Abstract:
A plasma is produced in a treatment space (58) by diffusing a plasma gas at atmospheric pressure and subjecting it to an electric field created by two metallic electrodes (54,56) separated by a dielectric material (64), a precursor material is mixed with the plasma, and a substrate film or web (14) is coated by vapor deposition of the vaporized substance at atmospheric pressure in the plasma field. The deposited precursor is cured by electron-beam , infrared-light, visible-light, or ultraviolet-light radiation, as most appropriate for the particular material being deposited. Plasma pre-treatment and post-treatment steps are used to enhance the properties of the resulting coated products. Similar results are obtained by atomizing and spraying the liquid precursor in the plasma field.
Abstract:
A plasma is produced in a treatment space (58) by diffusing a plasma gas at atmospheric pressure and subjecting it to an electric field created by two metallic electrodes (54, 56) separated by a dielectric material, a vapor precursor is mixed (52) with the plasma, and a substrate material (14) is coated by vapor deposition of the vaporized substance at atmospheric pressure in the plasma field. The use of vaporized silicon-based materials, fluorine-based materials, chlorine-based materials, and organo-metallic complex materials enables the manufacture of coated substrates with improved properties with regard to moisture-barrier, oxygen-barrier, hardness, scratch- and abrasion-resistance, chemical-resistance, low-friction, hydrophobic and/or oleophobic, hydrophilic, biocide and/or antibacterial, and electrostatic-dissipative/conductive characteristics.