Retort pouches – safe packaging for sterilization and pasteurization

Products that undergo thermal treatment after filling place particularly high demands on their packaging. During sterilization processes in autoclaves or pasteurization, heat, pressure, and time all act on the bag simultaneously. Retort bags and retort pouches are specially designed to withstand these stresses and ensure maximum product safety and stable shelf life.

As a manufacturer, we develop and produce retort pouches ready for series production for industrial applications – from food and convenience products to baby food and pet food. Our solutions are designed for real production conditions and enable the safe implementation of thermal processes.

Retort pouches for many applications

Retortable pouches are used wherever products need to be sterilized or pasteurized after filling. Typical applications include, for example:

Vegetable products such as sauerkraut, beans, or corn
Fish products such as tuna or seafood
Meat dishes in sauce
Rice dishes, pasta, and ready meals
Soups, broths, and sauces
Baby food
Pet food and wet food

Thanks to their low weight and flexible formats, retort pouches are an efficient alternative to traditional cans or glass packaging.

Castelli® monomaterial retort pouches

Our Castelli® retort pouches made of monomaterial combine high technical performance with a recycling-oriented material concept. They are specially developed for industrial series production and enable reliable scaling from test runs to large-scale production.

The most important advantages:

Suitable for demanding sterilization processes in autoclaves
Stable seal seams and defined seal windows
High pouch integrity after temperature and pressure exposure
Designed for fatty, acidic, or chunky products
Tested shelf life under real production conditions

This allows even complex retort and pasteurization processes to be implemented reliably.

Retort packaging in the context of the PPWR

The European Packaging Regulation (PPWR) increases the requirements for recyclability and design for recycling. This is a particular challenge in the retort sector, as thermal processes require very resilient material structures.

Monomaterial concepts offer a future-oriented approach here. They reduce material complexity and support recycling-oriented packaging solutions without compromising the necessary process reliability in the autoclave.

Consulting for retort bags and retort pouches

The right retort packaging always depends on the product, the thermal process, and the desired shelf life. We support you in selecting the right material structure and work with you to develop a safe solution for your application.

Find out more here: Retort pouches