Packaging process utilizing reclosable package having pressure-induced reclose seal which becomes stronger at low temperature

摘要

A product is packaged in a pressure-reclosable package comprising a multilayer film having a heat-sealable, pressure-reclosable inside layer. The inside layer contains a hyperbranched polyolefin having at least 70 side chain branches per 1000 carbon atoms and a density of up to about 0.885 g/cc, and/or an ethylene/alpha-olefin elastomer having a density of up to about 0.885 g/cc. The package is opened and a portion of the product removed, and a pressure-induced seal is used to re-close the package at a temperature of at least 11° C. The reclosed package is then placed in an environment having a temperature of from about −50° C to +1° C., so that a cooled pressure-reclosed seal at least doubles in strength.