CN112438429A - Cooling filter rod, preparation method and application thereof - Google Patents
Cooling filter rod, preparation method and application thereof Download PDFInfo
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- CN112438429A CN112438429A CN201910836369.9A CN201910836369A CN112438429A CN 112438429 A CN112438429 A CN 112438429A CN 201910836369 A CN201910836369 A CN 201910836369A CN 112438429 A CN112438429 A CN 112438429A
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- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 3
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- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/06—Use of materials for tobacco smoke filters
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/04—Tobacco smoke filters characterised by their shape or structure
Abstract
The invention relates to a cooling filter stick, a preparation method and application thereof. The cooling filter stick is of an integrated rod-shaped structure formed by bonding, curing and molding low-adsorption particles, has a stable network-shaped porous morphological characteristic, can provide a complex and smooth smoke channel, can greatly reduce the temperature of smoke entering an oral cavity on the premise of not adopting a ventilation and dilution means and is mainly based on a physical cooling principle, and the cooling filter stick prepared on the basis of the low-adsorption particle molding has small influence on smoke quantity and good smoking taste; the full-particle rod formed by curing the low-adsorption particles has a simple form and a novel structure, can realize industrial continuous production, has small suction resistance, and can adjust the suction resistance and the cooling amplitude.
Description
Technical Field
The invention relates to a cooling filter stick, a preparation method and application thereof, and belongs to the technical field of cigarette production.
Background
During conventional cigarette smoking, heat generated by the cigarette combustion cone is carried by the mainstream smoke to the filter, and as the cigarette smoking progresses, the temperature of the smoke passing through the filter increases progressively. Studies have shown that the smoke temperature at the filter end can be as high as 70-80 ℃ near the end of the puff, and that excessively high filter temperatures can affect the retention of the filter and also affect the consumer's sensory quality of the smoke. It is necessary to reduce the flue gas temperature appropriately.
Generally, the cigarette is heated by an external heating element to generate smoke, the tobacco product generally reaches an atomization condition at the temperature of 250-350 ℃, and in order to ensure that the smoke quantity generally requires low adsorption or even no adsorption at the filter tip end, the temperature of high-temperature atomized smoke entering the mouth cavity through the filter tip is higher than the combustion temperature of the traditional cigarette. Therefore, properly reducing the smoke temperature is also a key technology for developing low-temperature cigarettes.
Patent application CN2018104868613 that the applicant filed before relates to a cooling filter rod, is formed by the solidification shaping of cooling granule that the surface cladding has phase change material, and the cooling effect is outstanding, nevertheless because the body material itself that chooses for use has better adsorption efficiency, has great absorption to smog volume when being used for heating not burning cigarette and reduces, and the heat of storing in the phase change cooling in-process can't in time be dispelled simultaneously, can bring lip glowing sense during the smoking, has influenced the suction and has experienced.
Chinese patent specification CN101396173 discloses a method for cigarette vortex cooling and aroma-keeping and a cigarette structure thereof, wherein a vortex channel is arranged in front of a cigarette filter to achieve the effect of cooling, and the structure is complex and is not suitable for low-temperature heating and non-burning cigarettes.
Disclosure of Invention
One of the technical problems to be solved by the invention is that when cigarettes (including traditional cigarettes and low-temperature heating non-burning cigarettes) are smoked, the temperature of the smoke generated is higher, and the smoke has burning sensation to the oral cavity and/or lips of a consumer.
The second technical problem to be solved by the invention is that the smoke concentration and the feeling are poor when the temperature-reducing filter stick is subjected to perforation, ventilation, dilution and temperature reduction.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a cooling filter stick comprises a stick body, wherein the stick body is formed by bonding, solidifying and molding particles, pores are formed among the particles of the stick body, and the effective porosity of the stick body is 30-90%; the mass ratio of the polymer, the wax and the particle modified material in the particles is (20-100): (0-30) (0-50), wherein the polymer comprises at least one of polyethylene, ethylene/vinyl acetate copolymer, polyvinyl alcohol, polyethylene glycol, polyurethane, polyamide, polyesteramide, polylactic acid and polyethylene oxide, and the particle modification material comprises at least one of modified starch, stearic acid, palmitic acid, magnesium stearate, starch, microcrystalline cellulose, copper powder, iron powder, stainless steel powder and aluminum powder.
According to the invention, the cooling filter stick has a stable network-shaped porous structure and is formed by solidifying and molding cooling particles, a complex and continuous channel is arranged in the cooling filter stick, and after high-temperature flue gas enters the cooling filter stick from one end of the cooling filter stick, the high-temperature flue gas is rapidly dispersed in pores in the cooling filter stick and fully contacts with the particles for heat exchange, so that cooling is realized; compared with a straight-through type cooling filter stick, the relative stroke of the high-temperature smoke in the cooling filter stick is greatly prolonged, so that the energy attenuation is more, and the obtained cooling effect is better. In addition, in the invention, the particles contain more high molecular polymers or wax, can be blended, melted, extruded and granulated into particles with a closed chamber, have poor particle adsorptivity and have small influence on the adsorption of smoke amount and other aroma components in smoke; meanwhile, the device can play a part of phase change cooling role. In addition, the addition of the particle modification material can be helpful for granulation molding in extrusion spheronization granulation or play a role in absorbing heat and reducing temperature.
Further, in the particles, the mass ratio of the polymer to the wax to the particle modifying material is (25-95): (5-25) (5-50), further (30-90): (10-15)(15-35).
Further, the particles contain at least one polymer and/or wax having a melting point or softening point of 85 ℃ or lower, further 80 ℃ or lower, and the specific gravity of the polymer and/or wax in the particles is 30 to 90 wt%. On one hand, the requirement of further solidifying and forming the particles into particle rods can be met, and on the other hand, the cooling effect can be better exerted.
Further, the particles are densely spherical or nearly spherical.
Further, the particles have a particle size of 15-60 mesh, further 20-55 mesh, further 25-50 mesh, optionally a bulk density of 0.8-3.5g/ml, preferably 1.0-3.0 g/ml. The applicant finds that under the condition of the granularity, the filter stick has proper absorption resistance and internal porosity, and the higher bulk density enables the interior of the particle to be compact and the surface to have less holes, so that the adsorption performance of the particle is further reduced.
Further, the wax is at least one of paraffin wax, beeswax and carnuba wax.
Further, the surface of the rod body is wrapped with forming paper, and the air permeability of the forming paper is generally not lower than 6000CU, preferably more than 8000 CU. The high-transparency plug wrap or the plug wrap not containing the high-transparency plug wrap (the object photo is shown in figure 1) can obtain better ventilation degree far beyond other filter sticks, so that the cooling effect is further enhanced. The air permeability of the forming paper as high as possible can ensure that cold air enters from the cooling filter rod section, so that the cooling effect is better.
Based on the same inventive concept, the invention also provides a preparation method of the cooling filter stick, which comprises the following steps:
s1, preparation of particles: uniformly mixing the polymer, the wax and the particle modified material according to the proportion, granulating, drying and sieving to obtain particles with required particle size;
s2, molding: inputting the particles into a first die cavity for compression and stacking to obtain a blank body; inputting the blank into a second die cavity for heating treatment so as to bond particles in the blank; then, inputting the blank into a third die cavity, cooling, solidifying and cutting to obtain a rod body;
wherein the cross section of each die cavity is matched with the cross section of the rod body.
Further, in S1, the mixture is prepared into soft material by screw blending, melt extrusion, granulation, and spheronization, or a certain wetting agent is added, and then extrusion, spheronization and granulation are performed.
Further, in S1, the polymer, the wax, and the particle modifying material are all powders, and the particle size is 60 to 200 mesh, preferably 80 to 150 mesh.
Further, in S2, continuously passing the particles through at least three die cavity assemblies with consistent cross-sectional shapes and sizes by a conveyer belt, and sequentially compressing, stacking, heating and cooling the materials; cutting the filter rod according to a certain length after passing through all the die cavity assemblies to obtain a full-particle cooling filter rod with a stable structure; or further compounding with an acetate fiber rod, an empty tube paper rod and the like to obtain the cooling filter stick. Optionally, after cooling, the rod may be wrapped prior to cutting.
Further, the granules are compressed and accumulated in the first die cavity under negative pressure, and the whole cross section of the die cavity is filled. The compression and accumulation of the particles can ensure that the particle rod has better surface morphology and cuttability, and can also ensure better bonding and forming among the particles.
Further, the particles are wrapped by the conveying belt and sequentially pass through the first die cavity, the second die cavity and the third die cavity.
Further, in S2, the heating treatment is performed such that the particle temperature is 100-150 ℃, and further 100-120 ℃. The applicant researches repeatedly to find that controlling the proper temperature can ensure that the polymer or wax in the particles can soften to form bonding points, can also prevent the particles from softening or melting excessively, and ensure that point bonding is formed among the particles so as to solidify and form the rod body with uniformly distributed pores.
Further, the granules are cooled in a third die cavity, so that the temperature of the granule rod is reduced to below 50 ℃. Cooling to a proper temperature to solidify the bonding points formed by softening the particles and ensure the bonding between the particles to be firm and stable.
Based on the same inventive concept, the invention also provides the application of the cooling filter stick or the cooling filter stick prepared by the preparation method in cigarette products.
The cooling filter stick or the cooling filter stick prepared by the preparation method is applied to heating of non-combustible cigarette products.
Further, the cooling filter stick is connected with the tobacco shred section or the smoking section for suction, wherein the cooling filter stick is close to the tobacco shred/smoking section.
Compared with the prior art, the invention has the following beneficial effects:
1) the particles in the cooling filter stick are low adsorption materials, and the full-particle cooling stick prepared from the particles also has low adsorbability, low suction resistance and good controllability, is particularly suitable for cooling smoke of heating non-combustible cigarettes, and has the advantages of very obvious cooling effect, low adsorbability and good smoking experience;
2) the filter stick formed by adopting full particles is simple and novel in form, and the brand-new filter stick form can realize industrial production, and has low cost and good cooling effect;
3) the cooling filter stick is a full-particle stick, can not use wrap paper or use high-permeability wrap paper in a matched mode, has extremely high side air permeability, can ensure that cold air enters from the cooling filter stick section, and has a cooling effect similar to punching ventilation;
4) the smoke-absorbing filter stick has stable network-shaped porous morphological characteristics, can provide a complex and smooth smoke channel, can greatly reduce the temperature of smoke entering an oral cavity on the basis of the principle of physical cooling on the premise of not adopting a ventilation and dilution means, is less influenced by a cooling filter stick prepared by forming low-adsorption particles on the basis of smoke quantity, and has good smoking taste
5) The cooling filter stick is of an integrated solid structure formed by particles, the appearance form can be changed at will according to needs, the structure is stable, the filter stick is not required to be supported and shaped by forming paper, a large number of network-shaped complex and continuous channels are formed among the particles, and the smoothness of suction can be guaranteed while the cooling effect is guaranteed.
Drawings
Fig. 1 is a pictorial view of a stick of the present invention.
FIG. 2 is a front view of a mold cavity assembly of example 1 of the present invention.
FIG. 3 is a right side view of a mold cavity assembly of example 1 of the present invention.
In the figure, 1-the first mold cavity, 2-the second mold cavity, 3-the third mold cavity, 4-the cylindrical cavity.
Detailed Description
The following description describes alternative embodiments of the invention to teach one of ordinary skill in the art how to make and use the invention. Some conventional aspects have been simplified or omitted for the purpose of teaching the present invention.
Example 1
In this embodiment:
1) the preparation method of the cooling particles comprises the following steps: respectively taking 20 parts by mass of polyethylene of 80 meshes and 80 parts by mass of ethylene/vinyl acetate copolymer, uniformly mixing, blending, melting, extruding, granulating and rounding by using a commercial screw extruder, and taking 20-35 meshes of particles to obtain low-adsorption cooling particles, wherein the bulk density of the particles is 3.0 g/ml; 2) the preparation method of the cooling particle stick comprises the following steps: the prepared low-adsorption cooling particles are continuously and sequentially sent into three die cavity assemblies (the structural schematic diagram is shown in figure 2) distributed in series through a conveying belt, the center of each die cavity is a circular channel with the circumference of 23.5mm, negative pressure is arranged in a first die cavity to enable the particles to be compressed and stacked in the first die cavity, the first die cavity is wrapped by a cloth belt and then sent to a second die cavity with a heating device, the particles in the die cavity are heated to 120 ℃, the particle parts are softened and primarily bonded, the particles are further sent to a third die cavity to be cooled to below 45 ℃, the particles are re-hardened and solidified to form an integral particle rod, the integral particle rod is further cut into a cooling particle rod base rod with the length of 108mm, and the effective porosity inside; 3) combining the filter paper with 12000CU forming paper and an acetate fiber rod with the length of 84mm according to the proportion of 18:7, connecting and heating the non-combustible cigarette by adopting self-permeable loose paper, enabling a temperature reduction section to be close to the end of the tobacco shred, and synchronously connecting and heating the non-combustible cigarette with the same specification by adopting the acetate fiber filter rod as a contrast. The smoke temperature at the time of suction was measured separately, and the results are shown in Table 1.
Example 2
1) The preparation method of the cooling particles comprises the following steps: respectively taking 70 parts of 100-mesh ethylene/vinyl acetate copolymer, 10 parts of polyoxyethylene and 10 parts of polyvinyl alcohol according to the mass parts, uniformly mixing, blending, melting, extruding, granulating and rounding by using a commercial screw extruder, and taking 15-25-mesh particles to obtain low-adsorption cooling particles, wherein the bulk density of the particles is 2.5 g/ml; 2) the preparation method of the cooling particle stick comprises the following steps: the prepared low-adsorption cooling particles are continuously and sequentially sent into three die cavity assemblies distributed in series through a conveying belt, the center of each die cavity is a circular channel with the circumference of 23.5mm, negative pressure is arranged in a first die cavity to enable the particles to be compressed and stacked in the first die cavity, the first die cavity is sent to a second die cavity with a heating device after being wrapped by a cloth belt, the particles in the die cavity are heated to 115 ℃, the particle parts are softened and primarily bonded, the particles are further sent to a third die cavity to be cooled to below 40 ℃, the particles are re-hardened and cured to form an integral particle rod, the integral particle rod is further cut into a cooling particle rod base rod with the length of 108mm, and the effective porosity in the particle rod is; 3) combining the filter paper with 12000CU forming paper and an acetate fiber rod with the length of 84mm according to the proportion of 18:7, connecting and heating the non-combustible cigarette by adopting pre-perforated tipping paper, enabling a temperature reduction section to be close to the end of the tobacco shred, and synchronously connecting and heating the non-combustible cigarette with the same specification by adopting the acetate fiber filter rod as a contrast. The smoke temperature at the time of suction was measured separately, and the results are shown in Table 1.
Example 3
1) The preparation method of the cooling particles comprises the following steps: respectively taking 65 parts of 150-mesh polylactic acid, 10 parts of polyethylene glycol, 10 parts of polyvinyl alcohol, 10 parts of polyethylene and 5 parts of paraffin according to parts by mass, uniformly mixing, blending, melting, extruding, granulating and rounding by using a commercial screw extruder, and taking 30-60-mesh particles to obtain low-adsorption cooling particles, wherein the bulk density of the particles is 2.0 g/ml; 2) the preparation method of the cooling particle stick comprises the following steps: the prepared low-adsorption cooling particles are continuously and sequentially sent into three die cavity assemblies distributed in series through a conveying belt, the center of each die cavity is a circular channel with the circumference of 23.5mm, negative pressure is arranged in a first die cavity to enable the particles to be compressed and stacked in the first die cavity, the first die cavity is wrapped by a cloth belt and then sent to a second die cavity with a heating device, the particles in the die cavity are heated to 105 ℃, the particle parts are softened and primarily bonded, the particles are further sent to a third die cavity to be cooled to below 40 ℃, the particles are re-hardened and cured to form an integral particle rod, the integral particle rod is further cut into a cooling particle rod base rod with the length of 108mm, and the effective porosity in the particle rod is; 3) combining 8000CU forming paper with an acetate fiber rod with the length of 84mm according to the proportion of 18:7, connecting and heating the non-combustible cigarette by adopting pre-perforated tipping paper, enabling a temperature reduction section to be close to the tobacco shred end, and synchronously connecting and heating the non-combustible cigarette with the same specification by adopting the acetate fiber filter rod as a comparison. The smoke temperature at the time of suction was measured separately, and the results are shown in Table 1.
Example 4
1) The preparation method of the cooling particles comprises the following steps: respectively taking 40 parts of 80-mesh ethylene/vinyl acetate copolymer, 10 parts of beeswax, 20 parts of modified starch, 20 parts of microcrystalline cellulose and 10 parts of stearic acid, uniformly mixing, spraying 30 parts of 50% alcohol by volume concentration, uniformly stirring, extruding into strips, cutting into granules, rounding, drying until the water content is lower than 5%, sieving to obtain 20-40-mesh granules, and obtaining low-adsorption cooling granules, wherein the stacking density of the granules is 1.8 g/ml; 2) the preparation method of the cooling particle stick comprises the following steps: the method comprises the following steps of continuously and sequentially feeding prepared low-adsorption cooling particles into four die cavity assemblies distributed in series through a conveying belt, wherein the center of each die cavity is a circular channel with the circumference of 23.5mm, negative pressure is arranged in a first die cavity to enable the particles to be compressed and stacked in the first die cavity, a cloth belt wraps the particles and then sends the wrapped particles to a second die cavity with a heating device, the particles in the die cavity are heated to 105 ℃, the particles are partially softened and primarily bonded, the particles are further sent to a third die cavity to be cooled to be below 40 ℃, the particles are re-hardened and cured to form an integral particle rod, the particles are further sent to a fourth die cavity to wrap high-permeability molding paper (12000 CU), the high-permeability molding paper is cut into cooling particle rod base rods with the length of 108; 3) the paper is compounded with a paper rod of an empty tube with the length of 84mm according to the proportion of 18:7 by adopting 12000CU forming paper, the cigarette is heated and does not burn by adopting pre-perforated tipping paper, the temperature reduction section is close to the end of the tobacco shred, and the cigarette which is heated and does not burn with the same specification is synchronously jointed by adopting an acetate fiber filter rod as a contrast. The smoke temperature at the time of suction was measured separately, and the results are shown in Table 1.
Example 5
1) The preparation method of the cooling particles comprises the following steps: respectively taking 45 parts of 80-mesh ethylene/vinyl acetate copolymer, 15 parts of modified starch, 10 parts of polylactic acid, 25 parts of microcrystalline cellulose, 3 parts of copper powder and 2 parts of iron powder, uniformly mixing, spraying 40 parts of purified water, uniformly stirring, extruding into strips, cutting into granules, rounding, drying until the water content is lower than 5%, sieving to obtain 30-50-mesh granules, and obtaining low-adsorption cooling granules, wherein the stacking density of the granules is 1.5 g/ml; 2) the preparation method of the cooling particle stick comprises the following steps: the prepared low-adsorption cooling particles are continuously and sequentially sent into three die cavity assemblies in serial distribution through a conveying belt, the center of each die cavity is a circular channel with the circumference of 23.5mm, negative pressure is arranged in a first die cavity to enable the particles to be compressed and stacked in the first die cavity, the first die cavity is wrapped by a cloth belt and then sent to a second die cavity with a heating device, the particles in the die cavity are heated to 105 ℃, the particle parts are softened and primarily bonded, the particles are further sent to a third die cavity to be cooled to below 40 ℃, the particles are re-hardened and cured to form an integral particle rod, the integral particle rod is further cut into a cooling particle rod base rod with the length of 108mm, and the effective porosity in the particle rod is; 3) the paper is compounded with a paper rod of an empty tube with the length of 84mm according to the proportion of 18:7 by adopting 12000CU forming paper, the cigarette is heated and does not burn by adopting pre-perforated tipping paper, the temperature reduction section is close to the end of the tobacco shred, and the cigarette which is heated and does not burn with the same specification is synchronously jointed by adopting an acetate fiber filter rod as a contrast. The smoke temperature at the time of suction was measured separately, and the results are shown in Table 1.
TABLE 1 temperature measurement results
The detection shows that the cooling filter stick provided by the invention has a very obvious cooling effect, and the inlet smoke temperature is far lower than that of an acetate fiber filter stick group and patent CN109363237A (the main stream smoke temperature is more than 39 ℃, and is more than 40 ℃ in most cases).
The cooling filter stick is prepared according to the method of CN2018104868613 and the scheme of the invention, the cigarette with the same specification and heated without burning is rolled for smoking, the cigarette smoke amount of the filter stick is more significant than that of the cigarette with the filter stick of CN2018104868613, and the adsorbability of the filter stick of the invention is far lower than that of the technical scheme provided by the applicant in CN 2018104868613.
The foregoing examples are set forth to illustrate the present invention more clearly and are not to be construed as limiting the scope of the invention, which is defined in the appended claims to which the invention pertains, as modified in all equivalent forms, by those skilled in the art after reading the present invention.
Claims (10)
1. A cooling filter stick comprises a stick body and is characterized in that the stick body is formed by bonding, solidifying and molding particles, pores are formed among the particles of the stick body, and the effective porosity of the stick body is 30-90%; the mass ratio of the polymer, the wax and the particle modified material in the particles is (20-100): (0-30) (0-50), wherein the polymer comprises at least one of polyethylene, ethylene/vinyl acetate copolymer, polyvinyl alcohol, polyethylene glycol, polyurethane, polyamide, polyesteramide, polylactic acid and polyethylene oxide, and the particle modification material comprises at least one of modified starch, stearic acid, palmitic acid, magnesium stearate, starch, microcrystalline cellulose, copper powder, iron powder, stainless steel powder and aluminum powder.
2. The cooling filter stick according to claim 1, wherein the mass ratio of the polymer to the wax to the particle modifying material in the particles is (25-95): (5-25)(5-50).
3. The cooling filter rod according to claim 1, wherein the particles contain at least one polymer and/or wax having a melting point or softening point below 85 ℃, and the specific gravity of the polymer and/or wax in the particles is 30-90 wt%.
4. The cooling filter stick according to claim 1, wherein the particles have a particle size of 15-60 mesh and a bulk density of 0.8-3.5g/ml, preferably 1.0-3.0 g/ml.
5. A cooling filter rod according to any one of claims 1 to 4, wherein the wax is at least one of paraffin wax, beeswax and carnauba wax.
6. A cooling filter rod according to any one of claims 1 to 4 wherein the surface of the rod body is wrapped with a plug wrap, typically having an air permeability of not less than 6000CU, preferably more than 8000 CU.
7. A method of making a cooling filter rod according to any one of claims 1 to 6 comprising the steps of:
s1, preparation of particles: uniformly mixing the polymer, the wax and the particle modified material according to the proportion, granulating, drying and sieving to obtain particles with required particle size;
s2, molding: inputting the particles into a first die cavity for compression and stacking to obtain a blank body; inputting the blank into a second die cavity for heating treatment so as to bond particles in the blank; then, inputting the blank into a third die cavity, cooling and solidifying to obtain a rod body;
wherein the cross section of each die cavity is matched with the cross section of the rod body.
8. The method for preparing the cooling filter stick according to claim 7, wherein the granules are wrapped by a conveyer belt and sequentially pass through the first die cavity, the second die cavity and the third die cavity.
9. The method for preparing a cooling filter stick according to claim 7, wherein in S2, the particle temperature is 100-150 ℃ during the heating treatment.
10. Use of a cooling filter rod according to any one of claims 1 to 6 or a cooling filter rod prepared by the preparation method according to any one of claims 7 to 9 in a smoking article.
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| CN114468354A (en) * | 2021-12-14 | 2022-05-13 | 江苏大亚滤嘴材料有限公司 | Preparation method of dust-free paper with cooling function and application of dust-free paper to composite filter stick |
| CN114504125A (en) * | 2022-03-17 | 2022-05-17 | 湖北中烟工业有限责任公司 | Low-suction-resistance sweet cooling material for cigarette filter tip |
| CN114521674A (en) * | 2022-02-24 | 2022-05-24 | 湖北中烟工业有限责任公司 | Low-suction-resistance material for cigarette filter tip |
| CN114617293A (en) * | 2022-03-17 | 2022-06-14 | 湖北中烟工业有限责任公司 | Low-suction-resistance cool-feeling cooling material for cigarette filter tip |
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