US3802441A - Tobacco smoke filter additive - Google Patents

Tobacco smoke filter additive Download PDF

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Publication number
US3802441A
US3802441A US00220743A US22074372A US3802441A US 3802441 A US3802441 A US 3802441A US 00220743 A US00220743 A US 00220743A US 22074372 A US22074372 A US 22074372A US 3802441 A US3802441 A US 3802441A
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US
United States
Prior art keywords
zinc oxide
mixture
filter
plasticizer
carbonate
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 - Lifetime
Application number
US00220743A
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English (en)
Inventor
J Hammersmith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brown and Williamson Holdings Inc
Original Assignee
Brown and Williamson Tobacco Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Brown and Williamson Tobacco Corp filed Critical Brown and Williamson Tobacco Corp
Priority to US00220743A priority Critical patent/US3802441A/en
Priority to GB4161672A priority patent/GB1400197A/en
Priority to ZA728844A priority patent/ZA728844B/xx
Priority to AU50149/72A priority patent/AU463557B2/en
Priority to CA159,407A priority patent/CA959369A/en
Priority to DE19722263178 priority patent/DE2263178C3/de
Priority to FI3664/72A priority patent/FI55604C/fi
Priority to DK3973AA priority patent/DK130764B/da
Priority to CH80073A priority patent/CH573719A5/xx
Priority to BE794461A priority patent/BE794461A/xx
Priority to NL7301195A priority patent/NL167845C/xx
Application granted granted Critical
Publication of US3802441A publication Critical patent/US3802441A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28033—Membrane, sheet, cloth, pad, lamellar or mat
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28023—Fibres or filaments

Definitions

  • a cigarette or other tobacco smoke filter which has a filamentary or fibrous cellulose acetate support carrying a stabilized mixture of zinc oxide and an alkali carbonate salt.
  • the zinc oxide and the carbonate salt are dispersed in a plasticizer to form the stabilized mixture by a milling operation.
  • the invention is directed to improvements relating to filters for tobacco smoke.
  • the filters are intended for use attached either to' cigarettes, cigars, or cigarillos, or as a separate cartridge filter for pipes, cigarettes, or cigar holders. Further, the filters may be employed attached to smoking articles formed from reconstituted tobacco.
  • tobacco smoke consists of a gaseous or vapor phase in which are suspended liquid or semi-liquid droplets or solid particles, which form the visible smoke stream.
  • Conventional cigarette filters are formed from cellulosic fibers or convoluted creped paper formed into a cylindrical plug to remove varying proportions of the droplets passing therethrough. For the most part, they do not effectively remove gaseous molecules.
  • Such gaseous molecules including hydrogen cyanide and hydrogen sulfide can be considered as gases or highly volatile liquids. ln the brief period of time in which they are carried from the tobacco combustion zone to the smokers mouth, there is relatively little time for the gases to condense into droplets. Consequently, these materials are almost entirely found in the vaporized state as they leave the smoking article and enter the smokers mouth.
  • the smooth and generally non-porous nature of commonly used fibrous filtering materials may capture tobacco smoke droplets, but do not present a sufficient surface area to effectively adsorb gaseous molecules.
  • a primary object of the present invention to provide an improved filter additive adapted to be combined with a filter material for removing substantial quantities of volatile constituents, particularly hydrogen cyanide and hydrogen sulfide from the smoke of burning tobacco.
  • a tobacco smoke filter comprising a support or carrier of fibrous, filamentary or sheet filtering material, carrying a mixture comprising zinc oxide and a carbonate salt selected from the group consisting of sodium carbonate, potassium carbonate or mixtures thereof.
  • a carbonate salt selected from the group consisting of sodium carbonate, potassium carbonate or mixtures thereof.
  • Such filter may be connected at one end to an outer wrapper having a charge of tobacco therein.
  • To produce the filter a stable suspension of zinc oxide, sodium or potassium carbonate and a liquid plasticizer is formed and the suspension is thereafter sprayed on the filter support.
  • FIG. 1 is a graph illustrating the unexpected selective filtration property with respect to hydrogen cyanide, of the filter of the invention
  • FIG. 2 is a graph depicting the unexpected selective filtration characteristic with respect to hydrogen sulfide, of the filter of the invention.
  • FIG. 3 is a graph illustrating the unexpected selective filtration properties with respect to hydrogen cyanide of the improved filter material as compared to expected efficiencies for predetermined loadings of additive.
  • the tobacco smoke filter of the invention is produced by treating a tobacco smoke filtering material formed from, for example, fibrous, filamentary or sheet material with a mixture of zinc oxide and either sodium carbonate, potassium carbonate or mixtures thereof.
  • a tobacco smoke filtering material formed from, for example, fibrous, filamentary or sheet material with a mixture of zinc oxide and either sodium carbonate, potassium carbonate or mixtures thereof.
  • a stable suspension of the mixture is formed.
  • the stable suspension is formed by intimately combining, with agitation, zinc oxide and sodium carbonate solids and a liquid plasticizer.
  • liquid plasticizers may be employed such as: triethylene glycol diacetate, triethylene citrate, triacetin, and glycerol derivatives.
  • the concentration of solids in the dispersed plasticizer is from about lOto 40 per cent of the combined weight of the solids and plasticizer.
  • the additive solids and liquid plasticizer are introduced into a ball mill, and milled for a sufficient period of time to form a sprayable dispersion stable for at least four to five days.
  • the milling step is carried on for at least about 16 hours to insure that a sufficiently reduced solids particle size is obtained.
  • the stable additive plasticizer dispersion permits both deposition of the additive on tobacco smoke filter material, such as conventional cellulose acetate tow, and also simultaneous addition of a plasticizer to the tow, which causes a fiber-to-fiber bond to form.
  • tobacco smoke filter material such as conventional cellulose acetate tow
  • plasticizer to the tow
  • organic water-soluble zinc acetate and sodium acetate salts were added to creped paper in an aqueous solution. It is a feature of the present invention that a stable, sprayable dispersion containing a filter additive and a plasticizer is applied to conventional cellulose acetate tow, both to enhance the selective filtration properties of the resulting filter, and also to provide a strengthened and more resilient filter as a result of the plasticizing action of the dispersion.
  • the molar ratio of zinc oxide to sodium and/or potassium carbonate in the additive mixture may be varied widely, nevertheless, the described ranges are deemed to be most practical and efficient.
  • the molar ratio of zinc oxide to sodium and /or potassium carbonate in the filter additive is from about 25:1 to 1:25.
  • Enhanced selective removal characteristics are obtained when the molar ratio of zinc oxide to sodium carbonate is from about 8:1 to 1:5 as is shown by FIG. 3.
  • B Amount of hydrogen cyanide left after acetate filtration.
  • C Amount of hydrogen cyanide left after zinc oxide filtration.
  • D Amount of hydrogen cyanide delivered smoker, after sodium carbonate filtration.
  • E; E;, E] E,,, E E are parameters which account for the fact that what is filtered by one component cannot be removed by the other components.
  • FIG. No. 3 also shows why the molar ratio range of 8:1 to 1:5, zinc oxide to sodium carbonate, is preferred. Obtaining a filter efficiency of percent and more is simple. One merely adds sufficient zinc oxide and sodium carbonate to stay above and right of the 80 percent contour.
  • FIG. 3 shows the greatest separation of the 50 percent and 80 percent contours when the above molar ratios are within 8:] to 1:5.
  • a 1% variation in additive amount or ratio causes relatively small changes in total filter efficiency in the preferred molar ratio range.
  • a 1 percent variation outside the preferred range results in greater variations in efficiency.
  • the preferred molar ratio range allows better control over the 50 percent 80 percent filter efficiency range.
  • sufficient zinc oxide and sodium and/or potassium carbonate are employed in the tobacco smoke filter to provide from about 2 to 25 milligrams (mgs.) of solids mixture per cigarette. It is particularly preferred to employ from about 3 to 10 mgs. of the zinc oxide-sodium carbonate mixture per cigarette. As illustrated in FIG. 3, generally at least about 30 micromoles of additive are preferably employed in a filter section.
  • the above-described, bloomed, tow was then sprayed using a conventional laboratory atomizer with a stable dispersion formed by milling a mixture of 200 grams of zinc oxide, 50 grams sodium carbonate and 550 grams of plasticizer for 24 hours.
  • the molar ratio of zinc oxide to sodium carbonate in the dispersion was 5:1.
  • the plasticizer employed was a mixture of 6 parts by weight triethylene glycol diacetate and 5 parts by weight polyethylene glycol.
  • the sprayed tow was then gathered, and placed into the tobacco cavity of a manual cigarette making machine.
  • the cigarette-maker employed was the revolutionary LAREDO cigarette-maker, described in U.S. Pat. No. 3,491,768 issued Jan. 27, I970.
  • the filter-rod of the invention was fabricated as one would fabricate a cigarette in the LAREDO cigarette-maker.
  • the resulting rods were cured for at least four hours, and thereafter severed into 21 mm. segments.
  • the 21 mm. filters were inserted in the tipping cavity of a standard 84 mm. cigarette.
  • Cigarettes made by the above procedures were smoked mechanically, using a conventional smoking machine which smoked the cigarettes to tipping plus 3 mm., employing FTC procedures.
  • the filters fabricated by the above procedures contained 4 mgs. of zinc oxide and 0.9 mgs. of sodium carbonate.
  • the proportions of hydrogen cyanide and hydrogen sulfide removed from the smoke were determined by standard analytical methods.
  • EXAMPLE II rods were formed into cigarettes, and tested according to the procedure of Example I.
  • the results of the tests are illustrated in the graphs of I FIGS. 1 and 2.
  • the weight per cent of cyanide or sulfide removed [as compared to untreated smoke] is plotted against weight loading in milligrams of zinc oxide and/or sodium carbonate in the filter section.
  • typical removal levels for hydrogen cyanide by zinc oxide range from 23 to 58 per cent, while the removal levels for sodium carbonate range from 48 to 62 per cent.
  • the expected additive effects of a filter section contain ing equal loadings by weight of zinc oxide and sodium carbonate is represented by a median line. Since the Gram Molecular Weight for zinc oxide and sodium carbonate is almost identical, the graph also represents the expected smoke selective removal properties at equimolar concentrations.
  • the actual removal efficiency for the filter additive with respect to hydrogen cyanide was over 30 per cent greater than the expected additive result.
  • the theory behind the synergistic interaction is not presently understood. It is postulated, however, that the more uniform deposition of finely divided additive on the filter section provided by the stable dispersion initially formed is at least partially responsible. However, dusted mixtures of additive have yielded somewhat unexpected selective removal efficiencies also.
  • the actual removal efficiency with respect to hydrogen sulfide is found to be per cent better than that expected by the combination of individual ingredients.
  • EXAMPLE IV A stable dispersion of 73.5 parts plasticizer, 19.8 parts zinc oxide and 6.8 parts potassium carbonate (parts by weight) was formed in accordance with the procedures set forth in Example I.
  • Filters containing 6 mg of zinc oxide and 2 mg of potassium carbonate (molar ratio of 4.4/1) were formed and tested as per Example 1.
  • the removal efficiencies, 73% for HCN and 82% for H S, are comparable to an equivalent zinc oxide/sodium carbonate treated filter.
  • COMPARATIVE EXAMPLE I A stable dispersion of 74.8 parts plasticizer, 20.2 parts zinc oxide and 5.0 parts calcium carbonate was formed and tested as per Example 1. Filters containing 6 mg zinc oxide and 1.6 mg calcium carbonate (molar ratio of 4.6/1 were substantially ineffective for removing hydrogen cyanide or hydrogen sulfide. Selective removal efficiencies for hydrogen cyanide and hydrogen sulfide were 22% and 12% respectively.
  • COMPARATIVE EXAMPLE II A stable dispersion of 74.6 parts plasticizer, 20.3 parts zinc oxide and 5.1 parts magnesium carbonate were formed and tested according to Example 1. Filters containing 6 mg zinc oxide and 1.5 mg of magnesium carbonate (molar ratio of 4.1/1 were not effective for removing hydrogen cyanide or hydrogen sulfide with removal efficiencies of 28% and 2% respectively.
  • An improved tobacco smoke filter comprising a carrier of fibrous or filamentary cellulose acetate on which is supported a stabilized mixture comprising a plasticizer, zinc oxide and a carbonate salt selected from the group consisting of sodium carbonate. potassium carbonate or mixtures thereof; and said molar ratio of zinc oxide to said carbonate salt being from about 25 to l to l to 25, said mixture resulting from the intimate dispersion of said zinc oxide and carbonate salt in said plasticizer by a milling operation.
  • a smoking article comprising a charge of tobacco enrobed in an outer wrapper and a filter connected to one end of said wrapper, wherein said filter comprises a carrier of fibrous or filamentary cellulose acetate on which is supported a stabilized mixture comprising a plasticizer, zinc oxide and a carbonate salt selected from the group consisting of potassium carbonate, sodium carbonate or mixtures thereof, and said molar ratio of said zinc oxide to said carbonate salt being from about 25 to l to l to 25, said mixture resulting from the intimate dispersion of said zinc oxide and carbonate salt in said plasticizer by a milling operation.
  • said mixture comprises from about 90 to 60 percent by weight liquid plasticizer and from about 10 to 40 percent by weight of said mixture of zinc oxide and carbonate salt, said weights based on the combined weight of said mixture and plasticizer.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Filtering Materials (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Treating Waste Gases (AREA)
US00220743A 1972-01-26 1972-01-26 Tobacco smoke filter additive Expired - Lifetime US3802441A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US00220743A US3802441A (en) 1972-01-26 1972-01-26 Tobacco smoke filter additive
GB4161672A GB1400197A (en) 1972-01-26 1972-09-07 Tobacco smoke filter additive
ZA728844A ZA728844B (en) 1972-01-26 1972-12-14 Improved tobacco smoke filter
AU50149/72A AU463557B2 (en) 1972-01-26 1972-12-15 Improved tobacco smoke filter
CA159,407A CA959369A (en) 1972-01-26 1972-12-19 Tobacco smoke filter additive
DE19722263178 DE2263178C3 (de) 1972-01-26 1972-12-22 Tabakrauchfilter
FI3664/72A FI55604C (fi) 1972-01-26 1972-12-28 Filter foer tobaksroek
DK3973AA DK130764B (da) 1972-01-26 1973-01-04 Filter for tobaksrøg.
CH80073A CH573719A5 (US20080094685A1-20080424-C00004.png) 1972-01-26 1973-01-19
BE794461A BE794461A (fr) 1972-01-26 1973-01-24 Filtre ameliore pour la fumee de tabac
NL7301195A NL167845C (nl) 1972-01-26 1973-01-26 Werkwijze voor de vervaardiging van een filter voor tabaksrook, en hiermee voorziene rookartikelen.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00220743A US3802441A (en) 1972-01-26 1972-01-26 Tobacco smoke filter additive

Publications (1)

Publication Number Publication Date
US3802441A true US3802441A (en) 1974-04-09

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US00220743A Expired - Lifetime US3802441A (en) 1972-01-26 1972-01-26 Tobacco smoke filter additive

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US (1) US3802441A (US20080094685A1-20080424-C00004.png)
AU (1) AU463557B2 (US20080094685A1-20080424-C00004.png)
BE (1) BE794461A (US20080094685A1-20080424-C00004.png)
CA (1) CA959369A (US20080094685A1-20080424-C00004.png)
CH (1) CH573719A5 (US20080094685A1-20080424-C00004.png)
DK (1) DK130764B (US20080094685A1-20080424-C00004.png)
FI (1) FI55604C (US20080094685A1-20080424-C00004.png)
GB (1) GB1400197A (US20080094685A1-20080424-C00004.png)
NL (1) NL167845C (US20080094685A1-20080424-C00004.png)
ZA (1) ZA728844B (US20080094685A1-20080424-C00004.png)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030138497A1 (en) * 2000-01-14 2003-07-24 Shiseido Co., Ltd. Inorganic antibacterial/antifungal agents
EP1541044A1 (en) * 2002-09-19 2005-06-15 Japan Tobacco Inc. Filter for cigarette
US20070224134A1 (en) * 2006-03-22 2007-09-27 The Procter & Gamble Company Oral zinc compositions
EP2130444A1 (en) 2008-06-06 2009-12-09 Xavier Wertz Smokable material and smokable articles
US20170342598A1 (en) * 2014-12-11 2017-11-30 Solvay Acetow Gmbh Polymer composition comprising basic additive, process and articles comprising said polymer composition
WO2018033476A1 (en) * 2016-08-17 2018-02-22 Philip Morris Products S.A. Aerosol-generating article having novel tobacco substrate

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4763674A (en) * 1986-04-16 1988-08-16 Hercules Incorporated Method and device for controlling hydrogen cyanide and nitric oxide concentrations in cigarette smoke
EP0250806A3 (en) * 1986-06-30 1988-06-01 Hercules Incorporated Method and device for removing nitric oxide from cigarette smoke
GB201112539D0 (en) 2011-07-21 2011-08-31 British American Tobacco Co Porous carbon and methods of production thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3021242A (en) * 1957-12-16 1962-02-13 Eastman Kodak Co Bonding additives onto filament filters
US3217719A (en) * 1962-04-16 1965-11-16 Lorillard Co P Cigarette filters containing selective adsorbents
US3251365A (en) * 1963-03-04 1966-05-17 Ii Charles H Keith Tobacco smoke filter
US3426763A (en) * 1965-07-21 1969-02-11 Eastman Kodak Co Tobacco smoke filter having a coated carbon additive
US3428055A (en) * 1965-04-09 1969-02-18 Eastman Kodak Co Filter elements and additive therefor
US3550600A (en) * 1967-03-29 1970-12-29 Brown & Williamson Tobacco Cigarette filters
US3618619A (en) * 1970-03-03 1971-11-09 Eastman Kodak Co Tobacco smoke filters

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3021242A (en) * 1957-12-16 1962-02-13 Eastman Kodak Co Bonding additives onto filament filters
US3217719A (en) * 1962-04-16 1965-11-16 Lorillard Co P Cigarette filters containing selective adsorbents
US3251365A (en) * 1963-03-04 1966-05-17 Ii Charles H Keith Tobacco smoke filter
US3428055A (en) * 1965-04-09 1969-02-18 Eastman Kodak Co Filter elements and additive therefor
US3426763A (en) * 1965-07-21 1969-02-11 Eastman Kodak Co Tobacco smoke filter having a coated carbon additive
US3550600A (en) * 1967-03-29 1970-12-29 Brown & Williamson Tobacco Cigarette filters
US3618619A (en) * 1970-03-03 1971-11-09 Eastman Kodak Co Tobacco smoke filters

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030138497A1 (en) * 2000-01-14 2003-07-24 Shiseido Co., Ltd. Inorganic antibacterial/antifungal agents
EP1541044A1 (en) * 2002-09-19 2005-06-15 Japan Tobacco Inc. Filter for cigarette
US20050161054A1 (en) * 2002-09-19 2005-07-28 Japan Tobacco Inc. Cigarette filter
EP1541044A4 (en) * 2002-09-19 2005-11-16 Japan Tobacco Inc CIGARETTE FILTER
US7487782B2 (en) 2002-09-19 2009-02-10 Japan Tobacco Inc. Cigarette filter
US8778311B2 (en) * 2006-03-22 2014-07-15 The Procter & Gamble Company Oral zinc compositions
US20070224134A1 (en) * 2006-03-22 2007-09-27 The Procter & Gamble Company Oral zinc compositions
EP2130444A1 (en) 2008-06-06 2009-12-09 Xavier Wertz Smokable material and smokable articles
US20170342598A1 (en) * 2014-12-11 2017-11-30 Solvay Acetow Gmbh Polymer composition comprising basic additive, process and articles comprising said polymer composition
CN112375259A (zh) * 2014-12-11 2021-02-19 索尔维阿塞托有限公司 包含碱性添加剂的聚合物组合物，方法以及包含所述聚合物组合物的物品
US11352716B2 (en) * 2014-12-11 2022-06-07 Rhodia Acetow Gmbh Polymer composition comprising basic additive, process and articles comprising said polymer composition
CN112375259B (zh) * 2014-12-11 2023-10-03 索尔维阿塞托有限公司 包含碱性添加剂的聚合物组合物，方法以及包含所述聚合物组合物的物品
US11920260B2 (en) 2014-12-11 2024-03-05 Rhodia Acetow Gmbh Polymer composition comprising basic additive, process and articles comprising said polymer composition
WO2018033476A1 (en) * 2016-08-17 2018-02-22 Philip Morris Products S.A. Aerosol-generating article having novel tobacco substrate
US11399563B2 (en) 2016-08-17 2022-08-02 Philip Morris Products S.A. Aerosol-generating article having novel tobacco substrate

Also Published As

Publication number Publication date
DK130764C (US20080094685A1-20080424-C00004.png) 1975-09-15
NL167845B (nl) 1981-09-16
AU5014972A (en) 1974-07-11
DK130764B (da) 1975-04-14
CA959369A (en) 1974-12-17
ZA728844B (en) 1973-10-31
CH573719A5 (US20080094685A1-20080424-C00004.png) 1976-03-31
NL167845C (nl) 1982-02-16
BE794461A (fr) 1973-07-24
GB1400197A (en) 1975-07-16
FI55604C (fi) 1979-09-10
DE2263178B2 (de) 1977-04-28
DE2263178A1 (de) 1973-08-02
NL7301195A (US20080094685A1-20080424-C00004.png) 1973-07-30
FI55604B (fi) 1979-05-31
AU463557B2 (en) 1975-07-31

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