Had to recall some 25 years in plastics to maybe help with this thread. Polyester is Hydrophobic. Which means It does not absorb water and will be quick to dry. Nylon is Hygroscopic which means it will absorb water (I still have some faint scars on my thumb from trying to mold with "Wet" Nylon, moisture does not like 525 degrees!!). Some precision Nylon parts are actually packaged with a few drops of water to let them "Normalize". Nylon also can become stronger when normalized.

I did do a search on this subject an found a report from a professor of science that stated exactly the opposite about Nylon?? Lord save us from those that teach!! I present my thumb as proof!