CN108391849B - Rapid heat absorption filter based on hollow fibers and application thereof - Google Patents
Rapid heat absorption filter based on hollow fibers and application thereof Download PDFInfo
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- CN108391849B CN108391849B CN201810451924.1A CN201810451924A CN108391849B CN 108391849 B CN108391849 B CN 108391849B CN 201810451924 A CN201810451924 A CN 201810451924A CN 108391849 B CN108391849 B CN 108391849B
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- hollow fiber
- filter
- adhesive
- hollow fibers
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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
- A24D3/06—Use of materials for tobacco smoke filters
- A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
- A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives
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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
- A24D3/06—Use of materials for tobacco smoke filters
- A24D3/14—Use of materials for tobacco smoke filters of organic materials as additive
Abstract
The invention relates to a technique for manufacturing a tobacco filter stickThe technical field aims at providing a rapid heat absorption filter based on hollow fibers and application thereof. The filter comprises a wrapping material, hollow fibers and an adhesive material; a plurality of hollow fibers which are arranged in parallel and are coalesced into bundles are wrapped in the wrapping material to form uniform cylindrical bars, and the gaps among the hollow fibers are filled with adhesive materials for sealing and fixing the hollow fibers; an axial pore passage in the hollow fiber forms a gas flow passage; the adhesive material has a glass transition temperature of less than 80 deg.C, a melting point of less than 200 deg.C, and a specific heat capacity of more than 1.5 kJ.kg‑1·K‑1The adhesive of (1). The filter is applied to tobacco products. The product has a wide temperature range of absorbing heat but not deforming near the temperature of comfortable mouthfeel of human bodies, and can absorb a large amount of heat attached to high-temperature smoke; and the contact exchange specific surface with the flue gas is greatly improved, the heat exchange rate is improved, and the instantaneous temperature of the high-temperature flue gas is quickly reduced.
Description
Technical Field
The invention belongs to the technical field of tobacco filter stick manufacturing, and particularly relates to a hollow fiber-based rapid heat absorption filter and application thereof.
Background
In recent years, new tobacco products such as electronic cigarettes and non-combustible tobacco products by heating have been rapidly developed. The electronic cigarette does not directly use tobacco in a cut tobacco form, and mainly atomizes nicotine liquid derived from tobacco to form a gas. The non-combustion tobacco product is heated by an external heat source instead of igniting tobacco to generate gas with tobacco flavor, and the tobacco product is heated by carbon, electric heating and the like. Novel tobacco is honored as a more healthy substitute of traditional tobacco product, and the harmful substance in the flue gas is less relatively. But because novel tobacco adopts airtight heating's mode, and the cigarette props up for a short time, leads to the entry cigarette temperature to scald excessively, still has great difference with traditional cigarette in the aspect of smoking experience and smoking impression etc.. Therefore, the selection of a proper cooling material has important significance for reducing the temperature of the smoke and improving the taste of the smoke.
Patent 201210336384 discloses a filter tip capable of reducing smoke temperature and its preparation method, wherein a microporous aluminum layer is attached to the front surface of the wrapping material through an adhesive layer, and the condensation of the microporous aluminum is used to reduce smoke temperature.
Patent 201710785910.9 discloses a base rod for increasing and cooling flavor, wherein polylactic acid fiber particles or acetate fiber particles with a diameter of 0.45-0.6 mm are doped in a filter stick according to a certain proportion. Patent 201710785572.9 discloses a base rod for cooling and flavoring film gathering, which is a folded polylactic acid fiber film or acetate fiber film wrapped in a filter stick and having a plurality of smoke channels with irregular sizes and shapes. Whether the material is a granular material or a film material, the common problems are that the bulk density is small, the contact area of the material and the smoke is limited, and the effect of quickly cooling the smoke is difficult to realize.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art, and provides a hollow fiber-based rapid heat absorption filter, in particular a filter capable of realizing instantaneous cooling of high-temperature flue gas. The rapid heat absorption filter based on the hollow fibers has the advantages that the temperature of outlet flue gas is lower than 45 ℃, and the temperature reduction amplitude is larger than 30%.
In order to solve the technical problem, the solution of the invention is as follows:
provided is a hollow fiber-based rapid heat absorption filter including a wrapping material; also comprises hollow fibers and adhesive materials; a plurality of hollow fibers which are arranged in parallel and are coalesced into bundles are wrapped in the wrapping material to form uniform cylindrical bars, and the gaps among the hollow fibers are filled with adhesive materials for sealing and fixing the hollow fibers; an axial pore passage in the hollow fiber forms a gas flow passage; the adhesive material has a glass transition temperature of less than 80 deg.C, a melting point of less than 200 deg.C, and a specific heat capacity of more than 1.5 kJ.kg-1·K-1The adhesive of (1).
As an improvement, the hollow fiber is a hollow fiber tube, a hollow fiber ultrafiltration membrane or a hollow fiber microfiltration membrane, the diameter is 0.2-1.3 mm, and the wall thickness is 0.04-0.30 mm.
As an improvement, the hollow fiber material is one or a mixture of any two of polysulfone, polyethersulfone, polyethersulfoneketone, sulfonated polysulfone, polyvinylidene fluoride, polytetrafluoroethylene, polyperfluorocarbonic acid, polyperfluorosulfonic acid, cellulose acetate, cellulose nitrate, carboxymethyl cellulose, ethyl cellulose, regenerated cellulose, polyamide, polyimide, polyphenylsulfone terephthalamide, aromatic polyamide hydrazide, polypropylene, polyethylene, polyacrylonitrile, polyvinyl chloride, polyacrylic acid, polyvinyl alcohol, polyacrylamide, polystyrene, ethylene-vinyl alcohol copolymer, polyurethane, polyethylene terephthalate, polybutylene terephthalate, polymethyl methacrylate, polybenzimidazole, polypyrazine amide, chitosan, chitin, polylactic acid, polyelectrolyte, polyether block copolymer, polyvinylpyrrolidone, polyisophthaloyl metaphenylene diamine and organic silicon, preferably one or a mixture of any two of polyvinylidene fluoride, sulfonated polysulfone, polyethersulfone, cellulose acetate, polyacrylonitrile, polyvinyl chloride, polytetrafluoroethylene, polypropylene, polyethylene and polylactic acid.
As an improvement, the filling rate of the hollow fibers in the filter is 20-80%, and preferably 60-80%.
As an improvement, the adhesive material is one of polyurethane, epoxy resin, organic silica gel, acrylate glue, polyvinyl acetate and copolymer thereof, unsaturated polyester, phenolic resin, urea-formaldehyde resin, polycyanum-formaldehyde resin and rubber adhesive.
As an improvement, the wrapping material is cigarette paper.
As an improvement, the length of the filter is 0.2-2.0 cm.
The invention also provides application of the hollow fiber-based rapid heat absorption filter in tobacco products.
The invention principle is as follows:
the hollow fiber structure not only greatly improves the contact exchange specific surface of the filter and the flue gas, but also the slender pore canal of the hollow fiber structure plays the role of throttling and cooling. In the invention, the hollow fiber gaps of the filter are filled with adhesive materials, the porous plug is similar to a porous plug which is fully distributed with parallel capillary channels, and high-temperature smoke can only pass through the inner pipe diameter of the hollow fiber. Because the channel shrinks rapidly, the smoke flow is obstructed, the pressure becomes smaller gradually, and the temperature also falls. Generally, the thinner the hollow fibers and the longer the length, the more pronounced the throttling effect, but the correspondingly less well the flue gas flow. Therefore, the size of the hollow fiber should be controlled within a certain range.
The adhesive material is filled in the gaps of the hollow fibers in a large amount, and is a strong heat energy storage besides the function of shrinking the smoke circulation pore passage. The adhesive adopted by the invention has the glass transition temperature of less than 80 ℃, the melting point of less than 200 ℃ and the specific heat capacity of more than 1.5 kJ.kg-1·K-1The sensible heat value of the adhesive is far higher than that of a common polymer material, the adhesive has a wide temperature range of absorbing heat but not deforming near the temperature of comfortable mouthfeel of a human body, and can absorb a large amount of heat attached to high-temperature smoke.
Compared with the prior art, the invention has the beneficial effects that:
1. the hollow fiber clearance of filter has been filled with adhesive material, is similar to a porous stopper that is covered with parallel capillary pore canal, and high temperature flue gas can only pass through from hollow fiber inside pipe diameter, and the runner sectional area shrinks suddenly, and the flue gas velocity of flow accelerates, and pressure drops, utilizes throttle effect to reduce the flue gas temperature.
2. The adhesive with high sensible heat value is used as an adhesive material, the glass transition temperature is less than 50 ℃, the melting point is less than 200 ℃, and the specific heat capacity is more than 1.5 kJ.kg-1·K-1The cigarette has a wide temperature range of absorbing heat but not deforming near the temperature of comfortable mouthfeel of human bodies, and can absorb a large amount of heat attached to high-temperature smoke.
3. The hollow fiber structure greatly improves the contact exchange specific surface of the filter and the flue gas, thereby improving the heat exchange rate and quickly reducing the instantaneous temperature of the high-temperature flue gas.
Drawings
FIG. 1 is a schematic radial cross-sectional view of a hollow fiber-based rapid heat absorption filter of the present invention;
fig. 2 is a schematic view of the positions of temperature measuring points in embodiments 1 to 10 of the present invention.
In the figure, 1-wrapper; 2-hollow fibers; 3-a tacky material; 4-a segment of tobacco material; 5-a ternary composite filter tip; 6-a first temperature measuring point; 7-a second temperature measuring point; 8-third temperature measuring point.
Detailed Description
The following examples are presented to enable those skilled in the art to more fully understand the present invention and are not intended to limit the invention in any way.
A hollow fiber-based rapid heat absorption filter is 0.2-2.0 cm in length and comprises a wrapping material 1, hollow fibers 2 and an adhesive material 3; the hollow fibers 2 which are arranged in parallel and are agglomerated into bundles are wrapped in the wrapping material 1 to form uniform cylindrical bars, and the filling rate of the hollow fibers 2 is 20-80%. The hollow fiber 2 is a hollow fiber tube, a hollow fiber ultrafiltration membrane or a hollow fiber microfiltration membrane, the diameter is 0.2-1.3 mm, and the wall thickness is 0.04-0.30 mm; the gaps between the hollow fibers 2 are filled with adhesive materials 3 for sealing and fixing the hollow fibers, and the adhesive materials 3 have a glass transition temperature of less than 80 ℃, a melting point of less than 200 ℃ and a specific heat capacity of more than 1.5 kJ.kg-1·K-1The adhesive of (1); the axial channels inside the hollow fibers 2 form gas flow channels.
The hollow fiber 2 is made of polysulfone, polyethersulfone, polyethersulfoneketone, sulfonated polysulfone, polyvinylidene fluoride, polytetrafluoroethylene, polyperfluorocarbonic acid, polyperfluorosulfonic acid, cellulose acetate, cellulose nitrate, carboxymethyl cellulose, ethyl cellulose, regenerated cellulose, polyamide, polyimide, polyphenylsulfone terephthalamide, aromatic polyamide hydrazide, polypropylene, polyethylene and polyacrylonitrile, polyvinyl chloride, polyacrylic acid, polyvinyl alcohol, polyacrylamide, polystyrene, ethylene-vinyl alcohol copolymer, polyurethane, polyethylene terephthalate, polybutylene terephthalate, polymethyl methacrylate, polybenzimidazole, polypyrazine amide, chitosan, chitin, polylactic acid, polyelectrolyte, polyether block copolymer, polyvinylpyrrolidone, polyisophthaloyl metaphenylene diamine and organic silicon or a mixture of any two of the above.
The adhesive material 3 is one of polyurethane, epoxy resin, organic silica gel, acrylate adhesive, polyvinyl acetate and copolymer thereof, unsaturated polyester, phenolic resin, urea-formaldehyde resin, polycyanum amine formaldehyde resin and rubber adhesive.
Example 1
As shown in figure 1, the rapid heat absorption filter based on the hollow fiber is formed by wrapping a plurality of polyvinylidene fluoride hollow fiber ultrafiltration membranes which are arranged in parallel and coalesced into bundles by cigarette paper to form a cylindrical bar material with uniform length of 0.2 cm. The diameter of the polyvinylidene fluoride hollow fiber ultrafiltration membrane is 0.2mm, the wall thickness is 0.04mm, and the filling rate is 80%. Polyurethane is filled in gaps among the polyvinylidene fluoride hollow fiber ultrafiltration membranes for sealing and fixing the polyvinylidene fluoride hollow fiber ultrafiltration membranes.
Example 2
As shown in figure 1, the rapid heat absorption filter based on the hollow fiber is formed by wrapping a plurality of sulfonated polysulfone-polysulfone hollow fiber ultrafiltration membranes which are arranged in parallel and coalesced into bundles by cigarette paper to form a uniform cylindrical bar with the length of 0.4 cm. The diameter of the sulfonated polysulfone-polysulfone hollow fiber ultrafiltration membrane is 0.3mm, the wall thickness is 0.05mm, and the filling rate is 76%. And epoxy resin is filled in gaps among the sulfonated polysulfone-polysulfone hollow fiber ultrafiltration membranes for sealing and fixing the sulfonated polysulfone-polysulfone hollow fiber ultrafiltration membranes.
Example 3
As shown in figure 1, the rapid heat absorption filter based on the hollow fiber is formed by wrapping a plurality of polyether sulfone hollow fiber ultrafiltration membranes which are arranged in parallel and coalesced into a bundle by cigarette paper to form a cylindrical bar material with the uniform length of 0.6 cm. The diameter of the polyether sulfone hollow fiber ultrafiltration membrane is 0.4mm, the wall thickness is 0.06mm, and the filling rate is 74%. Organic silica gel is filled in gaps among the polyether sulfone hollow fiber ultrafiltration membranes for sealing and fixing the polyether sulfone hollow fiber ultrafiltration membranes.
Example 4
As shown in figure 1, the rapid heat absorption filter based on the hollow fibers is formed by wrapping a plurality of parallel-arranged cellulose acetate hollow fiber tubes which are coalesced into bundles by cigarette paper to form a uniform cylindrical bar with the length of 0.8 cm. The diameter of the cellulose acetate hollow fiber tube is 0.5mm, the wall thickness is 0.08mm, and the filling rate is 72%. And acrylate glue is filled in the gap between the cellulose acetate hollow fiber tubes for sealing and fixing the cellulose acetate hollow fiber tubes.
Example 5
As shown in figure 1, the rapid heat absorption filter based on the hollow fiber is formed by wrapping a plurality of polyacrylonitrile hollow fiber micro-filtration membranes which are arranged in parallel and coalesced into bundles by cigarette paper to form a uniform cylindrical bar material with the length of 1.0 cm. The diameter of the polyacrylonitrile hollow fiber micro-filtration membrane is 0.6mm, the wall thickness is 0.1mm, and the filling rate is 70%. Polyvinyl acetate is filled in the clearance of the polyacrylonitrile hollow fiber micro-filtration membrane for sealing and fixing the polyacrylonitrile hollow fiber micro-filtration membrane.
Example 6
As shown in figure 1, the rapid heat absorption filter based on the hollow fiber is formed by wrapping a plurality of polyvinyl chloride hollow fiber micro-filtration membranes which are arranged in parallel and are coalesced into bundles by cigarette paper to form a uniform cylindrical bar material with the length of 1.5 cm. The diameter of the polyvinyl chloride hollow fiber microfiltration membrane is 0.9mm, the wall thickness is 0.2mm, and the filling rate is 60%. The gap between the polyvinyl chloride hollow fiber microfiltration membranes is filled with rubber adhesive for sealing and fixing the polyvinyl chloride hollow fiber microfiltration membranes.
Example 7
As shown in figure 1, the rapid heat absorption filter based on the hollow fiber is formed by wrapping a plurality of polytetrafluoroethylene hollow fiber tubes which are arranged in parallel and are coalesced into bundles by cigarette paper to form a uniform cylindrical bar material with the length of 2.0 cm. The diameter of the polytetrafluoroethylene hollow fiber tube is 1.3mm, the wall thickness is 0.3mm, and the filling rate is 20%. Unsaturated polyester is filled in gaps among the polytetrafluoroethylene hollow fiber tubes and used for sealing and fixing the polytetrafluoroethylene hollow fiber tubes.
Example 8
As shown in figure 1, the rapid heat absorption filter based on the hollow fibers is formed by wrapping a plurality of polypropylene hollow fiber tubes which are arranged in parallel and are coalesced into bundles by cigarette paper to form a uniform cylindrical bar with the length of 0.6 cm. The diameter of the polypropylene hollow fiber tube is 0.2mm, the wall thickness is 0.04mm, and the filling rate is 80%. And phenolic resin is filled in gaps among the polypropylene hollow fiber tubes and is used for sealing and fixing the polypropylene hollow fiber tubes.
Example 9
As shown in figure 1, the rapid heat absorption filter based on the hollow fibers is formed by wrapping a plurality of polyethylene hollow fiber ultrafiltration membranes which are arranged in parallel and coalesced into bundles by cigarette paper to form a uniform cylindrical bar with the length of 0.8 cm. The diameter of the polyethylene hollow fiber ultrafiltration membrane is 0.3mm, the wall thickness is 0.06mm, and the filling rate is 76%. The gap between the polyethylene hollow fiber ultrafiltration membranes is filled with urea resin for sealing and fixing the polyethylene hollow fiber ultrafiltration membranes.
Example 10
As shown in figure 1, the rapid heat absorption filter based on the hollow fiber is formed by wrapping a plurality of polylactic acid hollow fiber tubes which are arranged in parallel and are coalesced into bundles by cigarette paper to form a uniform cylindrical bar material with the length of 1.0 cm. The diameter of the polylactic acid hollow fiber tube is 0.4mm, the wall thickness is 0.06mm, and the filling rate is 74%. The gaps among the polylactic acid hollow fiber tubes are filled with the polycyanum amine formaldehyde resin for sealing and fixing the polylactic acid hollow fiber tubes.
It is worth noting that: in addition to the above examples, the skilled person without inventive effort replaces the hollow fiber material with the following: polyethersulfoneketone, polyperfluorocarboxylic acid, polyperfluorosulfonic acid, cellulose nitrate, carboxymethylcellulose, ethylcellulose, regenerated cellulose, polyamide, polyimide, polyphenylsulfone terephthalamide, aromatic polyamide hydrazide, polyacrylic acid, polyvinyl alcohol, polyacrylamide, polystyrene, ethylene-vinyl alcohol copolymer, polyurethane, polyethylene terephthalate, polybutylene terephthalate, polymethyl methacrylate, polybenzimidazole, polypyrazinamide, chitosan, chitin, polyelectrolyte, polyether block copolymer, polyvinylpyrrolidone, polyisophthaloyl metaphenylene diamine, silicone, and combinations of any two thereof, the remaining conditions being set forth in the above examples, all to the desired effect.
The hollow fiber-based rapid heat absorption filter obtained in each of the above examples was evaluated by the following test methods, and the test results are shown in table 1.
1. Test of cooling effect
And (3) forming a quaternary composite structure (a tobacco material section 4+ a ternary composite filter tip rod 5) by the obtained hollow fiber-based rapid heat absorption filter and the tobacco material, wherein the middle section of the ternary composite filter tip rod is the hollow fiber-based rapid heat absorption filter. In the experiment, 3 temperature measuring points 6, 7 and 8 are selected and are respectively positioned at the circle centers of the cross sections of the cigarettes at corresponding positions, as shown in figure 1.
The temperature drop amplitude calculation method comprises the following steps: x ═ TFirst temperature measuring point-TSecond point of temperature measurement)/TFirst temperature measuring point
TABLE 1 cigarette temperature test results using filters of different embodiments
The actual scope of the invention encompasses not only the disclosed embodiments, but also all equivalent ways of practicing or implementing the invention under the claims.
Claims (7)
1. A hollow fiber-based rapid heat absorption filter comprising a wrapping material; the hollow fiber composite material is characterized by also comprising hollow fibers and adhesive materials; a plurality of hollow fibers which are arranged in parallel and are coalesced into bundles are wrapped in the wrapping material to form uniform cylindrical bars, and the gaps among the hollow fibers are filled with adhesive materials for sealing and fixing the hollow fibers; the axial pore canal in the hollow fiber forms a gas flow passage; the adhesive material has a glass transition temperature of less than 80 ℃, a melting point of less than 200 ℃ and a specific heat capacity of more than 1.5 kJ.kg-1·K-1The adhesive of (1);
the adhesive material is one of polyurethane, epoxy resin, organic silica gel, acrylate adhesive, polyvinyl acetate and copolymer thereof, unsaturated polyester, phenolic resin, urea-formaldehyde resin, polycyanum amine formaldehyde resin and rubber adhesive.
2. The filter of claim 1, wherein the hollow fiber is a hollow fiber tube, a hollow fiber ultrafiltration membrane or a hollow fiber microfiltration membrane, and has a diameter of 0.2 to 1.3mm and a wall thickness of 0.04 to 0.30 mm.
3. The filter of claim 1, wherein the hollow fiber is selected from the group consisting of polysulfone, polyethersulfone, polyethersulfoneone, sulfonated polysulfone, polyvinylidene fluoride, polytetrafluoroethylene, polyperfluorocarboxylic acid, polyperfluorosulfonic acid, cellulose acetate, cellulose nitrate, carboxymethyl cellulose, ethyl cellulose, regenerated cellulose, polyamide, polyimide, polyphenylsulfone terephthalamide, aromatic polyamide hydrazide, polypropylene, polyethylene, polyacrylonitrile, polyvinyl chloride, polyacrylic acid, polyvinyl alcohol, polyacrylamide, polystyrene, ethylene-vinyl alcohol copolymer, polyurethane, polyethylene terephthalate, polybutylene terephthalate, polymethyl methacrylate, polybenzimidazole, polypyrazine amide, chitosan, chitin, polylactic acid, polyelectrolyte, polyether block copolymer, polyvinylpyrrolidone, and cellulose acetate, One or a mixture of any two of polyisophthaloyl metaphenylene diamine and organosilicon.
4. The filter of claim 1, wherein the filter has a hollow fiber filling rate of 20 to 80%.
5. A filter as set forth in claim 1 wherein said wrapper is cigarette paper.
6. The filter of claim 1, wherein the filter length is 0.2-2.0 cm.
7. Use of a hollow fibre based rapid heat absorption filter as claimed in any of claims 1 to 6 in a smoking article.
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| CN201810451924.1A CN108391849B (en) | 2018-05-12 | 2018-05-12 | Rapid heat absorption filter based on hollow fibers and application thereof |
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| CN201810451924.1A CN108391849B (en) | 2018-05-12 | 2018-05-12 | Rapid heat absorption filter based on hollow fibers and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109652890A (en) * | 2019-02-20 | 2019-04-19 | 南通薇星纺织科技有限公司 | A kind of towel fabric that moisture absorption is ventilative |
| CN110292207A (en) * | 2019-03-21 | 2019-10-01 | 重庆中烟工业有限责任公司 | Aerosol cooling filter element and low temperature cigarette |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1132052A (en) * | 1994-10-21 | 1996-10-02 | 大世吕化学工业株式会社 | Tobacco smoke filter materials, fibrous cellulose esters, and production processes |
| CN103763949A (en) * | 2011-04-08 | 2014-04-30 | R·J·雷诺兹烟草公司 | Filtered cigarette comprising a tubular element in filter |
| CN104994756A (en) * | 2013-03-13 | 2015-10-21 | 塞拉尼斯醋酸纤维有限公司 | Smoke filters for reducing components in a smoke stream |
| KR20170002778A (en) * | 2015-06-29 | 2017-01-09 | 주식회사 휴비스 | Filter comprising polylactide fibre with non round cross section |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160165950A1 (en) * | 2014-12-12 | 2016-06-16 | Lorillard Tobacco Company | Reduction of carbon monoxide in mainstream cigarette smoke |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1132052A (en) * | 1994-10-21 | 1996-10-02 | 大世吕化学工业株式会社 | Tobacco smoke filter materials, fibrous cellulose esters, and production processes |
| CN103763949A (en) * | 2011-04-08 | 2014-04-30 | R·J·雷诺兹烟草公司 | Filtered cigarette comprising a tubular element in filter |
| CN104994756A (en) * | 2013-03-13 | 2015-10-21 | 塞拉尼斯醋酸纤维有限公司 | Smoke filters for reducing components in a smoke stream |
| KR20170002778A (en) * | 2015-06-29 | 2017-01-09 | 주식회사 휴비스 | Filter comprising polylactide fibre with non round cross section |
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