A cooling section for heating non-combustion smoking products and its preparation method

Abstract

This invention provides a cooling section for heating non-combustible smoking products and its preparation method, relating to the field of tobacco substitute technology. The cooling section (1) is made of a paper carrier (4) coated with a solid-liquid phase change heat-absorbing material. The paper carrier (4) is a multi-layer composite structure, including at least two overlapping grooved papers (5) and a solid-liquid phase change heat-absorbing material layer (6) coated on the inner side of any oppositely arranged grooved paper (5) or on the opposite surfaces of the two oppositely arranged grooved papers (5). By improving the materials and cooling structure used in the smoking product cooling section, the problem of liquefaction and volatilization of substances that occur when using gel or phase change materials for smoking product cooling is avoided in the prior art, while ensuring that the temperature of the smoke is effectively reduced to a suitable range.

Description

Technical Field

[0001] This invention relates to the field of tobacco substitute technology, specifically a cooling section of a novel heated non-combustible smoking product and its preparation method. Background Technology

[0002] With people's increasing desire for a healthy life and increasingly stringent tobacco control measures, "new types of cigarettes" designed with the concept of "heated non-combustible" have become an important direction for research and development of next-generation tobacco products and alternatives.

[0003] Heated tobacco products are generally made by physically separating the tobacco from the heat source. Based on different heating principles, they are categorized as follows: electrically heated (Philip Morris International's iQOS and British American Tobacco's GLO), fuel-heated (Reynolds' REVO), and chemically heated (physicochemical reaction-heated). Electric heating and fuel heating are currently the dominant technologies. However, both electrically and carbon-heated heated cigarettes suffer from excessively high smoke temperatures during inhalation. Furthermore, because the tobacco in heated cigarettes does not burn, the amount of smoke released is less than that of traditional cigarettes. If traditional techniques such as filtration and ventilation are used to reduce the smoke temperature, the amount of smoke produced will further decrease, severely impacting the smoking experience. Therefore, effectively reducing the smoke temperature is a crucial technology for heated cigarettes.

[0004] To address this issue, foreign companies such as Philip Morris International have adopted polylactic acid (PLA) film as a material for cooling flue gas and applied this technology to the design of carbon-heated cigarettes. While PLA film does have a cooling effect, it is prone to shrinkage when heated, and due to issues such as technological monopolies, it is highly detrimental to the research and development of related technologies and products in China. Therefore, many other technologies for cooling flue gas have emerged.

[0005] For example, CN201710191528.5 reports a cigarette cooling filter rod with added heat-absorbing gel. The heat-absorbing gel with a melting point of 40-65℃ is prepared and distributed in ordinary cigarette filter rods in granular or linear form. Alternatively, the heat-absorbing gel is directly coated on the surface of paper filter material in a certain amount and processed into a paper filter rod. The gel is melted by heating the mainstream smoke temperature. During the melting process, the gel absorbs heat from the smoke, thereby reducing the mainstream smoke temperature of cigarettes and improving the smoking comfort of cigarettes and heated non-combustible cigarettes.

[0006] The above technical solution has several drawbacks:

[0007] ① In the same heated tobacco product as this application, the above method coats the heat-absorbing gel onto the paper filter material to prepare a paper filter rod. However, the hardness of ordinary paper filter rods is reduced, and they are more likely to soften and collapse after being coated with gel, which is not conducive to the forming of paper filter rods.

[0008] ②The heat-absorbing gel in the above scheme becomes liquid after absorbing heat, and has high fluidity. Regardless of the amount of coating, it will block the filter material to some extent, causing increased suction resistance and affecting the suction effect. Therefore, only the amount of heat-absorbing gel can be controlled, which affects the upper and lower limits of cooling and ultimately reduces the overall applicability of the scheme.

[0009] ③ Heat-absorbing gel is essentially a means of adjusting the flavor of smoke and enhancing its aroma; however, because a small portion of it will vaporize and evaporate when heated, it will cause off-flavors in the smoke. From the perspective of cooling the smoke, this is harmful and will affect the smoking quality.

[0010] Regarding the two issues mentioned above, ① and ②, existing technologies have also provided solutions. The paper "Experimental Study on the Heat Storage Performance of Paraffin-Type Composite Phase Change Materials" (published in *Chinese Science and Technology Papers*, CAS, Peking University Core Journals, 2013, Vol. 9, pp. 935-939, 5 pages) and patent CN201410624331.2 both report the preparation of phase change materials with excellent heat transfer performance by combining composite phase change heat storage materials with materials with high adsorption and high thermal conductivity. Adding this phase change material to cigarette filter rods can effectively reduce the temperature of the smoke from cigarettes and also effectively solve the problems that arise after liquefaction. However, these solutions still have the problem of heat-absorbing material vaporizing and volatilizing, affecting the smoking quality. Summary of the Invention

[0011] This invention provides a cooling section for heating non-combustible inhaled products and its preparation method. By improving the materials and cooling structure used in the cooling section of the inhaled product, the invention avoids the problems of liquefaction and volatilization that occur when using gels or phase change materials for flue gas cooling in the prior art, while ensuring that the flue gas temperature is effectively reduced to a suitable range.

[0012] One of the objectives of this invention is to provide a cooling section for heating non-combustible aspirable substances, achieved through the following technical solution:

[0013] A cooling section 1 for a heated non-combustible inhaler is provided, wherein the cooling section 1 is disposed within the heated non-combustible inhaler and located between a smoke dispersion section 2 and a filtration section 3. The cooling section 1 is characterized in that it is made of a paper carrier 4 coated with a solid-liquid phase change heat-absorbing material; the paper carrier 4 is a multi-layer composite structure, comprising at least two overlapping layers of grooved paper 5, and a solid-liquid phase change heat-absorbing material layer 6 coated on the inner side of any one of the oppositely arranged grooved paper layers 5, or coated on the opposite surfaces of the two oppositely arranged grooved paper layers 5; the paper carrier 4 coated with the solid-liquid phase change heat-absorbing material is rolled into a cylindrical component with gaps and disposed at a conventional position within the heated non-combustible inhaler to constitute the cooling section 1.

[0014] Preferably, the solid-liquid phase change heat-absorbing material layer 6 is partially coated on the grooved paper 5, and is only coated on the grooved portion 501. The other parts of the two overlapping grooved paper layers 5 are not coated with the solid-liquid phase change heat-absorbing material layer 6, but are bonded together to form the bonding portion 502.

[0015] Preferably, the bonding portions 502 of the two overlapping grooved paper layers 5 are bonded together by adhesive or hot melt bonding.

[0016] Preferably, to prevent the heat-absorbing liquid solid-liquid phase change heat-absorbing material from leaking out of the grooved paper 5, an impermeable membrane 7 is provided between the grooved paper 5 of the paper carrier 4 and the solid-liquid phase change heat-absorbing material layer 6 to form a sealed structure for the solid-liquid phase change heat-absorbing material layer 6.

[0017] Preferably, to prevent the solid-liquid phase change heat-absorbing material from leaking and vaporizing during use and mixing into the mainstream flue gas, the cooling section 1 is segmented in the heated non-combustible inhaler; the segmented cooling section 1 is set in the heated non-combustible inhaler by placing two individual cooling sections 1 in direct contact or with a distance reserved between them.

[0018] Preferably, in the segmented cooling section 1, the paper carrier 4 used in the individual cooling section 1 near the heating end is a structure in which one or two layers of solid-liquid phase change heat-absorbing material are sandwiched between two layers of grooved paper 5 and then bonded together, or a structure in which solid-liquid phase change heat-absorbing material is wrapped with a waterproof membrane 7 and then sandwiched between two layers of grooved paper 5 and bonded together; the paper carrier 4 used in the cooling section 1 near the filtration section is a structure in which solid-liquid phase change heat-absorbing material is wrapped with a one-way membrane 8 and then sandwiched between two layers of grooved paper 5 and bonded together.

[0019] A second objective of this invention is to provide a method for preparing a cooling section for heating non-combustible aspirable substances, comprising the following steps:

[0020] I. Preparation of bamboo fiber grooved paper

[0021] ① First, the bamboo fiber is broken down and then the starch, sugar, and fat in the bamboo fiber are removed by boiling and steaming under high temperature and pressure.

[0022] ② Bamboo fiber grooved paper is produced by wet or dry papermaking. The specific parameters of the paper are the same as those of polylactic acid film.

[0023] II. Preparation of Paper Carriers

[0024] ① Coat a solid-liquid phase change heat-absorbing material layer 6 on any side of the grooved paper 5;

[0025] ② Prepare two grooved papers 5 with a solid-liquid phase change heat-absorbing material layer 6 partially coated, or one grooved paper 5 with a solid-liquid phase change heat-absorbing material layer 6 partially coated and the other without coated. Overlap the coated surfaces and apply an adhesive to the overlapping parts of the two papers except for the grooved parts. Then, laminate the two grooved papers 5 together and cut them along the longitudinal direction of the grooves and along the center line of the laminated parts to obtain the paper carrier 4 sheet.

[0026] III. Preparation of the cooling section

[0027] ① The paper carrier 4 sheets obtained in step 2 are rolled into a cylinder with air holes spirally distributed from the center outward on the radial cross section along the longitudinal axis of the groove.

[0028] Preferably, the solid-liquid phase change heat-absorbing material is edible wax.

[0029] Preferably, the solid-liquid phase change heat-absorbing material is a natural edible wax, such as sucrose wax or beeswax.

[0030] Preferably, the adhesive is a splicing paper adhesive.

[0031] Preferably, in the preparation of the paper carrier 4 in step two, before coating the solid-liquid phase change heat-absorbing material layer 6 on the grooved paper 5, a layer of impermeable membrane 7 or one-way membrane 8 is pre-set on the same side of the grooved paper 5, and then the solid-liquid phase change heat-absorbing material is coated.

[0032] The one-way membrane 8 is a polymer one-way breathable membrane, such as a PTFE membrane.

[0033] After the cooling section 1 is set in the heated non-combustible inhaler, the flue gas generated by the heating section is dispersed by the dispersion section and enters the cooling section 1, which is composed of composite paper carrier 4. The heat brought by the flue gas comes into contact with the edible wax wrapped in the grooved paper 5. Since the temperature of the flue gas is much higher than the melting temperature of edible wax and its mixture of 50-70°C, as the edible wax in the cooling section 1 gradually melts, it can absorb a large amount of heat from the flue gas and reduce the temperature of the flue gas. The melted edible wax will not flow around or leak and pollute under the protection of the impermeable membrane 7. At the same time, in order to prevent leakage, this application also sets the cooling section 1 in segments. In particular, a one-way membrane 8 is added to the rear single cooling section 1, which can collect the small amount of gaseous edible wax that is vaporized due to leakage and prevent it from mixing into the mainstream flue gas. At the same time, the rear single cooling section 1 can also further reduce the temperature of the flue gas.

[0034] The cooling section 1 of this invention uses a paper carrier 4 made of grooved paper 5 as raw material, which is rolled and formed. The production process is simple and easy to operate. The cooling section 1 produced has spirally distributed vent holes on its radial cross section. The high-temperature smoke can fully contact the solid-liquid phase change heat-absorbing material set in the paper carrier 4 and carry out sufficient heat exchange, thereby reducing the temperature of the smoke and significantly reducing the burning and irritating sensation in the mouth after smoking cigarettes. This invention uses non-toxic edible wax as the heat-absorbing material, which has the advantage of high safety. At the same time, in order to further reduce the risk, a waterproof membrane 7 is set to wrap the edible wax to prevent leakage after liquefaction. In addition, to prevent trace amounts of edible wax from being vaporized and mixed into the smoke, a segmented cooling section 1 is specially set. The cooling section 1 at the rear end, while having the same cooling effect, is equipped with a one-way membrane 8 to wrap the edible wax, which can absorb the gaseous edible wax mixed into the smoke after vaporization, so as to maximize the safety of use and the quality of smoke inhalation. Attached Figure Description

[0035] Figure 1 This is a schematic diagram showing the location of the cooling section in the heated non-combustible aspirate as described in Example 1.

[0036] Figure 2 This is a cross-sectional view of the paper carrier described in Example 1.

[0037] Figure 3 This is a top view of the grooved paper.

[0038] Figure 4 This is a cross-sectional view of the grooved paper.

[0039] Figure 5 This is a cross-sectional view of the paper carrier described in Example 2.

[0040] Figure 6 This is a cross-sectional view of the paper carrier described in Example 3.

[0041] Figure 7 This is a top view of the grooved paper described in Example 3.

[0042] Figure 8 This is a cross-sectional view of the paper carrier of the unit cooling section near the flue gas dispersion section as described in Example 4.

[0043] Figure 9 This is a cross-sectional view of the paper carrier of the monomer cooling section near the filter section as described in Example 4.

[0044] Figure 10 This is a schematic diagram showing the location of the cooling section in the heated non-combustible aspirate as described in Example 4.

[0045] Figure 11 This is a radial cross-sectional view of the cooling section.

[0046] In the diagram, the components are: 1. Cooling section; 2. Flue gas dispersion section; 3. Filtration section; 4. Paper carrier; 5. Grooved paper; 6. Solid-liquid phase change heat absorption material layer; 7. Impermeable membrane; 8. One-way membrane. Detailed Implementation

[0047] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0048] Example 1

[0049] like Figure 1 , 2 As shown in Figures 3, 4, and 11, the cooling section 1 for a heated non-combustible inhaler described in this embodiment is disposed within the heated non-combustible inhaler, located between the smoke dispersion section 2 and the filtration section 3. The cooling section 1 is made of a paper carrier 4 coated with a solid-liquid phase change heat-absorbing material. The paper carrier 4 is a multi-layer composite structure, including two overlapping layers of grooved paper 5, and a solid-liquid phase change heat-absorbing material layer 6 coated on the inner side of any oppositely disposed layer of grooved paper 5. The paper carrier 4 coated with the solid-liquid phase change heat-absorbing material is rolled into a cylindrical component with gaps and disposed at a conventional position within the heated non-combustible inhaler to form the cooling section 1.

[0050] Example 2

[0051] like Figure 3 , 4 As shown in Figures 5 and 11, the cooling section for heating non-combustible aspirable products described in this embodiment has a structure that is basically the same as that in Embodiment 1. The difference is that the paper carrier 4 is a multi-layer composite structure, including two layers of grooved paper 5 that are stacked, and solid-liquid phase change heat-absorbing material layers 6 that are coated on the opposite surfaces of the two layers of grooved paper 5 respectively.

[0052] Example 3

[0053] like Figure 6 , 7 As shown in Figure 11, the cooling section for heating non-combustible suction products described in this embodiment has a structure that is basically the same as that in Embodiment 1. The difference is that the solid-liquid phase change heat-absorbing material layer 6 is partially coated on the grooved paper 5, and is only coated on the grooved portion 501. The other parts of the two overlapping grooved paper layers 5 are not coated with the solid-liquid phase change heat-absorbing material layer 6, but are bonded together to form a bonding portion 502. The bonding portion 502 is bonded together by adhesive or hot melt bonding.

[0054] Example 4

[0055] like Figure 8 , 9As shown in Figures 10 and 11, the cooling section for heating non-combustible aspirable products described in this embodiment has a structure that is basically the same as that in Embodiment 1. The difference is that a waterproof membrane 7 is provided between the grooved paper 5 of the paper carrier 4 and the solid-liquid phase change heat-absorbing material layer 6 to form a sealed and encapsulated structure for the solid-liquid phase change heat-absorbing material layer 6.

[0056] The solid-liquid phase change heat-absorbing material leaks and is heated and vaporized, mixing into the mainstream flue gas. The cooling section 1 is set in segments in the heated non-combustible suction product. The segmented cooling section 1 is set in the heated non-combustible suction product by placing two individual cooling sections 1 in direct contact or leaving a distance between them.

[0057] In the segmented cooling section 1, the paper carrier 4 used in the individual cooling section 1 near the heating end is a structure in which the solid-liquid phase change heat-absorbing material is wrapped with a waterproof membrane 7 and then sandwiched and bonded by two layers of grooved paper 5; the paper carrier 4 used in the cooling section 1 near the filtration section is a structure in which the solid-liquid phase change heat-absorbing material is wrapped with a one-way membrane 8 and then sandwiched and bonded by two layers of grooved paper 5.

[0058] Example 5

[0059] A method for preparing a cooling section for heating non-combustible inhaled substances, comprising the following steps:

[0060] I. Preparation of bamboo fiber grooved paper

[0061] ① First, the bamboo fiber is broken down and then the starch, sugar, and fat in the bamboo fiber are removed by boiling and steaming under high temperature and pressure.

[0062] ② Bamboo fiber grooved paper is produced by wet or dry papermaking. The specific parameters of the paper are the same as those of polylactic acid film.

[0063] II. Preparation of Paper Carriers

[0064] ① Coat any side of the grooved paper 5 with beeswax;

[0065] ② Prepare two grooved papers 5 partially coated with beeswax, overlap the coated surfaces, and apply adhesive to the overlapping parts of the two papers except for the grooves. Then, laminate the two grooved papers 5 together and cut them along the longitudinal direction of the grooves and the center line of the laminated part to obtain the paper carrier 4 sheet.

[0066] III. Preparation of the cooling section

[0067] ① The paper carrier 4 sheets obtained in step 2 are rolled into a cylinder with air holes spirally distributed from the center outward on the radial cross section along the longitudinal axis of the groove.

[0068] Example 6

[0069] A method for preparing a cooling section for heating non-combustible aspirable products, the steps of which are basically the same as those in Example 5, the difference being that, in the preparation of the paper carrier 4 in step two of Example 5, before coating the solid-liquid phase change heat-absorbing material layer 6 on the grooved paper 5, a layer of impermeable membrane 7 or one-way membrane 8 is pre-set on the same side of the grooved paper 5, and then the solid-liquid phase change heat-absorbing material is coated; the one-way membrane 8 is a PTFE membrane.

Claims

1. A cooling section (1) for a heated non-combustible inhalant, wherein the cooling section (1) is disposed in the heated non-combustible inhalant and located between a smoke dispersion section (2) and a filtration section (3), characterized in that, The cooling section (1) is made of a paper carrier (4) coated with a solid-liquid phase change heat-absorbing material. The paper carrier (4) is a multi-layer composite structure, including at least two layers of grooved paper (5) that are stacked, and a solid-liquid phase change heat-absorbing material layer (6) coated on the inner side of any one of the grooved paper (5) that is stacked opposite each other, or coated on the opposite sides of the two grooved paper (5) that are stacked opposite each other. The paper carrier (4) coated with the solid-liquid phase change heat-absorbing material is rolled into a cylindrical component with gaps and placed in a conventional position inside the heated non-combustible suction product to form the cooling section (1). In addition, this cooling phase is carried out according to the following steps: I. Preparation of bamboo fiber grooved paper ① First, the bamboo fiber is broken down and then the starch, sugar, and fat in the bamboo fiber are removed by boiling and steaming under high temperature and pressure. ② Bamboo fiber grooved paper is produced by wet or dry papermaking. II. Preparation of Paper Carriers ① Coat a solid-liquid phase change heat-absorbing material layer (6), i.e., food-grade beeswax, on any side of the grooved paper (5); ② Prepare two grooved papers (5) partially coated with solid-liquid phase change heat-absorbing material layer (6), or one grooved paper (5) partially coated and one uncoated with solid-liquid phase change heat-absorbing material layer (6). Overlap the coated surfaces and apply adhesive to the overlapping parts of the two papers except for the grooved parts. Then, combine the two grooved papers (5) and cut them along the longitudinal direction of the grooves and along the center line of the composite part to obtain a paper carrier (4) sheet. III. Preparation of the cooling section ① The paper carrier (4) sheet obtained in step 2 is rolled along the longitudinal direction of the groove into a cylinder with air holes spirally distributed from the center outward on the radial cross section.

2. The cooling section for heating a non-combustible inhalable substance according to claim 1, characterized in that, The solid-liquid phase change heat-absorbing material layer (6) is partially coated on the grooved paper (5), and is only coated on the grooved part (501). The other parts of the two overlapping grooved paper (5) are not coated with the solid-liquid phase change heat-absorbing material layer (6), but are bonded together to form the bonding part (502).

3. The cooling section for heating a non-combustible inhalable substance according to claim 2, characterized in that, The bonding portion (502) of the two overlapping grooved paper layers (5) is bonded together by adhesive or hot melt bonding.

4. The cooling section for heating a non-combustible aspirable substance according to claim 1, characterized in that, An impermeable membrane (7) is provided between the grooved paper (5) of the paper carrier (4) and the solid-liquid phase change heat-absorbing material layer (6) to form a sealed structure for the solid-liquid phase change heat-absorbing material layer (6).

5. A cooling section for heating a non-combustible inhalable substance according to claim 1, characterized in that, The cooling section (1) is set in segments in the heated non-combustible suction product; the segmented cooling section (1) is set in the heated non-combustible suction product by placing two individual cooling sections (1) in direct contact or leaving a distance between them.

6. A cooling section for heating a non-combustible aspirable substance according to claim 5, characterized in that, In the segmented cooling section (1), the paper carrier (4) used in the individual cooling section (1) near the heating end is a structure in which one or two layers of solid-liquid phase change heat-absorbing material are sandwiched between two layers of grooved paper (5) and then bonded together, or a structure in which solid-liquid phase change heat-absorbing material is wrapped with a waterproof membrane (7) and then sandwiched between two layers of grooved paper (5) and bonded together; the paper carrier (4) used in the cooling section (1) near the filtration section is a structure in which solid-liquid phase change heat-absorbing material is wrapped with a one-way membrane (8) and then sandwiched between two layers of grooved paper (5) and bonded together.

7. A cooling section for heating a non-combustible inhalable substance according to claim 3, characterized in that, The adhesive used is a splicing paper adhesive.

8. A cooling section for heating a non-combustible inhalable substance according to claim 1, characterized in that, In the preparation of the paper carrier (4), before coating the solid-liquid phase change heat-absorbing material layer (6) on the grooved paper (5), a layer of anti-seepage membrane (7) or one-way membrane (8) is pre-set on the same side of the grooved paper (5), and then the solid-liquid phase change heat-absorbing material is coated; the one-way membrane (8) is a PTFE membrane.

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