M00000300
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ASTM D6701-16 Standard Test Method for Determining Water Vapor Transmission Rates Through Nonwoven and Plastic Barriers
standard by ASTM International, 08/01/2016
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Availability date: 07/24/2021
1.1This test method covers a procedure for determining the rate of water vapor transmission ranging between 500 to 100,000 g/mday through nonwoven and plastic barrier materials. The method is applicable to films, barriers consisting of single or multilayer synthetic or natural polymers, nonwoven fabric, and nonwoven fabrics coated with films up to 3 mm (0.1 in.) in thickness.
1.2This test method provides for the determination of (1) water vapor transmission rate (WVTR), and (2) the permeance to water vapor.
1.3The values stated in metric units are to be regarded as the standard. The acceptable units for water vapor transmission rate are usually g/mday.
1.4This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.