... Length: 6000mm/12000mm 3)available in 4mm-18mm Sunshine PC sheet/polycarbonate sunshine sheet Introduction:Polycarbonate hollow sheet is made ... weather-resistance, good impact-resistance, heat insulation, soundproof, lighting, anti-UV and fire retardation, etc., and the sheet as very ... and is the best choice for soundproof. Taking 6mm pc hollow sheet as an example, the average noise attenuation is ...