Laminated Cast Film

Borealis offers a range of PP-based material grades that are very well-suited for lamination with aluminium or other plastic films (e.g. PET, PA, PE).

These laminated cast films combine multi-material structures with other plastic or non-plastic substrates. The great advantage of multi-layer film structures is that they synergistically combine the properties of different components in order to optimise packaging performance, functionality and cost.

Laminates are used in several types of packages such as stand-up pouches and vacuum-formed packages. Typical products that use laminated film packaging are:

• coffee,
• milk,
• fruit juice,
• cheese or meat slices,
• shampoo pouches or other toiletries,
• pharmaceutical products.

An innovative use of laminated cast film is to produce polymeric stand-up pouches by substituting aluminium. Laminated film processed for polymeric stand up pouches are substituting aluminium, white tin and glass bottles, trays, cans and boxes. The typical structure for a stand up pouch is a Silicon Oxide (SiOx) coated PET, PA or PP laminate. The PP acts primarily as a sealing layer and provides the tenacity and body of the film.

Benefits of our copolymers

Borealis' high molecular block copolymers, BB213CF and BA110CF, are used in all kinds of food packaging (e.g. soups, sauces, solid food, pet food) and for detergent and cosmetics packaging.

Random copolymers are another commonly used material. They are propylenes with statistically incorporated C2 monomers. Borealis random copolymers offer:

• high softness
• excellent heat sealing properties at low gate sealing points
• extremely low stress whitening
• the best optical properties (gloss and haze) of all PP grades

Heterophasic copolymers

Heterophasic copolymers incorporate an ethylene propylene rubber during a separate phase of the polymerisation process. Borealis heterophasic copolymers offer:

• a matt surface,
• low transparency,
• high toughness,
• good stiffness,
• an extremely wide temperature range (from freezing to sterilising).