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ASTM-F1249:1995 Edition

ASTM-F1249:1995 Edition

$40.63

F1249-90(1995) Standard Test Method for Water Vapor Transmission Rate Through Plastic Film and Sheeting Using a Modulated Infrared Sensor

Published By Publication Date Number of Pages
ASTM 1995 5
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1.1 This test method covers a procedure for determining the rate of water vapor transmission through flexible barrier materials. The method is applicable to sheets and films up to 3 mm (0.1 in.) in thickness, consisting of single or multilayer synthetic or natural polymers and foils, including coated materials. It provides for the determination of (1 ) water vapor transmission rate (WVTR), (2) the permeance of the film to water vapor, and (3) for homogeneous materials, water vapor permeability coefficient.

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

1.2 This standard does not purport to address all of the safety problems, 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.

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
Terminology
Summary of Test Method
2 Significance and Use
Apparatus
FIG. 1
FIG. 2
3 Reagents and Materials
Sampling
System Calibration With Reference Film
Pre-Test Sample Conditioning
Test Procedure
4 Calculation
Report
FIG. 3
5 Precision and Bias
X1. TESTING POOR BARRIERS
X1.1
X1.2
X1.3
X1.4
X1.5

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