Taslan

Taslanizing or taslanising is a process for making textured yarns, involving air-texturing or heat-treatment. Taslan is an expired registered trademark of DuPont for this process, first registered on October 19, 1954. In German the word is Luftex. The process is simply feeding a bundle of continuous filament yarns into a small jet nozzle with various amounts of slack (overfeed). High-pressure air creates suction and a turbulent airstream which tangles any slack into a yarn with a similar hand as a spun yarn. It is the turbulent airflow that tangles the fibers. This method of yarn production creates a yarn that is normally more even than spun yarn and does not pill like spun yarn.

Wikipedia →