The basic principle of plywood
First, symmetry; Second, adjacent layers of single-board fiber perpendicular to each other
but the symmetrical center plane in any two layers of symmetrical veneer on both sides and the same thickness. The panel does not allow the same species.
are symmetrical. In the same plywood, you can use a single tree and veneer thickness, you can also use different tree species and thickness of the veneer
The principle of symmetry is to require plywood symmetry on both sides of the plate, regardless of the nature of the wood, the thickness of the plywood, the layer, the fiber direction, the water content, etc
In order to improve the characteristics of natural wood anisotropy, so that the characteristics of plywood consistent, stable shape, the general plywood in the structure must meet two basic principles
