Cooling filter tip with filler of spiral structure

Abstract

The utility model discloses a cooling filter tip with a spiral structure filler, which comprises a cooling section, the cooling section comprises a cooling section shell, and the cooling section shell is filled with a cooling filler; the cooling filling body is a rope section formed by mutually winding at least two cooling material wires; the length direction of the cooling filling body is consistent with the flue gas circulation direction of the cooling section; and the cooling material filaments are made of a polylactic acid-polypropylene carbonate copolymer-polyurethane-polyethylene glycol block polymer material.

Description

Technical Field

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

[0002] There are many new tobacco products, including electronic cigarettes and heat-not-burn tobacco products, which mostly use electric heating to atomize tobacco oil or pyrolyze tobacco cartridges to produce smoke or fumes for consumers to inhale. Existing heat-not-burn tobacco products have the following defects in the actual smoking experience:

[0003] 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.

[0004] 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.

[0005] 3. Cooling polymer materials are generally placed in the cooling section of tobacco in the form of filling, and the amount of filamentary structure used is relatively large, resulting in greater smoke resistance during the smoking process, affecting the smoking experience.

[0006] 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

[0007] The utility model aims to provide a cooling filter with a spiral structure filler to achieve a better cooling effect and a better smoking experience.

[0008] The above purpose can be achieved by implementing the following technical solutions:

[0009] A cooling filter with a spiral structure filler, comprising a cooling section,

[0010] The cooling section includes a cooling section housing, and a cooling filler is filled in the cooling section housing;

[0011] The cooling filler is a rope segment formed by at least two cooling material filaments wound around each other; the length direction of the cooling filler is consistent with the flue gas flow direction of the cooling section;

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

[0013] 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.

[0014] Optionally, the diameter of the cooling material filament is 7 to 15 μm.

[0015] Optionally, the length of the cooling filler is the same as the length of the cooling section.

[0016] Optionally, the thickness of the cooling filler is 15 μm to 30 μm.

[0017] Optionally, the porosity of the cooling section is 10 - 90%.

[0018] Optionally, the cooling filler is a rope segment formed by two cooling material filaments wound around each other.

[0019] Optionally, both ends of the cooling section are respectively connected with a tow filter rod and a hollow tube.

[0020] The technical solution of the utility model has the following advantages:

[0021] The double - helix 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, realizes the rapid cooling effect, brings cool flue gas to the smokers, and optimizes and improves the smoking experience. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the cooling section of the embodiment of the present application.

[0023] Markings in the figure: 1, smoking section; 2, hollow tube; 3, cooling section; 4, tow filter rod section;

[0024] Figure 2 is the cooling material filament;

[0025] Figure 3 is the rope - segment - shaped cooling filler structure. Detailed Embodiments

[0026] The various exemplary embodiments of the present utility model will be described in detail below. This detailed description should not be construed as a limitation on the present utility model, but rather as a more detailed description of certain aspects, characteristics, and implementation schemes of the present utility model. It should be understood that the terms used in the present utility model are only for describing specific embodiments and are not intended to limit the present utility model.

[0027] 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. Intermediate values 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, are also included in the present utility model. The upper and lower limits of these smaller ranges can be independently included or excluded from the range.

[0028] 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.

[0029] Regarding the use of "comprising", "including", "having", "containing", etc. herein, they are all open-ended terms, meaning including but not limited to.

[0030] Example 1

[0031] The cooling material filaments are made of a poly(lactic acid)-poly(propylene carbonate diol)-polyurethane-polyethylene glycol block polymer cooling material, and the structure of the cooling material filaments is as follows:

[0032]

[0033] Among them, m is 1000; n is 1000; k is 20. This material is obtained by the method in CN 118255965 A.

[0034] 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, the copolymer cooling material is completely dissolved in dichloromethane, and then the dissolved solution is vacuum dried. After removing the dichloromethane solvent, a tobacco cooling material is obtained. Subsequently, a filamentous cooling material with a diameter of 10 μm is obtained through a wire drawing process, as Figure 2 shown. Then, a spiral rope segment structure is obtained by winding two filamentous cooling materials, as Figure 3As shown in the figure. Cut the filamentous cooling material and the spiral rope segment structure cooling filler into sizes equal to the length of the cooling section respectively, and then fill them into the cooling section shell. The length directions of the filamentous cooling material and the double - spiral structure cooling filler are consistent with the flue gas flow direction of the cooling section. The entire cooling section is evenly filled so that the cooling filler fills the space of the cooling section, and compaction is not carried out.

[0035] According to Figure 1 As shown in the figure, assemble the smoke - generating section 1, the hollow tube 2, the cooling section 3, and the tow filter rod section 4. Then conduct the experiment.

[0036] Test example

[0037] Assemble the heat - not - burning smoking device: It consists of two parts, a heat - not - burning smoking device and a heat - not - burning cigarette cartridge. The heat - not - burning cigarette cartridge is assembled by connecting and assembling the smoke - generating section, the hollow tube, the cooling section (the diameter of the hollow tube of the cooling section is 7.2 mm and the length is 10 mm, and it is filled with filamentous or double - spiral structure cooling materials), and the filter section, and one temperature - measuring point is set, as shown in the figure. Before the test, ensure that the smoke - generating section of the heat - not - burning cigarette to be tested can maintain stable smoke output.

[0038] Average flue gas inlet temperature suction test: Control the suction force to be 0.5 N, suck for 3 seconds every 5 seconds, so that the temperature peak reached by the tobacco is consistent. There are a total of 9 suction operations. 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 suction operations. The flue gas inlet temperature = the temperature - measuring point. The test results are shown in Table 1.

[0039] Cigarette suction resistance test:

[0040] 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, simply referred to as the draw resistance. Measuring this pressure can measure the draw resistance.

[0041] Use a cigarette draw resistance tester (Shanghai ChengSi Intelligent Technology Co., Ltd.) to test the suction resistance of the filled cigarettes. The test is carried out under the conditions of temperature 25 ± 2 °C and humidity 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 at both ends. Three 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.

[0042] Table 1: Related indicators of tobacco cooling polymer materials - double - spiral structure on tobacco smoking experience

[0043] Porosity Suction force / Pa Average flue gas inlet temperature / °C Filamentous 83.1％ 1350 38.2 Double helix structure 74.6％ 1260 36.7

[0044] It can be seen that by filling with a filling body made of a new type of cooling material in the shape of a double-helix rope segment, it has a better cooling effect and a better suction experience compared with the direct filling of conventional material filaments.

[0045] Obviously, the above embodiments are merely 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 modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the present utility model.

Claims

1. A cooling filter with a spiral structure filler, comprising a cooling section, characterized in that: The cooling section comprises a cooling section shell, and the cooling section shell is filled with a cooling filling body; The cooling filling body is a rope segment formed by at least two cooling material wires twisted together; the length direction of the cooling filling body is consistent with the smoke flow direction of the cooling segment; The cooling material filament is made of polylactic acid-polyisopropylene carbonate copolymer-polyurethane-polyethylene glycol block polymer material.

2. The cooling filter with spiral structure filler 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 spiral structure filler according to claim 1, characterized in that: The diameter of the cooling material wire is 7 to 15 um.

4. The cooling filter with spiral structure filler according to claim 1, characterized in that: The length of the cooling filling body is consistent with the length of the cooling section.

5. The cooling filter with spiral structure filler according to claim 1, characterized in that: The thickness of the cooling filling body is 15 μm to 30 μm.

6. The cooling filter with spiral structure filler according to claim 1, characterized in that: The porosity of the temperature-lowering section is 10-90%.

7. The cooling filter with spiral structure filler according to claim 1, characterized in that: The cooling filling body is a rope segment formed by two cooling material wires being wound around each other.

8. The cooling filter with spiral structure filler 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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