Why do one put Kapton tape around the nozzle

Vertex 3D Printer Vertex - Issues while printing
1

Hi all,
seeing a couple of pictures from printheads,
I am wondering, why some people tape Kapton around their nozzle and head element.
Is this a kind of protection or easy cleaning?
ultimaker.com/en/modifications- … t-extruder

Thanks
Frank

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[quote=“frank.von.thienen”]Is this a kind of protection or easy cleaning?[/quote]Both and it’s also a heat insulating material : decreases a bit heat dissipation.

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Merci