thanks for that info about the purposes.
i still do not like this flexible stuff.
not for soldering components on it. as cable it is ok.
but thats only my opinion.
i guess you already read this:
http://www.pcbspecialist.com/EBasematerial.htmsearch for flexible.
may need writing some mails but may result in some samples?
especially this note may be interesting: (Rolled ultra thin FR4 for
flexible applications).
it at matsushita...
i would try this if it is flexible enough/can be used as cable/connector.
because it should be the same to use as thick fr4, i do not trust this
plastic foil things very much ;-).
keep us informed please if you get something.
there are loads of "flexible material" providers in the above list url.
if you check all homepages and write a mail to every interesting one you
get some samples for sure.
check all and choose the best. i think the materials may need photoresist
coating done by you.
this is no problem i think. but putting the copper on i would not think to
be possible so easy.
hope you find some material...
regards
stefan