At 70℃: For some specially formulated low-shrinkage-temperature POF shrink films, the shrinkage rate can reach around 35% - 40%.
At 90℃: The shrinkage rate of the aforementioned low-shrinkage-temperature POF shrink film can reach around 42% - 45%.
At 100℃: Ordinary POF shrink film begins to show significant shrinkage at 100℃, with a shrinkage rate of around 45% - 55%; while some low-temperature heat-shrinkable POF shrink films can achieve a shrinkage rate of 65% - 72% at 100℃.
At 120℃: At this point, the shrinkage rate of POF shrink film further increases, with a lateral shrinkage rate of around 55% - 58% and a longitudinal shrinkage rate of around 52% - 55%, and an overall shrinkage rate of around 60% - 70%.
At 125℃ - 140℃: For general POF shrink film in this temperature range, both the longitudinal and lateral shrinkage rates can reach around 60%.
In addition, POF cross-linked film, through cross-linking modification, has better shrinkage performance and can achieve the ideal shrinkage effect within the temperature range of 100℃ - 150℃, with a shrinkage rate that can be increased to 70% - 85%. The shrinkage rates of POF shrink films produced by different manufacturers, as well as those of different thicknesses and formulations, may vary to some extent.
