Thermal labelstock for foodstuffs

Herma and Koehler Paper are developing a thermal label adhesive that is approved for food and utilises a physical reaction.

Thermal papers from Koehler Paper are now used as environmentally friendly receipts in various shops. A thermal adhesive material for labels has now been developed in a development partnership. The new material from Herma is approved for food contact and the printed image is produced without chemical developers. 

In the past, thermal papers have repeatedly been the subject of discussion because they require questionable substances in order to produce a printed image. Now offers Herma a thermal adhesive material for labels that is fully approved for food contact. This is because Hermatherm nature (grade 900) is free from all chemical developers for the print image.

Labels produced on this basis can be used in all standard thermal printers. The 62Dps multilayer pressure-sensitive adhesive used by the company is Migration-proof and approved for direct contact with dry, moist and fatty foods. Thanks to the multi-layer technology, the adhesive is characterised by good adhesion properties despite its migration resistance, even in cool environments. 

Away from chemical developers

Image of packaged fruit with environmentally friendly thermal label adhesive material
(Image: Herma)

The new adhesive material was developed in close Development partnership with Koehler Paper. „According to our experience in the coating and cutting process, the handling of Hermatherm nature (900) is just as uncomplicated as conventional thermal adhesive materials,“ emphasises Herma Head of Development Dr Nicole Metzler. Despite the colourfulness and the associated lower contrast No barcode reading errors during a large test on. Corresponding labels ran through 100 per cent fault-free.

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The from Koehler Paper Blue4est thermal paper developed in-house Pro in the characteristic blue-grey colour has been used by retailers for some time for environmentally friendly receipts. The font is created at Blue4est Pro is not due to a chemical reaction to heat. Rather, it is a Physical reactionAn opaque functional layer of the paper becomes transparent under the influence of heat. The black layer underneath then becomes visible. Compared to standard, conventional thermal papers, Blue4est Pro environmentally friendly. The Print image is also resistant to environmental influences such as sunlight and moisture. According to the company, an imprint is legible for more than 35 years.

Source: Herma

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