Stiffness of the self-supporting optical cables in the conditions of low negative temperatures

In paper, the analysis of stiffness variations of self-supporting optical cables at low temperatures is represented. Influence of a hydrophobic compound on stiffness of optical cables is considered. Results of researches of designs of the self-supporting optical cables having various resistance to the stretching loadings are given. The studied samples of optical cables had one or two layers of kevlar yarns, and also differed with the fact that had an outer polyethylene sheath or at the same time both outer and inner sheaths. All studied samples initially had various stiffness measured at a temperature of +200C. The received results of researches are compared to results of the similar researches executed for the optical cables intended for blowing-in in a duct. It is shown that the stiffness increases with decreasing temperature mainly for with constructions hydrophobic filling.