Re: Cap Material?

To: tesla-at-pupman-dot-com
Subject: Re: Cap Material?
From: Mark Finnis <mefinnis-at-medicine.adelaide.edu.au> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
Date: Fri, 13 Nov 1998 17:12:20 -0700
Approved: terryf-at-verinet-dot-com

At 06:21 AM 13/11/98 -0700, you wrote:
>Original Poster: RWB355-at-aol-dot-com 
>
>Hi all,
>
>I have been following the capacitor posts with great interest. I am as always
>on the lookout for new ideas. The other day (it was my mom´s birthday) I
>unwrapped some flowers out of their plastic wrap. I was wondering if anyone
>knows what this plastic warp is made of. It is completely clear, hard to the
>touch (as opposed to PE which feels soft and waxy), if you crease it
sharply a
>white line appears along the crease. It surface is pretty hard and not so
>easily scratched. If you pull it, it hardly streches (and is very hard to do,
>unlike PE). It also "crackles" when crumpled (also unlike PE). The
material is
>very hard to ignite. It shrivels up and melts into a pool before you can get
>it to ignite (which takes very long....unlike PE, too). Once it burns, it
>burns with a pale blue flame, with hardly any smoke or carbon particles. The
>plastic itself has no smell at all. When it burns there is a distinct
smell of
>burning plastic (I can´t describe it better, but it doesn´t smell like
>paraffin---> like burning PE). The material is not attacked by any kind of
>solvent or glue and nothing sticks to it (Which leads me to believe it is not
>PVC based). The material is approx. 3 mils thick. 
>I haven´t gotten around to hv destruction testing yet.
>
>Anyone got any ideas what this is? 

Recycled polyester ........ No good for RF caps.



Mark

Tesla Page <http://www.cobweb-dot-com.au/~dkfinnis>