What is FRP? (Features)
The FRP is an abbreviation of Fiber Reinforced Plastics; that is, composite materials of fibers and plastics.
Types of FRP
A general FRP is a combination of a glass fiber and a polyester resin. There are several types according to combinations of fibers and resins.
Types of Fibers
- Glass Fibers
- Carbon Fibers
- Aramid Fibers
- Polyethylene Fibers
- Zairon Fibers
- Boron Fibers
Types of Resins
- Polyethylene Resins
- Vinyl ester Resins
- Epoxy Resins
- Phenolic Resins
As above, FRP has diverse kinds because it is a composite material of fibers and resins. The following two types are representative.
GFRP（Glass Fiber Reinforced Plastics）
GFRP (Glass Fiber Reinforced Plastics) is made to be hard by adding polyester resins, vinyl ester resins, epoxy resins or phenol resins to glass fibers. It is the cheapest and most general among FRPs.
Features of GFRP
GFRP has the following features.
- It can make freely diverse shapes.
- It is highly weatherproofed.
- It is lighter comparing to a metal.
- It has super corrosion resistance.
- It has super electric insulation.
- The effect of insulation is excellent.
- Penetrability of radio wave is excellent.
- It has high water-proofing.
CFRP（Carbon Fiber Reinforced Plastics）
CFRP (Carbon Fiber Reinforced Plastics) has higher strength and hardness but lighter than metals such as steel or aluminum. This is used in diverse industries from sports and leisure to aerospace industry. That is, it is a proper material for cases which require strength but light weight.But this is more expensive than GFRP.
Features of CFRP
CFRP has the following features.
- Light Weight (about 1/5 of steel)
- High Hardness (about two times of steel)
- High Strength (same as or more than steel)
- High Thermal Conductivity (1/2~1/3 of steel)
- Low Heat Expansibility (1/10 of steel)
- X-ray Penetrability
- Vibration damping characteristic