Kansas State University

Evaporative Resistance of Fabrics

Property:

Resistance to evaporative heat transfer

Method:

ASTM F 1868 "Thermal and Evaporative Resistance of Clothing Materials Using a Sweating Hot Plate Test"
ISO 11092 "Textiles--Determination of Physiological Properties--
Measurement of Thermal and Water-Vapour Resistance" 

Instrument:

Sweating hot plate in an environmental chamber; custom hoods provide either horizontal or vertical air flow at different levels

Specimen number and size:

3 - 20 x 20 inch squares 

Cost:

$375 per fabric type (3 reps)

 

Flooding the plate

Water is covered with a PTFE liquid barrier to keep the fabric sample dry during the evaporative resistance test.