Twin wall polycarbonate sheet Twin wall polycarbonate hollow sheets are manufactured under currently advanced technology of Germany and Japan. They have excellent physical, mechanical, electric as well as hot property which explains their high reputation in building and decoration industry. They are sold all over China, making great contribution to people's beautiful life. Specification for the product: Width:2100mm Thickness:4.0mm,6.0mm,8.0mm,10.0mm Length:5800mm,11800mmColor: clear, grass green, lake blue, blue, brown, opalFeatures of the product: Light transmission:35 80% Weather resistance: The UV layer on the surface can prevent the corrosion of ultraviolet to ensure long-lasting weather resistance Sound insulation: The hollow structure has a good sound insulation effect and the average sound insulation of a 10mm sun panel is 20dB Impact resistance: The impact resistance strength is 250 times of ordinary glass and 30 times of organic glass Fire retardant: Through national GB8624-97 test, their fire retardant is regarded as Grade B2 without fir drop or poisonous gas. Portability: About 1/15 of ordinary glass with the same thickness Temperature resistanceApplicable in the range from -40 to +120 Heat insulation: Heat conduction coefficient is lower than ordinary glass with a better heat insulation and preservation effect. Application scope: Roof glazing, canopies and interior decoration for industrial, civil& public buildings(e.g.railway and metro station roofing) stadium, gymnasium, clubs and recration centers(e.g.roofing for sunroom, swimming pool and conservatory) Agricultural greenhouses and raixing sheds. Light box, sign, pop, advertisement boards. Lighting roofs for waiting at railway station, the bus stop and air harbour of modern cities