... 70 years of the 20th century is widely used in metallurgy, machinery, building materials, petroleum, ... through the centrifugal force thrown into the fiber, usually 3 to 9 microns in diameter ... fiber-processing, can be made into plates, tubes, felt, ribbons, paper and a variety of products, should be used ... blanket;rock wool coated with metal mesh,fiber glass cloth,fiberglass blanket,aluminum foil ...