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Heat Resistant Fiberglass Cloth Roll
Product Overview
Heat resistant fiberglass cloth roll is manufactured with high-purity E-glass or R-glass filaments using a proprietary heat-clean sizing process. This cloth maintains structural integrity at temperatures up to 650°C continuous, with short-term exposure tolerance up to 750°C. Available in thicknesses from 0.30 mm to 2.00 mm and weights ranging 200 g/m² to 900 g/m². The fabric exhibits low thermal conductivity (0.035–0.045 W/m·K) and retains 90% of room-temperature tensile strength after 1000 hours at 500°C. The cloth is treated with a heat-stable binder that minimizes smoke emission during high-temperature exposure.
Core Advantages
Product Specifications
| Fiber Composition | E-glass / R-glass (heat-clean treated) |
| Weave Type | Plain, Twill, or Leno |
| Thickness Range | 0.30 – 2.00 mm (±0.04 mm) |
| Areal Weight | 200 – 900 g/m² |
| Continuous Operating Temperature | –60°C to +650°C |
| Peak Temperature (15 min) | 750°C |
| Thermal Conductivity | 0.035 – 0.045 W/m·K |
| Weight Loss at 600°C (24h) | ≤ 0.5% |
| Roll Width | 900 mm, 1100 mm, 1300 mm |
| Roll Length | 25 m, 50 m, 100 m |
Application Fields
Handling & Installation Notes
Frequently Asked Questions
Heat resistant fiberglass uses high-purity silica-based glass (typically SiO₂ > 55%) with specialized heat-clean processing that removes organic coatings. This provides up to 150°C higher service temperature than standard E-glass. The cloth also exhibits lower shrinkage (≤ 1.5%) at elevated temperatures and resists devitrification, which causes standard fiberglass to become brittle above 450°C.
Yes, for short-term splash protection up to 750°C. However, direct immersion in molten aluminum (660°C) may cause wetting and capillary penetration over time. For extended contact, use a ceramic coating or a zirconia fabric inner layer. The cloth is more suitable for protecting structural elements from radiant heat rather than submersion.
Heat resistant fiberglass cloth has thermal conductivity of 0.035–0.045 W/m·K, which is approximately 30% higher than ceramic fiber blankets (0.020–0.030 W/m·K). However, the cloth offers significantly higher tensile strength (≥ 300 MPa) and abrasion resistance, making it suitable for applications requiring both thermal protection and mechanical durability.
Edge sealing is recommended using a high-temperature silicone or ceramic adhesive applied 2–3 mm from the cut edge. Alternatively, thermal tape (3M 3380 or equivalent) can be applied to both sides. For critical applications, use a folded hem stitch with Inconel wire to create a mechanical seal that withstands vibration and thermal cycling.
The heat-clean treatment removes organic compounds, but the cloth can absorb oils if contaminated before use. At temperatures above 300°C, oil contamination will pyrolyze and potentially create carbon deposits that can reduce the cloth's thermal performance. For applications with oil exposure, use a fluoropolymer or graphite-based coating to provide a contamination barrier.
At 550°C continuous operation, the cloth has a projected service life of 5,000–8,000 hours before tensile strength degrades to 70% of initial value. Actual lifespan depends on thermal cycling frequency, mechanical vibration, and atmospheric conditions. Regular inspection every 1,000 hours is recommended. For critical safety applications, replacement at 5,000 hours is advised.
