Laminating machines allow to join different webs creating a single web with multi layer structure. Laminators can be duplex (for combining 2 layers) or triplex (for combining 3 layers). Solventless laminators use a bicomponent adhesive, other laminators use solvent based or water based adhesives. Combi laminators are flexible machines designed for different types of laminations (solvent based, water based or solventless).