Roller-conveyor steamer

A steamer, in which fabric is supported and carried in a relaxed state on an endless conveyor made of stainless steel slats and driven by rollers at each end.

Roller-embossed film (film-to-fibre technology)

A polymer film that has been indented to induce easy splitting during subsequent stretching.
Note 1.. The indentations are produced by using a profiled embossing-roller and may be either longitudinal and followed by uniaxial stretching to produce individual filaments, or patterned and followed by biaxial stretching to produce a fine net.
Note 2: Polymer films may also be embossed for decorative purposes.

Roller-setting

The distance between the nips of the pairs of rollers in a roller-drafting or stretch-breaking system (see converting).
Note: Another common use of the term 'ratch' is to specify the distance between the front roller nip and the release point of the pins in a pin-drafting system.

Rolling

The winding of finished fabric on tubes.

Rolling locker machine

A plain net machine in which the motion of the carriages is imparted by fluted rollers,.

Rope

An article of cordage, more than approximately 4mm in diameter, obtained when:
(i) three or more strands are laid (see lay 3) or plaited (see braiding) together; or
(ii) a core is covered by a braided or plastic film sheath. Types of rope are:braided rope; sennit rope; sinnet ropeA rope formed by braiding or plaiting the strands together.cable laid ropeA rope formed by three or more ropes twisted to form a helix around the same central axis. The ropes that become the secondary strands are 'S' lay and the finished cable is 'Z' lay or vice versacombined ropeA rope in which the strand centres are made of steel and in which the outer portions of each strand are made from fibrous material.double braided ropeA rope in which a number of strands are plaited to form a core and around which are plaited further strands to form a sheath. The core lies coaxially within the sheath.8-strand plaited ropeA rope normally composed of 4 pairs of strands plaited in a double 4-strand roundsennit.hard laid ropeA rope in which the length of lay of the strands and/or the rope is shorter than usual, resulting in a stiffer and less flexible rope.hawser laid ropeA rope of three strands which are twisted to form helixes around the same central axis.laid ropeA rope in which 3 or more strands are twisted to form helixes around the same central axis. (See also ordinary lay.)shroud laid ropeA 4-strand rope with or without a core with the strands twisted to form a helix round the central axis.soft laid ropeA rope in which the length of lay of the strands and/or the rope is longer than usual resulting in a more flexible rope which is easily deformed.spring lay ropeA rope made with 6 strands over a main core, each strand of which has alternating wire and fibre components laid over a fibre core.

Rope Mark

A fabric defect consisting of long irregular longitudinal markings on dyed or finished goods. A principal cause is abrasion while wet processing the fabric in rope form. Rope marks are often related to overloading of the fabric during wet processing.

Rope marks

Long crease marks in dyedorfinished goods running approximately in the warp direction. They are caused during wet processing in the rope form and may be the result of
(i) the formation of creases along which abrasion or felting may occur, or
(ii) imperfect penetration or circulation of the processing liquors.

Rope-form processing

The treatment of fabric that has been drawn into the form of a rope, often by passage through a ring (pot-eye) of appropriate diameter.

Roping yarn

A yarn from which a strand is produced.

Rot Resistance

The ability of textile materials to resist physical deterioration resulting from the action of bacteria and other destructive agents such as sunlight or sea water.

Rotoflex

A fatigue or endurance test developed by Goodyear for industrial yarns or cords.

Rotor spinning

A method of open-end spinning which uses a rotor (a high speed centrifuge) to collect and twist individual fibres into a yarn.
Note.. The fibres on entering the rapidly rotating rotor are deposited around its circumference and temporarily held there by centrifugal force. The yarn is withdrawn from the rotor wall and, because of the rotation of the rotor, twist is inserted. (See also spinning .)

Rough

A fabric condition in which the surface resembles sandpaper. Principal causes are the shuttle rebounding in the box jerky or loose shuttle tension an incorrectly timed harness and wild twist in the filling. © 2001 Celanese Acetate LLC

Rough Selvage

See LOOPY SELVAGE.