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Rheological and heat transfer aspects of the melt spinning of monofilament fibers of polyethylene and polystyrene
Author(s) -
Acierno Domenico,
Dalton J. Nelson,
Rodriguez Jorge M.,
White James L.
Publication year - 1971
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1971.070151007
Subject(s) - materials science , composite material , polystyrene , spinning , fiber , nusselt number , polyethylene , boundary layer , heat transfer , thermodynamics , reynolds number , polymer , physics , turbulence
Two experimental studies of the melt spinning of fibers have been carried out using low‐density polyethylene and polystyrene. First, isothermal spinning experiments were carried out and the relationship between the fiber kinematics and drawdown force was studied. The data were correlated by using the following two methods: (1) the concept of a non‐Newtonian elongational viscosity and (2) a nonlinear integral theory of viscoelastic fluids. In the second experiment, the spinline temperature profile of a monofilament fiber being pulled down from a spinneret through stagnant air was measured and the heat transfer coefficient computed. A correlation between the local Nusselt number and a fiber Reynolds number was obtained. An integral boundary layer analysis of forced convection heat transfer from a descending fiber was carried out.