HERMA Self-adhesive Materials division unveils new PP label film

HERMA is continuing to expand its range of films using innovative multi-layer adhesives and the new polypropylene film HERMA PP white solid tc (grade 971). The product is especially suitable for applications requiring the label to peel off without leaving a residue. This property is achieved by applying a primer with outstanding adhesive bonding to the reverse side. HERMA PP white solid tc is used to produce highly attractive, glossy opaque labels, which for recycling reasons are most widely used on PP surfaces. According to HERMA sales director Ralf Drache: "Because they are not prone to tearing, solid films are used primarily for sealing labels. A further benefit lies in the films' greater strength, which facilitates reliable application of the labels. Not only that, but the use of white pigments in solid films creates a much whiter impression than foamed films for example." The special surface coating ensures supreme printability when classic methods are employed, including UV flexo and UV letterpress. This quality predestines the film for labels with a strong visual appeal, as required typically for cosmetics and household cleaning products. The new film's good resistance to water, oils, chemicals and weathering, alongside its suitability for late-stage thermal transfer printing, also opens up a broad range of uses, including delamination applications.

Reduced die-cutting pressure
The standard coating for the new film is the HERMA adhesive 62Xpc. It is a multi-layer adhesive that offers excellent processing parameters – a major bonus for film applications in particular. The adhesive coating applied by the multi-layer process "bursts" faster, for example, and thus facilitates the die-cutting operation during label production. Among other things, the die-cutting pressure can be decreased by 15 to 20 percent. This not only reduces wear, but also contributes to raising production machine output. With this adhesive, furthermore, cohesion – the internal force that holds together the adhesive layer – has been significantly increased. Since practically no adhesive bleeding takes place as a result, the 62Xpc adhesive offers outstanding and reliable processability in the production environment, without exposing the user to any compromises in terms of high initial tack and outstanding final adhesion. On the contrary, in many cases the 62Xpc coating provides better adhesive properties than comparable single-layer adhesives.