DEGRADABLE FOAMED AND CO-EXTRUDED PET BARRIER FILM

摘要

A degradable foamed and co-extruded PET barrier film, characterized in that the materials of various layers in the composite film all obtain approximately-consistent biodegradability by introducing biomass, and the amount of the additive master batch in the materials of each layer is controlled within a range of 0.3-15% of the total mass of the materials of the corresponding layer; the hydrophilic activity of the hydrophilic groups in the additive master batch should be greater than or equal to that of the hydrophilic groups in the materials of each layer; by adding the additive master batch, the mole ratios of the hydrophilic groups to carbon atoms of the materials of each layer tend to be consistent, namely, the bioactivities tend to be consistent, so that the degradation rates of the materials of various layers in the composite film tend to be consistent. In addition, the appearance, the functions and the physical and mechanical properties of a product remain unchanged.