Composite material as well as preparation method and application thereof

Abstract

The invention relates to a composite material and a preparation method and application thereof. The composite material comprises a porous base material, the porous base material is provided with a first surface and a second surface which are opposite to each other, the first surface is provided with a first cooling area, the second surface is provided with a first fragrance carrying area, the first cooling area is provided with a first cooling layer, the first cooling layer comprises a phase change cooling material, and the first fragrance carrying area is provided with a second fragrance carrying area. The phase change cooling material comprises one or more of polylactic acid, polyester, polyolefin, paraffin, polyethylene glycol and polyvinyl alcohol. According to the composite material, the cooling layer is arranged on the porous base material, the porous base material serves as a support, meanwhile, the cooling layer is carried, the fragrance carrying function is reserved, meanwhile, adsorption of the base material to moisture in smoke is reduced, the sensory quality of heated cigarettes is improved, the smoke effect is effectively controlled, and irritation is reduced.

Description

Technical Field

[0001] This application relates to the field of heated cigarette technology, and in particular to composite materials, their preparation methods, and applications. Background Technology

[0002] Heated cigarettes are characterized by high smoke temperature and rich aroma. The temperature of the tobacco in heated cigarettes is generally controlled below 400℃, reaching the atomization temperature between 250℃ and 350℃. The high-temperature atomized smoke entering the mouth through the filter section will be at a higher temperature than that of traditional cigarette smoke. Traditional cooling methods include incorporating one or more structural sections such as hollow acetate filter rods, perforated structures, polymer fasteners, and polymer sheet bundles to achieve ideal cooling effects. However, hollow acetate filter rods themselves do not possess phase change cooling properties, requiring additional external perforation to introduce external cold air for further cooling. These traditional technologies are insufficient for universally applicable aroma carrying.

[0003] Another traditional technology discloses that the membrane paper material can simultaneously satisfy the cooling and flavoring of heated cigarettes. However, although the paper in the membrane paper material can universally carry a variety of flavorings, it has a strong adsorption capacity for moisture, which will cause the smoke to dry out, reduce the sensory quality of heated cigarettes, and increase irritation.

[0004] Therefore, traditional technologies still need improvement. Summary of the Invention

[0005] Therefore, it is necessary to provide a composite material that can retain the fragrance-carrying function while reducing the adsorption of moisture in the flue gas, as well as its preparation method and application.

[0006] The technical solution proposed in this application is as follows:

[0007] In a first aspect, this application provides a composite material comprising: a porous substrate having a first surface and a second surface opposite to each other, the first surface having a first cooling region, the second surface having a first fragrance-carrying region, a first cooling layer being provided on the first cooling region, the first cooling layer comprising a phase change cooling material, the phase change cooling material comprising one or more of polylactic acid, polyester, polyolefin, paraffin wax, polyethylene glycol and polyvinyl alcohol.

[0008] The composite material of this application has a cooling layer disposed on a porous substrate, which serves as a support. At the same time, it is equipped with a specific cooling layer, which retains the aroma-carrying function while reducing the adsorption of moisture in the smoke by the substrate, improving the sensory quality of heated cigarettes, and effectively controlling the smoke effect to reduce irritation.

[0009] In some embodiments, the ratio of the area of ​​the first cooling zone to the area of ​​the first surface is (1~2):1;

[0010] And / or, the ratio of the area of ​​the first fragrance-carrying area to the area of ​​the second surface is (0.06~1):1.

[0011] In some embodiments, the first surface is further provided with a second fragrance-carrying area, and the second fragrance-carrying area and the first cooling area are alternately arranged.

[0012] In some embodiments, the number of the second fragrance-carrying zones is one more than the number of the first cooling zones.

[0013] In some embodiments, the second surface is further provided with a second cooling zone, and the second cooling zone and the first fragrance-carrying zone are alternately arranged.

[0014] In some embodiments, the number of the first fragrance-carrying zones is one more than the number of the second cooling zones.

[0015] In some embodiments, the first surface includes two second fragrance-carrying areas and a first cooling area located between the two second fragrance-carrying areas;

[0016] And / or, in the second surface, the region between the two outermost first fragrance-carrying areas, when projected along the thickness direction of the porous substrate, lies within the first cooling region of the first surface.

[0017] In some embodiments, the porous substrate includes one or more of paper, nonwoven fabric, and tobacco sheet;

[0018] And / or, the phase change cooling material is loaded onto the porous substrate by bonding or coating;

[0019] And / or, the basis weight of the composite material is 22 g / m³. 2 ~200g / m 2 ;

[0020] And / or, the basis weight of the porous substrate is 20 g / m³. 2 ~80g / m 2 .

[0021] Another aspect of this application provides a method for preparing the above-mentioned composite material, wherein the first cooling layer is loaded onto the first cooling region of the porous substrate to prepare the composite material, wherein the first cooling layer comprises a phase change cooling material, and the phase change cooling material comprises one or more of polylactic acid, polyester, polyolefin, paraffin, polyethylene glycol and polyvinyl alcohol.

[0022] This application also provides a heated cigarette, comprising a core section, a cooling section, and a filter section connected in sequence, wherein the cooling section comprises the aforementioned composite material or a composite material prepared by the aforementioned method of preparing the composite material. Attached Figure Description

[0023] Figure 1 This is a schematic cross-sectional view of the composite material of Example 1 and Comparative Example 1 of this application;

[0024] Figure 2 These are schematic cross-sectional views of the composite materials used in Examples 2 to 4 of this application;

[0025] Figure 3 This is a schematic cross-sectional view of the composite material in Example 5 of this application;

[0026] Figure 4 This is a cross-sectional schematic diagram of the composite material of Embodiment 6 of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Composite material; 10. First cooling layer; 20. Porous substrate; 30. Second cooling layer; 40. Third cooling layer; 50. Fourth cooling layer; 60. Fifth cooling layer. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0031] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0035] Unless otherwise shown or indicated in the operational embodiments, all figures used to represent the amounts, physicochemical properties, etc., of ingredients in the specification and claims are to be understood to be adjusted by the term "about" in all cases. For example, therefore, unless stated to the contrary, the numerical parameters listed in the foregoing specification and appended claims are approximations, and those skilled in the art can appropriately modify these approximations to obtain the desired characteristics by utilizing the teachings disclosed herein. The use of numerical ranges indicated by endpoints includes all numbers within that range and any range within that range; for example, 1 to 5 includes 1, 1.1, 1.3, 1.5, 2, 2.75, 3, 3.80, 4, and 5, etc.

[0036] As shown in the background section, traditional cooling solutions are insufficient for universally applicable aroma loading. For example, cellulose acetate has weak adsorption of aroma components, making it difficult to stably load or release aroma substances, and high-speed airflow may accelerate aroma evaporation and loss. Perforated structures cool the smoke by introducing outside cold air, but this also dilutes the aroma concentration; the influx of outside air reduces the relative proportion of aroma components in the smoke, resulting in a weaker aroma, and it cannot actively "load" additional aroma. Polymer fasteners / polymer sheet bundles (such as polypropylene and polyester) typically have high density and strong chemical stability, aiming to dissipate heat through thermal conduction or structural barrier, but the material itself has poor compatibility with aroma components (difficult to adsorb or bind fragrances), and high temperatures may affect the stability of aroma substances. While paper in membrane paper materials can universally load various fragrances, it has strong moisture adsorption; a large paper area leads to dry smoke, reducing the sensory quality of heated cigarettes and increasing irritation.

[0037] Based on this, please refer to Figure 1 One embodiment of this application provides a composite material 1, comprising: a porous substrate 20, the porous substrate 20 having a first surface and a second surface opposite to each other, the first surface having a first cooling zone, the second surface having a first fragrance-carrying zone, the first cooling zone having a first cooling layer 10, the first cooling layer 10 comprising a phase change cooling material, the phase change cooling material comprising one or more of polylactic acid, polyester, polyolefin, paraffin, polyethylene glycol and polyvinyl alcohol.

[0038] In some embodiments, the ratio of the area of ​​the first cooling zone to the area of ​​the first surface is (1~2):1. For example, it can be 1:1, 1.1:1, 1.2:1, 1.3:1, 1.4:1, 1.5:1, 1.6:1, 1.7:1, 1.8:1, 1.9:1 or 2:1.

[0039] Furthermore, the ratio of the area of ​​the first fragrance-carrying area to the area of ​​the second surface is (1~1.8):1.

[0040] In some embodiments, the ratio of the area of ​​the fragrance-carrying region to the area of ​​the first surface is (0.06~1):1. For example, it can be 0.06:1, 0.7:1, 0.8:1, 0.9:1 or 1:1.

[0041] Furthermore, the ratio of the area of ​​the fragrance-carrying area to the area of ​​the first surface is (0.06~0.3):1.

[0042] In some embodiments, the first fragrance-carrying area is provided with a first fragrance-carrying layer, and the fragrance-carrying substance in the first fragrance-carrying layer includes fragrances and flavorings.

[0043] In some embodiments, the cooling area per millimeter of the above-mentioned composite material is 80 mm². 2 ~300mm 2 For example, it could be 80 mm 2 90 mm 2 100 mm 2 110 mm 2 120 mm 2 130 mm 2 140 mm 2 150 mm 2 160 mm 2 170 mm 2 180 mm 2 190 mm 2 200 mm 2 210 mm 2 220 mm 2 230 mm 2 240 mm 2 250 mm 2 260 mm 2 270 mm 2 280 mm 2 290 mm 2 Or 300 mm 2 The fragrance-carrying area per millimeter of the above-mentioned composite material is 5 mm. 2 ~150 mm 2 For example, it could be 5 mm 2 15 mm 2 25 mm 2 35 mm 2 45 mm 2 55 mm 2 65 mm 2 75 mm 2 85 mm 2 95 mm 2 105 mm 2 115 mm 2 125mm², 135mm 2 145 mm 2 Or 150 mm 2 .

[0044] Furthermore, the cooling area per millimeter of the aforementioned composite material is 200 mm². 2 ~290mm 2 The fragrance-carrying area per millimeter of the above-mentioned composite material is 5 mm. 2~100mm 2 .

[0045] It is understandable that controlling the cooling area per millimeter of the above-mentioned composite material and the aroma-carrying area per millimeter of the above-mentioned composite material within the above-mentioned range can more effectively reduce the irritation of heated cigarettes, retain the aroma-carrying function while reducing the adsorption of moisture in the smoke, and improve the sensory quality.

[0046] In some embodiments, the first surface is further provided with a second fragrance-carrying area, and the second fragrance-carrying area and the first cooling area are alternately arranged.

[0047] In some embodiments, the number of the second fragrance-carrying zones is one more than the number of the first cooling zones.

[0048] In some embodiments, the first surface includes two second fragrance-carrying areas and a first cooling area located between the two second fragrance-carrying areas.

[0049] In some embodiments, the region between the two outermost first fragrance-carrying areas of the second surface, when projected along the thickness direction of the porous substrate 20, lies within the first cooling region of the first surface.

[0050] In some embodiments, the second fragrance-carrying region is provided with a second fragrance-carrying layer, and the fragrance-carrying substance in the second fragrance-carrying layer includes fragrances and flavorings.

[0051] In some embodiments, the aforementioned fragrances and flavorings can be applied to the exposed portion of the porous substrate 20 in the composite material 1 by means of spraying or roller coating.

[0052] In some embodiments, the porous substrate 20 comprises one or more of paper, nonwoven fabric, and tobacco sheet.

[0053] It is understood that the above-mentioned porous substrate includes materials with loose or porous structures, which have a universal adsorption effect on fragrance-carrying materials, tensile strength ≥3.0KN / m, and elongation ≥1%.

[0054] In some embodiments, the phase change cooling material is loaded onto the porous substrate by bonding or coating.

[0055] It is understandable that the aforementioned phase change cooling material undergoes a phase change within a temperature range of 40℃ to 200℃, and can be used to absorb heat from heated cigarette aerosols to cool the flue gas.

[0056] In some embodiments, the basis weight of the composite material 1 is 22 g / m³. 2 ~200g / m 2 .

[0057] In some embodiments, the basis weight of the porous substrate 20 is 20 g / m³.2 ~80g / m 2 .

[0058] In some embodiments, the basis weight of the aforementioned phase change cooling material is 2 g / m³. 2 ~60g / m 2 .

[0059] Another embodiment of this application provides a method for preparing a composite material, comprising loading a cooling layer onto the aforementioned porous substrate to prepare the composite material, wherein the aforementioned first cooling layer comprises a phase change cooling material, and the aforementioned phase change cooling material comprises one or more of polylactic acid, polyester, polyolefin, paraffin wax, polyethylene glycol and polyvinyl alcohol.

[0060] Another embodiment of this application provides a heated cigarette, comprising a core section, a cooling section, and a filter section connected in sequence, wherein the cooling section comprises the aforementioned composite material and a composite material prepared by the aforementioned composite material preparation method.

[0061] The heated cigarettes described above have the characteristics of retaining the aroma function while reducing the adsorption of moisture in the smoke, effectively reducing the irritation of heated cigarettes and improving sensory quality.

[0062] The following detailed description is provided with reference to specific embodiments. Unless otherwise specified, the embodiments do not include components other than unavoidable impurities. Unless otherwise specified, the reagents and instruments used in the embodiments are conventionally selected in the art. Experimental methods not specifying specific conditions in the embodiments are implemented according to conventional conditions, such as those described in literature, books, or methods recommended by the manufacturer.

[0063] Example 1

[0064] (1) Polylactic acid sheet is selected as the phase change cooling material, and cellulose paper is selected as the porous substrate 20.

[0065] (2) For example Figure 1 As shown, polylactic acid (PLA) sheets and fragrance-carrying materials are loaded onto cellulose paper. The cellulose paper has a first surface and a second surface opposite to each other. The PLA sheets are located on the first surface of the cellulose paper, and the fragrance-carrying materials are located on the second surface of the cellulose paper, thus preparing composite material 1. The weight of composite material 1 is 135 g / m³. 2 The cellulose paper has a basis weight of 80 g / m³. 2 The polylactic acid sheet has a basis weight of 50 g / m². 2 Both materials are directly laminated with a width of 120mm, meaning that the cooling area per millimeter is 120mm². 2 The fragrance-carrying area per millimeter is 120mm. 2 .

[0066] Example 2

[0067] (1) Polylactic acid sheet is selected as the phase change cooling material, and cellulose paper is selected as the porous substrate 20.

[0068] (2) Polylactic acid sheets and fragrance-carrying materials are loaded onto cellulose paper to prepare composite materials. For example, Figure 2 As shown, the cellulose paper has a first surface and a second surface opposite to each other. The first surface has a first cooling zone, and the second surface has a first fragrance-carrying zone and a second cooling zone. The second cooling zone includes a second cooling layer 30 and a third cooling layer 40. The second cooling zone and the first fragrance-carrying zone are alternately arranged. The phase change cooling material in the first cooling layer 10, the second cooling layer 30, and the third cooling layer 40 is polylactic acid sheet. The basis weight of the three-layer composite material 1 is 135 g / m². 2 The two-layer section has a basis weight of 85g / m³. 2 The cellulose paper has a basis weight of 35 g / m². 2 The polylactic acid sheet has a basis weight of 50 g / m². 2 The width of the first cooling layer 10 and the porous substrate 20 is 150 mm, while the width of the second cooling layer 30 and the third cooling layer 40 is 70 mm, and their edges are aligned with the porous substrate 20. That is, the cooling area per millimeter is 290 mm². 2 The fragrance-carrying area per millimeter is 10mm. 2 .

[0069] Example 3

[0070] (1) The phase change cooling material of the first cooling layer 10 is polylactic acid sheet, the phase change cooling material of the second cooling layer 30 and the phase change cooling material of the third cooling layer 40 are polyvinyl alcohol coating liquid, and the porous substrate 20 is cellulose paper.

[0071] (2) Polylactic acid sheets and fragrance-carrying materials are loaded onto cellulose paper to prepare composite materials. For example, Figure 2 As shown, the cellulose paper has a first surface and a second surface with opposite surfaces. The first surface has a first cooling zone, and the second surface has a first fragrance-carrying zone and a second cooling zone. The second cooling zone includes a second cooling layer 30 and a third cooling layer 40. The second cooling zone and the first fragrance-carrying zone are alternately arranged. The phase change cooling material of the first cooling layer 10 is polylactic acid sheet, and the phase change cooling materials of the second cooling layer 30 and the third cooling layer 40 are polyvinyl alcohol coating liquid. The basis weight of the three-layer composite material 1 is 90 g / m². 2 The two-layer section has a basis weight of 85g / m³. 2 The cellulose paper has a basis weight of 35 g / m². 2 The polylactic acid sheet has a basis weight of 50 g / m². 2 The coating amount of polyvinyl alcohol coating solution is 5g / m². 2The first cooling layer 10 and the porous substrate 20 are 150 mm wide, while the second cooling layer 30 and the third cooling layer 40 are both 70 mm wide, with their edges aligned with the porous substrate 20. This results in a cooling area of ​​290 mm² per millimeter. 2 The fragrance-carrying area per millimeter is 10mm. 2 .

[0072] Example 4

[0073] (1) The phase change cooling material is polylactic acid sheet, and the porous substrate 20 is Tencel nonwoven fabric.

[0074] (2) Polylactic acid sheets and fragrance-carrying materials are loaded onto cellulose paper to prepare composite material 1. Wherein, for example... Figure 2 As shown, the Tencel nonwoven fabric has a first surface and a second surface with opposite surfaces. The first surface has a first cooling zone, and the second surface has a first fragrance-carrying zone and a second cooling zone. The second cooling zone includes a second cooling layer 30 and a third cooling layer 40. The second cooling zone and the first fragrance-carrying zone are alternately arranged. The phase change cooling material in the first cooling layer 10, the second cooling layer 30, and the third cooling layer 40 is polylactic acid sheet. The basis weight of the three-layer composite material 1 is 140 g / m². 2 The two-layer section has a basis weight of 90g / m³. 2 The Tencel nonwoven fabric has a basis weight of 40g / m². 2 The polylactic acid sheet has a basis weight of 50 g / m². 2 The first cooling layer 10 and the porous substrate 20 are 150 mm wide, while the second cooling layer 30 and the third cooling layer 40 are both 70 mm wide, with their edges aligned with the porous substrate 20. This results in a cooling area of ​​290 mm² per millimeter. 2 The fragrance-carrying area per millimeter is 10mm. 2 .

[0075] Example 5

[0076] (1) Polylactic acid sheet is selected as the phase change cooling material, and cellulose paper is selected as the porous substrate 20.

[0077] (2) Polylactic acid sheets and fragrance-carrying materials are loaded onto cellulose paper to prepare composite material 1. Wherein, for example... Figure 3As shown, the cellulose paper has a first surface and a second surface opposite to each other. The first surface has a first cooling zone and a second fragrance-carrying zone. The first cooling zone includes a first cooling layer 10. The second surface has a first fragrance-carrying zone and a second cooling zone. The second cooling zone includes a second cooling layer 30 and a third cooling layer 40. The second cooling zone and the first fragrance-carrying zone are alternately arranged. The phase change cooling material in the first cooling layer 10, the second cooling layer 30, and the third cooling layer 40 is polylactic acid sheet. In the second surface, the area between the two outermost first fragrance-carrying zones, when projected along the thickness direction of the porous substrate 20, lies within the first cooling zone of the first surface. The basis weight of the three-layer composite material 1 is 135 g / m². 2 The two-layer section has a basis weight of 85g / m³. 2 The cellulose paper has a basis weight of 35 g / m². 2 The polylactic acid sheet has a basis weight of 50 g / m². 2 The porous substrate 20 has a width of 150 mm, the first cooling layer 10 has a width of 140 mm, and the second cooling layer 30 and the third cooling layer 40 are both 60 mm wide, with their edges 5 mm away from the porous substrate 20. That is, the cooling area per millimeter is 260 mm². 2 The fragrance-carrying area per millimeter is 40mm. 2 .

[0078] Example 6

[0079] (1) Polylactic acid sheet is selected as the phase change cooling material, and cellulose paper is selected as the porous substrate 20.

[0080] (2) Polylactic acid sheets and fragrance-carrying materials are loaded onto cellulose paper to prepare composite material 1. Wherein, for example... Figure 4 As shown, the cellulose paper has a first surface and a second surface opposite to each other. The first surface has a first cooling zone and a second fragrance-carrying zone. The first cooling zone includes a first cooling layer 10. The second surface has a first fragrance-carrying zone and a second cooling zone. The second cooling zone includes a second cooling layer 30, a third cooling layer 40, a fourth cooling layer 50, and a fifth cooling layer 60. The second cooling zone and the first fragrance-carrying zone are alternately arranged. The phase change cooling material in the first, second, third, fourth, and fifth cooling layers is polylactic acid sheet. In the second surface, the area between the two outermost first fragrance-carrying zones, when projected along the thickness direction of the porous substrate 20, lies within the first cooling zone of the first surface. The basis weight of the three-layer composite material 1 is 135 g / m². 2 The two-layer section has a basis weight of 85g / m³. 2 The cellulose paper has a basis weight of 35 g / m². 2 The polylactic acid sheet has a basis weight of 50 g / m². 2The porous substrate 20 has a width of 150mm, the first cooling layer 10 has a width of 135mm, and the second, third, fourth, fifth, and sixth cooling layers are all 30mm wide. The edges of the first, second, third, and fifth cooling layers 10 are 7.5mm away from the porous substrate 20, and the spacing between each cooling layer segment is 5mm. That is, the cooling area per millimeter is 255mm². 2 The fragrance-carrying area per millimeter is 45mm. 2 .

[0081] Comparative Example 1

[0082] (1) The phase change cooling material is polyvinyl alcohol coating liquid, and the porous substrate 20 is cellulose paper.

[0083] (2) For example Figure 1 As shown, polylactic acid sheets and fragrance-carrying materials are loaded onto cellulose paper, which has a first surface and a second surface. Polyvinyl alcohol coating is applied to the first surface of the cellulose paper, and the fragrance-carrying material is applied to the second surface, thus preparing composite material 1. The weight of composite material 1 is 40 g / m³. 2 The cellulose paper has a basis weight of 35 g / m². 2 The coating amount of polyvinyl alcohol coating solution is 5g / m². 2 Both materials are directly laminated with a width of 200mm, meaning that the cooling area per millimeter is 200mm². 2 The fragrance-carrying area per millimeter is 200mm. 2 .

[0084] test

[0085] 1. The composite materials obtained in the above embodiments and comparative examples are rolled into filter rod segments by embossing molding process. The cigarette core segment, cooling segment and filter rod segment are connected in sequence, wrapped with paper, and assembled into heated cigarettes. Other materials and parameters are kept consistent. Each group consists of 15 cigarettes. The temperature of the exhaust gas is tested using a smoking machine.

[0086] 2. The composite materials obtained in the above embodiments and comparative examples are rolled into filter rod segments by embossing molding process. The tobacco core segment, cooling segment and filter rod segment are connected in sequence, wrapped with paper, and assembled into heated cigarettes. The total particulate matter and moisture of the heated cigarettes are tested: specifically, the total particulate matter and moisture are measured by capturing smoke according to the national standard GB / T 19609-2004 "Determination of Total Particulate Matter and Tar by a Smoking Machine for Conventional Analysis of Cigarettes".

[0087] 3. The composite materials obtained in the above embodiments and comparative examples are rolled into filter rod segments by embossing molding process, and the cigarette core segment, cooling segment and filter rod segment are connected in sequence, wrapped with paper, and assembled into heated cigarettes. The moisture retention of the composite material segment is tested: the composite material tested by the smoking machine is taken out, extracted with isopropanol solution, and its moisture retention is measured by gas chromatography.

[0088] 4. The composite materials obtained in the above embodiments and comparative examples were rolled into filter rod segments using an embossing molding process. The cigarette core segment, cooling segment, and filter rod segment were then connected in sequence, wrapped with paper, and assembled into heated cigarettes. Sensory evaluation of the heated cigarettes was conducted: the sensory evaluation of each group of heated cigarettes was carried out in accordance with the provisions of the national standard GB5606.4-2025 for sensory technical requirements of cigarettes, with a focus on the "irritation" index. The full score for each index was 20 points, with a score difference of 0.5. The lower the irritation, the higher the score. The participants in the evaluation were experts with industry evaluation qualifications. The results are shown in Tables 1 to 4.

[0089] Table 1

[0090]

[0091] Table 2

[0092]

[0093] Table 3

[0094]

[0095] Table 4

[0096]

[0097] Table 1 shows the comparison results of the exhaust gas temperature at the outlet of heated cigarettes. Both the comparative example and the embodiment can reduce the exhaust gas temperature to an ideal state where it is not scalding. Table 2 shows the comparison results of the total particulate matter and moisture content of heated cigarettes. Reducing the aroma-carrying area per millimeter can effectively increase the total particulate matter content and moisture content in the exhaust gas. Table 3 shows the comparison results of the moisture retention of the composite material segment. The moisture retention of the multi-layer composite material segment is directly proportional to the aroma-carrying area per millimeter. Table 4 shows the sensory evaluation results of heated cigarettes. The heated cigarettes in the embodiment show a significant reduction in irritation.

[0098] In summary, compared with the composite material prepared in the comparative example, the composite material prepared in this application, by controlling the aroma-carrying area per millimeter and the cooling area per millimeter, can retain the aroma-carrying function while reducing the adsorption of moisture in the smoke, which can effectively reduce the irritation of heated cigarettes and improve sensory quality.

[0099] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A composite material, characterized in that, The invention includes: a porous substrate having a first surface and a second surface opposite to each other; the first surface having a first cooling zone; the second surface having a first fragrance-carrying zone; a first cooling layer having a first cooling zone; and the first cooling layer having a phase change cooling material, wherein the phase change cooling material includes one or more of polylactic acid, polyester, polyolefin, paraffin wax, polyethylene glycol, and polyvinyl alcohol.

2. The composite material as described in claim 1, characterized in that, The ratio of the area of ​​the first cooling zone to the area of ​​the first surface is (1~2):1; And / or, the ratio of the area of ​​the first fragrance-carrying area to the area of ​​the second surface is (0.06~1):

1.

3. The composite material as described in claim 1, characterized in that, The first surface is also provided with a second fragrance-carrying area, and the second fragrance-carrying area and the first cooling area are alternately arranged.

4. The composite material as described in claim 3, characterized in that, The number of the second fragrance-carrying zones is 1 more than the number of the first cooling zones.

5. The composite material as described in claim 3, characterized in that, The second surface is also provided with a second cooling zone, and the second cooling zone and the first fragrance-carrying zone are alternately arranged.

6. The composite material as described in claim 5, characterized in that, The number of the first fragrance-carrying zones is 1 more than the number of the second cooling zones.

7. The composite material as described in claim 6, characterized in that, The first surface includes two second fragrance-carrying areas and a first cooling area located between the two second fragrance-carrying areas; And / or, in the second surface, the region between the two outermost first fragrance-carrying areas, when projected along the thickness direction of the porous substrate, lies within the first cooling region of the first surface.

8. The composite material according to any one of claims 1 to 7, characterized in that, The porous substrate includes one or more of paper, nonwoven fabric, and tobacco sheet; And / or, the phase change cooling material is loaded onto the porous substrate by bonding or coating; And / or, the basis weight of the composite material is 22 g / m³. 2 ~200g / m 2 ; And / or, the basis weight of the porous substrate is 20 g / m³. 2 ~80g / m 2 .

9. A method for preparing the composite material according to any one of claims 1 to 8, characterized in that, The first cooling layer is loaded onto the first cooling region of the porous substrate to prepare the composite material, wherein the first cooling layer includes a phase change cooling material, and the phase change cooling material includes one or more of polylactic acid, polyester, polyolefin, paraffin, polyethylene glycol and polyvinyl alcohol.

10. A heated cigarette, characterized in that, It includes a core section, a cooling section and a filter section connected in sequence, wherein the cooling section comprises a composite material as described in any one of claims 1 to 8 or a composite material prepared by the method of preparing the composite material as described in claim 9.

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