prov:value
| - This is achieved by way of a film of thickness from 4 to 23 ??m, preferably from 6 to 19 ??m, and particularly preferably from 7 to 14 ??m, which comprises, alongside polyethylene terephthalate, from 2 to 20% by weight, preferably from 4 to 16% by weight, and particularly preferably from 6 to 12% by weight, of polyethylene naphthalate, and has fewer than 30 pinholes per 100 m2, and also by way of
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