Many synthetic fibers have been developed specifically to replace natural fibers because synthetics usually behave more predictably and are more uniform in size. Often, synthetic fibers are less costly than their natural counterparts. In the garment industry, for example, the acrylic and rayon fibers were developed to replace more costly natural wool and silk. For engineering purposes, metal, ceramic, glass, and organically derived synthetic fibers are more significant. Nylon, for example, is used for belting, nets, hose, rope, parachutes, webbing, ballistic cloths, and as reinforcements in tires.
Shielding is particularly important for housings of computers, copiers, and other business machines.
Among the strongest materials are metal fibers formed by controlled solidification and cold drawing. Some nonmetallic fibers such as aluminum oxide and silicon carbide are nearly as strong as metal fibers but have a higher modulus of elasticity. Fibers in a metal matrix combine the strength of the fiber with ductility or other characteristics of the matrix. The pistons are produced by the squeeze-cast process. E-glass is available as chopped fiber, milled fiber, continuous roving, woven roving, woven fabric, and reinforcing mat.