ASTM F1249-90(1995)
Historical Standard: ASTM F1249-90(1995) Standard Test Method for Water Vapor Transmission Rate Through Plastic Film and Sheeting Using a Modulated Infrared Sensor
SUPERSEDED (see Active link, below)
ASTM F1249
1. Scope
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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
D374 Test Methods for Thickness of Solid Electrical Insulation
D1898 Practice for Sampling of Plastics
E96/E96M Test Methods for Water Vapor Transmission of Materials
E104 Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions
E178 Practice for Dealing With Outlying Observations
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
Keywords
Flexible barrier materials; Diffusion cell apparatus; Infrared (IR) analysis--plastics; Plastic sheet and film; Polymers; Referee methods; Water vapor transmission (WVT);
ICS Code
ICS Number Code 83.140.10 (Films and sheets)
DOI: 10.1520/F1249-90R95
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