Which material would be best?

[howddi]

I have designed and will produce a part which is specific to the display industry for watches. I need a material for what we call a watchcuff. You see them in all retail stores where watches are sold. The watches are placed on the cuff to be displayed standing vertically in the showcases. The material must have stiffness or spring to it to allow watch size variation in the bands, be clear or at least frosty translucent.
We tried ABS, not so much for its spring, though it has some, but because it was flexible enough to allow the cuff to be opened up to fit the large men's watch sizes or squeezed to fit the small ladies size watches. ABS was not so good as it does give off a slight smell which becomes noticeable in a closed, warm showcase. Also, not clear.
I have produce many of these cuffs using clear polycarbonate as the material. Polycarbonate has a few problems as well. Though it is tough and flexible it seems to get briitle over time. It also discolored or was effected by the warm temperatures in the showcase or the bright halogen lighting. Eventually the polycarbonate cuff snaps and breaks.
I have thought about acetal, polycarbonate/abs alloy, cellulose acetate, Pet, PetG as canidates, but would like to know which has the charactoristics I am looking for without doing a lot of testing.

 

[insideman]

I am a bit puzzled by the polycarbonate failure. Possibly it is illuminated by fluorescent lights? If the PC is not UV inhibited, it may degrade when so illuminated.

I suggest that you contact GE. I believe they have UV stabilized sheet about .04 thick. Intended for glazing. Lasts for years!