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Re: HDPE found: check my capacitor, please



Tesla List wrote:
> 
> Original Poster: Marco Denicolai <marco-at-vistacom.fi>
> 
> After calling nearly 30 companies here in Finland, I eventually found and
> bought 2 sheets of black HPDE, 0.8 mm thick, 1 x 2 meters. The company
> ensured me that black color is just pigment, not coal or other conductive
> stuff.
> 
> Declared properties are:
> 
> Dielectric constant:                    2.4
> Dissipation factor (-at- ? Hz):            0.0005
> Dielectric strength (? mm thickness):   80 kV/mm  (i.e. >2036 kV/mil)
> Water absorption:                       <0.01%
> 


And what might that pigment be?  The most common (by far) black pigment
is carbon. However, since they spec 80 kV/mm for the dielectric strength
it is probably ok. You might check the resistivity spec (which won't
show up in the dissipation factor, necessarily).
-- 
Jim Lux                               Jet Propulsion Laboratory
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