CO-AXIAL CIGARETTES
    Basic combustion research conducted at Imperial College, University of London in the early 1960s
    (1) suggested that tobacco in the periphery of the cigarette contributes more to mainstream smoke
    generation than tobacco in the core.
    *eriphery
    core
    Research published by Philip Morris in 1977 (2) confirmed this, and also suggested that tobacco in
    the core of the cigarette contributed more to sidestrearn smoke.
    Over the last 25 years, several studies in R&D, Southampton have attempted to find product
    opportunities from these implications. Work was undertaken in the late 1960s and in the 1980s (3)
    in which cigarettes I.Vith cc-axial tobacco rods were constructed with various materials, including
    the non-tobacco substitute Cytrel, placed in the core and periphery. In some studies the inner core
    was wrapped wit4 cigarette paper, in other studies it was not. Unfortunately, in all the work
    undertaken in Southampton no product advantages for either mainstream or sidestream smoke
    e,
    N were found. Further work in Southampton has therefore not been pursued.
    BATCF believe that co-axial cigarettes have product development advantages and have been
    actively involved in this area for some years. They have filed seven patent applications since 1987,
    with the cigarettes containing both co-axial tobac~o rods and co-axial filters. The patents describe
    a larg  gar
    ge combination of tobaccos, cig ette papers for the inner and outer cores, filtration
    efficiencies and filter ventilation levels. By optimising these design parameters in many ways, the
    patents claim variously- low mainstream smoke deliveries (tar and carbon monoxide), enhanced
    taste of low tar cigarettes, reduced sidestream and reduced ignition propensity.
    At the Research Policv Group Meeting in Germany in October 1990 (attended by CAC heads of
    R&D) it was minuted that people would be informed on BATCFs progress in this area on a need-
    to-know basis only. No information is available in Southampton, other than their patents.
    References
    1. Sir A. Egerton. K. Gugan and F.J. Weinberg
    Combustion and FlamL, 1963, 7, 63 -78.
    2. R.W. Jenkins Jr-, R.T. Bass. R_H_ Newman and M.K. Chavis,
    Beirr. Taba~-,brsch, 1977, 9, 126-130.
    40 3. BAT R&D Southampton Report Nos.:
    E. 114. 1 Jan. 1967
    RD 616F, 17 Oct. 1968
    L. 3 5 5, 23 Nov. 1970
    TM S:-05-024, 17 May 1982
    BAT Combustion Conference Report. 16 Dec. 1982
    T109K [2 May 1983
    RD 20_54. 26 Sept 1986
    RD :070, 4 March 1987
    R.R. Bik-er
    23.11.93
    Co
    BATCO CONMDENTIAL - CATEGORY 1: M1NjNESOTA TOBACCO LITTGATION.
    BATCo document for Legal Services : Health Canada 20 October 1999