SPENCER CHEMICAL CO HENDERSON KY NYLON TECHNICAL DEPT
Nylon NX-121 has all the physical properties essential to withstand the most rigorous service conditions. The continuous polymerization process makes available resins with variable viscosities which can be adapted to each fabricators particular requirements. Satisfactory heat aging results can be obtained with these materials, particularly if processed within recommended temperature ranges. The effects of water bath temperature and distance on heat aging properties were negligible, and abrasion resistance varied only slightly under different processing conditions. Author
Annual Wire and Cable Symposium (8th), Asbury Park, N. J., 2 Dec 1959.