In the polyester family of products, the printing industry uses a variety of types known for their linear stability under tension, pressure and heat. Here is one source that I googled under "photopolymer plates." There may be some inspired use here because of the imaging capability of these plates. In the past (many years ago) I used to make short run multiple copies onto this type of plastic by using a contact negative or positive master during the exposure process.
http://www.photopolymerplates.com/photopoly.htm And, here is a link to a general use and some environmental concerns. http://www.pneac.org/sheets/flexo/photopolyflexplates.cfm Larry Bohlayer Celestial Products P.O. Box 801 Middleburg, VA 20118 540-338-4040 [EMAIL PROTECTED]
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