ASTM F1249 PDF
Water Vapor Transmission Rate (WVTR) ASTM F Permeation of Flexible Barrier Materials Using a Modulated Infrared Sensor. Water Vapor Transmission . Designation: F – 05 Standard Test Method for Water Vapor Transmission Rate Through Plastic Film and Sheeting Using a Modulated. ASTM F outlines an instrumented procedure for determining the rate of water ASTM F is a standard test method for measuring the water vapor.
|Published (Last):||24 June 2007|
|PDF File Size:||13.64 Mb|
|ePub File Size:||11.63 Mb|
|Price:||Free* [*Free Regsitration Required]|
F provides more precise and repeatable WVTR f124 data compared to E96, and provides that information in less time. Your comments will receive careful consideration at a meeting of the responsible technical committee,1 which you may attend. By producing actionable results in less time, F accelerates product and packaging development, and time to market is similarly reduced.
Reagents and Materials 7. Due to the limitation of the sensitivity. Dry air is continually purging the dry chamber of those cells that are connected to the conditioning rack while the humid chamber side is held at a speci?
These entries should be rounded off to three signi? Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
This is necessary only in the earlier model WVTR instruments that have a separate conditioning rack and testing chamber. Testing repeatability is of great importance. This is a critical sealing surface against which the test specimen is pressed; it shall be smooth and without radial scratches. A depth of approximately 6 mm 0.
F has many clear advantages over E96, including precision, repeatability, accuracy and sensitivity.
ASTM F – pdf – ASTM F Standard Test Method for Water Vapor Transmission_百度文库
NOTE 3—When testing materials for which the operator has no previous history, additional time must be allowed to assure that true equilibrium has been reached. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
Summary of Test Method 4. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Whether your business is local or global, we can ensure your products meet quality, health, environmental, safety, and social accountability standards for virtually any market around the world.
A number in parentheses indicates the year of last reapproval. Temperature is a critical parameter affecting the measurement of WVTR. At a selected temperature and humidity, a barrier film is sealed between a wet chamber and dry chamber.
When in doubt, retest after an additional conditioning interval of several hours. Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. This information should be available from the manufacturer of the reference?
Water Vapor Transmission Rate (WVTR) ASTM F1249
This method is suitable to test modern flexible barrier films and sheets consisting of single f249 multilayer natural or synthetic polymers and foils. The test conditions see 3. A separate conditioning rack Fig.
This information is then used to calculate the rate at which moisture is transmitted through the material being tested. System Calibration With Reference Film 9. Determine water vapor transmission asfm of flexible barrier materials used in packaging or industrial applications. ASTM F — Validating the asttm, value and t1249 of your raw materials, products and f2149.
Packaging Applications – Healthcare 4. In that case it may be necessary to provide cooling coils to remove some of the heat. Again, this is necessary only in the earlier model WVTR instruments that have a separate conditioning rack and testing chamber.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Need help or have a question? It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
For modern high barrier materials, this method is not sensitive enough to measure the results, or efficiently obtain results in a reasonable time period. Newer computer-controlled systems will automatically calculate the WVTR. F eliminates operator-dependent variables for more accurate test results, and enables more informed packaging decisions.
Water Vapor Transmission Rate (WVTR) ASTM F Standard – Labthink
Select samples considered representative of the material to be tested. The chamber shall also provide a thermometer well for the measurement of temperature. The lowest detection limit could be as low as 0.
Of the total eight laboratories that participated in this round robin, one did not report results for the PET sample. Current edition approved Oct.