The top layer is wear-resistant paper, which is mainly used to damage and wear the colored paper below. In addition, it also has the functions of waterproof and preventing the free formaldehyde in the base material from volatilizing.
The second layer is colored paper. Wood grain is printed on this paper.
The third layer is the base material layer, which is made of high-density fiberboard. The general thickness is 7mm, 8mm, 10 mm, 12 mm, 15 mm.
The fourth layer is the balance layer. The function is to balance the weight of wear-resistant paper and patterned paper on the base material, prevent the board from warping, and in addition, prevent the ground from getting wet.
Attached is a picture in English, but you can clearly see the decomposition of four layers.
There are more questions, welcome to discuss.