Filter stick for cigarette and cigarette

Abstract

The filter stick comprises three parts, namely a front-section filter stick close to the cigarette end, a middle-section filter stick in the middle and a rear-section filter stick close to the smoking end. The middle-section filter stick comprises a filter stick body, the filter stick body sequentially comprises a first cylinder, a second cylinder, a third cylinder and a fourth cylinder from inside to outside, and the end faces of the two ends of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder sequentially form a step shape, that is, the diameter of the second cylinder is larger than that of the first cylinder; the diameter of the third cylinder is larger than that of the second cylinder, the diameter of the fourth cylinder is larger than that of the third cylinder, and a circle of cavity is formed in the circumferential direction of the fourth cylinder; and the cavity penetrates through the fourth cylinder along the axial direction of the fourth cylinder.

Description

Technical Field

[0001] The invention relates to the field of cigarette filter rod design, and specifically discloses a filter rod for cigarettes and a cigarette. Background Art

[0002] Smoke temperature is an important parameter in the cigarette combustion process, usually between 50℃ and 70℃. The temperature of smoke directly affects the combustion performance of cigarettes and the smoking experience of consumers. The temperature of cigarette smoke has a significant impact on human health. Too high smoke temperature will cause harmful substances in the smoke to dissolve more easily in water, thus causing greater harm to the human body; specifically, too high smoke temperature will increase the content of harmful substances such as carbon monoxide, nicotine, and polycyclic aromatic hydrocarbons, which have significant harm to human health; at the same time, cigarette smoke contains a variety of harmful substances, including nicotine, tar, carbon monoxide, radioactive substances, etc.

[0003] With the enhancement of health awareness, people have put forward higher requirements for the filtering and cooling effects of cigarettes. Although the existing prior art has made many improvements to the filter rod, for example, CN118923920A, CN118235883A, CN118285559A, CN118303664A, etc., the filter rod structure design disclosed in these patents is too simple, and the cooling and filtering effects it can achieve still cannot meet the current needs of people. Summary of the invention

[0004] In order to solve the technical problems existing in the prior art, the present invention provides a filter rod for cigarettes and a cigarette, which can improve the interception of harmful substances in smoke and further reduce the temperature of the smoke.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] In the first aspect, the present invention provides a filter rod for cigarettes for cooling smoke, comprising three parts, namely, the filter rod near the cigarette end is the front filter rod, the middle is the middle filter rod, and the rear filter rod near the smoking end, the front filter rod, the middle filter rod and the rear filter rod are wrapped by forming paper; the middle filter rod comprises a filter rod body, which is a first cylinder, a second cylinder, a third cylinder, and a fourth cylinder from the inside to the outside, and the end faces of the first cylinder, the second cylinder, the third cylinder, and the fourth cylinder are formed in a stepped shape, that is, the diameter of the second cylinder is greater than the diameter of the first cylinder, the diameter of the third cylinder is greater than the diameter of the second cylinder, and the diameter of the fourth cylinder is greater than the diameter of the third cylinder, and a circle of cavity is arranged in the circumferential direction of the fourth cylinder; the cavity runs through the fourth cylinder along the axial direction of the fourth cylinder.

[0007] Furthermore, a plurality of cavities are provided, and the plurality of cavities are evenly arranged along the circumferential direction of the end face of the fourth cylinder.

[0008] Furthermore, a diameter difference between the first cylinder and the second cylinder, and a diameter difference between the second cylinder and the third cylinder are equal.

[0009] Furthermore, the diameter difference between the third cylinder and the fourth cylinder is greater than the diameter difference between the first cylinder and the second cylinder, or the diameter difference between the third cylinder and the fourth cylinder is greater than the diameter difference between the second cylinder and the third cylinder.

[0010] Furthermore, the filter rod for cigarettes in the present invention is a symmetrical structure, and the left end and the right end are designed to be completely the same.

[0011] Furthermore, the first cylinder, the second cylinder, the third cylinder, the fourth cylinder and the cavity are integrally formed;

[0012] Furthermore, the shaping paper is transparent shaping paper and has no air permeability.

[0013] In a second aspect, the present invention further discloses a cigarette, comprising the filter rod for the cigarette as described above.

[0014] In a third aspect, the present invention discloses a filter rod for cigarettes, comprising three parts, namely, a filter rod near the cigarette end is a front filter rod, a middle filter rod is a middle filter rod, and a rear filter rod is near the smoking end, wherein the front filter rod, the middle filter rod and the rear filter rod are wrapped by forming paper; the middle filter rod comprises a filter rod body, and the filter rod body is a first cylinder, a second cylinder, a third cylinder, and a fourth cylinder from the inside to the outside, and the end faces of the first cylinder, the second cylinder, the third cylinder, and the fourth cylinder are formed in a stepped shape, that is, the diameter of the second cylinder is greater than the diameter of the first cylinder, the diameter of the third cylinder is greater than the diameter of the second cylinder, and the diameter of the fourth cylinder is greater than the diameter of the third cylinder, and a cavity is arranged in the axial direction of the first cylinder, passing through the fourth cylinder.

[0015] Furthermore, the cavity includes a first cavity section, a second cavity section and a third cavity section which are arranged in sequence, the first cavity section is a conical cavity with a gradually decreasing area, the second cavity section is a cylindrical cavity, and the third cavity section is a conical cavity with a gradually increasing area.

[0016] Furthermore, the first cavity segment and the third cavity segment are symmetrically arranged relative to the radial center plane of the filter rod body.

[0017] Furthermore, the shaping paper is transparent shaping paper without air permeability.

[0018] In a fourth aspect, the present invention further discloses a cigarette, comprising the filter rod for the cigarette as described above.

[0019] The beneficial effects of the present invention are as follows:

[0020] The present invention improves the cooling effect of the filter rod and the filtering effect on harmful substances by designing the overall shape structure of the filter rod, thereby increasing the taste of smoke and reducing damage to the oral cavity; specifically, stepped sections are formed at both ends of the filter rod to increase the collision between smoke and the filter rod, thereby achieving cooling and interception of harmful substances; and at the same time, by designing the shape of the cavity, further cooling and interception of harmful substances are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the middle filter rod in the filter rod for cigarette disclosed in Example 1;

[0022] Figure 2 It is a schematic end view of a middle filter rod in the filter rod for cigarette disclosed in Example 1;

[0023] Figure 3 It is a side view of a middle filter rod in the filter rod for cigarette disclosed in Example 1;

[0024] Figure 4 It is a three-dimensional schematic diagram of a radial cross section of a middle filter rod in the filter rod for cigarette disclosed in Example 1;

[0025] Figure 5 It is a three-dimensional schematic diagram of an axial cross section of a middle filter rod in the filter rod for cigarette disclosed in Example 1;

[0026] Figure 6 It is a schematic end view of a middle filter rod in the filter rod for cigarette disclosed in Example 2;

[0027] Figure 7 A three-dimensional schematic diagram of the middle filter rod in the filter rod for cigarettes disclosed in Example 2 Figure 1 ;

[0028] Figure 8 It is a three-dimensional schematic diagram of a radial cross section of a middle filter rod in the filter rod for cigarette disclosed in Example 2;

[0029] Fig. 9 It is a three-dimensional schematic diagram of a radial cross section of a middle filter rod in the filter rod for cigarette disclosed in Example 3;

[0030] Fig.10 It is a three-dimensional schematic diagram of a radial cross section of a middle filter rod in the filter rod for cigarette disclosed in Example 3;

[0031] Fig.11It is a three-dimensional schematic diagram of a radial cross section of a middle filter rod in the filter rod for cigarette disclosed in Example 3;

[0032] In the figure: 1 is a first cylinder, 2 is a second cylinder, 3 is a third cylinder, 4 is a fourth cylinder, 5 is a cavity;

[0033] 6 cavity, 61 first cavity section, 62 second cavity section, 63 third cavity section; DETAILED DESCRIPTION

[0034] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0036] Various composite filter rods with built-in rheological components for cigarettes in the prior art include: an acetate filter rod, a rheological component, and a forming paper. The two ends of the rheological component are respectively in contact with the acetate filter rod, and the outer sides of the rheological component and the acetate filter rod are coated with forming paper. The rheological component is a polymer elastic material.

[0037] The present embodiment provides a filter rod for cigarettes. In the prior art, many filter rods for cigarettes are ternary composite filter rods, which include three parts: the filter rod near the cigarette end is the front filter rod, the middle filter rod is the middle filter rod, and the rear filter rod near the smoking end is the rear filter rod. The present embodiment is mainly designed for the middle filter rod, and the front filter rod and the rear filter rod can use existing filter rods.

[0038] Example 1

[0039] Specifically, the middle filter rod disclosed in this embodiment is as follows: Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, from inside to outside, there are the first cylinder 1, the second cylinder 2, the third cylinder 3, and the fourth cylinder 4, and the end faces of the first cylinder 1, the second cylinder 2, the third cylinder 3, and the fourth cylinder 4 are respectively formed in a stepped shape, that is, the diameter of the second cylinder 2 is larger than the diameter of the first cylinder 1, the diameter of the third cylinder 3 is larger than the diameter of the second cylinder 2, and the diameter of the fourth cylinder 4 is larger than the diameter of the third cylinder 3; with the flow direction of the smoke, the left ends of the first cylinder 1, the second cylinder 2, the third cylinder 3, and the fourth cylinder 4 form a cavity with a gradually increasing cross-sectional area space, therefore, a converging effect is formed on the smoke, guiding the smoke to flow to the end face of the fourth cylinder 4; the right ends of the first cylinder 1, the second cylinder 2, the third cylinder 3, and the fourth cylinder 4 also form a cavity with a gradually increasing cross-sectional area space, therefore, a dispersing effect is formed on the smoke, making the smoke smoother and having a better taste. A circle of cavities 5 is arranged in the circumferential direction of the fourth cylinder 4 ; the cavities 5 penetrate the two end surfaces of the fourth cylinder 4 along the axial direction of the fourth cylinder 4 .

[0040] In this embodiment, four cavities 5 are provided, and the four cavities 5 are respectively located in the front, back, left, and right directions of the end surface of the fourth cylinder 4 .

[0041] In this embodiment, the diameter difference between the first cylinder 1 and the second cylinder 2, and the diameter difference between the second cylinder 2 and the third cylinder 3 are equal; and the diameter difference between the third cylinder 3 and the fourth cylinder 4 is greater than the diameter difference between the first cylinder 1 and the second cylinder 2, or the diameter difference between the third cylinder 3 and the fourth cylinder 4 is greater than the diameter difference between the second cylinder 2 and the third cylinder 3; by designing the diameter difference between multiple cylinders, the cooling of the flue gas and the deposition of harmful substances can be adjusted.

[0042] Furthermore, the filter rod for cigarettes in the present invention is a symmetrical structure, the left end and the right end are designed exactly the same, and the first cylinder 1, the second cylinder 2, the third cylinder 3, the fourth cylinder 4 and the cavity 5 are integrally formed.

[0043] Furthermore, the shape of the cross section of the cavity 5 is similar to a trapezoid, or other irregular shapes. By designing the cavity 5 into an irregular shape, the flue gas can continuously collide with the inner wall of the cavity 5 during the flow process, thereby enhancing the cooling effect and increasing the deposition of harmful substances.

[0044] The working principle of the filter rod for cigarette disclosed in this embodiment is as follows:

[0045] When the smoke flows from the front filter rod to the middle filter rod, since the end faces of the first cylinder 1, the second cylinder 2, the third cylinder 3, and the fourth cylinder 4 are formed in a stepped shape in sequence, the smoke will continuously collide with the end faces of the first cylinder 1, the second cylinder 2, the third cylinder 3, and the fourth cylinder 4, thereby achieving cooling and better intercepting harmful substances. At the same time, since the left ends of the first cylinder 1, the second cylinder 2, the third cylinder 3, and the fourth cylinder 4 form a cavity with a gradually increasing cross-sectional area, a confluence is formed for the smoke. The smoke is guided to flow to the end face of the fourth cylinder 4 and then enter the cavity 5, where the smoke is cooled and harmful substances are deposited. Finally, after the smoke flows out of the cavity 5, the first cylinder 1, the second cylinder 2, the third cylinder 3 and the right end of the fourth cylinder 4 form a cavity with a gradually increasing cross-sectional area. Therefore, a dispersion effect is formed on the smoke, making the smoke smoother and having a better taste. At the same time, it also plays a role of reducing pressure; a certain pressure difference is formed between the left end and the right end, reducing the suction resistance;

[0046] This embodiment is based on the principle of fluid mechanics and combines the principle of flue gas flow field change. By adding a rheological fixture to the filter rod, the rheological state of the flue gas is significantly changed, so that the flue gas has a complex flow trajectory when passing through the filter rod, and produces eddy currents, dispersion, deceleration and other effects when passing through the fixture, thereby improving the filtering effect and achieving the effect of reducing tar and reducing harm. At the same time, the geometric structure design of the rheological fixture makes the resistance of the filter rod moderate and does not affect the smoothness of smoking.

[0047] Furthermore, a shaping paper is arranged on the outside of the middle filter rod. The shaping paper is a transparent shaping paper with no air permeability, and the flow of smoke can be observed through the shaping paper.

[0048] Furthermore, the front filter rod close to the tobacco section is made of cellulose acetate and is used for preliminary filtering of large particulate matter in the smoke.

[0049] Furthermore, the rear filter rod near the mouth end is made of cellulose acetate and is used to further filter the smoke and remove residual particles and harmful substances.

[0050] Furthermore, the middle filter rod in this embodiment can be made of silica gel material, which will not produce harmful substances due to the increase in smoke temperature.

[0051] The present invention improves the cooling effect of the filter rod and the filtering effect on harmful substances by designing the overall shape structure of the filter rod, thereby increasing the taste of smoke and reducing damage to the oral cavity; specifically, stepped sections are formed at both ends of the filter rod to increase the collision between smoke and the filter rod, thereby achieving cooling and interception of harmful substances; and at the same time, by designing the shape of the cavity, further cooling and interception of harmful substances are achieved.

[0052] Example 2

[0053] This embodiment provides another filter rod for cigarettes, specifically as follows Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, from the inside to the outside, there are the first cylinder, the second cylinder, the third cylinder, and the fourth cylinder, and the end faces of the first cylinder, the second cylinder, the third cylinder, and the fourth cylinder are formed in a stepped shape, that is, the diameter of the second cylinder is larger than the diameter of the first cylinder, the diameter of the third cylinder 3 is larger than the diameter of the second cylinder, the diameter of the fourth cylinder is larger than the diameter of the third cylinder, and a circle of cavities is set in the circumferential direction of the fourth cylinder; the cavity is along the axial direction of the fourth cylinder and penetrates the fourth cylinder;

[0054] The difference from Example 1 is that in this embodiment, six cavities are provided, and the six cavities are evenly arranged along the circumferential direction of the end surface of the fourth cylinder. However, the working principle of the device is the same as that of Example 1, and will not be described in detail here.

[0055] Example 3

[0056] This embodiment provides another filter rod for cigarettes, such as Fig. 9 , Fig.10 , Fig.11 As shown, from the inside to the outside, there are the first cylinder 1, the second cylinder 2, the third cylinder 3, and the fourth cylinder 4, and the end faces of the first cylinder 1, the second cylinder 2, the third cylinder 3, and the fourth cylinder 4 are formed in a stepped shape in sequence, that is, the diameter of the second cylinder 2 is larger than the diameter of the first cylinder 1, the diameter of the third cylinder 3 is larger than the diameter of the second cylinder 2, and the diameter of the fourth cylinder 4 is larger than the diameter of the third cylinder 3, and a cavity 6 is arranged in the axial center direction of the first cylinder 1, and the cavity 6 runs through the left and right end faces of the first cylinder 1 along the axial direction of the first cylinder 1;

[0057] Furthermore, the cavity 6 includes a first cavity section 61, a second cavity section 62 and a third cavity section 63 which are arranged in sequence, wherein the first cavity section 61 is a conical cavity with a gradually decreasing area, the second cavity section 62 is a cylindrical cavity, and the third cavity section 63 is a conical cavity with a gradually increasing area; the first cavity section 61 realizes the cooling of the flue gas and the deposition of harmful substances, and since the cross-section of the second cavity section 62 is reduced relative to the first cavity section, the flue gas is accelerated in the second cavity section 63, and since the cross-section of the third cavity section 63 is gradually increased relative to the second cavity section 62, the flue gas is decelerated in the third cavity section 63, thereby improving the deposition effect of harmful substances and dispersing the flue gas.

[0058] The working principle of the device is as follows:

[0059] When the smoke flows from the front filter rod to the middle filter rod, since the end faces of the first cylinder 1, the second cylinder 2, the third cylinder 3, and the fourth cylinder 4 are stepped in sequence, part of the smoke will continuously collide with the end faces of the first cylinder 1, the second cylinder 2, the third cylinder 3, and the fourth cylinder 4, thereby achieving cooling while better intercepting harmful substances, and then entering the cavity 6; at the same time, the cavity can store a certain amount of smoke to increase the pressure at this end; at the same time, part of the smoke will directly enter the cavity 6. Since the structural design of the cavity 6 is relatively special, the part of the smoke that directly enters the cavity 6 will be cooled in the cavity 6 and the harmful substances will be intercepted. After the smoke flows out of the cavity 6, most of the smoke will flow away directly. However, since the right ends of the first cylinder 1, the second cylinder 2, the third cylinder 3, and the fourth cylinder 4 form a cavity with a gradually increasing cross-sectional area, part of the smoke flowing out of the cavity 6 will flow into the cavity for further cooling and deposition of harmful substances, but most of the smoke will flow away directly. Since only a small part of the smoke may flow into the cavity, the cavity can form a vacuum cavity most of the time, thereby reducing the pressure of the smoke at this end; this creates a certain pressure difference between the smoke at both ends of the middle filter rod, thereby reducing the suction resistance.

[0060] The remaining structures are the same as those in Example 1 and will not be described in detail here.

[0061] The present invention improves the cooling effect of the filter rod and the filtering effect on harmful substances by designing the overall shape structure of the filter rod, thereby increasing the taste of smoke and reducing damage to the oral cavity; specifically, stepped sections are formed at both ends of the filter rod to increase the collision between smoke and the filter rod, thereby achieving cooling and interception of harmful substances; and at the same time, by designing the shape of the cavity, further cooling and interception of harmful substances are achieved.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A filter rod for cigarettes, characterized in that: The invention comprises a filter rod body, which is a first cylinder, a second cylinder, a third cylinder and a fourth cylinder from the inside to the outside, and the end faces of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder are formed in a stepped shape, that is, the diameter of the second cylinder is larger than the diameter of the first cylinder, the diameter of the third cylinder is larger than the diameter of the second cylinder, the diameter of the fourth cylinder is larger than the diameter of the third cylinder, and a circle of cavities is arranged in the circumferential direction of the fourth cylinder; the cavity is along the axial direction of the fourth cylinder and penetrates the fourth cylinder.

2. The filter rod for cigarette according to claim 1, characterized in that: There are multiple cavities, and the multiple cavities are evenly arranged along the circumferential direction of the end face of the fourth cylinder.

3. The filter rod for cigarette according to claim 1, characterized in that: The cross section of the cavity is irregular.

4. The filter rod for cigarette according to claim 1, characterized in that: The shaping paper is transparent shaping paper without air permeability.

5. A cigarette, characterized in that: The invention comprises a filter rod for cigarettes as described in any one of claims 1 to 4.

6. A filter rod for cigarettes, characterized in that: The invention comprises a filter rod body, which is a first cylinder, a second cylinder, a third cylinder and a fourth cylinder from the inside to the outside, and the end faces of the first cylinder, the second cylinder, the third cylinder and the fourth cylinder are formed in a stepped shape, that is, the diameter of the second cylinder is larger than the diameter of the first cylinder, the diameter of the third cylinder is larger than the diameter of the second cylinder, the diameter of the fourth cylinder is larger than the diameter of the third cylinder, and a cavity is arranged in the axial direction of the first cylinder, which passes through the fourth cylinder.

7. The filter rod for cigarette according to claim 6, characterized in that: The cavity comprises a first cavity section, a second cavity section and a third cavity section which are arranged in sequence. The first cavity section is a conical cavity with a gradually decreasing area, the second cavity section is a cylindrical cavity, and the third cavity section is a conical cavity with a gradually increasing area.

8. The filter rod for cigarette according to claim 6, characterized in that: The first cavity section and the third cavity section are symmetrically arranged relative to the radial center plane of the filter rod body.

9. The filter rod for cigarette according to claim 6, characterized in that: The shaping paper is transparent shaping paper without air permeability.

10. A cigarette, characterized in that: A filter rod for cigarettes comprising any one of claims 5-9.

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