Smoking articles with reduced ignition proclivity characteristics
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A24D-001/02
D21H-011/00
D21H-013/00
D21H-015/00
D21H-017/00
D21H-019/00
D21H-021/00
D21H-023/00
D21H-025/00
D21H-027/00
A24C-005/00
출원번호
US-0891375
(2004-07-14)
등록번호
US-8863757
(2014-10-21)
발명자
/ 주소
Kraker, Thomas A.
출원인 / 주소
Schweitzer-Mauduit International, Inc.
대리인 / 주소
Dority & Manning, P.A.
인용정보
피인용 횟수 :
0인용 특허 :
125
초록▼
A process for reducing the permeability of a paper wrapper used in the construction of a smoking article is disclosed. The paper wrapper is treated with a film-forming composition that forms treated discrete areas on the wrapper. The treated discrete areas have a permeability within a predetermined
A process for reducing the permeability of a paper wrapper used in the construction of a smoking article is disclosed. The paper wrapper is treated with a film-forming composition that forms treated discrete areas on the wrapper. The treated discrete areas have a permeability within a predetermined range sufficient to reduce the ignition proclivity properties of a smoking article made with the wrapper. In accordance with the present invention, the film-forming composition contains a film-forming material. The film-forming material has a relatively low viscosity. In this manner, the film-forming composition can have a relatively high solids content and still be applied to the wrapper using conventional techniques, such as by using a gravure printer.
대표청구항▼
1. A process for producing a paper wrapper having reduced ignition proclivity characteristics when incorporated into a smoking article comprising: applying a film-forming composition to a paper wrapper at particular locations, the paper wrapper comprising a paper web containing a filler, the paper w
1. A process for producing a paper wrapper having reduced ignition proclivity characteristics when incorporated into a smoking article comprising: applying a film-forming composition to a paper wrapper at particular locations, the paper wrapper comprising a paper web containing a filler, the paper wrapper having a basis weight of from about 18 gsm to about 60 gsm, said film-forming composition forming treated discrete areas on said wrapper, the treated areas being separated by untreated areas, the treated discrete areas having a BMI of less than about 5 cm−1, the film-forming composition comprising a film-forming material contained in the composition in an amount sufficient for the composition to have a solids content of at least 6% by weight, the film-forming material having a molecular weight such that the film-forming material has a viscosity of less than about 500 cP when present in a 3% by weight aqueous solution at 25° C., the treated areas having a permeability up to about 40 Coresta, the treated areas reducing ignition proclivity of a cigarette incorporating the wrapper, the untreated areas of the paper wrapper having a permeability of about 55 Coresta to about 110 Coresta. 2. A process as defined in claim 1, wherein the film-forming material comprises an alginate. 3. A process as defined in claim 2, wherein the alginate is a sodium alginate. 4. A process as defined in claim 1, wherein the film-forming material is present in the composition such that the composition has a solids content of at least 10% by weight. 5. A process as defined in claim 1, wherein the film-forming material has a viscosity of less than about 250 cP when present in a 3% by weight solution at 25° C. 6. A process as defined in claim 1, wherein the film-forming material has a viscosity of less than about 100 cP when present in a 3% by weight solution at 25° C. 7. A process as defined in claim 1, wherein the film-forming material is a material selected from the group consisting of guar gum, pectin, polyvinyl alcohol, a cellulose derivative, starch, a starch derivative, and mixtures thereof. 8. A process as defined in claim 1, wherein the treated areas have a BMI of from about 1 cm−1 to about 5 cm−1. 9. A process as defined in claim 1, wherein the film-forming composition is printed onto the paper wrapper. 10. A process as defined in claim 9, wherein the film-forming composition is printed onto the paper wrapper in a multi-pass operation. 11. A process as defined in claim 1, wherein the treated areas comprise a plurality of discrete circumferential bands disposed longitudinally along the paper wrapper, the bands having a width of greater than 4 mm, the bands being spaced from each other from a distance of from about 10 mm to about 40 mm. 12. A process as defined in claim 1, wherein the film-forming composition is applied to the paper wrapper using gravure printing. 13. A process as defined in claim 1, wherein the film-forming composition is applied to the paper wrapper in the treated discrete areas in an amount up to about 30% by weight based upon the weight of the paper wrapper. 14. A process as defined in claim 1, wherein the treated discrete areas have a BMI of less than about 3 cm−1. 15. A process as defined in claim 1, further comprising the step of drying the paper wrapper after the film-forming composition has been applied. 16. A process as defined in claim 1, further comprising the step of incorporating the paper wrapper into a smoking article, the smoking article comprising a column of a smokable tobacco, the column of the smokable tobacco being surrounded by the paper wrapper. 17. A process as defined in claim 1, wherein the filler contained in the paper web comprises calcium carbonate or magnesium oxide, the filler being present in the paper web in an amount from about 10% by weight to about 40% by weight. 18. A process as defined in claim 1, wherein the film-forming composition comprises an aqueous composition. 19. A process as defined in claim 1, wherein the film-forming composition has a viscosity of greater than about 800 cP. 20. A process as defined in claim 1, wherein the film-forming composition has a viscosity of greater than about 1000 cP. 21. A process as defined in claim 1, wherein the film-forming material comprises starch or a starch derivative. 22. A process for producing a paper wrapper having reduced ignition proclivity characteristics when incorporated into a smoking article comprising: printing a film-forming composition on a paper wrapper at particular locations to form treated discrete areas on the wrapper, the paper wrapper comprised of a paper web, the paper web containing a filler, the treated discrete areas being separated by untreated areas, the treated discrete areas having a BMI within a range sufficient to reduce the ignition proclivity characteristics of a smoking article without causing the smoking article to self extinguish in a free burn state, the BMI of the treated discrete areas being less than about 5 cm−1, the film-forming composition comprising an aqueous solution containing an alginate, the solution containing the alginate in an amount so as to have a solids content of at least 8% by weight, the alginate having a molecular weight such that the film-forming material has a viscosity of less than about 250 cP when present in a 3% by weight aqueous solution at 25° C., the treated areas forming circumferential bands along the length of the paper wrapper when incorporated into a smoking article, the treated areas having a permeability of less than about 40 Coresta, the film-forming composition being applied to the paper wrapper in the treated areas in an amount of from about 2% to about 20% by weight based upon the weight of the wrapper, the untreated areas of the paper wrapper having a permeability of about 55 Coresta to about 110 Coresta. 23. A process as defined in claim 22, wherein the treated discrete areas have a BMI of less than about 3 cm−1. 24. A process as defined in claim 22, further comprising the step of incorporating the paper wrapper into a smoking article, the smoking article comprising a column of a smokable tobacco, the column of the smokable tobacco being surrounded by the paper wrapper. 25. A process as defined in claim 22, wherein the film-forming composition has a viscosity of greater than about 800 cP. 26. A process as defined in claim 22, wherein the film-forming composition has a viscosity of greater than about 1000 cP. 27. A process as defined in claim 22, wherein the treated areas comprise a plurality of discrete circumferential bands disposed longitudinally along the paper wrapper, the bands having a width of greater than 4 mm, the bands being spaced from each other from a distance of from about 10 mm to about 40 mm. 28. A process as defined in claim 22, wherein the film-forming material comprises starch or a starch derivative.
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이 특허에 인용된 특허 (125)
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