STEAM-DRAWING POLYAMIDE MONOFIL AND REDRAWING UNDER HEAT

摘要

ABSTRACT OF THE DISCLOSUREPolyamide monofilaments of heavy denier and havingboth high straight and high loop tenacity, are prepared bythe coupled steps of melt-spinning, quenching, drawing andwinding. The quenching involves passage of the monofilamentthrough an air gap and water bath and the drawing is carriedout in two stages. Pressurized steam is employed in thefirst draw stage to facilitate the drawing and to deorientthe surface polymer of the monofilament,