CN110810917A - Safe and environment-friendly cooling filter tip rod and preparation method thereof - Google Patents
Safe and environment-friendly cooling filter tip rod and preparation method thereof Download PDFInfo
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- CN110810917A CN110810917A CN201911287505.XA CN201911287505A CN110810917A CN 110810917 A CN110810917 A CN 110810917A CN 201911287505 A CN201911287505 A CN 201911287505A CN 110810917 A CN110810917 A CN 110810917A
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- 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
- A24D3/02—Manufacture of tobacco smoke filters
- A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
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- 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
- A24D3/02—Manufacture of tobacco smoke filters
- A24D3/0229—Filter rod forming processes
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- 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
- A24D3/02—Manufacture of tobacco smoke filters
- A24D3/025—Final operations, i.e. after the filter rod forming process
- A24D3/0254—Cutting means
-
- 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
-
- 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
- A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
Abstract
The invention relates to a safe and environment-friendly cooling filter tip rod and a preparation method thereof. The hollow cooling filter stick is heated and bonded by steam in the forming process, and a plasticizer is not added, so that the hollow cooling filter stick is a safe and environment-friendly new cooling filter material for low-temperature cigarettes.
Description
Technical Field
The invention belongs to the technical field of cigarettes, and particularly relates to a safe and environment-friendly cooling filter tip rod and a preparation method thereof.
Background
In recent years, smoking, health, second-hand smoking and other problems are being paid attention to all over the world, and the disadvantages caused by the traditional tobacco products are highlighted. The tobacco product structure is being regulated rapidly towards diversification and smokelessness. In view of this, the research and development of new tobacco products that can meet the current consumer needs and reduce the harm caused by smoking and second-hand smoke has become an important task for the future development of the tobacco industry.
The traditional tobacco products are combustion-absorption type tobacco products, and various chemical substances are released by chemical reaction generated by combustion of tobacco and are supplied to smokers for smoking. Compared with the traditional tobacco products, the novel tobacco products greatly reduce the harm of smoking to consumers and surrounding people. A heating non-combustion tobacco product (also called low-temperature cigarette) is a novel tobacco product which heats tobacco shreds by a special heating source, and nicotine and flavor substances in the tobacco shreds are volatilized to generate smoke to meet the requirements of smokers during heating. Different from the traditional cigarette, the tobacco shred of the non-combustion tobacco product is heated in the smoking interval to be in a non-combustion state, thereby reducing the harmful components generated by the high-temperature combustion and cracking of the tobacco as much as possible.
The low-temperature cigarette has the defects that the length of the low-temperature cigarette is only about one third of that of the conventional cigarette, the temperature in a smoke inlet is higher, and the comfort is poor.
CN201811183034.3 relates to a polylactic acid cooling filter tip for cigarette, sets up polylactic acid sheet as the heliciform extension, and the multi-disc superposes the rotation, increases the area of contact of polylactic acid sheet and flue gas. CN201821428537.8 relates to a polylactic acid paper tube filter rod and have novel cigarette of polylactic acid paper tube filter rod, its characterized in that compound filter rod is including the first acetate fiber filter rod section, the hollow filter rod section of polylactic acid and the second acetate fiber filter rod section of compounding in proper order, the hollow filter rod section of polylactic acid includes polylactic acid layer and first paper tube plug wrap, and the hollow tubular structure that has the cavity is made to the polylactic acid layer book, and first paper tube plug wrap is attached in the polylactic acid layer outside. The polylactic acid layer is a polylactic acid film or a polylactic acid non-woven fabric. CN201610732176.5 relates to a filter stick for short cigarettes, which uses polylactic acid film material as filter material, and bundles (pinching and bundling) the film material to form a filter stick with a porous cross section. The aims of reducing nicotine interception and reducing smoke temperature are achieved by reducing the suction resistance of the quick-smoking short cigarette filter stick. CN201810637872.7 relates to an improved cooling filter rod and low temperature cigarette that contains this filter rod, wrapping material layer and cooling material piece, cooling material piece is formed by the combination of supporting material layer and polymer material layer, cooling material piece be constructed into the beam column that has vertical gas circuit pore way range, the supporting material layer cover in polymer material layer surface, the wrapping material layer wrap up in cooling material piece constitution beam column surface, form the cooling filter rod. The polymer material layer is an amorphous polymer material, the glass transition temperature of the polymer material layer is 40-100 ℃, and the polymer material layer comprises materials such as polylactic acid, polyethylene, polypropylene, copolyester and the like. CN201721683861.X relates to an electric heating low-temperature cigarette smoke cooling filter rod which is formed by sequentially compounding a first hollow rod, a polylactic acid film rod and a second hollow rod, wherein the film rod longitudinally penetrates through an opening to form a film rod air hole. Punching and adopting high-transparency forming paper improve the cooling effect.
In addition, a part of patents relate to a mode of combining a phase change energy storage material and polylactic acid to achieve the purpose of temperature reduction and filtration. CN201810352351.7 relates to a preparation method of a low-smoke-resistance polylactic acid tow filter stick for reducing smoke temperature, which combines the low-smoke-resistance PLA tow filter stick by increasing the adding amount of a phase-change material, improves the overall smoking taste of cigarettes and heated non-burning cigarettes by multiple cooling, and reduces smoke temperature. CN201710973892.7 relates to a heat storage capsule for reducing the temperature of cigarette mainstream smoke and preparation and application thereof, and provides a heat storage capsule for reducing the temperature of cigarette mainstream smoke, which comprises a wall material and a core material; the core material is an inorganic hydrated salt phase-change material; the wall material is polylactic acid.
Still another patent relates to a way of compounding polylactic acid tows in a groove structure to achieve the purpose of cooling. CN201811558872.4 relates to a PLA cooling filter stick and a preparation method thereof, the PLA cooling filter stick is composed of a groove cooling section and a filter section, the groove cooling section is a straight-through groove, the filter stick is a low-pressure-drop filter stick with the pressure of less than 150Pa/cm, and compared with a conventional filter stick, the PLA cooling filter stick can reduce the smoke temperature by 10-20 ℃. CN201811591007.X relates to a heating non-combustion cigarette with a hollow and groove structure, wherein a hollow cooling section is prepared by wrapping molding paper by a hollow special-shaped groove rod, and the hollow special-shaped groove rod can be prepared from one of cellulose diacetate tows, polypropylene tows, polylactic acid tows, polymethylpentene, polyether sulfone and the like. CN201810016128.5 relates to a low temperature cigarette with a cooling section, wherein the cooling section is a hollow inner cavity formed by a cooling material and is provided with a staggered bending structure to enable smoke gas flow to flow in the cooling section in a back-and-forth turning manner, the cooling section is formed by injection molding of a polylactic acid and polyethylene blend, and the polylactic acid accounts for 30-99% of the weight of the prepared blend.
According to trial production analysis in a cigarette factory, the difficulty in preparing a filter stick structure by using the polylactic acid sheet film and butting the filter stick structure with a traditional filter stick is high, special equipment needs to be designed for processing and production, the production process is not easy to be continuous, and the production efficiency is low; and the polylactic acid sheet film absorbs heat, softens and collapses to easily block the smoke channel. The process for adding the phase-change material is complex, the cost is high, and the industrial popularization is not easy. Polylactic acid groove structure has certain cooling effect, but present technology all chooses single component silk bundle for use, and the design relies on traditional rubberizing technology. The prior product application technology does not have a proper binder of polylactic acid material, and the water-based adhesive for polypropylene tows is mainly selected, so that the process is complex (moisture needs to be dried), and the water-based adhesive has certain harmfulness. No obvious cooling effect is achieved after the groove structure filter stick of the cellulose diacetate tows and the polypropylene tows is tested, and the cellulose diacetate tows are required to be added with a glycerol triacetate plasticizer during forming, so that the cellulose diacetate tows and the polypropylene tows are harmful to a certain extent.
Therefore, the problem that the filter stick with the cooling section is safe, has no additive, obvious cooling effect and continuous production, and can utilize the existing cigarette production equipment is urgently needed to be solved.
Disclosure of Invention
In view of the defects of the cooling filter stick in the prior art, the safe and environment-friendly cooling filter stick prepared by the invention has the cooling and filtering effects without adding a plasticizer and a binder, can be produced by using the existing hollow filter stick production line, and has the advantages of simple process and low cost.
The prepared cooling filter rod is of a hollow structure, monofilament fibers of cigarette tows of the filter rod comprise a component A and a component B, the component A is polylactic acid, the component B is a polymer with a melting point higher than that of the component A, and a plurality of monofilaments are connected in a thermal bonding mode. The melting point of the polylactic acid of the component A is 125-180 ℃; the component B is polylactic acid (melting point 165-230 ℃), polybutylene terephthalate (PBT) (melting point 220-240 ℃), or polyethylene terephthalate (PET) (melting point 220-260 ℃).
The melting point difference of the two components of the cigarette tows selected by the invention is required to be more than 30 ℃, preferably 40-50 ℃, so that one component can keep the original physical properties in the heating and bonding process, and the physical indexes of the filter rod are not influenced.
Preferably, the content of the relatively low-melting-point component in the monofilament of the cigarette tow is less than or equal to 50 wt%, and more preferably, the content is 40-45 wt%, so that the specific gravity of the component which keeps the physical property unchanged in the heating and bonding process of one component is relatively large, and the physical index of the filter rod is not influenced.
The ratio of the inner diameter D1 of the hollow part to the outer diameter D2 of the filter stick is D1: d2 is between 0.3 and 0.8, preferably D1: d2 is between 0.4 and 0.7.
According to the safe and environment-friendly cooling filter tip rod, the cross section of the tow fiber is of the sheath-core structure, the sheath of the sheath-core structure is the component A, the core of the sheath-core structure is the component B, the sheath-core structure can be concentric or eccentric, and the eccentric sheath-core structure enables the tow to form a curled and fluffy effect, so that the suction resistance can be reduced; the cross section of the tow fiber is circular or triangular.
The titer of each filament of the cigarette tows selected by the invention is 3-20 deniers, and the preferred titer of each filament is 5-15 deniers; the total denier of the filament bundle is 0.5-4 ten thousand denier, preferably 0.5-2 ten thousand denier. The higher monofilament titer can ensure lower suction resistance, and the flue gas can fully contact with the polylactic acid fiber for heat exchange, thereby achieving the effect of filtering harmful substances while cooling.
The invention also relates to a preparation method of the cooling filter tip rod, which comprises the following steps:
1) extraction: the extraction height of the cigarette tows is 2.0-2.3 m;
2) opening: opening the cigarette tows, wherein the pressure of a pressure stabilizing roller is 0.05-0.08MPa, and the pressure of a thread roller is 0.10-0.18 MPa;
3) steam heating and bonding: the tows pass through a steam section cigarette gun of a hollow filter stick forming machine, the model of the hollow filter stick forming machine is KDF-2, and the steam temperature is 110-; the flow rate of the steam is 10-35 m/s.
4) Air cooling and forming: and fusing and bonding the filament bundle skin layer of the steam section, then entering a cooling section smoke gun, and rapidly cooling and molding the fused and bonded filament bundle at the temperature of-15-10 ℃ and the flow speed of 10-20 m/s by using freeze-dried air.
5) Cutting and collecting: cutting into fixed length according to the process requirement, and collecting the paper boxes for standby.
The cooling filter tip rod and the production process thereof have the following beneficial effects:
1. the curing and forming of the cigarette tows do not need a glycerol triacetate plasticizer, a physical thermal bonding process is changed, and the safety performance of the cooling filter tip rod is improved.
2. The hollow cooling filter rod produced by the invention has obvious cooling effect and can be used as a cooling section of a low-temperature cigarette filter rod.
3. The hollow structure and the high-denier cigarette tows reduce the smoke resistance and meet the requirement of low smoke resistance of low-temperature cigarettes.
4. The method can be used for producing the hollow filter stick on the original hollow filter stick forming equipment, and has the advantages of simple process, continuous production, high efficiency and low cost.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic cross-sectional view of a hollow cooling filter stick of the present invention;
FIG. 2 is a schematic cross-sectional view of a cigarette tow monofilament of example 1 of the present invention;
FIG. 3 is a schematic cross-sectional view of a cigarette tow monofilament of example 2 of the present invention;
figure 4 is a schematic cross-sectional view of a cigarette tow monofilament of example 3 of the present invention.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example 1:
1. the raw material of the cigarette tows: the core layer component B is polylactic acid with high melting point, the melting point of the polylactic acid is 225 ℃, the skin layer component A is conventional melting point PLA (the melting point is 175 ℃), and the weight of the component A accounts for 45 wt%. The main specifications of the cigarette tows are as follows: the total denier is 3.5 ten thousand denier, the filament denier is 20 denier, and the cross section of the filament is a triangular structure as shown in figure 2.
2. The filter stick forming process comprises the following steps:
1) extraction: the height of the tobacco tows extracted is 2.0 m; 2) opening: opening the cigarette tows, wherein the pressure of a pressure stabilizing roller is 0.06MPa, and the pressure of a thread roller is 0.10 MPa; 3) steam heating and bonding: the tows pass through a steam section cigarette pipe of a hollow filter stick forming machine, the model of the hollow filter stick forming machine is KDF-2, and the steam temperature is 190 ℃; the steam flow rate is 18 m/s; 4) air cooling and forming: fusing and bonding the filament bundle skin layer of the steam section, then entering a cooling section smoke gun, and rapidly cooling and molding the fused and bonded filament bundle at the temperature of minus 10 ℃ and the flow rate of 20 m/s; 5) cutting and collecting: cutting into fixed length according to the process requirement, and collecting the paper boxes for standby.
3. The physical properties of the prepared hollow cooling filter stick are as follows:
the schematic cross-sectional structure is shown in fig. 1, the ratio of the inner diameter D1 of the hollow part to the outer diameter D2 of the filter stick is D1: d2 is 0.3, the circumference of the filter stick is 22.30mm, the temperature reduction range is 19.2 ℃, the draw resistance is 1653Pa, and the roundness is 0.21mm according to the GB/T22838.13-2009 cigarette and filter stick physical property measuring method.
Example 2:
1. the raw material of the cigarette tows: the core layer B component is PET with a melting point of 245 ℃, the skin layer A component is conventional melting point PLA, the melting point is 160 ℃, and the weight of the A component accounts for 40 wt%. The main specifications of the cigarette tows are as follows: the total denier is 1.0 ten thousand denier, the filament denier is 15 denier, and the cross section of the filament is a concentric circle sheath-core structure as shown in figure 3.
2. The filter stick forming process comprises the following steps:
1) extraction: the height of the tobacco filament bundle is 2.3 m; 2) opening: opening the cigarette tows, wherein the pressure of a pressure stabilizing roller is 0.08MPa, and the pressure of a thread roller is 0.12 MPa; 3) steam heating and bonding: the tows pass through a steam section cigarette pipe of a hollow filter stick forming machine, the model of the hollow filter stick forming machine is KDF-2, and the steam temperature is 180 ℃; the steam flow rate is 30 m/s; 4) air cooling and forming: fusing and bonding the filament bundle skin layer of the steam section, then entering a cooling section smoke gun, and rapidly cooling and molding the fused and bonded filament bundle at the temperature of 0 ℃ and the flow rate of 10m/s by using freeze-dried air; 5) cutting and collecting: cutting into fixed length according to the process requirement, and collecting the paper boxes for standby.
3. Hollow cooling filter rods:
the cross-sectional structure of the material is schematically shown in fig. 1, wherein D1 is D2 is 0.6, the circumference is 22.18mm, the temperature reduction amplitude is 16.5 ℃, the suction resistance is 1576Pa, and the roundness is 0.23 mm.
Example 3:
1. the raw material of the cigarette tows: the core layer B component is PBT with a melting point of 235 ℃, the skin layer A component is PLA with a melting point of 170 ℃, and the weight of the A component accounts for 40 wt%. The main specifications of the cigarette tows are as follows: the total denier is 0.8 ten thousand denier, the single filament denier is 5 denier, and the cross section of the single filament is of a sheath-core structure with eccentric circles as shown in figure 4.
2. The filter stick forming process comprises the following steps:
1) extraction: the height of the tobacco filament bundle is 2.3 m; 2) opening: opening the cigarette tows, wherein the pressure of a pressure stabilizing roller is 0.08MPa, and the pressure of a thread roller is 0.18 MPa; 3) steam heating and bonding: the tows pass through a steam section cigarette pipe of a hollow filter stick forming machine, the model of the hollow filter stick forming machine is KDF-2, and the steam temperature is 120 ℃; the steam flow rate is 10 m/s; 4) air cooling and forming: fusing and bonding the filament bundle skin layer of the steam section, then entering a cooling section smoke gun, and rapidly cooling and molding the fused and bonded filament bundle at the temperature of 8 ℃ and the flow rate of 18 m/s; 5) cutting and collecting: cutting into fixed length according to the process requirement, and collecting the paper boxes for standby.
3. Hollow cooling filter rods:
the cross-sectional structure of the material is schematically shown in fig. 1, wherein D1 is D2 is 0.7, the circumference is 22.10mm, the temperature reduction amplitude is 12.8 ℃, the suction resistance is 1594Pa, and the roundness is 0.20 mm.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a safe environmental protection's cooling filter tip stick which characterized in that: the interior of the cooling filter tip rod is provided with an axial hollow structure; the monofilament of the cigarette tow of the cooling filter tip rod comprises a component A and a component B, wherein the component A is polylactic acid, the component B is a polymer with a melting point higher than that of the component A, and a plurality of monofilaments are connected in a thermal bonding mode.
2. The safe and environment-friendly cooling filter rod as claimed in claim 1, wherein the ratio of the inner diameter of the hollow part of the cooling filter rod to the outer diameter of the cooling filter rod is 0.3-0.8.
3. The safe and environment-friendly cooling filter rod as claimed in claim 2, wherein the melting point of the polylactic acid of the component A is 125-180 ℃; the component B is polylactic acid, polybutylene terephthalate PBT or polyethylene terephthalate PET, and the melting point of the component B is higher than that of the component A by more than 30 ℃.
4. The safe and environment-friendly cooling filter rod as claimed in claim 3, wherein the component B is polylactic acid with a melting point of 165-230 ℃.
5. The safe and environment-friendly cooling filter rod as claimed in claim 3, wherein the component B is polybutylene terephthalate PBT with a melting point of 220-240 ℃.
6. The safe and environment-friendly cooling filter rod as claimed in claim 3, wherein the component B is polyethylene terephthalate PET with a melting point of 220-260 ℃.
7. The safe and environment-friendly cooling filter rod as claimed in claim 3, wherein the cross section of the monofilament is of a skin-core structure, the skin of the skin-core structure is the component A, and the core of the skin-core structure is the component B; the skin layer and the core layer of the skin-core structure are concentrically arranged.
8. The safe and environment-friendly cooling filter rod as claimed in claim 3, wherein the cross section of the monofilament is of a skin-core structure, the skin of the skin-core structure is the component A, and the core of the skin-core structure is the component B; the skin layer and the core layer of the skin-core structure are eccentrically arranged.
9. The safe and environment-friendly cooling filter rod as claimed in claim 2, wherein the cross section of the monofilament is circular or triangular; the titer of each monofilament is 3-20 deniers, and the total denier of each tow is 0.5-4 ten thousand deniers.
10. A method for preparing a safe and environment-friendly cooling filter tip rod as claimed in claim 1, which is characterized by comprising the following steps:
1) extraction: the extraction height of the cigarette tows is 2.0-2.3 m;
2) opening: opening the cigarette tows, wherein the pressure of a pressure stabilizing roller is 0.05-0.08MPa, and the pressure of a thread roller is 0.10-0.18 MPa;
3) steam heating and bonding: the tows pass through a steam section smoke pipe of a hollow forming unit, and the steam temperature is 110-; the flow rate of the steam is 10-35 m/s.
4) Air cooling and forming: and fusing and bonding the filament bundle skin layer of the steam section, then entering a cooling section smoke gun, and rapidly cooling and molding the fused and bonded filament bundle at the temperature of-15-10 ℃ and the flow speed of 10-20 m/s by using freeze-dried air.
5) Cutting and collecting: cutting into fixed length according to the process requirement, and collecting the paper boxes for standby.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911287505.XA CN110810917A (en) | 2019-12-14 | 2019-12-14 | Safe and environment-friendly cooling filter tip rod and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911287505.XA CN110810917A (en) | 2019-12-14 | 2019-12-14 | Safe and environment-friendly cooling filter tip rod and preparation method thereof |
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| CN110810917A true CN110810917A (en) | 2020-02-21 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111184270A (en) * | 2020-03-20 | 2020-05-22 | 四川三联新材料有限公司 | Heating cigarette cooling firmware and application thereof, and heating cigarette |
| CN111436650A (en) * | 2020-04-20 | 2020-07-24 | 河南中烟工业有限责任公司 | Preparation method of hollow cooling filter stick |
| CN113773623A (en) * | 2020-12-11 | 2021-12-10 | 湖北中烟工业有限责任公司 | Full-degradable cooling firmware and preparation method and application thereof |
| CN114631644A (en) * | 2022-04-26 | 2022-06-17 | 南通烟滤嘴有限责任公司 | Double-layer filter stick, composite filter stick, cigarette and cigarette preparation method |
-
2019
- 2019-12-14 CN CN201911287505.XA patent/CN110810917A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111184270A (en) * | 2020-03-20 | 2020-05-22 | 四川三联新材料有限公司 | Heating cigarette cooling firmware and application thereof, and heating cigarette |
| CN111436650A (en) * | 2020-04-20 | 2020-07-24 | 河南中烟工业有限责任公司 | Preparation method of hollow cooling filter stick |
| CN113773623A (en) * | 2020-12-11 | 2021-12-10 | 湖北中烟工业有限责任公司 | Full-degradable cooling firmware and preparation method and application thereof |
| CN114631644A (en) * | 2022-04-26 | 2022-06-17 | 南通烟滤嘴有限责任公司 | Double-layer filter stick, composite filter stick, cigarette and cigarette preparation method |
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