Glass Fiber Needle Felt is a non-woven fabric manufactured by needling chopped E-glass fibers (SiO₂ 52-56%, Al₂O₃ 12-16%). Fibers are short-cut to 50-90 mm lengths, carded into a web, and mechanically reinforced via high-density needle punching (thousands of barbs per m²). This process creates a 3D microporous structure with >90% porosity, enabling superior filtration, thermal insulation, and acoustic absorption.

• Temperature Resistance: Continuous use at 260-280°C; instantaneous tolerance up to 650-700°C (thermal shrinkage ≤3% at 650°C)
• Physical Performance: Thermal conductivity: 0.035-0.040 W/m*K (ambient); acoustic absorption rate: ≥90%; density: 110-220 kg/m³
• Chemical Safety: Resistant to acids/alkalis (except HF and concentrated H₃PO₄); non-combustible (Fire Class A1), zero toxic emissions, and SGS-certified eco-friendly

Compliant with industry standards (e.g., JC/T 590-1995), parameters for common grades are listed below:

To ensure integrity during transit, multi-layered protective packaging is applied:

1. Roll Configuration:
   • Material tightly wound onto rigid paper tubes (Ø≥7.6 cm), with edges laminated to prevent fiber shedding.
   • Standard roll length: 20-40 m (adjustable by thickness); width: 1,050-2,400 mm (customizable).
2. Sealed Protection:
   • Inner layer: Anti-static plastic film wrap to block moisture.
   • Outer layer: Reinforced woven bags or 5-ply corrugated boxes labeled "↑ Moisture-Proof, Handle with Care."
3. Shipping Units:
   • Individually packed rolls secured on wooden pallets (max. height: 1.2 m), stabilized with stretch film.

Optimal conditions to extend shelf life:

• Environment:
  • Temperature: 15-35°C (avoid freezing/heat exposure); humidity: 35-65% RH.
  • Store in dry, ventilated warehouses away from heat sources; no outdoor stacking.
• Handling:
  • Rolls placed vertically or flat on pallets; max. stacking height: 3 layers to prevent deformation.
  • Isolate from chemicals (especially acidic fumes) and sharp objects.
• Shelf Life:
  • 12 months in intact original packaging; use within 72 hours after unsealing.