I had to go to a neighbouring city to pick up my wife from the airport because of a chain of events that landed her in the wrong town.
Since I was there I took the opportunity to stop in at one of her suppliers of plastic products to see what they had in the crop bin. It turned out to be a good move. Very well organized place, there is no doubt what is what, all the crops are clearly separated and labeled.
Well, what a fine day for plastic shopping. I picked up a large box of virgin PTFE scraps, strips and blocks, large blocks of UHMW Poly, about 4 feet of 1.125" black Delrin and the piece de resistance, a 16" x 3" x .5" slab of Rulon LR. All for $50. Including the Rulon.
For those that don't know, Rulon LR and AR are a type of ceramic filled PTFE (Teflon) that has exceptionally good properties for use as unlubricated sliding bearings of all types and in all conditions up to 500 degrees.
It is also exceptionally expensive. For the 1/2 inch thick material I got it sells for $1,100.00 per square foot. The piece I have would normally sell for about $400, never mind the other plastics I scored.
The nice thing about having a good size chunk of an exotic material is that it makes possible designs that I could not have considered otherwise.