Seeking to find the best possible formulation to seal labels, Herma has developed the new adhesive 52C. This UV-reticulating acrylate contact adhesive (UVA) is suitable for use with a wide variety of packaging materials. It is compatible with a range of applications that present special challenges, such as wet wipes, in which oils and cleaning agents play a critical role, and does not require users to accept any compromises as regards either functionality or appearance.

“The combination of properties it offers is probably unique,” says Ulli Nägele, Herma’s head of development. “We are in a position to develop these characteristics thanks to the massive investments we have made recently in the production technology for speciality products of this kind.”

The semi-permanent UVA 52C was developed primarily for the sealing of labels applied to wet wipe pouches. It is eminently suitable, however, for both dry and moist surfaces. It does not become cloudy in contact with oil, water, solvents or cleaning agents, so that the sealing label retains its attractive appearance. In clear-on-clear applications, the adhesive remains highly transparent even after repeated peeling.

It is also characterized by especially consistent, smooth and silent peeling in conjunction with most plastic surfaces and films. At the same time, its very high cohesion prevents the formation of unsightly strands. The adhesive resists the elastic forces encountered with curved surfaces such as those often incorporated in the design of flexible packaging for wet wipes. To ensure that the labels retain their benefits for the entire life of the packaging, the 52C grade offers especially good resistance to light, heat, water and aging. As a migration-safe adhesive, it has also been unconditionally approved for direct food contact. The new adhesive 52C is most effective in combination with the label film Herma PP transparent tc (980).

“Special labels are a very lucrative business for printers, but the results depend entirely on the selected adhesive material. As ever, Herma makes an unqualified quality pledge in this respect,” insists Herma managing director Thomas Baumgärtner.