| 摘要 |
A reinforced panel for tables, counters, desks, benches, etc. has a foamed polyurethane core reinforced by feather barbs, with top and bottom layers of solid polyurethane reinforced by chopped fiberglass. The top layer has a color gel coat resin coating and a surface coating containing granite particles. The panel is manufactured by spraying the surface coating, then the color gel coat resin in the mold top, then polyurethane precursors and chopped fiberglass in the mold top and bottom. A slurry of polyurethane precursors, feather barbs and blowing agent is poured into the mold. The mold is closed, and the polyurethane precursors are cured and foamed, vacuum may be applied to fill voids during foaming.
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