QGel 425導熱墊片 Thermal Pad
• one to one mix ratio
• 24 hour room temperature cure or heat cure
• soft but resilient gel
• Dispensing equipment not necessary
is a clear, very soft, tough, moderately cross-linked silicone polymer. Silicone
gels are used to provide protection from vibration, thermal or mechanical shock.
Silicone gels also provide excellent moisture protection.
Typical Properties
Uncatalyzed Properties
“A” Component “B” Component
Appearance Transparent Transparent
Viscosity, cps 150-250 150-250
Specific Gravity 0.97 0.97
Catalyzed Properties
Mix Ratio 1:1
Gel Time, 23°C >4h
Cure Time 30 min @ 150°C
60 min @ 100°C
Volatiles, % 0.1 max. (cured sample)
Service Temperature Range -55 to 200°C
Adhesion Silicone gels have a tacky surface and will
form a mechanical bond to most substrates
Hardness, g 20(10-30 range)
Electrical properties
QGels have excellent dielectric strength
Instructions for use
Mixing
The convenient one to one mix makes QSi’s QGels very easy to mix. Mix equally and
thoroughly by weight or volume. Once the components are mixed the curing process
begins. The pot life of the mixed material is shown under typical properties. Fast
curing gels (less than 30 minutes pot life) should be dispensed utilizing automated mix
and dispense equipment.
De-aeration
Air trapped during mixing should be removed to eliminate voids in the cured product.
Vacuum de-airing may be necessary to completely remove all entrapped air bubbles. To
insure proper de-airing, subject the mixed material to 29 inches of mercury.
Storage and shelf life
QGels should be stored in the original unopened container at 38C (100F). They will
remain useful for a period of 12 months if stored under those conditions.