| 摘要 |
A coating and a method of producing it are disclosed. The coating comprises a polymer layer (9), which is extrusion-coated on a substrate (1), the coating being characterised in that it comprises particles (11) of an essentially hydrophobic aluminium silicate zeolite located between the substrate (1) and the polymer layer (9) extrusion-coated thereon, and that the zeolite has a pore diameter of at least 5.5 ANGSTROM , a molar ratio Si/Al in the crystal lattice of at least 35, and a sorption capacity for water at 25 DEG C and 4.6 torr below 10 % by weight. When producing the coating (13), particles (11) of the above zeolite are introduced between the polymer layer (9) and the substrate (1) before the polymer layer (9) is extrusion-coated on the substrate (1). Preferably, the zeolite particles (11) are sprinkled on the substrate surface just before this is brought into contact with the extruded polymer layer (9). |
