Compressed, embossed, and molded nylon fiber composites that provide exceptionally hard substitutes for wood

Exceptionally hard and durable synthetic wood substitutes are disclosed, for uses such as waterproof substitutes for hardwoods. These hardened composites can be made by using heat and pressure to treat synthetic fiber composites made from fiber mats. Pieces are then cut from a large sheet of plywood-like material, and a suitable time-temperature-pressure combination is used to compress the pieces to a higher level of hardness, which can match or surpass hardwoods and approach ceramic levels. This two-step method is economical, and avoids any need to sustain exceptionally high pressures in a press that is large enough to generate entire sheets. In an alternate embodiment, sheets or pieces can be embossed with non-planar surfaces if desired, by passing them through a suitable type of press, such as a rolling cylinder press. These types of waterproof embossed sheets can be used as adhesive backer boards, to provide attractive and decorative panels or planks that can provide wood-grained or other desired patterns for siding use, and for various other purposes. Alternately, the embossing pattern can provide flow channels, to handle drainage, seepage, uwanted moisture, or other problems relating to water or other liquids or gases. For example, these types of embossed flow channels can allow a sheet with this design to be laid, channel side down, on top of freshly-poured concrete that has not yet fully cured and dried, to enable faster resumption of construction activities while the concrete cures fully over a span of weeks.