Plywood is a material widely used in shipbuilding. Whether to build it completely as in the case of RMs for example, but also to serve as a structure (torque) for boats that will then see their hull in another material (this is the case of strip planning for example).
Plywood is an assembly of sheets of wood (known as plies) that are glued together. Each ply is placed at 90° from the previous one in order to ensure good rigidity to the plywood sheet. The more folds there are, the more rigid the wood is. The last outer ply can be made of a different wood for aesthetic reasons. Plywood 9mm
Each fold is glued to the previous and next fold. And that's where the weakness of this reconstituted wood lies. Indeed, for use in a wet environment, as is the case on a boat, it is necessary to use adhesives that support water. This is not the case for standard plywood. We have to move on to higher qualities, nicknamed "marine plywood".
Despite this, for modern plywood constructions, plywood is protected with epoxy resin. The latter penetrates well into the wood and forms a moisture barrier. This is particularly true for fields (slices) that must be well impregnated. Thus, the epoxy resin encapsulates the wood and does not allow moisture to penetrate inside.
Oak Wood In addition, this resin impregnation will be beneficial for wood gluing. Indeed, the adhesion of an epoxy glue on a resin-impregnated wood will be better and the glue will be more resistant. Again, these collages are often located at field level. Hence the importance of impregnating them well.