after leaving the conveyor belt 34 the system for forming the laminate of fig3 into the desired shape is described in the aforementioned romesberg et al patent and need not be repeated here the thermosetting adhesive resin mixture 39 applied at 40 is about 36 50 polyether polyol by weight preferably in the range of about 40 60 by volume about 50 64 aromatic isocyanate by volume with an appropriate catalyst if desired of about 0 0 0 2 by volume preferably the volume of isocyanate is in the range from about 52 63 the resin mixture 39 should have a ratio of isocyanate equivalents to polyol equivalents index above about 1 1 65 preferred polyols comprise a hydroxyl terminated poly oxyalkylene polyol most preferably a hydroxyl terminated poly oxyethylene polyol of appropriate molecular weight and functionality such as obtainable from dow chemical as voranol 446 a small amount of up to about 6 voranol 800 trademark of dow chemical co may be used effectively such polyether polyols may be used in the adhesive mixture 39 to achieve the desired hardness and flexibility in the cured resin the preferred isocyanate is a polymethylenepoly pheylene ester of isocyanate acid such as obtainable from mobay corporation under the trade designation mondur mr or dow chemical designation dow pappi 2027 whose composition consists essentially of about 45 55 of diphenylmethane diisocyanate mdi about 45 55 of higher oligomers of mdi and a trace of phenyl isocyanate suitable catalysts are available from air products and chemicals inc under the trade designation.