The morphology, composition and properties of a commercial pearlescent and multilayer BOPP film were determined in the present study. The film was polypropylene and it was biaxially oriented as shown by FTIR spectroscopy and X-ray diffraction. FTIR spectroscopy indicated carbonate ions, EDX analysis indicated the presence of Ca element, X-ray diffraction showed the presence of calcite. The 30 µm film consisted of a core layer filled with calcite and 4 µm thick upper and lower layers without any filler and from different polymers. There were long air cavities in the core layer with aspect ratios of 23 and 19 in machine and transverse directions making the film pearlescent. The surfaces of the film were very smooth and had surface roughness in the range of 3.052 nm and 11.261 nm as determined by AFM. The film melted at 163.6 oC, had 51 % crystallinity and had 6.3 nm polymer crystals when heated at 10 oC/min rate.
pearlescent film, BOPP, x-ray diffraction, SEM, AFM, перламутровая пленка, БОПП, рентгеноструктурный анализ, СЭМ, АСМ
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