Re: [TCML] Polypropylene?

[ADAM MUNICH <ajm9414@xxxxxxx>]

Cellophane is a material made from cellulose; plant material. In all
respects, (k, dielectric strength, melting temp...) it's different from PP.

The difference between 'gift wrap' and the stuff used in
capacitor dielectrics is simply the purity and quality of the plastic. Gift
wrap can have air bubbles; dielectrics cannot. Gift wrap can
have impurities, dielectrics cannot. Cellophane makes crinkle sounds when
you bend it, PP does not. (Ziploc vs Frito-Lay bag)

Unless you can find a way to metallize or sputter coat cellophane, there's
no way it'd be able to compete with a commercially made capacitor. Even if
you did coat it; I don't believe it'd be self healing.




On Mon, Dec 3, 2012 at 7:18 PM, <jhowson4@xxxxxxxxxxx> wrote:

> Hey guys,
>
> Quick question for yea all,
> Aside from the obvious quality control aspect, w hat is the fundamental
> difference in the polypropylene used as dielectric and the stuff marked as
> "cello" polypropylene found in gift wrapping ?
>
> I can't seem to find a direct answer online.
>
> Right now I am leaning towards the difference being purely marketing,
> polypropylene replaced cellophane for many of these markets, but people
> still know it as cellophane, or cello, hence why I usually see it in quotes
> and associated with the polypropylene .
>
> What do you guys think?
>
>
>
> Cheers,
> John "Jay" Howson IV
>
>
> "Why thank you, I will be happy to take those electrons off your hands."
>
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