Lamination machines are used to join different webs creating a single web composed of a multi layer structure.
A duplex laminator can join 2 layers of web, a triplex lamination machine can join 3 layers together in 1 pass.
Solventless laminators employ a 2 component glue. Combi laminators, (dry and wet bond laminators) use solvent base or water based glues.
Coatings used in packaging industry are various ( i.e Cold and hot seal coating, hot melt and wax coatings).