Flexible Packaging Adhesive

The adhesives are either polyurethane based or polyester based with poly isocyanate based additives. These adhesives are of high molecular weight and generally exhibits good initial bond ( Green Bond ) which goes on to become excellent after curing the laminate typically between 48 to 72 Hours.
Adhesive coating weights are normally between 2.5 to 4 GSM depending on kind of substrate area of print etc. While there are many applications for flexible packaging laminates, there are relatively few key performance requirements that they all share. The adhesive must have excellent clarityand bond strength as well as be resistant to heat and humidity.