Classifications

• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/18—Treatment of tobacco products or tobacco substitutes
  • A24B15/24—Treatment of tobacco products or tobacco substitutes by extraction; Tobacco extracts
• • A—HUMAN NECESSITIES
  • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
  • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
  • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
  • A24B15/10—Chemical features of tobacco products or tobacco substitutes
  • A24B15/12—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco

Definitions

• a smoking material comprises a tobacco component consisting of or comprising a combustible reconstituted tobacco of a type which consists solely or essentially of natural tobacco substances, which smoking material contains more than 10 percent by weight of a filler intimately incorporated therein and consisting solely or substantially solely of chalk.
• the carbonate addition is applied in the particulate form and of a particle size less than 150 microns. Adhesion between the carbonate and the tobacco is effected by substances released by the tobacco, per se.
• the reconstituted tobacco may contain added tobacco extract as well as tobacco solids.
• the sheet was shredded to a form smokable in cigarettes and cigarettes prepared from the shreds were smoked on a conventional machine at l puff per minute of 35 ml volume and 2 seconds duration.
• the cigaret te dimensions were length 70 mm and circumference 25 mmf
• the cigarette weight was 1,100 i 40 mg for series A and 930 i 50 mg for series B.
• the particle size of the chalk powder is preferably less than 150 microns.
• Reconstituted tobaccos of the type set forth are characterised essentially by the absence of extraneous adhesives, binding being achieved by substances of, or released frorn, natural tobacco. Such reconstituted tobaccos are also to be distinguished from those in which the originating material is pulped chemically, using nitric acid or caustic soda for example.
• a first Example illustrates the application of the invention to a reconstituted tobacco of the kind sometimes known as paper reconstituted tobacco, in which an aqueous slurry of tobacco solids is formed into a continuous web on a Fourdrinier-type machine.
• the reconstituted tobacco was prepared in the following manner:
• Threshed Burley stem was cooked at 9095 C for three 30 minute periods, with a stem/water ratio of l to 10 by weight, followed by draining after each cook.
• the fibrous residue was then passed through a disc mill at 16.5 percent consistency, the clearance between the plates being 0.035 inches,-this being followed by heating in a conventional Valley beater for minutes at 2 percent consistency.
• the resultant stock was diluted to 0.6 percent consistency and fed together with finely divided chalk, of which 90 percent was of a size that would pass a 325 British Standard mesh, to the headbox of a conventional Fourdrinier paper-making machine of the tissuepaper forming type. A continuous sheet with a final thickness of 0.1-3 to 0.23 mm was produced. Because of the low retentionof chalk, in relation to fibres, on the Fourdrinier wire, the ratio of chalk to fibres fed to the headbox will generally be two to three times the ratio required in the final sheet material.
• the minimum proportion that will give a disproportionate reduction will depend on the physical nature of the reconstituted tobacco material and its method of manufacture.
• the maximum proportion will be determined by the requirement that the smoking product, besides being of suffient mechanical strength for cigarette manufacture, must be combustible.
• a reconstituted tobacco is to be considered to be combustible, if a cigarette made wholly from it and produced in conventional manner does not require relighting on a majority of puffs when smoked to a 23 mm butt length under standard conditions, i.e., one puff per minute of 35 ml volume and two seconds duration. Thus, if such a cigarette takes a total of 10 puffs to smoke to a 23 mm butt length and does not have to be relit before any six puffs or more of those which are taken, the reconstituted tobacco is combustible.
• reconstituted tobacco with which the invention can be employed include that produced by the process described in US. Pat. specification No. 3,043,727, sometimes known as processed tobacco leaf, in which process tobacco-parts extracted with hot water and disintegrated are mixed, as binder, with tobacco fines such as lamina or midribs, the particle size I of the mixture is reduced and the resultant aqueous tobacco slurry is formed into a continuous sheet and dried on a stainless-steel band.
• the chalk was added together with the tobacco fines to the binder prepared from the water-extracted tobacco parts.
• Results obtained with reconstituted tobacco of this kind are tabulated below, the weight of the cigarettes in this case being 1,250 i 50 mg.
• a reconstituted tobacco product having a base of ground tobacco and an impregnation of calcium carbonate therein, the calcium carbonate constituting at least 14.6 percent of the reconstituted tobacco product, said calcium carbonate being added in particulate form and having a particle size of less than microns, the adhesion between the carbonate additive and the tobacco being effected by substance released from the tobacco during slurrying.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Manufacture Of Tobacco Products (AREA)
• Paper (AREA)
• Cigarettes, Filters, And Manufacturing Of Filters (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=10260942

Family Applications (1)

Country Status (12)

Cited By (6)

Families Citing this family (2)

Citations (7)

Family Cites Families (1)

• 1972
  • 1972-05-16 GB GB2752171A patent/GB1342029A/en not_active Expired
  • 1972-05-19 AU AU42523/72A patent/AU4252372A/en not_active Expired
  • 1972-05-19 ZA ZA723457A patent/ZA723457B/xx unknown
  • 1972-05-23 CA CA143,075A patent/CA958957A/en not_active Expired
  • 1972-05-24 US US00256409A patent/US3805802A/en not_active Expired - Lifetime
  • 1972-06-01 BE BE784271A patent/BE784271A/xx not_active IP Right Cessation
  • 1972-06-05 CH CH827472A patent/CH554651A/fr not_active IP Right Cessation
  • 1972-06-07 BR BR3647/72A patent/BR7203647D0/pt unknown
  • 1972-06-08 NL NLAANVRAGE7207770,A patent/NL174323C/xx not_active IP Right Cessation
  • 1972-06-08 DE DE2227831A patent/DE2227831C2/de not_active Expired
  • 1972-06-08 FI FI721626A patent/FI51891C/fi active
  • 1972-06-09 DK DK289372AA patent/DK130863B/da not_active IP Right Cessation

Patent Citations (7)

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