Nylon is very good material to use in this scenario. Nylon is used in a lot in plastic bearing applications already. It is low friction and self-lubricating (in that it needs no lubrication). It also wears at a low rate and is inexpensive, so from a practicality standpoint, it's a major win. Always keep an extra set printed for maintenance!
I think I'm going to go this route on my Anet A8. Tired of these cheap Chinese bearings rattling away!