Bilayer films composed of wheat gluten and functionalized polyethylene: Permeability and other physical properties

Bilayer films composed of a wheat gluten layer and a functionalized polyole fin film were performed by hot press process with the aim to improve the mo isture barrier property of hydrophilic gluten films. An ethylene/acrylic es ter/maleic anhydride terpolymer (Lotader 3410) and an ethylene/glycidyl met hacrylate copolymer (Lotader GMA) were used. The use of both Lotader produc ts had no incidence on him opacity, and was effective to reduce dispersion in water and water vapor permeability. In the presence of the terpolymer, t he mechanical properties were enhanced and the wide range selectivity of gl uten films was preserved.