Wool fiber - Definition of Wool fiber

Wool Fiber1 Nazmul Ehsan ,Southeast University... Wool Texture6 Nazmul Ehsan,Southeast University... Nazmul Ehsan, Southeast University... 9 Nazmul Ehsan ,Southeast University... Wool po

Wool Fiber

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Nazmul Ehsan ,Southeast University

Wool 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

World wool production: Clean 2007 (%

share)

Namul Ehsan,Lecturer,Southeast University 3

World fibre production: 2007 (% share)

Namul Ehsan,Lecturer,Southeas 4

Virgin wool consumption at retail stage 2007

Namul Ehsan,Lecturer,Southeast University

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Wool Texture

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Nazmul Ehsan,Southeast University

Nazmul Ehsan,Southeast University

Nazmul Ehsan, Southeast University

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

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Wool polymer

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Wool polymer in alpha helix

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 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.

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Shearing the Rams by Tom Roberts, 1890

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Nazmul Ehsan, Southeast University

Nazmul Ehsan, Southeast University

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

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Wool bale

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

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Nazmul Ehsan, Southeast University