Process for the fabrication of polyethylene fibres by the high speed spinning of ultra-high molecular weight polyethylene

摘要

An approximately 1 to 6% by weight solution is prepared from polyethylene with a molecular weight Mw of at least one million and a solvent. This solution is extruded at an extrusion temperature of TE = 180 to 250 ° C with an extrusion speed VE = 5 to 150 m / min into a spinning shaft which is heated to a temperature of 100 to 250 ° C below the nozzle exit surface by means of a heating device is held. The threads are drawn off at a speed of Vw of at least 500 m, preferably 1,500 to 4,000 m / min, and the solvent is removed without further drawing. The threads obtained are particularly suitable for the production of technical yarns, protective clothing, bulletproof vests, ropes, parachutes. In the form of staple fibers, they are suitable for reinforcing various plastics.