The manufacturing techniques we can deploy include knife- or roll-over-roll, reverse roll, gravure, Meyer bar, through method, calendaring and extrusion or slot die. These are used as follows:
Knife or roll-over-roll:
The most common coating technique, either direct onto the carrier or onto a paper or filmic liner.
Gravure, Meyer Bar:
Often used for coating release or primer in low viscosity systems, and for patterned adhesives.
Calendaring and Extrusion:
Used for solventless adhesive (RR, HCM) where there is a need to melt the adhesive.
Preferred for coating where the adhesive could go through the carrier, eg cloth.
Double-sided tape in one pass with same adhesive on both sides.
A relatively new method for solvent-based or water-based adhesive, which offers better coat weight control and lower coat weights.