US20040159414A1 - Cigarette - Google Patents
Cigarette Download PDFInfo
- Publication number
- US20040159414A1 US20040159414A1 US10/773,774 US77377404A US2004159414A1 US 20040159414 A1 US20040159414 A1 US 20040159414A1 US 77377404 A US77377404 A US 77377404A US 2004159414 A1 US2004159414 A1 US 2004159414A1
- Authority
- US
- United States
- Prior art keywords
- cellulose derivative
- paper
- layer
- cigarette
- 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
Definitions
- the invention is based on the problem of avoiding spotting on the wrappers of cigarettes.
- 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.
- the invention is based on the recognition that the impregnation can be sufficiently thin 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.
- 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.
- a cigarette paper wrapper for impregnating with a cellulose derivative.
- the cellulose derivative can be ethyl cellulose.
- a first layer of the cellulose derivative is applied to the cigarette paper wrapper.
- the cellulose derivative can be applied using a coating roller in a gravure process, however, other coating methods can be used.
- a second layer of cellulose derivative is applied and allowed to dry. Additional layers of cellulose derivative can be applied if needed. The user can allow the first layer of cellulose derivative to dry before applying the second layer of cellulose derivative.
- An advantage of applying the cellulose derivative in multiple layers is that a more even and uniform coating of the paper is achieved. Also, the application of the cellulose derivative in multiple steps decreased the likelihood of having “pinholes” of uncovered areas on the paper, since they are covered by successive layers of the cellulose derivative.
- Cigarette papers with a substance of 26 g/m 2 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/m 2 . Cigarettes were manufactured with the cigarette paper manufactured in this way.
- CAP cellulose azetoproprionate
- CAB cellulose azetobutyrate
- EC ethyl cellulose
Abstract
A cigarette is provided which includes a tobacco strand wrapped with a layer of paper having a water repellent impregnation made from a cellulose derivative. The water repellant impregnation is applied in at least two layers.
Description
- This application is a continuation in part of U.S. application Ser. No. 09/522,877 filed on Mar. 10, 2000.
- This applications asserts priority to European Application No. 99105581.5 filed on Mar. 13, 1999. The specification of European Application No. 99105581.5 is incorporated by reference.
- 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 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 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 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, U.S. Pat. No. 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 that the overall permeability remains sufficient. In this context, the possibility of making the inner wrapper water repellent by adding 0.5% 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 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.
- 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.
- Further details of the invention will be discussed hereinafter with reference to comparative tests.
- In a preferred embodiment, a cigarette paper wrapper is provided for impregnating with a cellulose derivative. The cellulose derivative can be ethyl cellulose. A first layer of the cellulose derivative is applied to the cigarette paper wrapper. The cellulose derivative can be applied using a coating roller in a gravure process, however, other coating methods can be used. After the first layer is applied, a second layer of cellulose derivative is applied and allowed to dry. Additional layers of cellulose derivative can be applied if needed. The user can allow the first layer of cellulose derivative to dry before applying the second layer of cellulose derivative.
- An advantage of applying the cellulose derivative in multiple layers is that a more even and uniform coating of the paper is achieved. Also, the application of the cellulose derivative in multiple steps decreased the likelihood of having “pinholes” of uncovered areas on the paper, since they are covered by successive layers of the cellulose derivative.
- Cigarette papers with a substance of 26 g/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/m2. 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 - 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 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 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 emphasized in particular that the success described was obtained even though the porosity of the paper, which was 50 Coresta units before coating, was still 20 Coresta units after coating. Initial tests with more porous paper as the starting material confirm that even with a final porosity of 50 Coresta units, the radical reduction in the tendency to spot, according to the invention, was obtained. (One Coresta unit (CU) indicates how many cm3 of air flow per minute through an area of 1 cm2 of paper under pressure of a 10 cm head of water.)
Claims (31)
1. A method for impregnating a layer of a cigarette paper wrapper with a water repellant coating to avoid spotting comprising:
applying a first layer of a cellulose derivative to said sheet of paper;
allowing said first layer to dry; and
applying a second layer of a cellulose derivative to a sheet of paper.
2. A method as described in claim 1 , wherein said cellulose derivative is ethyl cellulose.
3. A method as described in claim 2 , wherein the total amount of ethyl cellulose used for said layers of cellulose derivative combined is at least 1 g/m2.
4. A method as described in claim 2 , wherein said first layer and said second layer of cellulose derivative is applied on opposite sides of said paper.
5. A method as described in claim 2 , wherein said first and second layers of cellulose derivative is applied to the same side of said paper.
6. A method as described in claim 1 , wherein said first layer and said second layer of cellulose derivative is applied using a coating roller in a gravure process.
7. A method as described in claim 1 , wherein said impregnated layer of cigarette paper maintains an air permeability of at least 20 Coresta units.
8. A method for impregnating a layer of paper in order to avoid spotting in a cigarette comprising a tobacco strand wrapped with said layer of paper applying a water repellent impregnation made from a cellulose derivative in at least two layers while maintaining air permeability of at least 20 Coresta units.
9. A method according to claim 8 , wherein the cellulose derivative is applied in a quantity of at least 1 g/m2.
10. A method according to claim 8 , wherein the cellulose derivative is applied by means of a coating roller in a gravure process.
11. A method for impregnating a layer of a cigarette paper wrapper with a water repellant coating to avoid spotting comprising:
applying a first layer of a cellulose derivative to said sheet of paper; and
applying a second layer of a cellulose derivative to a sheet of paper.
12. A method as described in claim 11 , wherein said cellulose derivative is ethyl cellulose.
13. A method as described in claim 12 , wherein the total amount of ethyl cellulose used for said layers of cellulose derivative combined is at least 1 g/m2.
14. A method as described in claim 12 , wherein said first layer and said second layer of cellulose derivative is applied on opposite sides of said paper.
15. A method as described in claim 12 , wherein said first and second layers of cellulose derivative is applied to the same side of said paper.
16. A method as described in claim 11 , wherein said first layer and said second layer of cellulose derivative is applied using a coating roller in a gravure process.
17. A method as described in claim 11 , wherein said impregnated layer of cigarette paper maintains an air permeability of at least 20 Coresta units.
18. A cigarette comprising a tobacco strand wrapped with a layer of paper having a water repellent impregnation made from a cellulose derivative, said cellulose derivative consisting of at least two layers and providing air permeability of at least 20 Coresta units.
19. A cigarette as described in claim 18 , wherein the cellulose derivative is ethyl cellulose.
20. A cigarette as described in claim 18 , wherein the cellulose derivative provides air permeability of at least 50 Coresta units.
21. A cigarette as described in claim 18 , wherein the cellulose derivative is applied on both sides of the paper.
22. A cigarette as described in claim 18 , wherein the cellulose derivative is applied in a quantity of at least 1 g/m2.
23. A cigarette as described in claim 18 , wherein the cellulose derivative is applied by means of a coating roller in a gravure process.
24. A cigarette as described in claim 18 , wherein the wrapper is composed of only one layer of paper.
25. A cigarette wrapper comprising a water repellant impregnation made from a cellulose derivative, said cellulose derivative consisting of at least two layers and providing air permeability of least 20 Coresta units.
26. A cigarette wrapper as described in claim 25 , wherein said cellulose derivative is ethyl cellulose.
27. A cigarette wrapper as described in claim 25 , wherein said cellulose derivative provides air permeability of at least 50 Coresta units.
28. A cigarette wrapper as described in claim 25 , wherein the cellulose derivative is applied on both sides of the paper.
29. A cigarette wrapper as described in claim 25 , wherein the cellulose derivative is applied in a quantity of at least 1 g/m2.
30. A cigarette wrapper as described in claim 25 , wherein the cellulose derivative is applied by means of a coating roller in a gravure process.
31. A cigarette wrapper as described in claim 25 , wherein the wrapper is composed of only one layer of paper.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/773,774 US20040159414A1 (en) | 1999-03-13 | 2004-02-06 | Cigarette |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99105581.5 | 1999-03-13 | ||
EP99105581A EP1044615B1 (en) | 1999-03-13 | 1999-03-13 | Cigarette |
US52287700A | 2000-03-10 | 2000-03-10 | |
US10/773,774 US20040159414A1 (en) | 1999-03-13 | 2004-02-06 | Cigarette |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US52287700A Continuation-In-Part | 1999-03-13 | 2000-03-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040159414A1 true US20040159414A1 (en) | 2004-08-19 |
Family
ID=32852294
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/773,774 Abandoned US20040159414A1 (en) | 1999-03-13 | 2004-02-06 | Cigarette |
Country Status (1)
Country | Link |
---|---|
US (1) | US20040159414A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015042627A3 (en) * | 2013-09-27 | 2015-06-04 | Tannpapier Gmbh | Coating method |
WO2016063181A1 (en) * | 2014-10-20 | 2016-04-28 | Philip Morris Products S.A. | Hydrophobic plug wrap |
JP2016524913A (en) * | 2013-07-19 | 2016-08-22 | フィリップ・モーリス・プロダクツ・ソシエテ・アノニム | Hydrophobic paper |
AU2013315330B2 (en) * | 2012-09-17 | 2016-09-29 | Tannpapier Gmbh | Mouthpiece lining paper |
WO2020008510A1 (en) | 2018-07-02 | 2020-01-09 | 日本たばこ産業株式会社 | Wrapping paper for non-combustible heated type smoking article, non-combustible heated type smoking article, and electrically-heated smoking system |
CN113784637A (en) * | 2019-04-18 | 2021-12-10 | 日本烟草产业株式会社 | Non-combustion heating type cigarette and electric heating type cigarette product |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2091572A (en) * | 1934-02-15 | 1937-08-31 | Gardner Richardson Co | Paper manufacture |
US2149896A (en) * | 1935-02-12 | 1939-03-07 | Roxalin Flexible Lacquer Compa | Method of making cigarettes |
US3185161A (en) * | 1960-12-05 | 1965-05-25 | Fiore Joseph Vincent | Tobacco manufacture |
US3911932A (en) * | 1974-07-31 | 1975-10-14 | Philip Morris Inc | Control of smoking delivery through cigarette paper porosity |
US4140135A (en) * | 1975-12-29 | 1979-02-20 | Gulf & Western Corporation | Hydrophobic coating for tobacco sheet material |
US4784164A (en) * | 1986-01-07 | 1988-11-15 | Gallaher Limited | Smoking rod wrappers and compositions for their production |
US5722433A (en) * | 1995-08-09 | 1998-03-03 | Mishima Paper Co., Ltd. | Water-dispersible sheet for cigarettes and cigarette using the same |
-
2004
- 2004-02-06 US US10/773,774 patent/US20040159414A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2091572A (en) * | 1934-02-15 | 1937-08-31 | Gardner Richardson Co | Paper manufacture |
US2149896A (en) * | 1935-02-12 | 1939-03-07 | Roxalin Flexible Lacquer Compa | Method of making cigarettes |
US3185161A (en) * | 1960-12-05 | 1965-05-25 | Fiore Joseph Vincent | Tobacco manufacture |
US3911932A (en) * | 1974-07-31 | 1975-10-14 | Philip Morris Inc | Control of smoking delivery through cigarette paper porosity |
US4140135A (en) * | 1975-12-29 | 1979-02-20 | Gulf & Western Corporation | Hydrophobic coating for tobacco sheet material |
US4784164A (en) * | 1986-01-07 | 1988-11-15 | Gallaher Limited | Smoking rod wrappers and compositions for their production |
US5722433A (en) * | 1995-08-09 | 1998-03-03 | Mishima Paper Co., Ltd. | Water-dispersible sheet for cigarettes and cigarette using the same |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2013315330B2 (en) * | 2012-09-17 | 2016-09-29 | Tannpapier Gmbh | Mouthpiece lining paper |
US10542773B2 (en) | 2013-07-19 | 2020-01-28 | Philip Morris Products S.A. | Hydrophobic paper |
JP2016524913A (en) * | 2013-07-19 | 2016-08-22 | フィリップ・モーリス・プロダクツ・ソシエテ・アノニム | Hydrophobic paper |
KR20160094932A (en) * | 2013-09-27 | 2016-08-10 | 탄파피어 게엠베하 | Coating method |
US9986757B2 (en) | 2013-09-27 | 2018-06-05 | Tannpapier Gmbh | Coating method |
EA031273B1 (en) * | 2013-09-27 | 2018-12-28 | Танпапир Гмбх | Coating method |
WO2015042627A3 (en) * | 2013-09-27 | 2015-06-04 | Tannpapier Gmbh | Coating method |
KR102080372B1 (en) | 2013-09-27 | 2020-02-21 | 탄파피어 게엠베하 | Coating method |
WO2016063181A1 (en) * | 2014-10-20 | 2016-04-28 | Philip Morris Products S.A. | Hydrophobic plug wrap |
KR101785232B1 (en) | 2014-10-20 | 2017-11-06 | 필립모리스 프로덕츠 에스.에이. | Hydrophobic plug wrap |
US11439177B2 (en) | 2014-10-20 | 2022-09-13 | Philip Morris Products S.A. | Hydrophobic plug wrap |
WO2020008510A1 (en) | 2018-07-02 | 2020-01-09 | 日本たばこ産業株式会社 | Wrapping paper for non-combustible heated type smoking article, non-combustible heated type smoking article, and electrically-heated smoking system |
KR20210014139A (en) | 2018-07-02 | 2021-02-08 | 니뽄 다바코 산교 가부시키가이샤 | Non-combustible heated smoking article wrapper, non-combusted heated smoking article and electric heated smoking system |
CN113784637A (en) * | 2019-04-18 | 2021-12-10 | 日本烟草产业株式会社 | Non-combustion heating type cigarette and electric heating type cigarette product |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |