Hot-tube spinning

Partly oriented yarn (POY) is a large product spun at about 3500 m min with a round cross-section, and draw-textured (DR 1.8, at about 1000 m min ) in a separate step. Fully oriented yarn (FOY) can be spun at >6000 m min or drawn in the spin-line (hot-tube spinning, HTS), or spin-drawn. Typical yarn titers are 30, 50, 76, 110, and 176 dtex, and the filament titers 2-3 dtex, although there is a trend toward values of 1 dtex or lower. 

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