Barrier Properties Analysis of Polyethylene Terephthalate Films (PET) Coated with Natural Polyphenolic and Gelatin Mixture (PGM)

Abstract

The food packaging material provides protection against moisture, heat, enzymes, oxygen penetration etc. The shelf life of food can be increased by coating barrier materials on plastic films. In this work the oxygen transfer rate (OTR) and water vapour permeability (WVP) of Polyethylene terephthalate (PET) films were adjusted via coating of Polyphenols and Gelatin mixture (PGM) with different concentrations while maintaining the other properties of modified PET films. This article deals with the changes in properties of PGM coated PET films with some innovative ideas of multilayer film formulation. Polyphenolics were extracted from Terminalia Catappa (Indian almond), Camellia sinensis (Green tea leaves) and Trachyspermumammi (Ajwain). The results showed that WVP was decreased from 1.0±0 to 0.12±0.03 g/in2/day (p < 0.01) in comparison with uncoated (1.3±0.07g/in2/day). Similarly, same trend was obtained for OTR (63.5±0.02 to 38.1±0.03g/in2/day) with respect to uncoated film (82 ± 3.5). This study provides important evidence that addition of PGM on PET films leads to improved films in terms of OTR and WVP with minor changes in optical properties.

Effect of supercritical CO2 and olive leaf extract on the structural, thermal and mechanical properties of an impregnated food packaging film

“…Among them, low-and high-density polyethylene (LDPE and HDPE), ethylene-vinyl acetate (EVA), poly(lactic acid) films (PLA), poly(ethylene terephthalate) (PET) or polypropylene (PP) are commonly used as substrates in active packaging material. In particular, PET has been used in coatings and multilayer formulations for obtaining an oxygen barrier material [8][9][10][11], whereas PP has been used in anti-insect and AM packaging material [12,13].…”

A Review of Nonbiodegradable and Biodegradable Composites for Food Packaging Application

“…Ishtiaque et al assessed the gas permeation on PET film coated with natural polyphenolic-gelatin mixture (PGM) [127]. It was worth to note that the OTR and WVTR of PET-PGM film decreased by 22.56% and 23.08%, respectively, with regard to the PET film (82 cm 3 •m −2 day −1 OTR; 1.30 g•m −2 day −1 WVTR).…”