Oh, you are right. Had the wrong term in mind. 
But I wonder why I nethertheless could print on it without issues (and it looked really good).
After creating my post I decided to try the cool plate again. Now it seems that there are more gaps, blobs and stringings on my print with the cool plate.
I can print, but it looks awful. This happened because the filament sticks to the nozzle (clogging)
I dont have my PLA in the color I need for my build project. That’s why I currently have to stick to PETG.
How do I prevent the filament to stick to the nozzle after extrusion?
edit: I use default Generic PETG settings btw.