Sammensat pakning

摘要

A layer of a biodegradable, compostable co-polyester is extrusion coated onto the surface of a bio-degradable compostable cellulose film to overcome the limitations of cellulose film as a packaging film for fresh produce and still retain the biodegradability, compostability and stiffness of the overall structure. Additionally, good bond strength between the cellulose film and the extruded co-polyester polymer is achieved by applying a thin coating of co-polyester to the surface of the cellulose film by means of a solvent or water based coating process. A biodegradable, compostable co-polyester polymer is extrusion coated onto an additional barrier layer to provide a significant barrier enhancement in high humidity environments beyond levels that would be reasonably predicted.