Sealed Air Corporation
OPAQUE, HEAT SHRINKABLE MICROLAYER FILM

Abstract:

A microlayer is provided having a pigment that may include carbon black particles ranging from about 25 nm to about 200 nm in diameter and/or titanium dioxide (Ti02) particles ranging from about 54 nm to about 390 nm in diameter. Such a microlayer may be used in a film that has a core layer adjacent to a substrate layer, which is itself adjacent to an outer layer. The core layer may one or more first multilayers having at least one of carbon black particles ranging from about 25 nm to about 200 nm in diameter and Ti02 particles ranging from about 54 nm to about 390 nm in diameter. Such a film is characterized by an opacity of at least about 90%. A multilayer core layer will result in a film having an Elmendorff tear strength of at least about 27.9 g.