Method for Preparing Transparent Sheet Materials
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United States of America Patent
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Dec 14, 2015
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Dec 19, 2014
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Abstract
A method for preparing a transparent sheet material comprising an organic, polymeric substrate and inorganic layers on each side of the substrate, the method comprising the steps of: a) providing an apparatus for generating a glow discharge plasma, said apparatus comprising at least two opposing electrodes, a power supply for the electrodes and a treatment space between the electrodes; b) providing the treatment space with a gas mixture at about atmospheric pressure, the gas mixture comprising a reactive gas and a precursor; and c) moving a transparent substrate through the treatment space comprising the gas mixture at an average speed of at least 1 m/min while applying an electrical potential across the electrodes, thereby generating a glow discharge plasma in the treatment space and depositing an inorganic layer on one or both sides of the substrate; wherein the electrodes apply a discharge energy to the substrate of less than 25 J/cm2.
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