Multi-layer flexible stretch/shrink film for tray overwrap

Abstract

A multi-layered thermoplastic polyolefin film having an improved combination of physical characteristics, and methods of making and use. The multi-layered film exhibits enhanced heat seal strength, improved shrinkage performance, flexibility, and versatility on packaging equipment. The addition of ethylene-vinyl acetate (EVA), which is crosslinked during the manufacturing process, contributes to improved bubble stability and provides a significantly wider operating window for use on various types of packaging equipment. Preferred five-layer embodiments of the film include: a core layer of very low-density polyethylene (VLDPE) blended with linear low-density polyethylene (LLDPE); two optional adjacent intermediate layers of EVA blended with VLDPE blended with LLDPE and additives; and two outer layers of EVA blended with VLDPE and additives.

Dependencies are inferred from the claim text.