Fiber

Fiber or '''fibre'''The spelling ''fibre'' is used in Commonwealth countries, and is sometimes used in the United States as well. is a class of Material s that are continuous filaments or are in discrete elongated pieces, similar to lengths of Thread . Fibers are of great importance in the Biology of both Plant s and Animal s, for holding Tissue s together. Human uses for fibers are diverse. They can be spun into filaments, thread, string or Rope . They can be used as a component of Composite materials. They can also be matted into sheets to make products such as Paper or Felt . Fibers are often used in the manufacture of other materials.

Fibers used by man come from a wide variety of sources.

Natural Fiber s include those produced by plants, animals, and geological processes. They can be classified according to their origin:

---, Linen , Jute , Flax , Ramie , Sisal and Hemp . Plant fibers serve in the manufacture of Paper and Cloth .

--- Animal Fiber s consist largely of particular proteins. Instances are Spider Silk , Sinew , Catgut and Hair (including Wool ).

--- Mineral Fiber s comprise Asbestos . Asbestos is the only naturally occurring Mineral fiber.

Man-made fibers may come from natural raw materials or from synthetic chemicals.

---Many types of fiber are manufactured from natural Cellulose , including Rayon , Modal , and the more recently developed Lyocell . Fiberglass and Optical Fiber , which are made from purified natural Quartz , are also man-made fibers that come from natural raw materials.

--- Synthetic Fiber s are a subset of man-made fibers, which are based on synthetic chemicals (often from Petrochemical sources) rather than arising from natural materials by a purely physical process. Such fibers are quite often made from Nylon , Polyester , or Acrylic polymers, although pure Polyacrylonitrile fibers are used to make Carbon Fiber . More exotic fibers have strong bonding between polymer chains (e.g. Aramid s), or extremely long chains (e.g. Dyneema or Spectra). Elastomer s can even be used, e.g. Spandex .

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Fiber

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