Shouguang Dawn Forest Wood Co., Ltd

Classification of multi-layer plywood

2022-04-07

Multi-layer plywood is one of the commonly used materials for furniture, one of the three major panels of wood-based panels, and can also be used for aircraft, ships, trains, automobiles, buildings and packaging boxes. A group of veneer is usually formed by gluing the wood grain directions of adjacent layers perpendicular to each other. Usually, the surface plate and the inner layer are symmetrically arranged on both sides of the center layer or the core. It is a slab made of glued veneers crisscrossed in the direction of the wood grain, and pressed under the condition of heating or no heating. The number of layers is generally odd, and a few are even. The physical and mechanical properties in the vertical and horizontal directions are slightly different. Commonly used plywood types are three plywood, five plywood and so on. Plywood can improve the utilization rate of wood and is a main way to save wood.
Generally divided into the following categories:
(1) According to the use, it is divided into ordinary plywood and special plywood.
(2) Ordinary plywood is divided into class I plywood, class II plywood, and class III plywood, which are weather-resistant, water-resistant and moisture-resistant plywood respectively.
(3) Ordinary plywood is divided into unsanded board and sanded board according to whether the surface is sanded or not.
(4) According to tree species, it is divided into conifer plywood and pavilion plywood