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.

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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. The test area awtm considered to be the area established by the inside contact diameter of the compressed O—ring when the diffusion cell is clamped shut f249 the test specimen. F provides more precise and repeatable WVTR testing data compared to E96, and provides that information in less time.

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. The value of C is derived from tests of a known reference? For modern high barrier materials, this method is not sensitive enough to measure the results, or efficiently obtain results in a reasonable time period.

A aatm modulated sensor measures moisture transmitted through the material tested.

ASTM F1249

Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. 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.

If the material is nonsymmetrical two sides differentinclude a statement as to which side was facing the high humidity, The test conditions see 3. 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.

These shall incorporate O—rings suitable for sealing the diffusion cell to the test chamber pneumatic? ASTM E96 test method is also known as gravimetric or cup test. At a selected temperature and humidity, a barrier film is sealed between a wet chamber and dry chamber.

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

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.

Auditing Consulting Sourcing Training. The method is applicable to sheets and films up to 3 mm 0. 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.

ASTM D water c Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. This may be accomplished f1294 two ways: Of the total eight laboratories that participated in this round robin, one did not report results for the PET sample.

The accuracy of this method is therefore dependent upon the validity of the values assigned to these reference? Again, this is ast only in the earlier model Asstm instruments that have a separate conditioning rack and testing chamber.

This is necessary only in the f249 model WVTR instruments that have a separate conditioning rack and testing chamber. A separate conditioning rack Fig.

Precision, characterized by repeatability Sr and r, and reproducibility SR and R, has been determined for the following materials to be: Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Current edition approved Oct. E96 is highly labor intensive and generally provides poor in-lab repeatability and reproducibility f124 labs.

F can accurately differentiate barrier attributes of materials and packaging below the sensitivity limits of E Metal masks utilizing a neoprene O-ring are yet another alternative.

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Packaging Applications – Industrial The permeability is meaningful only for homogeneous materials, in which case it is a property characteristic of bulk material.

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Work Item s – proposed revisions of this standard. Inspection Validating the specifications, value and safety of your raw materials, products and assets. Originally approved in Water vapor diffusing through the? The inverse relationship of WVTR to thickness and xstm direct relationship of WVTR to the partial pressure differential of water vapor may not always apply.

Select samples considered representative of the material to be tested. NOTE 2—Use of Multiple Diffusion Cells—Experience has shown that arrangements using multiple diffusion cells are a practical way to increase the number of measurements that can be obtained in a given time.

Due to equipment limitations, only? Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. For moisture c1249 products, such as crackers, dry milk powers, prescription medicines, etc. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.

Report the average temperature and the range of temperatures observed during the test. Packaging Applications – Healthcare 4. Formally confirming that your products and services meet all trusted external and internal standards.

ASTM F – pdf – ASTM F Standard Test Method for Water Vapor Transmission_百度文库

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.

Key factors to understand material permeation include thickness of the material and environmental factors such as relative humidity and temperature.

Product asfm plays an important role in protecting product quality for the duration of its desired shelf life and providing packaged product stability.

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.