Filter tip

Abstract

The utility model provides a filter tip which comprises a filter element material and a surface layer. The filter element material comprises a non-spinning net layer and a paper pulp layer. The non-spinning net layer comprises a plurality of first fibers and a plurality of meshes, the first fibers are combined with one another, and the meshes are located between the first fibers. The paper pulp layer comprises a plurality of plant fibers, parts of the plant fibers are located on one side of the non-spinning net layer, and parts of the plant fibers penetrate through the meshes and are wound on the first fibers. And the surface layer covers the periphery of the filter element material.

Description

Technical Field

[0001] This application relates to filters, and more particularly to a filter for use in smoking products. Background Technology

[0002] When tobacco products burn, they produce particles containing a large number of chemical components. Most of these particles are products of the combustion or incomplete combustion of tobacco in the tobacco product. In order to reduce the amount of smoke, tar, or various suspended particles produced during combustion that users inhale after using tobacco products, tobacco filters have been developed to absorb harmful substances and impurities produced after the tobacco products burn.

[0003] Previously, the raw material for cigarette filters was cellulose derived from wood. Cellulose was acetylated (to become cellulose acetate, or simply "acetate"), dissolved, and then separated into continuous bundles of synthetic fibers. The cellulose then underwent chemical and physical processes, including unpacking, carding, plasticizing, shaping, and cutting, to become the filter. To meet the requirements for particle adsorption and filtration, the wood species used to obtain cellulose for filter production had to undergo strict selection. Therefore, filters made from cellulose acetate were extremely expensive, deterring users and hindering sales, thus requiring improvement. Utility Model Content

[0004] This application provides a filter tip, comprising a filter element material and a surface layer. The filter element material comprises a nonwoven mesh layer and a pulp layer. The nonwoven mesh layer comprises a plurality of first fibers and a plurality of mesh openings, wherein the first fibers are bonded together and the mesh openings are located between the first fibers. The pulp layer comprises a plurality of plant fibers, with portions of the plant fibers located on one side of the nonwoven mesh layer, and portions of the plant fibers passing through the mesh openings and entangled with the first fibers. The surface layer covers the outer periphery of the filter element material.

[0005] In some embodiments, the aforementioned first fiber comprises a plurality of polypropylene fibers.

[0006] In some embodiments, the aforementioned polypropylene fibers account for less than 45% of the weight percentage of the filter element material.

[0007] In some embodiments, the filter tip also includes multiple softening particles that are uniformly distributed on the surface of the filter element material.

[0008] In some embodiments, the aforementioned softening particles account for 1.0 to 15.0% of the weight of the filter element material.

[0009] In some embodiments, the aforementioned first fiber comprises a plurality of wood fibers.

[0010] In some embodiments, the aforementioned filter tip further includes a functional carrier disposed within the filter element material.

[0011] In some embodiments, the aforementioned filter tip also includes fragrance crystal balls disposed within the filter element material.

[0012] In some embodiments, the aforementioned filter tip has a hardness of 70% or higher.

[0013] In some embodiments, the aforementioned filter tip has an air intake resistance of 120–800 mmWG, and the length of the filter tip is 60–160 mm and the diameter is 16–25 mm.

[0014] In some embodiments, the aforementioned filter material has a liquid absorption rate of ≥230%. Attached Figure Description

[0015] Figure 1 This is a schematic diagram illustrating an embodiment of the filter tip of this application applied to a smoking product;

[0016] Figure 2 This is an exploded view of an embodiment of the filter of this application;

[0017] Figure 3 This is a schematic diagram showing the nonwoven mesh layer and pulp layer before they are solidified in one embodiment of the filter tip of this application;

[0018] Figure 4 This is a partial cross-sectional view of an embodiment of the filter nozzle of this application;

[0019] Figure 5 for Figure 4 A magnified view of a portion of point 5 selected in the middle circle;

[0020] Figure 6 This is a schematic diagram of an embodiment where the functional carrier of the filter tip in this application is a fragrance-carrying thread;

[0021] Figure 7 for Figure 4 A magnified view of a portion of point 7 in the center circle;

[0022] Figure 8 This is a schematic diagram of an embodiment of the filter tip of this application containing fragrance crystal balls.

[0023] [Symbol Explanation]

[0024] F: Filter tip

[0025] C: Tobacco products

[0026] 10: Filter element material

[0027] 11: Non-woven mesh layer

[0028] 111: First Fiber

[0029] 112: Mesh

[0030] 12: Pulp layer

[0031] 121: Plant Fiber

[0032] 20: Surface

[0033] 30: Softening particles

[0034] 40: Functional Carrier

[0035] 50: Scented Crystal Balls

[0036] W: Water column Detailed Implementation

[0037] Before this application is described in detail in its various embodiments, please note that the accompanying drawings in the following description are for illustrative purposes only, and are not necessarily drawn to scale, and not all details are necessarily shown in the drawings.

[0038] The directions or similar terms used in this application, such as "front", "back", "left", "right", "top", "bottom", "inner", "outer", "side", etc., are mainly for reference to the directions in the accompanying drawings. These directions or similar terms are only used to assist in the explanation and understanding of the various embodiments of this utility model and are not intended to limit this utility model.

[0039] The use of the quantifiers “a” or “an” for the elements and components described in this application is for convenience and to provide the general meaning of the scope of this utility model; in this utility model, it should be interpreted as including one or at least one, and a single concept also includes multiple cases, unless it clearly means otherwise.

[0040] The terms “combination,” “integration,” or “assembly” used in this case mainly include those that can be separated without damaging the components after connection, or those that make the components inseparable after connection. These are terms that those with ordinary knowledge in the art can choose based on the material of the components to be connected or the assembly requirements.

[0041] See Figure 1 , Figure 1 This is a schematic diagram illustrating an embodiment of the filter tip of this application applied to a smoking article. The filter tip F of this application is suitable for filtering smoking article C, thereby reducing tar ingested during use of smoking article C and suspended particles generated during combustion. Smoking article C is an article containing aerosol-generating substances or aerosol-forming matrices, which produces aerosols upon combustion, such as cigarettes, heated tobacco, or cigars. Furthermore, smoking article C may also contain solid materials based on tobacco raw materials, such as recycled tobacco, pipe tobacco, and reconstituted tobacco. The smoking substances may contain volatile compounds.

[0042] See Figures 1 to 4 , Figure 2 This is an exploded view of an embodiment of the filter of this application; Figure 3 This is a schematic diagram showing the nonwoven mesh layer and pulp layer before they are solidified in one embodiment of the filter tip of this application; Figure 4 This is a partial cross-sectional view of an embodiment of the filter nozzle of this application; Figure 5 for Figure 4 A partially enlarged schematic diagram of area 5 in the center circle. The filter tip F of this application includes a filter element material 10 and a surface layer 20. The filter element material 10 includes a nonwoven mesh layer 11 and a pulp layer 12. The nonwoven mesh layer 11 includes a plurality of first fibers 111 and a plurality of mesh openings 112, with each first fiber 111 bonded together and each mesh opening 112 located between each first fiber 111. The pulp layer 12 includes a plurality of plant fibers 121, with portions of the plant fibers 121 located on one side of the nonwoven mesh layer 11, and portions of the plant fibers 121 passing through each mesh opening 112 and entangled with each first fiber 111. The surface layer 20 covers the periphery of the filter element material 10.

[0043] In this way, the plant fibers 121 of the pulp layer 12 pass through the mesh 112 and become entangled with each of the first fibers 111, thereby ensuring that the first fibers 111 and the plant fibers 121 are firmly bonded together. In addition, it can provide suitable hardness to ensure that the filter core material 10 composed of the nonwoven mesh layer 11 and the pulp layer 12 can have suitable hardness after being rolled into a filter tip F.

[0044] See Figure 2 and Figure 4 The filter element material 10 is the main component providing the filtration effect. In some embodiments, the non-woven mesh layer 11 is a non-woven fabric layer, i.e., a fabric-like structure layer that is not woven from threads. In these embodiments, the first fibers 111 may, but are not limited to, be oriented or randomly arranged to form a mesh structure and mesh openings 112. In some embodiments, the first fibers 111 of the non-woven mesh layer 11 may, but are not limited to, be reinforced and bonded together by physical, mechanical, thermal, or chemical methods.

[0045] See Figures 2 to 4 The pulp layer 12 is made of plant fibers 121 obtained by defibering and beating plants, and then formed into a layered structure after pulp preparation and web forming. It is worth noting that because the plant fibers 121 have undergone the beating process, when the plant fibers 121 are made into the pulp layer 12, the lengths and directions of the plant fibers 121 are different.

[0046] See Figures 2 to 4 In some embodiments, the nonwoven mesh layer 11 and the pulp layer 12 are reinforced and bonded together by a hydroentangling process (also known as water weaving or water needle method) to form the filter core material 10. See also [reference to other embodiments]. Figure 3The pulp layer 12 is superimposed on the nonwoven mesh layer 11, and then a high-pressure micro-water jet W is sprayed onto the pulp layer 12, causing some of the plant fibers 121 in the pulp layer 12 to pass through the mesh 112 of the nonwoven mesh layer 11 and become entangled with the first fiber 111 of the nonwoven mesh layer 11 (e.g., ...). Figure 4 (As shown), thereby bonding the pulp layer 12 to the nonwoven mesh layer 11 and forming the filter core material 10.

[0047] In this way, since at least a portion of the filter element material 10 is composed of a pulp layer 12, the nonwoven mesh layer 11 can stably support the pulp layer 12, ensuring that the filter element material 10 composed of the pulp layer 12 and the nonwoven mesh layer 11 has a stable structural configuration. Furthermore, the pulp layer 12 can improve the biodegradation rate and reduce the environmental harm of the filter tip F. Moreover, since the filter element material 10 is composed of the nonwoven mesh layer 11 and the pulp layer 12, the hardness of the filter tip F can be adjusted by the proportion of components and the amount of filter element material 10 added. This ensures that the filter tip F has appropriate hardness to meet consumer requirements and facilitate cigarette rolling. In some embodiments, the hardness of the filter tip F is ≥70% (under the condition that the filter tip F is 60–160 mm in length and 16–25 mm in diameter). Therefore, the hardness of filter tip F is the degree to which the diameter of filter tip F is maintained when a certain level of force is applied to filter tip F radially. Its numerical calculation method is: Filter tip F hardness (%) = [(D0-D1) / D0] × 100. Where D0 is the initial diameter of filter tip F; D1 is the diameter of filter tip F after being pressed with a specific weight. Generally, D1 is the diameter of filter tip F after being pressed with a weight of 300 grams.

[0048] In some embodiments, the mass per unit area of ​​the filter element material 10 is 30±15 g / m². 2 In these embodiments, the mass per unit area can be measured by the method specified in ISO standard 9073-1. In some embodiments, the thickness of the filter element material 10 is ≥0.1 mm. In these embodiments, the thickness of the filter element material 10 can be measured by the method specified in the People's Republic of China National Standard GB / T24218.2-2009.

[0049] In some embodiments, based on the structural configuration of the filter element material 10 of the filter tip F, the dry transverse tensile strength (CD dry) of the filter element material 10 is ≥5N; the dry longitudinal tensile strength (MD dry) is ≥10N; the dry transverse elongation (CD dry) is ≤200%; and the dry longitudinal elongation (MD dry) is ≤150%. In these embodiments, the dry transverse tensile strength, dry longitudinal tensile strength, dry transverse elongation, and dry longitudinal elongation can all be measured using the methods specified in the People's Republic of China National Standard GB / T24218.3-2010. This avoids breakage of the filter element material 10 during the rolling process, reducing manufacturing difficulty.

[0050] In some embodiments, the filter element material 10 of the filter tip F has a liquid absorption capacity of ≥230% due to its structural configuration. In these embodiments, the liquid absorption capacity of the filter element material 10 can be measured using the method specified in the People's Republic of China National Standard GB / T 24218.6-2010. This ensures that the filter tip F can adequately absorb water vapor, other harmful substances, and impurities produced after the combustion of the smoking product C, thereby improving the user experience when inhaling the smoking product C.

[0051] In some embodiments, the structural configuration of the filter element material 10 of the filter nozzle F results in an intake resistance (pressure drop) of 120–800 mmWG (measured when the filter nozzle F is 60–160 mm in length and 16–25 mm in diameter), thereby providing a better user experience. Intake resistance refers to the static pressure difference between the two ends of the filter nozzle F when the volumetric flow rate is traversed by the airflow at the discharge end under normal conditions of 17.5 mm / s. In these embodiments, the intake resistance can be measured using the method specified in ISO standard 6565:2015.

[0052] In some embodiments, the hardness of the filter tip F can also be controlled by changing the mass per unit area of ​​the surface layer 20. In some embodiments, the mass per unit area of ​​the surface layer 20 is 20–150 g / m². 2 .

[0053] In some embodiments, the moisture content of the filter element material 10 is ≤16%. In these embodiments, the moisture content of the filter element material 10 can be measured by the method specified in the National Standard of the People's Republic of China GB / T 462-2003.

[0054] The first fibers 111 of the nonwoven mesh layer 11 may comprise the same or different fibers. In some embodiments, each of the first fibers 111 may be one of polypropylene fibers or wood fibers, or a combination of polypropylene fibers and wood fibers.

[0055] In some embodiments where the first fiber 111 of the nonwoven mesh layer 11 is a combination of polypropylene fiber and wood fiber, the polypropylene fiber accounts for less than 45% of the weight percentage of the filter core material 10. That is, in these embodiments, the polypropylene fiber accounts for at most 45% of the weight percentage of the filter core material 10, and the remainder is composed of wood fiber and pulp layer 12, thereby ensuring the overall biodegradability of the filter tip F and improving its environmental friendliness.

[0056] In some embodiments, the first fiber 111 of the nonwoven mesh layer 11 is wood fiber. Thus, the filter tip F is composed of the wood fiber of the nonwoven mesh layer 11 and the plant fiber 121 of the pulp layer 12. The plant fiber 121 of the pulp layer 12 can also pass through each mesh 112 and entangle with the wood fiber type of the first fiber 111. In this way, the filter core material 10 can be ensured to have a stable structural form, the filter tip F can have suitable hardness, and better biodegradability and environmental friendliness can be provided under the structural configuration of the nonwoven mesh layer 11 and the pulp layer 12 being entangled with each other.

[0057] In some embodiments, the filter tip F is cylindrical in shape. Therefore, in the manufacturing process of the filter tip F, after the nonwoven mesh layer 11 and pulp layer 12 of the filter element material 10 are solidified, they need to be rolled into a cylindrical shape. In some embodiments where the first fiber 111 of the nonwoven mesh layer 11 contains polypropylene fibers, to ensure that the filter element material 10 can be smoothly rolled into a cylindrical shape and achieve the required roundness, see [reference needed]. Figure 4 and Figure 5 , Figure 5 for Figure 4 A magnified view of a portion of the central circle 5. The filter tip F also contains multiple softening particles 30, which are located on the surface of the filter core material 10. These softening particles 30 ensure that the filter tip F has a specific hardness after the filter core material 10 is rolled to facilitate cigarette rolling. In addition, the softening of the filter core material 10 can further improve the smoking effect and more effectively adsorb impurities.

[0058] In some embodiments where the filter tip F includes softening particles 30, the softening particles 30 constitute 1.0% to 15.0% of the filter element material 10 by weight, ensuring that the filter element material 10 can be smoothly rolled and formed while maintaining the required rigidity. In some embodiments, the softening particles 30 are triacetin, but this invention is not limited to this. In these embodiments, the softening particles 30 are uniformly distributed on the filter element material 10 by spraying.

[0059] See Figure 6 and Figure 7 , Figure 6 This is a schematic diagram of an embodiment where the functional carrier of the filter tip in this application is a fragrance-carrying thread; Figure 7 for Figure 4 A partially enlarged schematic diagram of area 7 (center circle). In some embodiments, the filter tip F further includes a functional carrier 40, uniformly distributed on the surface of the filter element material 10. In these embodiments, the functional carrier 40 is located on the surface of the filter element material 10 and exists within the filter tip F after being rolled into the filter tip F. In some embodiments, the number of functional carriers 40 is not limited to one or more, and the functional carrier 40 may be, but is not limited to, activated carbon, diatomaceous earth, fragrance-carrying particles, or fragrance-carrying threads, thereby providing additional functionality to the filter tip F.

[0060] In some embodiments where the functional carrier 40 is a fragrance-carrying thread, the number of functional carriers 40 is singular (e.g., ...). Figure 6 As shown), in these embodiments, the fragrance-carrying functional carrier 40 is elongated and passes through the filter core material 10 along the axial direction of the filter tip F. In some embodiments where the functional carrier 40 is activated carbon, diatomaceous earth, or fragrance-carrying particles, the number of functional carriers 40 is multiple (e.g., ...). Figure 7 As shown in these embodiments, the functional carrier 40 is uniformly distributed on the surface of the filter core material 10, that is, inside the filter nozzle F.

[0061] See Figure 8 , Figure 8 This is a schematic diagram of an embodiment of the filter tip of this application that includes fragrance crystal balls. In some embodiments, the filter tip F further includes fragrance crystal balls 50, which are disposed within the filter core material 10 of the filter tip F. In these embodiments, the fragrance crystal balls 50 are located within the filter tip F. This allows the user to inhale different fragrances when using the filter tip F. In some embodiments where the filter tip F includes fragrance crystal balls 50, the number of fragrance crystal balls 50 is one or two, and this application is not limited to this.

Claims

1. A filter tip, characterized in that, Include: One filter element material includes: A nonwoven mesh layer comprising a plurality of first fibers and a plurality of mesh openings, wherein the plurality of first fibers are bonded together and each mesh opening is located between the respective first fibers; and A pulp layer comprising a plurality of plant fibers, portions of which are located on one side of the nonwoven mesh layer, portions of which pass through the mesh openings and are entangled with the plurality of first fibers; and A surface layer, covering the outer periphery of the filter element material.

2. The filter tip as described in claim 1, characterized in that, The plurality of first fibers comprise a plurality of polypropylene fibers.

3. The filter tip as described in claim 2, characterized in that, The plurality of polypropylene fibers account for less than 45% of the weight percentage of the filter element material.

4. The filter tip as described in claim 2, characterized in that, It also contains multiple softening particles, which are evenly distributed on the surface of the filter material.

5. The filter tip as described in claim 4, characterized in that, The plurality of softening particles account for 1.0 to 15.0% of the weight of the filter element material.

6. The filter tip as described in claim 1, characterized in that, The plurality of first fibers comprise a plurality of wood fibers.

7. The filter tip as described in claim 1, characterized in that, It also includes a functional carrier disposed inside the filter.

8. The filter tip as described in claim 1, characterized in that, It also includes a fragrance crystal ball, which is placed inside the filter.

9. The filter tip as described in claim 1, characterized in that, It has a hardness of 70% or higher.

10. The filter tip as claimed in claim 1, characterized in that, It has an air intake resistance of 120 to 800 mmWG, and the length of the filter is 60 mm to 160 mm and the diameter is 16 to 25 mm.

11. The filter tip as claimed in claim 1, characterized in that, The filter element material has a liquid absorption rate of ≥230%.

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