GF
HR-Glass Technical Reinforcement
VALMIERA GLASS ? HR
Manufacturer page / TDSDescription
Glass family: HR. Product form: Yarn / fabric family. Scope: High-temperature/specialty composite reinforcement. Official family service positioning around 800°C. Grade-level dimensions and sizing depend on the product specification.. Official source: GF-VAL-PRODUCTS
Comparative overview
Glass fiber — High-strength / high-modulus glass (S, R, T or equivalent)
Strengths: Higher tensile strength, strain capability, fatigue and impact tolerance than ordinary E-glass while remaining electrically insulating.
When to use: Select for rotor blades, pressure vessels, ballistic/impact panels, aircraft interiors and cost-effective radomes requiring more performance than E-glass.
Key tradeoffs: Higher density and lower specific stiffness than carbon, with a substantial price premium over E/E-CR glass.
Qualitative ratings (1–10 scale)
| Relative cost | 6/10 — Moderate–high — specialty S/R/T-type glass with higher raw-material and melting-control cost. |
|---|---|
| EM transparency | 8/10 — Very good — good dielectric behavior, though low-Dk glass/quartz are superior for the most demanding RF windows. |
| Temperature / fire resistance | 8/10 — Very high — non-combustible with improved strength retention and processing temperatures versus E-glass. |
| Impact / penetration resistance | 8/10 — Very high — high strength and strain give very good low-velocity impact, fatigue and damage tolerance. |
| Electrical / thermal conductivity | 1/10 — Very low — electrically and thermally insulating. |
| Specific tensile strength | 4/10 — 4/10 | 1085.3 kN·m/kg | Class median |
| Atmospheric durability | 7/10 — Good — high-strength glass retains useful outdoor durability, but moisture-assisted crack growth can reduce filament strength under sustained stress. |
| Sustainability (CO₂e) | 9/10 — 1.70 kg CO₂e/kg fiber — Low emissions — data quality: Medium |
Technical properties
Applications and processing
construction and structural composite reinforcementIndustrialthermalWeaving; coating; impregnation; composite conversion