New adhesives include solutions for high barrier structures and a new water-based heat seal lacquer.
March 21, 2013
by Canadian Packaging Staff
Henkel AG & Co. KGaA has revealed a full range of new adhesives and coatings specific to the flexible packaging industry.
Thanks to a very low monomer content, new solvent-free laminating adhesives from the Liofol LA 7777 family are very suitable for high barrier films that demand low CO2 formation from the adhesive. The very low monomer content of this adhesive family also makes the R40 label unnecessary.
Due to the significantly reduced monomer content and the special design of this adhesive family, converters can reduce the risk of primary aromatic amine (PAA) formation and also reduce the time required for decay of primary aromatic amines.
For example, a laminated structure containing an OPA (oriented polyamide) film typically used for cheese packaging requires more time for full cure and decay of primary aromatic amines than an OPP/OPP structure for snack food packaging. The Liofol LA 7777 series allows converters to shorten the time to compliance with food regulations. In above mentioned OPA/PE structures, primary aromatic amines are already below the detection limit after one day.
These properties represent another big step toward even safer food packaging. But Henkel’s development efforts did not stop there. The new adhesive systems have also been given a convenient long pot-life of up to 60 minutes, double the time of reference systems.
“The LA 7777 series is a great new option for the converting industry to provide even safer food packaging,” says Henkel marketing manager Regina Müller.
Heat seal lacquer portfolio enrichment
Henkel has also developed an innovative water-based heat seal lacquer for food applications whereby through a special production technology, it has become possible to completely exclude unwanted residual solvents.
This new product Liofol HS 2210-22 is a low-temperature sealing lacquer which already activates at less than 100°C. It can be applied on film, foil and paper and is characterized by a versatile range of applications, including banderoles, soap packs and coffee packs.
Liofol HS 2210-22 bridges the gap between several technologies and allows users who want to operate completely solvent-free lines to integrate heat seal technology into their converted products without the need for investment in hot-melt application technology.
For more information, visit www.henkelna.com.