| 摘要 |
<p>A container for volatile substances, which has at least one region closed by a multi-ply mated film in which a plurality of outer plies (1-5) can be identified which constitute an impermeable barrier for the volatile substance, and which is detachable from the permeable ply (6). In order to allow the separation of the barrier layer from the permeable ply (6) a coextruded element, which is substantially composed of three plies, is provided: respectively, an outer polyethylene (4), an intermediate EVOH ply (5), and an inner polyethylene ply (6), which acts as a permeable ply. In order to be sure that separation always occurs between the EVOH and the inner polyethylene layer, a bonding resin (9) is interposed between the outer polyethylene ply (4) and the EVOH ply (5), while a peelable resin (10) is extruded between the EVOH ply (5) and the inner polyethylene ply (6).</p> |
