文档介绍：Designation: F 1249 – 06
Standard Test Method for
Water Vapor Transmission Rate Through Plastic Film and
Sheeting Using a Modulated Infrared Sensor1
This standard is issued under the fixed designation F 1249; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
Note—Paragraph was editorially corrected and the year date was changed on June 22, 2006.
1. Scope E 104 Practice for Maintaining Constant Relative Humidity
This test method covers a procedure for determining the by Means of Aqueous Solutions
rate of water vapor transmission through flexible barrier E 178 Practice for Dealing With Outlying Observations
materials. The method is applicable to sheets and films up to 3 E 691 Practice for Conducting an Interlaboratory Study to
mm ( in.) in thickness, consisting of single or multilayer Determine the Precision of a Test Method
synthetic or natural polymers and foils, including coated 3. Terminology
materials. It provides for the determination of (1) water vapor
transmission rate (WVTR), (2) the permeance of the film to Definitions:
water vapor, and (3) for homogeneous materials, water vapor