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You searched in Glossary Terms for [R]. We found 37 matching entries.
Radio frequency identification (RFID) systems:
radio frequency identification (RFID) systems provide a method to automatically identify and locate manufactured products over distances of up to several hundred metres. They rely on storing and remotely retrieving data from electronic tags using devices which can transmit and pick up data via radio waves. The systems usually comprise a universal infrastructure which consists of electronic readers, tags and radio-frequency identification management computer software.
Raffia:
a fibre obtained from the leaves of the raffia palm.
Last referenced in:
Global technical textiles business update, 3rd quarter 2013
Ramie:
a bast fibre similar to flax, the fibre used for making linen textiles.
Last referenced in:
Survey of the European yarn fairs for spring/summer 2015
Raschel:
a two-needle warp knitting system.
Last referenced in:
Fast track: trends in performance apparel at ISPO Munich 2014
Ratiné:
a cloth with a rough surface, which has been achieved by finishing and/or the use of fancy yarns.
Rayon:
a term used to describe fibres made from regenerated cellulose. (See also viscose, modal and acetate.)
Last referenced in:
Survey of the European yarn fairs for spring/summer 2015
Reaction spinning:
a process for producing man-made fibres in which polymerisation is achieved during the extrusion of one set of reactants into another set of reactants.
Last referenced in:
Stretch fibres and fabrics: reaching new levels of comfort
Ready-to-wear:
a term used to describe clothing which has been produced in a factory and is offered for sale as a finished garment in a range of standard sizes.
Last referenced in:
Global apparel markets: business update, 1st quarter 2014
Real twist:
twist inserted in a yarn through the rotation of a yarn end (as in uptwisting or downtwisting) or the repeated passage of a thread loop around an end, as in two-for-one twisting.
Redox:
a type of chemical reaction in which one of the reagents is reduced, while another is oxidised.
Redox agent:
a substance which promotes redox reactions.
Reed:
a device consisting of several wires closely set which separate warp threads in a loom. The reed determines the spacing of the warp threads, guides the weft carrying device, and beats up the weft against the fell of the cloth.
Last referenced in:
Apparel business update, 3rd quarter 2008
Reed width:
the width of the fabric in the reed.
Regain:
the ratio of the weight of water in a material to the oven-dry weight of the material.
Reinforcement (composites):
a fibre which, when encapsulated in a polymer resin matrix, forms a composite or fibreglass laminate.
Last referenced in:
Editorial: innovations in composites for technical textiles
Reinforcement (geotextiles):
the ability of a geotextile to reduce stresses or contain deformation in
geotechnical structures. The geotextile enhances the shear strength of the soil
mass by adhering to the adjacent soil layers. The geotextile layers are
normally placed across the potential failure planes to carry the tensile forces,
which cannot be borne by an unreinforced soil mass.
Reinforcing component:
see reinforcement.
Repco spinning:
a technology for spinning yarns using a system of false twisting in which the rate of false twisting can be varied.
Resin:
see prepreg, composite; also used as another word for polymer.
Last referenced in:
Global apparel markets: product developments and innovations, 1st quarter 2014
Resist treatment:
a treatment applied to part of a fabric which causes the area treated to resist the take-up of dye.
Last referenced in:
Microencapsulation: for enhanced textile performance
Retention:
the weight of fluid remaining after a freely swollen fibre, yarn or fabric is subjected to a pressure of 0.5 lb/inch2.
Reticulated foam:
Reticulated foams differ from conventional foams in their cell structure. Reticulation is a process in which cell membranes are destroyed in a controlled explosion and then fused with the cell ribs. Reticulation produces open-celled foam which is especially suitable for the filtration and
purification of air and liquids.
Retting (flax):
the subjection of a crop of flax or deseeded flax straw to chemical or biological treatment in order to make fibre bundles more easily separable from the woody part of the stem. See also decortication.
Revetment:
a support structure in civil engineering made of riprap (coarse armour stone) or concrete.
Last referenced in:
Markets for geosynthetic products and profiles of five leading manufacturers
RFID:
see radio frequency identification (RFID) systems.
Rib fabric:
a knitted fabric with a rib pattern. Depending upon the usage, the pattern can be altered to exhibit different rib effects. Rib fabric is used mainly in round necks and cuffs for certain types of T-shirts. It is also used for making undergarments.
Ribbon yarns:
yarns that are woven or knitted in the form of a ribbon.
Ring spun:
a spinning system in which twist is inserted in a yarn by using a revolving traveller. This method gives a tighter twist than the more modern, faster and usually cheaper open end spinning process.
Last referenced in:
The world nonwovens industry: part 3 -- ten smaller producers, 1st quarter 2008
Rinses:
washing processes during which denim fabric is desized, rinsed and softened. Rinsing provides fabrics with a softer handle but does not discolour them.
Rip stop:
a lightweight woven fabric containing corded yarns spaced at regular intervals—in both the warp and the weft—which form squares on the surface of the fabric in order to prevent a tear in the fabric from spreading. Common applications include parachutes, outerwear and activewear.
Riser:
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
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
Roving:
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
RP:
reinforced plastic. See also FRP, GFRP, GRP.
Last referenced in:
Apparel business update, 3rd quarter 2008
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.
Ruching:
Adding a frill of lace or other material, often pleated.