... light transimission will occur on boards exposed under sunshine.2.UA protective(50 micron anti-UV layer,10-year ... gas.5.impact resistance because the impact strength of pc sheet is 250_300 times of the ordinary glass.]6.sound insulation ... building ,departmente,hotel,stadium,school ,amusement center ,hospital,etc.2. skylight,lighting for corridors ,balcony,passages and subway entries ,walkways ...