Investigation of Glass Cloth Overlays on Plywood as Protection Against Marine Borer Activity (Industrial Test Laboratory, Philadelphia Naval Shipyard No. 2001-J)

摘要

The exposure of plywood panels covered with overlays of duck, duck with silica added, Fiberglas cloth, as well as duck with less than normal resin content in the overlay to marine borer activity at Kure Beach, North Carolina for 39 months and at Daytona Beach, Florida for 51 months revealed that no borers were able to penetrate the overlays with the exception of those overlays with reduced resin content. Marine fungi were found to be active in those overlays containing natural fibers. Paint adherence and effectiveness was relatively poor on all panels in the series. Adherence of the duck overlays to the wood, with and without silica added, was better than those with Fiberglas cloth after the first 24 months exposure.