Flame-sprayed thermoplastic substrate is coated with an adhesive layer which bonds particles of an adsorbent like carbon to the substrate

摘要

The thermoplastic polymeric surface to be adhesively bonded is flame-sprayed with a material having a surface free energy which is greater than the surface free energy of the thermoplastic polymeric surface. In a specific application of the invention, a particulate coating is formed on the thermoplastic polymeric surface by flame spraying the surface with a material selected from the group consisting of carbon, ceramics, metal, metal oxides, metal alloys, and mixtures thereof. An adhesive coating is applied to the flame-sprayed surface, following which particulate material is applied to the adhesive-coated substrate to form the particulate coating.