E-Glass Fibre
Insulating Fibreglass
E-glass fibre is a composite material obtained by melting sand, soda, limestone and other minerals, which are then transformed into very fine filaments.
These filaments are so fine that they can be woven to create fabrics or used as reinforcement for other materials, such as plastic.
Components
Characteristics
Properties
SiO2: 53-55%
AI2O3: 14-15,5%
CaO – MgO: 20-24%
B2O3: 6,5-9%
Fe2O3 – TiO2: < 1%
Na2O – H2O: < 1%
Good stability at high temperatures
Excellent resistance to thermal shock
Good dimensional stability
Good mechanical resistance
Low thermal conductivity
Non-combustible
Excellent flexibility
Good chemical resistance
Colour: White
Maximum temperature: 550°C
Melting temperature: 1200°C
Fibre-filament diameter: 6-9 microns
Tensile strength-virgin filament: 3400 MPa
Young’s modulus: 74000 MPa
Thermal conductivity: 1.0 W/m °K
Reaction to fire: non-combustible
Calcination: < 1.5%
Dielectric strength: 60-100 KV/mm
Solvent resistance: Good
Base resistance: Good
Acid resistance: Good, except for hydrofluoric acid
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