Re: LDPE and HDPE

To: "'Tesla List'" <tesla-at-poodle.pupman-dot-com>
Subject: Re: LDPE and HDPE
From: Tesla List <tesla-at-stic-dot-net>
Date: Thu, 17 Jul 1997 10:12:24 -0500
Approved: tesla-at-stic-dot-net

From: 	richard hull[SMTP:rhull-at-richmond.infi-dot-net]
Sent: 	Wednesday, July 16, 1997 7:53 PM
To: 	Tesla List
Subject: 	Re: LDPE and HDPE

At 07:19 AM 7/16/97 -0500, you wrote:
>
>From: 	Jason Judd[SMTP:jason.judd-at-anu.edu.au]
>Sent: 	Wednesday, July 16, 1997 1:25 AM
>To: 	Tesla List
>Subject: 	LDPE and HDPE
>
>Hi folks,
>
>recently I decided to have a go at making a new capacitor. I choose to do a
>rolled cap . When looking for the polyehylene sheeting I could only find
>high density and ulta high density sheets. Since then I have heard
>reference to low density or LDPE. Can someone explain to me what this means
>in terms of dielecric strength and K value.
>
>
>Thanks
>
>Jason
>
>
>
>Jason,

No real diff so far as caps are concerned.  The high density stuff has an
edge in heat handling and a slight edge in voltage.  Don't pay more for the
higher density grades.  LDPE is just fine for all uses in Tesla caps.
Strength on LDPE is rated real high 3000-5000v/mil in .5mil thicknesses
(DC).  In thick slabs >50 mil it drops drastically to 200v/mil (AC shock
excited).  K is around 2.3-2.5

Richard Hull, TCBOR