What is plywood What is plywood

Plywood is a three-layer or multi-layer plate-like material made of wood segments that are rotary cut into veneer or cut into thin wood by wood planer, and then glued together with adhesive, usually with odd layers of veneer, and the fiber direction of adjacent layers of veneer is glued perpendicular to each other.

Plywood English: Plywood furniture is one of the commonly used materials, is a kind of wood-based panel. A group of veneers is usually glued together perpendicular to each other in the direction of the wood grain of adjacent layers, and the surface and inner layers are usually symmetrically arranged on both sides of the central layer or core.

It is made of a slab made of glued veneer crisscrossed in the direction of the wood grain, pressed under heated or unheated conditions. The number of layers is generally odd, and a few have even numbers. There is little difference in the physical and mechanical properties in the vertical and horizontal directions.

Commonly used are plywood, plywood, etc. Plywood can improve the utilization rate of wood and is a major way to save wood. It can also be used for aircraft, ships, trains, automobiles, construction and packing boxes.

Plywood, also known as plywood, is a log that is softened by cooking and cutting into large sheets along the annual ring, and is made of drying, finishing, gluing, assembling billets, hot pressing, and sawing. The number of wood chips should be an odd number, the gluing time should be so that the fibers of adjacent wood chips should be perpendicular to each other, and the plywood should have 4 grades: special grade, first class, second class, and third class. The specification of the splint is 2440mm long and 1220mm wide, and the thickness of the splint is different for different specifications, but it is generally a multiple of 3.

The splint is divided into three splints, five splints, nine splints, twelve splints, fifteen splints and eighteen splints in terms of thickness. From the material, there are as:

Willow wood, poplar, ice candy, white cloud incense, mountain osmanthus, etc., can be divided into three-layer thick core board and multi-layer core board from the number of plywood glued into synthetic number.

It is cut into small sections with logs, rotary cutting, and veneer, dried, glued, typesetting, cold pressing, hot pressing, sanding, pasting, edge banding, packaging!

<> plywood is a three-layer or more plate-like material made of three or more layers of wood that is rotary cut into veneer or planed into thin wood and then glued together with adhesive. In order to improve the anisotropy of natural wood as much as possible, so that the characteristics of plywood are uniform and the shape is stable, the veneer thickness, tree species, moisture content, wood grain direction and production method should be the same when making plywood. The number of layers must be odd, such as:

Three, five, seven, nine plywood, etc., in order to balance various internal stresses.

China's relevant national standards stipulate that ordinary plywood is divided into coniferous plywood and hardwood plywood according to tree species; According to the water resistance and durability of the adhesive line, it can be divided into one to four types of plywood.

A class of plywood, weather-resistant, boiling water resistant plywood. It has the properties of durability, boiling or steam treatment and antibacterial, and is made of phenolic resin glue or other adhesives with equivalent properties. The product is suitable for aviation, shipbuilding, carriage manufacturing, concrete formwork or wood products that require good water resistance.

Class II plywood, water-resistant plywood. It can be impregnated in cold water, can withstand a short period of hot water impregnation, and has antibacterial and other properties, but is not resistant to boiling, and is made of urea-formaldehyde resin glue or other adhesives with equivalent properties. It is suitable for wood products such as carriages, ships, furniture manufacturing and interior decoration, etc., as well as other indoor purposes.

Three types of plywood, moisture-resistant plywood. It can withstand short-term cold water impregnation, and is made of low resin content urea-formaldehyde resin glue, blood glue or adhesive with equivalent performance, which is suitable for furniture manufacturing, packaging and other indoor use of wood products.

The four types of plywood, which have a certain gluing strength, are made of soybean glue or other adhesives with comparable properties. It is mainly used for packaging and wood products for general indoor use.

In the decoration market, there are too many decoration materials, and there are many divisions in wood-based panels, with their own advantages and disadvantages. One of them is called plywood, which is still more common in the decoration market, what material is plywood? What do consumers need to know when buying plywood?

Today, Qeeka Home will give you a brief introduction.

1. What kind of material is plywood?

Plywood is a kind of wooden material, in the production process, first cut the wooden blocks into veneer one by one, and then paste them together with glue, and at the same time, according to the different thickness, the number of layers of plywood will be set to three, and some can reach more than ten layers. Generally speaking, they are superimposed according to odd numbers, so that the two adjacent layers are reproduced in a vertical state, and the physical properties of this plywood are relatively stable.

Second, the characteristics of plywood.

1. The strength of this material is still relatively high, and it is not easy to deform, or because of environmental factors that cause expansion and contraction, and nails are not easy to crack in the later stage.

2. Plywood is a kind of man-made board, so when it is set, its size is large and small, and it can be customized according to needs. In the process of production, the utilization rate of wood is still relatively high, which can save the amount of wood.

3. Plywood has a certain temperature resistance, and will not be affected in a hot environment, and has a long service life.

4. We can't ignore the shortcomings of this kind of plywood, such as the surface is not particularly smooth and flat, and if you want to make it into a cabinet countertop, it is best not to take this kind of board.

3. How do consumers choose plywood?

1. First of all, you need to see whether its appearance is relatively smooth and flat, not too rough to the touch, and no scratches on the surface.

2. Also pay attention to its seams, because they are all pasted together with veneer, and the seams must be very tight.

3. Another point is to pay attention to the fact that plywood is generally an odd number, and if it is an even number, special attention should be paid to it.

Summary: Plywood is also a kind of wooden material, which is different from other materials when making it, and consumers must pay attention to its performance when purchasing, and also need to consider its quality.