With thinbarrier 303, delfort is launching a recyclable barrier paper that reliably protects food during transport and storage with significant temperature and humidity extremes. The combined oxygen, water-vapor, and grease barrier maintains its functionality in the temperature range of -18 to +38 °C (-0.4 to + 100 °F).
Food is exposed to highly diverse environmental conditions along its journey: From packing at the manufacturer to delivery in a refrigerated truck, storage on supermarket shelves, and transport by consumers, temperatures and humidity often vary considerably. The period after purchase, for example, during hot summers, can be a particularly stressful period for packaged food. delfort’s thinbarrier 303 copes with these changing temperatures.
Under normal conditions, the oxygen barrier allows significantly less than 10 g/m2/day to pass through. This prevents oxidation over a long period, which can cause fats and oils to become rancid. Furthermore, the fresh aroma and flavor of the foods are preserved. The water-vapor barrier also allows less than 10 g/m2/day to pass through, in both directions. It prevents refrigerated goods such as cheese from drying out. At the same time, it prevents powdered contents such as cocoa or cappuccino mix from clumping due to moisture penetration and prevents cookies from losing their crispness. The strong barrier properties of thinbarrier 303 against water vapor are maintained even when refrigerated at 4 deg C. and are even stable when deep-freezing at -18 deg C.
The grease barrier’s strength is particularly evident under heat. It prevents fats and oils contained in the food from escaping from the packaging. This maintains product quality and hygiene, and the appearance of packaged foods. This is crucial for cheese and chocolate, among other things. The grease barrier remains stable even at temperatures up to 38 deg C, and it contains no PFAS compounds often used in the past.
Additionally, thinbarrier 303 is easy and reliable to use. Its seal strength is 8 N/15 mm, ensuring secure containment of foods. Furthermore, the high seal strength prevents packaging with thinbarrier 303 from tearing during filling, transport, or handling. The heat seal also remains stable under the demanding climate conditions described above. The paper is also suitable for a variety of vertical and horizontal packaging machines.
Despite its strong barrier properties and high stability, thinbarrier 303 is lighter than comparable barrier papers. At the same time, recyclability is ensured: thinbarrier 303 meets the criteria of the standardized test methodology of the Confederation of European Paper Industries (CEPI).