Multi-layer variable-pressure composite filter stick capable of improving tar adsorption capacity

Abstract

The invention belongs to the technical field of cigarette auxiliary materials, and relates to a multi-layer variable pressure composite filter stick capable of improving tar adsorption capacity, the multi-layer variable pressure composite filter stick is composed of three sections of base sticks which are connected end to end and wrapped by molding paper, a near-lip section is a smoke blending section, a near-cut tobacco section is a smoke cooling section, and a middle section is a tar adsorption section, the suction resistance value of the smoke blending section and the smoke cooling section is 25-250 Pa higher than that of the tar adsorption section, the cross section of the tar adsorption section is of an annular multi-layer structure with an outer layer wrapping an inner layer, the density of each layer is increased layer by layer from inside to outside, the suction resistance increase value of the outer layer to the inner layer is 10-35 Pa, and the ratio of the diameter of the inner layer to the diameter of the composite filter stick is 1: (1.5-3). According to the composite filter stick disclosed by the invention, smoke is gathered in a low-pressure high-adsorption area in the center of the filter stick, the adsorption efficiency of the filter stick is improved by utilizing an efficient adsorption material, and the tar content in the smoke entering an oral cavity is greatly reduced; in addition, a smoke blending material is added to the near-lip section, smoke can be effectively blended, and the smoking comfort is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of cigarette auxiliary materials, and relates to filter rods, specifically a multi-layer pressure-switching composite filter rod that can improve tar adsorption capacity. Background Technology

[0002] When a cigarette is lit, the tobacco smolders. Under oxygen-deficient conditions, the organic matter in the tobacco undergoes incomplete combustion, producing a large amount of smoke. Tar, containing all substances except nicotine and moisture, is an extremely complex mixture of numerous hydrocarbons and their oxides, sulfides, and nitrogen compounds, as well as phenols, fumaric acid, benzo[a]pyrene, cadmium, arsenic, β-naphthalene, amines, nitrosamines, and radioactive isotopes. This means that the vast majority of harmful substances in cigarette smoke are contained in tar. Filtering or adsorbing tar from cigarette smoke can reduce its harm to smokers.

[0003] Currently, the most commonly used tar-reducing filter rods are cellulose paper grooved filter rods. Although they adsorb tar better than ordinary filter rods, the cellulose paper also adsorbs a large amount of moisture in the smoke, making the smoke too dry and resulting in a poor smoking experience.

[0004] The multi-layer pressure-switching composite filter rod disclosed in this invention, which enhances tar adsorption capacity, improves tar reduction while maintaining a smooth, moist feel by employing innovative filter rod structure design and functional materials. Furthermore, the application of functional materials also enhances the filter rod's ability to blend and reduce flue gas temperature. Summary of the Invention

[0005] The purpose of this invention is to disclose a multi-layer pressure-switching composite filter rod that can improve the tar adsorption capacity. It not only improves the tar reduction capacity of the filter rod, but also maintains the smoothness of the flue gas, and has the functions of blending the flue gas and reducing the flue gas temperature.

[0006] Technical solution

[0007] A multi-layer pressure-switching composite filter rod that can improve tar adsorption capacity consists of three connected base rods wrapped in molding paper. The near-lip section is a flue gas blending section, the near-tobacco section is a flue gas cooling section, and the middle section is a tar adsorption section. The adsorption resistance of the flue gas blending section and the flue gas cooling section is 25-250 Pa higher than that of the tar adsorption section. The cross-section of the tar adsorption section is a ring-shaped multi-layer structure with an outer layer covering an inner layer. The density of each layer increases from the inside out, so its adsorption resistance also increases from the inside out. The adsorption resistance of the outer layer is 10-35 Pa higher than that of the inner layer. The diameter ratio of the inner layer to the diameter of the composite filter rod is 1:1.5-3, preferably 1:2, which is the high-efficiency tar adsorption zone.

[0008] In a preferred embodiment of the present invention, the base rods may be of equal or unequal length, preferably of equal length, and their length is 3 to 20 mm.

[0009] In a preferred embodiment of the present invention, the outer layer is a cellulose acetate tow, a polypropylene fiber tow, a polylactic acid tow, or a polylactic acid-PET composite fiber tow, preferably a cellulose acetate tow or a polylactic acid tow.

[0010] In a preferred embodiment of the present invention, the inner layer is a carbon-containing polylactic acid filament bundle or a carbon-containing polylactic acid nonwoven fabric, wherein the activated carbon plays a role in the efficient adsorption of tar.

[0011] In a preferred embodiment of the present invention, the flue gas cooling section is a polylactic acid membrane, polylactic acid nonwoven fabric, cooling dust-free paper, or high-permeability paper coated with a low-temperature phase change material, preferably polylactic acid nonwoven fabric or high-permeability paper coated with a low-temperature phase change material.

[0012] In a preferred embodiment of the present invention, the flue gas cooling section may also be a polylactic acid filament bundle or a polylactic acid-PET composite fiber bundle, preferably a polylactic acid filament bundle.

[0013] In a preferred embodiment of the present invention, the flue gas blending section is composed of cellulose acetate tow and a flue gas blending material, wherein the flue gas blending material is a flavoring agent, fragrance thread, flavor capsule, or cellulose paper.

[0014] When the smoke moves through the filter rod, it will automatically converge towards the area with low resistance, namely the tar-efficient adsorption zone in this invention. A large amount of tar in the smoke is adsorbed, thereby reducing the amount of tar inhaled into the smoker's mouth.

[0015] Beneficial effects

[0016] The multi-layer pressure-switching composite filter rod disclosed in this invention can improve the tar adsorption capacity. It concentrates the smoke in the low-pressure, high-adsorption area at the center of the filter rod and improves the adsorption efficiency of the filter rod by using high-efficiency adsorption materials, thereby significantly reducing the tar content in the smoke entering the mouth. In addition, the smoke-blending material added near the lips can effectively blend the smoke and improve the smoking comfort. Attached Figure Description

[0017] Figure 1 A cross-sectional diagram of a multi-layer pressure-switching composite filter rod that can improve tar adsorption capacity. The names of each component are: 1-smoke blending section (near the lip), 2-outer layer, 3-inner layer, 4-smoke cooling section (near the tobacco). Detailed Implementation

[0018] The present invention will be described in detail below with reference to embodiments, so that those skilled in the art can better understand the present invention, but the present invention is not limited to the following embodiments.

[0019] Example 1

[0020] A multi-layer pressure-switching composite filter rod that can improve tar adsorption capacity is specifically a composite filter rod consisting of a capsule-carbon-containing polylactic acid filament bundle-polylactic acid membrane. Each of the three filter rod sections is 10 mm in length. The flue gas blending section is a capsule-containing cellulose acetate filter rod, the flue gas cooling section is a polylactic acid membrane filter rod, and the inner layer 3 of the tar adsorption functional section is a carbon-containing polylactic acid filament bundle filter rod, while the outer layer 2 is a cellulose acetate filament bundle layer. The absorption resistance increase of the outer layer 2 compared to the inner layer 3 is 10 Pa, and the ratio of the inner layer 3 to the filter rod diameter is 1:1.5.

[0021] Example 2

[0022] A multi-layer pressure-switching composite filter rod that can improve tar adsorption capacity is specifically a composite filter rod consisting of a capsule-carbon-containing polylactic acid filament bundle-polylactic acid membrane. Each of the three filter rod sections is 10 mm in length. The flue gas blending section is a capsule-carbon-containing cellulose acetate filter rod, the flue gas cooling section is a polylactic acid membrane filter rod, and the inner layer 3 of the tar adsorption functional section is a carbon-containing polylactic acid filament bundle filter rod, while the outer layer 2 is a cellulose acetate filament bundle layer. The absorption resistance increase of the outer layer 2 compared to the inner layer 3 is 15 Pa, and the ratio of the inner layer 3 to the filter rod diameter is 1:2.

[0023] Example 3

[0024] A multi-layer pressure-switching composite filter rod that can improve tar adsorption capacity is specifically a grooved-carbon polylactic acid membrane-polylactic acid filament composite filter rod. The cooling section and flue gas blending section are 7 mm long, the tar adsorption section is 14 mm long, the flue gas blending section filter rod is a grooved cellulose acetate filter rod, the flue gas cooling section filter rod is a polylactic acid filament filter rod, the inner layer 3 of the tar adsorption section is a carbon-containing polylactic acid membrane filter rod, the outer layer 2 is a cellulose acetate filament layer, the absorption resistance increase of the outer layer 2 compared to the inner layer 3 is 35 Pa, and the ratio of the inner layer 3 to the filter rod diameter is 1:1.5.

[0025] Example 4

[0026] A multi-layer pressure-switching composite filter rod that can improve tar adsorption capacity is specifically a composite filter rod consisting of a fragrance thread-carbon-containing polylactic acid (PLA) filament bundle-PLA membrane. The length of the flue gas blending section is 7 mm, the tar adsorption section is 13 mm, and the flue gas cooling section is 10 mm. The filter rod in the flue gas blending section is a fragrance thread cellulose acetate filter rod, and the filter rod in the flue gas cooling section is a PLA membrane filter rod. The inner layer 3 of the tar adsorption functional section is a carbon-containing PLA filament bundle filter rod, and the outer layer 2 is a cellulose acetate filament bundle layer. The absorption resistance increase of the outer layer 2 compared to the inner layer 3 is 35 Pa, and the ratio of the inner layer 3 to the filter rod diameter is 1:1.5.

[0027] The above four types of multi-layer pressure-switching composite filter rods, which can improve tar adsorption capacity, were manufactured according to the principle of consistent indicators. After rolling cigarettes, the tar content in the smoke was tested. Then, ordinary filter rods of the same specifications were used as control samples and cigarettes were collected to test the tar content in the smoke.

[0028] The test results are as follows:

[0029] Table 1. Tar Detection Results

[0030] sample Tar content in flue gas / mg Decrease / % control sample 10.5 -- Example 1 8.3 20.95 Example 2 7.6 27.62 Example 3 7.1 32.38 Example 4 7.1 32.38

[0031] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made using the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A multi-layer pressure-switching composite filter rod that can improve tar adsorption capacity, comprising three end-to-end connected base rods wrapped in molding paper, wherein the near-lip section is a flue gas blending section (1), the near-tobacco section is a flue gas cooling section (4), and the middle section is a tar adsorption section, characterized in that: The suction resistance of the flue gas blending section (1) and the flue gas cooling section (4) is 25-250 Pa higher than that of the tar adsorption section. The cross-section of the tar adsorption section is a ring-shaped multi-layer structure in which the outer layer (2) covers the inner layer (3). Its suction resistance increases layer by layer from the inside to the outside. The suction resistance of the outer layer (2) is 10-35 Pa higher than that of the inner layer (3). The ratio of the diameter of the inner layer (3) to the diameter of the composite filter rod is 1:1.5-3, preferably 1:2, which is the high-efficiency tar adsorption zone.

2. The multilayer pressure-switching composite filter rod with improved tar adsorption capacity according to claim 1, characterized in that: The base rods may be of equal or unequal length, preferably of equal length, and their length is 3 to 20 mm.

3. The multilayer pressure-switching composite filter rod with improved tar adsorption capacity according to claim 1, characterized in that: The outer layer (2) is a cellulose acetate bundle, a polypropylene fiber bundle, a polylactic acid bundle, or a polylactic acid-PET composite fiber bundle.

4. The multilayer pressure-switching composite filter rod with improved tar adsorption capacity according to claim 3, characterized in that: The outer layer (2) is a cellulose acetate bundle or a polylactic acid bundle.

5. The multilayer pressure-switching composite filter rod with improved tar adsorption capacity according to claim 1, characterized in that: The inner layer (3) is a carbon-containing polylactic acid filament bundle or a carbon-containing polylactic acid nonwoven fabric.

6. The multilayer pressure-switching composite filter rod with improved tar adsorption capacity according to claim 1, characterized in that: The flue gas cooling section (4) is made of polylactic acid membrane, polylactic acid nonwoven fabric, cooling dust-free paper, or high-permeability paper coated with low-temperature phase change material.

7. The multilayer pressure-switching composite filter rod with improved tar adsorption capacity according to claim 6, characterized in that: The flue gas cooling section (4) is made of polylactic acid nonwoven fabric or high-permeability paper coated with low-temperature phase change material.

8. The multilayer pressure-switching composite filter rod with improved tar adsorption capacity according to claim 1, characterized in that: The flue gas cooling section (4) is a polylactic acid filament bundle or a polylactic acid-PET composite fiber filament bundle.

9. The multilayer pressure-switching composite filter rod with improved tar adsorption capacity according to claim 8, characterized in that: The flue gas cooling section (4) is a polylactic acid fiber bundle.

10. The multilayer pressure-swing composite filter rod with improved tar adsorption capacity according to claim 1, characterized in that: The flue gas blending section (1) is composed of cellulose acetate tow and flue gas blending material, wherein the flue gas blending material is flavoring, fragrance thread, popping beads or cellulose paper.

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