A COMPARISON OF APPARATUS USED TO MEASURE WATER VAPOUR RESISTANCE

Authors
  1. Dolhan, P.A.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
Various methods of determining the permeability of textile fabrics to the passage of water vapour have been developed and described. An investigation was undertaken to compare the Canadian General Specifications Board (CGSB) Control Dish Method, the apparatus and method described by Farnworth and Dolhan (the DND Method) and two procedures from the American Society for Testing and Materials (ASTM) Method E96, and to determine the accuracy of the first two. Several uncoated fabrics were tested, as well as fabrics with a polytetrafluoroethylene film, fabrics with microporous polyurethane films, and fabrics with hydrophilic coatings. The accuracy of the apparatus was determined by measuring the water vapour resistance of still air layers.
Date of publication
15 Oct 1987
Number of Pages
14
Reprinted from
J of Coated Fabrics, vol 17, 1987, p 96-109
DSTKIM No
89-00214
CANDIS No
58159
Format(s):
Hardcopy;Originator's fiche received by DSIS

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