Thin films used in packaging can often contain far more complexity than their simple appearance may suggest. These samples may contain multiple layers, sometimes only a few microns thick, in order to maximize the favorable properties that can be gained from the different chemistries of each layer.
In this study, a blood bag was found to have two different chemistries when analyzing the inside and outside of the bag. Further investigations revealed even more layers, all of which may play important factors in the final properties of the sample. The goal of this case study was to investigate the blood bag by multiple methods in order to identify and measure the various layers present in the sample.
