Herma’s new multi-layer pharmaceutical adhesive 63Mps solves many challenges in the labelling of delicate tubes, bottles, and ampoules, the company says.
As these cylindrical pharmaceutical products have small diameters of 15ml or less, huge restoring forces act upon the adhesive. As a result, labels can unintentionally peel off, stick together, or even fall off.
Additional obstacles in pharmaceutical labelling are cool environments and the fast application of labels using high-speed systems. Excellent initial tack is therefore essential.
Because the pharmaceutical industry favours plastic containers, migration is becoming increasingly important for the packaging of medicines.
But this is no longer a problem thanks to the 63Mps adhesive's multi-layer technology, which allows for the simultaneous application of two adhesive layers, the firm says.
'The two distinct layers do not mix but instead remain stable – even if the self-adhesive material or the label is stored for a long time or subjected to very high pressure,' said Dr Ulli Nägele, Head of Adhesive Material Development at Herma.
'Thereby, we succeed in resolving the contradiction between two qualities that used to exclude each other – e.g. excellent migration characteristics and very good adhesive properties.'
Another advantage of the multi-layer technology is that the application of the adhesive is even and consistent.'It is important to prevent fluctuations in adhesive application, especially in tasks as demanding as pharmaceutical labelling,' said Dr. Nägele. 'If not enough adhesive is applied, the tack is no longer sufficient.'
The new 63Mps adhesive is available in combination with a range of white paper and film materials – among them materials that are suitable for reliable wrap-around labelling owing to their suppleness.