| 摘要 |
The packaging material comprises five layers bonded face-to-face, the layers in sequence being a biaxially-oriented rupture-resistant layer (18), an adhesive layer (16), an aluminium foil (14), a polyolefine layer (12) modified by a fused ring organic acid anhydride and a polyolefine heat sealable layer (10). Production of the packaging material first involves coextruding a deuplex film comprising layers (10) and (12). This film is then bonded to one side of the aluminium foil (14) in a roll nip under heat and pressure, the foil being brought into contact with the anhydride-modified layer (12). Finally, the foil-embodying laminate is completed by bonding the biaxially-oriented layer (18) to the exposed other surface of the foil (14) using an adhesive layer for instance comprising a polyester urethane. |
