Herma expands speciality product range

Packaging Solutions

Practical and very popular, sealing labels have to satisfy highly diverse and sometimes conflicting requirements. Seeking to find the best possible formulation to meet these needs, Herma has now originated 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,’ commented Dr Ulli Nägele, 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 sealing 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 characterised 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 ageing. As an absolutely migration safe adhesive, it has also been unconditionally approved for direct food contact.