| abstract |
PURPOSE: To raise flexibility and to improve strength such as knot strength, etc. and color tone, by drawing undrawn polyamide monofilaments by two-stage process and subjecting them to heat treatment of relaxation under specific conditions, respectively. n CONSTITUTION: Undrawn polyamide monofilaments [preferably a mixture of 80W98wt% nylon 6 and 20W2wt% nylon 66] are drawn primarily in a solution at 50W80°C at 2.2W4 times, preferably 2.5W3.5 times draw ratio, and further drawn secondarily in steam at 98W110°C steam at 1.1W2 times, preferably 1.2W 1.6 times draw ratio. The filaments are subjected to heat treatment of relaxation in a gaseous atmosphere at 160W230°C in a winding ratio of 0.85W0.95, preferably 0.88W0.92, to give the desired monofilaments. n COPYRIGHT: (C)1984,JPO&Japio |