In order to improve the anisotropic properties of natural wood as much as possible, and make the plywood have uniform characteristics and stable shape, generally plywood must comply with two basic principles in structure: one is symmetry; the other is that the fibers of adjacent layers of veneer are perpendicular to each other. The principle of symmetry requires that the veneers on both sides of the center plane of symmetry of the plywood should be symmetrical to each other regardless of the nature of the wood, the thickness of the veneer, the number of layers, the fiber direction, and the moisture content. In the same plywood, you can use veneers of a single species and thickness, or veneers of different species and thicknesses; however, any two layers of symmetrical veneers on both sides of the center plane of symmetry must have the same species and thickness. The face and back panel may not be the same tree species. To make the structure of plywood meet the above two basic principles at the same time, its number of layers should be odd. Therefore, plywood is usually made of three layers, five layers, seven layers and other odd layers. The names of each layer of plywood are: the surface veneer is called the surface board, the inner veneer is called the core board; the front surface board is called the front board, and the back surface board is called the back board; in the core board, the fiber direction is parallel to the surface board It is called long core board or middle board. When forming the cavity table slab, the face plate and the back plate must face outwards tightly.

World’s Leading Trade Fair for Architecture, Materials, Systems | April 17–22, 2023 | Trade Fair Center Messe München BAU for exhibitors The world’s leading trade fair BAU sets standards. It is the industry’s most important gathering. Everyone involved in planning, building and designing buildings is represented here. BAU is where exhibitors present their products and innovations in an international dimension: for commercial and residential construction and interior work for both new-build and renovation and modernization. XHWOOD Group was established in 2012, Our Company Traditional main products exporting over 10 years: A series of different plywoods, MDF, Chipboards, Various Melamine Boards . Our Company new area for recently two years: The Decoration WPC Wall Penal ,3D PVC UV Marble Sheet,PVC Foam Board, SPC LVT Floor and WPC Decking etc ,other decoration materials. The company passed the US CARB certification, FSC forest management system certification,European CE Mark, and have our own quality control systems and detection center, strict control of product quality. Companies based on environmental protection in order to safeguard the interests of the health of consumers as its mission, the first by the China Environmental product certification mark, green products have reached the national standard and superior. Products sold to Philippines，Thailand, India, Indonesia, the United States, Russia, Middle East Several Countries ,Latin America Countries，England and Germany，lots of African Countries more than 120 countries and regions, the export sales of about 400 million yuan. We are sincerely looking for national suppliers，We can give you the best quality assurance, and the most competitive price，I hope to have a long-term cooperation with you,and if you have any interest,please contact me at any time !

Plywood is a kind of board that is often used to make furniture, cabinets, etc. Although it is not as beautiful as solid wood and has collection value, it is really popular because of its lower cost. Plywood manufacturers produce panels in large quantities every day and store these panels in the open air. Regardless of whether it is a board or other products, as long as it is made of wood, it is easy to be affected by moisture, cracks, etc., which affect the appearance and use. Although plywood manufacturers know this truth well, because of the limited storage space and the need to dry new boards to remove water, they still have to be stored in the open air for a period of time. During this period of time, manufacturers should pay close attention to changes in weather, cover the plates with plastic sheets in time on cloudy and rainy days, or transport the plates indoors to prevent the plates from being damp and degumming. Although the summer temperature is high, it can speed up the evaporation of water from the board, but the plywood exposed to the sun for a long time is also prone to degumming. Therefore, the plywood manufacturers should pay attention to the influence of temperature when storing the boards in the open air. When the sun is too strong, try to reduce the time of plywood storage in the open environment.