The production of our thermoforming barrier films is implemented in two different processes: blow extrusion to produce blown films and cast extrusion for casting the films. The choice of process depends on the desired efficiency, the final application and the required film properties, such as film thickness, gas barrier level, film strength and sealing capabilities.
Cast extrusion lines are extremely economical for large batch sizes and score well when it comes to producing composite films with a high level of transparency and thickness.
The efficient cooling process makes them particularly suitable for thermoforming applications. If, on the other hand, formats and film thicknesses are to be used, for example, as lid films, the flexibility of blow extrusion as part of our production is most advantageous due to its capability of speedy format changes. The systems’ lower cooling rates result in more crystalline films that can be produced with a particular stiffness.
ALLVAC’s response to the trend towards multilayer systems is the coextrusion line, which has been integrated in production recently, allowing the manufacture of composite films with up to 11 layers in accordance with the latest formulas. With its modern and sustainable machinery, ALLVAC can thus cover the entire spectrum of barrier films for packaging in food production.