Cigarette filter rod with hollow tube

Abstract

The utility model discloses a filter stick for cigarette, which comprises a strip-shaped filter stick body, a strip-shaped channel in the middle of the filter stick body, and a cooling material coated on the wall of the channel.

Description

Technical Field

[0001] This utility model relates to the field of tobacco products, and in particular to a cigarette filter rod with an empty tube. Background Technology

[0002] Cigarette smoke contains tar, which is harmful to the human body. Attaching a filter to a cigarette can effectively reduce tar and other harmful components. A filter rod is a rod of a certain length made from filter material, with a hollow channel in the middle; such rods are called hollow tube filter rods. After being cut, the filter rod is combined with other structures that have filtering and cooling functions to form a filter tip, which is attached to the inhalation end of the cigarette. The filter tip is a column that filters certain substances in cigarette smoke, such as tar or nicotine, while also cooling and guiding the smoke; it is an integral part of filter-tipped cigarettes. Utility Model Content

[0003] The purpose of this invention is to provide a flue gas filter rod that can have a better cooling effect on flue gas after the filter tip is formed.

[0004] This utility model discloses a cigarette filter rod with an empty tube, comprising:

[0005] A strip-shaped filter rod body includes a strip-shaped channel located in its middle, the channel penetrating the filter rod body;

[0006] A cooling material, coated on the wall of the channel, is configured to contact and cool the flue gas as it passes through the channel.

[0007] In some embodiments, the cooling material is configured such that, before contact with flue gas, the cooling material is a solid or paste, and during contact with and cooling of the flue gas, the cooling material changes from a solid or paste to a liquid; or, before contact with flue gas, the cooling material is a liquid.

[0008] In some embodiments, the cooling material is polyethylene glycol 4000 or propylene glycol.

[0009] In some embodiments, the cooling material includes a cooling strip extending axially along the channel.

[0010] In some embodiments, the cooling material includes a plurality of cooling strips extending axially along the channel, the plurality of cooling strips being uniformly distributed circumferentially along the channel.

[0011] In some embodiments, the cooling material covers the walls of the channel.

[0012] In some embodiments, the empty tube filter rod for tobacco also includes a flavoring substance mixed in the cooling material.

[0013] In some embodiments, the filter rod body is made of cellulose acetate tow, and the empty tube filter rod for cigarettes also includes molding paper that wraps around the outside of the filter rod body.

[0014] In some embodiments, the cross-sectional shape of the channel is non-circular.

[0015] In some embodiments, the channel includes a plurality of grooves evenly distributed circumferentially.

[0016] Based on the flue gas filter rod provided by this utility model, by coating the wall surface of the strip-shaped channel of the strip-shaped filter rod body with a cooling material, after the empty tube filter rod is cut into a filter tip, the flue gas will come into contact with the cooling material on the wall surface when passing through the channel. While the channel guides the flue gas, the cooling material will cool the flue gas, thereby further improving the cooling capacity of the filter tip for the flue gas.

[0017] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of the empty tube filter rod for cigarettes according to an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the structure of a cigarette filter rod according to another embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of a cigarette filter rod according to another embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of a cigarette filter rod according to another embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of a cigarette filter rod according to another embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of a cigarette filter rod according to another embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of a cigarette filter rod according to another embodiment of the present invention. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0028] In the description of this utility model, it should be understood that the use of terms such as "first" and "second" to define the components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" 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 (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0031] like Figure 1 As shown, the smoke filter rod of this embodiment includes a strip-shaped filter rod body 1 and a cooling material 3.

[0032] The strip-shaped filter rod 1 includes a strip-shaped channel 2 located in its middle, and the channel 2 passes through the filter rod 1.

[0033] Cooling material 3 is coated on the wall surface 21 of channel 2. Cooling material 3 is configured to contact and cool the flue gas as it passes through channel 2. "Coating cooling material 3 on the wall surface 21" means that cooling material 3 is adhered to the wall surface 21 of channel 2, which can be achieved through spraying, smearing, or other methods. After cooling material 3 is coated on wall surface 21, when the empty tube filter rod is cut into many small segments and used to form a filter tip, during smoking, the flue gas comes into contact with the cooling material as it passes through the channel. The cooling material absorbs the heat from the flue gas, thus cooling it.

[0034] In this embodiment, the empty tube filter rod for cigarettes is formed by coating a cooling material 3 onto the wall 21 of the strip-shaped channel 2 of the strip-shaped filter rod body 1. After the filter rod body is manufactured, the cooling material is then attached to the wall of the channel by coating, making the formation process simple. After the empty tube filter rod is cut to form the filter tip, the flue gas will come into contact with the cooling material 3 on the wall 21 when it passes through the channel 2. While the channel 2 guides the flue gas, the cooling material 3 cools the flue gas, thereby further improving the cooling capacity of the filter tip for the flue gas.

[0035] In some embodiments, the flue gas filter rod is configured such that, before contacting the flue gas, the cooling material 3 is a solid or paste; upon contact with the flue gas and during the cooling process, the cooling material 3 transforms from a solid or paste into a liquid. In this embodiment, the cooling material is a solid or paste at room temperature. After contacting the flue gas and during the cooling process, the cooling material absorbs heat and transforms into a liquid phase. The liquid then continues to absorb heat to further cool the flue gas. During this process, the cooling material absorbs heat through both phase change and specific heat, resulting in a large heat absorption capacity and achieving a good cooling effect on the flue gas.

[0036] For example, cooling material 3 is polyethylene glycol 4000. Polyethylene glycol 4000 is heated to become liquid. After the filter rod body is formed from filaments such as cellulose acetate filaments into a strip-shaped filter rod with hollow channels, the liquid polyethylene glycol 4000 is sprayed onto the wall surface of the channels of the hollow tube filter rod. Then, at room temperature, the polyethylene glycol 4000 remaining on the inner wall of the hollow tube will solidify and adhere to the inner wall. When the filter tip comes into contact with the passing 60-70 degree Celsius flue gas, the polyethylene glycol 4000 absorbs heat from the flue gas, transforming into a liquid state and cooling the flue gas. In some embodiments, the flue gas filter rod also includes a flavoring substance mixed in the cooling material 3. This embodiment, by adding a flavoring substance to the cooling material, not only cools the flue gas but also enhances its flavor, improving the functionality of the filter rod and facilitating the addition of the flavoring substance to the filter rod. When the cooling material 3 is a solid or paste, it remains solid or paste at room temperature, and the added fragrance is not easily lost. When the flue gas passes through, the cooling material 3 becomes liquid and releases the fragrance, resulting in a better lasting fragrance effect for the filter rod.

[0037] In some embodiments, the cooling material 3 is a liquid, such as propylene glycol, before contacting the flue gas. In this embodiment, the cooling material is also a liquid at room temperature, remaining capillarily within the fiber gaps of the inner wall of the hollow tube filter rod. Utilizing the high specific heat capacity of this material relative to cellulose acetate bundles, it exchanges heat with the flue gas, thereby reducing the flue gas temperature. Simultaneously, flavoring substances can be dissolved in propylene glycol and applied as needed, achieving both cooling and flavor transfer into the flue gas, thus adjusting the flue gas flavor.

[0038] In some embodiments, such as Figure 1 and Figure 2 As shown, the cooling material 3 includes a cooling strip 31 extending axially along the channel 2. With the same coating amount, the more concentrated the coating points, the better the slow-release effect. In this embodiment, by concentrating the cooling material 3 to be added to the air tube filter rod onto a single cooling strip 31, the release time of the cooling material can be increased when the air tube filter rod is used as a filter nozzle, resulting in more sustained cooling of the flue gas and improved cooling uniformity.

[0039] In some embodiments, such as Figure 3 and Figure 4 As shown, the cooling material 3 includes multiple cooling strips 31 extending axially along the channel 2, and the multiple cooling strips 31 are uniformly distributed circumferentially along the channel 2. In such a way... Figure 3 In the embodiment shown, two cooling strips 31 are evenly distributed along the circumference of channel 2. In such a case... Figure 4 In the illustrated embodiment, four cooling strips 31 are evenly distributed along the circumference of channel 2. By setting the cooling material into multiple evenly distributed cooling strips 31, this embodiment can release the cooling material more quickly, improve the initial cooling effect of the flue gas, and the even distribution of the cooling strips can improve the uniformity of cooling the flue gas.

[0040] In some embodiments, such as Figure 5 As shown, the cooling material 3 covering the wall 21 of the channel 2 means that the cooling material 3 completely covers the wall 21 of the channel 2. This embodiment can release the cooling material more quickly, improve the initial cooling effect of the smoke, and the cooling effect is more obvious in the first few puffs of smoking. For example, if the temperature of the first few puffs of a heated cigarette is high and it is necessary to significantly reduce the temperature of the first few puffs, or if you want to achieve a strong release of aroma substances, this embodiment is suitable.

[0041] In some embodiments, the filter rod body 1 is made of cellulose acetate tow, and the empty tube filter rod for cigarettes also includes a forming paper 4 that wraps around the outside of the filter rod body 1. The filter rod body 1 can be formed by adding triacetin to cellulose acetate tow and then curing it. The forming paper 3 prevents the smoke passing through the filter rod body from flowing radially to the outside.

[0042] In some embodiments, such as Figure 6 and Figure 7 As shown, the cross-sectional shape of channel 2 is non-circular. By using a non-circular cross-section in this embodiment, the shape of the cross-section can be made more uneven, allowing the cooling material to adhere more firmly to the wall surface after being coated, thus improving the adhesion effect of the cooling material.

[0043] In some embodiments, such as Figure 6 and Figure 7 As shown, channel 2 includes multiple grooves 22 evenly distributed circumferentially. The presence of multiple evenly distributed grooves increases the surface area of ​​channel 2, allowing more flue gas to contact the channel as it passes through, thus improving the cooling effect. Furthermore, the multiple grooves also facilitate the coating and firm adhesion of cooling materials to the wall surface.

[0044] In some embodiments, such as Figure 7As shown, the cross-section of channel 2 is pentagonal. Setting the cross-section of channel 2 to a pentagonal shape can improve the distinctiveness and aesthetics of the shape of the empty tube filter rod after the filter nozzle is formed. The formed groove 22 is also sharper, making it easier for the cooling material to adhere. This can effectively increase the area of ​​the wall surface of channel 2 and the firm adhesion of the coated cooling material to the wall surface.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A hollow tube filter rod for cigarettes, characterized in that, include: A strip-shaped filter rod body includes a strip-shaped channel located in its middle portion, the channel extending through the filter rod body; A cooling material, coated on the wall of the channel, is configured to contact and cool the flue gas as it passes through the channel.

2. The empty tube filter rod for cigarettes as described in claim 1, characterized in that, The cooling material is configured such that, before contact with flue gas, it is a solid or paste, and during contact with and cooling of the flue gas, it changes from a solid or paste to a liquid; or, before contact with flue gas, it is a liquid.

3. The empty tube filter rod for cigarettes as described in claim 2, characterized in that, The cooling material is polyethylene glycol 4000 or propylene glycol.

4. The empty tube filter rod for cigarettes as described in claim 1, characterized in that, The cooling material includes a cooling strip extending axially along the channel.

5. The empty tube filter rod for tobacco as described in claim 1, characterized in that, The cooling material includes a plurality of cooling strips extending axially along the channel, and the plurality of cooling strips are evenly distributed circumferentially along the channel.

6. The empty tube filter rod for cigarettes as described in claim 1, characterized in that, The cooling material covers the walls of the channel.

7. The empty tube filter rod for tobacco as described in any one of claims 1 to 6, characterized in that, It also includes fragrance substances mixed in the cooling material.

8. The empty tube filter rod for tobacco as described in any one of claims 1 to 6, characterized in that, The filter rod body is made of cellulose acetate filament bundles, and the empty tube filter rod for cigarettes also includes forming paper that wraps the filter rod body from the outside.

9. The empty tube filter rod for tobacco as described in any one of claims 1 to 6, characterized in that, The cross-sectional shape of the channel is non-circular.

10. The empty tube filter rod for tobacco as described in claim 9, characterized in that, The channel includes a plurality of grooves evenly distributed along the circumference.

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