Table 4 also contains the reference values for metallized BOPP A and B, which are a lot lower than the forces obtained for their AlOx coated opponents and, furthermore, did not show removal of the BOPP skin layer along with the metal coating.
Peel tests were additionally carried out for the AlOx coated PET and the AlOx coated 5 layer BOPP film coextruded with a different polymer as skin layer