Volume Resistivity of Polyurethane
Volume Resistivity of Polyurethane
(OP)
Is there a materials standard out there somewhere that gives a volume resistivity value for polyurethane? I know there are many different kinds of polyurethane, but is there a reference somewhere for just polyurethane without getting into the various trade names associatted with this polymer? Any help is greatly appreciated.





RE: Volume Resistivity of Polyurethane
Different grades and even different colours of the same grade can have different values, so any general data with no mention of grade is at best unreliable, probably to the point of being useless or even dangerous.
If a wrong value is used in calculations to test a design, it could result in danger of electrocution or fire, so I suspect no responsible source would publish an unreliable figure, and therefore any source that did publish a general figure, could be considered unreliable.
Regards
pat pprimmer@acay.com.au
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RE: Volume Resistivity of Polyurethane
LNP specify a value of 10^13 Ohm.cm for the two grades they supply and the base polymer they use - viz. 20% GF, and 15% PTFE + Si oil and the unfilled.
As Pat has noted - don't bet your house on it - check specifics!!!!
As an aside, a quick browse suggests PU being on the low(ish) end of VR. e.g. Polystyrene 10^15, ABS 10^15, PC 10^16, POM 10^16, PEEK 10^16, PP 10^16, etc., etc.
Rgds
Harry
RE: Volume Resistivity of Polyurethane
RE: Volume Resistivity of Polyurethane
i guess you've covered the rear with a copy of the yellow pages......
You could always add the caveat that end users should verify products in use...
rgds
harry
RE: Volume Resistivity of Polyurethane
shows hard-case polyurethane volume resistivity on the order of 10^12 ohm-cm
TTFN