Glass Fibres
category
Glass fibres are inorganic fibres produced by melting glass (silica-based composition with alumina, calcium oxide, boron oxide) at 1400-1600°C and extruding through platinum bushings with 200-8000 holes of 1-2 mm diameter, followed by rapid cooling and attenuation to 3-24 μm diameter filaments. Annual global production exceeds 7 million tonnes.
Role
The most commercially significant reinforcement fibre for polymer composites, accounting for 90% of composite reinforcement market, used extensively in automotive, construction, marine, aerospace, and wind energy applications.
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Subtopics
- Glass Fibre Types and Compositions Major types: E-glass (electrical, 54% SiO₂, 14% Al₂O₃, 17% CaO, 10% B₂O₃—90% of production, general …
- Glass Fibre Manufacturing Process Production: (1) batch preparation mixing silica sand, limestone, alumina, borates, (2) melting in fu…
- Glass Fibre Properties and Performance E-glass properties: tensile strength 3.4-3.8 GPa (340-380 kg/mm²), Young's modulus 72-76 GPa, elonga…
- Glass Fibre Product Forms Commercial forms: continuous roving (parallel filament bundles, 100-10,000 tex for pultrusion, filam…
- Glass Fibre Sizing and Surface Treatment Sizing composition: film formers (PVA, polyurethane, epoxy—30-60%, providing strand integrity), coup…
- Glass Fibre Reinforced Composites GFRP (Glass Fibre Reinforced Polymer) composites achieve: tensile strength 200-1500 MPa (depending o…
- Glass Fibre in Automotive Applications Automotive applications (30% of glass fibre consumption): body panels (SMC/BMC compression molding—h…
- Glass Fibre in Wind Energy Wind turbine blades (20-25% of glass fibre demand, fastest growing sector): E-glass/epoxy or polyest…
- Glass Fibre in Construction and Infrastructure Construction applications: pultruded profiles (I-beams, channels for corrosive environments—chemical…
- Glass Fibre Composites Recycling and Sustainability Recycling challenges: glass fibre composites are non-biodegradable, thermoset matrix prevents remelt…