Re: Rolled PE design question

In a message dated 3/29/99 3:12:09 AM Mountain Standard Time, tesla-at-pupman-dot-com

>  So my question is, could you replace the extra PE layer
>  on the bottom (could be on top) with an insulater?
>  Thanks in advance, Chris.  
    The "extra" layer of PE is needed.   If you think about it, the
capacitance will double in a rolled cap vs. a flat plate cap of the same area
(with two plates) due to the backsides of the plates acting like a third plate
once rolled.   Would it not make sense to use the PE rather than some other
insulating(dielectric) material?