[libria]

Assuming these terms are all correctly spelled, this has to be the shortest sentence I've understood the least of on HN.

Guess I've got some googling to do.

[NavinF]

UHMW = ultra high molecular weight. Each molecule is literally heavy because they have a lot of atoms.

PE = polyethylene. The most popular plastic on this planet.

HDPE = high-density polyethylene. One of the most common plastics. Milk jugs, glue bottles, etc.

Stick some UHMW tape on anything that needs to slide easier. Its surface is quite slippery

[jessebro]

HDPE is also what Nalgenes and the like are made of (or used to be anyway), and is very popular for storing chemicals as well. It is very nearly completely inert.

[kragen]

they are! sorry to be telegraphic