Nowadays an aqueous adhesive is applied to the workpiece, dried, and then thermally activated in the press. The following adhesive systems are currently in use:
In some cases, films precoated with adhesives are now used, or an adhesive film is inserted in order to create a binding material. A very wide range of adhesive types can be used provided they fulfil the requirements of the process and are suitable for the bonding involved and the use to which the object is to be put.
PU dispersions
Use: thermoplastic films
Processing: mostly single component
(self-cross-linkers) or two-component (isocyanate cross-linkers)
Characteristics: very good strength levels
EVA dispersions
Use: thermoplastic films Processing: mostly two-component (isocyanate cross-linkers) Characteristics: moderate strength
Reactive artificial resin polymerisers
Use: veneers only
Processing: single component (self-cross-linkers)
Characteristics: excellent strength levels
UF condensation resins
Use: veneers only
Processing: mostly single component with in-built hardener
Characteristics: excellent strength levels
