| 摘要 |
The present invention refers to a compound film (1) comprising at least a heat-sealable inner layer (2), a heat-resistant outer layer (3), and a barrier layer (4) forming a barrier to corrosive gaseous species. It is characterized in that the barrier layer (4) comprises one primary barrier layer (6), one secondary barrier layer (7), said primary barrier layer (6) comprising a polypropylene film (8) on which a layer (9) of a material selected from the group consisting of a metal, a metal oxide, or a silicon oxide is deposited, and said secondary barrier layer (7) comprising a material selected from the group consisting of a metal, a metal-containing material, a metal oxide-containing material or a silicon oxide-containing material. |
