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For Release:
January 19, 2010
Updated August 9, 2010
Tedlar Bags To Become Obsolete: What’s Next?
In March of 2009, SKC received a letter from DuPont®, the manufacturer
of Tedlar® film. In this correspondence, DuPont stated the following:
| “Several of the key global markets in which Tedlar PVF oriented film is used continue to see high demand. Although DuPont continues to make improvements in our capacity to serve our various markets, current projections indicate that we are unable to fulfill all needs for our products. Unfortunately, DuPont has had to make some difficult choices about which markets we can continue to support, and we have determined that the gas sampling bag market is a segment where we will phase out support”. |
To their credit, DuPont did give advance notice of their plans before
sending out the letter. This gave SKC research chemists time to
evaluate other films as Tedlar alternatives. At this time, SKC offers
several choices
in air sampling bags:
Tedlar bags - SKC still has a supply of top-grade Tedlar film on-hand.
We will continue to offer Tedlar bags in 0.5, 1, 3, 5, 8, and 10-liter
sizes while supplies last.
SamplePro® FlexFilm bags -
After extensive research, SKC chemists determined that this film is
the best alternative to Tedlar. The SKC
proprietary SamplePro
FlexFilm offers storage stabilities > 3 days for many organic
vapors without the background levels of phenol and DMAC found in Tedlar.
See
SamplePro
FlexFilm Spec. Sheet (PDF) for storage stability
data on various compounds.
Kynar® bags - Many bag users have advised SKC that they
want to transition to bags made of Kynar PVDF film. SKC now offers
these bags in a variety of sizes and with choice of fittings. Note
that Kynar film is higher in price than SamplePro FlexFilm.
FluoroFilm bags - FluoroFilm
FEP is a very inert material and is a good choice for low-level
contaminants. The storage stability
in FluoroFilm
is very limited, however, and analysis within 24 hours is necessary
for good
results. SKC
provides FluoroFilm bags in a choice of sizes and fittings
at this
time.
FlexFoil® bags - SKC
has received many requests for bags suitable for the collection of biogas
and
landfill gases
including methane and hydrogen
sulfide. Four-ply FlexFoil bags are recommended for this
application. See the FlexFoil bags page for storage
stability data
on various compounds.
For more information: Email: skctech@skcinc.com
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