High pressure laminate for access floor panels

A method for inhibiting delamination of high pressure laminate from the support structure in access flooring panels comprising the steps of providing a high pressure laminate having a rigid, impervious melamine plastic layer laminated under high pressure to a resin paper element comprised of multiple sheets of paper impregnated with resin;

• cutting at least one groove in the resin impregnated paper layer;
• and adhesively securing the surface of the resin paper element opposite said melamine plastic layer to a receiving surface of a support structure for the access flooring panel to form a bond line between said receiving surface and said resin paper element surface;
• wherein said cutting provides said at least one groove with sufficient depth to cut sufficient grain lines of said resin impregnated paper layer so that, when the resin impregnated paper layer expands or contracts due to moisture absorption or evaporation thereby causing the rigid melamine layer to move outwardly or inwardly with respect to the support structure and creating a stress on said bond line, said at least one groove alleviates said stress on said bond line and thereby inhibits delamination of said high pressure laminate from said support structure.