| 摘要 |
<p>MULTILAYER PACKAGING FILM This invention relates to a co-extruded multilayer film and particularly for vacuum packaging food products. A vacuum packaging film is provided comprising at least two co-extruded layers, namely, a bonding layer comprised of a material selected from the group consisting of low-density polyethylene, highdensity polyethylene, linear low-density polyethylene, ethylenevinyl acetate copolymer with a vinyl acetate content of 3% to 9% by weight, ionomeric resins, and a mixture thereof; and a complementary layer comprised of an ethylene vinyl acetatecopolymer, wherein the vinyl acetate content is in the 15% to 26% range, by weight, the remainder being ethylene; said film being cross-linked by radiation. The film is preferably radiated at a lower level than 20 MRad. The film is adapted to resist high stretch ratios during the packaging process, so that packaging of bodies with projecting portions or cavities is possible, without breaking the film.</p> |
