The Root of the Problem

But first and foremost, Papsin said, "It is imperative that an adhesive be adequately tested for every laminate structure." This testing includes ink compatibility, visual appearance, peel adhesion, and desired resistance properties.

Problem: Undercuring

When a UV or EB adhesive isn't fully cured, bond strength after application may fail standard bond testing, creating a situation where the curing environment of the adhesive lacks strength, Newell said. And, Kahn added, with undercuring comes the potential for migration of adhesive components, pigment bleed, lower bond strength, and—ultimately—product failure.