Cooling filter tip with folded sheet structure

Abstract

The utility model discloses a cooling filter tip with a folded sheet structure, which comprises a cooling section, the cooling section comprises a cooling section shell, and a cooling sheet is arranged in the cooling section shell; the cooling sheet is made of a polylactic acid-poly (isopropyl carbonate) copolymer-polyurethane-polyethylene glycol block polymer material; the cooling fin is provided with a plurality of bending parts, and the bending directions of the adjacent bending parts are opposite; and a channel penetrating through the cooling section is formed between each bent part of the cooling sheet and the cooling section shell.

Description

Technical Field

[0001] The utility model relates to the field of tobacco, in particular to a cooling filter with a folding sheet structure. Background Art

[0002] There are many new tobacco products currently available, among which electronic cigarettes and heated non-combustible tobacco products mostly use electric heating to atomize tobacco oil or pyrolysis cartridges to produce smoke or fumes for consumers to inhale.

[0003] Existing heat-not-burn tobacco products have the following defects in actual smoking experience:

[0004] 1. The temperature of the high-temperature atomized smoke entering the oral cavity through the filter segment is higher than the burning temperature of ordinary cigarettes, which will cause the inlet smoke to be too hot and affect the smoking experience and feeling.

[0005] 2. In the prior art, polylactic acid is generally used as a cooling material for cigarette filters to achieve cooling treatment of high-temperature smoke. For example, polylactic acid tows, polylactic acid sheets and other structural forms are used, which have high costs. In addition, the phase change temperature of polylactic acid is higher than 180°C, and the phase change enthalpy is around 40 J / g, resulting in a large amount of polylactic acid. In addition, polylactic acid also has defects such as heat resistance, which limits the application and further processing of polylactic acid ultra-thin films.

[0006] 3. Cooling polymer materials are generally placed in the cooling section of tobacco in the form of filling, which results in greater smoke resistance during the smoking process, affecting the smoking experience.

[0007] The patent with application number CN 118255965 A proposes a new type of polylactic acid-polyisopropylene carbonate copolymer-polyurethane-polyethylene glycol block polymer material. The copolymer cooling material has a high phase change enthalpy and a small contact angle, which is conducive to absorbing the heat of the smoke and making the cooling effect of the high-temperature smoke obvious; at the same time, the thermal decomposition temperature of the copolymer cooling material is higher than 250°C, and it has strong heat resistance. However, there is no special cooling section structure designed for the new cooling material. Therefore, it is necessary to design an effective cooling polymer material structure to make full use of the limited space of the cooling section in the tobacco product, to solve the adverse effect of smoke overheating on the smoking to the greatest extent, and the structure will not hinder the smoke circulation and reduce the smoking experience. Utility Model Content

[0008] The utility model aims to provide a cooling filter with a folded sheet structure, so as to achieve a better cooling effect and a better smoking experience.

[0009] The above purpose can be achieved by implementing the following technical solutions:

[0010] A cooling filter with a folded sheet structure, comprising a cooling section:

[0011] The cooling section includes a cooling section housing, and cooling fins are provided inside the cooling section housing.

[0012] The cooling fins are made of a polylactic acid - poly (isopropyl carbonate glycol) copolymer - polyurethane - polyethylene glycol block polymer material.

[0013] The cooling fins have a plurality of bending portions, and the bending directions of adjacent bending portions are opposite; through channels that penetrate the cooling section are formed between each bending portion of the cooling fins and the cooling section housing.

[0014] Optionally, the diameter of the cooling section is 5 mm to 8 mm, and the length of the cooling section is 8 mm to 18 mm.

[0015] Optionally, the thickness of the folding fins is 5 μm to 20 μm.

[0016] Optionally, the length of the cooling fins is consistent with the length of the cooling section.

[0017] Optionally, the width of the cooling fins is 20 - 50 mm.

[0018] Optionally, the spacing between adjacent bending portions of the cooling fins is equal.

[0019] Optionally, the cooling fins have 2 to 8 bending portions.

[0020] Optionally, the cooling fins have 4 bending portions.

[0021] Optionally, a tow filter rod and a hollow tube are respectively connected to both ends of the cooling section.

[0022] The utility model technical solution has the following advantages:

[0023] In the utility model, the folding fin structure of the polymer material reduces the flow resistance of the flue gas in the cooling section, increases the contact area between the high-temperature flue gas and the cooling material, makes full use of the limited space to increase the heat exchange area, realizes a rapid cooling effect, brings a cool flue gas to the puffing personnel, and optimizes and improves the puffing experience. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the cooling section of the embodiment of the present application.

[0025] Markings in the figure: 1, smoking section; 2, hollow tube; 3, cooling section; 4, tow filter rod section.

[0026] Figure 2 It is a schematic diagram of the folded cooling fins. Among them, A is a cooling fin with 2 bending portions, B is a cooling fin with 4 bending portions, and C is a cooling fin with 8 bending portions.

[0027] Figure 3Schematic diagram of the assembly of the cooling sheet. Detailed implementation mode

[0028] Now, various exemplary implementation modes of the present utility model will be described in detail. This detailed description should not be considered as a limitation of the present utility model, but should be understood as a more detailed description of certain aspects, characteristics, and implementation schemes of the present utility model. It should be understood that the terms described in the present utility model are only for describing specific implementation modes and are not used to limit the present utility model.

[0029] In addition, for the numerical ranges in the present utility model, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Any intermediate value within any stated value or stated range, as well as each smaller range between any other stated value or intermediate value within the stated range, is also included in the present utility model. The upper and lower limits of these smaller ranges may be independently included or excluded from the range.

[0030] Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present utility model pertains. Although the present utility model only describes preferred methods and materials, any methods and materials similar or equivalent to those described herein can also be used in the implementation or testing of the present utility model.

[0031] Regarding the "comprising", "including", "having", "containing", etc. used herein, they are all open-ended terms, that is, they are intended to mean including but not limited to.

[0032] Example 1

[0033] The structure of the poly(lactic acid)-poly(isopropyl carbonate glycol)-polyurethane-polyethylene glycol block polymer cooling material used in this example is as follows:

[0034]

[0035] Among them, m is 1000; n is 1000; k is 20. This material is obtained by the method in CN 118255965 A.

[0036] The preparation method of the cooling sheet is as follows: Put the copolymer cooling material into a flask, add dichloromethane, and the mass ratio of the copolymer cooling material to dichloromethane is 1:20. At 40 °C, completely dissolve the copolymer cooling material in dichloromethane, and then spin-coat the dissolved solution into a uniform film with a thickness of 10 μm, and dry it in vacuum. After removing the dichloromethane solvent, a tobacco cooling material is obtained, and then it is cut into a square film with a width of 4 cm and a length of 5 cm, as Figure 2As shown in the figure, the film is bent 2 times, 4 times, and 8 times respectively, and the bending directions of adjacent bending parts are opposite and the spacing is equal, obtaining a cooling sheet bent 2 times, a cooling sheet bent 4 times, and a cooling sheet bent 8 times. Then, the above-mentioned cooling sheets are respectively inserted into the cooling section housing. As Figure 3 shown, channels 32 penetrating the cooling section are formed between the respective bending parts of the cooling sheet 31 and the cooling section housing.

[0037] According to Figure 1 shown, the smoke generating section 1, the hollow tube 2, the cooling section 3, and the tow filter rod section 4 are assembled. Then, tests are carried out.

[0038] Comparative Example

[0039] The cooling sheet folded 4 times in the embodiment is replaced with a polylactic acid sheet of the same size.

[0040] Test Example

[0041] The heat-not-burn cigarette cartridge is assembled by connecting and assembling the smoke generating section, the cooling section, the hollow tube (the inner diameter of the hollow tube of the cooling section is 7.2 mm and the length is 10 mm, and different folded sheet structures of cooling materials are filled therein), and the filter section, and one temperature measurement point is set, as shown in the figure. Before the test, ensure that the smoke generating section of the heat-not-burn cigarette to be tested can maintain stable smoke output.

[0042] Average flue gas inlet temperature suction test: Control the suction force to be 0.5 N, suction for 3 seconds every 5 seconds, so that the temperature peak reached by the tobacco is consistent. A total of 9 suction operations are carried out. Remove the experimental data of the first three and the last three times, and statistically analyze the experimental data of the 4th, 5th, and 6th suctions. The flue gas inlet temperature = the temperature measurement point. The test results are shown in Table 1.

[0043] Cigarette suction resistance test:

[0044] When a fixed flow rate (standard is 17.5 ml / s) of air is inhaled by simulating the smoking action of a person on a cigarette, a certain vacuum pressure will be generated at the inhalation end of the cigarette at this time. This pressure is the inhalation resistance, referred to as the draw resistance. Measuring this pressure can measure the draw resistance.

[0045] Use a cigarette draw resistance tester (Shanghai ChengSi Intelligent Technology Co., Ltd.) to test the draw resistance of the filled cigarette. The test is carried out under the conditions of a temperature of 25 ± 2 °C and a humidity of 50 ± 2%. Air passes through both ends of the cigarette at a constant rate (17.5 ml / s), and a standard pressure gauge is used to measure the pressure difference between the two ends. 3 cigarettes are tested for each group of samples, and the average value is taken. The test standards are as follows: ISO6565, GB / T 22838.5, GB / T 18767.

[0046] Table 1: Related indexes of tobacco cooling polymer materials - folded sheet structure on tobacco smoking experience

[0047] Suction strength / Pa Average flue gas inlet temperature / °C Folded 2 times 1120 41.3 Folded 4 times 1200 37.4 Folded 8 times 1370 36.9 Control example 1275 40.4

[0048] Therefore, the folded structure of the polymer material in the present utility model reduces the flow resistance of the flue gas in the cooling section, increases the contact area between the high-temperature flue gas and the cooling material, makes full use of the limited space to increase the heat exchange area, achieves a rapid cooling effect, brings cool flue gas to the puffing personnel, and optimizes and improves the puffing experience. It can be seen from the above test results that the best effect can be obtained by folding 4 times.

[0049] Obviously, the above embodiments are only examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present utility model.

Claims

1. A cooling filter with a flap structure, comprising a cooling section, characterized in that: The cooling section comprises a cooling section shell, and a cooling sheet is arranged inside the cooling section shell; The cooling sheet is made of polylactic acid-polyisopropylene carbonate copolymer-polyurethane-polyethylene glycol block polymer material; the cooling sheet has a plurality of bending parts, and the bending directions of adjacent bending parts are opposite; a channel penetrating the cooling section is formed between each bending part of the cooling sheet and the cooling section shell.

2. The cooling filter with flap structure according to claim 1, characterized in that: The diameter of the cooling section is 5 mm to 8 mm, and the length of the cooling section is 8 mm to 18 mm.

3. The cooling filter with flap structure according to claim 1, characterized in that: The thickness of the folding sheet is 5 μm to 20 μm.

4. The cooling filter with a flap structure according to claim 1, characterized in that: The length of the cooling sheet is consistent with the length of the cooling section.

5. The cooling filter with a flap structure according to claim 1, characterized in that: The unfolded width of the cooling sheet is 20-50mm.

6. The cooling filter with a flap structure according to claim 1, characterized in that: The spacings between adjacent bending parts of the cooling plate are equal.

7. The cooling filter with a flap structure according to claim 1, characterized in that: The cooling sheet has 2 to 8 bending parts.

8. The cooling filter with a flap structure according to claim 1, characterized in that: The cooling sheet has four bending parts.

9. The cooling filter with a flap structure according to claim 1, characterized in that: The two ends of the temperature reduction section are respectively connected with a tow filter rod and a hollow tube.

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