7—A Theory for the Development of Wool Fibre Crimp on Drying

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Abstract
The changes of curvature or crimp occasioned by changes in the moisture content of segmented wool fibres are shown mathematically to depend upon the length changes in the cortical cells, and upon the diameter of the fibre and the relative proportions of the ortho- and para-sections, as well as, to a smaller extent, upon the ratio of their extension moduli. Experimental evidence suggests that there is adequate support for the theory. This change on drying is an important contribution to the apparent crimp of wool fibres.

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