A method for making expanded paper honeycomb core material m oisture- or waterproof, and the thus obtained honeycomb core material

摘要

The invention relates to a method for making expanded paper honeycomb core material moisture- or waterproof, as well as the honeycomb core material obtained by using this method. According to the invention, the honeycomb core material is provided with a coating after expansion, the coating preferably being applied as a powder of a polymer plastic.