This might have been because the nanoclay (Cloisite Naþ) is more hydrophilic in nature and provides greater attraction to polar molecules like water than nanoclay (Cloisite 30B), which is hydrophobic (Sothornvit et al., 2009). Therefore, nanoclay (Cloisite Naþ) showed a higher film oxygen barrier (nonpolar molecules) than film incorporated with nanoclay (Cloisite 30B).