Lightweight and High-Strength
Its relative density ranges from 1.5 to 2.0-only one-quarter to one-fifth that of carbon steel-yet its tensile strength approaches, or even exceeds, that of carbon steel, while its specific strength is comparable to that of high-grade alloy steels. Consequently, it proves highly effective in applications involving aircraft, rockets, spacecraft, high-pressure vessels, and other products where weight reduction is a critical requirement. Certain epoxy FRPs can achieve tensile, flexural, and compressive strengths exceeding 400 MPa. The density, strength, and specific strength values for selected materials are presented in Table 1-1.
Excellent Corrosion Resistance
FRP is an excellent corrosion-resistant material, exhibiting strong resistance to atmospheric conditions, water, acids, alkalis, salts (at standard concentrations), as well as various oils and solvents. It has been successfully applied across the entire spectrum of chemical corrosion-protection applications, where it is increasingly replacing traditional materials such as carbon steel, stainless steel, wood, and non-ferrous metals.
Superior Electrical Properties
It serves as an excellent electrical insulating material and is widely used in the manufacture of insulators. It retains its superior dielectric properties even at high frequencies. Furthermore, it exhibits excellent microwave transparency, making it widely utilized in the construction of radar radomes.
Excellent Thermal Properties
FRP possesses 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 exceptional thermal insulation material. In scenarios involving transient 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.
High Design Flexibility
① It allows for the flexible design of various structural products tailored to specific needs and performance requirements, thereby enabling the creation of products with exceptional structural integrity.
② It offers extensive material selection options to precisely match product performance specifications-for instance, enabling the design of materials optimized for corrosion resistance, resistance to transient high temperatures, exceptionally high strength in specific directions, superior dielectric properties, and so forth.
Excellent Processability
① The molding process can be flexibly selected based on the product's shape, technical specifications, intended application, and production volume.
② The manufacturing process is straightforward, often allowing for single-step molding; this yields significant economic benefits, particularly highlighting its processing superiority for low-volume products with complex shapes that are otherwise difficult to form using conventional methods.
