Selection and Purchasing Skills of Medium Density Board
With the improvement of people’s living standards, people’s awareness of health, environmental protection and beauty has been continuously enhanced. Density board has been welcomed by the people and applied to life. Today, I’d like to talk to you about some skills in choosing and buying medium density boards. Usually we can distinguish the quality of density plate from two aspects.
According to the standard, the density plate can be divided into E0, E1, E2 and CARB P2 according to its free formaldehyde content. E2 formaldehyde emission is less than 5 mg/L; E1 formaldehyde emission is less than 1.5 mg/L, which can be directly used for indoor decoration; E0 formaldehyde emission is less than 0.5 mg/L. The release of formaldehyde in grade 2 of CARB was less than 0.3 mg/L. Among them, E0, E1 and E2 refer to domestic standards, while CARB P2 refers to European and American standards. Consumers should try their best to buy products with low formaldehyde emission when choosing density boards, which are safe.
The blue pore size ranges from 0.27 to 0.98 nanometers and is arranged in crystals. At the same time, it has weak electricity. The molecular diameters of formaldehyde, ammonia, benzene, toluene and xylene are between 0.4 and 0.62 nanometers, and they are all polar molecules. They have the characteristics of preferential adsorption of harmful gases such as formaldehyde, benzene, TVOC, etc. to achieve the effect of purifying indoor air.
Surface cleanliness: There should be no obvious particles on the surface of density plate with good surface cleanliness. Particles are caused by impurities brought into the process of pressing, which not only affects the beauty, but also makes the paint film easy to peel off.
Surface smoothness: When touching the surface with hand, it should have a smooth feeling. If the feeling is more astringent, it means that the processing is not in place.
Surface smoothness: The surface of density plate should be bright and smooth. If the surface is uneven from the side, it indicates that there is a problem with the material or coating technology.
Overall elasticity: Harder plates are inferior products.
Strength: High-quality density plate has good strength. Hold one end of the plate with both hands and tremble a few times. If the plate is strong, the quality of the plate is better. Poor density plate may break in the process of tremor.
Appearance: The length of high-quality density board fibers is less than 2 mm, the length is uniform, the shape is delicate, and the MDF board surface has no defects such as local softness, depression, drum and so on, if there are these defects, the quality is lower; Product color distinction, according to different materials, the color of poplar wood is yellowish, except for the process of rinsing and peeling the pine miscellaneous and the color of Eucalyptus Salix is yellowish, white. Generally, the board is black.