| 摘要 |
<p>A multilayer, preferably biaxially oriented, film suitable for processing and/or packaging cook-in foods such as ham, roast beef and poultry having an excellent combination of oxygen barrier, heat seal and optical properties comprising at least five essential sequential layers with a first layer of a copolymer of propene and at least one C2-C8 alpha -olefin having a propene content of at least 60 wt. % and preferably having a melting point <140 DEG C; a second layer of (1)a first copolymer of ethylene and at least one C4-C8 alpha -olefin (0.900 to 0.915 g/cm<3> rho ), and <1.0 dg/min. M.I.), (2) a second copolymer of ethylene with from 4 to 18%, preferably 4 to 12%, of a vinyl ester or alkyl acrylate, (3) an anhydride-modified third copolymer of ethylene with at least one alpha -olefin, a vinyl ester or an alkyl acrylate, and (4)optionally a fourth copolymer of ethylene and at least one C3-C8 alpha -olefin (<0.900 g/cm<3> rho ; and <85 DEG C m.p.); a third EVOH layer; a fourth layer like the second layer; and a fifth layer of a first copolymer of ethylene with at least one C4-C8 alpha -olefin (0.900 to 0.915 g/cm<3> rho , and <1.0 dg/min. M.I.), and a second copolymer of ethylene with from 4 to 18%, preferably 4 to 12%, of a vinyl ester or alkyl acrylate, and optionally a third copolymer of ethylene and at least one C3-C8 alpha -olefin (<0.900 g/cm<3> rho and <85 DEG C m.p.).</p> |
