Low-interception high-aroma-loading hollow tube for heating cigarettes and application

Abstract

The invention discloses a low-interception high-fragrance-carrying hollow tube for heating cigarettes and application, and belongs to the technical field of heating cigarette production. The low-interception high-fragrance-loading hollow tube is of a multi-layer structure; the multilayer structure comprises at least one perfuming layer, at least one low interception layer, at least one supporting layer and at least one heat insulation layer, and the innermost layer is the perfuming layer. The perfuming layer is arranged in the inner side wall of the hollow pipe, the hollow pipe has the advantages of being large in perfuming amount, stable in perfuming and the like, in addition, the hollow pipe is provided with the low-interception layer and the heat resistance layer, the aerosol interception amount of the hollow pipe can be reduced, the risk of lip scalding can be reduced in a heat resistance mode, and the hollow pipe has the advantages of being high in perfuming efficiency and the like. And the supporting layer endows the hollow tube with good hardness and elasticity.

Description

Technical Field

[0001] The invention relates to a hollow tube, in particular to a low-entrapment hollow tube for heated cigarettes, and also to the application of the hollow tube as a hollow cooling section in heated cigarettes, belonging to the field of heated tobacco. Background Art

[0002] As people pay more attention to safety and health, the sales of heated cigarettes in foreign markets are growing. Compared with traditional cigarettes, heated cigarettes have problems such as low aroma release and insufficient smoke fullness. Usually, heated cigarettes use fruit aroma sprayed in tobacco to increase the richness of smoke. However, during the heating and smoking process, the boiling point of the added aroma is low, and the problem of insufficient aroma in the last few puffs often occurs.

[0003] In addition, studies have shown that about 57% of the aerosol released by the heated tobacco segment of heated cigarettes is retained in the hollow segment, about 28% is retained in the acetate filter segment, and only about 15% is released and inhaled by the human body. There are two main reasons why the aerosol is retained in the hollow segment during the inhalation process: 1) Condensation deposition: the aerosol cools down and condenses and deposits on the inner wall of the hollow tube; 2) the aerosol is physically intercepted and adsorbed by the inner wall of the hollow tube during the continuous movement and collision. The two reasons have different proportions of the main components of the aerosol retained in the hollow segment. For example, the water retained in the hollow segment is mainly deposited on the inner wall of the tube due to thermal diffusion and condensation; the glycerin retained in the hollow segment is mainly physically intercepted on the inner wall of the tube due to the impact of airflow; the nicotine retained in the hollow segment is affected by the two factors in a ratio of about 1:1. Summary of the invention

[0004] In view of the technical problems of existing heated cigarette products such as low aroma release, uneven aroma release, and high aerosol interception in the hollow section, the first object of the present invention is to provide a low-interception and high-aroma loading hollow tube for heated cigarettes, which can increase the release amount and uniformity of the characteristic aroma of the heated cigarette aerosol, increase the thermal conductivity of the inner wall of the tube, reduce the condensation and deposition of the aerosol on the inner wall of the tube, increase the smoothness of the inner wall of the tube, reduce the physical interception and adsorption of the aerosol, and ensure that the temperature of the outer side of the tube wall is low, reducing the risk of "burning lips".

[0005] The second object of the present invention is to provide an application of a low-interception and high-flavor-carrying hollow tube in heated cigarettes. The hollow tube is used as a functional filter rod segment with flavor enhancement, temperature reduction and low interception for heated cigarettes. The tube has the characteristics of large flavoring amount and stable flavoring. At the same time, it can reduce the interception amount of aerosol by the hollow tube and reduce the risk of "burning lips" by heat resistance.

[0006] In order to achieve the above technical objectives, the present invention provides a low-retention and high-flavor-carrying hollow tube for heated cigarettes, which has a multi-layer structure; the multi-layer structure includes at least one flavoring layer, at least one low-retention layer, at least one heat-resistant layer and at least one support layer, and the innermost layer is the flavoring layer.

[0007] The key to the hollow tube of the present invention is to design it into a composite structure with multiple functions. The innermost layer is a flavoring layer, which can give the hollow tube a characteristic aroma, which can make up for the problems of insufficient aroma of heated cigarettes and uneven aroma release. Designing it in the innermost layer can utilize the heat of the smoke to promote the release of aroma; the low retention layer gives a smooth inner wall, which has a weak adhesion ability to aerosols and a strong thermal conductivity, which can reduce the condensation and deposition of aerosols on the inner wall, thereby reducing the temperature of the hollow tube while achieving the purpose of reducing aerosol retention; the heat-resistant layer can prevent heat transfer, ensure that the temperature inside the tube is high, avoid condensation and deposition of aerosols on the inner wall and make full use of the smoke temperature to meet the aroma release, while avoiding heat conduction to the outer wall to reduce the temperature of the outer wall of the filter section and reduce the risk of "burning lips"; and the support layer can shape the hollow tube and maintain a certain hardness and elasticity.

[0008] As a preferred solution, the flavoring layer is composed of flavoring agents loaded on the surface of a polymer film material. As a preferred solution, the polymer film material is a polyethylene film or a polystyrene film. As a preferred solution, the thickness of the polymer film material does not exceed 0.1 mm. As a preferred solution, the flavoring agents are loaded on the outer surface of the polymer film material, and the coating amount is 0.2~0.6 mg / mm. The flavoring layer is a polyethylene film or a polystyrene film as a carrier, and the flavoring agents are sealed and fixed on the inner wall of the hollow tube. In particular, the thin polyethylene film or the polystyrene film can achieve a stable release of the aroma at the smoke temperature, thereby giving the hollow tube flavoring to make up for the defect of insufficient aroma release of the heated cigarette. The design of this flavoring layer can achieve a high aroma loading amount, such as a hollow tube with a length of 112 mm, and its flavoring amount can reach 20~60 mg. The thickness of the polymer film does not exceed 0.1 mm. If the thickness is too thick, it will affect the release of the aroma, but if the thickness is too thin, the aroma will volatilize in advance. The thickness of the polymer film material is further preferably 0.01~0.1 mm. The flavor is a conventional cigarette flavoring flavor in the prior art, such as mint flavor, mango flavor, etc.

[0009] As a preferred solution, the low retention layer is composed of paper doped with ceramic material or paper with a metal film on the surface. As a preferred solution, the ceramic material includes aluminum oxide and / or silicon carbide, and the doping amount of the ceramic material in the paper is 20-60wt%; the metal film includes aluminum foil, and the mass ratio of the metal film to the paper is 1:1-1:2. As a preferred solution, when the low retention layer is composed of paper doped with ceramic material, its inner surface is calendered; when the low retention layer is composed of paper with a metal-plated film on the surface, its inner surface is a metal film. The inner wall of the low retention layer is smooth and not easy to adhere to aerosols. At the same time, it has strong thermal conductivity and can use the heat of the flue gas to reduce the condensation and deposition of aerosols on the inner wall. The mass proportion of the ceramic material in the paper is not less than 20%. If the proportion is too low, it will lead to a low thermal conductivity, which will cause the aerogel to condense on its surface. The mass proportion of the ceramic material in the paper is preferably not more than 60%. If the mass proportion is too high, it will affect the forming of the paper. The paper of the low retention layer is calendered or the inner surface is a smooth metal film layer to make the inner surface smooth, which can reduce the retention of aerosols. The total gram weight of the low retention layer is not less than 40 g / cm 3 .

[0010] As a preferred solution, the heat-resistant layer is composed of inorganic heat-insulating materials mixed in paper or paper with a phase change material coating on the surface. As a preferred solution, the inorganic heat-insulating material includes glass fiber and / or rock wool; the amount of the inorganic heat-insulating material mixed in the paper is 20-40wt%. The heat-resistant layer can prevent heat transfer, reduce the temperature of the side wall of the filter segment, reduce the risk of "burned lips", and at the same time prevent the loss of heat in the hollow tube, thereby reducing the condensation and deposition of aerosols on the inner wall of the tube. The glass fiber and / or rock wool have a good heat-insulating effect, and the phase change material can quickly absorb heat through phase change, such as polylactic acid. The total gram weight of the paper of the heat-resistant layer is not less than 40 g / cm 3 .

[0011] As a preferred solution, the support layer is made of paper doped with basalt fibers. As a preferred solution, the doping amount of the basalt fibers is 20-40wt%. The introduction of the basalt fibers can give the hollow tube a shape, maintain a high hardness and have a certain elasticity. At the same time, the basalt fibers have low thermal conductivity, which can reduce the heat conduction to the outer wall, thereby reducing the temperature of the side wall of the filter segment and reducing the risk of "burning lips". The total gram weight of the paper of the support layer is not less than 40g / cm 3 .

[0012] As a preferred solution, the low-retention and high-flavor hollow tube for heating cigarettes has a four-layer structure, which is composed of a flavoring layer, a low-retention layer, a heat-resistant layer and a support layer from the inside to the outside. The four-layer structure of the hollow tube of the present invention is an ideal design, and is composed of a flavoring layer, a low-retention layer, a heat-resistant layer and a support layer from the inside to the outside, so that the functions of each layer can be fully exerted. The flavoring layer is designed in the innermost layer, and is adjacent to the low-retention layer with thermal conductivity, which can ensure sufficient heat to maintain the stable volatilization of the aroma. At the same time, the inner side of the low-retention layer is smooth and has high thermal conductivity, which can reduce the interception effect on aerosols. The design of the heat-resistant layer adjacent to the low-retention layer can avoid heat conduction to the outside, ensure that the smoke temperature of the inner wall of the hollow tube is high, which is conducive to the release of aroma and reduces the interception of aerosols by the inner wall, while ensuring that the temperature of the outer wall is low, reducing the risk of "burning lips"; in particular, the hardness and elasticity of the hollow tube are improved by introducing inorganic fibers in the support layer, which plays a mechanical support role and further plays a heat-insulating role.

[0013] The present invention also provides an application of a low-interception and high-flavor-carrying hollow tube in heated cigarettes, which is applied to heated cigarettes as a hollow cooling section with flavor enhancement and low interception functions. It is applied to heated cigarettes as a filter rod section with flavor enhancement, cooling and low interception functions, which has the characteristics of large flavoring amount and stable flavoring, and can reduce the interception amount of aerosol by the hollow tube, and can reduce the risk of "burning lips" by heat resistance.

[0014] As a preferred solution, the hollow cooling section is butt-jointed with the acetate filter rod section to form a filter rod.

[0015] Compared with the prior art, the technical solution of the present invention has the following beneficial technical effects: The hollow tube in the prior art mainly plays a cooling role, so its interception amount of aerosol is relatively large, and it does not have a flavoring function. The design of the low interception and high aroma loading hollow tube of the present invention has the following advantages: 1) It can increase the release amount and uniformity of the characteristic aroma of the heated cigarette aerosol; 2) It can reduce the condensation and deposition of the aerosol on the inner wall of the tube and the physical interception and adsorption effect of the hollow tube on the wall; 3) It can ensure the normal cooling function. In summary, the hollow tube of the present invention can not only reduce the interception amount of aerosol by the hollow tube, and make up for the problems of insufficient aroma of heated cigarettes and uneven aroma release, but also reduce the risk of "burning lips" by heat insulation. DETAILED DESCRIPTION

[0016] The following specific embodiments are intended to further illustrate the content of the present invention in detail, rather than to limit the protection scope of the claims of the present invention.

[0017] The prepared hollow tubes were tested in the following aspects: 1. Test the hardness of the hollow paper tube according to the method of GB / T22838 "Determination of physical properties of cigarettes and filter rods"; 2. The prepared hollow tube is compounded with the acetate filter segment and then rolled with the tobacco segment to form a heated cigarette (cigarette information: total length of the cigarette is 71mm, length of the acetate filter segment is 13mm, length of the hollow tube is 28mm, length of the tobacco segment is 30mm, circumference is 21mm, and filter ventilation is 50%). After smoking with a smoking machine, the main components of the hollow tube, including nicotine, moisture, and glycerin, are determined by gas chromatography, and the aroma release of the heated cigarette aerosol is analyzed by headspace gas phase analysis. Determination method: According to CORESTA recommended method No. 84.

[0018] Example 1 1) Fragrance layer: Mango flavor solution (ethanol / water as solvent) is evenly coated on the low retention layer by coating. The amount of flavor added for a length of 112 mm is 40 mg. The coating speed is 30 m / min and then dried. The drying temperature is 45 ° C and the drying time is 15 min. After drying, a polyethylene film is extruded and covered on the aroma surface. The pressure is 0.2 MPa and the film thickness is 0.1 mm.

[0019] 2) Low retention layer: After plant fibers (coniferous wood pulp and hardwood wood pulp, mass ratio of 5:5) are mixed and pulped (beating degree 50°SR), wet strength agent polyamide epichlorohydrin resin (2% of fiber mass) and retention agent cationic polyacrylamide (1% of fiber mass) are added to obtain composite pulp; after long-net papermaking and forming, it is dried (two groups of drying cylinders are used for drying, among which the pressure of the rollers in the first group of drying cylinders is 100kg / cm, the drying cylinder temperature is 130℃, and the drying time is 20min; the pressure of the rollers in the second group of drying cylinders is 60kg / cm, the drying cylinder temperature is 100℃, and the drying time is 30min) and cut to obtain hollow paper tube base paper. Aluminum foil is transferred to the surface of the base paper by transfer, and the base paper weight is 37 g / cm 3 , total weight after compounding 74 g / cm 3 .

[0020] 3) Heat-resistant layer: After the plant fiber (coniferous wood pulp and hardwood wood pulp, the mass ratio is 5:5) and the glass fiber (accounting for 30% of the plant fiber) are mixed and beaten (beating degree 50°SR), the wet strength agent polyamide epichlorohydrin resin (2% of the fiber mass) and the retention agent cationic polyacrylamide (1% of the fiber mass) are added to obtain the composite pulp; after the long-net paper is formed and dried (two groups of drying cylinders are used for drying, among which the pressure of the roller in the drying cylinder of the first group of drying cylinders is 100kg / cm, the drying cylinder temperature is 130℃, and the drying time is 20min; the pressure of the roller in the drying cylinder of the second group of drying cylinders is 60kg / cm, the drying cylinder temperature is 100℃, and the drying time is 30min) and cut, the hollow paper tube heat-resistant layer base paper is obtained, with a gram weight of 50 g / cm 3 .

[0021] 4) Support layer: After the plant fiber (coniferous wood pulp and hardwood wood pulp, the mass ratio is 5:5) and basalt fiber (accounting for 30% of the plant fiber) are mixed and beaten (beating degree 50°SR), wet strength agent polyamide epichlorohydrin resin (2% of the fiber mass) and retention agent cationic polyacrylamide (1% of the fiber mass) are added to obtain a composite pulp; after forming by long-net copying, drying (two groups of drying cylinders are used for drying, among which the pressure of the roller in the drying cylinder of the first group of drying cylinders is 100kg / cm, the drying cylinder temperature is 130℃, and the drying time is 20min; the pressure of the roller in the drying cylinder of the second group of drying cylinders is 60kg / cm, the drying cylinder temperature is 100℃, and the drying time is 30min) and slitting, the base paper of the hollow paper tube support layer is obtained, with a gram weight of 50 g / cm 3 .

[0022] 5) Compounding: The low retention layer, the heat-resistant layer and the support layer pressed together with the fragrance layer are spirally rolled into a hollow tube.

[0023] Example 2 1) Fragrance layer: The watermelon essence solution (ethanol / water as solvent) is evenly coated on the low retention layer by coating. The amount of fragrance for a length of 112 mm is 50 mg. The coating speed is 50 m / min and then dried. The drying temperature is 50 ° C and the drying time is 15 min. After drying, the polyethylene film is squeezed and covered on the aroma surface. The pressure is 0.2 Mpa and the film thickness is 0.1 mm.

[0024] 2) Low retention layer: After mixed beating (beating degree 50°SR) of plant fibers (coniferous wood pulp and hardwood pulp, mass ratio 5:5), wet strength agent polyamide epichlorohydrin resin (2% of fiber mass), retention agent cationic polyacrylamide (1% of fiber mass) and alumina powder (25% of fiber mass) are added to obtain composite pulp; after long-net papermaking and forming, it is dried (two groups of drying cylinders are used for drying, among which the pressure of the rollers in the first group of drying cylinders is 100kg / cm, the drying cylinder temperature is 130℃, and the drying time is 20min; the pressure of the rollers in the second group of drying cylinders is 60kg / cm, the drying cylinder temperature is 100℃, and the drying time is 30min) and cut to obtain hollow paper tube base paper. The base paper is calendered to ensure the smoothness of the surface, with a total gram weight of 64 g / cm 3 .

[0025] 3) Heat-insulating layer: After the plant fiber (coniferous wood pulp and hardwood wood pulp, the mass ratio is 5:5) and rock wool (accounting for 25% of the plant fiber) are mixed and pulped (beating degree 50°SR), wet strength agent polyamide epichlorohydrin resin (2% of the fiber mass) and retention agent cationic polyacrylamide (1% of the fiber mass) are added to obtain a composite pulp; after the long-web paper is formed and dried (two groups of drying cylinders are used for drying, among which the pressure of the rollers in the first group of drying cylinders is 100kg / cm, the drying cylinder temperature is 130℃, and the drying time is 20min; the pressure of the rollers in the second group of drying cylinders is 60kg / cm, the drying cylinder temperature is 100℃, and the drying time is 30min) and cut, the hollow paper tube heat-insulating layer base paper is obtained, with a gram weight of 50 g / cm 3 .

[0026] 4) Support layer: After the plant fiber (coniferous wood pulp and hardwood wood pulp, the mass ratio is 5:5) and basalt fiber (accounting for 30% of the plant fiber) are mixed and beaten (beating degree 50°SR), wet strength agent polyamide epichlorohydrin resin (2% of the fiber mass) and retention agent cationic polyacrylamide (1% of the fiber mass) are added to obtain a composite pulp; after forming by long-net copying, drying (two groups of drying cylinders are used for drying, among which the pressure of the roller in the drying cylinder of the first group of drying cylinders is 100kg / cm, the drying cylinder temperature is 130℃, and the drying time is 20min; the pressure of the roller in the drying cylinder of the second group of drying cylinders is 60kg / cm, the drying cylinder temperature is 100℃, and the drying time is 30min) and slitting, the base paper of the hollow paper tube support layer is obtained, with a gram weight of 50 g / cm 3 .

[0027] 5) Compounding: The low retention layer, the heat-resistant layer and the support layer pressed together with the fragrance layer are spirally rolled into a hollow tube.

[0028] Comparative Example 1 The plant fibers (coniferous wood pulp and hardwood wood pulp, mass ratio of 5:5) were mixed and beaten (beating degree 50°SR), and wet strength agent polyamide epichlorohydrin resin (2% of fiber mass) and retention agent cationic polyacrylamide (1% of fiber mass) were added to obtain composite pulp; after forming by long-wire copying, drying (two groups of drying cylinders were used for drying, wherein the pressure of the rollers in the drying cylinders of the first group of drying cylinders was 100kg / cm, the drying cylinder temperature was 130℃, and the drying time was 20min; the pressure of the rollers in the drying cylinders of the second group of drying cylinders was 60kg / cm, the drying cylinder temperature was 100℃, and the drying time was 30min) and slitting, the hollow paper tube base paper with a gram weight of 64 g / cm 3 , and is rolled into a hollow paper tube through spiral forming.

[0029]

[0030]

[0031]

[0032]

Claims

1. A low interception and high fragrance carrying hollow tube for heated cigarettes, characterized in that: The multi-layer structure comprises at least one fragrance layer, at least one low retention layer, at least one heat barrier layer and at least one support layer, and the innermost layer is the fragrance layer.

2. The low interception and high fragrance carrying hollow tube for heated cigarettes according to claim 1, characterized in that: The fragrance layer is composed of fragrance loaded on the surface of a polymer film material.

3. The low interception and high fragrance loading hollow tube for heated cigarettes according to claim 2, characterized in that: The polymer film material is a polyethylene film or a polystyrene film; The thickness of the polymer film material does not exceed 0.1 mm.

4. The low interception and high fragrance carrying hollow tube for heated cigarettes according to claim 2, characterized in that: The fragrance is loaded on the outer surface of the polymer membrane material, and the loading amount thereof is 0.2-0.6 mg / mm.

5. The low interception and high fragrance loading hollow tube for heated cigarettes according to claim 2, characterized in that: The low retention layer is made of paper doped with ceramic material or made of paper with a metal film on the surface.

6. The low interception and high fragrance loading hollow tube for heated cigarettes according to claim 5, characterized in that: The ceramic material includes aluminum oxide and / or silicon carbide, and the doping amount of the ceramic material in the paper is 20-60wt%; The metal film comprises aluminum foil, and the mass ratio of the metal film to paper is 1:1 to 1:

2.

7. The low interception and high fragrance loading hollow tube for heated cigarettes according to claim 5, characterized in that: When the low retention layer is made of paper doped with ceramic material, the inner surface thereof is calendered; When the low retention layer is composed of paper with a metal-plated film on the surface, the inner surface thereof is a metal film.

8. The low interception and high fragrance loading hollow tube for heated cigarettes according to claim 1, characterized in that: The heat-resistant layer is composed of The inorganic heat insulating material is mixed into the paper or the paper is composed of the paper with a phase change material coating on the surface.

9. The low interception and high fragrance loading hollow tube for heated cigarettes according to claim 8, characterized in that: The inorganic heat-insulating material comprises glass fiber and / or rock wool; the doping amount of the inorganic heat-insulating material in the paper is 20-40wt%.

10. The low interception and high fragrance loading hollow tube for heated cigarettes according to claim 1, characterized in that: The support layer is made of paper doped with basalt fibers.

11. The low interception and high fragrance loading hollow tube for heated cigarettes according to claim 8, characterized in that: The doping amount of the basalt fiber is 20-40wt%.

12. A low interception and high fragrance loading hollow tube for heated cigarettes according to any one of claims 1 to 11, characterized in that: It has a four-layer structure, which includes a fragrance layer, a low retention layer, a heat-resistant layer and a support layer from the inside to the outside.

13. Application of a low-entrapment and high-flavor-carrying hollow tube according to any one of claims 1 to 12 in heated cigarettes, characterized in that: As a hollow cooling section with flavor enhancement and low interception functions, it is used in heating cigarettes.

14. The use of a low-entrapment and high-flavor-carrying hollow tube in heated cigarettes according to claim 13, characterized in that: The hollow cooling section and the acetate filter rod section are butt-jointed and composited to form a filter rod.

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