| 摘要 |
Abstract Multilayer shet- or tube-type food casing or food film 5 The present invention for the first timo proposes a multilayer sheet- or tube type food casing or food film produced by the nozzle blast-drawing process and biaxially oriented by the triple-bubble process, which is fashioned as a food packaging having the form of shrink bags, sealable films, wrapping films or the like. This novel food casing or food film comprises at least nine layers of which an EVOH 10 layer has the form of an oxygen barrier symmetrically embedded between two PA layers intended to impart strength and in turn symmetrically enclosed by two PO layers for the water vapor barrier, and wherein the external layer is formed by a highly temperature-resistant material such as PET which on top of its excellent optical properties also enables clearly higher speeds for further processing (cycle 15 numbers) than were previously known, IWO,[ I 1,k 19 |
