| 摘要 |
A tubular bag, of a composite film (1) is formed to hold mortar compositions (2) and has an inner ply (8), enclosing the mortar composition. The inner ply (8) is formed by a polyethylene film (3) and a polyamide film (4). A metal foil (5), especially an aluminum foil, surrounds the inner layer (8) and is enclosed by a stretched plastics material film and forms an outer ply (9) of the composite film (1). Accordingly, the tubular bag of the composite film (1) has a long shelf life.
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