CALIBRE™ 503-5 tinted polycarbonate resin is specially designed for multi-wall sheet extrusion. Its high melt strength allows effective calibration of a wide range of multi-wall sheet structures from low to medium complexity, such as two to five wall sheets. CALIBRE 503-5 is specially designed to offer a significantly better sheet surface quality at higher line speeds than a standard linear polycarbonate resin such as CALIBRE 302-5, and has a reduced tendency to display chatter marks. CALIBRE 503-5 is UV stabilized but sheets for outdoor applications require a protective UV-absorbing cap layer. It is recommended to coextrude a 50 micron thick cap layer from CALIBRE 320UV.

Main Characteristics:

• High melt strength: production of low to medium complexity multi-wall sheets

• Improved sheet surface quality

• Excellent optical properties: reduction in chatter marks

Applications:

• Multi-wall sheet extrusion