RE: Strange Polythene

To: tesla-at-pupman-dot-com
Subject: RE: Strange Polythene
From: "Dale, Martin" <martin.dale-at-ntu.ac.uk> (by way of Terry Fritz <twf-at-verinet-dot-com>)
Date: Mon, 15 Feb 1999 12:00:00 -0700
Approved: twf-at-verinet-dot-com

Hello Alex,
               The strange poly you describe sounds like damproofing
membrane to me.

It's usually comes under the product name of Visqueen.

I used stacks of that stuff, when I built my garage/Lab.
I did look at it at the time with a view to cap dielectric, but I noticed
that there were tiny flecks of metal embedded in it.

I'm not sure what the blue colour does to it, but the metal certainly
wouldn't help!

Beware, as I dont think DPM is of sufficiently high quality for use in caps.
Vink plastics sell all sorts of different poly sheeting that is fine as
capacitor dielectric.
I used 60 thou Corthene in mine and it's still going strong after 2 years of
abuse.
                             Martin.


> ----------
> From: 	Tesla List[SMTP:tesla-at-pupman-dot-com]
> Sent: 	Sunday, February 14, 1999 3:53PM
> To: 	tesla-at-pupman-dot-com
> Subject: 	Strange Polythene
> 
> Original Poster: Alex Crow <user-at-alexcrow.clara-dot-net> 
> 
> Dear All,
> 
> Well, I finally picked up a huge roll of poly at the builder's yard, but
> I got it home and it has got an opaque blue tint to it! It is the stuff
> used for damp-proofing under floors, and is quite thick (250 microns)
> but will it work or is the tint bad news?? I'm worried!
> 
> Alex Crow
> user-at-alexcrow.clara-dot-net
> 
>