各种板材的区别21（The difference between various plates 21）.docVIP

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各种板材的区别21（The difference between various plates 21）.doc

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各种板材的区别21（The difference between various plates 21）

各种板材的区别21（The difference between various plates 21） The difference between various plates Sheet metal, blockboard, plywood, stability (a) Blockboard; 1, concept Blockboard (commonly known as big board, carpentry board) is a plywood with solid wood core, its vertical (to the core plate to differentiate), bending pressure is poor, but the lateral flexural strength is higher. At present, most of the market are solid, glue, double-sided sanding, five - layer blockboard, size specifications of 1220 mm * 2440mm. 2, characteristics The carpentry board has the advantages of good holding screw force, high strength, strong quality, sound absorption, heat insulation, etc., and the moisture content is not high, and is between 10% and 13%, and the processing is simple and convenient, and the application is most extensive. Blockboard than wood solid stability, but afraid of moisture, construction should be avoided in the kitchen and toilet. Process extension Blockboard and fight hand fight two, hand made is using artificial wooden inlay plywood, wood by the extrusion pressure difference, not according to the machining, only suitable for projects of decoration, such as solid wood flooring cushion wool board etc.. But the mechanical plate is squeezed more pressure, the gap is very small, the stitching is smooth, the bearing capacity is even, and it is difficult to deform for a long time. OK. The price of blockboard is between 70 and 140 yuan, and the difference is between 40 and 60 yuan. There are many kinds of core materials in blockboard, such as poplar, birch, pine and Paulownia. Among them, poplar and birch are the best, and the texture is dense. The wood is not soft and hard, and the nail holding capacity is strong and it is not easy to deform. But Paulownias texture is soft, the water absorption is big, is not easy to dry, makes the plank, the long-term use water evaporates, the plank is easy to crack the deformation. The hard wooden ground is hard to be pressed, the splicing