GB752358A - Tobacco smoke filter material - Google Patents

Tobacco smoke filter material

Info

Publication number
GB752358A
GB752358A GB297854A GB297854A GB752358A GB 752358 A GB752358 A GB 752358A GB 297854 A GB297854 A GB 297854A GB 297854 A GB297854 A GB 297854A GB 752358 A GB752358 A GB 752358A
Authority
GB
United Kingdom
Prior art keywords
fibrous materials
finely divided
water
acetone
rod
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
GB297854A
Inventor
Victor Emmanuel Yarsley
Witold Titow
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.)
British and Foreign Tobacco Co Ltd
Original Assignee
British and Foreign Tobacco Co 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 British and Foreign Tobacco Co Ltd filed Critical British and Foreign Tobacco Co Ltd
Priority to GB297854A priority Critical patent/GB752358A/en
Publication of GB752358A publication Critical patent/GB752358A/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
    • A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Abstract

Tobacco-smoke filter material in rod form, suitable for cutting into cigarette filter tips, is made by extruding into a hot or cold aqueous precipitating bath a composition comprising (a) a substantially water-insoluble cellulose acetate dissolved in a water-soluble solvent, e.g. acetone or glacial acetic acid; (b) a finely divided mineral or non-cellulosic synthetic fibrous material or a mixture thereof with one or more other finely divided fibrous materials; and (c) particles of a water-soluble solid, e.g. sodium chloride, sodium sulphate decahydrate or magnesium sulphate heptahydrate, so as to form a rod of fibres bonded together by the precipitated cellulose acetate, and containing pores formed by the leaching out of the particles of the water-soluble solid. When acetone is used as solvent, the formed rod is removed from the precipitating bath and heated to expel residual acetone. Natural, e.g. asbestos, or artificial, e.g. vitreous aluminium silicate, mineral fibrous materials may be used. Suitable non-cellulosic synthetic fibrous materials are nylon and synthetic linear polyesters such as those derived from terephthalic acid and ethylene glycol. The other finely divided fibrous materials may include cotton, wool, viscose rayon or tissue paper shredded by mixing the composition prior to extrusion. All the finely divided fibrous materials have a fibre length of less than 0.5 cm. A screw-type extruder may be employed. Quantitative process examples are given.ALSO:Tobacco smoke filter materials in rod form suitable for cutting into cigarette filter tips is made by extruding into a air hot or cold aqueous precipitating bath a composition comprising (a) a substantially water-insoluble cellulose acetate dissolved in a water-soluble solvent, e.g. acetone or glacial acetic acid, (b) a finely divided mineral or non-cellulosic synthetic fibrous material or a mixture thereof with one or more further finely divided fibrous materials and (c) particles of a water-soluble solid, e.g. sodium chloride, sodium sulphate decahydrate or magnesium sulphate heptahydrate, so as to form a rod of fibres bonded together by the precipitated cellulose acetate, and containing pores formed by leaching out of the particles of the water-soluble solid. When acetone is used as solvent, the formed rod is removed from the precipitating bath and heated to expel residual acetone. Natural, e.g. asbestos, or artificial, e.g. vitreous aluminium silicate, mineral fibrous materials may be used. Suitable non-cellulosic synthetic fibrous materials are nylon and synthetic linear polyesters such as those derived from terephthalic acid and ethylene glycol. The further finely divided fibrous materials may include cotton, wool, viscose rayon or tissue paper shredded by mixing of the composition prior to extrusion. All the finely divided fibrous materials have a fibre length of less than 0.5 cm. A screw-type extruder may be employed. Quantitative process examples are given. The Registered Trade Mark "Fiberfrax" is mentioned.ALSO:Tobacco smoke filter material in rod form suitable for cutting into cigarette filter tips is made by extruding into a hot or cold aqueous precipitating bath a composition comprising (a) a substantially water-insoluble solvent, e.g. acetone or glacial acetic acid, (b) a finely divided mineral or non-cellulosic synthetic fibrous material or a mixture thereof with one or more further finely divided fibrous materials and (c) particles of a water-soluble solid, e.g. sodium chloride, sodium sulphate decahydrate or magnesium sulphate heptahydrate, so as to form a rod, of fibres bonded together by the precipitated cellulose acetate, and containing pores formed by leaching out of the particles of the water-soluble solid. When acetone is used as solvent, the formed rod is removed from the precipitating bath and heated to expel residual acetone. Natural, e.g. asbestos, or artificial, e.g. vitreous aluminium silicate, mineral fibrous materials may be used. Suitable non-cellulosic synthetic fibrous materials are nylon and synthetic linear polyesters such as those derived from terephthalic acid and ethylene glycol. The further finely divided fibrous materials may include cotton, wool, viscose rayon or tissue paper shredded by mixing of the composition prior to extrusion. All the finely divided fibrous materials have a fibre length of less than 0,5 cm. A screw-type extruder may be employed. Quantitative process examples are given. The Registered Trade Mark "Fiberfrax" is mentioned.
GB297854A 1954-02-01 1954-02-01 Tobacco smoke filter material Expired GB752358A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB297854A GB752358A (en) 1954-02-01 1954-02-01 Tobacco smoke filter material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB297854A GB752358A (en) 1954-02-01 1954-02-01 Tobacco smoke filter material

Publications (1)

Publication Number Publication Date
GB752358A true GB752358A (en) 1956-07-11

Family

ID=9749615

Family Applications (1)

Application Number Title Priority Date Filing Date
GB297854A Expired GB752358A (en) 1954-02-01 1954-02-01 Tobacco smoke filter material

Country Status (1)

Country Link
GB (1) GB752358A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3356094A (en) * 1965-09-22 1967-12-05 Battelle Memorial Institute Smoking devices
US4059119A (en) * 1974-06-13 1977-11-22 Montclair Research Corporation Cigarette and filter
US4126141A (en) * 1975-03-26 1978-11-21 Montclair Research Corporation Filter and cigarette including a filter
US4149549A (en) * 1976-05-17 1979-04-17 Montclair Research Corporation Cigarette and filter
US4729389A (en) * 1976-12-06 1988-03-08 Anderson Joseph H Filter for tobacco smoke
GB2232674A (en) * 1989-05-12 1990-12-19 Secr Defence Microporous organic foam products

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3356094A (en) * 1965-09-22 1967-12-05 Battelle Memorial Institute Smoking devices
US4059119A (en) * 1974-06-13 1977-11-22 Montclair Research Corporation Cigarette and filter
US4126141A (en) * 1975-03-26 1978-11-21 Montclair Research Corporation Filter and cigarette including a filter
US4149549A (en) * 1976-05-17 1979-04-17 Montclair Research Corporation Cigarette and filter
US4729389A (en) * 1976-12-06 1988-03-08 Anderson Joseph H Filter for tobacco smoke
GB2232674A (en) * 1989-05-12 1990-12-19 Secr Defence Microporous organic foam products
GB2232674B (en) * 1989-05-12 1993-07-21 Secr Defence Microporous organic foam products

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