Abstract

ABSTRACTIn this study, sustainable and environmentally friendly packaging films were developed using bio‐based polyethylene (BIO‐PE) and natural plant pigments. The pigments were obtained from Rubia tinctorum (madder), Punica granatum (pomegranate), Juglans regia (walnut), Reseda lutea (yellow mignonette) and Quercus infectoria (Aleppo oak), which are known for their strong colouring properties and are widely available in the rich flora of Turkey. These pigments were blended with BIO‐PE at a ratio of 10% in the form of composites. The packaging films were produced via blown film extrusion, and their optical, mechanical, frictional and blocking properties were systematically characterized. The results showed that natural pigments significantly improved the optical properties, especially the opacity, with films containing Reseda lutea reaching the highest value of 99.77%. In addition, Punica granatum–based films exhibited a tensile modulus of 246 MPa, which improved structural integrity. The addition of natural pigments reduced the blocking force to 440 gf/100 cm2, allowing the layers to separate more easily, while the coefficients of friction ranged from 0.15 to 0.27, improving the sliding properties. These results demonstrate the potential of BIO‐PE and natural pigments to create effective and sustainable packaging solutions.

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