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Saran polymers, polyvinylidene chloride (PVDC)/vinyl chloride copolymers, have long been known for excellent barrier characteristics against both water vapor and oxygen permeation.
This paper covers the development of a new high-barrier PVDC copolymer film (HBPVDC) for lamination use. The film is about ten times more resistant to oxygen transmission and about five times better a barrier to moisture passage than regular Saran film.
Laminations including HBPVDC films as the barrier ply offer a transparent alternative to foil and metallized structures. In addition, HBPVDC laminations have excellent flex performance characteristics while maintaining barrier properties.
Structures can be designed for cooking foods in a microwave oven or in retort pouches. Food packages in HBPVDC laminates may also be used in conjunction with metal detectors for tramp metal detection.
Applications of high-barrier laminates include snack food, drug, and pharmaceutical packaging; retort pouches for food and medical packaging; and bag-in-box packaging for liquids and industrial uses.
flexible packaging, adhesives, bags, barriers, barrier properties, copolymers, laminates, medical packaging, metallized packaging, pharmaceutical packaging, plastic film, polyurethane, polyvinylidene chloride, retort pouches, seals, shrink-stabilized packaging, package sterilization
Research leader, Dow Chemical U.S.A., Granville Research Center, Granville, OH