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https://patents.google.com/patent/EP0132879A2/en#similarDocuments
0030]
It has also been ascertained that the solid lubricant according to the present invention exhibits the highest degree of sliding characteristics or slipperiness on surfaces of any polymeric material, o similar materials, provided these surfaces, on which the lubricant itself is applied, be porous, or be mechanically rendered porous, being preferably reticulated and/or sintered surfaces; the lubricant can indeed be thus mechanically adsorbed within the pores of the surface and remain firmly fixed thereto, the polymeric surface remain ing unaltered in that the perfluorocarbons are insoluble in the polymeric and similar materials.
adsorbed er ikke det samme som absorbed,
https://www.cotes.com/blog/inside-chemistry-absorption-vs-adsorption