1
Stanley R Cochran, Hung H Yang: Yarn drying process. E I Du Pont de Nemours and Company, February 23, 1988: US04726922 (7 worldwide citation)

Aromatic polyamide filaments of higher strength are obtained by drying air-gap spun filaments under tension while controlling the moisture content of the dried filaments.


2
Stanley R Cochran, Francis W Strahorn: Yarn heat treatment apparatus. E I Du Pont de Nemours and Company, February 19, 1985: US04500278 (4 worldwide citation)

Aromatic polyamide filaments are treated at high speed under tension by passage over an array of closely spaced, heated rolls at 175.degree.-300.degree. C., the filaments stretched 0-1.6% and passed over a second array of additional closely spaced, heated rolls at 175.degree.-300.degree. C., cooled ...