S-Glass Fabric

- Technical Parameters -

(Also available: Twill and multi-axial constructions up to 600 g/m². Styles meet or exceed properties per MIL-R-60346 Type R and ASTM D578 S-glass standard.)

- Heaterk S-glass Fiberglass Fabric -

Heaterk's S-glass (high-strength glass fiber) fiberglass fabric is a specialized alumino-silicate glass engineered for high-load, high-temperature, and long-life structural applications—especially in aerospace, defense, and rotorcraft composite systems.

Compared to E-glass:

Tensile strength increases 30–40% (4600–4800 MPa)

Modulus improves 16–20% (up to 95 GPa)

Fatigue life improves nearly 10×, critical in high-vibration zones

Thermal service limit extends by 150°C, up to 700°C dry

Unlike aramid fibers, S-glass maintains stiffness and dimensional stability under humidity, heat, and load cycles, while offering better impact resistance and more reliable resin wet-out. When compared to carbon fiber, it provides cost-efficient toughness in hybrid composite layups.

- Features of Heaterk S-glass Fabric -

• Retains strength under thermal cycling and dynamic shear
• Supports lightweight structural reinforcement at lower cost than carbon
• Compatible with aerospace-grade resins (epoxy, BMI, cyanate ester)
• Used in primary or semi-structural laminates with critical stiffness and impact requirements
• Maintains dimensional integrity in humidity, high altitude, and temperature extremes

• Superior impact resistance over carbon and aramid

• Maintains flexural stiffness under repeated stress cycles

• Excellent bonding with structural resins (RTM, prepreg, infusion)

• Reduced microcrack propagation under vibration

• Lower density than carbon → weight savings in hybrid designs

• No galvanic corrosion → suitable for metal-interfaced structures

- Applications -

S-glass is engineered for mission-critical airframe components, where lightweight, impact resistance, and long-term fatigue stability under high thermal loads are essential.

Fixed-Wing Aircraft

• Engine nacelle panels

• Firewall liners and thermal bulkheads

• Secondary load-bearing skins

Rotorcraft

• Rotor blade root laminates

• Torque box reinforcements

• Fuselage vibration-critical zones

Aerospace Systems

• Fairings with thermal and acoustic demands

• Hybrid carbon/S-glass layups for improved impact tolerance

• Satellite enclosures requiring radiation and temperature cycling resistance

Military & Defense

• Missile and UAV fuselages

• Armor support layers (hybrid with aramid or ceramic)

• Composite blast/impact shields

- Compliance & Standards -

• ASTM D578 – S-glass classification
• MIL-R-60346 – Aerospace reinforcement specification
• ASTM D3039 – Tensile laminate performance
• RoHS / REACH – Fully compliant
• Lot-level traceability and COA provided on request
• Supplied in cleanroom or aerospace-converted formats