EP0175684A1 - Traitement de papier a cigarettes. - Google Patents

Traitement de papier a cigarettes.

Info

Publication number
EP0175684A1
EP0175684A1 EP84901502A EP84901502A EP0175684A1 EP 0175684 A1 EP0175684 A1 EP 0175684A1 EP 84901502 A EP84901502 A EP 84901502A EP 84901502 A EP84901502 A EP 84901502A EP 0175684 A1 EP0175684 A1 EP 0175684A1
Authority
EP
European Patent Office
Prior art keywords
cigarette
paper
wrapper
porosity
burn rate
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.)
Granted
Application number
EP84901502A
Other languages
German (de)
English (en)
Other versions
EP0175684B1 (fr
EP0175684A4 (fr
Inventor
Charles C Cohn
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.)
COHN ROSE
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0175684A1 publication Critical patent/EP0175684A1/fr
Publication of EP0175684A4 publication Critical patent/EP0175684A4/fr
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Publication of EP0175684B1 publication Critical patent/EP0175684B1/fr
Expired legal-status Critical Current

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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
    • 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
    • A24D1/025—Cigars; Cigarettes with special covers the covers having material applied to defined areas, e.g. bands for reducing the ignition propensity

Definitions

  • This invention relates to the treatment of cigarette paper for fire resistance and for reduction of sidestream smoke, i.e. smoke emitted when the cigarette is not being puffed actively.
  • One object of this invention is to provide sidestream smoke reduction in a cigarette by a simple and inexpensive means and method which do not adversely affect the desirability of the cigarette to the smoker. Another object of the invention is to provide a fire-resistant cigarette which is simple and inexpensive to manufacture, while avoiding the undesirable characteristics of prior fire-resistant cigarettes. Another object of this invention is to impart both fire resistance and sidestream smoke reduction to a cigarette by a comparatively simple and inexpensive expedient, namely the use of a cigarette paper having special filler content and porosity characteristics, or by the treatment of cigarette paper with specially chosen chemical substances. It is also an object of this invention to achieve fire resistance and/or sidestream smoke reduction while maintaining a light colored cigarette ash.
  • Still another object of the invention is to achieve fire resistance and/or sidestream smoke reduction without impairing the external appearance of the cigarette. Still another object is to achieve fire resistance and/or sidestream smoke reduction without causing excessive particulates in the mainstream smoke, and without seriously affecting the draw characteristics of the cigarette. In general, it is an object of the invention to achieve fire resistance and/or sidestream smoke reduction in a cigarette which is likely to be acceptable in all respects to most cigarette smokers. Still another object of the invention is to reduce the nicotine and tar delivery of a cigarette.
  • One preferred cigarette in accordance with the invention for fire resistance and the reduction of sidestream smoke, comprises a charge of tobacco in a wrapper of cigarette paper having a Greiner porosity of about 50 or more seconds and a weight between about 10 and 35 grams per square meter.
  • the cigarette paper is substantially free of burn accelerator other than filler, and has a low filler content in the range of approximately 15 to 22%.
  • Cigarette paper meeting the above requirements has been used in the past for wrapping cigarette filters. However, it apparently has not been used as a consumable wrapper for cigarette tobacco. I have found that low-porosity cigarette paper meets all of the above-stated objectives of the invention except for reduction of particulates in the sidestream smoke.
  • low-porosity, low-filler content paper can be achieved by treatment of the paper in water, ethyl alcohol, or in a solution or suspension of one or more of a wide variety of linear burn rate-reducing substances, as will be discussed in detail below.
  • This specific class of burn rate-reducing substances comprises lactic acid, citric acid, magnesium citrate, magnesium acetate, tartaric acid, acetic acid, non-fat milk, skim milk and sugars. If only part of the area of this cigarette paper is treated, fire resistance and/or sidestream smoke reduction can be achieved while producing substantially less particulate matter than would be present in the mainstream smoke from a cigarette with a wrapper treated over its entire area.
  • sugars can be used as burn rate-reducers on conventional cigarette papers for fire resistance and sidestream smoke reductions, when used in high concentrations, they tend to cause cigarette paper to darken when subjected to heat. However sugars in relatively high concentrations are entirely acceptable for treating brown cigarette papers.
  • Cigarette paper is defined as a tissue paper made from a highly beaten flax pulp stock, the paper being substantially free of pin holes and substantially free of sizing.
  • Linear burn rate-reducing substance means any substance which, when applied to cigarette paper and dried, causes the cigarette paper to exhibit a lower static burn rate than the same paper in an untreated condition.
  • Such substances include citric acid, magnesium citrate, magnesium acetate, diammonium phosphate, trisodium phosphate, alumina gel, sodium tetraborate, ammonium hydroxide, nickel acetate, potato starch, sugar, aluminum stearate, manganese sulfate, ammonium sulfate, ammonium sulfamate, aluminum sulfate, acetic acid, lactic acid, and non-fat milk. Many other substances including sugars such as dextrose, maltose, sucrose, etc.
  • Burn rate-reducing substances have varying characteristics. All are applicable to low-porosity, low filler content cigarette paper. However, only a limited group of burn rate-reducers is applicable to conventional cigarette paper. The substances in this limited group which I have found produce good results are citric acid, magnesium citrate, magnesium acetate, tartaric acid, acetic acid, lactic acid, non-fat milks, skim milk, maltose, dextrose, sucrose, fructose and lactose.
  • Filler means calcium carbonate (CaCO 3 ) or any other substances used in the cigarette industry for the purpose of accelerating burning of paper. MgCO 3 and MgO are examples of other fillers which have been used.
  • Greiner porosity is a measure of cigarette paper porosity used throughout the cigarette industry. It refers to the time in seconds required for a specified volume of air to pass through a specified area of paper under a specified pressure. The higher the Greiner number, the lower the porosity of the paper.
  • Sidestream smoke is smoke emitted by a cigarette between puffs. This smoke does not pass through the tobacco rod or through the filter, and is considered particularly obnoxious by non-smokers.
  • the cigarette In testing for sidestream smoke, the cigarette is lit, puffed, held for one minute without puffing, and then puffed again. It is then placed under an inverted, widemouth glass jar three inches in diameter and seven inches tall. Sidestream smoke is evaluated by visually observing the quantity of smoke in the jar.
  • “Tar” refers to the liquid products of tobacco combustion, and is evaluated by observing the staining of the mouth end of a cigarette filter.
  • Drying refers to the removal of moisture or liquid substances by the application of heat, by the application of moving air, by simply permitting evaporation to take place under ambient conditions, or by any other suitable means. However, “drying” does not imply the removal of all moisture. Rather, in the context of the following description, “drying” refers to the removal of moisture after treatment of cigarette paper to an extent such that the cigarette paper has substantially the same moisture content that it had prior to treatment.
  • the "fire resistance test” referred to herein is a test described in the United States Federal Trade Commission's Standard for the Flammability of Mattresses and Mattress Pads (FF 4-72), (16 C.F.R. 1632).
  • the Federal Trade Commission's test is intended for testing mattresses using conventional cigarettes. However, the test is equally applicable to the testing of cigarettes using standard mattresses, and a test on a standard mattress was used to determine the fire resistance of the cigarettes described in the examples herein.
  • the mattress material used is a cotton trcking covering a cotton batting. The lit cigarette, after at least 30 seconds of free burn time in air, is placed horizontally over the mattress ticking, with uniform contact of the cigarette paper with the ticking.
  • the cigarette is permitted to burn until it self-extinguishes before full consumption, in which case it is relit and retested. It may burn its full length and then self-extinguish.
  • the cigarette is observed to determine whether or not it causes smoldering or ignition of the test mattress.
  • the tests used to determine fire resistance and other parameters reported in the examples herein were carried out on cigarettes made by factory-type machines or on cigarettes made by hand using careful controls to insure a uniform tobacco packing density similar to that of a factory-made cigarette.
  • a cigarette in accordance with the invention must burn for at least one minute between puffs.
  • the linear burn rate must be between about 1 and 6 mm/minute.
  • the linear burn rate must be substantially slower than the burn rate of a corresponding cigarette which has an untreated wrapper but which is otherwise identical to the cigarette having the treated wrapper. For example if an untreated cigarette has a burn rate of 5 mm/minute, a corresponding cigarette with a water-treated wrapper should be treated sufficiently to have a burn rate substantially less than 5 mm/minute, e.g. 4 mm/minute.
  • treated cigarettes will generally exhibit sidestream smoke reduction at a burn rate of 6 mm/minute or less, and some of the same cigarettes will also exhibit fire resistance at a burn rate anywhere in the range of 1 to 6 mm/minutes, other cigarettes must be treated sufficiently to have a burn rate as low as 3.5 mm/minute in order to have satisfactory fire resistance.
  • An important phase of this invention pertains to the use of a low porosity cigarette wrapper having a relatively low filler content.
  • the wrappers of conventional cigarettes have a Greiner porosity in the range of about 10 to 40 seconds, and a filler content (usually calcium carbonate, magnesium carbonate or magnesium oxide) in the range of approximately 22 to 35%
  • a filler content usually calcium carbonate, magnesium carbonate or magnesium oxide
  • one of the preferred cigarettes in accordance with this phase of the invention uses a wrapper having a Greiner porosity of about 50 or more seconds, and a filler content in the range of approximately 15 to 22%.
  • the weight of the cigarette paper should be between about 10 and 35 grams per square meter as in the case of conventional cigarette paper.
  • a typical paper having these characteristics is the so-called "plug wrap", which is used as a wrapper for cigarette filters, but has not been used as a wrapper for tobacco.
  • a cigarette having a wrapper consisting of such paper exhibits excellent fire resistance. When dropped on a test mattress, it may cause some charring, but does not start a smolder or fire, .and eventually extinguishes itself.
  • the cigarette tested was a "Winston-Lights" king size cigarette having an average circumference of approximately 25 mm.
  • the tested cigarettes were made from conventional cigarettes by removing the tobacco and wrapper from the filter plug, wrapping the low-porosity paper around the filter to form a tube, sealing the tube edges together, and carefully repacking the same tobacco in the tube to insure uniform tobacco density similar to that of the original cigarette.
  • the paper was chemically treated, it was treated before replacement of the tobacco.
  • the following four examples pertain to "Winston-Lights" kingsize cigarettes comprising tobacco wrapped in low-porosity, low-filler content cigarette paper.
  • the weight given refers to the weight of the paper, including the calcium carbonate filler, in grams per square meter.
  • the porosity is the Greiner porosity in seconds.
  • Cigarettes made in accordance with all of the foregoing examples exhibit substantially improved fire resistance when subjected to the fire resistance test described above. However, these cigarettes do not exhibit a substantial reduction in sidestream smoke.
  • the lower calcium carbonate content in EXAMPLE 1 resulted in a little less charring of the test fabric than EXAMPLES 2, 3 and 4. I have found that the weight of the paper has little effect on its performance.
  • the calcium carbonate content of the paper is below approximately 15%, the cigarette does not burn for one minute, a minimum of one minute of burning under static conditions being an essential criterion for a satisfactory cigarette. If the calcium carbonate content substantially exceeds 22% in this low-porosity paper, the fire resistance of the paper is impaired.
  • Cigarettes in accordance with EXAMPLES 1 through 4 inclusive are simple to manufacture by conventional cigarette-making machinery, inasmuch as the only difference between these new cigarettes and conventional cigarettes is in the nature of the paper used to wrap the tobacco.
  • a cigarette using a low-porosity wrapper with a low filler content has the further advantage that it burns more slowly than a conventional cigarette, and therefore consumes less tobacco in a given number of puffs. It is not known whether or not any health benefits result directly from the reduced rate of consumption of tobacco. However, the reduction in tobacco consumption makes it possible to use less tobacco in a cigarette of a given length, and to provide a longer and more effective filter.
  • low-porosity paper with a low filler content improves fire resistance, it has comparatively little effect on sidestream smoke production.
  • it is a simple matter to reduce sidestream smoke to very low levels by treating paper having low porosity and low filler content with water or ethyl alcohol, and thereafter drying the paper.
  • a cigarette so treated meets the necessary burning criteria in that it burns for at least one minute without puffing, and has a linear burn rate in the range of about 1-6 mm. per minute.
  • Treatment of cigarette paper with water or ethyl alcohol is carried out simply by running the cigarette paper over and under rollers into a water or alcohol bath, and from there to a dryer which eliminates excess moisture or liquid content, bringing the moisture content of the cigarette paper back to its approximate original level.
  • the following two examples pertain to the treatment of low-porosity cigarette paper with water or ethyl alcohol.
  • Depositing a linear burn rate reducing substance in or on the paper further improves fire resistance and, in some cases, also produces a further reduction in sidestream smoke.
  • Deposition of the linear burn rate reducing substance can be carried out most conveniently, using a method similar to EXAMPLE 5, by dissolving or suspending the substance in the water in which the cigarette paper is soaked.
  • a wide variety of substances can be used to reduce the linear burn rate of low-porosity cigarette paper. Examples of suitable treatments include the following. In each case, the weight of the cigarette paper was 27 g./m 2 , its CaCO 3 content was 18.5%, and its porosity was 50 seconds. The paper was soaked in an aqueous solution of the linear burn rate-reducing substance, and allowed to dry before wrapping the tobacco.
  • linear burn rate reducing substances which can be applied to low-porosity cigarette paper from an aqueous solution.
  • these include, for example, trisodium phosphate, disodium phosphate, diammonium phosphate, phosphoric acid, sulfuric acid, sodium hydroxide, borax, boric acid, ammonium hydroxide, nickel acetate, sodium silicate, ammoni um sulfate , ammoni um sulfamate and sodi um dichromate.
  • These substances should be applied in low concentrations, i.e. of the order of 1%, as higher concentrations tend to produce a darkening of the cigarette ash.
  • any of the burn rate-reducing substances can be applied in very low concentrations by multiple treatment steps. That is the paper is soaked in a solution containing a low concentration of a burn rate reducing substance, allowed to dry, then soaked again in the same or another solution of a burn rate-reducing substance, and again allowed to dry.
  • Non-fat milk is also effective as a linear burn rate reducer for reducing charring of the material used in the fire resistance test.
  • Non-fat milk can be conveniently applied as a suspension of non-fat dry milk in water.
  • a typical analysis of non-fat dry milk (Carnation brand) is as follows:
  • Cigarette paper with a Greiner porosity of 50 seconds, a weight of 27 g./m 2 and a CaCO 3 content of 18.5% was treated on one side in a suspension consisting of about 1% by weight of non-fat dry milk in water, and allowed to dry. This treatment leaves a glaze on the treated side of the paper.
  • the cigarette using the treated paper produced noticeably less charring and no smoldering of the test material than did a similar cigarette using untreated paper.
  • the concentration of non-fat dry milk can range from about 1% to about 20%, although higher concentrations within this range are not necessary. If a glazed appearance is not desired on the outside of the cigarette wrapper, the milk suspension can be applied to the side of the wrapper which ultimately faces toward the tobacco. Alternatively, both sides of the paper can be treated. Instead of non-fat dry milk, skim milk diluted with water can be used with equivalent effect.
  • Various insoluble linear burn rate reducing substances other than milk can be applied in a suspension. Examples of such substances are alumina gel, potato starch and aluminum stearate. A typical aqueous suspension of one of these substances contains about 1% by weight of the substance. When applied to low-porosity cigarette paper, these substances provide improved resistance to charring and smoldering as well as some sidestream smoke reduction.
  • the cigarette paper had a Greiner porosity of 20 seconds, a weight of 24 g./m 2 , and a CaCO 3 content of 25%. The paper was soaked in the indicated treating solution and allowed to dry.
  • EXAMPLES 14-37 comparatively low concentrations of burn rate reducing substances are effective to reduce sidestream smoke. If more of the burn rate reducing substance is used the cigarette becomes capable of passing the fire resistance test.
  • the following table indicates the approximate minimum concentrations of each substance to effect fire resistance, and to effect noticeable sidestream smoke reduction, assuming a paper having a Greiner porosity of 20 seconds, a weight of 24 g./m 2 and a CaCO 3 content of 25%, and assuming treatment is carried out by a single soaking step followed by drying:
  • milk can be used to treat high porosity cigarette paper to produce sidestream smoke reduction and fire resistance. Milk is applied to the cigarette paper by treating one or both sides of the paper in a suspension of milk in water.
  • cigarette paper having a Greiner porosity of 20 seconds, a weight of 24 g./m2 and a CaCO 3 content of 25% was treated in a single step by coating one side with a suspension of Carnation brand non-fat dry milk.
  • the paper was treated when separated from the tobacco.
  • the minimum concentration of milk necessary to pass the fire test is approximately 9.0%, assuming 20 second porosity, a weight of 24 g./m 2 and a CaCO 3 content of 25% in the paper. In the case of paper treated separately from the tobacco, the minimum concentration is approximately 7.0%. These minimum quantities will vary with porosity, amount of filler, cigarette diameter, tobacco type, additives, etc.
  • non-fat dry milk as a burn rate reducer has a number of advantages over the use of other burn rate reducers such as citric acid, magnesium citrate, etc.
  • the treated cigarette has a better appearance, and is smoother and easier to remove from the pack. It is resistant to moisture and has a longer shelf life, and its paper is more flexible than other treated papers. Furthermore, the paper retains its strength while wet during treatment with the non-fat dry milk suspension.
  • the paper is treated with a burn ratereducing substance
  • These steps are especially desirable where the burn rate-reducing substance is in suspension or in solution in a relatively high concentration such as to form a visible deposit on the paper.
  • These steps are also desirable because, with the treated side toward the tobacco, there is less tendency for. the burn ratereducing substance to affect the color of the cigarette ash.
  • Higher concentrations of burn rate reducers can be used when the treated side of the paper is toward the tobacco. This method of treatment produces more effective smoke reduction and more effective fire resistance without materially affecting the appearance of the cigarette or its ash.
  • EXAMPLE 44 This example is similar to EXAMPLE 42 except that only 50% of the surface area of the wrapper was treated with citric acid in three longitudinal stripes 4.5 mm. wide. This cigarette did not pass the fire resistance test, and the reduction in sidestream smoke was not noticeable.
  • EXAMPLE 47 This example is similar to EXAMPLE 45 except that only 54% of the area of the wrapper was treated with citric acid in evenly spaced longitudinal stripes 4.5 mm. wide. This cigarette passed the fire resistance test but did not exhibit an appreciable reduction in sidestream smoke.
  • EXAMPLE 48 This example is similar to EXAMPLE 45 except that the citric acid concentration was only 9.09%. The cigarette exhibited a substantial reduction in sidestream smoke, but did not pass the fire resistance test.
  • EXAMPLE 49 This example is similar to EXAMPLE 45 except that the citric acid concentration was 9.09% and the area of coverage was 75%, the treated areas being in a longitudinal stripe 18.7 mm. wide with a 6.3 mm. space. This cigarette failed the fire resistance test, and did not exhibit an appreciable reduction in sidestream smoke.
  • EXAMPLES 42-49 indicate that fire resistance and sidestream smoke reduction can be achieved with only partial coverage of the cigarette wrapper, provided that a sufficient concentration of citric acid is used and provided that the ratio of treated area to total wrapper area is sufficient. Concentration and area ratio are interrelated in that a high concentration of burn rate reducer is effective when applied over a comparatively small part of the total wrapper area, whereas lower concentrations of burn rate reducers can also be effective if a larger portion of the total wrapper area is treated.
  • Partial area treatment reduces paper porosity only in the treated areas, leaving untreated areas with their porosities unaffected so that air passes through the paper into the smoke stream within the cigarette to control the amount of tars, nicotine and carbon monoxide in the smoke delivered to the smoker with each puff of the cigarette.
  • Treatment with milk as a burn rate reducer is different in that high concentrations of milk, while producing good fire resistance, tend to cause more sidestream smoke than intermediate concentrations.
  • the following table of examples illustrates this result in a high tar cigarette.
  • cigarette paper having a porosity of 20 seconds, a weight of 24 g/m 2 , and a CaCO 3 content of 25% was treated with Carnation non-fat dry milk in suspension by applying the suspension to the paper in evenly spaced longitudinal stripes 4.5 mm. wide separated by untreated areas 3.8 mm. wide.
  • EXAMPLES 50-61 the paper was treated while surrounding the tobacco of the cigarette.
  • Examples of multiple-step treatments include the following: EXAMPLE 74 Cigarette paper for a low tar cigarette, with a Greiner porosity of 20 seconds, a weight of 24 g/m 2 and a CaCO 3 content of 25% was treated by applying a suspension of about 13% non-fat dry milk over 54% of the area of the paper on one side in evenly spaced longitudinal stripes 4.5 mm. wide with a spacing of 3.8 mm. Following drying, the opposite side of the paper was treated with a suspension of about 1% non-fat dry milk. The results were very similar to those produced in EXAMPLE 59. The partially treated side was toward the tobacco.
  • Cigarette paper in a low tar cigarette with a Greiner porosity of 20 seconds, a weight of 24 g/m 2 and a CaCO 3 content of 25% was treated by applying a suspension of 13% non-fat dry milk to one side of the paper in evenly spaced longitudinal stripes 4.5 mm. wide with a spacing of 3.8 mm. Following drying, the same side of the paper was treated with a 2.8% of non-fat dry milk over its entire area. The cigarette was formed with the treated side of the paper on the outside. Sidestream smoke reduction was satisfactory, but the cigarette failed the fire resistance test.
  • Treatment was the same as in EXAMPLE 75 except that the concentration of the suspension in the second step was 4.8%. Sidestream smoke reduction was satisfactory, and the cigarette passed the fire resistance test.
  • EXAMPLE 77 Treatment was the same as in EXAMPLES 75 and 76 except that the concentration in the first step was 11.1% and in the second step was 6.99%. Sidestream smoke reduction was even better than in EXAMPLES 75 and 76 and fire resistance was better than EXAMPLE 76 in that charring of the test material was noticeably less.
  • the following examples pertain to multiple treatments of cigarette paper with solutions of magnesium acetate.
  • Cigarette paper in a low tar cigarette with a Greiner porosity of 20 seconds, a weight of 24 g/m 2 and a CaCO 3 content of 25% was treated by applying a solution of 20% magnesium acetate in longitudinal stripes 4.5 mm. wide with a spacing of 3.8 mm., i.e. over 54% of the wrapper area. Following drying, a 9% solution of magnesium acetate was applied to the same side of the paper over its entire area. The cigarette was formed with the treated side of the paper on the outside. This cigarette failed the fire resistance test, but exhibited satisfactory sidestream smoke reduction.
  • EXAMPLE 79 Treatment was the same as in EXAMPLE 78 except that the concentration in the partial coverage step was 20% and the concentration in the full coverage step was 13% . This cigarette exhibited satisfactory sidestream smoke reduction and passed the fire resistance test. The difference between EXAMPLES 78 and 79 is that EXAMPLE 78's second step used 9.9% magnesium acetate and the cigarette did not pass the fire resistance test. EXAMPLE 79 increased the concentration in the second step to 13%, and the cigarette passed both sidestream and fire resistance tests.
  • Cigarette paper in a low tar cigarette with a Greiner porosity of 20 seconds, a weight of 24 g/m 2 , and a CaCO 3 content of 25% was treated by applying a solution of 26% magnesium acetate to one side of the paper in longitudinal lines 4.5 mm. wide with a 3.8 mm. spacing. Following drying the opposite side of the paper was treated by applying a solution of 9.9% over its entire area. The cigarette was formed with the partially treated side toward the tobacco. This cigarette exhibited satisfactory sidestream smoke reduction and passed the fire resistance test. Sugars can be used as burn rate-reducers as illustrated by the following table of examples.
  • the paper porosity was 20 seconds
  • the CaCo 3 content was 25%
  • the weight of the paper was 24 g/m 2 .
  • the entire area of the paper was soaked in an aqueous solution of the designated sugar in the concentration indicated. The paper was then allowed to dry, and fire resistance and sidestream smoke tests were carried out.
  • the paper was treated while surrounding the tobacco.
  • the paper was treated while separate from the tobacco.
  • the cigarette produced a white ash with an acceptable appearance.
  • the practical upper limit for sugar concentration is about 60%, because highly concentrated sugar solutions are hard to dry and tacky.
  • sucrose in concentrations in excess of the 23% concentration in EXAMPLE 83A, the paper became discolored adjacent to the burning coal.
  • the same discoloration has been observed with high concentrations of maltose.
  • the problem of discoloration can be avoided by using mixtures of sucrose and other burn rate retardants, e.g. 15.7% sucrose and 5.88% citric acid, or by applying sucrose in two separate treatment steps, e.g. 7% sucrose in each step, with drying following each step.
  • Sucrose can be applied in an alcohol solution, in which case good results can be achieved using comparatively low concentrations, e.g. 11.2% sucrose in 94.4% ethyl alcohol.
  • Cigarette paper for a low tar cigarette having a porosity of 20 seconds, a CaCO 3 content of 25% and a weight of 24 g/m 2 was treated with a solution of 50% dextrose over 75% of its area in longitudinal stripes 6 mm. wide with 2 mm. spacings between them. The paper was dried and then treated over its entire area with a 33% solution of sucrose and again dried. A cigarette with the treated paper as a wrapper exhibited good sidestream smoke reduction and passed the fire resistance test.
  • EXAMPLE 89 This example is similar to EXAMPLE 88 except that maltose was used instead of dextrose. The results were similar to those in EXAMPLE 88.
  • EXAMPLE 90
  • the treatment was similar to that in EXAMPLES 88 and 89 except that the treating solution in both steps was 33 1/3% sucrose. The results were similar to those in EXAMPLES 88 and 89.
  • the lower concentration limit for each of the treatment steps in multiple treatments using sugars is dependent on the concentration in the other step. However, in general the lower limit of concentration for the partial treatment step is about 30% while the lower limit of concentration for the full treatment step is around 20%.
  • An additional layer of conventional cigarette paper can be used to improve the performance of a cigarette using low-porosity paper or of a cigarette using treated high-porosity paper. The use of an additional layer of cigarette paper in a cigarette having low-porosity paper is illustrated by the following example:
  • an additional wrapper also improves the performance of a cigarette having specially treated cigarette paper as illustrated by the following example: EXAMPLE 92
  • the inner wrapper consisted of cigarette paper having a porosity of 20 seconds, a weight of 24 g/m 2 and a CaCO 3 content of 25%, soaked in a 4.5% solution of magnesium citrate (Mg 3 (C 6 H 5 O 7 ) 2 ).
  • the outer wrapper consisted of similar paper without magnesium citrate. The outer wrapper and inner wrapper were in close contact with each other. This cigarette produced good fire resistance and good sidestream smoke reduction.
  • the outer wrapper has the effect of reducing the concentration of the burn ratereducing substance required to achieve fire resistance and sidestream smoke reduction.
  • an additional wrapper improved the performance of cigarettes using burn rate-reducing substances other than magnesium citrate.
  • the treated wrapper can be placed on the outside, and the untreated wrapper on the inside without materially affecting the performance of the cigarette.
  • An additional wrapper can be used with a cigarette the wrapper of which is treated. over part of its area as described above, with similar improved results.
  • burn rate reducers in the group consisting of citric acid, magnesium citrate, magnesium acetate, tartaric acid, acetic acid, lactic acid, a sugar, or a suspension of non-fat milk or skim milk the concentrations of these primary burn rate reducing substances can be reduced without impairing performance if other burn rate reducing agents are present.
  • Examples of applicable burn rate reducing agents which may be added are monoammonium phosphate, diammonium phosphate, ammonium sulfamate, boric acid, and sulfamic acid.
  • burn rate reducers in the primary group consisting of citric acid, magnesium citrate, magnesium acetate, tartaric acid, acetic acid, lactic acid, a sugar, or a suspension of non-fat milk or skim milk.
  • Examples of applicable burn rate reducing agents which may be added are monoammonium phosphate, diammonium phosphate, ammonium sulfamate, boric acid, and sulfamic acid.
  • a "Winston Lights" cigarette wrapper was coated over its entire area with aqueous solution comprising 12% citric acid and 8% sucrose.
  • the slower burn rate of the cigarette resulting from the treatment of the wrapper made it possible to reduce the length of the tobacco rod by 10 mm. from 53 mm. to 43 mm., and to increase the length of the filter by 10 mm. from 22 mm. to 32 mm.
  • the original cigarette produced 8 puffs
  • the new cigarette produced 10 puffs. It passed the fire resistance test. Sidestream smoke from the new cigarette was faintly visible. Ash coloration, puff volume and draw characteristics were similar to those of the original cigarette, and the taste was somewhat milder.
  • the free burn time of the new cigarette was about 3 minutes, and the linear burn rate was about
  • EXAMPLE 94 Another Winston Lights cigarette wrapper was treated over its entire area with an aqueous solution of 3% magnesium citrate and 12.2% citric acid. This cigarette produced low sidestream smoke and good fire resistance.
  • the tobacco rod was 15 mm. shorter than that of a conventional Winston Lights cigarette, while the filter was 15 mm. longer.
  • the cigarette produced 14 puffs. Taste was satisfactory. Ash coloration, puff volume and draw characteristics were similar to those of the original cigarette.
  • the free burn time was approximately 3 minutes and the linear burn rate was 1.7 mm. /minute.
  • EXAMPLE 95 A Rothman Filter King cigarette was treated by removing the tobacco, applying to the entire surface of the empty wrapper a mixture consisting of 4.2% Carnation brand non-fat dried milk and 2.34% powdered sucrose in water, allowing the paper to dry, and replacing the tobacco.
  • the tobacco rod was 58 mm. in length and the filter and tipping paper took up 25 mm.
  • the dry weight gain of the paper was 5 mg.
  • the cigarette exhibited normal paper color and adequate draw characteristics.
  • the paper was slightly glazed on its surface, and was somewhat stiffer than the untreated paper.
  • the ash was firm and capable of being flicked off normally.
  • the cigarette exhibited excellent fire resistance, leaving only a stain on cotton fabric in the fire resistance test.

Landscapes

  • Paper (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Abstract

Une version d'une cigarette résistante au feu comporte une charge de tabac dans un papier de gainage à faible porosité essentiellement exempt d'accélérateur de combustion. Il est possible de réduire l'écoulement latéral de fumée de cette cigarette en traitant le papier de gainage avec de l'eau ou de l'alcool éthylique. On améliore en outre la résistance au feu en déposant sur le papier une substance réduisant la vitesse de combustion linéaire, appartenant au groupe comprenant l'acide citrique, le citrate de magnésium, l'acétate de magnésium; l'acide tartarique, l'acide acétique, l'acide lactique, un sucre, le lait non gras et le lait écrémé. On obtient des résultats similaires avec un milieu conventionnel pour des papiers à cigarettes à haute porosité en traitant ceux-ci avec une substance réduisant la vitesse de combustion appartenant au même groupe. Dans le cas de papier à cigarettes à haute porosité, si une partie seulement de la zone superficielle est traitée, la porosité des zones non-traitées régule l'alimentation en goudron, en nicotine et en oxyde de carbone. Il est en outre possible d'obtenir d'autres améliorations dans la réduction de l'écoulement latéral de la fumée et la résistance au feu en utilisant une couche supplémentaire de papier à cigarettes à haute porosité dans le papier de gainage.
EP84901502A 1983-01-24 1984-03-14 Traitement de papier a cigarettes Expired EP0175684B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US46042383A 1983-01-24 1983-01-24

Publications (3)

Publication Number Publication Date
EP0175684A1 true EP0175684A1 (fr) 1986-04-02
EP0175684A4 EP0175684A4 (fr) 1986-07-23
EP0175684B1 EP0175684B1 (fr) 1989-08-16

Family

ID=23828648

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84901502A Expired EP0175684B1 (fr) 1983-01-24 1984-03-14 Traitement de papier a cigarettes

Country Status (5)

Country Link
EP (1) EP0175684B1 (fr)
JP (1) JPS61501546A (fr)
AU (2) AU2813184A (fr)
CA (1) CA1211021A (fr)
WO (1) WO1985004080A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69007791T2 (de) * 1989-06-02 1994-08-18 Rothmans Benson & Hedges Zigarette mit verminderter seitenströmung des rauches.
NO177624C (no) * 1989-10-31 1995-10-25 Philip Morris Prod Papirhylster for en rökeartikkel og anvendelse av dette
US5094253A (en) * 1990-01-05 1992-03-10 Brown & Williamson Tobacco Corporation Dye for coloring cigarette paper
US5168884A (en) * 1991-04-12 1992-12-08 Philip Morris Incorporated Smoking articles using novel paper wrapper
GB9122935D0 (en) * 1991-10-30 1991-12-18 Rothmans Benson & Hedges Novel cigarette system
US5254092A (en) * 1992-09-15 1993-10-19 American Medical Systems, Inc. Fluid flow check valve
TR26626A (tr) * 1992-12-18 1995-03-15 Rothmans Benson And Hedges Inc Yeni cok icimli sigara sistemi.
TR28750A (tr) * 1992-12-18 1997-02-28 Rothmans Benson & Hedges Münferit sigaralarin, kismen icilmesi, söndürülmesi ve ondan sonra tekrar icilmesine, müsaade eden yeni bir sigara strüktürü.
AU9156701A (en) 2000-09-18 2002-04-02 Rothmans Benson Low sidestream smoke cigarette with combustible paper
US6779530B2 (en) * 2002-01-23 2004-08-24 Schweitzer-Mauduit International, Inc. Smoking articles with reduced ignition proclivity characteristics
RU2004133892A (ru) 2002-04-22 2005-08-10 Ротманс, Бенсон Энд Хеджиз, Инк. (Ca) Низковоспламеняемая сигарета, имеющая в сигаретной обертке окись металла в качестве донора кислорода
PH12014000291B1 (en) 2013-10-31 2016-05-02 Glatz Julius Gmbh Tobacco product wrapping material with controlled burning properties
ES2683321T3 (es) 2014-01-24 2018-09-26 Reemtsma Cigarettenfabriken Gmbh Cigarrillo con filtro
KR101926724B1 (ko) 2017-08-10 2019-03-07 주식회사 케이티앤지 저발화성 궐련지의 코팅 조성물, 이를 이용하는 담배, 그리고 저발화성 궐련지의 제조방법

Citations (5)

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Publication number Priority date Publication date Assignee Title
DE400863C (de) * 1922-09-01 1924-08-23 Otto Paul Koehre Verfahren zur Herstellung von Zigarettenpapier
GB514605A (en) * 1937-05-21 1939-11-13 Akciova Spolecnost Pro Prumysl A method of impregnating cigarette paper and cigarette sleeve tips and linings
US2738791A (en) * 1951-08-30 1956-03-20 Ecusta Paper Corp Cigarette paper
US3633589A (en) * 1970-02-27 1972-01-11 Wilhelm Kahane Cigarette having composite wrapper construction
US4453553A (en) * 1983-01-24 1984-06-12 Cohn Charles C Treatment of cigarette paper

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BE791758A (fr) * 1971-11-24 1973-05-22 Olin Corp Enveloppe chargee de carbone pour article a fumer et article a fumer presentant une telle enveloppe
JPS4941600A (fr) * 1972-08-28 1974-04-18
US4044778A (en) * 1973-09-10 1977-08-30 Cohn Charles C Cigarettes
US4129134A (en) * 1975-04-14 1978-12-12 Philip Morris Incorporated Smoking article
US4146040A (en) * 1977-03-17 1979-03-27 Cohn Charles C Cigarettes
US4231377A (en) * 1978-08-30 1980-11-04 Olin Corporation Wrapper for smoking articles containing magnesium oxide
JPS55114279A (en) * 1979-02-26 1980-09-03 Tokyo Pipe Co Ltd Tobacco controlling generation smoke * nicotine and tar
US4230131A (en) * 1979-03-09 1980-10-28 Eli Simon Self-extinguishing cigarettes
FI70366C (fi) * 1981-03-06 1986-09-19 British American Tobacco Co Tobaksprodukt

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
DE400863C (de) * 1922-09-01 1924-08-23 Otto Paul Koehre Verfahren zur Herstellung von Zigarettenpapier
GB514605A (en) * 1937-05-21 1939-11-13 Akciova Spolecnost Pro Prumysl A method of impregnating cigarette paper and cigarette sleeve tips and linings
US2738791A (en) * 1951-08-30 1956-03-20 Ecusta Paper Corp Cigarette paper
US3633589A (en) * 1970-02-27 1972-01-11 Wilhelm Kahane Cigarette having composite wrapper construction
US4453553A (en) * 1983-01-24 1984-06-12 Cohn Charles C Treatment of cigarette paper

Non-Patent Citations (1)

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Title
See also references of WO8504080A1 *

Also Published As

Publication number Publication date
EP0175684B1 (fr) 1989-08-16
EP0175684A4 (fr) 1986-07-23
WO1985004080A1 (fr) 1985-09-26
AU2813184A (en) 1985-10-11
CA1211021A (fr) 1986-09-09
JPS61501546A (ja) 1986-07-31
AU601091B2 (en) 1990-08-30
AU2656888A (en) 1989-03-23

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