I visited the website where you got the picture from.
There they call it "corrugated board" packing material.
Is that what you mean or which other name are you looking for?
I even found an organization called "European Federation of Corrugated Board Manufacturers" at http://www.fefco.org/
They also use the term "corrugated board". Can't think of another way to call it spontaneously.
Travel is fatal to prejudice and narrow-mindedness.