A high-throughput porous material, preparation method and its structure

Abstract

The present invention discloses a high-throughput porous material, a preparation method and its structure, which comprise the following components: 100 parts of a formed substrate, 90-110 parts of an auxiliary solution, and 8-15 parts of a pore-forming precursor. Based on the basic principle of etching, irregular pores are constructed in the material, and the pores can be used for filling powder or liquid flavor substances. After a cigarette filter rod is prepared by using this material, on the one hand, due to the multi-pore structure, the interception area of the smoke is increased, further achieving the effect of reducing tar and harm; on the other hand, after the smoke passes through the pores, more flavor substance components can be carried away, comprehensively achieving the effect of reducing tar and increasing fragrance.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarette filter rods and filter materials, and more particularly to a high-throughput porous material, a preparation method and a structure thereof. Background Art

[0002] Filter rods are an important component of cigarettes. They can not only significantly reduce discomfort such as choking and coughing during smoking, but also effectively adsorb and intercept harmful components in the mainstream cigarette smoke, such as tar, phenolic compounds, benzene compounds, etc., thereby reducing the harm caused by smoking to human health.

[0003] Currently, the majority of cigarette filter plug fillers on the market are made of standard diacetate and polypropylene fiber tow. This material has a significant disadvantage during the filter plug molding process: additional flavors and fragrances cannot be added directly to the tow, requiring the addition of popping beads or scented threads, which creates difficulties in production and processing. Furthermore, with increasing health awareness, the development of low-tar, low-hazard cigarettes has become a key trend. Traditional diacetate tow has a tar reduction limit, necessitating the need for filter materials with strong harmful substance retention capabilities and the ability to directly carry added flavors. This can further address the need for cigarettes with reduced tar and enhanced flavor. Summary of the Invention

[0004] To this end, the present invention provides a high-throughput porous material, a preparation method and a structure thereof, in order to solve the technical problems in the background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A high-throughput porous material comprises the following components, calculated by weight: 100 parts of a forming substrate, 90-110 parts of an auxiliary solution, and 8-15 parts of a pore-forming precursor.

[0007] The present invention aims to provide a high-throughput porous material primarily formed from a cellulose-based material that fully utilizes waste tobacco leaves and stems. This material can be used as a filler material to roll filter rods. The material has micropores of varying sizes, increasing the interception area for smoke and absorbing more harmful substances.

[0008] In some embodiments, the shaped substrate is a cellulose-based material.

[0009] In some embodiments, the auxiliary solution includes 2-4 parts of adhesive, 1-2 parts of dispersant, 2-4 parts of tobacco flavoring, and 90-95 parts of water.

[0010] In some embodiments, the pore-forming precursor comprises one of calcium carbonate and magnesium carbonate powder.

[0011] This embodiment also provides a method for preparing a high-throughput porous material, comprising the following steps:

[0012] S1: Crushing the formed substrate, and simultaneously adding an auxiliary solution and a pore-forming precursor to prepare a homogenized slurry;

[0013] S2: Uniformly coating the obtained slurry onto a heated stainless-steel belt and drying it at a low temperature to form a film;

[0014] S3: Subjecting the above-mentioned film to a low-pressure permeation treatment with saturated acetic acid vapor in a closed space at 70 - 90 °C for 3 - 5 h, and finally taking it out and drying it in an environment of 45 - 60 °C for 1 - 2 h to obtain the high-throughput porous material.

[0015] In the step S1, the mesh number of the crushed formed substrate is 400 - 800 meshes, the viscosity of the auxiliary solution is 200 - 3000 mPa·s, and the mesh number of the pore-forming precursor is 5000 - 7000 meshes.

[0016] In the step S2, the heating temperature on the stainless-steel belt is 50 - 65 °C, and the drying time is 30 min - 60 min.

[0017] This embodiment also provides a high-throughput porous material structure, which is realized based on the above-mentioned high-throughput porous material, comprising a matrix, and a plurality of through holes are provided on the matrix.

[0018] Another object of the present invention is to provide a microporous structure, which provides the possibility for the secondary flavoring of the material.

[0019] In some embodiments, the size of the pore channels is 2 - 5 microns. At this size, it can not only ensure that the amount of smoke is not overly reduced, but also ensure that some harmful substances with larger particle sizes are intercepted and adsorbed when passing through the pore channels, achieving the effect of reducing tar and harmful substances.

[0020] In some embodiments, the air permeability of the high-throughput porous material structure is 20000 - 40000 CU; within this air permeability range, it can ensure that the mainstream cigarette smoke can smoothly penetrate the filter rod filling material. The preferred air permeability is 28000 CU. The grammage is 140 - 190 g / m2, and the thickness is 0.20 - 0.35 mm. Within this parameter range, the material can meet the requirements of being a filter rod filler and provide a better filling effect for the filter rod. The preferred grammage is 160 g / m2, and the thickness is 0.30 mm.

[0021] Furthermore, when the high-throughput porous material is used as a filter rod filling material, additional flavor can be added thereto, and then it can be rolled into a filter rod, which can endow the cigarette with a more intense flavor sensory experience.

[0022] In summary, the present invention has the following beneficial effects:

[0023] A high-throughput porous material, a preparation method thereof and a structure thereof provided by the present invention have micropores of different sizes on the material, so as to increase the contact specific surface area between the material and the flue gas, extend the contact time of the flue gas with the material, increase the flue gas interception amount, adsorb more harmful substances in the flue gas, and achieve a better tar reduction effect. At the same time, the porous structure makes it possible to add essence externally for the second time. When essence and fragrance are added thereto, more essence will be retained in the pores, and the flavor substance components can be carried away by the flue gas, achieving the effect of flavor supplement and enhancement. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of a high-throughput porous material;

[0025] Figure 2 It is a schematic diagram of the application of a high-throughput porous material rolled into a filter rod on a cigarette; wherein, the part with diagonal hatching is the structure of the high-throughput porous material; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar components or components with the same or similar functions throughout. The described embodiments are some but not all of the embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application and should not be construed as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0027] The embodiments of the present application will be described in detail below with reference to the drawings.

[0028] In the description of the present application, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, or an indirect connection through an intermediate medium, or the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0029] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0030] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or display comprising a series of steps or units need not be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or displays.

[0031] The following will be combined with Figure 1-2 to elaborate in detail on a high-throughput porous material, its preparation method and its structure involved in the embodiments of the present application. It should be noted that the following embodiments are only used to explain the present application and do not constitute a limitation to the present application.

[0032] The object of the present invention is to provide a high-throughput porous material, its preparation method and its structure. Based on the basic principle of etching, irregular pores are constructed in the material, and these pores can be used for filling powder or liquid flavor substances. After a cigarette filter rod is prepared using this material, on the one hand, due to the porous structure, the interception area of the flue gas is increased, further achieving the effect of reducing tar and harm; on the other hand, after the flue gas passes through the pores, more flavor substance components can be carried away, comprehensively achieving the effect of reducing tar and enhancing fragrance.

[0033] Refer to Figure 1 A high-throughput porous material provided by the present invention includes a matrix and pores. The pores are located inside the matrix and include various forms such as semi-penetrating and fully penetrating. In principle, the pores are of an irregular structure, but special cases of regular arrangement are not excluded.

[0034] Refer to Figure 2 A high-throughput porous material provided by an embodiment of the present invention is rolled into a filter rod as a filter rod filling material, and this filter rod is used as a filter tip for filtering cigarette sticks. When the cigarette stick is lit and the mainstream smoke flows through this filter rod, it will be intercepted by a high-throughput porous material. The pores located on the matrix effectively ensure that the flue gas can pass through and freely disperse, and harmful substances in the flue gas can be more adsorbed, achieving the effect of reducing tar.

[0035] Example 1:

[0036] This embodiment provides a high-throughput porous material, including a matrix and pores. The pores are located inside the matrix and can be achieved by etching the matrix, including various forms such as semi-through and full-through. In principle, the pores are of irregular structure.

[0037] Specifically, for the high-throughput porous material, the size of the pores is 2 to 3 microns, the air permeability is 23000 CU, the grammage is 160 g / m2, and the thickness is 0.20 mm. The forming substrate is tobacco stem, and the particle size after grinding is 500 mesh; the auxiliary solution includes 2 parts of adhesive, 1 part of dispersant, 2 parts of tobacco flavor, and 95 parts of water; the pore-forming precursor is calcium carbonate powder with a mesh size of 7000. Calculated by weight, there are 100 parts of the forming substrate, 90 parts of the auxiliary solution, and 10 parts of the forming precursor.

[0038] This embodiment also provides a preparation method of the high-throughput porous material, including the following steps:

[0039] S1. Use tobacco stem as the forming substrate and crush it.

[0040] S2. Prepare the auxiliary solution. Obtain the adhesive, dispersant, tobacco flavor, and water in proportion, and fully mix the above substances to obtain the auxiliary solution.

[0041] S3. Prepare the slurry, and fully stir the previously obtained forming substrate, auxiliary solution, and pore-forming precursor in proportion to obtain a homogenized slurry.

[0042] S4. Uniformly coat the obtained slurry on a heated stainless steel belt and dry it at a low temperature to form a film. The temperature is set at 50 °C, and the drying time is 60 min.

[0043] S5. Treat the above film with saturated acetic acid vapor at 85 °C in a closed space for 4.5 h, and finally take it out and dry it at 50 °C for 2 h to obtain the high-throughput porous material.

[0044] Example 2

[0045] This embodiment provides a high-throughput porous material, including a matrix and pores. The pores are located inside the matrix, including various forms such as semi-through and full-through. In principle, the pores are of irregular structure.

[0046] Specifically, the high-throughput porous material has a pore size of 3-5 microns, an air permeability of 30,000 CU, a gram weight of 130 g / m², and a thickness of 0.33 mm. The forming substrate is tobacco stems, ground to a 700-mesh particle size. The auxiliary solution comprises 3 parts adhesive, 1 part dispersant, 3 parts tobacco flavoring, and 93 parts water. The pore-forming precursor is 5000-mesh calcium carbonate powder. The weight ratio is 100 parts forming substrate, 100 parts auxiliary solution, and 9 parts forming precursor.

[0047] This embodiment also provides a method for preparing a high-throughput porous material, comprising the following steps:

[0048] S1. Using tobacco stems as a forming substrate for crushing.

[0049] S2. Prepare an auxiliary solution: Obtain an adhesive, a dispersant, a tobacco flavoring, and water in appropriate proportions, and thoroughly mix the above substances to obtain an auxiliary solution.

[0050] S3. Prepare slurry, and fully stir the previously obtained forming substrate, auxiliary solution and pore-forming precursor according to proportion to obtain a homogenized slurry.

[0051] S4. The slurry obtained above is evenly coated on a heated stainless steel belt and dried at low temperature to form a film. The temperature is set to 60° C. and the drying time is 45 minutes.

[0052] S5. The membrane was subjected to a permeation treatment using saturated acetic acid vapor at 80° C. in a closed space for 5 hours. The membrane was then taken out and dried at 55° C. for 1.5 hours to obtain a high-flux porous material.

[0053] Example 3

[0054] This embodiment provides a high-throughput porous material, comprising a matrix and pores. The pores are located inside the matrix and may be semi-through, fully through, or in other forms. The pores are generally irregular in structure.

[0055] Specifically, the high-throughput porous material has a pore size of 3-4 microns, an air permeability of 28,000 CU, a gram weight of 190 g / m², and a thickness of 0.35 mm. The forming substrate is tobacco stems, ground to a 700-mesh particle size. The auxiliary solution comprises 4 parts adhesive, 2 parts dispersant, 4 parts tobacco flavoring, and 90 parts water. The pore-forming precursor is 6,000-mesh calcium carbonate powder. By weight, the forming substrate comprises 100 parts, the auxiliary solution 90 parts, and the forming precursor 14 parts.

[0056] This embodiment also provides a method for preparing a high-throughput porous material, comprising the following steps:

[0057] S1. Use tobacco stems as the forming substrate and crush them.

[0058] S2. Prepare the auxiliary solution. Obtain the adhesive, dispersant, tobacco flavor, and water in proportion, and fully mix the above substances to obtain the auxiliary solution.

[0059] S3. Prepare the slurry. Stir the previously obtained forming substrate, auxiliary solution, and pore-forming precursor in proportion to obtain a homogenized slurry.

[0060] S4. Uniformly coat the obtained slurry onto a heated stainless steel belt and dry it at a low temperature to form a film. The temperature is set at 50 °C, and the drying time is 60 min.

[0061] S5. Treat the above film with saturated acetic acid vapor at 90 °C in a closed space for 5 h, and finally take it out and dry it in an environment at 45 °C for 2 h to obtain a high-flux porous material.

[0062] Comparative Example

[0063] Comparative Example 1: Prepare the high-flux porous material in the same manner as in Example 1, except that the treatment with saturated acetic acid vapor is not carried out during the preparation process.

[0064] Experimental Example 1

[0065] Use Example 1 and Comparative Example 1 as filter rod fillers respectively for the trial production of filter rods. At the same time, compound them with ordinary filter rods to form composite filter rods, and use them as filter tips for cigarettes. See Figure 2 . Analyze the main flue gas components of the two cigarettes by means of simulated puffing and GC / MS. The specific detection results are shown in Table 1. Before and after puffing, the changes in the relative proportions of the chemical components of the materials in Example 1 and Comparative Example 1 are shown in Table 2.

[0066] Table 1 Detection Results

[0067] Example 1 Comparative Example 1 Tar (mg) 3 8 Nicotine (mg) 5 8 Carbon monoxide (mg) 3 8

[0068] As can be seen from Table 1, compared with Comparative Example 1, due to the high-flux porous design in Example 1, it can adsorb more harmful substances such as tar and carbon monoxide in the flue gas, achieving the effect of reducing tar and harm.

[0069] Table 2 Detection Results

[0070]

[0071]

[0072] As can be seen from Table 2, comparing the component ratios after suction, the relative retention amounts of aldehydes, phenols, olefins, and alkanes in Example 1 after suction are greater than those in Comparative Example 1 to varying degrees, indicating that when the high-flux porous material is applied to cigarette rods, it can significantly increase the retention of harmful substances.

[0073] Experimental Example 2

[0074] Equal amounts of flavor were added to Example 1 and Comparative Example 1, and after natural equilibration for 3 days, they were used as filter rod fillers for the trial production of filter rods. At the same time, they were combined with ordinary filter rods to form composite filter rods, which were used as filter tips for cigarette rods. The sensory evaluation of the cigarette rods was carried out by a panel of sensory evaluation experts in accordance with the regulations of the international GB5606.4-2005 Cigarette Sensory Technology Requirements, with a focus on evaluating the aroma quantity. The results are shown in Table 3. Among them, the panel of sensory evaluation experts included 30 professionals and volunteers. The scoring was based on a full score of 10 points, and the final average value was taken.

[0075] Table 3 Scoring Results

[0076] Group Amount of aroma Example 1 9.52 Comparative Example 1 8.89

[0077] As can be seen from Table 3, the flavor of the cigarette rods with Example 1 applied is more intense sensorially. This is because due to the porous characteristics, more externally added flavor can be retained.

[0078] The above are all the preferred embodiments of the present invention, and do not limit the protection scope of the present invention in sequence. For those of ordinary skill in the art, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A high-throughput porous material, characterized in that: Calculated by weight parts, it includes the following components: 100 parts of a forming substrate, 90 - 110 parts of an auxiliary solution, and 8 - 15 parts of a pore-forming precursor; The forming substrate is a cellulose-based material; The auxiliary solution includes 2 - 4 parts of an adhesive, 1 - 2 parts of a dispersant, 2 - 4 parts of a tobacco flavor, and 90 - 95 parts of water; The pore-forming precursor includes one of calcium carbonate and magnesium carbonate powders.

2. A method for preparing a high-throughput porous material as described in claim 1, characterized in that: It includes the following steps: S1: Crush the forming substrate, and at the same time add the auxiliary solution and the pore-forming precursor to prepare a homogenized slurry; S2: Uniformly coat the obtained slurry onto a heated stainless steel belt and perform low-temperature drying to form a film; S3: Perform low-pressure permeation treatment on the above film in a closed space at 70 - 90 °C using saturated acetic acid vapor for 3 - 5 h, and finally take it out and perform drying treatment at 45 - 60 °C for 1 - 2 h to obtain a high-flux porous material.

3. The preparation method of a high-throughput porous material according to claim 2, wherein: In the step S1, the mesh number of the crushed forming substrate is 400 - 800 meshes, the viscosity of the auxiliary solution is 200 - 3000 mPa·s, and the mesh number of the pore-forming precursor is 5000 - 7000 meshes.

4. The preparation method of a high-throughput porous material according to claim 2, characterized in that: In the step S2, the heating temperature on the stainless steel belt is 50 - 65 °C, and the drying time is 30 min - 60 min.

5. A filter material, characterized in that: Based on the high-flux porous material described in claim 1, it includes a matrix, and a number of through pores are provided on the matrix.

6. The filter material according to claim 5, characterized in that: The size of the pores is 2 microns - 5 microns.

7. A filter material according to claim 5, characterized in that: The air permeability of the high-throughput porous material is 20,000 CU - 40,000 CU; the grammage is 140 - 190 g / m 2 , and the thickness is 0.20 - 0.35 mm.

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