Integrated spin-draw-texturizing process for manufacture of texturized polyamide filaments

US4096226A · kind A · utility

Assignee

• BASF SE

Inventors

• Wolfgang Martin · Ludwigshafen, DE
• Dieter Herion · Bischofswerda, DE
• Dimiter Bayew
• Wolfgang Bauer · Germering, DE

Key dates

• Filing date: May 12, 1977
• Grant date: Jun 20, 1978
• Expiry date: May 12, 1997

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D02J1/22
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Integrated process for continuous spinning, drawing and texturizing of synthetic linear high molecular weight polyamide polymers, in which the following steps are effected in immediate succession: PA1 (a) melt-spinning filaments of said synthetic linear high polyamide polymers, preferably poly-.epsilon.-caprolactam, at temperatures of between 260.degree. and 295.degree. C and a spin-draw ratio of between 1:10 and 1:60, PA1 (b) drawing the spun filaments on at least two forwarding elements, of which the initial element has a surface temperature of between 50.degree. and 120.degree. C and the final element has a surface temperature of between 80.degree. and 350.degree. C, at a draw ratio such that the drawn filament, on leaving the drawing stage, has an extensibility of between 10 and 50% and preferably of between 20 and 35%, and PA1 (c) texturizing said filaments at a velocity of between 800 and 3,000 m/min by an air jet process and preferably between 1,600 and 2,000 m/min, the overfeed in the texturizing stage being from 10 to 50% at a filament temperature, prior to texturization, of between 50.degree. and 180.degree. C and preferably of between 100.degree. to 130.degree. C.