1. The base material of FRP is isophthalic acid polyester, and the PC board is ordinary polycarbonate;
2. The thermal expansion coefficient of FRP is 2.2×10-5 /cm/cm/℃, and the thermal expansion coefficient of PC is 6.75×10-5/cm/cm/℃; the thermal expansion coefficient of FRP is close to that of steel, which changes from cold to hot The relative displacement caused is less, and it is not easy to leak due to deformation. However, the relative displacement caused by the PC board is too large, resulting in tearing and deformation of the peripheral board of the screw hole, resulting in water leakage.
3. FPR has a high tensile strength of 94MPa, which can withstand a higher load similar to that of steel plates, and has strong typhoon resistance. The tensile strength of PC is 60MPa, and its ability to bear load is weak, which is quite different from the ability of steel plate to bear load, and its ability to resist typhoon is weak.
4. FRP adopts the structural form of upper and lower film and glass fiber reinforcement, so that it has good tensile and tear resistance. The particularity of the molecular structure of PC leads to poor tear resistance of the PC board, and it is easy to be punctured by metal burrs and leak water. Therefore, it cannot be fixed only with screws, and it is in direct contact with the metal. Aluminum plate is usually used to fix the PC board.
5. The lighting rate of FRP lighting tile is 50% - 85%, and that of PC is generally 85% - 91%.
6. The thermal conductivity of FRP is 0.158w/m.k, and that of PC is 0.166w/m.k. The heat insulation performance of FRP is better than that of PC boards;
7. The construction cost of FRP is due to the high tensile strength and steel degree of the plate, and its strong load bearing capacity. It can be used with steel plates on steel structure roofs with large spans and large distances. The rigidity of the PC board is poor, and the thermal expansion and contraction coefficient is large, so it is necessary to use small grids and small spacing or convex arches to increase the strength. It is not suitable for steel structure roofs with large spacing, otherwise, it is easy to dent Water accumulation, water leakage.