| 摘要 |
<p>A metallized multilayer film comprising a film substrate having a polymer core layer, e.g., a polypropylene homopolymer (OPP), on at least one surface of which is a polymer skin layer having a lower melting temperature than that of said core layer, the exposed surface of skin layer having been treated, e.g., flame or corona discharge treated, prior to coating to increase its adherence to other materials, the film substrate containing a metal deposit, e.g., aluminum, coated on the treated surface of the polymer skin layers, and a polymeric, low temperature sealable coating (LTSC) comprising a copolymer of about 10 to 35 wt. % of at least one alpha , beta -ethylenically unsaturated carboxylic acid, e.g., acrylic or methacrylic acid, with about 65 to 90 wt. % of ethylene, an alkyl acrylate or methacrylate, acrylonitrile, or mixtures thereof on the surface of the metal deposit. Optionally, the polymer substrate may contain another polymer skin layer on the other side of the core layer, another coating may be deposited on the surface of the film opposite that containing the metal deposit, and/or a printed ink pattern and overlacquer may be applied to the surface of the LTSC on the metal deposit or the coated or uncoated opposite surface of the film substrate. The film has excellent mechanical and barrier properties and can be used to overwrap food and non-food products such that the package has a protected metal layer and good seal strength.</p> |
