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Why Can't Plywood be Exposed for a Long Time?

Sep. 07, 2021


With the advent of summer, for manufacturers engaged in sheet metal production, such weather is very suitable for producing all kinds of sheet metal. It's just that plywood manufacturers should pay attention to the fact that the finished plywood should not be exposed to the sun for a long time. As a plywood supplier, I will tell you the reason.


Commercial Plywood

Commercial Plywood

Plywood is made by cutting wood pieces into veneers or slicing wood squares into thin wood, and the veneers are fire-retardant treated and then glued with adhesive. At the same time, plywood is one of the commonly used materials for furniture, one of the three major panels of wood-based panels, and is also used as a material for aircraft, ships, trains, automobiles, buildings, and packaging boxes.


In order to change the anisotropic properties of wood and make plywood uniform and stable in shape, it is usually required to observe two basic principles in structure. One is symmetry; the other is that adjacent layers of veneer fibers are perpendicular to each other. Symmetry refers to the veneers on both sides of the center plane of symmetry of the plywood. Regardless of the nature of the wood, the thickness of the veneer, the number of layers, the fiber direction, and the moisture content, they must be symmetrical to each other. In the same plywood, it is required to use veneers of a single tree species and thickness, and veneers of different tree species and thicknesses can also be used, but any two layers of mutually symmetric veneers on both sides of the plane of the center of symmetry have the same tree species and thickness requirements.


Plywood is made by sticking and gluing boards according to the standard. Although it is not as collectible as solid wood, it has a low production cost, is strong and durable, and is suitable for making ordinary furniture and cabinets. For consumers' consideration, generally or provide multiple types of panels, such as ecological panels, special-grade panels, five-ply panels and so on. There are more high-temperature weather in summer, which is conducive to the drying of the boards. It is also the peak period of plywood production. However, the finished boards should not be exposed to the sun for a long time, otherwise it will easily lead to excessive drying and cracking of the boards, and it will also easily cause the glued boards to separate , Thereby affecting the use effect and service life.

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