Triple medical applications

A flat-die coextrusion line for 3-layer film up to 1,600-mm wide manufactured for a Turkish processor has recently undergone final testing at Dolci Extrusion's Biassono facilities (Milan, Italy), The line can produce 3 different types of extrudate for medical applications: dry embossed polyethylene film; calcium carbonate filled breathable LDPE film; laminate made of PE or PP and non-woven fabric.
The plant operates at a speed of 350 m/min with an output of 800 kg/h. It includes 3 extruders - two 75-mm for the outer layers and a 120-mm for the inner layer, equipped with a pump to optimize material homogenization and reduce its residence time in the extruder - each fed with 4 ingredients through a gravimetric dosing system. The chill-roll unit is provided with a system for quick changeover of the main roll, which can be embossed or smooth depending on the application.