Polycarbonate PC sheet has high impact resistance,max. 3kg/cm, it is 250-300 times as common glass,is 20-30 times as acrylic sheets,is 2 times as toughened glass; 85%-91% Light transmittance rate,it can be comparable with glass; Weatherability,the surface of sheet has anti-ultraviolet co-extruded layer,can avoid yellowing,It keeps all the physical index stability form -40°C~130°C.It will never be brittle in -40°C,nor be softened in 137.3°C; Excellent flammability resistance,it is strictly in accordance with European Union ROHS instruction and UL safety standard,UL94 fire retardance grades up to level V0,level  V2, level HB.