Do you know about plywood
2023-02-03
Do you know about plywood
When it comes to plywood, many people may not know it very well. Although they only know it is a kind of plywood for decoration or construction, there are many kinds of plywood. Generally, it can be distinguished according to thickness, material, size, etc.
1、 What is plywood?
Plywood, in fact, is a kind of board bonded with adhesive. The front side of plywood is called "panel", and its reverse side is called "back board". The middle is called "core plate". Generally, the board core is made by cutting some wood into thin pieces, then pasting these thin pieces layer by layer in the direction of wood grain with adhesive, and then symmetrically placing the panel and the inner layer on both sides of the board core or the central layer, and then overlapping the glued veneer in the direction of wood grain to form the board embryo, and then heating and pressing. The common plywood tiredness includes plywood, plywood and so on. Common plywood materials include poplar, willow, beech, etc. Plywood is a material made of thin or thin wood chips "wood". These thin wood chips or "thin wood" are glued together with the adjacent layers, and the wood grain of the adjacent layers rotates at most 90 degrees from each other. It is the engineering wood in the wood-based panel family, including medium density fiberboard (MDF) and particle board (particle board).
2、 What are the advantages of plywood?
The utilization of resources is more reasonable. In the process of making plywood, too much sawdust will not be produced, and a certain amount of wood will be saved to make the utilization of wood resources more reasonable. Plywood has good nail grip and bearing capacity, and is suitable for making all kinds of furniture, as well as building, automobile, aircraft and other fields. Plywood has a high performance-price ratio. Compared with other wood-based panels, the price of plywood is moderate. Compared with particleboard, its performance is better, so the performance-price ratio is relatively high.
1. Strength
Because plywood is bonded by some thin skins, these thin sheets also form a right-angle structure. As we all know, the structure strength of right-angle will be better, not easy to crack and not easy to bend.
2. Price
Plywood is made of some thin skins, so the price will also be lower than that of other boards.
3. Wide application range
Plywood is not only used for home decoration, but also for aircraft, ships and containers.
3、 What are the disadvantages of plywood?
The molding ability is poor, and the hardness and strength of plywood are relatively high, so it is not easy to make modeling. It is only suitable for making frame products and not suitable for making decorative products. It is easy to deform. It is difficult to control the moisture content of the plywood during the production process, so it is easy to deform.
1. Smoothness
The surface of plywood is not as smooth as that of density board and solid wood board, so it is often not used as a window facade.
2. No moisture
Plywood is made by bonding with multilayer sheets, so it is easy to become wet if the plywood layers are not well bonded.
3. Containing formaldehyde
As we mentioned above, plywood is made of adhesive, so it contains formaldehyde
4、 How to buy plywood?
1. Appearance
The wood grain of high-quality plywood is relatively clear, and it feels smooth and flat, without cracking and bulging. Of course, there will be cracks and rashness on some plywood. These plywood are of inferior quality. Please polish your eyes!
2. Sound
The strength of plywood also determines the quality of plywood. The method to check the strength is very simple. It is to pick up one end of the plywood to hear whether there is a "creak" sound. If there is, then the strength is not high.
3. Water content
The moisture content of the board is very important. If the moisture content is too high, the board is prone to crack and deformation. The inspection method is that if you feel cold when touching the plywood, the moisture content is relatively high.
4. Plate core
The core is an important factor that determines the quality of plywood. Although we can't identify it with the naked eye in the middle of the board, we can knock it with hands. If the sound is uneven, the core appears hollow. It is also important to check whether the seam of plywood is tight and not uneven
1、 What is plywood?
Plywood, in fact, is a kind of board bonded with adhesive. The front side of plywood is called "panel", and its reverse side is called "back board". The middle is called "core plate". Generally, the board core is made by cutting some wood into thin pieces, then pasting these thin pieces layer by layer in the direction of wood grain with adhesive, and then symmetrically placing the panel and the inner layer on both sides of the board core or the central layer, and then overlapping the glued veneer in the direction of wood grain to form the board embryo, and then heating and pressing. The common plywood tiredness includes plywood, plywood and so on. Common plywood materials include poplar, willow, beech, etc. Plywood is a material made of thin or thin wood chips "wood". These thin wood chips or "thin wood" are glued together with the adjacent layers, and the wood grain of the adjacent layers rotates at most 90 degrees from each other. It is the engineering wood in the wood-based panel family, including medium density fiberboard (MDF) and particle board (particle board).
2、 What are the advantages of plywood?
The utilization of resources is more reasonable. In the process of making plywood, too much sawdust will not be produced, and a certain amount of wood will be saved to make the utilization of wood resources more reasonable. Plywood has good nail grip and bearing capacity, and is suitable for making all kinds of furniture, as well as building, automobile, aircraft and other fields. Plywood has a high performance-price ratio. Compared with other wood-based panels, the price of plywood is moderate. Compared with particleboard, its performance is better, so the performance-price ratio is relatively high.
1. Strength
Because plywood is bonded by some thin skins, these thin sheets also form a right-angle structure. As we all know, the structure strength of right-angle will be better, not easy to crack and not easy to bend.
2. Price
Plywood is made of some thin skins, so the price will also be lower than that of other boards.
3. Wide application range
Plywood is not only used for home decoration, but also for aircraft, ships and containers.
3、 What are the disadvantages of plywood?
The molding ability is poor, and the hardness and strength of plywood are relatively high, so it is not easy to make modeling. It is only suitable for making frame products and not suitable for making decorative products. It is easy to deform. It is difficult to control the moisture content of the plywood during the production process, so it is easy to deform.
1. Smoothness
The surface of plywood is not as smooth as that of density board and solid wood board, so it is often not used as a window facade.
2. No moisture
Plywood is made by bonding with multilayer sheets, so it is easy to become wet if the plywood layers are not well bonded.
3. Containing formaldehyde
As we mentioned above, plywood is made of adhesive, so it contains formaldehyde
4、 How to buy plywood?
1. Appearance
The wood grain of high-quality plywood is relatively clear, and it feels smooth and flat, without cracking and bulging. Of course, there will be cracks and rashness on some plywood. These plywood are of inferior quality. Please polish your eyes!
2. Sound
The strength of plywood also determines the quality of plywood. The method to check the strength is very simple. It is to pick up one end of the plywood to hear whether there is a "creak" sound. If there is, then the strength is not high.
3. Water content
The moisture content of the board is very important. If the moisture content is too high, the board is prone to crack and deformation. The inspection method is that if you feel cold when touching the plywood, the moisture content is relatively high.
4. Plate core
The core is an important factor that determines the quality of plywood. Although we can't identify it with the naked eye in the middle of the board, we can knock it with hands. If the sound is uneven, the core appears hollow. It is also important to check whether the seam of plywood is tight and not uneven
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