The term FRP is often used interchangeably when referring to GRP, a broader generic term more commonly used for engineering materials used in a wide range of industrial applications. The term FRP is often used interchangeably when referring to GRP.
What is GRP?
GRP stands for Glass Reinforced Plastics. It is also known as glass fiber, composite plastic, or FRP. it is strong, extremely light, and versatile. the behavior of GRP is different from that of traditional thermoplastics used in everyday products. This means that it has properties that can be used in a range of applications in many industries.
What is FRP?
FRP stands for Fiber Reinforced Polymer. FRP is a composite material formed from a polymer matrix reinforced with fibers. While the fibers used are usually glass fibers, such as GRP, other fibers such as carbon, aramid, or basalt are also used.
What is Fiber Reinforced Plastics used for?
GRP is used in a range of different applications. In many industries, products made partially or completely from GRP are useful. For example:
1. Non-slip protection for refurbishing wet and dry floors
2. Handrails
3. Sports equipment such as kayaks
4. Electronic enclosures
5. Safety grating for industrial and public areas
6. Helicopter rotor blades and wind turbine blades
7. Water pipes or drain covers
What are the properties of Fiber Reinforced Plastics?
GRP has many valuable properties that make it very useful in industries around the world. These properties include
Thermal insulation
FRP has a low thermal conductivity of 1.25 to 1.67 kJ/(mhK) at room temperature, 1/100 to 1/1000 that of metal, making it an excellent thermal insulation material. In the case of transient ultra-high temperature, it is an ideal material for thermal protection and ablation resistance and can protect the spacecraft to withstand the high-speed airflow above 2000℃.
High strength to weight ratio
The relative density is between 1.5~2.0, only 1/4~1/5 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 that of advanced alloy steel.
Corrosion resistance
FRP is a good corrosion-resistant material, with good resistance to the atmosphere, water, and general concentration of acids, alkalis, salts, as well as a variety of oils and solvents. It has been applied to all aspects of chemical corrosion resistance and is replacing carbon steel, stainless steel, wood, non-ferrous metals, etc.
Good electrical properties
It is an excellent insulating material, used to make insulators. Good dielectric properties can still be protected under high frequency. Good microwave permeability has been widely used in radar radome. Good heat and sound insulation effect.
Easy to mold
① The molding process can be flexibly selected according to the shape, technical requirements, usage, 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 not easy to mold, highlighting its process superiority.
What are the production methods of Fiber Reinforced Plastics?
Basically, there are two major categories, namely wet contact molding and dry pressurized molding. If we divide by process characteristics, there are hand paste molding, RTM method, lamination molding, molding, extrusion and pulling method, winding molding, etc. Hand- glued molding includes a bag-pressing method, hand-gluing method, a spraying method, wet-gluing low-pressure method, and mold-free hand-gluing method.
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