MDF (medium density fibre-board) is the most famous engineered wood product.
The raw material is made up of conifer wood, reduced in chips, that are compacted using a screw feeder, heated/steamed for 30–120 seconds to soften the wood, then joined with liquefied wax and fed into a defibrator. The defibrator maintains a high pressure and temperature while grinding the wood chips into a pulp.
The pulp continues the process in a blow line, where is joined by resin/wax, then it goes in a dryer chamber. After these processes the dried pulp follows some heat press steps and it’s sometimes laminated.
This product has homogenous solidity, suitable for large surfaces, painting, varnishing, …