We consider the conditions for building packages of high linear density glass and basalt yarns, using a delayed-action laying mechanism. We establish the reasons for the appearance of such defects as wedging of the bobbins in the bobbin holder, slipping of the filled package from the bobbin holder, and also the appearance of nonuniform winding density. We present analytical and graphical relationships letting us select the package building parameters for which the considered defects do not occur.
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Translated from Khimicheskie Volokna, Vol. 50, No. 6, pp. 104-107, November-December, 2018.
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Appendix
where r1 is the outer radius of the yarn support, m; r2 is the outer radius of the take-up (package), m; ì is the Poisson’s ratio of the take-up; c = [μ − 1 + r1E2/(δ1E1)]/[μ + 1 + r1E2/(δ1E1)] is the coefficient that takes into account compliance of the yarn support; δ1 – is the wall thickness for the yarn support, m; E1 is the modulus of elasticity of the yarn support, MPa; E2 is the modulus of elasticity of the take-up, MPa; dsp is the reduced diameter of the yarn, m.
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Sekhin, A.P., Koroteeva, L.I. & Khozina, E.N. Characteristic Features of Building Packages of High Linear Density Glass and Basalt Yarns. Fibre Chem 50, 588–591 (2019). https://doi.org/10.1007/s10692-019-10032-5
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DOI: https://doi.org/10.1007/s10692-019-10032-5