Property:
Resistance to dry heat transfer (i.e., fabric insulation value)

Methods:
ASTM D 1518 "Thermal Transmittance of Textile Materials"
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:
Guarded hot plate in an environmental chamber; custom hood provides either horizontal or vertical air flow at different levels

Specimen number and size:
Three 20 x 20 inch squares

Cost:
$350 per fabric type (3 reps)

Note: If only one sample of one type of fabric is sent, we will charge you for one rep of the bare plate test ($117).

Vertical air flow hood over plate

Horizontal air flow hood over plate

Box Hood (still air conditions)

©2011 Institute for Environmental Research