| 摘要 |
<p>Foam is produced by agitating a mixture of a soluble lacquer, gas and sub-micron sized filler particles. The foam is deposited on a substrate. The foams bubbles are collapsed into the substrate, to generate a layer of dried lacquer and filler. Preferably, the lacquers solute is polyvinyl alcohol or water based styrene or acrylic. The filler is preferably clay (greatest dimension ¯200nm) comprising or containing sodium montomorillonite, silicon dioxide, talc, bentonite or kaolinite. Preferably, the deposited lacquer is subjected to infrared (IR) light after deposition. The substrate is preferably calendered paper, tracing paper, or a cellulose or metal based material. Multiple layers may be applied to both surfaces, preferably with variation in particle sizes. The apparatus is also claimed. The high barrier coating comprises oriented, interlocking layers.</p> |
