Medium-density fiberboard (MDF) is an engineered wood product made by breaking down hardwood or softwood residues into wood fibers, usually in a fiber mill, mixing them with wax and resin binders, which are then The pressure forms it into panels.  MDF is generally denser than plywood. It consists
Comparison with natural woodMDF contains no knots or rings, making it more uniform than natural wood during cutting and use.  However, MDF is not perfectly isotropic because the fibers are tightly packed together by the sheets. Typical MDF has a hard, flat, smooth surface, which makes it ideal fo
The content of aluminum in the earth's crust is relatively highMainly in aluminosilicate ore, as well as bauxite and cryolite Alumina is a kind of white amorphous powder.
Millions of old people in the world suffer from Alzheimer's disease. Many scientists have found that Alzheimer's disease is closely related to aluminum.