polycarbonate sheet1) Light transmission: 36 - 88% 2)Ultraviolet-resistant co-extruded film on the surface 3) Sound insulation: the hollow structure has a good sound insulation effect and the average sound insulation of a 10mm sun panel is 20dB 4) Impact resistance: the impact resistance strength is 250 times of ordinary glass and 30 times of organic glass 5) Fire retardant: through national GB8624-97 test, their fire retardant is regarded as grade B2 without fir drop or poisonous gas 6) Portability: about 1/15 of ordinary glass with the same thickness 7) Temperature resistance: applicable in the range from -40 to +120°C 8) Heat insulation: heat conduction coefficient is lower than ordinary glass with a better heat insulation and preservation effect 9) Application scope: roof glazing, canopies and interior decoration for industrial, civil and public buildings (railway and metro station roofing) stadium, gymnasium, clubs and recreation centers (roofing for sunroom, swimming pool and conservatory) 10) Agricultural greenhouses and raising sheds 11) Light box, sign, pop, advertisement boards 12) Lighting roofs for waiting at railway station, the bus stop and air harbor of modern cities