Help: Polymer foil which breaks after one bend

nylons, polycarbonates, etc

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Help: Polymer foil which breaks after one bend

Postby lucasjensen on Mon Nov 19, 2007 6:44 pm

Hi forum,

I'm looking for a polymer foil with the following criteria:

1. It shoud be less than 0,1 mm thick
2. It should be cheap to manufacture
3. When the foil is bent let's say 180 degrees making a sharp edge, the foil will crack immediately and thin hole has been made. So when the foil experiences bends without a 180 (or 120 degrees, whatever) degree sharp edge, nothing will happen and it will stay ductile.

Does such a polymer exist?

Regards, Lucas Jensen
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Re: Help: Polymer foil which breaks after one bend

Postby Dr. Dick on Tue Nov 20, 2007 7:33 am

Think "Turkish Taffy" It shatters when struck but flows under low stress.

At or over what temperature range do you want this to happen?
Dr. Dick

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Re: Help: Polymer foil which breaks after one bend

Postby lucasjensen on Tue Nov 20, 2007 3:22 pm

Dr. Dick wrote:At or over what temperature range do you want this to happen?


At room temperature!

You are right about impact: I could also accept a polymer which breaks when it experiences a hard impact but stays soft when bent slowly.

Lucas Jensen
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