Comparison of particleboard and MDF

The particleboard is broken by logs and processed by high temperature and high pressure. The middle layer of the particleboard is wood chips, and the two sides are finely organized wood chips, which are pressed into plates. The surface layer is in the form of a powder layer, and the homogenized particle board is the best. The molecular structure of the particle board is tight and the bending strength is high. The particle board has the advantages of being not easily deformed and having strong nail holding power. The disadvantage of particleboard is that it is not easy to be bent or curved, which requires high processing machinery.

The MDF is made of plant wood fiber as the main raw material, and is processed by hot grinding, paving, hot pressing and the like. It features uniform internal structure, good machinability, easy engraving and various parts and shapes. MDF (450-780) generally has a good surface flatness, so when the surface needs to be boring and forming, and the pasting surface is a softer material (such as a blister board), the MDF is used to ensure the film is covered. flat surface. Therefore, it is generally used for laminate flooring, door panels, and the like.

Moisture resistance: MDF is formed by pressing wood powder, and the surface is flat. Therefore, when the surface needs to be boring and forming, and the surface is softer (such as blister board), medium density is often used. The plate is used to ensure that the surface of the film is flat. However, since the raw materials are all very fine wood powder, if the particle board is immersed in water due to the moisture-proof property, the wood fiber is long in the particle board, and the structure of the wood is more retained, so the particle board will not expand until it expands to a certain extent. (8%-10%). Therefore, the comprehensive performance of moisture resistance can be said that the particle board is superior to the density board. Therefore, European and American furniture kitchen cabinet companies do not have a more common use of MDF for the box material has a certain reason.

Environmental protection: Recently, almost all furniture and kitchen cabinets in Europe and America use particleboard. For example, Germany's prestigious BERLONIROSSI and S-BEKA use particleboard. Several large domestic factories use a full set of imported equipment (investment of more than 200 million yuan). It can also produce particleboard with tight molecular structure and high flexural strength. Generally speaking, if the surface decoration surface is imported from Germany, most of them are produced by large factories, and are used for high-grade furniture, buyers and suppliers pay more attention to market reputation, so there are fewer problems. However, there are some small domestic factories that can only produce some common white light board and eucalyptus board. Due to the backward equipment and production process, the produced boards are poor in bearing capacity, bending resistance and deformation strength. It is easy to loosen afterwards, and the fastening strength is insufficient after loosening, and it expands rapidly after encountering water. And the formaldehyde content is extremely high, dozens of times higher than the national standard, which is very harmful to the human body. It is the quality of this type of sheet that tarnishes the reputation of particleboard and makes consumers mistakenly believe that the quality of particleboard is inferior. The MDF has not been in the history for a long time, and the original trees are getting scarcer, so a plate is needed instead. Therefore, there is a MDF, but because of the large amount of glue used in the MDF production process, if the quality of these glues is not good, or the instability will cause the MDF to be too high, the MDF mainly detects the formaldehyde emission and structural strength, and the density. The plate is divided into E1 grade and E2 grade according to the formaldehyde emission amount, and the formaldehyde emission amount exceeds 30mg/100g. In general, most of the MDFs of the upper-scale manufacturers are qualified. Most of the MDF on the market is E2 grade, and E1 grade is less. On the whole, the environmental protection factor of particleboard is much higher than that of MDF. Moreover, MDF is mostly used for door panels or for styling, and is not practical for cabinets.

Nailability: The MDF is composed of powder and is easily swelled when exposed to water. Therefore, it can't be used as a box, and because of its poor nailing, under normal circumstances, the MDF nails are pulled out and then pulled out. This can't be repeated 5 times, so it can't be used. However, the particle board is made of wood chips, which are pressed into a board, which has the characteristics of wood and has a certain nail holding force. Under normal circumstances, it can be repeated about 10 times.

Compressiveness: The middle layer of the particle board is wood long fiber, and the two sides are finely organized wood fiber, which is pressed into a board. The molecular structure is tight and the bending strength is high. We have done the same experiment using the same thickness and density of MDF and particle board with the same weight of 50 kg, after 2 months, the MDF is severely deformed, and the particle board is slightly deformed). Due to its high hardness, strong nail holding ability and good lateral load-bearing capacity, particleboard is suitable for the connection between cabinets and laminates. At present, all cabinets in Europe and America use particleboard. The well-known cabinets in China also use particleboard as the cabinet. . The density board is suitable for the door panel because of its uniform density. Some brands make the cabinets all made of particleboard or MDF, which is unscientific and can be easily deformed after a long time.

Generally, the main parameters are determined according to the requirements of the material handling system, the conditions of the loading and unloading sites, the relevant production process and the characteristics of the materials.
â‘  conveying capacity: Conveyor capacity refers to the amount of material transported per unit of time. In the delivery of bulk material, the hourly delivery of material mass or volume calculation; in the delivery of articles into pieces, the number of hours per hour delivery.
â‘¡ conveying speed: improve the transmission speed can improve the transmission capacity. When the conveyor belt is used as a pulling member and the conveying length is large, the conveying speed is increased. However, high-speed operation of the belt conveyor should pay attention to vibration, noise and start, braking and other issues. For the chain as a tractor conveyor, conveyor speed should not be too large to prevent increased power load. At the same time the process of operation of the conveyor, conveyor speed should be determined in accordance with the production process requirements.
â‘¢ component size: conveyor component size, including conveyor belt width, strip width, hopper volume, pipe diameter and container size. The size of these components directly affect the transport capacity of the conveyor.
â‘£ conveying length and inclination: the length of the transmission line and the size of the angle of a direct impact on the total resistance of the conveyor and the required power.

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