Filter Ventilation and Design
Subject: The future of Filter Dilution.
Abstract
Posits that filter dilution could adversely affect "the ambient smoke issue" due to increased emission of smoke constituents. Cautions that "widespread use of Exit type filters with the associated high degree of variability of smoke dilution experienced by the smoker might lead the authorities to stipulating that filter dilution must be suppressed on smoking machine measurements of the smoke yield." Suggests projects focused on filler modifications resulting in reduced filler combustion which, in turn, would result in reduction in smoke yield while maintaining puff count.
Fields
- Type
- Memorandum
- Company
- Philip Morris
- Site
- http://www.pmdocs.com
- Author
- Gaisch, H.
- Recipient
- Bourlas, M.C.
Document Images
FTR RESEARCH AND DEVELOPMENT
P.O. Box CH-2003 NeuchAtel
INTER-OFFICE CORRESPONDENCE
To: Dr. M.C. Bourlas
3S 70
(9c-7)
a6G
Date: Oc tober 12, 1981.
From: H. Gaisch Number:
The future of Filter Dilution.
Subject:
Presently, filter dilution is used for the reduction of
gas phase delivery and for balancing the effects of the
introduction of expanded tobacco on the puff count of a
cigarette.
I can foresee a scenario in which filter dilution could
become an embarrassment rather than a help.
the puff count is maintained.
1. The ambient smoke issue could become so important that
the increased emission of smoke constituents caused by
the use of filter dilution becomes unacceptable.
2. A widespread use of Exit type filters with the associa-
ted high degree of variability of smoke dilution expe-
rienced by the smoker might lead the authorities to
stipulating that filter dilution must be suppressed on
smoking machine measurements of the smoke yield.
I would like to suggest to accelerate projects which deal
with filler modifications such as the application of salt
casing, bio-transformations etc. which result in the re-
duction of the combustion rate of the filler, in particu-
lar of expanded filler.
The objective should be to reduce the total amount of
organic matrix available for combustion and pyrolysis in
the cigarette in order to achieve the desirable reduction
in smoke yield of the product whilst, at the same time,
cc: Mr. J. Gibson
W.
D.
U. Fink
Schulthess
Nyffeler
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