US3196037A - Preparation of cigarette filter tips - Google Patents

Preparation of cigarette filter tips Download PDF

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Publication number
US3196037A
US3196037A US114025A US11402561A US3196037A US 3196037 A US3196037 A US 3196037A US 114025 A US114025 A US 114025A US 11402561 A US11402561 A US 11402561A US 3196037 A US3196037 A US 3196037A
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US
United States
Prior art keywords
cellulose acetate
carrier
cigarette
active
preparation
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
US114025A
Inventor
Yarsley Victor Emmanuel
Titow Witold
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.)
YARSLEY RES LAB Ltd
YARSLEY RESEARCH LABORATORIES Ltd
Original Assignee
YARSLEY RES LAB 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 YARSLEY RES LAB Ltd filed Critical YARSLEY RES LAB Ltd
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Publication of US3196037A publication Critical patent/US3196037A/en
Anticipated expiration legal-status Critical
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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of 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

Definitions

  • cellulose acetate in cigarette filter tips is well known.
  • Cellulose acetate is most frequently employed for this purpose in the form of non-porous continuous fi aments, since in this form it is more easily controlled in processing operations, and when arranged collectively in a filter wad, is known to act as filtration medium for tobacco smoke.
  • the preparation of cellulose acetate by a spinning process is a long established art, and novel Ways of improving its effectiveness in filter wads, for example, by crimping, have hitherto been described. In all cases however the cellulose acetate has been prepar d by processes well known in the textile industry.
  • the active cellulose acetate may be impregnated into or coated on to one or both sides of a carrier matrix, such as, for example, paper tissue or natural or synthetic materials in the form of fabric, woven or non-Woven, or in the form of a loose fibre mat in which the fibres may be bonded or unbonded and parallel or criss-cross.
  • a carrier matrix such as, for example, paper tissue or natural or synthetic materials in the form of fabric, woven or non-Woven, or in the form of a loose fibre mat in which the fibres may be bonded or unbonded and parallel or criss-cross.
  • the formed sheet reinforced or otherwise may be cut up into shreds in the same way as tobacco, which can then be processed into filter wads, by the use of conventional cigarette manufacturing machines.
  • a method for the manufacture of cigarette filters from cellulose acetate which has a pitted active surface comprising the steps of impregnating a fibrous sheet carrier with a solution of cellulose acetate which has added thereto a precipitant liquid in an amount adjusted to up preach the precipitation point, treating the so impregnated carrier with the precipitant to occasion in situ formation of the active cellulose acetate on the carrier the said impregnated carrier being adapted to be formed into a filter tip for association with a cigarette.
  • a method for the manufacture of cigarette filters from cellulose acetate which has a pitted active surface comprising the steps of impregnating a fibrous matrix with a solution of cellulose acetate which has added thereto a precipitant liquid in an amount adjusted to approach the precipitation point, treating substantially all of the so impregnated matrix with the precipitant liquid to occasion in situ formation of the active cellulose acetate on the carrier the said impregnated carrier being adapted to be formed into a filter tip for association with a cigarette.
  • fibrous matrix is in the form of cut fibers selected from the group consisting of cellulose and cellulose acetate.

Landscapes

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

Description

United States Patent Office Fatented July 24), 1965 This invention relates to filter tips and to their produc tion.
The use of cellulose acetate in cigarette filter tips is well known. Cellulose acetate is most frequently employed for this purpose in the form of non-porous continuous fi aments, since in this form it is more easily controlled in processing operations, and when arranged collectively in a filter wad, is known to act as filtration medium for tobacco smoke. The preparation of cellulose acetate by a spinning process is a long established art, and novel Ways of improving its effectiveness in filter wads, for example, by crimping, have hitherto been described. In all cases however the cellulose acetate has been prepar d by processes well known in the textile industry.
it has been proposed to use in cigarette filter tips flake cellulose acetate which has a porous micro-rugose or pitted surface termed active, Flake material possessing this broken or pitted surface is stated to be particularly efiicient in the filtration of tobacco smoke. This improvement is directly attributed to the nature of the surface. The active surface referred to above differs from cast film or spun fibre, or flake, which, by reasons of its method of production and/or processing, for example by contact with solvents or solvent vapours, or by layers of coating or adhesive, has a smooth and unbroken surface.
The active cellulose acetate may be impregnated into or coated on to one or both sides of a carrier matrix, such as, for example, paper tissue or natural or synthetic materials in the form of fabric, woven or non-Woven, or in the form of a loose fibre mat in which the fibres may be bonded or unbonded and parallel or criss-cross. This provides a substantially reinforced cellulose acetate sheet, possessing the micro-rugose active surface. Such a reinforced cellulose acetate sheet was produced as follows:
A matrix of cellulose fibres which had been previously sprayed with glacial acetic acid, was impregnated with a solution of 7.5 parts by Weight of cellulose acetate in 92.5
parts by weight of glacial acetic acid, to which 30 parts by weight of water has been added, the excess of the impregnating solution was squeezed out and the impregnated sheet was immersed in water between two perforated plates, so that the water was able to permeate the sheet while the sheet was maintained under slight pressure and held flat.
The formed sheet reinforced or otherwise may be cut up into shreds in the same way as tobacco, which can then be processed into filter wads, by the use of conventional cigarette manufacturing machines.
What we claim is:
1. A method for the manufacture of cigarette filters from cellulose acetate which has a pitted active surface comprising the steps of impregnating a fibrous sheet carrier with a solution of cellulose acetate which has added thereto a precipitant liquid in an amount adjusted to up preach the precipitation point, treating the so impregnated carrier with the precipitant to occasion in situ formation of the active cellulose acetate on the carrier the said impregnated carrier being adapted to be formed into a filter tip for association with a cigarette.
Z. A method for the manufacture of cigarette filters from cellulose acetate which has a pitted active surface comprising the steps of impregnating a fibrous matrix with a solution of cellulose acetate which has added thereto a precipitant liquid in an amount adjusted to approach the precipitation point, treating substantially all of the so impregnated matrix with the precipitant liquid to occasion in situ formation of the active cellulose acetate on the carrier the said impregnated carrier being adapted to be formed into a filter tip for association with a cigarette.
3. The process of claim 2 wherein the fibrous matrix is in the form of cut fibers selected from the group consisting of cellulose and cellulose acetate.
References Cited by the Examiner UNITED STATES PATENTS 1,640,596 8/27 Chatham 1l7-158 2,754,829 7/56 Hess 131208 2,759,853 8/56 Smith 1l7--166 2,780,228 2/57 Touey 131208 2,806,474 9/57 Yarsley 131-10 2,916,038 12/59 Wade 131-10 2,916,777 12/59 Crane et al 131-208 2,923,034 2/60 Dickie et al. 131-208 3,025,130 3/62 White 264168 3,060,501 10/62 Beal 264 FOREIGN PATENTS 838,419 5/52 Germany. 654,994 7/51 Great Britain.
SAMUEL KOREN, Primary Examiner.
MELVIN D. REIN, Examiner.

Claims (1)

1. A METHOD FOR THE MANUFACTURE OF CIGARETTE FILTERS FROM CELLULOSE ACETATE WHICH HAS A PITTED "ACTIVE" SURFACE COMPRISING THE STEPS OF IMPREGNATING A FIBROUS SHEET CARRIER WITH A SOLUTION OF CELLULOSE ACETATE WHICH HAS ADDED THERETO A PRECIPITANT LIQUID IN AN AMOUNT ADJUSTED TO APPROACH THE PRECIPITATION POINT, TREATING THE SO IMPREGNATED CARRIER WITH THE PRECIPITANT TO OCCASION "IN SITU" FORMATION OF THE "ACTIVE" CELLULOSE ACETATE ON THE CARRIER THE SAID IMPREGNATED CARRIER BEING ADAPTED TO BE FORMED INTO A FILTER TIP FOR ASSOCIATION WITH A CIGARETTE.
US114025A 1960-06-03 1961-06-01 Preparation of cigarette filter tips Expired - Lifetime US3196037A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB19750/60A GB992741A (en) 1960-06-03 1960-06-03 Preparation of cigarette filter tips

Publications (1)

Publication Number Publication Date
US3196037A true US3196037A (en) 1965-07-20

Family

ID=10134582

Family Applications (1)

Application Number Title Priority Date Filing Date
US114025A Expired - Lifetime US3196037A (en) 1960-06-03 1961-06-01 Preparation of cigarette filter tips

Country Status (4)

Country Link
US (1) US3196037A (en)
CH (1) CH427616A (en)
DE (1) DE1432755A1 (en)
GB (1) GB992741A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4283186A (en) * 1976-10-06 1981-08-11 Celanese Corporation Method of forming cigarette filter material

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2285908A (en) * 1994-01-25 1995-08-02 Gallaher Ltd Filter material

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1640596A (en) * 1921-07-18 1927-08-30 Celanese Corp Treatment of fabrics, paper, and other materials
GB654994A (en) * 1947-06-16 1951-07-04 Elie Pouterman Improvements in or relating to filters for tobacco smoke and methods of manufacturing such filters
DE838419C (en) * 1950-03-02 1952-05-08 Willy Brandegger Dipl Ing Procedure for avoiding annoying burnbacks with smoking tobacco
US2754829A (en) * 1950-02-21 1956-07-17 Howard V Hess Smoke filter
US2759853A (en) * 1951-08-03 1956-08-21 Hercules Powder Co Ltd Process for making coated paper
US2780228A (en) * 1954-03-03 1957-02-05 Eastman Kodak Co Filters for tobacco smoke comprising cellulose esters and ethers
US2806474A (en) * 1953-06-29 1957-09-17 Yarsley Victor Emmanuel Production of filter elements
US2916038A (en) * 1954-02-23 1959-12-08 American Viscose Corp Tobacco smoke filter
US2916777A (en) * 1954-09-16 1959-12-15 Eastman Kodak Co Improved method of extruding a tobacco smoke filter
US2923034A (en) * 1954-07-02 1960-02-02 British Celanese Process for the manufacture of filter bodies
US3025130A (en) * 1959-02-03 1962-03-13 Celanese Corp Wet spinning of low density cellulose acetate filaments
US3060501A (en) * 1960-05-27 1962-10-30 Crawford & Russell Inc Method and apparatus for treatment of polymers

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1640596A (en) * 1921-07-18 1927-08-30 Celanese Corp Treatment of fabrics, paper, and other materials
GB654994A (en) * 1947-06-16 1951-07-04 Elie Pouterman Improvements in or relating to filters for tobacco smoke and methods of manufacturing such filters
US2754829A (en) * 1950-02-21 1956-07-17 Howard V Hess Smoke filter
DE838419C (en) * 1950-03-02 1952-05-08 Willy Brandegger Dipl Ing Procedure for avoiding annoying burnbacks with smoking tobacco
US2759853A (en) * 1951-08-03 1956-08-21 Hercules Powder Co Ltd Process for making coated paper
US2806474A (en) * 1953-06-29 1957-09-17 Yarsley Victor Emmanuel Production of filter elements
US2916038A (en) * 1954-02-23 1959-12-08 American Viscose Corp Tobacco smoke filter
US2780228A (en) * 1954-03-03 1957-02-05 Eastman Kodak Co Filters for tobacco smoke comprising cellulose esters and ethers
US2923034A (en) * 1954-07-02 1960-02-02 British Celanese Process for the manufacture of filter bodies
US2916777A (en) * 1954-09-16 1959-12-15 Eastman Kodak Co Improved method of extruding a tobacco smoke filter
US3025130A (en) * 1959-02-03 1962-03-13 Celanese Corp Wet spinning of low density cellulose acetate filaments
US3060501A (en) * 1960-05-27 1962-10-30 Crawford & Russell Inc Method and apparatus for treatment of polymers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4283186A (en) * 1976-10-06 1981-08-11 Celanese Corporation Method of forming cigarette filter material

Also Published As

Publication number Publication date
GB992741A (en) 1965-05-19
CH427616A (en) 1966-12-31
DE1432755A1 (en) 1968-12-12

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