CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS

**Definition:** This place covers:

The post treatment of fibres and filaments (usually synthetic) to give them a structure more like natural fibres i.e. crimped or curled to make them easier to work with during further processing.

**Limiting references (this place does not cover):** - Yarns or threads, e.g. fancy yarns; Processes or apparatus for the productionthereof -> D02G3/00 - Unwinding, paying-out, forwarding, winding or coilingfilamentary material not intimately associated with spinning or twisting -> B65H - Cores, formers, supports or holders for coiled or wound material, e.g. bobbins -> B65H - Mechanical methods or apparatus in the manufacture of artificial filaments, threads, fibres, bristles, or ribbons -> D01D - Chemical features in the manufacture of artificial filaments, threads, fibres, bristles, or ribbons; apparatus specially adapted for the manufacture of carbon filaments -> D01F - Twisting oakum -> D01G35/00 - Spinning or twisting -> D01H - Making chenille -> D03D , D04D3/00 - General aspects of chemical treatment -> D06M - Testing yarns, rovings, slivers, fibres, or fibre webs -> G01

**Glossary:** - Fibre: a relatively-short, elongated member of natural or artificial material. - Filament: an endless or quasi-endless, elongated member of natural or artificial material. - Yarn: a unitary assembly of fibres, usually produced by spinning. - Thread: an assembly of yarns or filaments, usually produced by twisting. - False twisting: synthetic filaments are twisted, heat set while twisted and then untwisted to form a crimp - Texturing or texturizing: curling and crimping - Stuffer box: a confined space where yarns or filaments are compressed and deformed