National Starch and Chemical Co., Bridgewater, N.J., has introduced PUR-FECT LOK® 34-943A, a
polyurethane reactive hot-melt adhesive. The product specially formulated for vinyl laminating,
panel-bonding and assembly-bonding includes an additive that promotes adhesion between
difficult-to-bond substrates. In order to monitor the amount of adhesive that is applied, an
ultraviolet (UV) dye also is added to the adhesive, allowing the manufacturer to view the
application level with a UV light source. The product can be applied at material temperatures of up
to 250°F by spray, roll coater or slot coater adapted for reactive hot-melt adhesives.