Plastic Film is pleased to announce the formal introduction of our line of Kynar® film Sampling Bags. The development of this film began when the automotive industry realized that the present film specified in the Federal Register namely Tedlar® could no longer meet the future requirements of the emission testing labs due to "DMAC".
DMAC is part of the Tedlar® manufacturing process and remains in the film outgasing hydrocarbons thereby increasing the possibility of failing a vehicle test. The introduction of the new LEV and ULEV vehicles would require films with levels of contamination in the parts per billion and not parts per million as the present films.
The automobile industry through AIGER (Automotive Industry/Government Emissions Research), a cooperative research and development agreement met monthly to discuss current problems and possible solutions. A contract was issued to Southwest Research Institute to undertake the project of collecting and testing all possible known films to find the film to replace Tedlar®. Plastic film was asked by AIGER to supply many of the films including Kynar® and supply their advanced Kynar® fittings for all the testing being performed. When the final results were in, Kynar® was the unanimous choice.
Using the published results, General Motors undertook its own development program using sampling bags made of PFE supplied Kynar® with PFE proprietary Kynar® fittings. The results of these undertakings were reported in a technical paper presented at the 2002 SAE conference. Copies of this presentation can be obtained from the SAE – technical paper 2002-01-0051, 2002. Also, Mr. Jim Hill of General Motors wrote a report for the AIGER group on conditioning the sampling bags to achieve background levels to 15 parts per billion or less. Presently PFE supplies these Kynar® bags to General Motors with production background levels of 45-65 parts per billion, prior to conditioning by General Motors.
PFE is offering this new Kynar® film in two thicknesses, 3 mil for ambient emission sampling and 4 mil for automotive emission sampling. The 3 mil will be offered at prices compared to the present Tedlar® while 4 mil for more stringent applications will be preconditioned with special bakes and special handling, thereby obtaining background levels between 45-65 parts per billion.
DuPont Tedlar®, the best choice for your sampling bag needs. Tough, chemically inert, low permeability and re-usable when purged with nitrogen before each re-use. This re-use property makes Tedlar® sampling bags very economical. Rated for continuous use up to 225° F when used with the appropriate rated fitting materials.
Fabricated from five layers of very distinct materials to achieve low permeability numbers. These bags are used when the sample must be kept in the bag for long periods of time. However, one must adjust for the inner layer of polyethylene which might affect the stored sample. These bags are tough, economical and provide light blocking capabilities.
The most inert material available for storage of samples available, Teflon's® only drawbacks are permeability and cost. Teflon® offers the highest use temperatures of all the sampling materials from -400°F to +400°F. FEP type, -400°F to +500°F, PFA, -400°F to +300°F for ETFE. Plastic Film carries the following Teflon® films for your special sampling bag needs: 5 mil FEP resins, 2 mil PFA resins, 2 mil ETFE resins.
We offer a wide range of specialty films beyond ones listed. Please use the links on the left to view the data sheets on some of these films. If you do not see the film you are looking for please contact us and we can discuss the availability.