CA2300715A1 - Cigarette - Google Patents
Cigarette Download PDFInfo
- Publication number
- CA2300715A1 CA2300715A1 CA002300715A CA2300715A CA2300715A1 CA 2300715 A1 CA2300715 A1 CA 2300715A1 CA 002300715 A CA002300715 A CA 002300715A CA 2300715 A CA2300715 A CA 2300715A CA 2300715 A1 CA2300715 A1 CA 2300715A1
- Authority
- CA
- Canada
- Prior art keywords
- paper
- cigarette
- cellulose derivative
- cellulose
- wrapper
- 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.)
- Abandoned
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
- A24D1/00—Cigars; Cigarettes
- A24D1/02—Cigars; Cigarettes with special covers
Landscapes
- Paper (AREA)
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
- Laminated Bodies (AREA)
- Manufacture Of Tobacco Products (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
Cigarette, the wrapper of which comprises a layer of paper with water impregnation made from a cellulose derivative.
Description
The invention is based on the problem of avoiding spotting on the wrappers of cigarettes.
The buyers of cigarettes consider the spotless white appearance of a cigarette as an indication of quality. Even if this opinion is not particularly correct - in hot, humid climates cigarettes can show discoloration even after a short period of storage, which ~o does not affect the smoke flavour - manufacturers have to focus upon market expectations.
Spotting of cigarette paper can be explained in that dissolved substances contained in the tobacco can penetrate the paper at the points of contact between the paper and the ~5 tobacco particles, as said paper is both porous and hydrophilic.
It would be conceivable to reduce spotting on cigarette paper in that said paper is coated with any substances that would make the paper completely impervious.
Such coatings have been proposed in order to effect rapid extinguishing of discarded 2o cigarettes. In order to be able to control the content of different substances contained in the smoke, however, the cigarette manufacturer is generally interested in a certain degree of air permeability of the cigarette paper. The problem is consequently to, on the one hand, keep the paper permeable for air, and on the other hand to reduce the permeability for dissolved cigarette ingredients.
For solving the problem, US-A 5,143 099 proposed to form the cigarette wrapper using two layers of paper, wherein the inner wrapper is provided with a very high degree of permeability, so tha; the overall permeability remains sufficient.
In this context, the possibility of making the inner wrapper water repellent by adding 0.5%
so alkyl ketene dimer was mentioned.
In comparison with the prior art described, the object of the invention is to make the use of two layers of paper superfluous, this being by means of an impregnating agent that is harmless and changes the smoke flavour as little as possible.
It was unexpected that providing the cigarette with a wrapper that comprises a layer of paper with water repellent impregnation made from a cellulose derivative, in particular of ethyl cellulose, would lead to a solution of the object. EP 0 419 981 does describe such a cigarette, in which, however, the air permeability is below 5 Coresta units.
The invention is based on the recognition that the impregnation can be sufficiently thin ~o to retain the desired air permeability, if it is applied in several layers.
It is thus provided according to the invention that the cellulose derivative is applied in several . layers in order to obtain an air permeability in the wrapper of at least 20, preferably 50 Coresta units.
~5 Different cellulose derivatives per se satisfy the physical criteria required with respect to air permeability and water permeability in the impregnated paper, for example, sufficiently highly derived cellulose ether and cellulose ester (for example, nitrocellulose). Ethyl cellulose is preferred, however, as it is harmless - it complies with the German regulations - and makes practically no change to the smoke flavour.
zo Further details of the invention will be discussed hereinafter with reference to comparative tests.
z5 Cigarette papers with a substance of 26g/m2 were coated, in a gravure process by means of a coating roller, with cellulose azetoproprionate (CAP) or with cellulose azetobutyrate (CAB) or with ethyl cellulose (EC). The amount applied was approximately 0.7 g/mz. Cigarettes were manufactured with the cigarette paper manufactured in this way.
In order to test their spotting tendency, the cigarettes were stored packaged and unpackaged at either 20°C and 60% relative humidity or 30°C and 80% relative humidity. Examination for spotting (in each case 100 cigarettes) was carried out immediately after production and after 24 and 48 hours. An evaluation was made according to spot size and number, and the results were converted, by means of weighting, into a point system.
The evaluation produced the following results:
Coating with 0.7 g EC 572 points Coating with 0.7 g CAP 223 points Coating with 0.7 g CAB 77 points ~a Although ethyl cellulose coated paper showed a comparatively strong tendency for spotting (large number of spots), the further development was carried out with this material, as an undesired change in the smoke character was determined with CAP and ' CAB. Even with the use of EC coated paper, a significantly lower spotting frequency ~ 5 was nevertheless determined, compared with uncoated paper. After approximately one month, however, the cigarettes manufactured using paper coated with EC showed no dark spots, whereas large yellow spots appeared on those with uncoated paper.
This is probably because coloring agents penetrate the paper through flaws in the coating, the spreading of which agents is prevented by the coating. Due to these observations, the 2o tests were repeated with twice-coated paper, that is to say with cigarette paper loaded with 1.4 g/m2. With this, the spotting tendency decreased, according to the method of calculation described hereinabove, to 56 points, that is to say it reduced by the power of 10 compared to the single coating. This excellent result was confirmed in long-term testing.
It is to be emphasised in particular that the success described was obtained even though the porosity of the paper, which was SO Coresta units before coating, was still 20 Coresta units after coating. Initial tests with more porous paper as the starting material confirm that even ~~ith a final porosity of 50 Coresta units, the radical so reduction in the tendency to spot, according to the invention, was obtained. (One Coresta unit (CU) indicates how many cmz of air flow per minute through an area of 1 cm2 of paper under pressure of a 10 cm head of water.)
The buyers of cigarettes consider the spotless white appearance of a cigarette as an indication of quality. Even if this opinion is not particularly correct - in hot, humid climates cigarettes can show discoloration even after a short period of storage, which ~o does not affect the smoke flavour - manufacturers have to focus upon market expectations.
Spotting of cigarette paper can be explained in that dissolved substances contained in the tobacco can penetrate the paper at the points of contact between the paper and the ~5 tobacco particles, as said paper is both porous and hydrophilic.
It would be conceivable to reduce spotting on cigarette paper in that said paper is coated with any substances that would make the paper completely impervious.
Such coatings have been proposed in order to effect rapid extinguishing of discarded 2o cigarettes. In order to be able to control the content of different substances contained in the smoke, however, the cigarette manufacturer is generally interested in a certain degree of air permeability of the cigarette paper. The problem is consequently to, on the one hand, keep the paper permeable for air, and on the other hand to reduce the permeability for dissolved cigarette ingredients.
For solving the problem, US-A 5,143 099 proposed to form the cigarette wrapper using two layers of paper, wherein the inner wrapper is provided with a very high degree of permeability, so tha; the overall permeability remains sufficient.
In this context, the possibility of making the inner wrapper water repellent by adding 0.5%
so alkyl ketene dimer was mentioned.
In comparison with the prior art described, the object of the invention is to make the use of two layers of paper superfluous, this being by means of an impregnating agent that is harmless and changes the smoke flavour as little as possible.
It was unexpected that providing the cigarette with a wrapper that comprises a layer of paper with water repellent impregnation made from a cellulose derivative, in particular of ethyl cellulose, would lead to a solution of the object. EP 0 419 981 does describe such a cigarette, in which, however, the air permeability is below 5 Coresta units.
The invention is based on the recognition that the impregnation can be sufficiently thin ~o to retain the desired air permeability, if it is applied in several layers.
It is thus provided according to the invention that the cellulose derivative is applied in several . layers in order to obtain an air permeability in the wrapper of at least 20, preferably 50 Coresta units.
~5 Different cellulose derivatives per se satisfy the physical criteria required with respect to air permeability and water permeability in the impregnated paper, for example, sufficiently highly derived cellulose ether and cellulose ester (for example, nitrocellulose). Ethyl cellulose is preferred, however, as it is harmless - it complies with the German regulations - and makes practically no change to the smoke flavour.
zo Further details of the invention will be discussed hereinafter with reference to comparative tests.
z5 Cigarette papers with a substance of 26g/m2 were coated, in a gravure process by means of a coating roller, with cellulose azetoproprionate (CAP) or with cellulose azetobutyrate (CAB) or with ethyl cellulose (EC). The amount applied was approximately 0.7 g/mz. Cigarettes were manufactured with the cigarette paper manufactured in this way.
In order to test their spotting tendency, the cigarettes were stored packaged and unpackaged at either 20°C and 60% relative humidity or 30°C and 80% relative humidity. Examination for spotting (in each case 100 cigarettes) was carried out immediately after production and after 24 and 48 hours. An evaluation was made according to spot size and number, and the results were converted, by means of weighting, into a point system.
The evaluation produced the following results:
Coating with 0.7 g EC 572 points Coating with 0.7 g CAP 223 points Coating with 0.7 g CAB 77 points ~a Although ethyl cellulose coated paper showed a comparatively strong tendency for spotting (large number of spots), the further development was carried out with this material, as an undesired change in the smoke character was determined with CAP and ' CAB. Even with the use of EC coated paper, a significantly lower spotting frequency ~ 5 was nevertheless determined, compared with uncoated paper. After approximately one month, however, the cigarettes manufactured using paper coated with EC showed no dark spots, whereas large yellow spots appeared on those with uncoated paper.
This is probably because coloring agents penetrate the paper through flaws in the coating, the spreading of which agents is prevented by the coating. Due to these observations, the 2o tests were repeated with twice-coated paper, that is to say with cigarette paper loaded with 1.4 g/m2. With this, the spotting tendency decreased, according to the method of calculation described hereinabove, to 56 points, that is to say it reduced by the power of 10 compared to the single coating. This excellent result was confirmed in long-term testing.
It is to be emphasised in particular that the success described was obtained even though the porosity of the paper, which was SO Coresta units before coating, was still 20 Coresta units after coating. Initial tests with more porous paper as the starting material confirm that even ~~ith a final porosity of 50 Coresta units, the radical so reduction in the tendency to spot, according to the invention, was obtained. (One Coresta unit (CU) indicates how many cmz of air flow per minute through an area of 1 cm2 of paper under pressure of a 10 cm head of water.)
Claims (5)
1. Cigarette, the tobacco strand of which is wrapped around with a layer of paper with water repellent impregnation made from a cellulose derivative, preferably of ethyl cellulose, wherein in order to obtain air permeability in the wrapper of at least 20 Coresta units, preferably at least 50 Coresta units, the cellulose derivative is applied in several layers.
2. Cigarette according to claim 1, wherein the cellulose derivative is applied on both sides of the paper.
3. Cigarette according to claim 1 or 2, wherein the cellulose derivative is applied in a quantity of at least 1 g/m2.
4. Cigarette according to one of claims 1 to 3, wherein the cellulose derivative is applied by means of a coating roller in a gravure process.
5. Cigarette according to one of claims 1 to 4, wherein the wrapper is composed of only one layer of paper,
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP99105581.5 | 1999-03-13 | ||
| EP99105581A EP1044615B1 (en) | 1999-03-13 | 1999-03-13 | Cigarette |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2300715A1 true CA2300715A1 (en) | 2000-09-13 |
Family
ID=8237800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002300715A Abandoned CA2300715A1 (en) | 1999-03-13 | 2000-03-10 | Cigarette |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP1044615B1 (en) |
| CN (1) | CN1132533C (en) |
| AT (1) | ATE250871T1 (en) |
| AU (1) | AU762319B2 (en) |
| BR (1) | BR0001272B1 (en) |
| CA (1) | CA2300715A1 (en) |
| DE (1) | DE59907190D1 (en) |
| ES (1) | ES2202946T3 (en) |
| MY (1) | MY125835A (en) |
| RU (1) | RU2197876C2 (en) |
| UA (1) | UA65583C2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2013315330B2 (en) * | 2012-09-17 | 2016-09-29 | Tannpapier Gmbh | Mouthpiece lining paper |
| US10588346B2 (en) | 2014-10-20 | 2020-03-17 | Philip Morris Products S.A. | Hydrophobic wrapper |
| US11071320B2 (en) | 2013-07-16 | 2021-07-27 | Philip Morris Products S.A. | Smoking article filter for easy extinguishing |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0514959D0 (en) * | 2005-07-21 | 2005-08-24 | British American Tobacco Co | Smoking article |
| CN101803801B (en) * | 2010-04-07 | 2013-05-08 | 黑龙江烟草工业有限责任公司 | Humectant for smoke |
| AT511936B1 (en) | 2011-12-01 | 2013-04-15 | Tannpapier Gmbh | MUNDSTÜCKBELAGSPAPIER FOR A SMOKE ITEM |
| AT512347B1 (en) | 2011-12-23 | 2013-09-15 | Tannpapier Gmbh | AS A FILM TRAINED MOUTHPIECE OF A FILTER CIGARETTE |
| AT513413B1 (en) | 2012-09-17 | 2014-12-15 | Tannpapier Gmbh | Layered composite on a smoking article |
| RU2666676C2 (en) * | 2013-07-19 | 2018-09-11 | Филип Моррис Продактс, С.А. | Hydrophobic paper |
| AT514862B1 (en) | 2013-09-27 | 2015-06-15 | Tannpapier Gmbh | coating process |
| CN105873460A (en) * | 2014-10-20 | 2016-08-17 | 菲利普莫里斯生产公司 | Hydrophobic plug wrap |
| TWI682727B (en) * | 2014-12-23 | 2020-01-21 | 瑞士商菲利浦莫里斯製品股份有限公司 | Hydrophobic rolling paper |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0196775B1 (en) * | 1985-02-28 | 1989-05-10 | Gallaher Limited | Printing inks and printed substrates |
| US4941486A (en) * | 1986-02-10 | 1990-07-17 | Dube Michael F | Cigarette having sidestream aroma |
| FR2650735B1 (en) | 1989-08-14 | 1991-11-29 | Mauduit Papeteries | PROCESS FOR REDUCING OR ELIMINATING SPOT FORMATION ON A CIGARETTE, CIGARETTE AND CIGARETTE PAPER RELATING TO THE PROCESS |
| US5105836A (en) * | 1989-09-29 | 1992-04-21 | R. J. Reynolds Tobacco Company | Cigarette and smokable filler material therefor |
-
1999
- 1999-03-13 DE DE59907190T patent/DE59907190D1/en not_active Expired - Lifetime
- 1999-03-13 AT AT99105581T patent/ATE250871T1/en active
- 1999-03-13 ES ES99105581T patent/ES2202946T3/en not_active Expired - Lifetime
- 1999-03-13 EP EP99105581A patent/EP1044615B1/en not_active Expired - Lifetime
-
2000
- 2000-03-09 AU AU20788/00A patent/AU762319B2/en not_active Ceased
- 2000-03-10 RU RU2000106117/13A patent/RU2197876C2/en not_active IP Right Cessation
- 2000-03-10 BR BRPI0001272-6A patent/BR0001272B1/en not_active IP Right Cessation
- 2000-03-10 CA CA002300715A patent/CA2300715A1/en not_active Abandoned
- 2000-03-10 UA UA2000031410A patent/UA65583C2/en unknown
- 2000-03-10 CN CN00103866.4A patent/CN1132533C/en not_active Expired - Fee Related
- 2000-03-11 MY MYPI20000967A patent/MY125835A/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2013315330B2 (en) * | 2012-09-17 | 2016-09-29 | Tannpapier Gmbh | Mouthpiece lining paper |
| US11071320B2 (en) | 2013-07-16 | 2021-07-27 | Philip Morris Products S.A. | Smoking article filter for easy extinguishing |
| US10588346B2 (en) | 2014-10-20 | 2020-03-17 | Philip Morris Products S.A. | Hydrophobic wrapper |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1044615B1 (en) | 2003-10-01 |
| UA65583C2 (en) | 2004-04-15 |
| BR0001272B1 (en) | 2010-07-27 |
| CN1132533C (en) | 2003-12-31 |
| MY125835A (en) | 2006-08-30 |
| AU762319B2 (en) | 2003-06-26 |
| CN1266656A (en) | 2000-09-20 |
| EP1044615A1 (en) | 2000-10-18 |
| DE59907190D1 (en) | 2003-11-06 |
| BR0001272A (en) | 2001-03-13 |
| ATE250871T1 (en) | 2003-10-15 |
| ES2202946T3 (en) | 2004-04-01 |
| AU2078800A (en) | 2000-09-21 |
| RU2197876C2 (en) | 2003-02-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |