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Glass Silicone (G7) Characteristics
G7, a glass silicone laminate, has excellent dielectric loss properties under dry conditions and good electrical properties under humid conditions. It also has excellent heat and arc resistance and is self-extinguishing. It is often used for electrical grade insulation as well as heating and appliance insulation.
While silicones do not retain their strength as well as epoxies and phenolics over time under lower temperatures, they are stronger over time under high heat conditions (over 400 degrees F). Characteristics include:
Outstanding electrical properties- Excellent heat and arc resistance
- Self-extinguishing
- UL 94V-O Flame class rating
Applications for G7 Thermosets
- Electrical grade insulation
- Heating and appliance insulation
- Shoulder bushings
- Lock bolt washers
- Arm insulating plates
- Bus tube standoffs
Contact a Dielectric Manufacturing knowledge expert to discuss the use of glass-silicone laminates for your application. Call 800-367-9122 or email sales@dielectricmfg.com.
Dielectric Manufacturing, Richfield, Wisconsin USA dielectricmfg.com Glass/Silicon Material Properties Provided By Dielectric Manufacturing, Richfield, Wisconsin
Property Typical value units
Physical
Specific Gravity/Density 1.75 g/cm3
Water Absorption -.125" < .35 %
Temperature Index 220 \ 428 °C \ °F
Hardness (Rockwell) 100 M scale
Bond Strength > 700 \ 320 lbs \ kgs
Flexural Strength-LW-A-.125" > 25000 \ 173 PSI \ MPa
Flexural Strength-CW-A-.125" > 22000 \ 152 PSI \ MPa
Izod Impact Strength-LW > 10 ft-lbs/in
Izod Impact Strength-CW > 8 ft-lbs/in
Compressive Strength-Flatwise > 47000 \ 324 PSI \ MPa
Electrical
Dielectric Breakdown-A > 50 kV
Dielectric Breakdown-D48/50 > 30 kV
Permittivity-A < 4.0
Arc Resistance-A 180 SEC
Dissipation Factor-A 0.003
Dissipation Factor-D24/23 0.02
