nylon in petrol

[Joe Chiasson]

> I'll ask my mother later about chemical resistance of various nylons, but
> as for the hygroscopic part of its nature, the most noticable effects are
> that if damp it moulds funny (steam in the plasticiser), and when 'dry'
> becomes significantly more brittle.
> 

Cool, I did notice significant expansion (for the tolerances I was trying
to hold) in the 0% glass filled nylon-6,6, perhaps it was a bum batch of
nylon??? Wrote it off as the hygroscopic nature (problem when you just read
a few pages of a book), perhaps its was caused by something else, will have
to investigate more thouroughly.  Perhaps just heat deformation (under hood
temps). Have not seen any dimensional changes in the 15% filled yet (more
brittle and stronger than the 0%).

j.