Mainly for this reason, simultaneous orientation process will maintain or even gain a higher market share.ĥ.1. In particular, shrink characteristic is an important quality criterion, since in subsequent film processing, almost all BOPA film is laminated with polyethylene (PE) film and a lower isotropic thermal shrinkage is required to avoid warping and curling. This is playing an important part for BOPA, as quality demands are constantly increasing. In future, lines with the simultaneous LISIM® technology could gain importance, as not only can overall performance data of sequential lines be outranked but also at the same time considerably improved product properties are attainable. Such restrictions are attributable to the high mechanical complexity and maintenance intensity of Pentagraph technology. Existing simultaneous film stretching lines have widths of max. The typical stretching ratios are about 3 × 3. Today’s sequential film stretching lines feature working width 5 m, production speed 180 m/min and output 920 kg/h (= 7000 tpa). Trend of world capacity – BOPA (name plate capacity).
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