ASTM F1249 PDF

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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.

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NOTE 1—Values for water vapor permeance and water vapor permeability must be used with caution.

Precision and Bias In earlier model WVTR equipment, a separate desiccant drying system is needed for the conditioning rack and test chamber. The test conditions see 3. 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. The inverse relationship of WVTR to thickness and the direct relationship of WVTR to the partial pressure differential of water vapor may not always apply.

These may be applied to both sides of a barrier to reduce the sample area. For modern high barrier materials, this method is not sensitive enough to measure the results, or efficiently obtain results in a reasonable time period. Historical Version s – view previous versions of standard. A typical acceptable diffusion cell area is 50 cm2.

ASTM F1249

Newer WVTR equipment does not require saturated salt solutions. Individual reprints single or multiple copies of this standard may be asrm by contacting ASTM at the above address or at phonefaxor service astm.

A number in parentheses indicates the year of last reapproval. Packaging Applications – Industrial A superscript epsilon e indicates an editorial change since the last revision or reapproval. Send us a request Need help or have a question? Your comments will receive careful consideration at a meeting of the responsible technical committee,1 which you may attend.

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This may be accomplished in two ways: Packaging Applications – Healthcare 4. Temperature is a f149 parameter affecting the measurement of WVTR. F eliminates operator-dependent variables for more accurate test results, and enables more informed packaging decisions.

Global Reach Intertek is the industry leader with over 42, people in 1, locations in over countries. F provides more precise and repeatable WVTR testing data compared to E96, and provides that information in less time. Select samples considered representative of the material to be tested.

Water Vapor Transmission Rate (WVTR) ASTM F1249

F has many clear advantages over E96, including precision, repeatability, accuracy and sensitivity. The value of C is derived from tests of a known reference?

At a selected temperature and humidity, a barrier film is sealed between a wet chamber and dry chamber. Greater sensitivity provided by F methodology ensures lab and business managers have the information they need to make packaging decisions that meet requirements in challenging environmental conditions globally.

It is essential to accurately test the barrier property, also called as water vapor transmission rate WVTR.

This information should be available from the manufacturer of the reference? If unfamiliar with the material being tested, the operator should investigate the effect of conditioning time to be certain that sufficient time has been allowed for the material to equilibrate under the test conditions see Note 3. Formally confirming that your products and services meet all trusted external and qstm standards.

Precision, characterized by repeatability Sr and r, and reproducibility SR and R, has been determined for the following materials to be: Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. It is desirable to thermostatically control the temperature of the conditioning rack as described in 6.

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Permeability calculations are meaningful only in cases where materials have been determined to be homogeneous. Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards.

Link to Active This link will always route to the current Active version of the standard.

Water Vapor Transmission Rate (WVTR) ASTM F Standard – Labthink

NOTE 3—When testing materials for which the operator has no previous history, additional time must be allowed to f12249 that true equilibrium has been reached. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the f12249 of regulatory limitations prior to use. Note 1 — Values for water vapor permeance and water vapor permeability must be used with caution.

Again, this is necessary only in the earlier model WVTR instruments that have a separate conditioning rack and testing chamber.

The dry chamber and the wet chamber make up a 1. Assurance Testing Inspection Certification. It provides ashm the determination of 1 water vapor transmission rate WVTR2 the permeance of the film to water vapor, and 3 for homogeneous materials, water vapor permeability coefficient. In that case it may be necessary to provide cooling coils to remove some of the heat.

Water vapor diffusing through the?