| 摘要 |
<p>A transparent multilayer structure (20, 21, 31, 31') is disclosed which may be used as a flexible self-supporting container (30) for a flowable food product such as fruit juice, cheese, milk, tomato juice, soup and the like. The transparent multilayer structure (20, 21, 31) possesses superior barrier properties to oxygen, water vapor and aromatic gases. The multilayer structure (20, 21, 31) may include an exterior layer (22, 22') having a metal oxide deposition (24, 24') laminated to an interior layer (28, 28') through use of an adhesive (26). In one embodiment, the metal oxide (24, 24') is SiOx where x has a value between 1.5 and 2.2 thereby allowing for a transparent multilayer structure (20, 21, 31). The metal oxide (24, 24') may be deposited on the exterior layer (22, 22') through a number of various methods. An exemplary method is plasma-enhanced chemical vapor deposition. The exterior layer (22, 22') may be biaxially oriented PET and an interior layer (28, 28') may be a blend of LLDPE and LDPE. A barrier layer (27, 27') and a polyolefin layer (29, 29') may also be included in the transparent multilayer structure (20, 21, 31). The barrier layer (27, 27') may be EVOH, PEN, liquid crystal polymers or the like.</p> |
