Density board, also known as density fiberboard (MDF), is a board made of wood fiber or other plant fiber, which is prepared by fiber preparation, applied with synthetic resin, and pressed under heating and pressure conditions. According to its density, density board can be divided into high-density board, medium-density board and low-density board. Among them, the nominal density of medium-density board ranges from 0.65g/cm³ to 0.80g/cm³.