Conclusions
1. It has been shown that it is desirable to combine a limited intensity of stretch-draw with a fairly prolonged exposure of the fibrous filament or thread in the hot-draw zone if increased modulus of elasticity is to be obtained.
2. It has been made clear that the ratio of the intensities of plasticised to hot stretch-draw has little effect on the properties of polyvinyl alcohol fibre.
3. It has been shown that the mechanical properties and the water resistance of stretch-drawn polyvinyl alcohol fibre is determined, in the first instance, by the intensity of hot draw, i.e., the orientation processes. The effect of the duration of the hot draw on these properties is manifested only over a limited interval of time, which may enable the orientation processes either to proceed or may worsen them.
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Additional information
Leningrad Branch of the All-Union Scientific-Research Institute for Man-Made Fibre (VNIIV). Translated from Khimicheskie Volokna, No. 6, pp. 45–47, November–December, 1969.
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Lelinkov, O.S., Utevskii, L.E. & Perepelkin, K.E. The effect of certain production conditions of the properties of high-modulus polyvinyl alcohol fibres. Fibre Chem 1, 662–665 (1971). https://doi.org/10.1007/BF00581203
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DOI: https://doi.org/10.1007/BF00581203