Six panels with a size of 500(L) x 500(W) x 16(T mm were prepared using each of 12 different commercial UF resin(The resin used in this study was supplied by Degussa AG), and 12 panels were prepared using a commercial MUPF resin. The conditions employed are summarized in table 1. The particleboards were manufactured at a target density of 700t 10 kg/m with 11 UF resin adhesive of the face and with 7% and 90 UF resin adhesive of the core. The content of MUPF resin adhesive was 13%.