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    in Terms
    in Terms & Definitions
structure which holds a pipe that conveys gas or oil from a well to a drilling platform. The riser extends from the sea floor—where it protects the well from seawater—to the platform.
Last referenced in: Markets for Man-Made Fibre Ropes and Cordage (Technical Textile Markets Issue 47)

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.
Last referenced in: Innovations in fibres, textiles, apparel and machinery, November-December 2003 (Textile Outlook International Issue 108)

a collection of relatively fine fibrous strands used in the later or final processes of preparation for spinning.
Last referenced in: Developments and innovations in the apparel sector, 3rd quarter 2008 (Global Apparel Markets Issue 3)

reinforced plastic. See also FRP, GFRP, GRP.
Last referenced in: Apparel business update, 3rd quarter 2008 (Global Apparel Markets Issue 3)

RTM (composites):
resin transfer moulding; RTM allows the moulding of components which have complex shapes and large surface areas with a good surface finish on both sides. The process is suited to short and medium runs and is employed in many transport applications such as truck cabs. This process consists of placing reinforcements in the mould before injecting the resin. Polyesters, epoxies, phenolics and acrylics are usually used. Various kinds of moulds are used, and heat may be applied to assist the cure, in which case a steel mould may be necessary. Low profile resins can be used to improve surface finish and appearance. Alternatively, low-pressure RTM allows cheaper composite tooling to be used. The reinforcement can be continuous filament mats or fabrics. The use of preforms from continuous filament strand mats can increase the production rate.

Rubber printing:
see foam printing.

Adding a frill of lace or other material, often pleated.