Classifications

• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H5/00—Special paper or cardboard not otherwise provided for
  • D21H5/12—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials
  • D21H5/14—Special paper or cardboard not otherwise provided for characterised by the use of special fibrous materials of cellulose fibres only
  • D21H5/16—Tobacco or cigarette paper

Definitions

• fly ash small particles of partially burned paper, commonly called fly ash, will fall from a burning cigarette at frequent intervals. Sometimes theseparticles are not fully consumed, but are still burning when they land on carpets, upholstered furniture, the smokers clothing, or the like. They are, thus, a fire hazard and also a nuisance.
• a paper particularly suitable as a cigarette paper may be produced by treating the paper with sodium chloride, preferably in combination with a fire retarding compound, such as carboxymethyl cellulose. It has heretofore been proposed to treat cigarette paper with various materials including inorganic salts to decrease the inflammability of the paper. But when the sodium chloride is added to paper in an amount equal to 0.5 to 2% of the weight of the paper, it increases the burning rate of the paper. This increase, while not sufiicient to preclude the use of sodium chloride, might be objectionable and I, therefore, propose to add another material to the paper which will ofiset the acceleration of burning rate proposed by the salt addition without affecting the beneficial efiects of its additions. Various compounds may be used for this purpose. Thus, I propose to add about 0.2% of carboxymethylcellulose with the sodium chloride.
• the carboxymethylcellulose may be added in amounts from 0.1% to 1.0% by weight.
• Other materials which will offset the acceleration of burning rate when sodium chloride is added to the paper in the proportions stated are gum arabic, hydroxyethyl cellulose, locust bean, tragacanth, sodium alginate, Methocel X-2602 (a water soluble hydroxpropyl methylcellulose ether) and carboxymethyl hydroxyethyl cellulose. These may be used in the proportions stated above, that is, 0.1% to 1.0%.
• paper for use in cigarette manufacture was impregnated with substantially 1% of sodium chloride and substantially 0.2% of carboxymethylcellulose by means of rolls arranged approximately midway of the drying section of a paper-making machine.
• the solution is applied to one of the rolls by passing the roll through a tank in which it is placed, and the paper is then fed between the moistened roll and a second roll.
• concentration of sodium chloride and the retardent may be controlled by varying the strength of the solution. Where the paper is passed between a pair of rolls, one of the rolls is felt-covered. In this instance the concentration of the addition materials can be further controlled by adjustment of the roll-pressure.
• Paper treated as heretofore described forms a white ash as it burns, and this ash shrinks around the tobacco ash forming a solid band. It produces a more pleasing appearance than that produced by the dark gray ash which is formed when the cigarettes are made of untreated paper.
• the shrinkage of the paper ash strength ens the whole ash on the end of the cigarette and almost completely prevents the dropping of fly ash.
• the better burning qualities are the only noticeable difference between cigarettes made with the paper of the present invention and cigarettes made with other papers.
• the sodium chloride additions in amounts of from 0.5% to 2% by weight do not increase the burning rate a suflicient amount to require the retardent. But when it does, one of the retardents may be used in the amount necessary to reduce the burning rate to that of untreated paper.
• cigarettes made with sodium chloride impregnated paper produced a milder and more pleasant smoke than that of similar cigarettes made with untreated paper.
• a fire retardent selected from the group consisting of carboxymethylcellulose, gum arabic, hydroxyethyl cellulose, locust bean gum, gum tragacanth, sodium algmate, Methocel X-2602 (a water soluble hydroxypropyl methylcellulose ether) and carboxyrnethyl hydroxyethyl cellulose.
• the step which comprises adding not less than 0.5 and not more than 2% by weight of sodium chloride and not less than 0.1% and not more than 1% by Weight of a fire retardent select- 3 ed from the group consisting of carboxy mcthylcellulose, gum arabic, hydroxyethyl cellulose, locust bean gum, gum tragacanth, sodium alginate, Methocel X-2602 (a water soluble hydroxypropyl methylcellulose ether) and carboxymethyl hydroxyethyl cellulose to the paper.
• a fire retardent select- 3 ed from the group consisting of carboxy mcthylcellulose, gum arabic, hydroxyethyl cellulose, locust bean gum, gum tragacanth, sodium alginate, Methocel X-2602 (a water soluble hydroxypropyl methylcellulose ether) and carboxymethyl hydroxyethyl cellulose to the paper.

Landscapes

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

Priority Applications (9)

Applications Claiming Priority (1)

Publications (1)

Family

ID=23728074

Family Applications (1)

Country Status (8)

Cited By (11)

Families Citing this family (1)

Citations (7)

Family Cites Families (2)

• 0
  • NL NL196391D patent/NL196391A/xx unknown
  • NL NL103244D patent/NL103244C/xx active
  • BE BE537531D patent/BE537531A/xx unknown
• 1954
  • 1954-06-08 US US435359A patent/US2775970A/en not_active Expired - Lifetime
• 1955
  • 1955-04-04 GB GB9716/55A patent/GB768408A/en not_active Expired
  • 1955-04-18 FR FR1122773D patent/FR1122773A/fr not_active Expired
  • 1955-04-27 CH CH328762D patent/CH328762A/fr unknown
  • 1955-05-06 ES ES0221619A patent/ES221619A1/es not_active Expired
  • 1955-06-08 DE DEA22816A patent/DE1001107B/de active Pending

Patent Citations (7)

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