US3196037A - Preparation of cigarette filter tips - Google Patents
Preparation of cigarette filter tips Download PDFInfo
- 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
- Authority
- 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
Links
- 235000019504 cigarettes Nutrition 0.000 title claims description 10
- 238000002360 preparation method Methods 0.000 title description 2
- 229920002301 cellulose acetate Polymers 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000011159 matrix material Substances 0.000 description 5
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 4
- 241000208125 Nicotiana Species 0.000 description 3
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229960000583 acetic acid Drugs 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000012362 glacial acetic acid Substances 0.000 description 2
- 238000010952 in-situ formation Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- IOVGROKTTNBUGK-SJCJKPOMSA-N ritodrine Chemical compound N([C@@H](C)[C@H](O)C=1C=CC(O)=CC=1)CCC1=CC=C(O)C=C1 IOVGROKTTNBUGK-SJCJKPOMSA-N 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
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
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.
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)
| 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2285908A (en) * | 1994-01-25 | 1995-08-02 | Gallaher Ltd | Filter material |
Citations (12)
| 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 |
-
1960
- 1960-06-03 GB GB19750/60A patent/GB992741A/en not_active Expired
-
1961
- 1961-05-31 DE DE19611432755 patent/DE1432755A1/de active Pending
- 1961-06-01 US US114025A patent/US3196037A/en not_active Expired - Lifetime
- 1961-06-03 CH CH649861A patent/CH427616A/en unknown
Patent Citations (12)
| 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)
| 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 |
|---|---|
| CH427616A (en) | 1966-12-31 |
| GB992741A (en) | 1965-05-19 |
| DE1432755A1 (en) | 1968-12-12 |
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