Problemsolving in Lamination problems

Problem Bubbles in Lamination
Possible causes
* Low nip pressure preventing proper wetting of secondary web (Action: Increase nip pressure)
* Too soft a nip roll (Action: Solid rubber back up roll is preffered over sleeve system )
* Too much agitation of adhesive resulting in foam (Action: Slow pump down)
* Improper mixing of adhesive which may allow for more carbon dioxide gas formation resulting in out gassing. Especially on two high barrier films(Action: make sure scale is accurate)
* No smoothing bar(Action: Keep smoothing bar clean)