Plywood, also called plywood, is a kind of technical wood. It is made of relatively thin wood veneer. The grain directions of all adjacent veneers are perpendicular to each other to ensure that the entire slab has better strength. Usually plywood is an odd number of layers, commonly used are plywood, plywood and the like.
The symmetrical structure can reduce the variation of the plate, and the direction of the grain of the two plates is the same. Between the veneers coated with high-strength plastic, pressed at a certain temperature and pressure from a certain pressure. Usually used phenolic glue, urea-formaldehyde rubber and melamine glue.
One common reason for using plywood instead of wood is because plywood has strong resistance to cracking, shrinkage, distortion, and high strength properties. And plywood has a larger size range than solid wood, so there are many applications in construction.
Made of plywood, it has the following characteristics:
1. Plywood has all the advantages of natural wood, such as light weight, high strength, beautiful texture, insulation, etc., but also can make up for some of the natural wood produced by the defects such as festivals, small format, deformation, vertical and horizontal mechanical differences and so on.
2. The plywood production can reasonably utilize the logs. Because it does not have sawdust, every 2.2-2.5 cubic meters of logs can produce 1 cubic meter of plywood, which can be used instead of about 5 cubic meters of logs sawing the plate, and for every 1 cubic meter of plywood products produced, it can also produce residues of 1.2-1.5 cubic meters. m, which is a good raw material for producing medium density fiberboard and particle board.
3. Because the plywood has the advantages of small deformation, large size, convenient construction, no warping, good tensile stripe mechanical properties, etc. Therefore, this product is mainly used in furniture, interior decoration, residential construction of various plates. Followed by shipbuilding, trunk manufacturing, various military, light industrial products and packaging and other industrial sectors.