RESTRICTED
Reference No.
G3*02
Research Conference, Canada - August, 1982
GRrxDC Research Programme, 1982 1984
PROPOSED REVISIONS FOR 1983 1985
Work Area 02 Filters
General
The strategic objective and the various sub-areas are substantially
Unchanged.
The emphasis throughout is on the exploration of new filter concepts
and associated novel filter technology rather than the development of
new filters through to the mass production stage.
it will be noted that some items, particularly filters for reducing
nitrosamines, have been cross-referenced with Work Area 03, Nitros-
a-mines.
Programme Changes - Key Achievements
1. Selective filtration
During the last year, work on selective filtration has been limited to
discussions with Dr. J. Guthrie, an expert on polymer grafting onto
cellulose materials, of Leeds University. During 1982 to 1983 practical
experimental work will be carried out to produce laboratory samples of
modified cellulosic materials for the selective filtration of nitric
oxide, hydrogen cyanide and nitrosaimines (as agreed at the Technical
Exchange Meeting). Attention will be given to the problem,of increasing
tne effectiveness of polypropylene filters for nitrosaisLine removal. It
is possible that samples of modified polymers will be produced by, for
example, Hercules, under a joint project arrangements
Any other promising materials which can be located will be examined.
The contract work on the mechanisms of nitric oxide filtration by
nitrosobenzone on carbon will be continued in 1982 - 1983.
2. Controlled smoking filters
The emphasis of the fundamental work on smoke particle capture is being
increased. The preliminary technique development work has been completed
and attention will be given to the study of changes in particle capture CT,%
mechanisms when the construction of the filter is changed. In the
revised programme this work will be shown separately from the work on
cc
controlled smoking filters (Cs?). P-0
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The definition of CSF will be changed from those which give a f lat
profile to those which give a more attractive profile to the smoker,
which may not necessarily be flat. Considerable ef fort will be directed
to various ways of changing smoke profiles; one means which will be
mentioned in the now programme is changing the effective length of the
filter as the cigarette is smoked. Other ideas will be examined as
they arise.
Several versions of the high pressure drop/low efficiency filter have
been explored this year and it seems advisable to obtain views on
these before further work is undertaken. CSF/1 (and high pressure drop/
low efficiency filters in general) can be used to substantially modify
particulate:vapour phase ratios in smoke (e.g. tar:CO, tar:NO). In the
new programme work will be undertaken to ensure that advantage can be
taken of these filters in meeting commercial and health pressure
situations.
3. Filter Technology Development
(a) Microwave drying
The objectives remain unchanged, but timescales have been delayed
considerably by the contractual difficulties encountered with
Philips. It is probable the programme will not commence until the
last quarter of 1982 and continue until the third quarter of 1983.
(b) Reductions in filter rod variability, etc.
There has been little support from C. A. C. countries for this work,
which amounts to partial automation of the KDF2 machine, to be
undertaken by GR&DC. Consequently, this item is now subject to
review and may be deleted.
(0 Extrusion
It is proposed to introduce this item into the 1983 filter pro-
gramme. Currently, studies are under way to-determine the diffi-
culties that are likely to be encountered in extruding foamed and
profiled rod form structures in GR&DC. Extruded filters or filter
components are expected to widen considerably BAT product design
capability.
4. Advisory and Support
(a) Hercules tow
It in planned to enter into a 2-3 year Joint Development Progr
with Hercules to explore specific objectives outside the scope of
the Souza Cruz/Hercules Joint Venture agreement. Subject to agree-
ment, this programme should commence last quarter, 1982. Subjects
may be selective filtration improvement, hardener Mark 11 and
thermal bonding of fibres together with subjective evaluation
using a number of different cigarette styles.
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(b) Filter manufacturing evaluation - RAT(UKrxE)
This item was entered into the 1982 programme commencing in July,
1982. GR&DC have been requested to examine the filter making opera-
tions in the UK factories and make recommendations for improved
tow usage, both through better tow selection and operation and
reduction of waste. The work is being funded entirely by BAT(UKGE)
but has a clear interest for the whole BAT Group. It is intended
to circulate the final report widely. It is anticipated the
programme will last 6-9 months, thus extending into the 1983 first
quarter.
NO
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BATCo document for Province of British Columbia 19 April 1999