Degradable barrier composite film evoh

A degradable barrier EVOH composite film, wherein: said layers of material in the composite film were obtained convergence performance by introducing a biodegradable bio-based, the additive is added in masterbatch material layers an amount in the range of 0.3 to 15% control of the total mass of the layer material; hydrophilic active additive in the masterbatch of the hydrophilic group is greater than or equal hydrophilic active material layers of hydrophilic groups; added via addition of type master batch, and the hydrophilic group is a carbon atom layers of material molar ratio in line, i.e. bioactive converge, so that the degradation rate of the material layers of the composite film tends to be consistent. The contribution of the present invention is characterized by layers of material balance, the molar ratio of the hydrophilic group to obtain a carbon atom of the convergence of biological activity and biodegradation rates of convergence and to maintain the appearance of the product, the physical and mechanical properties are not functions change.