What's HDF?
High-density fiberboard is compatible with all the advantages of MDF due to its excellent physical properties. It is widely used in interior and exterior decoration, office, high-end furniture, audio, and high-end car interior decoration. It can also be used as an antistatic floor in computer rooms , Wall panels, anti-theft doors, wall panels, partitions and other production materials. It is also a good material for packaging products. In recent years, it has replaced high-grade hardwood and directly processed into composite flooring and laminate flooring; it is also used on the cargo protection frame during transportation, and in modern home decoration frameless paintings, such as the national registered trademark visual life frameless painting. Make home life more environmentally friendly.
Generally, high-density boards are used in custom furniture.
And this type of high-density fiberboard is mainly used for electronic circuit boards, which is called PCB boards.
https://www.fiberboardchina.com/high-density-fiberboard/hdf-board-jy-series/1092x1245x2-4mm-pcb-board.html