Want this as a site license? Changes from the previous issue A redline edition is available for this document, with all changes visible. Ask Document Center Inc. Scope 1. A reasonable value may be approximately 0.
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Document Center Inc. A reasonable value may be approximately 0. This limit can be checked for each instrument with an impervious specimen such as aluminum foil.
Calibration procedures can compensate for the leakage rate if so stated. The values gives in parentheses are provided for information purposes only. This test method is unique in that it closely duplicates typical product storage where a transfer of moisture from a package into the environment is allowed to proceed without constantly sweeping the environmental side with dry gas.
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. Significance and Use No single set of test conditions can represent all climatic and use conditions, so this WVTR test method serves more to compare different materials at a stated set of conditions than to predict their actual performance in the field under any conditions.
The water vapor transmission rate, under known and carefully controlled conditions, may be used to evaluate the vapor barrier qualities of a sheet. Direct correlation of values obtained under different conditions of test temperature and relative humidity will be valid provided the barrier material under test does not undergo changes in solid state such as a crystalline transition or melting point at or between the conditions of test.
Keywords dynamic measurement; flexible barrier materials; relative humidity; sheet material; water vapor transmission To find similar documents by ASTM Volume: This document is available in either Paper or PDF format. Document Number.
Zulkimuro How do you ship the products? Work Item s — proposed revisions of this standard. Calibration procedures can compensate for the leakage rate if so stated. Labthinkthink for astmm only! Find Similar Products By Category. A reasonable value may be approximately 0. Specifications Film Test Test Range 0.
ASTM E398 - 13