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What is "Fibre Length" - Definition & Explanation

a) Crimpled Length

The extent of crimped fibre substantially freed from external restraint, and measured with respect to its general axis of orientation.

b) Fibre Extent

The distance in a given direction between two planes (each perpendicular to the given direction) that just enclose the fibre without intersecting it.

NOTE:

1. If the fibre is in a sliver (q.v.) (or yarn, roving, etc.) and the direction of the extent is not specified, the "given direction" is to be taken as the axis of the sliver.

2. It should be noted that the extent of a fibre is a variable property that differs from the straightened length of the fibre according to circumstances; thus in a card web, the example, where the fibres are in a state of considerable disarray, the extent of a fibre after it has been passed through one or more drawing processes. If, for any reason, a fibre is subject to a stretching force, its extent in the direction of the force may be greater than its straightened length.

c) Staple Length

A measurement by which a sample of fibrous raw material is characterised according to its technically most important fibre length.

NOTE:

The staple length of wool is usually taken as the length of the longer fibres in a hand-prepared tuft or "staple" in its naturally crimped and wavy condition (see crimp). In cotton, on the other hand, the staple length corresponds very closely to the modal or most frequent length of the fibres when measured in a straightened condition.

The length of individual wool fibres.

Some other terms

Some more terms:

Frieze is a coarse woollen cloth with a nap on one side, that was raised by scrubbing it to raise curls of fibre (French: frisť). In the 19th century rough cheap frieze was made of wool mixed with...
A double-faced fabric woven with a tightly twisted spun warp and two sets of soft spun filling yarns. The fabric is thick and warm and its filling yarns are frequently napped to produce a soft...
The density of a material divided by the density of water. Expressed as a number greater than 0. Materials with specific gravity less than 1.00 will float and materials with specific gravity greater...
A selvedge that varies in width. NOTE: Variations in weft tension or lack of control of the warp ends within the selvedge may result in such unevenness. Pulled-in selvedges are caused by pulling in...
The forced circulation of dye liquor through packages of fibre, yarn or fabric, without limitation of temperature. NOTE: The use of the term "pressure dyeing" in this connection is deprecated. (See...

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