Bonding of laminated plastics skis - using urea-, melamine-, phenol- or pref. resorcinol-formaldehyde adhesives

摘要

Prodn. of skis comprising layers or plies of synthetic resins, plastics or other dense materials and layers of reinforcement. The surfaces to be bonded with an adhesive are treated with a liq. thermosetting condensate of HCHO with urea, melamine, phenol, resorcinol or a combination of these in admixt. with a hardener. The coated surfaces are dried until the solvent has evaporated and they no longer feel tacky. The layers are then stacked and pressed at a temp. high enough to flow and cure the resin. Used for mfr. of skis usually comprising upper layers of ABS, glass fibre reinforcement, a foamed plastic or wood core and a sole or base usually of polyethylene. Using this method. The prodn. time is decreased and avoids the problems of epoxy adhesive allergy.