Conclusions
Polycaproamide fibers which have been treated with the preparations Nowguard A, VKhA, and the Bulgarian thermostabilizer retain their initial strength better on prolonged heat-treatment. Fibers stabilized with Nowguard 445 lose their initial strength fastest and to the greatest extent.
On treatment under elevated temperature conditions (205°C for 16 h), almost all specimens fail, except specimens treated with the Bulgarian thermostabilizer, Nowguard A, or VKhA. In this case the fibers maintain a part of their initial strength.
The best resistance to repeated bending and the least additional irreversible elongation are characteristic of fibers which have been thermostabilized with preparation N1.
Complex studies of thermostabilizers used in the manufacture of polycaproamide tire cord fibers for pneumatic tires have shown that the thermostabilizer Nl is the most effective.
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Literature cited
Additional data to the Technical Information Bulletin (Ciba-Geigy Co.).
N. P. Gankov, Ts. P. Kapralyakov, P. I. Filipov, and E. A. Stanev, Khim. Volokna, No. 2, 51–53 (1982).
R. V. Uzina, Technology of Treatment of Man-Made Fiber Tire Cord in the Rubber Industry [in Russian], Khimiya, Moscow (1973), pp. 7–52.
V. M. Levin and V. K. Murav'ev, Khim. Volokna, No. 3, 32–35 (1981).
Additional information
Translated from Khimicheskie Volokna, No. 4, pp. 51–52, July–August, 1983.
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Gankov, N.P., Mekhmedov, M.M., Gankova, M.P. et al. Some service properties of heat-stabilized "vidlon" polycaproamide tire cord fibers. Fibre Chem 15, 309–311 (1984). https://doi.org/10.1007/BF00548323
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DOI: https://doi.org/10.1007/BF00548323