Permanent hydrophilic-anionic or hydrophylic-cationic surface layer and process for its manufacture

摘要

The invention relates to a hydrophilic-anionic or hydrophilic-cationic surface layer and to a process for manufacturing it. The object underlying the invention is to specify a permanent hydrophilic-anionic or hydrophilic-cationic surface layer in which the auxiliary materials used for the hydrophilisation adhere better to the surface and to specify a simplified process in which the thermochemical and mechanical properties of the surface are not impaired. The object is achieved by a surface layer which comprises a complex in which the ratio of the cationic to the anionic groups does not equal 1. Furthermore, the object is achieved by a process in which water-soluble cationic polymers and/or surfactants and water-soluble anionic polymers and/or surfactants are situated in solution and are simultaneously or successively applied to a surface, either the cationic or the anionic substances having to be added in excess.