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Wool Fiber

Nazmul Ehsan ,Southeast University

WOOLWool is a natural highly crimped protein hair fiber derived from sheep. The fineness and the structure and properties of the wool will depend on the variety of sheep from which it was derived. Major varieties of wool come from Merino, Lincoln, Leicester, Sussex, Cheviot, and other breeds of sheep.

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World wool production: Clean 2007 (% share)

Namul Ehsan,Lecturer,Southeast University

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World fibre production: 2007 (% share)

Namul Ehsan,Lecturer,Southeast University

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Virgin wool consumption at retail stage 2007

Namul Ehsan,Lecturer,Southeast University

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Wool Texture

Nazmul Ehsan,Southeast University

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Nazmul Ehsan,Southeast University

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Nazmul Ehsan, Southeast University

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Wool polymer

Wool fibers are extremely complex, highly crosslinked keratin proteins made up of over 17 different amino acids. The amino acid content and sequence in wool varies with variety of wool. The wool protein chains are joined periodically through the disulfide crosslinked cystine, a diamino acid that is contained within two adjacent chains. About 40% of the protein chains spiral upon themselves and internally hydrogen bond to form an a-helix.

Nazmul Ehsan ,Southeast University

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Wool polymer

Nazmul Ehsan, Southeast University

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Wool polymer in alpha helix

Nazmul Ehsan, Southeast University

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Shearing

Sheep shearing, shearing or clipping is the process by which the woollen fleece of a sheep is cut off. The person who removes the sheep's wool is called a shearer. Typically each adult sheep is shorn once each year.

Nazmul Ehsan, Southeast University

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Shearing the Rams by Tom Roberts, 1890

Nazmul Ehsan, Southeast University

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Nazmul Ehsan, Southeast University

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Wool bale

A wool bale is a standard sized and weighted pack of graded and sorted wool compressed by the mechanical means of a wool press.

Nazmul Ehsan, Southeast University

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Wool bale

Wool bales at Devon & Cornwall Wools Ltd, South Molton, Devon, England. Each bale contains 330 Kg of graded wool (approx. 110 fleeces), wrapped in plastic and tied by wire. Dimensions: 43" * 28* * 41"

Wool bale

Nazmul Ehsan, Southeast University