GB1442631A - Cigarette filters - Google Patents

Cigarette filters

Info

Publication number
GB1442631A
GB1442631A GB579973A GB579973A GB1442631A GB 1442631 A GB1442631 A GB 1442631A GB 579973 A GB579973 A GB 579973A GB 579973 A GB579973 A GB 579973A GB 1442631 A GB1442631 A GB 1442631A
Authority
GB
United Kingdom
Prior art keywords
cigarette
smoke
filter
filters
foamed
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
Application number
GB579973A
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.)
Monsanto Ltd
Original Assignee
Monsanto Ltd
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 Monsanto Ltd filed Critical Monsanto Ltd
Priority to GB579973A priority Critical patent/GB1442631A/en
Priority to AU65023/74A priority patent/AU481537B2/en
Priority to DE19742404959 priority patent/DE2404959C3/en
Priority to IT4813274A priority patent/IT1002843B/en
Priority to BE140528A priority patent/BE810576A/en
Priority to JP1485174A priority patent/JPS49109599A/ja
Priority to CA191,788A priority patent/CA1005724A/en
Priority to FR7403753A priority patent/FR2215905B1/fr
Priority to BR83474A priority patent/BR7400834D0/en
Priority to CH166374A priority patent/CH604572A5/xx
Publication of GB1442631A publication Critical patent/GB1442631A/en
Expired legal-status Critical Current

Links

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
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Abstract

1442631 Tobacco-smoke filters MONSANTO Ltd 28 Jan 1974 [6 Feb 1973 22 May 1973 17 Oct 1973] 5799/73 24427/73 and 48375/73 Addition to 1341400 Heading A2C [Also in Division C3] A cigarette filter comprises an extruded element (see Specification 1341400) of a substantially open-cell (i.e. the majority of the cell walls are perforated) foamed thermoplastic high density polyethylene or polypropylene resin having a cross-section corresponding to that of the relevant cigarette and a microstructure such that the filter has a hardness greater than 50%, #P 10 less than 15cm. water gauge and a TPM filtration efficiency greater than 20% (the hardness, #P 10 and TPM efficiency being as defined), the element containing dispersed therein a physiologically acceptable substance (i.e. presents no known health hazard to a smoker of cigarettes comprising these filters) that alters to the required degree the composition of the gaseous phase of cigarette smoke passing through the filter when a cigarette comprising the filter is smoked. The substance may remove or reduce one or more components of the smoke and may be active charcoal or triacetin, or it may add one or more gaseous components to the smoke and may be menthol. In the examples high-density polyethylene was blended with calcite as nucleating agent and then active charcoal, triacetin or menthol, and the mixture was extruded, using isobutylene as blowing agent, to form a foamed strand which was pulled through a sizing and quenching apparatus to form foamed rods which were cut into elements to act as cigarette filters.
GB579973A 1973-02-06 1973-02-06 Cigarette filters Expired GB1442631A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
GB579973A GB1442631A (en) 1973-02-06 1973-02-06 Cigarette filters
AU65023/74A AU481537B2 (en) 1973-02-06 1974-01-31 Improved filters
DE19742404959 DE2404959C3 (en) 1973-02-06 1974-02-01 Cigarette filters
IT4813274A IT1002843B (en) 1973-02-06 1974-02-04 PERFECTED FILTERS ESPECIALLY CIGARETTE FILTERS
BE140528A BE810576A (en) 1973-02-06 1974-02-04 Cigarette filter of extruded micro-cellular structure - from thermoplastic synthetic resins, expanders and additives modifying the gaseous phase of the cigarette smoke
JP1485174A JPS49109599A (en) 1973-02-06 1974-02-05
CA191,788A CA1005724A (en) 1973-02-06 1974-02-05 Filters
FR7403753A FR2215905B1 (en) 1973-02-06 1974-02-05
BR83474A BR7400834D0 (en) 1973-02-06 1974-02-06 CIGARETTE FILTER; FOAMED BASKET AND CIGARETTE
CH166374A CH604572A5 (en) 1973-02-06 1974-02-06

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB579973A GB1442631A (en) 1973-02-06 1973-02-06 Cigarette filters
GB2442773 1973-05-22
GB4837573 1973-10-17

Publications (1)

Publication Number Publication Date
GB1442631A true GB1442631A (en) 1976-07-14

Family

ID=27254711

Family Applications (1)

Application Number Title Priority Date Filing Date
GB579973A Expired GB1442631A (en) 1973-02-06 1973-02-06 Cigarette filters

Country Status (8)

Country Link
JP (1) JPS49109599A (en)
BR (1) BR7400834D0 (en)
CA (1) CA1005724A (en)
CH (1) CH604572A5 (en)
DE (1) DE2404959C3 (en)
FR (1) FR2215905B1 (en)
GB (1) GB1442631A (en)
IT (1) IT1002843B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003039277A1 (en) 2001-11-05 2003-05-15 Hauni Maschinenbau Ag Filter segments or filter for cigarettes and method for the production thereof
WO2018007626A1 (en) * 2016-07-08 2018-01-11 Philip Morris Products S.A. Flavored tip or mouth-end insert for e-vaping or smokeable devices and manufacturing method thereof

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4729391A (en) * 1985-11-14 1988-03-08 R. J. Reynolds Tobacco Company Microporous materials in cigarette filter construction
US4763674A (en) * 1986-04-16 1988-08-16 Hercules Incorporated Method and device for controlling hydrogen cyanide and nitric oxide concentrations in cigarette smoke
IT1189495B (en) * 1986-05-09 1988-02-04 S P T Srl SYNTHETIC FIBERS WITH INCREASED VOLUMINOSITY, PROCEDURE TO PRODUCE THEM AND THEIR USE IN PARTICULAR FOR FILTERS
GB8611699D0 (en) * 1986-05-13 1986-06-18 British American Tobacco Co Smoking articles

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1202699B (en) * 1960-01-23 1965-10-07 Hoechst Ag Triacetin loaded tobacco smoke filter
FR1324235A (en) * 1960-11-15 1963-04-19 Philip Morris Inc Advanced filter for gases or vapors such as, in particular, tobacco smoke
US3311115A (en) * 1963-10-29 1967-03-28 Buckeye Cellulose Corp Low density aerosol filter
FR1446575A (en) * 1964-09-08 1966-07-22 Eastman Kodak Co New filters for tobacco smoke and composition used in these filters
US3217715A (en) * 1965-05-24 1965-11-16 American Filtrona Corp Smoke filter and smoking devices formed therewith

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003039277A1 (en) 2001-11-05 2003-05-15 Hauni Maschinenbau Ag Filter segments or filter for cigarettes and method for the production thereof
WO2018007626A1 (en) * 2016-07-08 2018-01-11 Philip Morris Products S.A. Flavored tip or mouth-end insert for e-vaping or smokeable devices and manufacturing method thereof

Also Published As

Publication number Publication date
DE2404959C3 (en) 1978-09-07
CH604572A5 (en) 1978-09-15
IT1002843B (en) 1976-05-20
FR2215905B1 (en) 1976-06-25
DE2404959B2 (en) 1978-01-05
DE2404959A1 (en) 1974-08-22
JPS49109599A (en) 1974-10-18
FR2215905A1 (en) 1974-08-30
AU6502374A (en) 1975-07-31
CA1005724A (en) 1977-02-22
BR7400834D0 (en) 1974-11-05

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee