Glass Reinforced Plastic (GRP) based on vinyl ester resin features the following characteristics:
One: Lightweight and High-Strength
FRP has a density of 1.4-2.2 g/cm³, which is 4-5 times lighter than steel, yet it maintains considerable strength, with its specific strength surpassing that of structural steel, hard aluminum, and cedar wood. This is of great significance for products in the aviation, aerospace, rocket, missile, military, and transportation industries that require weight reduction. For instance, the Boeing 747 jetliner utilizes 2.2 tons of FRP components in its main structure, effectively saving fuel, increasing speed, extending flight duration, and enhancing payload capacity.
Good corrosion resistance.
UPR-FRP is a superior corrosion-resistant material that withstands 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 fields of the national economy, such as petrochemicals, agriculture, dyes, electroplating, electrolysis, smelting, and light industry, where it plays a role that no other material can replace.
3. Excellent electrical properties
UPR-FRP has excellent insulation 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 covers. Using it to manufacture insulation components for instruments, motors, and electrical products can enhance the lifespan and reliability of the electrical appliances.
Volume Resistivity
Di-electric strength (Ωcm)
(KVmm-1) Dielectric Constant
(60Hz) Power Factor
Arc-resistant (60Hz)
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1012～101415-203.0-4.40.003125
Unique thermal properties
UPR-FRP has a thermal conductivity of 0.3-0.4 Kcal/mh°C, just 1/100-1/1000 of that of metal, making it an excellent insulating material. Windows and doors made from it are part of the fifth-generation energy-saving building materials. Additionally, FRP has a very low coefficient of linear expansion, nearly matching that of general metals. This ensures that when connected to metal substrates or concrete structures, FRP does not experience stress due to thermal expansion, which is beneficial for bonding with these materials.
Six: Excellent processing technology performance
UPR boasts excellent processing properties, featuring a simple manufacturing process that allows for one-step molding. It can be formed under room temperature and pressure, or cured with heat and pressure, and during the curing process, it doesn't generate low molecular weight by-products, resulting in a relatively uniform product. Due to its superior processing properties, it has been widely used in recent years for the production of craft items, marble-like products, polyester paints, 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 go. Therefore, FRP is not just 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 sheets; fire-retardant products; UV-resistant products, and more... (2) Structural design: various product structures can be flexibly designed according to requirements, such as glass fiber reinforced plastic windows and doors, gratings, pipes, channels, and tanks.
No material is all-powerful, 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 typically undergo two stages: elastic deformation and plastic deformation, whereas FRP generally does not exhibit a significant plastic deformation stage, lacks a yield point, and shows delamination during loading, often leading to sudden断裂 under overload. Secondly, the modulus of FRP is much lower than that of steel, ten times less, so products requiring high rigidity need careful design. Thirdly, the heat resistance of FRP is significantly lower than that of metal materials. To date, the long-term service temperature of FRP is still limited to below 200°C.
