From: Bill Sloman
Subject: Re: Best insulator?
Date: Sun, 08 Sep 2002 00:12:43 +0200
Organization: Planet Internet
NNTP-Posting-Date: 7 Sep 2002 22:12:43 GMT
X-Mailer: Mozilla 4.5 [en] (Win98; I)
John Woodgate wrote:
> I read in sci.electronics.design that Ian Stirling
> wrote (in uk>) about 'Best insulator?', on Sat, 7 Sep 2002:
> >sally wrote:
> >> Thanks for the info. Are mylar stand-offs, screws, washers etc obtainable,
> >> and how easy is mylar to drill and machine?
> >> Sally
> >I don't think mylar screws are readily available.
> >Nylon, and to some extent PTFE are.
> >What do you want to insulate, and how much?
> >There may be other solutions.
> I think 'Mylar' is the name for polyethylene terephthalate film. The
> same material is available in block form under another name or three,
> which unfortunately I do not remember.
I think it is Perspex - which is an excellent insulator, though it softens at a
lower temperature than Teflon/PTFE.
When I was a postagraduate student one of my acquaintances was building a 700kV
scanning electron microscope, and the high voltage electronics was build on
Perspex structures which were immersed in transformer oil when the machine was
I'm just back from a fornight in Burgundy (and the ambiguity is inteneded) so
this might not be one of my more reliable memories.
Bill Sloman, Nijmegen (but a portion of our cellar is now Chasson-Montrachat).