[NHCOLL-L:3240] Silicon coated mylar query

[Sara Moy]

Apologies for the cross posting.

Does anyone know if silicon coated polyester (Mylar) has a shelf life?  I
have recently encountered some that appears to be degraded.  It has a milky,
streaky appearance and grimy and tacky feeling.   A 1997 Distlist posting
expressed some concern regarding the cross-linking to the Mylar substrate. I
have attempted to contact manufacturers of silicon polyester to obtain more
information on the chemistry and method of manufacture, however with no
avail.  I believe that the polyester can be coated using solvents or by
means of thermal or UV curing.

Does anyone have any information regarding the processes of silicon treated
polyester?  Additionally can any supply a reliable source for purchasing?

Sara Moy
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