摘要 |
An abrasion resistant laminate includes a substrate and a durable wear- resistant top layer assembly laminated over a top side of the substrate. The layer assembly includes a wear-resistant upper layer and an underlying decorative layer which together include a first paper sheet impregnated with a first resin. The top layer assembly further includes a core layer underlying the decorative layer. The core layer includes second and third paper sheets impregnated with a second resin. A fourth paper sheet is interposed between the second and third paper sheets in the core layer. T he fourth paper sheet is impregnated with the first resin, whereby the fourth paper sheet functions as a balance sheet to equalize expansion and contraction of the layers under the influence of environmental factors. |