Undetstanding of Anti-UV Coating
With a layer of anti-UV coated on the surface during the process of co-extrusion could prolong the lifespan of the sheet. Purpose of the anti-UV coating is to prevent ultraviolet from shining through which could cause the sheet from turning yellowish and ends with crack. Shutter Twin-wall sheet maintains an excellent transparency surface over a period of time compare to others.The Way of Anti-UV Coating：
QUV Durable Test：
|Production Mode||Yellowish fig.||Years of Yellowish|
|UV W/o anti-UV||Above △YI 40||Yellowish in short time|
|UV Stabilize anti-UV||△YI 10~15||2 ~ 3 years|
|UV Coating Normal anti-UV||△YI 3~7||3 ~ 5 years|
|UV Coating High Performance anti-UV||Below △YI 6||10 years & above|
Sheet with Anti-UV coating not only reduces ultraviolet from transmitting but also protect PC sheet against any harmful damage and prolong properties of Polycarbonate Sheet. Surface of the sheet form a protective force against factory pollution, exhaust emission from vehicles, dust and acid rain stain. It enables the sheet to maintain as new as it is.
Co-extrusion with Anti-UV coating on the surface shall effectively blocking harmful ultraviolet rays, protect against ultraviolet from transmitting which cause sheet to crack, turn yellow and effectively maintain physical properties of Polycarbonate.