CDX plywood

CDX plywood is a construction-grade plywood made of thin wood sheets that are cross-laminated. Its name derives from the grade of its surface and the type of plywood inside. CDX stands for Class C surfaces and Class D and X plywood, where Class D and X plywood is the lowest grade of plywood.
CDX plywood is commonly used in architectural and structural applications such as flooring, wall panels, roofing, partitions and formwork.

plywood supply

plywood 中文：胶合板

plywood panel company

Plywood (Plywood), also known as plywood, wood glue board, is the first used in the decoration industry a kind of plywood. Plywood is made of a variety of logs, wood square rotary cut or planed into the veneer (veneer is the basic unit of its composition), and then glued with a special phenolic resin adhesive for plywood. In order to ensure that the characteristics of plywood are uniform and the shape is stable, plywood manufacturers must comply with three production principles in the process of producing plywood: first, symmetry; Second, the direction of the adjacent layers of veneer fibers is perpendicular to each other, and the third is that the number of layers is usually odd.

Commonly used plywood types are plywood, plywood, the main materials are: beech, camphor, eucalyptus, poplar, eucalyptus, etc., usually the length and width specifications are: 1220×2440mm, the thickness is generally divided into 3 cm board, 5 cm board, 9 cm board, 12 cm board, 15 cm board and 18 cm board (1 cm is 1 mm). The birth of plywood has greatly improved the utilization rate of wood (1m3 plywood can be used instead of 3 to 4m3), which is a main way to save forest resources.

In order to fully and reasonably use forest resources to develop plywood production and make the best use of the material, the newly formulated national standard GB/T 9846-2015 was officially released in 2015, which is based on the use of plywood. Plywood is divided into finishing plywood (for furniture, sewing machine table and various electrical housings and other products that need to be coated with transparent paint on the surface), decoration plywood (used as decoration materials for buildings, furniture, vehicles and ships), general plywood (suitable for packaging, padding and other purposes) and thin wood decorative plywood (used for construction, furniture, vehicles, etc.). High decoration materials for ships, etc.).

Plywood advantages and disadvantages

Advantages:
1, plywood in the production process, is not easy to produce sawdust, can make reasonable and effective use of log resources, improve the utilization rate of natural wood, is an important way to save wood.
2, plywood light weight, good bending performance, convenient transportation and construction, beautiful texture, make up for some of the natural defects of wood, has a good decorative. In some structural parts that need to bear weight, the use of thin core panels will be more strong.
3. The boiled plywood has strong weather resistance, high temperature resistance and durability. It is widely used in aircraft, ships, trains, automobiles, home decoration, construction and containers.

Cons:
1. The surface of plywood has no density board, solid wood is clean and smooth, and is not suitable for cabinet doors, window sashes, etc.
2, not fully dried plywood, there may be unqualified quality, production process and other problems, resulting in serious deformation of the plate in use, external force is difficult to adjust it.

Plywood production process

Veneer finishing → gluing group → prepressing → hot pressing → edge cutting → sanding → inspection grade → Packing and storage.

Veneer finishing: Veneer finishing includes cutting, assembling, and repairing. In this process, the dried veneer and spare veneer are cut into standard veneer and spliced veneer, and the narrow veneer is spliced into a whole veneer. The defective veneer can be repaired to meet the quality requirements.

Hot pressing: the coated slab is firmly glued together by a certain temperature and a certain pressure. With the change of the temperature and moisture content of the slab during hot pressing, the wood is gradually compressed and the thickness of the slab is gradually reduced.

Edge cutting: the hot pressed wool board is cut into specification board.

Sanding: the surface of the plywood is sanding, so that the surface is smooth and beautiful.

How to choose plywood

1, look at the material: in the selection, we should focus on the material, pattern and color of the panel, plywood has the difference between the front and back, in the selection should choose the board smooth and smooth, wood grain is clear, not rough, flat and no sluggish feel of the plywood, there should be no damage, injury, hard injury, scar and other defects, but also according to the environment and cost reasonable choice of plywood grade and category.

2, listen to the sound: should choose not loose glue plywood, if the hand knock plywood parts, the sound is brittle, it proves that there is no degumming phenomenon of good quality.

3, look at the type: Generally speaking, the number of layers of plywood is the base, of course, occasionally there are even numbers, so in the selection, you can judge the product by the number of layers, commonly used building plywood types are plywood, plywood and so on.

4, look at the type: different environmental factors under the composition of the product is different, for home decoration, it is best to choose precious wood products cutting thin wood veneer plywood, and to meet the GB50222 “building interior decoration design fire code” provisions.