In conducting product quality testing, manufacturers of composite core birch plywood have paid special attention to the control and inspection of the moisture content of the boards. The reason is as long as it is closely related to its practical value. my country's composite core birch plywood is mainly used as a surface decoration material, not as a structural material. Surface decoration materials require high flatness and good durability during use. The moisture content of the composite core birch plywood is the main factor affecting the flatness of the composite core birch plywood.

When the moisture content of the combined core birch plywood is balanced with the relative humidity of the atmosphere, the combined core birch plywood neither absorbs nor excludes moisture during storage and use, so warping deformation is not likely to occur. The rate is called the equilibrium moisture content. In this way, the moisture content of the composite core birch plywood is basically equal to or similar to the annual equilibrium moisture content of the wood, so warpage is not likely to occur. In addition, the inspection and grasping of the glue and the ability is also the focus of the key inspection of the composite core birch plywood manufacturers, and it is also the basic and necessary content of the physical and mechanical inspection of the ordinary composite core birch plywood in my country.