Cigarette paper and heating cigarette

Abstract

The invention provides cigarette paper and a heating cigarette, and belongs to the technical field of tobacco products. The cigarette paper comprises a paper base layer and an anti-osmosis membrane, the anti-osmosis membrane is used for preventing soluble substances in tobacco products from permeating into the paper base layer, the anti-osmosis membrane is formed by in-situ polymerization on the surface of the paper base layer through a silicone oil anti-seepage agent, and the silicone oil anti-seepage agent comprises at least one of amino silicone oil and vinyl silicone oil.

Description

Technical Field

[0001] The present disclosure relates to the technical field of tobacco products, and in particular to a cigarette paper and a heated cigarette. Background Art

[0002] Heat-not-burn tobacco products have attracted much attention because they are closest to traditional cigarettes in terms of sensory quality and smoking methods. Due to the different ways of use, traditional cigarettes and heated cigarettes also have certain differences in their auxiliary materials, one of which is cigarette paper. The production formula of cigarette paper used in traditional cigarettes mainly includes four major categories of substances: natural fiber, filler, combustion aid and auxiliary agent. Natural fiber is generally wood pulp fiber and hemp pulp fiber. Filler is added to increase the air permeability and whiteness of cigarette paper. Combustion aid is added to improve the combustibility of cigarette paper and promote the combustion of the entire cigarette stick. Citrate is generally used. Adding auxiliary agents is a production need. In order to improve the retention rate of fibers and the wet strength of paper, guar gum and other substances are generally used, and their dosage is very small. In the production of cigarette paper for traditional cigarettes, the above four categories of substances are indispensable, but in low-temperature cigarettes, cigarettes do not need to burn, and there is no demand for the air permeability and combustion aid content of cigarette paper. On the other hand, a large amount of propylene glycol is commonly used in heated cigarette tobacco, which has strong hygroscopicity, causing the moisture content in the tobacco to increase. The soluble substances in the tobacco are easily transferred to the cigarette paper, resulting in spots, affecting the appearance quality of the cigarette and reducing the opacity of the cigarette paper. Opacity is one of the key quality indicators of cigarette paper. The opacity of cigarette paper not only ensures the uniformity and quality of the product, but also affects the burning speed, taste and consumer experience of the cigarette. According to relevant regulations, the opacity of grade A products should not be less than 73%.

[0003] Therefore, cigarette paper needs to add new anti-permeation functions. In the related art, heated cigarettes generally use aluminum composite paper, which is formed by coating aluminum on the paper base by electroplating or transfer. Aluminum composite paper has obvious disadvantages: its preparation process is complicated and costly; aluminum cannot be recycled and causes environmental pollution. In addition, due to the introduction of metal, microwave equipment cannot be used to detect heated cigarettes produced using this cigarette paper.

[0004] Therefore, there is an urgent need to develop a cigarette paper with high opacity, good anti-permeability performance, low cost and environmental protection. Summary of the invention

[0005] In view of this, in order to at least partially solve at least one of the above-mentioned technical problems, the present disclosure provides a cigarette paper and a heated cigarette.

[0006] According to an embodiment of one aspect of the present disclosure, there is provided a cigarette paper for heating cigarettes, characterized in that the cigarette paper comprises: a paper base layer; an anti-permeation membrane for preventing soluble substances in tobacco products from penetrating into the paper base layer, the anti-permeation membrane is formed by in-situ polymerization of a silicone oil anti-permeation agent on the surface of the paper base layer, and the silicone oil anti-permeation agent comprises at least one of amino silicone oil and vinyl silicone oil.

[0007] According to an embodiment of the present disclosure, the paper base is a white paper base; the content of white filler in the white paper base is 35.0wt%~55.0wt%; the paper base weight of the white paper base is 40~70g / m 2 The above-mentioned anti-permeability membrane has a unit area mass of 2.5~5.0g / m 2 .

[0008] According to the embodiment of the present disclosure, the content of the white filler in the white paper base is 40.0wt%~50.0wt%; the paper base weight of the white paper base is 45~55g / m 2 The above-mentioned anti-permeability membrane has a mass per unit area of ​​3.0~4.5g / m 2 .

[0009] According to the embodiment of the present disclosure, the above-mentioned paper base is a natural color paper base; the paper base basis weight of the above-mentioned natural color paper base is 10~60g / m 2 The above-mentioned anti-permeation membrane has a mass per unit area of ​​1.0~5.0g / m 2 .

[0010] According to the embodiment of the present disclosure, the basis weight of the natural color paper base is 20-40 g / m 2 The above-mentioned anti-permeability membrane has a mass per unit area of ​​1.5~3.0g / m 2 .

[0011] According to an embodiment of the present disclosure, the temperature of the in-situ polymerization is 80-180°C.

[0012] According to an embodiment of the present disclosure, the paper base layer includes chitosan particles, and the chitosan particles are decomposed when the heating component heats the cigarette to form micrometer-sized holes on the cigarette paper.

[0013] According to an embodiment of the present disclosure, the particle size of the chitosan particles is 0.5-5 μm.

[0014] According to an embodiment of the present disclosure, the mass content of the chitosan particles in the paper base layer is 1% to 10%.

[0015] According to an embodiment of the present disclosure, the opacity of the cigarette paper is above 73%.

[0016] According to an embodiment of one aspect of the present disclosure, a heated cigarette is provided, comprising cigarette paper and tobacco products wrapped by the cigarette paper, wherein the cigarette paper comprises: a paper base layer; an anti-permeation membrane for preventing soluble substances in the tobacco products from penetrating into the paper base layer, wherein the anti-permeation membrane is formed by in-situ polymerization of a silicone oil anti-permeation agent on the surface of the paper base layer, and the silicone oil anti-permeation agent comprises at least one of amino silicone oil and vinyl silicone oil.

[0017] The cigarette paper for heating cigarettes provided in the embodiment of the present disclosure includes a paper base and an anti-permeation membrane, wherein the anti-permeation membrane is used to prevent soluble substances in tobacco products from penetrating into the paper base, thereby avoiding the generation of spots and ensuring the appearance quality of the cigarette paper; the anti-permeation membrane is formed by in-situ polymerization of silicone oil anti-permeation agent on the surface of the paper base, which can improve the bonding strength between the paper base and the anti-permeation membrane, reduce the amount of the anti-permeation membrane, and improve the heat resistance of the cigarette paper. The cigarette paper provided in the embodiment of the present disclosure has the advantages of high opacity, good anti-permeation performance, low cost and environmental protection. In addition, since the cigarette paper for heating cigarettes provided in the embodiment of the present disclosure does not contain metal, the microwave instrument widely used in traditional cigarettes can be used to detect the quality of heated cigarettes online, without the need to replace the detection equipment, thereby reducing the cost and ensuring the quality of heated cigarettes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0019] Figure 1 A schematic structural diagram of cigarette paper for heating cigarettes according to an embodiment of the present disclosure is shown;

[0020] In the above drawings, the meanings of the reference numerals are as follows:

[0021] 1-paper base;

[0022] 2-Impermeability-proof membrane. DETAILED DESCRIPTION

[0023] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0024] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The term "comprising" used herein indicates the existence of features, steps, operations, but does not exclude the existence or addition of one or more other features.

[0025] In the case of using expressions such as "at least one of A, B, and C, etc.", it should generally be interpreted in accordance with the meaning of the expression generally understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.). In the case of using expressions such as "at least one of A, B, or C, etc.", it should generally be interpreted in accordance with the meaning of the expression generally understood by those skilled in the art (for example, "a system having at least one of A, B, or C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0026] In the process of realizing the present disclosure, it is found that the anti-permeability performance of cigarette paper can be improved by in-situ polymerization of silicone oil anti-permeability agent on the surface of paper base to form an anti-permeability film.

[0027] Specifically, the present disclosure provides a cigarette paper for heating cigarettes, such as Figure 1 As shown, the cigarette paper comprises a paper base 1 and an anti-permeation membrane 2. The anti-permeation membrane 2 is used to prevent soluble substances in tobacco products from penetrating into the paper base 1. The anti-permeation membrane 2 is formed by in-situ polymerization of a silicone oil anti-permeation agent on the surface of the paper base 1. The silicone oil anti-permeation agent comprises at least one of amino silicone oil and vinyl silicone oil.

[0028] The cigarette paper for heating cigarettes provided by the embodiment of the present disclosure comprises a paper base 1 and an anti-permeation membrane 2, wherein the anti-permeation membrane 2 is used to prevent soluble substances in tobacco products from penetrating into the paper base 1, thereby avoiding the generation of spots and ensuring the appearance quality of the cigarette paper; the anti-permeation membrane 2 is formed by in-situ polymerization of a silicone oil anti-permeation agent on the surface of the paper base 1, thereby improving the bonding strength between the paper base 1 and the anti-permeation membrane 2, reducing the amount of the anti-permeation membrane 2, and improving the heat resistance of the cigarette paper. The cigarette paper provided by the embodiment of the present disclosure has the advantages of high opacity, good anti-permeation performance, low cost and environmental protection.

[0029] In addition, since the cigarette paper for heated cigarettes provided in the embodiment of the present disclosure does not contain metal, the quality of heated cigarettes can be detected online using microwave instruments widely used in traditional cigarettes, without the need to replace detection equipment, thereby reducing costs and ensuring the quality of heated cigarettes.

[0030] According to the embodiments of the present disclosure, the paper base layer 1 can be a white paper base layer or a natural color paper base layer. Different paper base layers 1 have different requirements for the mass per unit area of ​​the anti-permeability film 2 in terms of silicon, and also have different requirements for the paper base basis weight and additives. In order to ensure the anti-permeability performance and opacity of cigarette paper, the present disclosure studies different paper base layers 1.

[0031] In some embodiments of the present disclosure, the paper base layer 1 may be a white paper base layer. The white paper base layer may be produced using white pulp. The present disclosure does not limit the selection of white pulp. The relevant technicians may select white pulp according to actual needs. For example, the white pulp may be an existing commercial pulp. White filler may be added to the pulp. The content of the white filler in the white paper base layer may be 35.0wt% to 55.0wt%. Optionally, the content of the white filler may be 40.0wt% to 50.0wt%. Exemplarily, the content of the white filler may be 35.0wt%, 36.0wt%, 37.0wt%, 38.0wt%, 39.0wt%, 40.0wt%, 41.0wt%, 42.0wt%, 43.0wt%, 44.0wt%, 45.0wt%, 48.0wt%, 50.0wt%, 52.0wt%, 55.0wt% or a range consisting of any two of the above values. The present disclosure does not limit the selection of white filler. The relevant technicians may select white filler according to actual needs. For example, the white filler may be calcium carbonate. The content of calcium carbonate in the white paper base can be 35.0wt%~55.0wt%. The purpose of using white pulp and white filler is to make the finished paper white and provide a certain degree of opacity to the paper.

[0032] The basis weight of the white paper base is 40~70g / m 2 Optionally, the basis weight of the white paper base can be 45-55 g / m 2 For example, the basis weight of the white paper base layer may be 40 g / m 2 , 45g / m 2 , 50g / m 2 , 55g / m 2 , 60g / m 2 , 65g / m 2 , 70g / m 2 Or it can be a range consisting of any two of the above values. Appropriate paper base weight can keep a certain strength of the white paper base after adding white filler.

[0033] When the paper base 1 is a white paper base, the mass per unit area of ​​the anti-permeation membrane 2 in terms of silicon may be 2.5 to 5.0 g / m 2 Optionally, the mass per unit area of ​​the anti-permeability membrane 2 in terms of silicon may be 3.0-4.5 g / m2 For example, the mass per unit area of ​​the protective film in terms of silicon may be 2.5 g / m 2 , 2.8g / m 2 3.0g / m 2 3.5g / m 2 4.0g / m 2 4.5g / m 2 4.8g / m 2 5.0g / m 2 Or it is a range consisting of any two of the above values. Suitable unit area mass can make the anti-permeation membrane 2 have both anti-permeation performance and suitable tearing strength.

[0034] In some embodiments of the present disclosure, the paper base layer 1 may be a natural color paper base layer. The natural color paper base layer may be produced using natural color pulp, which may be yellow wood pulp that has not been bleached, and no filler is added during the production of the paper base. The present disclosure does not limit the selection of natural color pulp, and relevant technicians may select natural color pulp according to actual needs. For example, the natural color pulp may be existing commercial pulp.

[0035] The basis weight of natural paper base can be 10~60g / m 2 Optionally, the basis weight of the natural paper base can be 20-40 g / m 2 For example, the basis weight of the natural paper base layer may be 10 g / m 2 , 15g / m 2 , 20g / m 2 , 25g / m 2 , 30g / m 2 , 35g / m 2 , 40g / m 2 , 45g / m 2 , 50g / m 2 , 55g / m 2 , 60g / m 2 Or a range consisting of any two of the above values.

[0036] When the paper base layer 1 is a natural color paper base layer, the mass per unit area of ​​the anti-permeability membrane 2 in terms of silicon can be 1.0-5.0 g / m 2 Optionally, the mass per unit area of ​​the anti-permeability membrane 2 in terms of silicon may be 1.5 to 3.0 g / m 2 For example, the mass per unit area of ​​the anti-permeation membrane 2 in terms of silicon may be 1.0 g / m 2 , 1.5g / m 2 , 2.0g / m 2 , 2.5g / m 2 3.0g / m 23.5g / m 2 4.0g / m 2 4.5g / m 2 5.0g / m 2 Or it is a range consisting of any two of the above values. Suitable unit area mass can make the anti-permeation membrane 2 have both anti-permeation performance and suitable tearing strength.

[0037] According to an embodiment of the present disclosure, the opacity of the cigarette paper is above 73%. By making the opacity of the cigarette paper above 73%, the quality of the heated cigarette made of the cigarette paper can be improved.

[0038] According to an embodiment of the present disclosure, the paper base layer 1 includes chitosan particles, which decompose when the heating component heats the cigarette to form micron-sized holes on the cigarette paper. The chitosan particles decompose to form micron-sized holes on the paper base layer 1 first, and the holes in the paper base layer 1 will damage the anti-permeation membrane 2, so that the anti-permeation membrane 2 also forms micron-sized holes accordingly. The size of the micron-sized holes can be adjusted by controlling the particle size of the chitosan particles.

[0039] It should be noted that the paper base layer 1 includes a number of chitosan particles. When the heating component heats the heated cigarette, all or part of the chitosan particles may be decomposed to form micron-sized holes on the cigarette paper.

[0040] According to the embodiments of the present disclosure, chitosan particles are a kind of high molecular biodegradable material polymerized with lactic acid as the main raw material, which is insoluble in water. Chitosan particles can be attached to wood pulp fibers during the papermaking process, which can be effectively added; chitosan begins to decompose at about 200°C and decomposes rapidly in the range of 250~300°C; during the use of heated cigarettes, the temperature of the heating component of the heated smoking device is generally around 300°C, at which time the granular chitosan decomposes rapidly, and micron-sized pores are generated on the cigarette paper, which can increase the real-time air permeability of the cigarette paper; when smoking heated cigarettes, external air can enter the cigarette through the cigarette paper, and the air distribution is more uniform, which is conducive to the pyrolysis of tobacco products such as tobacco shreds and tobacco flakes, thereby improving the smoking quality.

[0041] According to an embodiment of the present disclosure, the particle size of the chitosan particles is 0.5 to 5 μm. Optionally, the particle size of the chitosan particles can be 1 to 3 μm. Exemplarily, the particle size of the chitosan particles can be 0.5 μm, 1.0 μm, 1.5 μm, 2.0 μm, 2.5 μm, 3.0 μm, 3.5 μm, 4.0 μm, 4.5 μm, 5.0 μm or a range consisting of any two of the above values. The particle size of the chitosan particles is within the above numerical range, so that the granular chitosan can be decomposed to produce holes of appropriate size on the cigarette paper, which not only ensures the air permeability of the cigarette paper, but also avoids the holes being too large, causing damage to the cigarette paper.

[0042] The mass content of chitosan particles in the paper base layer 1 is 1% to 10%. Optionally, the content of chitosan particles in the paper base layer 1 can be 4% to 8%. Exemplarily, the content of chitosan particles in the paper base layer 1 can be 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10% or a range consisting of any two of the above values. When the content of chitosan particles is within the above numerical range, the granular chitosan can generate a suitable number of holes on the cigarette paper after decomposition, which ensures the air permeability of the cigarette paper while avoiding excessive holes that damage the cigarette paper.

[0043] According to the embodiments of the present disclosure, the silicone oil impermeable agent may include amino silicone oil, the silicone oil impermeable agent may also include vinyl silicone oil, and the silicone oil impermeable agent may also include amino silicone oil and vinyl silicone oil. Amino silicone oil and vinyl silicone oil are liquid substances with good dispersion uniformity on the substrate. They can penetrate into the paper base layer 1 and combine with the fibers; after treatment under high temperature conditions, the binding force is further enhanced to form a more solid, dense and continuous impermeable membrane 2, which is the advantage of in-situ polymerization. If a polymer such as a solid or gel-state silicone resin is used for direct coating, a large amount of adhesive is required for bonding, and the adhesive itself must also be waterproof and impermeable, and it is difficult to form a continuous film, and the overall coating amount is also larger.

[0044] Among them, amino silicone oil can cross-link itself at high temperature and has film-forming properties; curing agents such as tin acetate can also be added to accelerate the curing of amino silicone oil. Vinyl silicone oil has no film-forming properties and needs to be cross-linked by a cross-linking agent and a catalyst to form a thin film. At room temperature, amino silicone oil and vinyl silicone oil remain liquid from a microscopic point of view, and do not solidify into a solid film. Therefore, they need to be cured into a film to achieve better anti-penetration effects. Amino silicone oil and vinyl silicone oil can be commercially available products, and relevant technicians can make conventional choices according to actual needs.

[0045] It should be noted that the silicone oil anti-seepage agent may include not only amino silicone oil and / or vinyl silicone oil but also a solvent so that the amino silicone oil and / or vinyl silicone oil can be evenly coated on the surface of the paper base.

[0046] Exemplarily, the silicone oil anti-seepage agent can also include ethanol, and the volume ratio of amino silicone oil and / or vinyl silicone oil to ethanol in the silicone oil anti-seepage agent can be 1:1~1:10. Optionally, the volume ratio of amino silicone oil and / or vinyl silicone oil to ethanol can be 1:1, 1:2, 1:3, 1:4, 1:5, 1:6, 1:7, 1:8, 1:9, 1:10 or a range consisting of any two of the above values.

[0047] Furthermore, the silicone oil anti-seepage agent may also include a catalyst, a curing agent, etc., so that the amino silicone oil and / or the vinyl silicone oil are polymerized to form a protective film.

[0048] According to an embodiment of the present disclosure, the temperature of the in-situ polymerization is 80-180° C. Optionally, the temperature of the in-situ polymerization may be 130-160° C. Exemplarily, the temperature of the in-situ polymerization may be 80° C., 90° C., 100° C., 110° C., 120° C., 130° C., 140° C., 150° C., 160° C., 170° C., 180° C., or a range consisting of any two of the above values.

[0049] According to another embodiment of the present disclosure, a method for preparing cigarette paper for heating cigarettes is provided, comprising step S2. In step S2, a silicone oil impermeable agent is in situ polymerized on the surface of a paper base to form an impermeable film, wherein the silicone oil impermeable agent comprises at least one of amino silicone oil and vinyl silicone oil.

[0050] The preparation method of cigarette paper provided by the embodiment of the present disclosure has simple process, easy operation, energy saving and environmental protection, and can complete the production of cigarette paper without special equipment, thereby reducing the production cost of cigarette paper.

[0051] According to an embodiment of the present disclosure, before step S2, step S11 or step S12 may be further included.

[0052] In step S11, white pulp may be used to prepare a paper base. Optionally, calcium carbonate may be added to the pulp, and the content of calcium carbonate in the paper base (calculated as calcium oxide) is 15.0% to 25.0%, and optionally, 17.0% to 22.0%; the basis weight of the paper base may be 40 to 70 g / m 2 , optionally, 45~55g / m 2 .

[0053] In step S12, the paper base layer may be prepared using natural pulp, which may be yellow wood pulp that has not been bleached. Optionally, the paper base may have a basis weight of 10-60 g / m 2 , optionally, 20~40g / m 2 . Unbleached pulp has a higher opacity.

[0054] According to an embodiment of the present disclosure, in step S2, a silicone oil anti-seepage agent may be applied to the surface of the paper base. When the paper base is prepared using white pulp, the unit area mass of the anti-seepage film in terms of silicon may be 2.5-5.0 g / m 2 , optional: 3.0~4.5g / m 2 When natural pulp is used to prepare the paper base, the mass per unit area of ​​the anti-permeability membrane in terms of silicon can be 1.0-5.0 g / m 2 , optional: 1.5~3.0g / m 2 .

[0055] According to an embodiment of the present disclosure, in step S2, a silicone oil anti-seepage agent is applied to the surface of the paper base and then cured under high temperature conditions. The curing temperature can be 80-180°C, and optionally, 130-160°C. The curing time is closely related to the temperature. The higher the temperature, the shorter the curing time, and the lower the temperature, the longer the curing time. The curing time ranges from a few seconds to a few days. The absence of liquid substance on the surface of the paper base indicates that it has been cured. The curing time is not limited here. High temperature curing can be used to shorten the operation time.

[0056] According to an embodiment of one aspect of the present disclosure, a heated cigarette and a tobacco product wrapped in cigarette paper are provided, including cigarette paper, the cigarette paper comprising: a paper base layer; an anti-permeation membrane for preventing soluble substances in the tobacco product from penetrating into the paper base layer, the anti-permeation membrane being formed by in-situ polymerization of a silicone oil anti-permeation agent on the surface of the paper base layer, the silicone oil anti-permeation agent comprising at least one of amino silicone oil and vinyl silicone oil.

[0057] The embodiments of the present disclosure do not limit the tobacco products wrapped in cigarette paper, and relevant technicians can select tobacco products according to actual needs. For example, the tobacco products wrapped in cigarette paper can include shredded tobacco, tobacco flakes, tobacco particles, etc.

[0058] It should be noted that in heated cigarettes, one side of the anti-permeation layer of the cigarette paper is the inner surface, which is in contact with the tobacco product to prevent soluble substances in the tobacco product from penetrating into the paper base layer.

[0059] The present invention will be described in detail below in conjunction with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0060] Detection method:

[0061] Anti-seepage effect detection:

[0062] After the cigarette papers provided in the examples and comparative examples were placed under the conditions of a temperature of 38° C. and a humidity of 80% for 24 hours, the stains on the outer surface of the cigarette papers were observed to see whether they were visible to the naked eye.

[0063] Opacity detection:

[0064] The cigarette papers provided in the examples and comparative examples were subjected to opacity testing in accordance with GB / 1543-2005 Determination of opacity of paper and paperboard (paper backing) (diffuse reflection method).

[0065] Cigarette sensory quality evaluation:

[0066] The sensory quality of cigarettes was evaluated according to the methods recommended in “Cigarettes - Part 2: Sensory Technical Requirements” (GB 5606.2-2005).

[0067] Example 1

[0068] This embodiment provides a cigarette paper, which includes a paper base and an anti-permeation film. The anti-permeation film is used to prevent soluble substances in tobacco products from penetrating into the paper base, and the anti-permeation film is formed by in-situ polymerization of a silicone oil anti-permeation agent on the surface of the paper base. The silicone oil anti-permeation agent includes vinyl silicone oil.

[0069] This embodiment also provides a method for preparing the cigarette paper. The relevant process parameters are detailed in Table 1, and the method comprises the following steps:

[0070] (1) The paper base is prepared by using pulp, and calcium carbonate is added to the pulp. The calcium carbonate content in the paper base is 46.7wt%, and the basis weight of the paper base is 51.5g / m 2 , no chitosan particles were added.

[0071] (2) A permeation-proof film is formed by in-situ polymerization of a silicone oil permeation-proof agent on the surface of a paper base, thereby obtaining cigarette paper for heating cigarettes. The permeation-proof film has a unit area mass of 3.9 g / m2 in terms of silicon. 2 , the in-situ polymerization temperature is 140°C.

[0072] Example 2 to Example 14, Comparative Example 1 to Comparative Example 14

[0073] Embodiment 2 to embodiment 7, comparative example 1 to comparative example 7 provide a cigarette paper and a preparation method thereof, except that the relevant preparation parameters are adjusted according to Table 1, the rest are the same as embodiment 1, and no further description is given. Among them, in embodiment 1, embodiment 2, embodiment 5, embodiment 8, embodiment 9, embodiment 12, comparative example 1, comparative example 3, comparative example 8, comparative example 10, the silicone oil anti-seepage agent also includes a cross-linking agent, a small amount of hydrogen-containing silicone oil, and a catalyst, a Custer catalyst (the main component is Pt2 (1,1,3,3-tetramethyl-1,3-divinyldisiloxane) 3), and the silicone oil anti-seepage agent in comparative example 6 and comparative example 13 does not include a cross-linking agent and a catalyst. That is, in the case where the silicone oil anti-seepage agent includes vinyl silicone oil, except for Comparative Example 6 and Comparative Example 13, in the remaining embodiments and comparative examples, the silicone oil anti-seepage agent also includes a small amount of hydrogen-containing silicone oil and a catalyst Custer catalyst (the main component is Pt2 (1,1,3,3-tetramethyl-1,3-divinyldisiloxane) 3). The paper base layer of Example 6 also includes chitosan particles, the content of chitosan particles is 4.2wt%, and the particle size is 2.5μm. The paper base layer of Example 7 also includes chitosan particles, the content of chitosan particles is 6.6wt%, and the particle size is 4.1μm. The paper base layer of Example 13 also includes chitosan particles, the content of chitosan particles is 4.2wt%, and the particle size is 2.5μm. The paper base layer of Example 14 also includes chitosan particles, the content of chitosan particles is 6.6wt%, and the particle size is 4.1μm.

[0074] The cigarette papers provided in the above-mentioned embodiments and comparative examples were subjected to anti-seepage effect test (whether there are spots) and opacity test. The relevant test results are shown in Table 2.

[0075] The cigarette papers provided in Examples 3, 6, 7, 11, 13 and 14 were prepared into heated cigarettes, and the structure of the heated cigarettes was as follows: the filter rod was 33 mm long, the acetate fiber bundle was 7 mm long, the acetate fiber hollow tube was 26 mm long, and the tobacco was 12 mm long. The sensory quality of the prepared heated cigarettes was evaluated, and the scores were shown in Table 2.

[0076] Table 1

[0077]

[0078] From the analysis of Table 1, it can be seen that the opacity of the cigarette paper provided in the embodiments of the present disclosure is above 73.5%, wherein the opacity of the cigarette paper using the natural color paper base layer is above 81.6%; after being treated at a temperature of 38°C and a humidity of 80% for 24 hours, no stains visible to the naked eye are observed on the outer surface of the cigarette paper, and the anti-penetration performance is good.

[0079] From the comparative analysis, it can be seen that when the silicone oil anti-seepage agent is not polymerized or the coating amount is too small, it cannot form an effective anti-seepage film on the surface of the paper base, and visible stains are observed on the outer surface of the cigarette paper. For white paper base, a higher calcium carbonate content is often required to obtain a higher opacity.

[0080] The analysis of the sensory quality evaluation scores of cigarettes shows that the sensory quality of heated cigarettes is improved after adding chitosan particles to the paper base. This is because the chitosan particles decompose when the heating components of the heated smoking device heat the heated cigarettes to form micron-sized holes on the cigarette paper, which improves the air permeability of the cigarette paper during smoking, thereby improving the sensory quality of heated cigarettes.

[0081] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present disclosure. It should be understood that the above description is only a specific embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A cigarette paper for heating cigarettes, characterized in that: The cigarette paper comprises: Paper base; The anti-permeation membrane is used to prevent soluble substances in tobacco products from penetrating into the paper base layer. The anti-permeation membrane is formed by in-situ polymerization of a silicone oil anti-permeation agent on the surface of the paper base layer. The silicone oil anti-permeation agent includes at least one of amino silicone oil and vinyl silicone oil.

2. The cigarette paper for heating cigarettes according to claim 1, characterized in that: The paper base layer is a white paper base layer; The content of white filler in the white paper base layer is 35.0wt%~55.0wt%; The basis weight of the white paper base is 40-70 g / m 2 ; The anti-permeability membrane has a unit area mass of 2.5 to 5.0 g / m 2 .

3. The cigarette paper for heating cigarettes according to claim 2, characterized in that: The content of white filler in the white paper base layer is 40.0wt%~50.0wt%; The basis weight of the white paper base is 45-55 g / m 2 ; The anti-permeability membrane has a unit area mass of 3.0 to 4.5 g / m2 in terms of silicon. 2 .

4. The cigarette paper for heating cigarettes according to claim 1, characterized in that: The paper base layer is a natural color paper base layer; The paper base of the natural color paper base has a basis weight of 10-60 g / m 2 ; The anti-permeability membrane has a unit area mass of 1.0 to 5.0 g / m 2 .

5. The cigarette paper for heating cigarettes according to claim 4, characterized in that: The paper base of the natural color paper base has a basis weight of 20-40 g / m 2 ; The anti-permeability membrane has a unit area mass of 1.5 to 3.0 g / m 2 .

6. The cigarette paper for heating cigarettes according to any one of claim 1, characterized in that: The temperature of the in-situ polymerization is 80-180°C.

7. The cigarette paper for heating cigarettes according to any one of claims 1 to 6, characterized in that: The paper base layer includes chitosan particles, which are decomposed when the heating component heats the cigarette to form micron-sized holes on the cigarette paper.

8. The cigarette paper for heating cigarettes according to claim 7, characterized in that: The particle size of the chitosan particles is 0.5-5 μm; The mass content of the chitosan particles in the paper base layer is 1% to 10%.

9. The cigarette paper for heating cigarettes according to any one of claims 1 to 6, characterized in that: The opacity of the cigarette paper is above 73%.

10. A heated cigarette, comprising cigarette paper and a tobacco product wrapped by the cigarette paper, characterized in that: The cigarette paper comprises: Paper base; The anti-permeation membrane is used to prevent soluble substances in tobacco products from penetrating into the paper base layer. The anti-permeation membrane is formed by in-situ polymerization of a silicone oil anti-permeation agent on the surface of the paper base layer. The silicone oil anti-permeation agent includes at least one of amino silicone oil and vinyl silicone oil.

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