How about a carpenter's packing case?
1 plywood Plywood: plywood is made of wood, cut into sheets or wood squares, cut into thin wood, and then glued to three or more layers of three. Usually, the odd layer single plate is used, and the fiber direction of the adjacent layer single plate is mutually arranged vertically and glued. Therefore, there are three, five, seven, and so on odd layer plywood.Structurally, the outermost veneer of plywood is called a watch board, and the front panel is called a panel. It is made of the finest quality veneersMaterial. The reverse plate is called the backing plate, and the quality is the second sheet. The inner sheet is called the core plate or the middle plate, and it is made of the single sheet with the worst quality.2. What are the properties of plywood and what are they suitable for making?Each layer of the plywood is glued with glue, so its environmental protection is very poor. It is not recommended to be used in home decoration, if you want to say itWhat is suitable for making, then it is most suitable for making is the packing box.In addition, plywood is also suitable for concrete construction or scaffolding in construction sites.
The vertical direction of the core plate (the difference between the core and the material) is poor, but the lateral flexural strength is higher. Both nail grip and water repellency are availableBetter than MDF and chipboard. The surface is generally rough and needs finishing (paint or decorative panels etc.). Simply speaking,A large piece of carpentry that must be nailed at home usually requires a large core board.But the large board itself uses a lot of glue, and a lot of glue or paint will be used in the finish, and the core boardPollutants are in open volatile state, so, home improvement must strictly control the use of large core board.
First introduce the core board1, big core board is also called blockboard, is in the middle of the two pieces of wood veneer splicing board and clamp. The wood and wood veneers in the middle are made of adhesive glue, so the formaldehyde release of many large core boards is beyond standard.2, the purchase of large core board must buy regular manufacturers of E1 products.Choose to observe its appearance, see big core board surface is smooth, without warping, deformation, there is no bubble, depression, the best can be opened the article core observation internal is uniform and tidy, the smaller the gap, and should not have decayed, fracture, wormhole, knot etc..Buy Daxinban, businesses tend to have many piles of stacked Daixinban a picture, can choose new Duitou (ashLess, wood color new) put a few of its big core board up, fan about, smell the taste of the drift out, without stimulation, environmental protection is relatively good.
