Accession Number : ADA320403

Title :   A Comparison Measurement of the Physical Properties of Round-Robin Test Materials,

Corporate Author : DEFENCE AND CIVIL INST OF ENVIRONMENTAL MEDICINE DOWNSVIEW (ONTARIO)

Personal Author(s) : Cain, Brad

PDF Url : ADA320403

Report Date : OCT 1996

Pagination or Media Count : 13

Abstract : A round-robin test of procedures for assessing certain textile properties has been proposed as part of a TTCP-PTP3 effort to facilitate the exchange of data between countries using different apparatuses. The objective of that study, Operating Assignment 9, is to determine whether values of thermal conductivity and water-vapour permeability of various fabrics are comparable when measured on two different apparatuses: the CORD Sweating Hot Plate (used by Australia and Canada) and the Hoenstein Sweating Hot Plate (used by the United Kingdom and the United States). Several fabric samples were submitted for independent testing by various nations. Sweating hot plates were developed as research tools to examine questions of combined heat and moisture transport through clothing ensembles rather than as an apparatus for determining fabric characteristics. As such, there was some concern that the material property values obtained with a sweating hot plate may not be sufficiently precise. The work presented here is an alternative measure to the sweating hot plate approach for determining the relevant material properties. The two apparatuses used in this investigation were specifically designed to measure thermal conductivity and water-vapour permeability and should thus provide an accurate benchmark for comparison of the other methods. As this is an interim report, no comparison was done of the results obtained to sweating hot plate values.

Descriptors :   *MEASUREMENT, *MOISTURE, *TEXTILES, PERMEABILITY, LABORATORY TESTS, PHYSICAL PROPERTIES, HIGH TEMPERATURE, COMPARISON, CANADA, THERMAL CONDUCTIVITY, TRANSPORT, ENVIRONMENTAL TESTS, CLOTHING, WATER VAPOR.

Subject Categories : Textiles

Distribution Statement : APPROVED FOR PUBLIC RELEASE