RE: A little off topic question.

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "alfred erpel" <alfred@xxxxxxxxx>


Adam,

It depends what you mean by the highly subjective term "stretchable".
Go to www.mcmaster.com and search on polyurethane and poke around. Durometer
charts with references to known objects are there.  You will find the
softest durometer (available there) is 40A.  There are also sample kits you
can purchase to help you determine what to buy.

	For sure, from medium on up in available durometers are very tough
and 'hard' to stretch (my subjective term).  The hardest durometers feel
like the hardest plastics and can't stretch with human strength at all.

Regards,

Al Erpel

[stuff snipped for brevity below]



> Original poster: mercurus2000 <mercurus2000@xxxxxxx>
>
> I thought polyurethane isn't very stretchable tho? Hmm Adam
> Tesla list wrote:



> >Original poster: "alfred erpel" <alfred@xxxxxxxxx>
> >
> >
> >
> >Adam,
> >
> >     Check out polyurethane.  It has good chemical
> resistance properties.
> >It is available in sheets bars and tubes and varying durometers (
> >www.mcmaster.com ).  It is also available in a two part curative, so
> >you can cast your own shapes.



> > >
> > > Original poster: mercurus2000 <mercurus2000@xxxxxxx>
> > >
> > > Does anyone know of a stretchable rubber that won't be
> destroyed my
> > > mineral or transformer oils? I'm building a small high frequency
> > > high voltage transformer and part of the enclosure needs
> to be made
> > > of a stretchable dielectric material.
> > > Thanks.
> > > Adam