High-Clarity Shrink Film (Oriented)

Oriented, high-clarity shrink film is used to protect and display high-value consumer goods. It is distinguished from regular shrink film by its superior clarity and appearance as well as increased shrinkage properties and higher stiffness. Goods are packaged by wrapping the film loosely around the goods, sealing the film to make a completely enclosed bag, and then shrinking the film in a shrink tunnel or oven. Small holes may be poked in the film before wrapping to allow air to escape while the film is shrinking. As in industrial shrink film, heat causes the polymer molecules to relax, causing the film to return to its original unoriented size and shrink tightly around the packaged goods. Since the polymer molecules in oriented shrink film are much more highly oriented, greater shrinkage may be obtained. Boxed software and stationery products are often wrapped with high-clarity shrink film. Ice-cream cartons and other food products are also wrapped in high-clarity shrink film. Optical properties, seal properties, shrinkage, and holding force are key requirements for oriented shrink film. These structures are normally biaxially oriented films of LLDPE and PP.

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