The "Wide" inner lamination material is formed from a specially developed PE, "metallozene", whose key claimed benefits include uniform molecular weight, polymer chain structure and polymer morphology. Wide reportedly seals at an extended temperature range via induction heating; Tetra Pak says Wide packs will offer improved sealing and greater crack resistance than those made with current extrusion-laminated (non-film) specifications, alongside enhanced filling line efficiency.
Product manager Ian Williamson says: "Wide's introduction opens the door to the creation of new combinations of various polymer properties, including greater elasticity, a larger sealing window and improved stress crack resistance, meaning reduced sensitivity to aggressive products."