Somebody at my hackerspace recommends trying either this or ABS.
"Polypropylene (PP) is one of the easiest thermoplastics to weld"
"Another fairly easy thermoplastic to weld is polyethylene (PE)."
"can be extremely temperamental"
- IAPD Magazine — tips
- Bak-Ag.com — welding guide, contains a table of recommended temperatures for various plastics
- Wegener Welding — guidelines, contains many useful details, including a table of temperatures