Re: LDPE oil tolerance?

Subject:      Re: LDPE oil tolerance?
       Date:  Mon, 02 Jun 1997 23:39:12 -0700
       From:  Bert Hickman <bert.hickman-at-aquila-dot-com>
Organization: Stoneridge Engineering
         To:  Tesla List <tesla-at-pupman-dot-com>
 References:  1

Tesla List wrote:
> Subject:      Re: LDPE oil tolerance?
>       Date:   Sat, 31 May 1997 16:12:52 -0400
>       From:   Steve Falco <sfalco-at-worldnet.att-dot-net>
>         To:   Tesla List <tesla-at-pupman-dot-com>
> References:   1
> >
> > Hmm... Where'd you get the oil?? The Shell Diala-AX that I use CAME in a
> > 5 gallon LDPE pail from my oil vendor!!
> The oil I use is a petroleum product called Tulco LubSnap (the one that
> has been recommended on this list).  I assume that a silicone oil would
> be kinder to the plastic.  Is the Shell oil silicone or petroleum?
>         Steve


Hmm.. Tulco LubSnap is plain old "mineral oil". Unfortunately, mineral
oils can be either "paraffinic" or "naphthenic", depending upon the
source of the crude oil itself. Shell Diala-AX is made from paraffinic
oil, which apparently has somewhat different solvent characteristics.
Although it also contains some anti-oxidants, it is NOT a synthetic or
silicone-based oil. LDPE may swell somewhat in certain blends, but
should not otherwise be markedly degraded. The uptake of mineral oil
should not significantly degrade it's electrical performance in either
capacitor or transformer applications. Silicone oil would also be a very
good choice.

-- Bert --