Texturised yarn: why some polyester feels slick and some soft

Texturised yarn is continuous filament yarn, usually polyester, that has been processed to put crimps, coils or loops along its length. Untreated filament is smooth and packs flat, so it can look glassy and feel slick. Texturising gives it bulk, some stretch, better cover and a hand (feel) closer to a natural-fiber yarn. False-twist texturing twists, heat-sets and untwists the filaments so they keep a coiled crimp. Air-jet texturing uses a turbulent air stream to blow loops into the filaments. Compared with spun yarn it has few free fiber ends, which helps against pilling. But its surface loops and crimp can be pulled out by sharp edges, so snagging is the trade-off to check.