Leading European Manufacturer and Global Supplier of Thermal, Industrial and Technical Textiles

E Glass Fibre Technical Information

The base material for the vast majority of heat resistant and composite textiles are manufactured  from 6 - 9 micron 'E' Glass fibre filaments that have been bought together to make rovings or yarns. 

 Please click here to view our PDF on E Glass Fibre and Yarn Production.

E Glass Fibre has the following key characteristics for thermal applications:

  • Inorganic, sterile, incombustible and totally asbestos free.
  • Do not contain any toxic matter or heavy metals.
  • Low thermal conductivity.
  • Good resistance to chemical agents.
  • Good electrical properties.
  • Good dimensional stability.
  • High thermal resistance.
  • Good flexibility.
  • High mechanical strength.

BASIC COMPOSITION OF E GLASS FIBRE
SiO2 53 - 55%
Al2O3 14 - 15.5%
CaO - MgO 20 - 25%
B2O3 6.5 - 9%
Fe2O3 - TiO2 < 1%
Na2O - H2O < 1%

GENERAL PROPERTIES OF E GLASS FIBRE
Colour White
Max Continuous Temperature 550°C in optimum conditions.
Melting Point 1200°C
Diameter Filaments > 6-9 micron
Tensile Strength of Virgin Filament 3400 Mpa
Young's Modulus 7400 Mpa
Thermal Conductivity 1.0 W/m °K
Fire Reaction Incombustible
Loss on Ignition < 1.5%
Dielectric Resistivity 60-100 KV/mm
Solvent Resistance Good
Bases Resistance Good
Acid Resistance Good – except hydrofluoric acid.

 Major E Glass Fibre Producers include but are not exlusive to:

  • St Gobain Vetrotex in Czech Republic
  • AGY in USA
  • China Jushi Co Ltd in China
  • PFG Fiber Glass in Taiwan

Please click here to view this as a PDF Document.