Thermal Properties

Vectran HT has excellent thermal properties especially in regard to thermal loading.

Fiber thermal properties

Vectran Aramid
HT UM Standard High Modulus
LOI 28 30 30 30
M.P., °C None 350 None None
HAS (hot-air shrink, 180°C, 30 minutes), % < 0.2 < 0.1 < 0.2 < 0.1
BWS (boiling water shrinkage, 100°C, 30 minutes), % < 0.2 < 0.1 < 0.2 < 0.1
50% Strength Retention Temperature, °C 145 150 400 230
TGA (20% weight loss), °C > 450 > 450 > 450 > 450

Equilibrium moisture regain

Temperature
(°C)
Relative Humidity
(%)
Vectran Aramid
HT UM Standard High Modulus
20 65 < 0.1 < 0.1 4.2 4.1
20 80 < 0.1 < 0.1 4.8 4.8
20 90 < 0.1 < 0.1 5.4 5.5

Vectran at high temperature

Mechanical property retention during or after thermal exposure is a key concern in many applications. The tensile strength of Vectran at temperature should be used as a reference in selecting process conditions.

Thermal Properties at High Temperatures

Vectran after thermal exposure

For high temperature processing at low mechanical load, Vectran will have excellent strength after processing, superior to aramids.

Thermal Properties after Thermal Exposure

Vectran resistance to cyclic thermal loads

The resistance of Vectran to cyclic thermal loads at higher temperatures is superior to aramids and increases product lifetimes.

Thermal Properties Resistance to Cyclic Thermal Loads

Thermal Properties Resistance to Cyclic Thermal Loads

Thermal Properties Resistance to Cyclic Thermal Loads

Vectran thermal properties at low temperature

Evaluated by ILC Dover during the design of the airbag system for the 1997 Mars Pathfinder mission, ILC reported Vectran increased in strength in tests at –62°C, leading to its selection for the airbag fabric and external assembly tendons.

Thermal Properties at Low Temperature

Vectran HT CTE at various temperatures

Temperature Range Fiber Longitudinal Direction CTE
(m/m- °C x 10-06)
Vectran HT Standard Aramid
–150 to 100°C –4.8 –4.9
100 to 200°C –11.6 –5.8

Thermal conductivity of Vectran HT

Direction Temperature °C Density
g/cm3
Specific Heat
J/kg-°K
Thermal Conductivity
W/m-°K 10-3 cal/cm-sec-°C
Vectran HT Longitudinal 23 1.4 1100 1.5 3.5
100 1.4 1420 2.0 4.7
Standard Aramid Longitudinal 23 144 1230 2.5 5.9