Groove filter stick and cigarette

Abstract

The utility model discloses a groove filter stick and a cigarette. The groove filter stick comprises an inner core, an annular outer core and groove paper. And the annular outer core sleeves the radial outer side of the inner core. The annular outer core comprises a groove outer core section and a smooth outer core section which are sequentially arranged in the axial direction. And a plurality of grooves which are arranged at intervals in the circumferential direction are formed in the outer circumferential surface of the groove outer core section. The groove extends in the axial direction. The groove paper wraps the outer side of the annular outer core, and the shape of the groove paper is the same as that of the peripheral face of the annular outer core so that the groove paper can be attached to the peripheral face of the annular outer core. The groove section and the smooth section are sequentially arranged on the groove filter stick in the axial direction, smoke can flow towards the groove section in the process of flowing in the axial direction, the smoke can flow in the radial direction or in the direction inclined to the axial direction, the flowing direction of the smoke can be continuously changed, and therefore the smoke can flow in the groove section in the radial direction or in the direction inclined to the axial direction. Therefore, the tar can be filtered more, and the interception efficiency of the tar can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tobacco, in particular to a groove filter rod and a cigarette. Background Art

[0002] Cigarette smoke contains tar, which is harmful to the human body. Attaching filter rods to tobacco segments can effectively reduce tar and other harmful components. A filter rod is a column made of filter material that filters certain substances in cigarette smoke, such as tar and nicotine, while also cooling and diverting the smoke. It is a component of filter-tipped cigarettes. Specifically, the filter rod's filtration of particulate matter is a mechanical filtration method, and the mechanisms that cause smoke particle filtration are mainly direct interception, inertial collision, and diffusion deposition. Filter-tipped cigarettes effectively avoid the discomfort caused by cigarette dust sticking to the lips, reduce harmful substances in the smoke, and provide consumers with smoke of the right temperature and taste, so they were quickly accepted by consumers. How to improve the filtration efficiency of the filter rod in cigarettes is a problem that needs to be solved.

[0003] It should be noted that the statements in this background technology section only provide background technology related to the present invention and do not necessarily constitute prior art. Utility Model Content

[0004] The utility model provides a groove filter rod and a cigarette to improve filtering efficiency.

[0005] The first aspect of the present invention provides a groove filter rod, comprising:

[0006] inner core;

[0007] an annular outer core, sleeved on the radially outer side of the inner core, and the annular outer core includes a groove outer core segment and a smooth outer core segment sequentially arranged in the axial direction, the outer circumferential surface of the groove outer core segment is provided with a plurality of grooves spaced apart in the circumferential direction, and the grooves extend in the axial direction; and

[0008] The groove paper is wrapped around the outer side of the annular outer core and has the same shape as the outer peripheral surface of the annular outer core so as to fit the outer peripheral surface of the annular outer core.

[0009] In some embodiments, the cross-sectional shape of the groove is trapezoidal.

[0010] In some embodiments, the plurality of grooves are evenly distributed in the circumferential direction of the core segment outside the groove.

[0011] In some embodiments, the outer peripheral surface of the smooth outer core segment is configured as a smooth surface.

[0012] In some embodiments, the groove filter rod further comprises a first wrapping paper disposed between the inner core and the annular outer core, wherein the first wrapping paper is a high-transparency wrapping paper.

[0013] In some embodiments, the groove filter plug further comprises a second wrapping paper disposed outside the annular outer core.

[0014] In some embodiments, the density of the inner core is different than the density of the annular outer core.

[0015] In some embodiments, the inner core comprises acetate tow; and / or, the annular outer core comprises acetate tow.

[0016] In some embodiments, the denier of the acetate tow of the inner core is different than the denier of the acetate tow of the annular outer core.

[0017] A second aspect of the present invention provides a cigarette comprising a tobacco segment and the groove filter rod.

[0018] In some embodiments, the grooved filter rod includes a smooth outer core segment and two grooved outer core segments respectively disposed at two axial ends of the smooth outer core segment.

[0019] Based on the technical solution provided by the embodiment of the present invention, the groove filter rod includes an inner core, an annular outer core and grooved paper. The annular outer core is sleeved on the radially outer side of the inner core. The annular outer core includes a grooved outer core segment and a smooth outer core segment arranged in sequence in the axial direction. The outer peripheral surface of the grooved outer core segment is provided with a plurality of grooves spaced apart in the circumferential direction. The grooves extend in the axial direction. The grooved paper is wrapped around the outer side of the annular outer core and the shape of the grooved paper is the same as the shape of the outer peripheral surface of the annular outer core so as to fit the outer peripheral surface wrapped thereon. The grooved filter rod of the embodiment of the present invention is formed with a grooved outer core segment and a smooth outer core segment on the outer surface of the annular outer core in the axial direction by wrapping the grooved paper around the outer side of the annular outer core. A groove is formed on the outer periphery of the grooved outer core segment, and the interior of the groove is hollow, so the resistance is minimal. Then, when the smoke flows, it will flow towards the groove portion with the least resistance, and then it will pass through the filtration of the inner core, the annular outer core and the grooved paper in sequence in the radial direction, thereby improving the interception efficiency. Furthermore, the groove filter rod of the embodiment of the present invention is provided with groove sections and smooth sections in sequence in the axial direction, so that the flue gas will flow toward the groove sections during the process of flowing along the axial direction, and will therefore flow along the radial direction or in a direction inclined to the axial direction, and the flow direction of the flue gas will continue to change, so that it can undergo more filtration, thereby increasing the interception efficiency of tar.

[0020] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 Schematic diagram of the longitudinal cross-section structure of a cigarette in some embodiments of the present invention.

[0023] Figure 2 for Figure 1 Schematic diagram of the cross-section of the groove filter rod of the cigarette shown.

[0024] Figure 3 Schematic diagram of the manufacturing process of the groove filter rod in some embodiments of the present invention. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0027] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be subsequently positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used herein are interpreted accordingly.

[0028] refer to Figure 1 Some embodiments of the present invention provide a cigarette comprising a tobacco segment 20 and a grooved filter rod 10. The grooved filter rod 10 is connected to the proximal lip end of the tobacco segment 20 to form a filter tip.

[0029] refer to Figures 1 to 3 In some embodiments of the present invention, the grooved filter rod 10 includes an inner core 1, an annular outer core 3 and a grooved paper 4. The annular outer core 3 is sleeved on the radially outer side of the inner core 1. The annular outer core 3 includes a grooved outer core segment 31 and a smooth outer core segment 32 arranged in sequence in the axial direction. The outer peripheral surface of the grooved outer core segment 31 is provided with a plurality of grooves spaced apart in the circumferential direction. The grooves extend in the axial direction. The grooved paper 4 is wrapped around the outer side of the annular outer core 3 and the shape of the grooved paper 4 is the same as the shape of the outer peripheral surface of the annular outer core 3 so as to fit the outer peripheral surface wrapped thereon.

[0030] The annular outer core 3 of the present embodiment is sleeved radially outside the inner core 1. The annular outer core 3 is annular in shape and includes a central hole. The inner core 1 is disposed within the central hole, and the shape of the inner core 1 matches the shape of the central hole so that the annular outer core 3 sleeves outside the inner core 1. In one embodiment, the annular outer core 3 and the inner core 1 are coaxially disposed, that is, the axis of the annular outer core 3 is collinear with the axis of the inner core 1.

[0031] In some embodiments, the cross-sectional shapes of the annular outer core 3 and the inner core 1 are the same and are both circular. In some other embodiments, the cross-sectional shapes of the annular outer core 3 and the inner core 1 are the same and can both be other shapes, such as triangular, square, polygonal and other structures. Of course, in some other embodiments, the cross-sectional shapes of the annular outer core 3 and the inner core 1 can also be different, for example, the inner core 1 is square, and the annular outer core 3 is circular; for another example, the inner core 1 is circular, and the annular outer core 3 is polygonal. This embodiment does not limit the cross-sectional shape of the grooved filter rod 10 or the cross-sectional shapes of the annular outer core 3 and the inner core 1.

[0032] refer to Figure 1 and Figure 3 The annular outer core 3 of the embodiment of the present invention includes a grooved outer core segment 31 and a smooth outer core segment 32 arranged in sequence in the axial direction. Among them, the outer surface of the grooved outer core segment 31 is provided with grooves, and in contrast, the outer surface of the smooth outer core segment 32 is smooth and not provided with grooves, and is a solid segment. That is to say, the outer surface of the annular outer core 3 of the embodiment of the present invention is composed of a grooved outer core segment and a smooth outer core segment 32 arranged in sequence in the axial direction. Among them Figure 2 A schematic cross-sectional view of the groove outer core segment 31 is shown, from which it can be seen that a jagged tooth-shaped groove structure is provided on the circumferential surface of the groove outer core segment 31 .

[0033] In order to shape the annular outer core 3 into the aforementioned shape of the grooved outer core segment 31 and the smooth outer core segment 32 arranged in sequence, a grooved paper 4 is provided on the outer side of the annular outer core 3 of the present embodiment. The grooved paper 4 has grooves formed on its surface. Therefore, wrapping the grooved paper 4 around the outer surface of the annular outer core 3 can form the outer surface of the annular outer core 3 into the aforementioned shape. Therefore, in the axial direction, the surface of the grooved paper also has grooved segments and smooth segments arranged in sequence.

[0034] It should also be noted that the axial direction refers to the length direction of the cigarette, that is, the length direction of the groove filter rod.

[0035] The grooved filter rod of the embodiment of the present invention is formed by wrapping the grooved paper 4 around the outer side of the annular outer core 3 so that the outer surface of the annular outer core 3 is formed with a grooved outer core segment 31 and a smooth outer core segment 32 in the axial direction. The outer circumference of the grooved outer core segment 31 is formed with a groove. The interior of the groove is hollow, so the resistance is minimized. Then, when the smoke flows, it will flow toward the groove portion with the least resistance. Then, in the radial direction, it will be filtered by the inner core 1, the annular outer core 3 and the grooved paper 4 in sequence, thereby improving the interception efficiency. Furthermore, the grooved filter rod of the embodiment of the present invention is provided with a grooved segment and a smooth segment in sequence in the axial direction. In this way, when the smoke flows in the axial direction, it will flow toward the grooved segment, thus flowing in the radial direction or in a direction inclined to the axial direction. Moreover, the flow direction of the smoke will continuously change, so that it can pass through more filtration, thereby increasing the interception efficiency of tar. Moreover, due to the increase in the path and the filtration through more layers, the smoke can also be better cooled, thereby improving the smoke's smoking taste and sense of security. Furthermore, since grooves are formed on the surface of the grooved paper 4, the effective filtering area of ​​the grooved paper can be increased, thereby further improving the filtering effect on the smoke.

[0036] In some embodiments, the cross-sectional shape of the groove is trapezoidal. Of course, in other embodiments, the cross-sectional shape of the groove can also be other shapes.

[0037] In a specific embodiment, the outer contour of the cross section of the groove outer core segment 31 is in the shape of a gear contour line. Figure 2 As shown, the grooved outer core segment 31 of this embodiment is manufactured by shaping its outer profile into the shape of gear teeth, with grooves formed between the teeth. The outer profile of the cross-section of the grooved outer core segment 31 is shaped like the outline of a gear. Specifically, the grooved outer core segment 31 can be formed by squeezing the grooved paper 4 with a gear-shaped roller and wrapping the grooved paper 4 around the outer side of the annular outer core 3, thereby simplifying and facilitating manufacturing.

[0038] In some embodiments, the plurality of grooves are evenly distributed in the circumferential direction of the outer core segment of the groove. The even arrangement of the plurality of grooves helps the smoke to flow evenly and improves the uniformity of the smoke flow.

[0039] In some embodiments, the outer circumference of the smooth outer core segment is configured as a smooth surface. The smooth surface here refers to the outer circumference of this portion being free of grooves and forming a solid annular structure in the radial direction. This results in the outer radial surface of the annular outer core 3 being both grooved and solid, thereby allowing cross-flow of smoke and increasing the filtration path.

[0040] In some embodiments, the grooved filter plug further includes a first wrapping paper 2 disposed between the inner core 1 and the annular outer core 3. The first wrapping paper 2 is a high-transparency wrapping paper. High-transparency wrapping paper is a special wrapping paper used in filter tips, characterized by high air permeability and excellent forming properties. Tiny holes are formed in the paper through a special processing technique, thereby enhancing air circulation.

[0041] In some embodiments, the grooved filter rod further comprises a second wrapping paper 5 arranged outside the annular outer core 3. The second wrapping paper 5 can be a highly permeable wrapping paper or an airtight wrapping paper.

[0042] In some embodiments, the density of the inner core 1 is different from the density of the annular outer core 3. This arrangement can facilitate the flow of smoke in the radial direction of the filter rod body, further improving the cooling and filtering effects of the smoke.

[0043] In some embodiments, the inner core 1 comprises acetate tow. The annular outer core 3 comprises acetate tow.

[0044] In some embodiments, the denier of the acetate tow of the inner core 1 is different from the denier of the acetate tow of the annular outer core 3. The different deniers can be made of tows of different single deniers or different total deniers. Alternatively, tows of the same specification can be filled into different densities. The denier of the acetate tow of the inner core 1 is different from the denier of the acetate tow of the annular outer core 3, so that the filtration efficiency and suction resistance of the inner core 1 and the annular outer core 3 are different, which further helps the flow of smoke in the radial direction. In this way, the pressure drop difference between the inner and outer circles causes the smoke path to change and improves the filtration efficiency of the filter. Cigarettes using coaxial core filter rods have an obvious concentric circle on the end face of the filter, which is a visible new filter rod technology that gives the filter a novel appearance.

[0045] The manufacturing process of the groove filter rod in some embodiments is as follows:

[0046] The inner core 1 is an acetate tow filter element, formed by opening acetate tow and applying glycerin, then wrapped with a first wrapping paper 2 to form the outer surface. After forming, the inner core 1 is conveyed forward from the first pipe channel to the second pipe channel. In the second pipe channel, another strand of acetate tow is opened, glycerinized, and fed with grooved paper 4. It is then wrapped with a second wrapping paper 5 to form a grooved filter rod. During the feeding process, the grooved paper 4 is rolled by a dedicated grooved roller, forming gear-like grooves. These grooves are not continuous, but are intermittently distributed along the axis of the grooved paper according to the design of the roller. The grooved areas are grooved sections, and the areas without grooves are smooth sections.

[0047] like Figure 3 As shown, the groove filter rod according to the embodiment of the present invention is formed by cutting a longer filter rod.

[0048] In some embodiments, the grooved filter rod includes a smooth outer core segment 32 and two grooved outer core segments 31 respectively disposed at two axial ends of the smooth outer core segment 32 .

[0049] like Figure 1 and Figure 2 As shown, the grooved filter rod 10 of this embodiment includes a smooth outer core segment 32 and two grooved outer core segments 31 disposed at either end. This ensures that the grooved filter segment 31 is directly connected to the tobacco segment 20, and the grooved outer core segment 31 is also disposed at the outermost end. This allows consumers to easily identify the cigarette from the end, enhancing recognition.

[0050] The grooved filter rod of the embodiment of the present invention combines a coaxial core filter rod with a grooved filter rod. Based on the ordinary coaxial core filter rod, grooved paper is applied during the outer core molding process to form a coaxial core grooved filter rod. This filter rod has the following advantages: First, it has a higher interception efficiency than a single coaxial core filter rod or a grooved filter rod, and can better absorb tar and nicotine in the flue gas, achieving the effect of reducing tar and reducing harm. Second, it has the appearance characteristics of both a coaxial core filter rod and a grooved filter rod, and has a stronger and more novel appearance. When used with colored grooved paper, it can achieve a better anti-counterfeiting effect.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and not to limit it; although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solution of the utility model, they should all be included in the scope of the technical solution for protection of the utility model.

Claims

1. A groove filter rod, characterized in that: include: Inner core (1); An annular outer core (3) is sleeved on the radially outer side of the inner core (1), and the annular outer core (3) comprises a grooved outer core segment (31) and a smooth outer core segment sequentially arranged in the axial direction, wherein the outer peripheral surface of the grooved outer core segment is provided with a plurality of grooves spaced apart in the circumferential direction, and the grooves extend along the axial direction; and The grooved paper (4) is wrapped around the outer side of the annular outer core (3) and has the same shape as the outer peripheral surface of the annular outer core (3) so as to fit the outer peripheral surface.

2. The groove filter rod according to claim 1, characterized in that The cross-sectional shape of the groove is trapezoidal.

3. The groove filter rod according to claim 1, characterized in that: The plurality of grooves are evenly distributed in the circumferential direction of the groove outer core segment.

4. The groove filter rod according to claim 1, characterized in that: The outer peripheral surface of the smooth outer core segment is configured as a smooth surface.

5. The groove filter rod according to claim 1, characterized in that: The groove filter rod further comprises a first shaping paper (2) arranged between the inner core (1) and the annular outer core (3), wherein the first shaping paper (2) is a high-transparency shaping paper.

6. The groove filter rod according to claim 1, characterized in that: The grooved filter rod further comprises a second shaping paper (5) arranged outside the annular outer core (3).

7. The groove filter rod according to claim 1, characterized in that: The density of the inner core (1) is different from the density of the annular outer core (3).

8. The groove filter rod according to claim 7, characterized in that: The inner core (1) comprises acetate fiber tow; and / or the annular outer core (3) comprises acetate fiber tow.

9. The groove filter rod according to claim 8, characterized in that: The denier of the acetate fiber bundle of the inner core (1) is different from the denier of the acetate fiber bundle of the annular outer core (3).

10. A cigarette, characterized in that: The invention comprises a tobacco cut section and a groove filter rod according to any one of claims 1 to 9.

11. The cigarette according to claim 10, characterized in that: The grooved filter rod comprises a smooth outer core segment (32) and two grooved outer core segments (31) respectively arranged at two axial ends of the smooth outer core segment (32).

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