The good people from Madesolid were happy send us some samples of PET+ for testing.
PET+ filaments are supposedly "Easy like PLA, Strong like ABS. More flex than both" and we wanted to test it out for ourselves. PET+ filaments are available in 9 different colours including opaque and transparent varieties. Find out more about PET+ at Madesolid.com.
Overall, I must say that we are very happy with the PET+ filaments - they are stronger, more flexible and more heat resistant than PLA or ABS. We had problems initially with the extrusion but that was solved by raising the temperatures.
In general, Proftweak allows the user control of many additional settings on the Makerbot.
We used the settings from Madesolid for the Makerbot Replicator 2. Find the right settings for your printer on Madesolid.
PET+ does not require any modifications to the extruder mechanism on a Makerbot Replicator 2. If you can print with PLA, you will definitely be able to print with PET+.
There are a few things to keep in mind. With PET+ filaments, it is imperative that the temperature of the extruder go up to about 250-260˚C. This ensures that there is smooth extrusion while at the same time ensuring that the layers are adhered together.
You would also need to slow down the printing speeds.
Sticks like PLA
With PET+, there is no need to print with rafts as the material adhered rather strongly to Blue Painters Tape. Printing with rafts also creates the additional work of having to break off the rafts after printing is completed. With PET+, breaking off the rafts is not really the correct term to use. Due to the strong layer adhesion, you would have to use tools to pry the raft and the model from each other.
PET+ filaments do not shrink hence there is no warpage, which makes it much easier to work with than ABS.
Strong as ABS
According to it's Data Sheet, PET+ has a Tensile Strength (Yield) of 6640 PSI while that of ABS is approximately 6500 PSI. If anything, PET+ is as strong as ABS and yet much easier to work with.
This video would give you a better idea of how strong PET+ filaments are.
Drools like a little baby
Partly due to the high temperatures at which this material works, there seems to be a lot of drool. But I find that it is solved quite easily by increasing the retraction distance under Proftweak.
Also the drool material can be cut and cleaned off quite easily using scissors, art knives
We're already working with the good people from MadeSolid to bring these wonderful filaments to our shore. Look out for them at the end of the month.