| 摘要 |
<p>A gas-barrier multi-layer film comprising at least an outer heat-sealable polyolefin layer, a core gas-barrier layer comprising one or more of EVOH and/or polyamides, and an outer bonding layer comprising one or more styrene-based polymers, characterized in that a) at least 35 % by weight, preferably at least 38 % by weight and even more preferably at least 40 % by weight of the overall film is of styrene-based polymers, b) at least part of these "styrene-based polymers" are in the form of modified styrene-based polymers, and c) said modified styrene-based polymers are present in a ratio, with respect to the weight of the gas-barrier resin of the core layer, of at least 0.1 : 1, preferably at least 0.3 : 1, and even more preferably at least 0.5 : 1. <??>The use of the new gas-barrier film as liner in the manufacture of a polystyrene/film composite allows to reclaim the entire scrap obtained in the overall process in the polystyrene substrate still obtaining composites with mechanical properties and packaging performances comparable to those of the original composites.</p> |
