Low gas permeability(oxygen). Low moisture permeability Low hydrophilic properties Heat sealable and sterilisable Constructed of appropriate material Resistant to penetration by fats,oils and other food components retorting, storage and distribution( i.e. tearing, pin-holding, fatigue, impact and abrasion) Absence of solvent residues, Chemically iner polypropylene films the film can be used for foods. Bonding material for the laminates must not migrate into the foods. High light barrier.