The large core board is made up of two sheets of veneers bonded together in the middle. The price of the large core board is cheaper than that of the thin core board, and the vertical direction (differentiated by the core material direction) is inferior in bending strength, but the lateral bending strength is high. In the middle of the blockboard is a core made of natural wood strips. The thin veneers are glued on both sides. As the name suggests, the core board is one of the most important materials in the decoration. It can be used for furniture and wooden doors and door covers, heating covers, curtain boxes, etc. Its waterproof and moisture-proof performance is superior to particleboard and MDF. When selecting the wood inside, it should not be too broken, and the gap between the woods should be about 3mm. Due to the unsightly appearance of the wood grain on the surface, it is rarely painted directly, and it is usually attached to the plywood. The woodwork such as furniture made of large core board has to pass through two steps of using adhesive board and painting, and the cost is higher. The large core board is divided into 3, 5, and 9 PCT plates according to the thickness. You can choose according to the pressure and strength to be accepted. The thicker the price, the higher the price. The large core plate has good clamping force, high strength, good quality, sound absorption, heat insulation, etc., and the water content is not high, between 10% and 13%, the processing is simple and the most widely used. The large core board is more stable than the solid wood board, but it is afraid of moisture. It should be avoided in the kitchen during construction. The processing technology of the large core board is divided into two types: Machine fight and hand fight. Hand-made is to manually insert the wooden strip into the splint. The wooden strip is subjected to less pressing force, uneven splicing, large gap, poor nail holding force, and cannot be sawed and processed. It is only suitable for sub-projects of partial decoration. Such as the solid wood floor cushion board and so on. The plate of the machine is subjected to a large pressing force, the gap is extremely small, the splicing is flat, the bearing capacity is uniform, long-term use, compact structure and not easy to deform. Different materials and different quality. The large core board is divided into “excellent productsâ€, “first-class products†and “qualified products†according to the quality of the materials and the texture of the surface materials. There are also companies that mark the grades of grades A, double A and triple A, but this is only corporate behavior, which is inconsistent with national standards, which is currently not allowed on the market. There are many kinds of wood core boards, such as poplar, birch, pine, and paulownia. Among them, poplar and birch are the best, the texture is dense, the wood is not soft and hard, the nail holding power is strong, and it is not easy to be deformed, and the paulownia The texture is very light, soft, absorbs large water, has poor nail holding power, and is not easy to dry. During the use of the produced sheet, when the water evaporates, the sheet is easy to dry and deform. The hard wood is hard, not easy to press, the splicing structure is not good, the nail holding power is poor, and the deformation coefficient is large. The use of blockboard furniture, doors and windows and sets, partitions, false walls, heating covers, curtain boxes, etc. Allen Screw,Hex Nut Bolt,Stainless Steel Hex Bolts,Hexagon Socket Head Bolt NINGBO YWC IMP. & EXP. CO.,LTD , https://www.nbywc-fastener.com