It handles a broad range of film thicknesses with no tradeoff in performance and substantial reductions in downtime for prouduct changeover. The air knife/soft box component handles a web thickness range from 20 to 150 microns. The air knife expels air in a concentrated stream at high velocity, making it effective for thicker films. The soft box usually has a screened opening that expels a higher volume of air; it works best with films less than 30 microns thick.
Cast film tooling
For pinning the web to the chill roll as the web exits the die on cast PP film lines, Battenfeld Gloucester Engineering has developed a combination air knife and soft box attachment.
Feb 29th, 2004