| 摘要 |
<p>An improved economically produced clean room ceiling tile formed as a composite comprising a base board (13) and a finish coated paper facer (19) laminated to the base board. The base board (13) is preferably made with excess thickness and is machined to a desired caliper. The machined board is sealed with a clay coating (15) and thereafter coated with a water-based adhesive (17). The paper facer (19) is laminated to the board with the water-based adhesive and is finish coated with a water-based wet scrubbable coating (23). The paper facer (19) is easy to laminate, exhibits excellent coverage of surface defects in the base board (13) surface, is fully compatible with the water-based finish coating, and contributes to the sag resistance of the tile.</p> |
