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What is "Orientation" - Definition & Explanation

a) The degree of parallelism of fibres, usually as a result of a combing or attenuating action on fibre assemblies that causes the fibres to be substantially parallel to the main axis of the web or strand.

b) A preferred direction of linear molecules in the fine structure of fibres and usually caused by so stretching an extruded fibre that the length direction of the molecules tends to lie parallel to the main axis of the fibre.

c) In the case of natural fibres, a preferred direction of linear molecules laid down during growth, e.g. a spiral around the fibre axis in cotton.

The alignment of the crystalline structure in polymeric materials so as to produce a highly uniform structure. Orientation can be accomplished by cold drawing or stretching during fabrication.

Some other terms

Some more terms:

A very soft, extremely lightweight silk made in a plainweave, used chieflyfor linings. Irregularities of threads,caused by the extreme lightness and softness of Chinasilk, are characteristic of...
Made from wool, cotton, linen, silk, rayon, or synthetics. In a basket weave. Monk’s cloth is heavy due to its construction. It is difficult to sew or manipulate as the yarns have a tendency to...
Two or more yarns (at least one of which is folded) (see yarn, doubled) that have been twisted together in one or more operations. NOTE: a) Combinations of folded yarns and single yarns may be...
A weft double knit fabric in which a Jacquard type of mechanism is used. This device individually controls needles or small groups of needles, and allows very complex and highly patterned knits to be...
A class of chemicals including many variants used as water soluble solvents in a variety of cleaning products, latex paint, water-borne wood finishes and other applications. Members of this class...

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