Glass Reinforced Plastic (GRP) based on vinyl ester resin features the following characteristics:
One: Lightweight and High-Strength
The density of FRP is 1.4-2.2 g/cm³, which is 4-5 times lighter than steel, yet it maintains significant strength, with its specific strength exceeding that of steel sections, hard aluminum, and cedar wood. This is of great importance for products in the aviation, aerospace, rocket, missile, military, and transportation industries that require weight reduction. For instance, the Boeing 747 jetliner uses 2.2 tons of FRP components in its primary structure, effectively saving fuel, increasing speed, extending range, and enhancing payload capacity.
Good corrosion resistance.
UPR-FRP is a superior corrosion-resistant material, capable of withstanding general concentrations of acids, bases, salts, most organic solvents, seawater, atmosphere, and oils. It also exhibits strong resistance to microorganisms. It is widely used in various sectors of the national economy, such as petrochemicals, agriculture, dyes, electroplating, electrolysis, smelting, light industry, and more, playing a role that no other material can replace.
Section 3: Excellent Electrical Properties
UPR-FRP boasts excellent insulating properties, maintaining good dielectric performance under high-frequency conditions. It does not reflect radio waves, is unaffected by electromagnetic forces, and has good microwave permeability, making it an ideal material for radar shields. Using it to manufacture insulating components in instruments, motors, and electrical products can enhance the lifespan and reliability of the appliances.
Volume resistivity
(Ωcm) Dielectric Strength
(Dielectric Constant) KVmm-1
60Hz Power Factor
Arc-resistant (60Hz)
（S）
1012～101415-203.0-4.40.003125
V. Unique Thermal Properties
UPR-FRP has a thermal conductivity of 0.3-0.4 Kcal/m·h·°C, which is only 1/100-1/1000 of that of metal, making it an excellent insulating material. Windows and doors made from it are the fifth-generation new energy-saving building materials. Additionally, the linear expansion coefficient of FRP is also very small, close to that of general metal materials, so the connection between FRP and metal does not suffer from thermal expansion stress, which is beneficial for bonding with metal substrates or concrete structures.
Six, Excellent processing technology performance
UPR boasts excellent processing characteristics with a simple manufacturing process, allowing for one-time molding. It can be formed at room temperature and pressure or cured through heating and pressure, without generating low-molecular-weight by-products during curing, resulting in a more uniform product. Due to its superior processing properties, it has been widely used in recent years for the production of art crafts, imitation marble products, polyester paint, and other non-glass fiber reinforced materials.
Section 7: Good designability of materials
UPR-FRP is a composite material with UPR as the matrix and glass fiber as the reinforcing material, both of which are processed and formed in one step. Therefore, FRP is not only a material but also a structure. Designability encompasses two aspects: (1) Functional design; by selecting appropriate UPR and glass fiber, various specialized FRP products can be created, such as: corrosion-resistant products; products with resistance to short-term high temperatures; translucent panels; fire-resistant and flame-retardant products; UV-resistant products, etc. (2) Structural design: various product structures can be flexibly designed according to needs, such as fiberglass windows and doors, fiberglass grates, fiberglass pipes, fiberglass channels, and fiberglass tanks.
No material is万能, and FRP is no exception. Firstly, FRP has many inherent differences compared to metals, such as metals being isotropic materials while FRP is anisotropic. Under stress, metals generally undergo two stages: elastic deformation and plastic deformation, whereas FRP typically lacks a significant plastic deformation stage, has no yield point, and exhibits delamination during loading, making it prone to sudden fractures under overload. Secondly, FRP has a lower modulus of elasticity, 10 times less than steel, so products requiring high rigidity must be carefully designed. Thirdly, FRP's heat resistance is far inferior to that of metals, and to date, its long-term operating temperature is limited to below 200°C.
