CN111887484B - Aerosol cooling element and application thereof - Google Patents

Abstract

The present invention provides an aerosol-cooling element comprising: a kernel; and a thermally conductive layer wrapped around the core, wherein: the core comprises a phase change material, and the heat conduction layer has a heat conductivity of 30-150W/mK. The aerosol cooling element can be used for heating non-combustible tobacco products, can effectively reduce the inlet temperature of aerosol, and can also have the aroma-enhancing function.

Description

An aerosol cooling element and its application

Technical field

The invention belongs to the technical field of tobacco materials, and specifically relates to an aerosol cooling element that can be used for heating non-burning tobacco products. The aerosol cooling element can effectively reduce the inlet temperature of the aerosol and can also have a flavoring function.

Background technique

Heat-not-burn cigarettes (HnB) are a new type of tobacco product that mainly uses a heat source to heat the cartridge to emit smoke, producing smoke for consumers to inhale in a non-burning state, reducing the harmful smoke produced by combustion and thermal cracking in conventional cigarettes. ingredients and does not produce side stream smoke. For HnB, the temperature of tobacco materials when used by consumers is generally below 500°C. Since the path from the suction nozzle to the heating section is short, it is generally necessary to install a cooling component between the heating section and the suction nozzle to ensure that the smoke temperature is suitable for consumers when using it.

At present, as shown in Figure 1, traditional heat-not-burn cigarettes adopt a four-section type. The first section is an aerosol-forming base 1 made of tobacco material for generating aerosol, and the second section is a hollow tubular support member. 2. The third section is the aerosol cooling component 3, and the fourth section is the aerosol filtering component 4. In currently commercially available heat-not-burn cigarettes, the aerosol cooling component usually includes a cooling element made of folded polylactic acid film. The polylactic acid film is folded to form a plurality of channels extending longitudinally along the length of the aerosol cooling component. The aerosol generated by the aerosol-forming substrate 1 passes through the supporting heat insulation component 2 and enters the aerosol cooling component 3. After cooling, it passes through the aerosol filter component 4 and enters the consumer's mouth.

In order to better cool down aerosols and provide consumers with a more palatable temperature, researchers have modified and replaced polylactic acid films in various ways and developed a variety of improved film cooling elements. For example, CN107822198 A discloses a cooling material in which cooling gel is solidified on aluminum foil, wherein the cooling gel is made of polyethylene glycol, stearic acid, malic acid, and flavoring agents; CN 107458055A discloses a polyethylene glycol. Composite film cooling material of lactic acid film and aluminum foil; CN 104203015 B discloses a polymer sheet used as a cooling material for heat-not-burn cigarettes. The polymer sheet is selected from polyethylene, polypropylene, polyvinyl chloride, polyvinyl chloride, The group consisting of ethylene terephthalate, polylactic acid and cellulose acetate. In addition, researchers have also developed cooling elements made of phase change materials. For example, CN 107960680 A discloses a paper tube with the function of reducing the temperature of mainstream cigarette smoke and releasing flavor. The inner wall of the paper tube is coated with thermal slow-release condensate. Thermal slow-release gel will be heated and melted by the smoke during the smoking process, and absorb the heat of the smoke during the melting process, releasing the fragrance, thereby reducing the temperature of the smoke and improving the smoking quality of tobacco products; CN 107981412 A Disclosed is a flavoring and replenishing gel phase change material. The flavoring concentrate and the phase change gel are mixed to form a liquid or microcapsule, and then applied to a molding substrate to form a gel phase change material. Gel phase change materials can be used in heat-not-burn cigarettes in various ways to improve the flavor of heat-not-burn cigarettes.

Reducing smoke temperature and improving taste have always been key issues in the field of heat-not-burn cigarettes. Therefore, further research on cooling components is necessary to provide consumers with more choices.

Contents of the invention

It is an object of the present invention to provide an aerosol cooling element that can be used for heated non-burn cigarettes. Another object of the present invention is to provide an aerosol cooling element capable of reducing the smoke temperature of a heat-not-burn cigarette. Another object of the present invention is to provide an aerosol cooling element that can reduce the smoke temperature of heat-not-burn cigarettes and improve the taste of the smoke. Another object of the present invention is to provide an aerosol cooling element that can reduce the smoke temperature of a heat-not-burn cigarette and can impart a characteristic aroma to the cigarette.

Specifically, the present invention provides an aerosol cooling element, which includes:

kernel; and

Thermal conductive layer wrapped around the core,

in:

The core contains phase change material,

The thermal conductive layer has a thermal conductivity of 30-150W/m*K.

In certain embodiments, the aerosol cooling element of the present invention, wherein the phase change material has a phase change temperature of 40-120°C.

In certain embodiments, the phase change material of the present invention includes polyethylene glycol, magnesium sulfate heptahydrate, magnesium chloride hexahydrate, n-tetradecanoic acid (myristic acid), n-octadecanoic acid (stearic acid). acid), at least one of sorbitol, xylitol or erythritol.

In certain embodiments, the phase change material of the present invention includes magnesium sulfate heptahydrate or the phase change material is magnesium sulfate heptahydrate.

In certain embodiments, the phase change material of the present invention includes polyethylene glycol or the phase change material is polyethylene glycol.

In certain embodiments, the phase change material of the present invention is a mixture of PEG1000, PEG2000, and PEG10000.

In certain embodiments, the phase change material of the present invention is a mixture of PEG1000, PEG2000, and PEG10000, and the mass ratio of PEG1000, PEG2000, and PEG10000 is 1:3-5:4-6, such as 1:4:5.

In some embodiments, the phase change material of the present invention is a mixture of PEG1000, PEG2000, and PEG10000. The phase change material includes sorbitol, xylitol, and erythritol, or the phase change material is sorbitol, xylose. A mixture of alcohol and erythritol.

In certain embodiments, the phase change material in the present invention is a mixture of sorbitol, xylitol and erythritol, wherein the mass ratio of sorbitol, xylitol and erythritol is 2-4:5 -7:1, for example 3:6:1.

In certain embodiments, the phase change material of the present invention includes stearic acid or the phase change material is stearic acid.

In certain embodiments, the thermally conductive layer of the present invention includes a thermally conductive material.

In certain embodiments, the thermally conductive layer of the present invention further includes a plasticizer and a backbone polymer material.

In certain embodiments, the thermally conductive layer of the present invention includes or is made of a thermally conductive material, a plasticizer, and a matrix polymer.

In certain embodiments, the weight ratio of thermally conductive material, skeleton polymer and plasticizer in the thermally conductive layer of the present invention is 10-30:0.5-4:0.1-2, for example, 10-25:1-4:0.5 -2.

In certain embodiments, the thermally conductive material of the present invention includes at least one selected from alpha-alumina, magnesium oxide, zinc oxide, or graphite.

In certain embodiments, the thermally conductive material of the present invention is a -500 mesh powdered substance.

In certain embodiments, the backbone polymer of the present invention includes at least one selected from carboxymethylcellulose, hydroxypropylmethylcellulose, polyethylene glycol or polyvinylpyrrolidone.

In certain embodiments, the plasticizer of the present invention is selected from the group consisting of triethyl citrate, diethyl phthalate, polyethylene glycol 6000, tributyl citrate or dibutyl sebacate. of at least one.

In certain embodiments, the thermally conductive layer of the present invention includes magnesium oxide, hydroxypropylmethylcellulose, and diethyl phthalate, or the thermally conductive layer is composed of magnesium oxide, hydroxypropylmethylcellulose, and diethyl phthalate. Made from diethyl formate.

In certain embodiments, the thermally conductive layer of the present invention is made of magnesium oxide, hydroxypropylmethylcellulose, and diethyl phthalate, wherein magnesium oxide, hydroxypropylmethylcellulose, and diethyl phthalate The mass ratio of ethyl ester is 15-25:3-4:1-2, such as 20:4:2.

In certain embodiments, the thermally conductive layer of the present invention contains graphite, hydroxypropylmethylcellulose, and triethyl citrate or the thermally conductive layer is made of graphite, hydroxypropylmethylcellulose, and triethylcitrate. .

In some embodiments, the thermal conductive layer of the present invention is made of graphite, hydroxypropyl methylcellulose, and triethyl citrate, wherein the mass ratio of graphite, hydroxypropylmethylcellulose, and triethyl citrate is 10-20:1-3:0.5-1.5; for example 10:2:1.

In certain embodiments, the thermally conductive layer of the present invention contains alpha-alumina, polyvinylpyrrolidone, tributyl citrate or the thermally conductive layer is composed of alpha-alumina, polyvinylpyrrolidone, lemon Made from tributyl acid.

In certain embodiments, the thermally conductive layer of the present invention is made of α-alumina, polyvinylpyrrolidone, and tributyl citrate, wherein α-alumina, polyvinylpyrrolidone, and tributyl citrate are The mass ratio of butyl ester is 15-25:2-4:0.5-1.5, for example, 20:3:1.

In certain embodiments, the thermally conductive layer of the present invention includes zinc oxide, carboxymethylcellulose, and diethyl phthalate, or the thermally conductive layer is composed of zinc oxide, carboxymethylcellulose, and diethyl phthalate. Made of ethyl ester.

In certain embodiments, the thermally conductive layer of the present invention is made of zinc oxide, carboxymethyl cellulose, and diethyl phthalate, wherein zinc oxide, carboxymethyl cellulose, and diethyl phthalate The mass ratio is 20-25:1-3:0.5-1.5, such as 25:2:1.

In certain embodiments, the inner core of the present invention is approximately spherical and has a particle size of 2.0-3.8 mm.

In certain embodiments, the thickness of the thermally conductive layer of the present invention is 1-2 mm.

In some embodiments, the aerosol cooling element of the present invention further includes: a flavoring layer wrapped outside the thermal conductive layer.

In certain embodiments, the flavoring layer of the present invention is made of at least one selected from the following flavoring materials: eugenol, sweet cumin oil, cinnamon oil, anise oil, sweet orange oil, phenethyl alcohol , maltol.

In certain embodiments, the thickness of the flavoring layer of the present invention is 0.8-1.2 mm.

The present invention also provides a method for preparing the aerosol cooling element, including:

1) Heat and melt the phase change material to a liquid state, and drop the liquid phase change material into the condensation medium to form a core;

2) Mix the thermally conductive material, plasticizer, and skeleton polymer in an ethanol solution to form a suspension, spray it on the surface of the core, and dry to form a thermally conductive layer on the surface of the core;

3) Optionally, mix the aromatic material with ethanol (for example, an ethanol aqueous solution with a concentration of 70%-90%) to form a aromatic solution, spray it on the surface of the thermal conductive layer, dry, and form an aromatic solution on the surface of the thermal conductive layer. Fragrance layer.

In some embodiments, the method of the present invention has one or more of the following characteristics:

i) Use dropping pill equipment to drop the liquid phase change material into the condensation medium;

ii) The condensation medium is medium chain triglyceride (MCT), paraffin or vegetable oil;

iii) Mix the thermally conductive material, plasticizer, skeleton polymer and ethanol solution (for example, ethanol aqueous solution with a concentration of 20-80%), and form a suspension through ultrasonic stirring,

iv) The concentration of the thermally conductive material in the suspension is 10-20wt%, the concentration of the skeleton polymer is 0.5-4wt%, the concentration of the plasticizer is 0.1-2wt%, and the balance is an ethanol solution (for example, the concentration is 20 -80% aqueous ethanol solution);

v) Use fluidized bed coating equipment or coating pot to spray the thermally conductive suspension on the surface of the core;

vi) At a temperature of 25-35°C, use fluidized bed coating equipment or a coating pot to spray the suspension of thermally conductive material on the surface of the core;

vii) Apply the aromatic solution in an amount of 0.5-10 wt% based on the weight of the cooling element obtained in step 2.

The present invention also provides the application of the aerosol cooling element in preparing heat-not-burn tobacco products.

The present invention also provides a heat-not-burn tobacco product, which contains the aerosol cooling element of the present invention.

In certain embodiments, the heat-not-burn tobacco product of the present invention includes an aerosol-forming substrate for generating aerosol, a hollow tubular support member, an aerosol cooling member, and an aerosol filtering member, wherein the aerosol The cooling component contains the aerosol cooling element of the present invention.

In the present invention, the term "aerosol" refers to a gaseous dispersion system composed of solid or liquid particles suspended in a gas medium. For example, in heat-not-burn cigarettes, the smoke produced by the aerosol forming matrix (also called a cartridge) Gas, aerosol, and smoke can be called aerosols.

In the present invention, the term "condensation medium" refers to a liquid coolant that is incompatible with the phase change material, such as medium chain triglyceride (MCT), paraffin, vegetable oil, etc.

Beneficial effects of the invention

The aerosol cooling element provided by the present invention uses a phase change material as the core and a thermally conductive material as the outer shell. The heat is efficiently transferred to the phase change material in the inner shell through the outer shell with high thermal conductivity, and the heat is absorbed through the phase change, thereby quickly reducing the aerosol. temperature, while ensuring that the phase change material is sealed by the shell, avoiding the impact of the deformation and transfer of the phase change material on the suction resistance and sensory quality.

Furthermore, fragrance substances can be sprayed outside the thermal conductive layer of the aerosol cooling element to form a fragrance layer, thereby giving the cooling element the function of carrying fragrance. The application of the aerosol cooling element of the present invention can quickly reduce the temperature of smoke without affecting the amount of smoke, having no negative impact on sensory quality, and can impart certain style characteristics to cigarettes.

To sum up, the aerosol cooling element of the present invention has one or more of the following advantages:

-Can effectively reduce the smoke inlet temperature of heat-not-burn cigarettes;

-While reducing the temperature of the smoke, it does not affect the amount of smoke;

-While reducing the smoke temperature, it has no negative impact on sensory quality;

-While reducing the temperature of the smoke, it also gives the cigarettes a certain flavor and style.

Description of the drawings

Figure 1 is a schematic diagram of the four-stage heat-not-burn component, in which 1 is the aerosol-forming matrix used to generate aerosol, 2 is the hollow tubular support component, 3 is the aerosol cooling component, and 4 is the aerosol filter component.

Figure 2 shows an aerosol cooling element according to an embodiment of the present invention, in which 5 is the core and 6 is the thermal conductive layer.

Figure 3 shows an aerosol cooling element according to another embodiment of the present invention, in which 5 is the core, 6 is the thermal conductive layer, and 7 is the aroma layer.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is not intended to limit the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

If specific techniques or conditions are not specified in the following examples, the techniques or conditions described in literature in the field or product instructions should be followed. If the manufacturer of the materials or equipment used is not indicated, they are all conventional products that can be purchased.

As shown in Figure 2, one implementation of the present invention provides an aerosol cooling element, which includes: an inner core 5, and a thermal conductive layer 6 wrapped around the inner core, wherein the inner core contains a phase change material, and the thermal conductive layer has Thermal conductivity 30-150W/m*K.

As shown in Figure 3, one implementation of the present invention provides an aerosol cooling element, which includes: an inner core 5, a thermal conductive layer 6 wrapped outside the inner core, and an aromatic layer wrapped outside the thermal conductive layer, wherein the inner core Containing phase change materials, the thermally conductive layer has a thermal conductivity of 30-150W/m*K.

The following examples use different phase change materials and thermal conductive materials to prepare aerosol cooling elements according to the present invention.

Example 1 Preparation Example 1 of Aerosol Cooling Element

Step (1): Preparation of phase change core

Heat magnesium sulfate heptahydrate to 80°C and melt it into a liquid state. Using single-dropper pill-dropping equipment, the phase-change liquid material is dropped into medium-chain triglycerides (MCT) through free fall, forming a spherical core with a particle size of approximately 3.0 mm. Take the core out of the MCT and remove the MCT on the surface and set aside.

The magnesium sulfate heptahydrate has a phase transition temperature of 56°C and a ΔHm of 365J/g. It was purchased from Bailingwei Technology Co., Ltd. with a product number of C12490.

The MCT was purchased from Guangzhou Zhanfan Technology New Materials Co., Ltd., model KR6810L.

Step (2): Preparation of thermal conductive layer

a. Prepare the coating liquid: Mix the ground graphite powder (about 500 mesh), hydroxypropyl methylcellulose, triethyl citrate, and 50% ethanol according to the mass ratio of 10:2:1:87, then ultrasonic After 60 minutes, a suspension is formed, and the suspension is placed in a coating pot (purchased from Yunnan Bashan Biotechnology Co., Ltd., model ELIM UX52);

b. Place the magnesium sulfate heptahydrate phase change core prepared in step (1) into the coating pot, control the temperature in the coating pot between 25-35°C, spray the coating liquid evenly on the surface of the core, and dry it , forming a thermal conductive layer on the surface of the core, with a thickness of about 1mm.

The thermal conductivity of the graphite is 150W/m*K, purchased from Bailingwei Technology Co., Ltd., product number: 450621.

The hydroxypropyl methylcellulose, with a methoxy group content of 28-30wt% and a hydroxypropyl group content of 7-12wt%, was purchased from Weifang Lite Composite Materials Co., Ltd., product number: HT-F.

The triethyl citrate was purchased from Bailingwei Technology Co., Ltd., product number: 291479.

Step (3): Preparation of aroma layer

Dissolve the fragrance in 90% ethanol to obtain a flavoring solution. Spray the aromatic solution on the surface of the thermal conductive layer of the aerosol cooling element obtained in step (2). The amount of the aromatic solution applied is 1.0% of the weight of the aerosol cooling element. After drying, an aromatic solution is formed on the surface of the thermal conductive layer of the aerosol cooling element. Fragrance layer. Finally, an aerosol cooling element with a fragrance-enhancing function with a diameter of approximately 5.0 mm was obtained.

The spices used in the flavoring solution can be selected from spices with different fragrance styles according to needs. The flavoring solution used in this embodiment is a spicy flavor solution, and the flavor raw materials include: eugenol, sweet cumin oil, cinnamon oil, anise oil, sweet orange oil, phenethyl alcohol, maltol, etc.

Example 2 Preparation Example 2 of Aerosol Cooling Element

Step (1): Preparation of phase change core

Mix PEG1000, PEG2000, and PEG10000 at a mass ratio of 1:4:5 to form a phase change material with a phase change temperature of 60°C, and heat it to 80°C to melt into a liquid state. Using a single dripper pill-dropping device, the phase-change liquid material is dropped into the MCT through free fall to form a spherical core with a particle size of approximately 2.5 mm. Take the core out of the MCT and remove the MCT on the surface and set aside.

The prepared polyethylene glycol phase change material has a phase change temperature of 60°C and a ΔHm of 150J/g. PEG1000, PEG2000, and PEG10000 were purchased from Jiangsu Maoheng Chemical Co., Ltd.

Step (2): Preparation of thermal conductive layer

a. Prepare the coating solution: Mix the ground magnesium oxide powder (about 500 mesh), hydroxypropyl methylcellulose, diethyl phthalate, and 45% ethanol in a mass ratio of 20:4:2:74 Finally, ultrasonic for 60 minutes to form a suspension, and place the suspension into the coating pot;

b. Place the polyethylene glycol phase change core prepared in step (1) into the coating pot, control the temperature in the coating pot between 25-35°C, spray the coating liquid evenly on the surface of the core, and dry it , forming a thermal conductive layer on the surface of the core, with a thickness of about 1mm.

The thermal conductivity of the magnesium oxide is 40W/m*K, purchased from Bailingwei Technology Co., Ltd., product number: SY009196.

The hydroxypropyl methylcellulose, in which the methoxy group content is 28-30wt% and the hydroxypropyl group content is 7-12wt%, is purchased from Weifang Lite Composite Materials Co., Ltd., product number: HT-F;

The diethyl phthalate was purchased from Bailingwei Technology Co., Ltd., product number: 424546.

Step (3): Preparation of aroma layer

Dissolve the fragrance in 90% ethanol to obtain a flavoring solution. Spray the aromatic solution on the surface of the thermal conductive layer of the aerosol cooling element obtained in step (2). The amount of the aromatic solution applied is 2.5% of the weight of the aerosol cooling element. After drying, an aromatic solution is formed on the surface of the thermal conductive layer of the aerosol cooling element. Fragrance layer. Finally, an aerosol cooling element with a fragrance-enhancing function with a diameter of approximately 4.5 mm was obtained.

The spices used in the flavoring solution can be selected from spices with different fragrance styles according to needs. The flavoring solution used in this embodiment is a spicy flavor solution, and the flavor raw materials include: eugenol, sweet cumin oil, cinnamon oil, anise oil, sweet orange oil, phenethyl alcohol, maltol, etc.

Example 3 Preparation Example 3 of Aerosol Cooling Element

Step (1): Preparation of phase change core

Mix PEG1000, PEG2000, and PEG10000 at a mass ratio of 1:4:5 to form a phase change material with a phase change temperature of 60°C, and heat it to 70°C to melt into a liquid state. Using a single dripper pill-dropping device, the phase-change liquid material is dropped into the MCT through free fall to form a spherical core with a particle size of approximately 2.5 mm. Take the core out of the MCT and remove the MCT on the surface and set aside.

The phase change temperature of the prepared polyethylene glycol phase change material is 60°C, and ΔHm is 150J/g.

Step (2): Preparation of thermal conductive layer

a. Prepare the coating solution: Mix the ground magnesium oxide powder (about 500 mesh), hydroxypropyl methylcellulose, diethyl phthalate, and 45% ethanol in a mass ratio of 20:4:2:74 Finally, ultrasonic for 60 minutes to form a suspension, and place the suspension into the coating pot;

b. Place the polyethylene glycol phase change core prepared in step (1) into the coating pot, control the temperature in the coating pot between 25-35°C, spray the coating liquid evenly on the surface of the core, and dry it , forming a thermal conductive layer on the surface of the core, with a thickness of about 1mm.

Step (3): Preparation of aroma layer

Dissolve the fragrance in 90% ethanol to obtain a flavoring solution. Spray the aromatic solution on the surface of the thermal conductive layer of the aerosol cooling element obtained in step (2). The amount of the aromatic solution applied is 2.5% of the weight of the aerosol cooling element. After drying, an aromatic solution is formed on the surface of the thermal conductive layer of the aerosol cooling element. Fragrance layer. Finally, an aerosol cooling element with a fragrance-enhancing function with a diameter of approximately 4.5 mm was obtained.

The spices used in the flavoring solution can be selected from spices with different fragrance styles according to needs. The flavoring solution used in this embodiment is a spicy flavor solution, and the flavor raw materials include: eugenol, sweet cumin oil, cinnamon oil, anise oil, sweet orange oil, phenethyl alcohol, maltol, etc.

Example 4 Preparation Example 4 of Aerosol Cooling Element

Step (1): Preparation of phase change core

Sorbitol, xylitol, and erythritol are prepared at a mass ratio of 3:6:1 to form a phase change material with a phase change temperature of 100°C, and are heated to 90°C to melt into a liquid state. Using a single dripper pill-dropping device, the phase-change liquid material is dropped into the MCT through free fall to form a spherical core with a particle size of approximately 2.0 mm. Take the core out of the MCT and remove the MCT on the surface and set aside.

The phase change temperature of the prepared phase change material is 70°C, and ΔHm is 250J/g. Sorbitol, xylitol, and erythritol were purchased from Hebei Baiyou Biotechnology Co., Ltd., and the product numbers are: 25685, 0025, and 2575 respectively.

Step (2): Preparation of thermal conductive layer

a. Prepare the coating solution: Mix the ground α-alumina powder (about 500 mesh), polyvinylpyrrolidone, tributyl citrate, and 80% ethanol in a mass ratio of 20:3:1:76 Finally, ultrasonic for 60 minutes to form a suspension, and place the suspension into the coating pot;

b. Place the phase change core prepared in step (1) into the coating pot, control the temperature in the coating pot between 25-35°C, spray the coating liquid evenly on the surface of the core, and after drying, apply it on the surface of the core A thermally conductive layer is formed with a layer thickness of approximately 1mm.

The thermal conductivity of the α-alumina is 36W/m*K, purchased from Bailingwei Technology Co., Ltd., product number: 990643.

The polyvinylpyrrolidone was purchased from Hangzhou Juhe Chemical Co., Ltd., with the model number PVPK30;

The tributyl citrate was purchased from Bailingwei Technology Co., Ltd., product number: 179568.

Step (3): Preparation of aroma layer

Dissolve the fragrance in 90% ethanol to obtain a flavoring solution. Spray the aromatic solution on the surface of the thermal conductive layer of the aerosol cooling element obtained in step (2). The amount of the aromatic solution applied is 5.0% of the weight of the aerosol cooling element. After drying, an aromatic solution is formed on the surface of the thermal conductive layer of the aerosol cooling element. Fragrance layer. Finally, an aerosol cooling element with a fragrance-enhancing function with a diameter of approximately 4.0 mm was obtained.

The spices used in the flavoring solution can be selected from spices with different fragrance styles according to needs. The flavoring solution used in this embodiment is a spicy flavor solution, and the flavor raw materials include: eugenol, sweet cumin oil, cinnamon oil, anise oil, sweet orange oil, phenethyl alcohol, maltol, etc.

Example 5 Preparation Example 5 of Aerosol Cooling Element

The preparation method of shell core cooling material is as follows:

Step (1): Preparation of phase change core

Heat stearic acid to 90°C to melt it into a liquid state. Using a single dripper pill-dropping device, the phase-change liquid material is dropped into the MCT through free fall, forming an inner core with a particle size of approximately 3.5 mm.

The stearic acid phase transition temperature is 70°C, ΔHm is 220J/g, and it is purchased from Nantong Ruixing Chemical Co., Ltd. with model number 1842.

Step (2): Preparation of thermal conductive layer

a. Prepare the coating solution: Mix the ground zinc oxide powder (about 500 mesh), carboxymethyl cellulose, diethyl phthalate, and 35% ethanol in a mass ratio of 25:2:1:73 , a suspension is formed after ultrasonic for 60 minutes, and the suspension is placed in the coating pot;

b. Place the stearic acid phase change core prepared in step (1) into the coating pot, control the temperature in the coating pot between 25-35°C, spray the coating liquid evenly on the inner shell ball, and dry Finally, the thickness of the coating layer is 1mm.

The thermal conductivity of zinc oxide is 30W/m*K, purchased from Bailingwei Technology Co., Ltd., product number: 30-1405;

The carboxymethylcellulose was purchased from Weifang Lite Composite Materials Co., Ltd., product number: FM9-A2;

The diethyl phthalate was purchased from Bailingwei Technology Co., Ltd., product number: 424546.

Step (3): Preparation of aroma layer

Dissolve the fragrance in 90% ethanol to obtain a flavoring solution. Spray the aromatic solution on the surface of the thermal conductive layer of the aerosol cooling element obtained in step (2). The amount of the aromatic solution applied is 10.0% of the weight of the aerosol cooling element. After drying, an aromatic solution is formed on the surface of the thermal conductive layer of the aerosol cooling element. Fragrance layer. Finally, an aerosol cooling element with a fragrance-enhancing function with a diameter of approximately 5.5 mm was obtained.

The spices used in the flavoring solution can be selected from spices with different fragrance styles according to needs. The flavoring solution used in this embodiment is a spicy flavor solution, and the flavor raw materials include: eugenol, sweet cumin oil, cinnamon oil, anise oil, sweet orange oil, phenethyl alcohol, maltol, etc.

Example 6 Evaluation of the technical effects of the aerosol cooling element of the present invention

The aerosol cooling element prepared in Examples 1-5 was added to the cooling component of the heat-not-burn cigarette to obtain sample 1-5, and then the technical effect of the aerosol cooling element was evaluated. The number of aerosol cooling elements added in Samples 1-5 is listed in Table 1.

The structure of the heat-not-burn cigarette is shown in Figure 1 and includes four sections, namely an aerosol-forming base 1 made of tobacco material for generating aerosol, a hollow tubular support member 2, and an aerosol cooling member 3 , aerosol filter component 4. The length of the aerosol-forming base 1 is 16 mm, the length of the support part 2 is 4 mm, the length of the aerosol cooling part 3 is 20 mm, the length of the aerosol filter part 4 is 8 mm, and the circumference of all parts is 23.0 mm.

Among them, the aerosol-forming substrate 1 is made of ordered tobacco flakes, the supporting component 2 is a hollow tubular filter rod made of cellulose acetate tow, and the aerosol filtering component is a filter rod made of cellulose acetate tow. In Samples 1-5 and the control sample, the aerosol-forming substrate 1, the supporting member 2 and the aerosol filtering member are all the same, except that the cooling elements filled in the aerosol cooling member 3 are different. The aerosol cooling component of the control sample is filled with PLA film, which is the same as that of commercially available IQOS.

Table 1

serial number Cooling elements added to aerosol cooling components Sample 1 4 aerosol cooling elements prepared in Example 1/piece Sample 2 6 aerosol cooling elements prepared in Example 2/piece Sample 3 3 aerosol cooling elements prepared in Example 3/piece Sample 4 6 aerosol cooling elements prepared in Example 4/piece Sample 5 3 aerosol cooling elements prepared in Example 5/piece control sample PLA film

6.1 Comparative analysis of sample sensory quality:

Sensory evaluation was carried out on samples 1-5 and control samples. The sensory quality evaluation standards are shown in Table 2.

Table 2 Sensory quality evaluation indicators and scoring standards for heat-not-burn cigarettes

The sensory quality evaluation results are shown in Table 3.

Table 3 Sensory quality evaluation results of heat-not-burn cigarettes

The results show that compared with the control sample, the smoke volume, aroma, flavor, energy, coordination, irritation, and taste of the heat-not-burn cigarette added with the aerosol cooling element of the present invention are all improved, and the total score of sensory quality is significantly improved. . This shows that the aerosol cooling element of the present invention has no negative impact on the smoke volume and sensory quality, and can also impart certain style characteristics to the cigarette through the aroma layer.

6.2 Comparative analysis of sample mainstream smoke:

Mainstream smoke analysis and evaluation were conducted on the heat-not-burn cigarettes of Samples 1-5 and the control sample.

Experimental instruments: SM450 linear smoking machine (British Cerulean company); 6890A gas chromatograph; Shandong China Tobacco Eter heating smoking set.

Smoking mode: Canadian deep inhalation (HCI) mode is used, with a smoking volume of 55mL, bell-shaped wave, 2s puffing, 30s interval, and 8 puffs per cigarette.

Testing method: Mainstream smoke indicators (total particulate matter, nicotine, glycerin) are tested according to the GB/T19609-2004 and GB/T23356-2009 analysis methods; 5 samples are tested for each sample and the average value is taken.

The mainstream smoke analysis results are shown in Table 4. The results show that the aerosol cooling element prepared by the present invention has no effect on the amount of smoke in the cigarette, and even increases the amount of smoke compared with the control sample (taking glycerin as an example).

Table 4 Mainstream smoke results of heat-not-burn cigarettes

6.3 Flue gas temperature analysis:

The NH1600 smoking set adaptability experimental device of Yizhong Group was used to detect the outlet smoke temperature. The heating temperature of the smoking set was set to 300°C. The Canadian deep inhalation (HCI) mode was adopted, with a puffing capacity of 55mL, a bell-shaped wave, puffing of 2s, and an interval of 30 seconds, take 7 puffs from each cigarette.

Table 5 Exit flue gas temperature (℃)

serial number first bite Second bite The third bite The fourth bite The fifth mouth The sixth mouth The seventh bite control sample 45 55 45 46 44 42 40 Sample 1 40 40 38 36 37 36 35 Sample 2 42 45 44 43 40 38 37 Sample 3 43 45 46 42 42 40 38 Sample 4 41 43 42 40 39 38 37 Sample 5 42 44 41 39 39 38 37

The flue gas temperature analysis results are shown in Table 5. The results show that compared with the control sample, after the smoke produced by the heat-not-burn cigarette passes through the aerosol cooling element prepared by the present invention, the smoke outlet temperature is lower, indicating that the aerosol cooling element prepared by the present invention can better reduce aerosols. temperature, the flue gas outlet temperature is more palatable.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention but not to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the present invention can still be modified. Modifications to the specific embodiments of the invention or equivalent substitutions of some of the technical features without departing from the spirit of the technical solution of the present invention shall be covered by the scope of the technical solution claimed by the present invention.

Claims (36)

1. An aerosol-cooling element, comprising:

a kernel; and

a heat conducting layer wrapped outside the inner core,

wherein:

the core comprises a phase change material therein,

the heat conduction layer has heat conductivity of 30-150W/m K, and is made of a heat conduction material, a plasticizer and a framework polymer, wherein the weight ratio of the heat conduction material to the framework polymer to the plasticizer in the heat conduction layer is 10-30:0.5-4:0.1-2, the heat conduction material is at least one selected from alpha-alumina, magnesia, zinc oxide or graphite, the framework polymer is at least one selected from carboxymethyl cellulose, hydroxypropyl methyl cellulose, polyethylene glycol or polyvinylpyrrolidone, the plasticizer is at least one selected from triethyl citrate, diethyl phthalate, polyethylene glycol 6000, tributyl citrate or dibutyl sebacate,

the preparation method of the aerosol-cooling element comprises the following steps:

1) Heating and melting the phase-change material to be liquid, and dripping the liquid phase-change material into a condensing medium to form a core;

2) Mixing heat conducting material, plasticizer and skeleton polymer in ethanol solution to form suspension, spraying the suspension onto the surface of the inner core, drying to form heat conducting layer on the surface of the inner core,

wherein:

the condensing medium is medium chain triglyceride, paraffin or vegetable oil,

the concentration of the heat conducting material in the suspension is 10-30wt%, the concentration of the skeleton polymer is 0.5-4wt%, the concentration of the plasticizer is 0.1-2wt%, and the balance is ethanol solution,

the ethanol solution is ethanol water solution with concentration of 20-80%.

2. The aerosol-cooling element of claim 1, wherein the method further comprises: mixing the flavoring material with ethanol to form flavoring solution, spraying the flavoring solution on the surface of the heat conducting layer, drying, and forming a flavoring layer on the surface of the heat conducting layer.

3. The aerosol-cooling element of claim 1, wherein the phase change material has a phase change temperature of 40-120 ℃.

4. The aerosol-cooling element of claim 1, wherein the phase change material is at least one selected from polyethylene glycol, magnesium sulfate heptahydrate, magnesium chloride hexahydrate, n-tetradecanoic acid, n-octadecanoic acid, sorbitol, xylitol, or erythritol.

5. The aerosol-cooling element of claim 1, wherein the phase change material is magnesium sulfate heptahydrate, or

The phase change material is polyethylene glycol, or

The phase change material is mixture of PEG1000, PEG2000 and PEG10000, or

The phase change material is a mixture of sorbitol, xylitol and erythritol, or

The phase change material is stearic acid.

6. The aerosol-cooling element of claim 5, wherein the phase change material is a mixture of PEG1000, PEG2000, PEG10000, and the mass ratio of PEG1000, PEG2000, PEG10000 is 1:3-5:4-6.

7. The aerosol-cooling element of claim 6, wherein the phase change material is a mixture of PEG1000, PEG2000, PEG10000, and the mass ratio of PEG1000, PEG2000, PEG10000 is 1:4:5.

8. The aerosol-cooling element of claim 5, wherein the phase change material is a mixture of sorbitol, xylitol, and erythritol, and the mass ratio of sorbitol, xylitol, erythritol is 2-4:5-7:1.

9. The aerosol-cooling element of claim 8, wherein the phase change material is a mixture of sorbitol, xylitol, and erythritol, and the mass ratio of sorbitol, xylitol, erythritol is 3:6:1.

10. The aerosol-cooling element of claim 1, wherein the weight ratio of thermally conductive material, backbone polymer, and plasticizer in the thermally conductive layer is 10-25:1-4:0.5-2.

11. The aerosol-cooling element of claim 1, wherein the thermally conductive material is a 500 mesh powdered substance.

12. The aerosol-cooling element of claim 1, wherein the thermally conductive layer is made of magnesium oxide, hydroxypropyl methylcellulose, diethyl phthalate.

13. The aerosol-cooling element of claim 12, wherein the mass ratio of magnesium oxide, hydroxypropyl methylcellulose, diethyl phthalate is 15-25:3-4:1-2.

14. The aerosol-cooling element of claim 13, wherein the mass ratio of magnesium oxide, hydroxypropyl methylcellulose, diethyl phthalate is 20:4:2.

15. The aerosol-cooling element of claim 1, wherein the thermally conductive layer is made of graphite, hydroxypropyl methylcellulose, triethyl citrate.

16. The aerosol-cooling element of claim 15, wherein the mass ratio of graphite, hydroxypropyl methylcellulose, and triethyl citrate is 10-20:1-3:0.5-1.5.

17. The aerosol-cooling element of claim 16, wherein the mass ratio of graphite, hydroxypropyl methylcellulose, triethyl citrate is 10:2:1.

18. The aerosol-cooling element of claim 1, wherein the thermally conductive layer is made of alpha-alumina, polyvinylpyrrolidone, tributyl citrate.

19. The aerosol-cooling element of claim 18, wherein the mass ratio of α -alumina, polyvinylpyrrolidone, tributyl citrate is 15-25:2-4:0.5-1.5.

20. The aerosol-cooling element of claim 19, wherein the mass ratio of α -alumina, polyvinylpyrrolidone, tributyl citrate is 20:3:1.

21. The aerosol-cooling element of claim 1, wherein the thermally conductive layer is made of zinc oxide, carboxymethyl cellulose, diethyl phthalate.

22. The aerosol-cooling element of claim 21, wherein the mass ratio of zinc oxide, carboxymethyl cellulose, diethyl phthalate is 20-25:1-3:0.5-1.5.

23. The aerosol-cooling element of claim 22, wherein the mass ratio of zinc oxide, carboxymethyl cellulose, diethyl phthalate is 25:2:1.

24. The aerosol-cooling element of claim 1, wherein the inner core is approximately spherical with a particle size of 2.0-3.8mm.

25. The aerosol-cooling element of claim 1, wherein the thermally conductive layer has a thickness of 1-2mm.

26. The aerosol-cooling element of claim 2, further comprising: and the flavoring layer is wrapped outside the heat conducting layer.

27. The aerosol-cooling element of claim 2 or 26, wherein the flavoring layer is made of at least one of the following flavoring materials selected from: eugenol, sweet fennel oil, cassia oil, anise oil, sweet orange oil, phenethyl alcohol and maltol.

28. The aerosol-cooling element of claim 26, wherein the fragrancing layer has a thickness of 0.8-1.2mm.

29. A method of making the aerosol-cooling element of any one of claims 1-28, comprising:

1) Heating and melting the phase-change material to be liquid, and dripping the liquid phase-change material into a condensing medium to form a core;

2) Placing a heat conducting material, a plasticizer and a framework polymer into an ethanol solution to be mixed to form a suspension, spraying the suspension on the surface of the inner core, and drying to form a heat conducting layer on the surface of the inner core;

wherein the condensing medium is medium chain triglyceride, paraffin or vegetable oil;

the concentration of the heat conducting material in the suspension is 10-20wt%, the concentration of the skeleton polymer is 0.5-4wt%, the concentration of the plasticizer is 0.1-2wt%, and the balance is ethanol solution;

the ethanol solution is ethanol water solution with concentration of 20-80%.

30. The method of claim 29, further comprising: mixing the flavoring material with ethanol to form flavoring solution, spraying the flavoring solution on the surface of the heat conducting layer, drying, and forming a flavoring layer on the surface of the heat conducting layer.

31. The method of claim 30, wherein the ethanol is an aqueous ethanol solution having a concentration of 70% -90%.

32. The method of claim 29, having one or more of the following features:

i) Dripping the liquid phase change material into a condensing medium by using dripping pill equipment;

ii) mixing a heat conducting material, a plasticizer and a skeleton polymer with an ethanol solution, and stirring by ultrasonic waves to form a suspension;

iii) Spraying the heat-conducting suspension on the surface of the inner core by using fluidized bed coating equipment or a coating pot;

iv) spraying the suspension of the heat conducting material onto the surface of the core with a fluid bed coating apparatus or pan at a temperature of 25-35 ℃.

33. The method of claim 30, wherein the flavoring solution is applied in an amount of 0.5 to 10wt% of the weight of the cooling element obtained in step 2).

34. Use of an aerosol-cooling element according to any one of claims 1 to 28 in the manufacture of a heated non-combustible tobacco product.

35. A heated non-combustible tobacco product comprising the aerosol-cooling element of any one of claims 1 to 28.

36. A heated non-combustion tobacco product as claimed in claim 35 which includes an aerosol-forming substrate for generating an aerosol, a hollow tubular support member, an aerosol-cooling member, and an aerosol-filtering member, wherein the aerosol-cooling member comprises the aerosol-cooling element of any of claims 1 to 28.