(1) Lightweight and high strength
The relative density is between 1.5 and 2.0, which is only 1/4 to 1/5 of carbon steel, but the tensile strength is close to or even exceeds that of carbon steel, and the specific strength can be compared with high-grade alloy steel. Therefore, it has excellent results in aviation, rockets, spacecraft, high-pressure vessels and other product applications that need to reduce their own weight. The tensile, bending and compressive strengths of some epoxy FRPs can reach more than 400Mpa.
(2) Good corrosion resistance
FRP is a good corrosion-resistant material and has a good resistance to the atmosphere, water, and general concentrations of acids, alkalis, salts, and various oils and solvents. It has been applied to various aspects of chemical corrosion protection and is replacing carbon steel, stainless steel, wood, non-ferrous metals, etc.
(3) Good electrical properties
It is an excellent insulating material used to make insulators. It can still protect good dielectric properties under high frequencies. It has good microwave transmittance and has been widely used in radar antenna covers.
(4) Good thermal performance
FRP has low thermal conductivity, which is 1.25~1.67kJ/(m·h·K) at room temperature, only 1/100~1/1000 of metal, and is an excellent thermal insulation material. Under instantaneous ultra-high temperature conditions, it is an ideal thermal protection and ablation-resistant material, and can protect spacecraft from high-speed airflow above 2000℃.
(5) Good designability
① Various structural products can be flexibly designed according to needs to meet the use requirements, so that the product has good integrity.
② Materials can be fully selected to meet the performance of the product, such as: corrosion-resistant, instantaneous high temperature-resistant, particularly high strength in a certain direction of the product, good dielectric properties, etc.
(6) Excellent processability
① The molding process can be flexibly selected according to the shape, technical requirements, purpose and quantity of the product.
② The process is simple and can be molded in one go, with outstanding economic effects, especially for products with complex shapes and small quantities that are difficult to mold, which further highlights its process superiority.
Due to the great design flexibility of FRP tanks and the excellent performance of tank wall structure, fiber-wound FRP can change the resin system or reinforcement materials to improve the physical and chemical properties of FRP tanks and non-standard devices to meet the needs of different media and working conditions. The bearing capacity of the tank can be adjusted by adjusting the thickness of the structural layer, winding angle and wall thickness structure and design to make FRP tanks and non-standard devices with different pressure levels or certain special properties, which is incomparable to isotropic metal materials.