Typical Formulation Ingredients
Phase
Ingredient
Parts by weight
A
Modified cycloaliphatic epoxy (Uvacure® 1534, Solvay)
A
Tripropylene glycol (Dow Chemical)
A
Photoinitiator (Uvacure® 1590, Solvay)
Typical Properties
Adhesion, t-peel (polyethylene, polyester, BOPP, polycarbonate, aluminum, and steel)
Resulting Properties
The above table gives a starting point formulation for a laminating adhesive for substrates that are not transparent to UV light. Laminations can be done immediately after UV exposure. Cure dosage was 33-75 mJ/cm2. Full cure properties were developed after 60 mins. The formulation exhibited good adhesion to polyethylene, polyester, BOPP, polycarbonate, aluminum, and steel.
Line speed can be adjusted by using UV lamps of different intensity. These adhesives were developed primarily as low VOC laminating systems but offer a number of potential advantages over solvent-based, waterborne, and solventless adhesive systems.