I have my own question that I am interested in getting answered regarding the newer films that are being sold for biodegradable packaging.
Most polymer films can be degraded by ultra violet light. Am I right in thinking that for the biodegradable films this is a critical part of the biodegradation mechanism?
If so my next question is what happens during plasma treatment where the plasma is a source of high intensity ultra violet light? Does it start or accelerate the degradation process or does it cause yellowing?
I know that some of the rigid polymers do yellow during plasma treatment but as they are them metallized the yellowing is hidden and the adhesion requirement is not to onerous to achieve.
The same might be true for metallized film depending which way the films is used. However much of this film is aimed at the transparent barrier packaging newer markets where the water white clarity is required and so yellowing is an issue.
I look forward to your replies.
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