The Root of the Problem

Solution: In order to prevent lamination defects, the converter must work closely with the adhesive, the film, and the ink vendors in the design and planning stages so that adequate testing can be done.

For example: UV adhesives need to be formulated with a clear understanding of how to overcome the possible inhibition reactions when used over water-based inks, said Zubair Khan, EIC's Energy Curable Products manager. "If adhesives are not properly formulated, they could result in undercuring and lower bond strength," Khan said. "This undercuring may result in pigment bleed. As a result, the lamination bonds will be lower in those areas where there is presence of uncured adhesive. Working closely with both the adhesive supplier and a knowledgeable ink supplier can help avoid this problem."