Free-fibre-end yarn

An air-jet textured yarn (see textured yarn, Note 1 (viii)) in which the protruding filament loops are cut or broken.
Note: Because of its hairy surface, such a yam resembles a spun staple yam.

Free-Wheeling

In reference to rolls spinning without the application of either driving or braking force.

French seam

A type of tlat folded seam with only one line of stitching visible. Two plies of material are superimposed back to back and stitched together producing a seam with a narrow bight. The plies are then opened out, folded face to face, and stitched again at a distance from the fold sufficient to enclose the edges of the material.
Note.. Formation of this seam is often accompanied by trimming, to maintain the narrow bight and to remove frayed threads.(sub category of seam type)

French welt

A welt made on a rib basis, in which the number of courses with loops intermeshed in one direction is equal to the number of courses with loops intermeshed in the other direction. In making such a welt on a lxl rib, the first and last courses are knitted on both sets of needles and the intermediate courses consist of an equal number of plain courses on each set of needles.(sub category of welt (knitting))

Frenchback

A fabric with a corded twill backing of different weave than the face. The backing which is frequently of inferior yarn gives added weight warmth and stability to the cloth.

Frequency

In uniform circular motion or in any periodic motion the number of revolutions or cycles completed in unit time.

Friction calendering

The process of passing fabric through a calender in which a highly polished, usually heated, steel bowl rotates at a higher surface speed than the softer (for example, cotton or paper-filled) bowl against which it works, thus producing a glaze on the face of the fabric that is in contact with the steel bowl. The friction ratio is the ratio of the peripheral speed of the faster steel bowl to that of the slower bowl and is normally in the range 1.5 to 3.0.

Friction False-Twist Texturing

See TEXTURING False-Twist Method.

Friction spinning

A method of open-end spinning which uses two surfaces moving in opposing directions to insert twist into an assembly of fibres positioned between them.
Note 1: Usually the external surfaces of two rollers are used, at least one of which is perforated so that air can be drawn through it to facilitate fibre collection. Twisting occurs near the line of closest proximity of the rollers where the fibre assembly is rotated by frictional contact with the roller surfaces.
Note 2.. High rates of twist insertion can be achieved due to the large difference between the yarn

Friction tests

Tests which measure frictional properties during relative movement between fibre/fibre, yarn/yarn or fabric/fabric, or between fibres, yarns and fabrics and other surfaces such as metals, ceramics, etc.
Note: The frictional properties of textile materials may show variations from those predicted by the classical laws of solid friction.

Friction-twisting

The generation of false-twist (see false-twisting) by a device in which the yarn lies in contact with one or more surfaces of high friction driven in a direction at a substantial angle to the yarn axis.
Note: In practice, belts, bushes, cylinders or disks are used, one rotation of which generates many turns of twist. (See also pin-twisting.)

Friez'e

1. A heavy woollen overcoating made from a coarse wool. The fabric is consolidated by very heavy milling and then raised to give a rough fibrous surface with the nap laid in one direction. The weave structure is hidden by the milling and raising.
2. nap friez'e: a friez'e in which the nap is rubbed into small pills or balls.

Friezé

1. A term applied when the pile of a velvet plush velour or other pile fabric is uncut. A friezé fabric is sometimes patterned by shearing the loops at different lengths. Friezé fabrics are widely used for upholstery. 2. A cut-pile carpet made of highly twisted yarns normally plied and heat-set. A kinked or curled yarn effect is achieved. Excellent durability results from the hard-twist pile yarns.

Fringe

1. An edging or border of loose threads, tassels, or loops.
Note: These may be produced by the constituent threads or by threads added to a fabric after weaving or knitting.
2. (Narrow fabric) A trimming having, on one or both edges, cut or looped weft threads, which extend substantially beyond the width of the warp threads to form a decorative edge. The threads forming the fringe are sometimes bunched or knotted together to increase the decorative effect.
Note 1: Tassels, balls, or other adornments may be added.
Note 2.. That part of a fringe comprising both warp and weft is known as the 'heading'.
Note 3: That part of a fringe containing only weft is known as the 'skirt'. (See also bullion fringe.)

Fris'e pile

The pile of a carpet, in which curl has been induced by over-twist or by other means.(sub category of pile(carpet))