A cooling functional rolling paper for cigarette filters, its preparation method and application

Abstract

The present invention provides a cooling function roll paper for cigarette filter and its preparation method and application. The preparation method of the cooling function roll paper for cigarette filter of the present invention comprises: S1: mixing phase change material, solvent and surfactant and stirring to obtain a mixed solution; S2: loading the mixed solution on the surface of the roll paper, drying, and obtaining the cooling function roll paper for cigarette filter; wherein the mass content of the phase change material in the mixed solution is 3-20%, and the mass content of the surfactant is 0-5%. The present invention realizes the modification of the roll paper by phase change material through a simple process, reduces the smoke temperature at the cigarette filter part, and improves the smoking comfort of consumers.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarettes, and in particular to cooling function paper for cigarette filters, a preparation method and application thereof. Background Art

[0002] During the smoking process, the smoke temperature at the filter entrance can reach as high as 70-90°C. High-temperature smoke can easily cause thermal damage to the smoker's oral and tracheal mucosa. Traditional filter rods have poor high-temperature resistance. High-temperature smoke can cause deformation, reduce airflow velocity, and cause bending, thus reducing the consumer experience.

[0003] In order to solve the above problems, researchers usually adopt the method of changing the filter rod structure or adding cooling materials to reduce the smoke temperature. For example, the Chinese patent with publication number CN213246890U discloses a ternary composite cigarette filter rod, which is a hollow filter rod with a staged pore size reduction. The filter rod can use the reduction in filter rod size to produce a Venturi effect on the smoke flowing through, thereby reducing the smoke temperature. For example, the Chinese patent application with publication number CN113662244A reduces the smoke temperature and improves the smoke taste by adding evenly distributed phase change particles, popping beads or gel to the middle section of the acetate filter rod. For example, the Chinese patent application with publication number CN112280536A reduces the smoke temperature by blending the phase change material polyethylene glycol with the polymer elastomer polystyrene-butadiene-styrene and then adding it to the filter tip.

[0004] However, the above-mentioned method of changing the filter structure or loading the phase change material in the filter is not only complicated, but also greatly increases the weight of a single cigarette, and significantly changes the draw resistance of the cigarette, thereby destroying the user's sense of ease when smoking. Recently, a Chinese patent application with publication number CN113502692A has achieved the effect of reducing the temperature of flue gas by applying polyvinyl alcohol, glycerol, and propylene glycol to base paper through an impregnation treatment, and then processing it into cigarettes. The principle of this invention is that glycerol and propylene glycol have certain hygroscopicity and can reduce the temperature of flue gas by evaporation of water. However, it is obvious that the moisture absorption of glycerol and propylene glycol is greatly affected by the ambient temperature and humidity. Affected by this, the amount of water vapor evaporation is not stable, so it is difficult to achieve a stable cooling effect, and the cooling range is limited.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a cooling function paper for cigarette filters, and its preparation method and application. Through a simple process, the paper is modified by phase change material, the smoke temperature in the cigarette filter area is reduced, and the consumer's smoking comfort is improved.

[0007] The present invention provides a method for preparing cooling function paper for cigarette filters, comprising:

[0008] S1: mixing a phase change material, a solvent and a surfactant and stirring to prepare a mixed solution;

[0009] S2: The mixed liquid is loaded on the surface of the cigarette paper and dried to obtain the cigarette filter cigarette paper with cooling function.

[0010] In the above preparation method, the mass content of the phase change material in the mixed solution can be 3-20%, preferably 5-15%, more preferably 5-10%; the mass content of the surfactant is 0-5%. When the mass content of the surfactant is 0%, no surfactant is added to the mixed solution.

[0011] In the present invention, the phase change material is selected from one or more of aliphatic alkane phase change materials, aliphatic alcohol phase change materials, fatty acid phase change materials and polyethylene glycol; preferably, the phase change temperature of the phase change material is 30°C-80°C.

[0012] In the present invention, the solvent is selected from one or more of water, anhydrous ethanol, tetrahydrofuran, dichloromethane and petroleum ether.

[0013] In the present invention, the surfactant is selected from one or more of anionic surfactants and nonionic surfactants, preferably one or more of Tween 20, Tween 21, Tween 40, Tween 60, Tween 61, Tween 80, Tween 81, Tween 85, Span 20, Span 40, Span 60, Span 65, Span 80, Span 85 and sodium polyether sulfate.

[0014] The present invention does not impose strict restrictions on the rolling paper, and conventional rolling paper for preparing cigarette filters can be used; specifically, the rolling paper can be cellulose paper and / or plug-wrapped paper.

[0015] In the present invention, the stirring conditions include: a stirring speed of 290-4000 r / min and a stirring time of 20-40 min.

[0016] In the present invention, the mixed liquid may be loaded onto the surface of the roll paper by dipping, spraying or blade coating.

[0017] In the present invention, the drying conditions include: temperature of 50-120° C., pressure of -0.005 MPa-0 MPa, and time of 1-40 min.

[0018] The present invention also provides cooling function paper for cigarette filters, which is prepared according to the above preparation method.

[0019] The present invention also provides the use of the cooling function paper for cigarette filters in the preparation of cigarettes.

[0020] The implementation of the present invention has at least the following advantages:

[0021] 1. The present invention forms a mixture in the form of a solution or emulsion by mixing a phase change material, a solvent, and a surfactant. For insoluble aliphatic hydrocarbons, such as paraffin wax and microcrystalline wax, the phase change material uses a surfactant as an emulsifier and water as a solvent to form a phase change emulsion. For solvent-soluble phase change materials, such as fatty alcohols, fatty acids, and polyethylene glycol phase change materials, a low-boiling-point organic solvent is used to dissolve the phase change solution. The mixture is used to treat cigarette paper and then dried to obtain cooling function cigarette filter paper. Since the solvent used is water or a low-boiling-point organic solvent, the drying temperature and time of the paper can be reduced. The cooling function paper does not require a further step of eliminating static electricity and can be directly processed into a cigarette filter rod. That is, the present invention achieves the modification of the cigarette paper by the phase change material through a simple process, significantly reducing the smoke temperature in the cigarette filter area.

[0022] 2. The present invention selects a phase change material with a phase change temperature range of 30-80°C to prepare a cooling function paper for cigarette filters. Through the principle of phase change heat absorption, it has a significant cooling effect on the 30-90°C smoke at the filter end of the cigarette, and can reduce the smoke temperature at the filter end to 25-50°C, significantly improving the smoking comfort of consumers;

[0023] 3. The cooling function paper for cigarette filters obtained by the present invention replaces or partially replaces cellulose paper and / or wrapping paper in the original process of preparing cigarettes. There is no need to change the original filter rod processing process flow, and there is no obvious change in the weight, taste and draw resistance of the filter rod. Compared with other existing cigarette filter cooling technologies, it has the advantages of being simpler and more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of the thermocouple position in the cigarette filter section smoke temperature test;

[0026] Figure 2 This is a comparison chart of smoke temperature between a blank filter and various cigarette filters with cooling function paper;

[0027] Figure 3 The differential scanning calorimetry (DSC) curves of the cooling function papers for various cigarette filters are shown below:

[0028] Figure 4 Stress-strain curves of the blank cigarette paper and the cigarette filter paper with cooling function in tensile test;

[0029] Figure 5 These are the thermal gravimetric curves of blank wrapping paper, phase change material and cooling function wrapping paper for various cigarette filters. DETAILED DESCRIPTION

[0030] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular also includes the plural. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Example 1

[0034] The preparation method of cooling function paper for cigarette filter of this embodiment comprises the following steps:

[0035] 1) Preparation of mixed solution

[0036] 10 g of tetradecanol and 190 g of anhydrous ethanol were weighed, mixed, and placed in a 500 mL round-bottom flask. The mixture was mechanically stirred at a speed of 320 r / min in an electric stirrer for 30 min to obtain a mixed solution.

[0037] 2) Preparation of cooling function paper for cigarette filter

[0038] The mixed solution obtained in step 1) is applied on cigarette paper, and then the cigarette paper is treated at 50° C. and −0.01 MPa for 30 minutes to obtain cigarette filter cigarette paper with cooling function.

[0039] According to DSC testing, the phase transition temperature of the cooling functional cigarette filter paper prepared above is 36.4°C.

[0040] Example 2

[0041] The preparation method of cooling function paper for cigarette filter of this embodiment comprises the following steps:

[0042] 1) Preparation of mixed solution

[0043] 20 g of tetradecanol and 180 g of anhydrous ethanol were weighed, mixed, and placed in a 500 mL round-bottom flask. The mixture was mechanically stirred at a speed of 290 r / min in an electric stirrer for 40 min to obtain a mixed solution.

[0044] 2) Preparation of cooling function paper for cigarette filter

[0045] The mixed solution obtained in step 1) is applied on cigarette paper by blade coating, and then the cigarette paper is treated at 60° C. and −0.005 MPa for 40 minutes to obtain cigarette filter cigarette paper with cooling function.

[0046] According to DSC testing, the phase transition temperature of the cooling functional cigarette filter paper prepared above is 36.6°C.

[0047] Example 3

[0048] The preparation method of cooling function paper for cigarette filter of this embodiment comprises the following steps:

[0049] 1) Preparation of mixed solution

[0050] 30 g of tetradecanol and 170 g of anhydrous ethanol were weighed, mixed, and placed in a 500 mL round-bottom flask. The mixture was mechanically stirred at a speed of 350 r / min in an electric stirrer for 20 min to obtain a mixed solution.

[0051] 2) Preparation of cooling function paper for cigarette filter

[0052] The mixed solution obtained in step 1) is applied on cigarette paper, and then the cigarette paper is treated at 50° C. and −0.015 MPa for 20 minutes to obtain cigarette filter cigarette paper with cooling function.

[0053] According to DSC testing, the phase transition temperature of the cooling functional cigarette filter paper prepared above is 36.6°C.

[0054] Example 4

[0055] The preparation method of cooling function paper for cigarette filter of this embodiment comprises the following steps:

[0056] 1) Preparation of mixed solution

[0057] 20 g of hexadecanol and 180 g of anhydrous ethanol were weighed, mixed, and placed in a 500 mL round-bottom flask. The mixture was mechanically stirred at a speed of 320 r / min in an electric stirrer for 30 min to obtain a mixed solution.

[0058] 2) Preparation of cooling function paper for cigarette filter

[0059] The mixed solution obtained in step 1) is applied on cigarette paper, and then the cigarette paper is treated at 50° C. and −0.01 MPa for 30 minutes to obtain cigarette filter cigarette paper with cooling function.

[0060] According to DSC testing, the phase transition temperature of the cooling functional cigarette filter paper prepared above is 45.4°C.

[0061] Example 5

[0062] The preparation method of the cooling function paper for cigarette filter of this comparative example comprises the following steps:

[0063] 1) Preparation of mixed solution

[0064] 20 g of No. 58 paraffin, 180 g of water, 2 g of sodium polyether sulfate, and 2 g of Span 60 were weighed, mixed, and placed in a 500 mL round-bottom flask. The mixture was mechanically stirred at 3000 r / min in an electric stirrer for 20 min to obtain a mixed solution.

[0065] 2) Preparation of cooling function paper for cigarette filter

[0066] The mixed solution obtained in step 1) is sprayed on the cigarette paper, and then the cigarette paper is treated at 120° C. for 1 minute to obtain the cigarette filter cigarette paper with cooling function.

[0067] According to DSC testing, the phase transition temperature of the cooling functional cigarette filter paper prepared above is 56.5°C.

[0068] Example 6

[0069] The preparation method of the cooling function paper for cigarette filter of this comparative example comprises the following steps:

[0070] 1) Preparation of mixed solution

[0071] 20 g of polyethylene glycol 20000 and 180 g of water were weighed, mixed, and placed in a 500 mL round-bottom flask. The mixture was mechanically stirred at a speed of 800 r / min in an electric stirrer for 40 min to obtain a mixed solution.

[0072] 2) Preparation of cooling function paper for cigarette filter

[0073] The mixed solution obtained in step 1) is sprayed on the cigarette paper, and then the cigarette paper is treated at 120° C. for 1 minute to obtain the cigarette filter cigarette paper with cooling function.

[0074] According to DSC testing, the phase transition temperature of the cooling functional cigarette filter paper prepared above is 64.5°C.

[0075] Comparative Example 1

[0076] The preparation method of the cooling function paper for cigarette filter of this comparative example comprises the following steps:

[0077] 1) Preparation of mixed solution

[0078] 30 g of octadecane, 170 g of water, 1 g of Tween 80, and 1 g of Span 60 were weighed, mixed, and placed in a 500 mL round-bottom flask. The mixture was mechanically stirred at 2000 r / min in an electric stirrer for 20 min to obtain a mixed solution.

[0079] 2) Preparation of cooling function paper for cigarette filter

[0080] The mixed solution obtained in step 1) is scraped onto cigarette paper, and then the cigarette paper is treated at 120° C. for 1 minute to obtain cigarette filter paper with cooling function.

[0081] According to DSC testing, the phase transition temperature of the cooling functional cigarette filter paper prepared above is 25.1°C.

[0082] Comparative Example 2

[0083] The preparation method of the cooling function paper for cigarette filter of this comparative example comprises the following steps:

[0084] 1) Preparation of mixed solution

[0085] 30 g of No. 90 paraffin, 170 g of water, 2 g of sodium polyether sulfate, and 2 g of Span 60 were weighed, mixed, placed in a 500 mL round-bottom flask, and mechanically stirred at 4000 r / min in an electric stirrer for 20 min to obtain a mixed solution.

[0086] 2) Preparation of cooling function paper for cigarette filter

[0087] The mixed solution obtained in step 1) is scraped onto cigarette paper, and then the cigarette paper is treated at 120° C. for 1 minute to obtain cigarette filter paper with cooling function.

[0088] According to DSC testing, the phase transition temperature of the cooling functional cigarette filter paper prepared above is 88.5°C.

[0089] Test Example 1

[0090] The cooling function cigarette filter papers prepared in each embodiment and control example were tested for performance using the following method:

[0091] Paper roll size test: micrometer thickness gauge (AWT-CHY01, EVERTE, China), electronic digital caliper (CR2032, Battery, China);

[0092] DSC test: differential scanning calorimeter (DSC200F3, NETZSCH, Germany);

[0093] Mechanical properties test: Instron electronic universal material testing machine (68TM-10, SDL, USA);

[0094] Thermal stability test: simultaneous thermal analysis (STA2500 Regulus, NETZSCH, Germany).

[0095] The test results are shown in Table 1. Figures 1 to 5 .

[0096] Table 1 Performance test results of cooling function paper for various cigarette filters

[0097]

[0098]

[0099] After the cigarette paper is processed into finished cigarettes, the temperature of different parts of the filter tip is tested when the sixth puff is taken ( Figure 1 ), the result is as follows Figure 2 As shown in Table 1, the temperature of thermocouples No. 1 and No. 4 did not change significantly, while the temperature of thermocouples No. 7 and No. 8 decreased significantly. The temperature drop of Example 5 was the largest, 18.47°C lower than that of the blank tissue paper. Compared with the data in Table 1, when the phase change temperature of the phase change material was lower than 30°C or higher than 80°C, the flue gas temperature did not drop significantly. From the DSC test results, combined with Figure 3 As can be seen from the data in Table 1, the cooling paper has obvious endothermic behavior. With the increase of the concentration of phase change material, the phase change enthalpy increases significantly. At the same concentration, the phase change enthalpy of the paper treated with hexadecanol is higher than that of the paper treated with tetradecanol. The phase change enthalpy of the paper treated with No. 58 paraffin wax emulsion is the highest. Figure 4 According to the data in Table 1, the breaking strength of the paper after being treated with the phase change material mixture did not change significantly, but the breaking elongation and toughness increased, and the mechanical properties of the paper were enhanced. Figure 5 Thermogravimetric test results show that tetradecane and hexadecane successfully adhere to the filter paper surface, and the initial decomposition temperature of the cooling filter paper is above 120°C, indicating good stability. In summary, the cooling filter paper for cigarettes prepared using Examples 1-6 exhibits excellent dimensional stability, mechanical properties, and thermal stability, significantly reducing smoke temperature and improving consumers' smoking experience.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing cooling function paper for cigarette filter, characterized in that: include: S1: mixing a phase change material, a solvent and a surfactant and stirring them to obtain a mixed solution; S2: loading the mixed liquid on the surface of the cigarette paper, drying it, and preparing the cigarette filter cigarette paper with cooling function; The mass content of the phase change material in the mixed liquid is 3-20%, and the mass content of the surfactant is 5%; the phase change material is No. 58 paraffin, the solvent is water, and the surfactant is sodium polyether sulfate and Span 60.

2. A method for preparing cooling function paper for cigarette filter, characterized in that: include: S1: mixing the phase change material and the solvent and stirring to obtain a mixed solution; S2: loading the mixed liquid on the surface of the cigarette paper, drying it, and preparing the cigarette filter cigarette paper with cooling function; The mass content of the phase change material in the mixed liquid is 3-20%; the phase change material is hexadecanol, and the solvent is anhydrous ethanol.

3. A method for preparing cooling function paper for cigarette filter, characterized in that: include: S1: mixing the phase change material and the solvent and stirring to obtain a mixed solution; S2: loading the mixed liquid on the surface of the cigarette paper, drying it, and preparing the cigarette filter cigarette paper with cooling function; The mass content of the phase change material in the mixed liquid is 3-20%; the phase change material is polyethylene glycol 20000, and the solvent is water.

4. The preparation method according to any one of claims 1 to 3, characterized in that: The phase change temperature of the phase change material is 30°C-80°C.

5. The preparation method according to any one of claims 1 to 3, characterized in that: The roll paper is cellulose paper and / or plug paper.

6. The preparation method according to any one of claims 1 to 3, characterized in that: The stirring conditions include: a stirring speed of 290-4000 r / min and a stirring time of 20-40 min.

7. The preparation method according to any one of claims 1 to 3, characterized in that: The mixed liquid is loaded onto the surface of the roll paper by dipping, spraying or scraping.

8. The preparation method according to any one of claims 1 to 3, characterized in that: The drying conditions include: temperature of 50-120° C., pressure of -0.005 MPa to 0 MPa, and time of 1-40 min.

9. A cooling function paper for cigarette filter, characterized in that: Prepared according to any one of the preparation methods of claims 1-8.

10. Use of the cooling function paper for cigarette filter according to claim 9 in the preparation of cigarettes.

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