0.1) g / L.

4. The cigarette wrapping material according to claim 2, characterized in that: The ratio of graphene oxide is 2wt%-50wt% of N-isopropylacrylamide.

5. The cigarette wrapping material according to claim 2, characterized in that: The initiator is any one of potassium persulfate, ammonium persulfate, azobisisobutyronitrile, and benzoyl peroxide; The ratio of the initiator is 3wt%-10wt% of N-isopropylacrylamide.

6. The cigarette wrapping material according to claim 2, characterized in that: The cross-linking agent is N,N'-methylenebisacrylamide, and the proportion of the cross-linking agent is 10wt%-30wt% of N-isopropylacrylamide.

7. The cigarette wrapping material according to claim 2, characterized in that: The substrate is selected from a glass sheet, a plastic sheet or a silicon sheet.

8. The cigarette wrapping material according to claim 1, characterized in that: The thermosensitive structural layer has temperature-responsive pores no larger than 100 μm.

9. The cigarette wrapping material according to claim 1, characterized in that: The cigarette wrapping material is composed of a single-layer heat-sensitive structural layer, and the heat-sensitive temperature of the single-layer heat-sensitive structural layer is 70° C.-100° C.; or The cigarette wrapping material is composited by multiple heat-sensitive structural layers, and the heat-sensitive temperature of the heat-sensitive structural layers is 80°C-200°C.

10. A heated cigarette, characterized in that: The packaging material of the heated cigarette core is the cigarette wrapping material according to any one of claims 1 to 9.

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