A heat-shrinkable film and a method of its manufacture are provided. In an exemplary
embodiment, a polystyrene film exhibits heat-induced growth in the cross direction
of great than or equal to 5% with greater than or equal to 30% concomitant shrinkage
in the machine direction. The films may comprise crystal polystyrene, high impact
polystyrene, and/or elastomers. A method of manufacture is disclosed which includes
a post-extrusion temperature conditioning step.
