MDF classification:
According to the different density, it can be divided into high density board, medium density board and low density board (the density of medium density board is 550kg-880kg/m3, and the density of high density board is more than 880kg/m3). Common specifications are 1220*2440mm and 1525*2440mm, and the thickness is 2.0mm~25mm.
Misunderstanding 1: Particleboard is more environmentally friendly than MDF
At present, the boards of panel furniture on the market are mostly particle board and medium density board. Since both boards are made of wood processing and crushing and then mixed with adhesive, the amount of glue determines the chemical composition of the board, that is the degree of environmental protection. The reporter learned that most consumers are very concerned about which of these two types of board is more environmentally friendly. Therefore, many salespeople are promoting their products often mislead consumers. In the interview, a furniture salesman told reporters when introducing the product: “Our boards are all solid wood particleboards from the Northeast. You see, the larger the particles are, the less glue is used, which is the same as the MDF that is glued with glue. Is it more environmentally friendly than their MDF!” Is this really the case? An expert from the China Furniture Association told reporters: “Qualified, that is, MDF that meets the national standard is the same as particleboard, and there is no such thing as a Which one is more environmentally friendly. “The so-called MDF usually refers to MDF. It is a kind of artificial board made of wood or plant fibers through mechanical separation and chemical treatment, mixed with adhesives and waterproofing agents, and then paved, shaped and pressed at high temperature and high pressure. Its density is relatively uniform, and its mechanical properties are close to wood. One of the most popular man-made boards in the world. The difference between particleboard and MDF is: the raw material of particleboard is not completely pulverized into fibers, but pulverized into granules, and then glued and laminated; while MDF is made by completely pulverizing wood raw materials into fibers and then adding glue, pressed together. The density of particleboard is similar to that of medium density fiberboard, but since particleboard is made of particle material and pressed with adhesive, its density is not uniform, the middle is low, and the two ends are high, so its nail holding force is lower than that of medium density fiberboard. Moreover, the surface of MDF is more delicate, and the flatness is higher than that of particleboard. However, particleboard is better in terms of moisture absorption and moisture resistance than MDF, and the price is relatively low. Therefore, it can be said that qualified MDF and particleboard only have their own strengths in function, and there is no such thing as more environmentally friendly.
Misunderstanding 2: Solid wood particle board is a “new environmentally friendly product”
Since the application of panel furniture made of medium density board and particle board that have not reached the national standard has caused many indoor pollution cases, the reputation of these two kinds of boards is not very good. name that misleads consumers. The most common names are to call MDF particle board and particle board. Some salespeople will preceded by the word “solid wood” to indicate that they are “natural and environmentally friendly” products.