CN100496312C - Cigarette filter - Google Patents
Cigarette filter Download PDFInfo
- Publication number
- CN100496312C CN100496312C CNB028176693A CN02817669A CN100496312C CN 100496312 C CN100496312 C CN 100496312C CN B028176693 A CNB028176693 A CN B028176693A CN 02817669 A CN02817669 A CN 02817669A CN 100496312 C CN100496312 C CN 100496312C
- Authority
- CN
- China
- Prior art keywords
- cigarette
- cigarette filter
- sorbent segment
- stopper
- general
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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
- A24D3/16—Use of materials for tobacco smoke filters of inorganic materials
- A24D3/163—Carbon
-
- 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
- A24D3/12—Use of materials for tobacco smoke filters of ion exchange materials
-
- 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
- A24D3/16—Use of materials for tobacco smoke filters of inorganic materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
A cigarette filter that includes a multiple section filter which reduces the level of predetermined smoke constituents. The filter (130) consists of a fibrous filter plug (132) located at the mouth-end of the cigarette, a section (136) containing a selective adsorbent material, and a section (134) containing a general adsorbent material. The selective adsorbent material, such as a phenol-formaldehyde resin matrix surface-functionalized with mainly primary and secondary amine functional groups, removes specific smoke constituents from the tobacco smoke. The general adsorbent material, such as activated charcoal, is preferably capable of adsorbing a range of chemical compounds without a high degree of specificity. Structurally, the fibrous filter plug, the selective adsorbent section, and the general adsorbent section are co-axially aligned in tandem.
Description
Technical field
The application requires the priority of following application: U.S.Provisional Application Ser.No.60/309,338, filed August1,2001, U.S.Provisional Application Ser.No.60/309,435, filed August 2001, U.S.Patent Application Ser.No.10/011,841, filed October 30,2001, the full content of above-mentioned application is incorporated herein, and is for reference.
The present invention relates to a kind of cigarette filter, it contains a kind of smoke components adsorbent, when combining with a kind of carbon back filtering material, shows the reduction that the smoke vapor components is collaborative.
Background technology
Cigarette comprises tobacco rod or post, produces specific and a steam mutually when it burns.Before about 70 years, filter tip begins to be engaged to a pipe tobacco post.Except other thing, filter removed various smoke components.Filter tip is made by fiber or fibrous material, such as cellulose acetate tow or paper, removes the particle phase of pipe tobacco smog by mechanical mode.Yet fibrous material can not be removed the component of volatilization effectively, such as, acetaldehyde, hydrogen cyanide and hydrogen sulfide, they form gas phase.Typically, a kind of adsorbent combines with fibrous material, to improve the removing of gaseous component.For example, cigarette filter has the activated carbon of adding, the mineral of porosity, and such as sepiolite, silica dioxide gel, cationic ion-exchange resin and anion exchange resin.
Charcoal has high per surface area, and is a kind of stronger adsorbent of forming for the gas phase of cigarette smoke.When the mixture that uses metal oxide applied, charcoal was effective to removing sour gas especially.
Sepiolite has a big adsorption area, and has the strong adsorption affinity of charged material, but the absorption compatibility lower to non-polarised material.Silica dioxide gel is considered to the adsorbent for the weak maintenance of the gas phase composition of pipe tobacco smog usually.Though silica dioxide gel easily absorbs acetaldehyde and hydrogen cyanide, this component is also easily discharged by silica dioxide gel.Cationic ion-exchange resin has been proposed to be used in the removing of nicotine.Anion exchange resin has been proposed to be used in the removing of nicotinic acid, but strongly basic anionite is to the not effect of gas phase acetaldehyde of smog.The weak-base anion-exchange resin of porosity structure is fit to be used in the removing of nicotinic acid and acetaldehyde, but their effect reduces as the mineral of carbon and porosity when smoking.
Two or more adsorbents can use in cigarette filter in combination.For example, United States Patent (USP) U.S.Patent 2,815,760 disclose the use of a kind of ion exchange material and some materials, harmful, non-alkalescence, the non-acid component chemical reaction of it and smog forming non-volatile compound, thereby remains on the latter in the filter tip.Yet above-mentioned additive fails to produce these smog phase components of removing of satisfied selection, such as, smog acetaldehyde, especially acetaldehyde and methacrylaldehyde.United States Patent (USP) U.S.Patent 4,300,577 discloses a kind of weak adsorbent that keeps and is used in gaseous component, and it mainly is that second constituent element of first amino functional group mixes with having, and is used for removing the gaseous component of pipe tobacco smog, comprises acetaldehyde and hydrogen cyanide.But the filter tip of patent ' 577 does not demonstrate appropriate users approval property or commercial feasibility.
Summary of the invention
The present invention relates to a kind of cigarette filter, comprise the filter tip of a multistage, it reduces the level of predetermined smoke components.Filter tip comprises the filtration stopper of a fiber, is positioned at the mouth end of cigarette, one section absorbing material that contains a kind of selection, and one section contain a kind of general absorbing material.
The present invention proposes a kind of cigarette filter of multistage, and it comprises: (a) the filtration stopper of a fiber; (b) one is placed in abutting connection with the sorbent segment of the selection of the tobacco rod of cigarette, it contains a kind of for the ion exchange resin of phenolic resin as matrix resin, this ion exchange resin is to use first surface-functionalized with amine groups secondary, this ion exchange resin has a surface area, and this area guarantees that enough the surface action position can easily reach for smoke components; And (c) general sorbent segment, contain a kind of general sorbent material, be selected from the material in following group, this group comprises active charcoal, active cocoanut shell carbon, active coal-based carbon, zeolite, silica dioxide gel, sepiolite, aluminium oxide, the coal-based charcoal of making by semianthractie, by the resin of the styrene-carbon containing that the divinylbenzene pyrolysis is derived of sulfonation, or the combination of these materials, above-mentioned general sorbent segment is positioned between the sorbent segment of the filtration stopper of above-mentioned fiber and above-mentioned selection, the filtration stopper of described fiber, the sorbent segment of described selection and described general sorbent segment are arranged in series coaxially.
Filtering stopper can be filtration stopper known in any technology, such as, acetate tow.General sorbing material preferably is selected from the material of one group of high surfaces area, such as, activated charcoal, it can absorb a series of compound, and does not have the characteristic of height.The sorbing material of selecting is to select according to the specific smoke components that target is removed.Best, the sorbing material of selection is by one group of function of surface Choice of Resin, and wherein every kind of resin comprises a kind of carrier of inertia in fact, has surface area greater than about 35m
2/ g.In one embodiment of the invention, the sorbing material of selection is a kind of phenolic resin as matrix resin, and it is surface-functionalized mainly to be to use amino functional first and secondary to roll into a ball.
Structurally, the sorbing material of selection can be positioned between the sorbent segment and filtration stopper of selection in abutting connection with tobacco rod and general sorbing material.The scheme that replaces is, general sorbing material can be positioned at sorbing material in abutting connection with tobacco rod and selection in general sorbent segment with filter between the stopper.Preliminary data point out that preceding a kind of orientation produces a collaborative effect that reduces smoke components with respect to a kind of orientation in back.Moreover the adsorbent of selection and general adsorbent can be dispersed in a kind of traditional filtration stopper material, and such as cellulose acetate, perhaps adsorbent can be packaged in filtering stopper material a liner or thin layer section.
Description of drawings
Fig. 1 is the perspective view of a cigarette with filter tip of prior art;
Fig. 2 is filter-tip perspective view of cigarette made in accordance with the present invention, and wherein adsorbent is to be dispersed in whole a kind of filtration stopper material, and general sorbent segment is positioned between the sorbent segment of filtering stopper and selection;
Fig. 3 is filter-tip perspective view of cigarette made in accordance with the present invention, and wherein adsorbent is to be dispersed in whole a kind of filtration stopper material, and the sorbent segment of selecting is positioned at and filters between stopper and the general sorbent segment;
Fig. 4 is filter-tip perspective view of cigarette made in accordance with the present invention, and wherein adsorbent package is a liner in filtering stopper material;
Fig. 5 is the drawing in side sectional elevation of one embodiment of the present of invention, and has and filter stopper and be arranged between the sorbent segment of general sorbent segment and selection;
Fig. 6 is the drawing in side sectional elevation of one embodiment of the present of invention, and has the end of filtration stopper in abutting connection with tobacco rod;
Fig. 7 is the drawing in side sectional elevation of one embodiment of the present of invention, and has adsorbent with one of fiber filter material independent length segmentation; And
Fig. 8 is the drawing in side sectional elevation of one embodiment of the present of invention, does not filter the stopper section.
The specific embodiment
Cigarette filter of the present invention comprises the filter tip of a multistage, and it reduces the level of predetermined smoke components.Filter tip comprises the filtration stopper of a fiber, is positioned at the mouth end of cigarette, one section sorbing material that contains a kind of selection, and one section contain a kind of general sorbing material.
As shown in Figure 1 and known by technology, a typical cigarette with filter tip 10 has a filter tip 30, is connected to a tobacco rod 20.Tobacco rod 20 comprises a loose mixture that contains pipe tobacco 22, be wrapped in the cigarette paper 24, and filter tip 30 comprises that a filtration stopper 32 is wrapped in the stopper parcel 34.An end paper 36 engages filter tip 30 to tobacco rod 20.
In the present invention, as shown in Figure 2, a cigarette 110 has the filter tip 130 of a multistage, is connected to tobacco rod 20.Filter tip 130 comprises that a filtration stopper contains general adsorbent 134 and one section adsorbent 136 that contains selection for 132, one sections.Filtration stopper 132 is first end or the mouth ends 131 in abutting connection with filter tip 130.Adsorbent 136 liners of selecting are second end or the tobacco rod end 137 in abutting connection with filter tip 130.The liner of general adsorbent 134 is positioned between adsorbent 136 liners that filter stopper 132 and select.
General sorbent segment 134 comprises a kind of general sorbing material 144, is dispersed in the whole filtering plug material 142, than a kind of " dual-dalmatian " filter tip as well known in techniques.General sorbing material 144 is preferably selected by the material of one group of high surfaces area, and it can adsorb smoke components, and does not have the characteristic of height.For example, general adsorbent can be selected from active charcoal, active cocoanut shell carbon, active coal-based carbon, zeolite, silica dioxide gel, sepiolite, aluminium oxide or their combination, and the mineral sill charcoal of making by semianthractie, and (supplier is Calgon Carbon than cocoanut shell carbon about 50% to have density, Pittsburgh, PA), Armbersorb 572 or Ambersorb 563 are (by the resin of the styrene-carbon containing that the divinylbenzene pyrolysis is derived of sulfonation, supplier is Rohm and Hass, 5000Richmond street, Philadelphia, PA 19137), has similar particle size, surface area, the material of other of bonding affinity, or their combination.In order more to strengthen the effect of general adsorbent, the compound of metal oxide or other Metal Substrate can join in the general sorbent segment.
The sorbent segment of selecting 136 comprises a kind of sorbing material 146 of selection, is dispersed in the whole filtration stopper material 142, such as, known a kind of " dual-dalmatian " filter tip in the technology.The sorbent material of selecting 146 is preferably selected the compound of predetermined kind according to the characteristic of material 146, for example, the sorbent material of selecting 146 can be a kind of ion exchange resin, (supplier is Rohm and Hass.5000 Richmond Street such as Duolite A7, Philadelphia, PA 19137) or material with similar functional group and bonding affinity.Duolire A7 has phenolic resin as matrix resin, and be to use first surface-functionalized with amine groups secondary, thereby strengthen these resins to the acetaldehyde found in the pipe tobacco smog and the characterization of adsorption of hydrogen cyanide.
Moreover, the selection of the sorbing material of selecting 146 must consider that but the contact conditions between pipe tobacco smog and the sorbing material 146 depends on a series of changing factor, comprise that the smoker drew smog by filter-tip intensity when cigarette was inhaled, and before each aerosol spraying tobacco rod consumption what.Therefore, advantageously, the adsorbent 146 of selection has a surface area greater than about 35m
2/ g, thus minimum diffusional resistance obtained, and the surface area site of action can easily reach.The material that has bigger surface area also demonstrates more unconspicuous performance and descends, and as a kind of plasticizer of the surface-coated of fruit part, it can occur in adsorbent 146 and be dispersed in when filtering stopper 142.
When cigarette was consumed, pipe tobacco smog was sprayed by filter tip 130 by the smoker.Smog begins to advance by the sorbent segment of selecting 136, and the smoke components of target is attracted on the surface of sorbing material 146 of selection herein, and the particulate matter in the smog is filtered stopper material 142 and keeps.Remaining smog advances subsequently by general sorbent segment 134, and other smoke components is adsorbed material 144 maintenances herein, and additional particulate matter is filtered stopper material 142 maintenances.At last, remaining smog advances subsequently by filtering stopper 132, and Fu Jia particulate matter can be eliminated herein.Filtered smog sends the smoker subsequently to.
In the embodiment of first demonstration of the present invention, as shown in Figure 2, the filter tip 110 of multistage is made for has a filtration stopper 132, make by acetate tow, the about 7mm of length, and has a general sorbent segment 134, the cocoanut shell carbon 144 that comprises the 40mg activity, be dispersed in the whole acetate tow 142, cut-out is with one section 134 of the about 10mm of acquisition length, wherein acetate tow is handled with a kind of plasticizer, and sorbent segment 136 with a selection, comprise that 40mg Duolite A7 is dispersed in the whole acetate tow 142, cut-out is with one section 136 of the about 10mm of acquisition length, and wherein acetate tow is handled with a kind of plasticizer.When tobacco rod is during with a normal puff/rest circulating combustion, discharge the analysis showed that of flue gas at terminal 131 places of mouth of cigarette 110, with the cigarette that only uses similar resin filter mouth relatively, reduced the level of following compounds statistically significantly: hydrogen cyanide, furans, propionic aldehyde, acetone, methyl ethyl ketone/butyraldehyde, hydrogen sulfide, 1,3 butadiene, 2 methyl propanal, isoprene, styrene, pyridine, toluene and benzene.When tobacco rod is during with a normal puff/rest circulating combustion, discharge the analysis showed that of flue gas at terminal 131 places of mouth of cigarette 110, with the cigarette with filter tip that only uses charcoal relatively, reduced the level of following compounds statistically significantly: pyridine, hydrogen cyanide, hydrogen sulfide, styrene, 2 methyl propanal, benzene, propionic aldehyde, furans, isoprene, 1,3 butadiene, crotonaldehyde, acetone, acrylonitrile, acetaldehyde, toluene, carbon disulfide, methyl ethyl ketone/butyraldehyde, propionic aldehyde, acetonitrile and methyl alcohol.
As shown in Figure 2, the filter tip 130 of multistage has the stopper 132 of filtration, and in abutting connection with mouth end 131, the adsorption section 136 of selection is in abutting connection with tobacco rod end 137, and general sorbent segment 134 is positioned between the sorbent segment 136 of filtering stopper 132 and selecting.
In the embodiment of a replacement, as shown in Figure 3, cigarette 210 has the filter tip 230 of a multistage, wherein filter stopper 132 and be positioned at mouth end 131, general sorbent segment 134 is in abutting connection with tobacco rod end 137, and the sorbent segment of selecting 136 is interposed in and filters between stopper 132 and the general sorbent segment 134.In this embodiment, when normal puff, smog at first advances by general sorbent segment 134, the sorbent segment 136 by selecting, and the final filtration stopper 132 that passes through subsequently.Moreover, the filter tip 230 of multistage be in fact with the filter tip 130 identical (Fig. 2) of embodiment of first demonstration, its difference be general sorbent segment 134 in abutting connection with tobacco rod 20, and the sorbent segment of selecting 136 is interposed in and filters between stopper 132 and the general sorbent segment 134.When tobacco rod is during with a normal puff/rest circulating combustion, the flue gas analysis of discharging terminal 131 places of mouth (Fig. 3) of cigarette 210 shows, with the cigarette that only uses similar resin filter mouth relatively, reduced the level of following compounds statistically significantly: propionic aldehyde, acetone, methyl ethyl ketone/butyraldehyde, crotonaldehyde, hydrogen sulfide, 2 methyl propanal, pyridine, methacrylaldehyde, toluene, acetaldehyde, acrylonitrile, methyl alcohol and benzene.When tobacco rod is during with a normal puff/rest circulating combustion, the flue gas analysis of discharging terminal 131 places of mouth of cigarette 210 shows, with the cigarette that only uses the charcoal filtering mouth relatively, reduced the level of following compounds statistically significantly: pyridine, hydrogen cyanide, benzene, propionitrile, crotonaldehyde, acetone, acrylonitrile, acetaldehyde, toluene, carbon disulfide, methyl ethyl ketone/butyraldehyde, propionic aldehyde, acetonitrile and methyl alcohol.
As shown in another embodiment shown in Figure 4, in the multi-segment filter 330 of cigarette 310, adsorbent 144, the 146th, be packaged in the thin layer section of the adsorbent 346 of the thin layer section of general adsorbent 344 and selection and filter in the stopper material, in the present embodiment, the adsorbent of layer packing disperses adsorbent to be exposed to less plasticizer than bundle, and keeps bigger surface area, is used for reacting to each other with smoke components.Moreover as shown in FIG. 7, the filter tip 630 of a multistage of a cigarette 610 comprises general adsorbent 344 and the adsorbent of selecting 346, is dispersed in the single section of an independent length of fiber filter material 342.
The advantage of the embodiment 110 of Fig. 2 is that smog advanced by the sorbing material of selecting 146 before advancing by general adsorbent 144.The sorbing material that allows like this to select was removed some specific smoke components before general sorbing material is exposed to smog, thereby made general adsorbent 144 more effectively remove remaining smoke components.Therefore, arrange relatively the effect of the cooperation of adsorbent in finding to arrange here for cellulose acetate/general adsorbent/specific adsorbent with the adsorbent of the adsorbent of cellulose acetate/specific/general.
As shown in Fig. 5 and 6, respectively the filter tip 430 and 530 of cigarette 410 and 510 multistage be arranged on general sorbent segment 134 and the sorbent segment 136 selected between (Fig. 5), and in abutting connection with the end (Fig. 6) of tobacco rod 20.In Fig. 5, the sorbent segment 136 of selection is positioned at the mouth end of filter tip 430, and in Fig. 6, general sorbent segment 134 is positioned at the mouth end of filter tip 530.Moreover as shown in FIG. 8, the filter tip 730 of a multistage of cigarette 710 only comprises the sorbent segment 136 of a general sorbent segment 134 and a selection.
Following examples is the representative of removing the embodiment of performance preparation according to the smoke components of the present invention and these embodiment.The proposition of these embodiment is the purpose in order to demonstrate wittingly only, and is not wittingly in order to limit its scope.
Example 1: the cigarette 110 of filter tip 130 that has a multistage is by preparation shown in Figure 2, one of them filters the manufacturing of stopper 132 usefulness acetate tow, and the about 7mm of length, a general sorbent segment 134 contains the cocoanut shell charcoal 144 of the 40mg activity of having an appointment, be dispersed in the acetate tow 142 of whole plasticizer processing, cutting is with one section 134 of the about 10mm of acquisition length, and the sorbent segment 136 of a selection, contain the 40mg DuoliteA7 that has an appointment, be dispersed in the acetate tow of whole plasticizer processing, cutting is with one section of the about 10mm of acquisition length.Filter tip is connected to tobacco rod, has the about 56.5mm of length, and contains the typical non-menthol cigarette compound of the 617mg that has an appointment (non-menthol cigarette blend) and be wrapped in the 50 Coresta cigarette paper that have about 1.8% citrate.This cigarette is supplied with about 10.3mg tar/every cigarette.
Example 2: the cigarette 210 of filter tip 230 that has a multistage is by preparation shown in Figure 3, wherein filter stopper 132, general sorbent segment 134 and the sorbent segment of selecting 136 are and the filtration stopper 132 of example 1 that general sorbent segment 134 and the sorbent segment of selecting 136 are identical in fact.Filter tip is connected to a tobacco rod, has the about 56.5mm of length and contains the typical non-menthol cigarette compound of 617mg, is wrapped in the 50 Coresta cigarette paper that have about 1.8% citrate.This cigarette is supplied with about 10.0mg tar/every cigarette.
Example 3: according to the cigarette that example 1 is prepared, its difference is that about 20mg Duolite A7 uses in the sorbent segment of selecting 136, to replace 40mg.This cigarette is supplied with about 10.2mg tar/every cigarette.
Example 4: according to the cigarette that example 2 is prepared, its difference is that about 20mg Duolite A7 uses in the sorbent segment of selecting 136, to replace 40mg.This cigarette is supplied with about 10.9mg tar/every cigarette.
Example 5: according to the cigarette that example 1 is prepared, its difference is that about 60mg Duolite A7 uses in the sorbent segment of selecting 136, to replace 40mg.This cigarette is supplied with about 10.0mg tar/every cigarette.
Example 6: according to the cigarette that example 2 is prepared, its difference is that about 60mg Duolite A7 uses in the sorbent segment of selecting 136, to replace 40mg.This cigarette is supplied with about 10.3mg tar/every cigarette.
Example 7: according to the cigarette that example 1 is prepared, its difference is that the mineral sill charcoal that about 69mg is made by semianthractie uses in general sorbent segment 136, to replace the cocoanut shell charcoal of 40mg activity.This cigarette is supplied with about 10.1mg tar/every cigarette.
Example 8: according to the cigarette that example 2 is prepared, its difference is that the mineral sill charcoal that about 69mg is made by semianthractie uses in general sorbent segment 136, to replace 40mg cocoanut shell charcoal.This cigarette is supplied with about 10.2mg tar/every cigarette.
Example 9: the cigarette of implementing the representative of 1-6 uses the smoking of a Borgwalt RM-20 smoking machine to docking the about 4mm of length by end.Following program is to be listed by FTC, discharges the smoke components of the filter end of every cigarette and advances by a Cambridge filter pad liner, and vapour phase is collected in the sack, and analyzes with GC/MC.These data normally are about 10mg tar/every cigarette.
Average vapour phase output capacity (every cigarette of mg/)
| Press the cigarette that example is prepared | 12 | 34 | 56 |
| Every cigarette of mg Dudite/ | 40 | 20 | 60 |
| The order of filter tip section | CA/GA CA/SA SA GA | CA/GA CA/SA SA GA | CA/GA CA/SA SA GA |
| Acetaldehyde | 330.9 333.7 | 380.7 346.2 | 320.3 310.9 |
| Isoprene | 231.4 240.4 | 252.1 246.1 | 227.4 227.2 |
| Acetone | 144.1 163.5 | 156.0 160.5 | 148.0 151.4 |
| Methyl alcohol | 104.9 127.6 | 114.5 142.8 | 111.7 98.5 |
| Acetonitrile | 59.8 72.0 | 67.0 77.4 | 62.8 57.3 |
| Methacrylaldehyde | 29.6 31.4 | 33.6 32.2 | 28.5 29.9 |
| Methyl ethyl ketone | 29.3 35.9 | 30.9 38.5 | 30.1 31.6 |
| Formaldehyde | 23.5 25.8 | 25.5 25.0 | 22.1 24.5 |
| Propionic aldehyde | 25.7 27.4 | 29.3 28.5 | 25.3 25.0 |
| 1,3 butadiene | 25.5 25.9 | 27.5 25.5 | 25.8 25.0 |
| Toluene | 22.5 25.3 | 22.0 27.5 | 23.9 22.5 |
| Benzene | 20.6 23.6 | 21.6 24.1 | 21.1 21.4 |
| Acetonitrile | 16.8 17.7 | 18.0 18.0 | 17.0 16.5 |
| Furans | 16.2 17.0 | 17.3 16.4 | 16.4 16.2 |
| Hydrogen cyanide | 15.1 16.4 | 20.7 19.6 | 13.6 14.8 |
| Hydrogen sulfide | 12.9 13.0 | 14.0 12.9 | 13.1 12.7 |
| Acrylonitrile | 12.9 15.0 | 13.5 15.9 | 13.6 12.8 |
| 2 methyl propanal | 6.4 6.7 | 7.0 7.0 | 6.6 6.4 |
| Crotonaldehyde | 5.1 5.9 | 5.5 6.3 | 5.3 5.0 |
| Carbon disulfide | 2.5 2.6 | 2.7 2.6 | 2.6 2.5 |
| Styrene | 2.0 1.8 | 2.2 1.9 | 2.1 1.7 |
| Pyridine | 1.9 1.9 | 1.9 1.8 | 1.9 1.8 |
The CA=cellulose acetate filters stopper; The sorbent segment that GA=is general; The sorbent segment that SA=selects.
Example 10: the cigarette of example 7 and 8 representative uses the smoking of a BorgwaltRM-20 smoking machine to docking the about 4mm of length by end.Following program is to be listed by FTC, discharges the smoke components of the filter end of every cigarette and advances by a Cambridge filterPad liner, and vapour phase is collected in the sack, and analyzes with GC/MC.These data normally are about 10mg tar/every cigarette.
Average every cigarette of vapour phase output capacity Mg/
The CA=cellulose acetate filters stopper; The sorbent segment that GA=is general; The sorbent segment that SA=selects
See by the viewpoint of producing, disperse the sorbent material 146 of selection and general sorbing material 144 in whole filter tow 142, to have some advantages, especially when adsorbent 144,146 is dispersed in the filter tow 142, adsorbent is easy to processing during for loose granule than them.Yet, when adsorbent 144,146th, when being dispersed in the filter tow 142, a danger is arranged here, use any plasticizer on bundle 142 will influence the surface of adsorbent 144,146, thereby reduce its adsorption capacity.Therefore, as shown in Figure 4, adsorbent 144,146 can be packaged in and filter in the stopper material 142, as the thin layer section of general adsorbent 344 with the adsorbent of selecting 346.
Be not exposed under the identical level of plasticizer the adsorbent that bundle disperses because the adsorbent of packing can not resemble, adsorbent will keep the surface area and the smoke components interaction of bigger practicality.
Read the above, those skilled in the art should be able to manage characteristics change of the present invention.For example, filter stopper, the general sorbent segment and the sorbent segment of selection can and change length and diameter each other with respect to specific virtually any size here.Moreover the size of different sections can be for a kind of specific pipe tobacco compound or dimensionally-optimised for specific tobacco rod.The change of these and other is be sure of should be included in the spirit and scope of the appended claims.
Claims (13)
1. the cigarette filter of a multistage, it comprises:
(a) the filtration stopper of a fiber;
(b) one is placed in abutting connection with the sorbent segment of the selection of the tobacco rod of cigarette, it contains a kind of for the ion exchange resin of phenolic resin as matrix resin, this ion exchange resin is to use first surface-functionalized with amine groups secondary, this ion exchange resin has a surface area, and this area guarantees that enough the surface action position can easily reach for smoke components; And
(c) general sorbent segment, contain a kind of general sorbent material, be selected from the material in following group, this group comprises active charcoal, active cocoanut shell carbon, active coal-based carbon, zeolite, silica dioxide gel, sepiolite, aluminium oxide, the coal-based charcoal of making by semianthractie, by the resin of the styrene-carbon containing that the divinylbenzene pyrolysis is derived of sulfonation, or the combination of these materials, above-mentioned general sorbent segment is positioned between the sorbent segment of the filtration stopper of above-mentioned fiber and above-mentioned selection, the filtration stopper of described fiber, the sorbent segment of described selection and described general sorbent segment are arranged in series coaxially.
2. according to the cigarette filter of claim 1, it is characterized in that the sorbent segment of above-mentioned selection contains above-mentioned ion exchange resin and is dispersed in whole a kind of fibrous material.
3. according to the cigarette filter of claim 1, it is characterized in that the sorbent segment of above-mentioned selection contains the liner of a close packing of above-mentioned ion exchange resin.
4. according to the cigarette filter of claim 1, it is characterized in that above-mentioned general sorbent segment contains above-mentioned general sorbent material, this material spreads in a kind of fibrous material.
5. according to the cigarette filter of claim 4, it is characterized in that above-mentioned general sorbent segment also comprises a kind of additive, be selected from a kind of metal oxide or other Metal Substrate compound.
6. according to the cigarette filter of claim 1, it is characterized in that above-mentioned general sorbent segment contains the liner of a close packing of above-mentioned general sorbing material.
7. according to the cigarette filter of claim 6, it is characterized in that above-mentioned general sorbent segment also comprises a kind of additive, this additive is selected from a kind of metal oxide.
8. according to the cigarette filter of claim 1, it is characterized in that the stopper of above-mentioned filtration also comprises a kind of plasticizer, a kind of liquid additive, a kind of aromatic or their a kind of combination.
9. according to the cigarette filter of claim 1, it is characterized in that the sorbent material of above-mentioned selection has one greater than 35m
2The surface area of/g.
10. according to the cigarette filter of claim 1, it is characterized in that the filtration stopper of described fiber is made by acetate tow.
11. the cigarette filter according to claim 1 is characterized in that, the filtration stopper of described fiber is made by the material in the group that is selected from the combination that comprises cellulose, paper, cotton, polypropylene net, polypropylene bundle, polyester webs, polyester bundle or these materials.
12. the cigarette filter according to claim 1 is characterized in that, the filtration stopper of described fiber is made by the combination of acetate tow and paper, cotton, polypropylene net, polypropylene bundle, polyester webs or polyester bundle.
13. the cigarette filter according to claim 6 is characterized in that, above-mentioned general sorbent segment also comprises a kind of additive, and this additive is selected from a kind of Metal Substrate compound.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US30943501P | 2001-08-01 | 2001-08-01 | |
| US30938801P | 2001-08-01 | 2001-08-01 | |
| US60/309,388 | 2001-08-01 | ||
| US60/309,435 | 2001-08-01 | ||
| US10/011,841 | 2001-10-30 | ||
| US10/011,841 US20030066539A1 (en) | 2001-08-01 | 2001-10-30 | Cigarette Filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1553777A CN1553777A (en) | 2004-12-08 |
| CN100496312C true CN100496312C (en) | 2009-06-10 |
Family
ID=27359516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB028176693A Expired - Fee Related CN100496312C (en) | 2001-08-01 | 2002-07-30 | Cigarette filter |
Country Status (27)
| Country | Link |
|---|---|
| US (2) | US20030066539A1 (en) |
| EP (1) | EP1411784B8 (en) |
| JP (1) | JP4028483B2 (en) |
| KR (1) | KR100838207B1 (en) |
| CN (1) | CN100496312C (en) |
| AP (1) | AP2134A (en) |
| AR (1) | AR034967A1 (en) |
| AT (1) | ATE527901T1 (en) |
| AU (1) | AU2002322811B2 (en) |
| BR (1) | BR0211853B1 (en) |
| CA (1) | CA2454820C (en) |
| EA (1) | EA005323B1 (en) |
| EG (1) | EG23137A (en) |
| ES (1) | ES2375106T3 (en) |
| HR (1) | HRP20040166B1 (en) |
| HU (1) | HUP0401565A3 (en) |
| IL (2) | IL160150A0 (en) |
| MX (1) | MXPA04001044A (en) |
| MY (1) | MY128508A (en) |
| NO (1) | NO20040452L (en) |
| NZ (1) | NZ531256A (en) |
| OA (1) | OA12647A (en) |
| PL (1) | PL200589B1 (en) |
| RS (1) | RS51032B (en) |
| TW (1) | TWI239237B (en) |
| WO (1) | WO2003015544A1 (en) |
| ZA (1) | ZA200401077B (en) |
Families Citing this family (63)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1408780A2 (en) * | 2000-11-10 | 2004-04-21 | Vector Tobacco Ltd. | Method and product for removing carcinogens from tobacco smoke |
| GB0209690D0 (en) * | 2002-04-27 | 2002-06-05 | British American Tobacco Co | Improvements relating to smoking articles and smokable filler materials therefor |
| US6863074B2 (en) * | 2002-08-30 | 2005-03-08 | Philip Morris Usa Inc. | Cigarette filters comprising unfunctionalized porous polyaromatic resins for removing gas phase constituents from mainstream tobacco smoke |
| US20040231684A1 (en) * | 2003-05-20 | 2004-11-25 | Zawadzki Michael A. | Smoking article and smoking article filter |
| US8066011B2 (en) | 2003-09-30 | 2011-11-29 | R. J. Reynolds Tobacco Company | Filtered cigarette incorporating an adsorbent material |
| EP2213185B1 (en) * | 2003-09-30 | 2011-11-09 | R.J. Reynolds Tobacco Company | Filtered cigarette incorporating an adsorbent material |
| US7856990B2 (en) * | 2003-09-30 | 2010-12-28 | R. J. Reynolds Tobacco Company | Filtered cigarette incorporating an adsorbent material |
| US7669604B2 (en) * | 2003-09-30 | 2010-03-02 | R.J. Reynolds Tobacco Company | Filtered cigarette incorporating an adsorbent material |
| KR100617983B1 (en) * | 2005-01-07 | 2006-08-31 | 주식회사 케이티앤지 | Cigarette Filter |
| DE102005005175A1 (en) | 2005-02-01 | 2006-08-10 | Reemtsma Cigarettenfabriken Gmbh | Filter cigarette |
| US10188140B2 (en) | 2005-08-01 | 2019-01-29 | R.J. Reynolds Tobacco Company | Smoking article |
| US20070215167A1 (en) | 2006-03-16 | 2007-09-20 | Evon Llewellyn Crooks | Smoking article |
| US8053483B2 (en) | 2005-08-10 | 2011-11-08 | Mitsubishi Chemical Corporation | Gas adsorbent |
| US7479098B2 (en) | 2005-09-23 | 2009-01-20 | R. J. Reynolds Tobacco Company | Equipment for insertion of objects into smoking articles |
| WO2007104908A1 (en) | 2006-03-10 | 2007-09-20 | British American Tobacco (Investments) Limited | Smoking article filter |
| US9220301B2 (en) | 2006-03-16 | 2015-12-29 | R.J. Reynolds Tobacco Company | Smoking article |
| PL1958523T3 (en) * | 2006-08-04 | 2012-09-28 | Philip Morris Products Sa | Multi-component filter providing multiple flavour enhancement |
| US8739802B2 (en) | 2006-10-02 | 2014-06-03 | R.J. Reynolds Tobacco Company | Filtered cigarette |
| AR063873A1 (en) * | 2006-12-07 | 2009-02-25 | British American Tobacco Co | MOLECULARLY SELECTIVE PRINTED POLYMERS FOR NITROSAMINES SPECIFIC TOBACCO AND METHODS FOR USE |
| US8235056B2 (en) * | 2006-12-29 | 2012-08-07 | Philip Morris Usa Inc. | Smoking article with concentric hollow core in tobacco rod and capsule containing flavorant and aerosol forming agents in the filter system |
| US20080173320A1 (en) * | 2007-01-19 | 2008-07-24 | R. J. Reynolds Tobacco Company | Filtered Smoking Articles |
| US8186360B2 (en) * | 2007-04-04 | 2012-05-29 | R.J. Reynolds Tobacco Company | Cigarette comprising dark air-cured tobacco |
| US7972254B2 (en) | 2007-06-11 | 2011-07-05 | R.J. Reynolds Tobacco Company | Apparatus for inserting objects into a filter component of a smoking article, and associated method |
| EP2211645A4 (en) * | 2007-09-28 | 2013-01-16 | Vector Tobacco Inc | Reduced risk tobacco products and use thereof |
| US20100206317A1 (en) * | 2007-09-28 | 2010-08-19 | Vector Tobacco, Inc. | Reduced risk tobacco products and use thereof |
| MY150067A (en) * | 2007-12-14 | 2013-11-29 | Japan Tobacco Inc | Cigarette filter and filter-tipped cigarette |
| CN101194755B (en) * | 2007-12-21 | 2010-09-29 | 湖南中烟工业有限责任公司 | Additive agent selectively reducing aldehydes matter in cigarette flue gas, production method and application thereof |
| US8613284B2 (en) * | 2008-05-21 | 2013-12-24 | R.J. Reynolds Tobacco Company | Cigarette filter comprising a degradable fiber |
| US8079369B2 (en) | 2008-05-21 | 2011-12-20 | R.J. Reynolds Tobacco Company | Method of forming a cigarette filter rod member |
| EP2323506B2 (en) | 2008-05-21 | 2016-07-27 | R.J.Reynolds Tobacco Company | Apparatus and associated method for forming a filter component of a smoking article and smoking articles made therefrom |
| US8375958B2 (en) * | 2008-05-21 | 2013-02-19 | R.J. Reynolds Tobacco Company | Cigarette filter comprising a carbonaceous fiber |
| US8511319B2 (en) * | 2008-11-20 | 2013-08-20 | R. J. Reynolds Tobacco Company | Adsorbent material impregnated with metal oxide component |
| US8119555B2 (en) * | 2008-11-20 | 2012-02-21 | R. J. Reynolds Tobacco Company | Carbonaceous material having modified pore structure |
| US20100206319A1 (en) * | 2009-02-16 | 2010-08-19 | Gregg Gorski | Personal smoke filter or smoke trap |
| WO2010101918A1 (en) * | 2009-03-02 | 2010-09-10 | Tersus, Llc | Filtration agents and methods of use thereof |
| US8434498B2 (en) | 2009-08-11 | 2013-05-07 | R. J. Reynolds Tobacco Company | Degradable filter element |
| US20110271968A1 (en) | 2010-05-07 | 2011-11-10 | Carolyn Rierson Carpenter | Filtered Cigarette With Modifiable Sensory Characteristics |
| US20120000481A1 (en) | 2010-06-30 | 2012-01-05 | Dennis Potter | Degradable filter element for smoking article |
| US8720450B2 (en) | 2010-07-30 | 2014-05-13 | R.J. Reynolds Tobacco Company | Filter element comprising multifunctional fibrous smoke-altering material |
| CN102008125B (en) * | 2010-11-14 | 2013-04-17 | 中国烟草总公司郑州烟草研究院 | Metal complexing material and preparation method thereof, and application of metal complexing material in cigarettes |
| US8973588B2 (en) | 2011-07-29 | 2015-03-10 | R.J. Reynolds Tobacco Company | Plasticizer composition for degradable polyester filter tow |
| US20130167849A1 (en) | 2011-12-28 | 2013-07-04 | Balager Ademe | Method of tipping for smoking article |
| US20130167851A1 (en) | 2011-12-28 | 2013-07-04 | Balager Ademe | Method of filter assembly for smoking article |
| GB201207211D0 (en) * | 2012-04-25 | 2012-06-06 | British American Tobacco Co | Smoking articles |
| GB2503644A (en) * | 2012-05-03 | 2014-01-08 | British American Tobacco Co | Filter |
| CN103462221B (en) * | 2013-05-30 | 2015-04-22 | 贵州中烟工业有限责任公司 | Cigarette filter containing adsorption filtration layer and application thereof |
| CN103462220B (en) * | 2013-05-30 | 2015-03-25 | 贵州中烟工业有限责任公司 | Cigarette filter containing ultralong TiO2 aquo-complex nanotube, TiO2 nanometer powder and activated carbon fiber |
| CN103462222B (en) * | 2013-05-30 | 2015-08-19 | 贵州中烟工业有限责任公司 | A kind of containing overlength TiO 2hydrate nanometer pipe and TiO 2the cigarette filter of nano powder |
| EP2901871A1 (en) * | 2014-01-31 | 2015-08-05 | Philip Morris Products S.A. | Multi-segment filter tube |
| GB201405657D0 (en) | 2014-03-28 | 2014-05-14 | British American Tobacco Co | Additive carrying composition |
| GB201412752D0 (en) | 2014-07-17 | 2014-09-03 | Nicoventures Holdings Ltd | Electronic vapour provision system |
| US20160073686A1 (en) | 2014-09-12 | 2016-03-17 | R.J. Reynolds Tobacco Company | Tobacco-derived filter element |
| CN104558371B (en) * | 2015-01-28 | 2016-06-01 | 云南中烟工业有限责任公司 | The efficient adsorbing bar of filter tip of a kind of polyacrylic acid aerogel and its preparation method |
| US10028528B2 (en) | 2015-06-01 | 2018-07-24 | Antonino M. Pero | Exhalation smoke filter mask |
| WO2017132709A1 (en) * | 2016-02-05 | 2017-08-10 | "SPS CIGARONNE" Co. Ltd. | Filter cigarette |
| US10226066B2 (en) | 2016-03-07 | 2019-03-12 | R.J. Reynolds Tobacco Company | Rosemary in a tobacco blend |
| US10383369B2 (en) * | 2017-06-07 | 2019-08-20 | Rai Strategic Holdings, Inc. | Fibrous filtration material for electronic smoking article |
| US10512286B2 (en) | 2017-10-19 | 2019-12-24 | Rai Strategic Holdings, Inc. | Colorimetric aerosol and gas detection for aerosol delivery device |
| ES2717550B2 (en) * | 2017-12-21 | 2020-02-28 | Univ Alicante | COMBINED FILTER FOR THE ELIMINATION OF TARS AND TOXIC COMPOUNDS OF TOBACCO SMOKE |
| CN110250567A (en) * | 2019-05-08 | 2019-09-20 | 中山市博海精细化工有限公司 | A kind of environment-friendly cigarette filter tip filler and preparation method |
| US11291242B2 (en) | 2019-08-28 | 2022-04-05 | Aiger Group Ag | Apparatus and method for forming a smoke filter |
| KR102373179B1 (en) * | 2020-03-05 | 2022-03-11 | 조영상 | Cigarette filter for toxic gas decomposition |
| CN113287784B (en) * | 2021-06-25 | 2022-09-30 | 云南中烟工业有限责任公司 | Cigarette filter particles capable of reducing release amount of hydrogen sulfide in smoke, preparation method and filter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2185760A (en) * | 1933-03-10 | 1940-01-02 | Altenkirch Edmund | Drying method and apparatus |
| US3716500A (en) * | 1970-09-25 | 1973-02-13 | Brown & Williamson Tobacco | Tobacco smoke filter material |
| US4033361A (en) * | 1974-06-17 | 1977-07-05 | Brown & Williamson Tobacco Corporation | Tobacco-smoke filters |
| US4700723A (en) * | 1983-03-10 | 1987-10-20 | Toray Industries, Inc. | Tobacco filter and fibrous ion exchange resin |
| EP0754663A1 (en) * | 1995-07-20 | 1997-01-22 | Rohm And Haas Company | Method for producing efflorescence resistant coating on cementitious substrate |
Family Cites Families (37)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2815760A (en) * | 1951-12-24 | 1957-12-10 | Schreus Hans Theo | Tobacco smoke filter |
| US2915069A (en) * | 1954-07-13 | 1959-12-01 | Olin Mathieson | Smoking device |
| CH399981A (en) * | 1960-06-30 | 1965-09-30 | Jacob Van Buuren Arend | Tobacco smoke filters |
| US3266973A (en) * | 1963-07-25 | 1966-08-16 | Richard P Crowley | Method of preparing adsorbent filter paper containing crystalline zeolite particles, and paper thereof |
| US3280823A (en) * | 1963-10-01 | 1966-10-25 | Philip Morris Inc | Additive-releasing filter for releasing additives into tobacco smoke |
| BE647803A (en) * | 1964-05-12 | 1964-11-12 | ||
| US3658069A (en) * | 1970-02-17 | 1972-04-25 | Stanford Research Inst | Filter for reducing the level of carbon monoxide in tobacco smoke |
| US3841338A (en) * | 1970-07-23 | 1974-10-15 | British American Tobacco Co | Tobacco-smoke filters |
| US3828800A (en) * | 1970-09-25 | 1974-08-13 | Brown & Williamson Tobacco | Tobacco smoke filter material |
| GB1373388A (en) * | 1970-12-24 | 1974-11-13 | Teijin Ltd | Thermoplastic polymer fibres |
| US3960770A (en) * | 1973-08-03 | 1976-06-01 | The Dow Chemical Company | Process for preparing macroporous open-cell carbon foam from normally crystalline vinylidene chloride polymer |
| US4003257A (en) * | 1974-03-12 | 1977-01-18 | Nasa | Analysis of volatile organic compounds |
| US4063912A (en) * | 1975-02-18 | 1977-12-20 | Rohm And Haas Company | Gaseous phase adsorption using partially pyrolyzed polymer particles |
| GB1584773A (en) * | 1976-08-02 | 1981-02-18 | Wiggins Teape Ltd | Moulded fibrous materials |
| JPS5388400A (en) * | 1977-01-13 | 1978-08-03 | Toho Rayon Co Ltd | Cigarette filter |
| US4246910A (en) * | 1977-08-01 | 1981-01-27 | Philip Morris Incorporated | Cigarette filter material comprising compounds of iron in high oxidation states |
| US4266561A (en) * | 1978-04-10 | 1981-05-12 | Brown & Williamson Tobacco Corporation | Tobacco smoke filtering compositions |
| ZA792187B (en) * | 1978-05-16 | 1980-05-28 | British American Tobacco Co | Tobacco smoke filters |
| FR2524818A1 (en) * | 1982-04-09 | 1983-10-14 | Raffinage Cie Francaise | NOVEL OXIDATION CATALYST OF MERCAPTANS IN DISULFIDE, PROCESS FOR PREPARING THE SAME AND APPLICATION TO SOFTENING PETROLEUM DISTILLATES |
| US4438196A (en) * | 1982-09-28 | 1984-03-20 | Miles Laboratories, Inc. | Immobilization of biocatalysts on granular carbon |
| US4531953A (en) * | 1983-06-21 | 1985-07-30 | Calgon Corporation | Sublimation of amine compounds on activated carbon pore surfaces |
| US5104530A (en) * | 1988-01-29 | 1992-04-14 | Maroldo Stephen G | Chromatography column with carbonaceous adsorbents from pyrolyzed polysulfonated polymers |
| US5271419A (en) * | 1989-09-29 | 1993-12-21 | R. J. Reynolds Tobacco Company | Cigarette |
| HU201865B (en) * | 1989-04-28 | 1991-01-28 | Pecsi Dohanygyar | Tobacco-smoke filter of high efficiency |
| CA2078223A1 (en) * | 1991-02-01 | 1992-08-02 | Krishnamurthy Nagasubramanian Mani | Separation/recovery of ammonium salts via electrodialytic water splitting |
| US5271780A (en) * | 1991-12-30 | 1993-12-21 | Kem-Wove, Incorporated | Adsorbent textile product and process |
| DE4205658A1 (en) * | 1992-02-25 | 1993-08-26 | Reemtsma H F & Ph | VENTILATED FILTER CIGARETTE |
| RU2010545C1 (en) * | 1992-04-22 | 1994-04-15 | Товарищество с ограниченной ответственностью "Сфинкс" | Cigarette filter |
| US5281257A (en) * | 1992-12-11 | 1994-01-25 | Purus Inc. | System for increasing efficiency of vapor phase pollutant removal with on-site regeneration and pollutant recovery |
| US5385876A (en) * | 1993-01-27 | 1995-01-31 | Syracuse University | Activated carbons molecularly engineered |
| US5319114A (en) * | 1993-09-23 | 1994-06-07 | Arco Chemical Technology, L. P. | Olefin epoxidation using a carbon molecular sieve impregnated with a transition metal |
| DE4343920A1 (en) * | 1993-12-22 | 1995-06-29 | Hoechst Ag | Filters to remove nitrogen oxides from tobacco smoke |
| AU6492696A (en) * | 1995-07-14 | 1997-02-18 | U.S. Environmental Protection Agency | Absorbent filled membranes for removal of volatile compounds from wastewater |
| US6119699A (en) * | 1997-12-19 | 2000-09-19 | Sung; Michael T. | Method and apparatus for the selective removal of specific components from smoke condensates |
| US6257242B1 (en) * | 1999-10-18 | 2001-07-10 | Ioannis C. Stavridis | Filter element |
| MY128157A (en) * | 2000-04-20 | 2007-01-31 | Philip Morris Prod | High efficiency cigarette filters having shaped micro cavity fibers impregnated with adsorbent or absorbent materials |
| US6779529B2 (en) * | 2001-08-01 | 2004-08-24 | Brown & Williamson Tobacco Corporation | Cigarette filter |
-
2001
- 2001-10-30 US US10/011,841 patent/US20030066539A1/en not_active Abandoned
-
2002
- 2002-07-30 EP EP02756831A patent/EP1411784B8/en not_active Expired - Lifetime
- 2002-07-30 CA CA002454820A patent/CA2454820C/en not_active Expired - Fee Related
- 2002-07-30 EA EA200400191A patent/EA005323B1/en not_active IP Right Cessation
- 2002-07-30 TW TW091117045A patent/TWI239237B/en not_active IP Right Cessation
- 2002-07-30 AP APAP/P/2004/002985A patent/AP2134A/en active
- 2002-07-30 AT AT02756831T patent/ATE527901T1/en not_active IP Right Cessation
- 2002-07-30 CN CNB028176693A patent/CN100496312C/en not_active Expired - Fee Related
- 2002-07-30 ES ES02756831T patent/ES2375106T3/en not_active Expired - Lifetime
- 2002-07-30 OA OA1200400032A patent/OA12647A/en unknown
- 2002-07-30 AU AU2002322811A patent/AU2002322811B2/en not_active Ceased
- 2002-07-30 MX MXPA04001044A patent/MXPA04001044A/en active IP Right Grant
- 2002-07-30 KR KR1020047001625A patent/KR100838207B1/en not_active IP Right Cessation
- 2002-07-30 NZ NZ531256A patent/NZ531256A/en not_active IP Right Cessation
- 2002-07-30 JP JP2003520314A patent/JP4028483B2/en not_active Expired - Fee Related
- 2002-07-30 WO PCT/US2002/024240 patent/WO2003015544A1/en active IP Right Grant
- 2002-07-30 HU HU0401565A patent/HUP0401565A3/en unknown
- 2002-07-30 US US10/485,479 patent/US20040237984A1/en not_active Abandoned
- 2002-07-30 PL PL368136A patent/PL200589B1/en not_active IP Right Cessation
- 2002-07-30 BR BRPI0211853-0A patent/BR0211853B1/en not_active IP Right Cessation
- 2002-07-30 RS YUP-112/04A patent/RS51032B/en unknown
- 2002-07-30 IL IL16015002A patent/IL160150A0/en active IP Right Grant
- 2002-07-31 MY MYPI20022886A patent/MY128508A/en unknown
- 2002-08-01 AR ARP020102923A patent/AR034967A1/en active IP Right Grant
- 2002-08-03 EG EG2002080870A patent/EG23137A/en active
-
2004
- 2004-02-01 IL IL160150A patent/IL160150A/en not_active IP Right Cessation
- 2004-02-02 NO NO20040452A patent/NO20040452L/en not_active Application Discontinuation
- 2004-02-10 ZA ZA2004/01077A patent/ZA200401077B/en unknown
- 2004-02-19 HR HRP20040166AA patent/HRP20040166B1/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2185760A (en) * | 1933-03-10 | 1940-01-02 | Altenkirch Edmund | Drying method and apparatus |
| US3716500A (en) * | 1970-09-25 | 1973-02-13 | Brown & Williamson Tobacco | Tobacco smoke filter material |
| US4033361A (en) * | 1974-06-17 | 1977-07-05 | Brown & Williamson Tobacco Corporation | Tobacco-smoke filters |
| US4700723A (en) * | 1983-03-10 | 1987-10-20 | Toray Industries, Inc. | Tobacco filter and fibrous ion exchange resin |
| EP0754663A1 (en) * | 1995-07-20 | 1997-01-22 | Rohm And Haas Company | Method for producing efflorescence resistant coating on cementitious substrate |
Also Published As
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100496312C (en) | Cigarette filter | |
| US6779529B2 (en) | Cigarette filter | |
| AU2002322811A1 (en) | Cigarette filter | |
| EP3169171B1 (en) | Electronic vapour provision system | |
| EP2096945B1 (en) | Smoking article filter | |
| US4033361A (en) | Tobacco-smoke filters | |
| US2754829A (en) | Smoke filter | |
| US20120247491A1 (en) | Smoking articles comprising copper-exchanged molecular sieves | |
| RU2291657C2 (en) | Smoking filter and smoking article | |
| US4266561A (en) | Tobacco smoke filtering compositions | |
| US20030098030A1 (en) | Cigarette filter | |
| RU2357624C2 (en) | Tobacco smoke filter | |
| JP3905883B2 (en) | Cigarette filter | |
| JPWO2003013287A1 (en) | Cigarette filter | |
| JPH02308784A (en) | Filter for tobacco |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090610 Termination date: 20140730 |
|
| EXPY | Termination of patent right or utility model |