Lightweight and High Strength
Its relative density ranges between 1.5 and 2.0-only one-quarter to one-fifth that of carbon steel-yet its tensile strength approaches, or even exceeds, that of carbon steel. Furthermore, its specific strength is comparable to that of high-grade alloy steels. Consequently, it demonstrates exceptional effectiveness in applications requiring weight reduction, such as in aircraft, rockets, spacecraft, high-pressure vessels, and various other products. The tensile, flexural, and compressive strengths of certain epoxy FRPs can exceed 400 MPa.
Corrosion Resistance
FRP is an excellent corrosion-resistant material, exhibiting strong resistance to atmospheric conditions, water, and acids, alkalis, salts, and various oils and solvents of common concentrations. It has been applied across the entire spectrum of chemical corrosion protection and is currently displacing traditional materials such as carbon steel, stainless steel, wood, and non-ferrous metals.
Excellent Electrical Properties
It serves as an outstanding insulating material and is widely used in the manufacture of insulators. It maintains excellent dielectric properties even at high frequencies. Additionally, it possesses excellent microwave transparency, making it extensively utilized in radar radomes.
Excellent Thermal Properties
FRP exhibits low thermal conductivity-ranging from 1.25 to 1.67 kJ/(m·h·K) at room temperature-which is merely one-hundredth to one-thousandth that of metals; thus, it functions as an excellent thermal insulation material. Under conditions of instantaneous, ultra-high temperatures, it serves as an ideal material for thermal protection and ablation resistance, capable of shielding spacecraft against the erosive forces of high-velocity airflow at temperatures exceeding 2000°C.
