Solvent-based polyurethane adhesives-main advantages and disadvantages

Solvent-based adhesives’ advantages:

Compared to solventless adhesives:

- higher application weights possible.

- higher molar mass of adhesive structure possible.

- higher amount of polyesters based on aromatic structures possible.

This leads to properties not available by other lamination processes:

- high bond strength

- high initial tack

- good bearing capacity

- high temperature resistance

- highly hydrolysis resistance

Disadvantages compared to solvent-free adhesives:

- porous material not processable

- lower processing speed

- higher processing cost including equipment, labour, protection

Lamination with solvent-based adhesives:

- solvent based adhesive is coated on carrier substrate

- solvent is dried from the surface of the carrier substrate

- coated carrier is pressed together with 2^nd substrate