The equation of spinning of molten polymers in the stationary non-isothermal state have been solved by an analytical numerical method so as to obtain temperature $ T(s)$ and section $ A(z)$ profiles along the spinning axis $ z$. $ T(z)$ and $ A(z)$ are thus correlated with the molecular parameters of the molten polymer: viscosity, density, and extrusion temperature, and polymer mass-flow rate. Furthermore, the correlation has been obtained between fiber quality and steady-state solutions. A critical collection rate and the critical extrusion output have been deduced from such correlations. Above such critical values, breakage of the molten polymer takes place.
A mathematical model for spinning molten polymer and conditions of spinning / Prastaro, Agostino; Parrini, P.. - In: TEXTILE RESEARCH JOURNAL. - ISSN 0040-5175. - STAMPA. - 2:45(1975), pp. 118-127. [10.1177/004051757504500206]
A mathematical model for spinning molten polymer and conditions of spinning.
PRASTARO, Agostino;
1975
Abstract
The equation of spinning of molten polymers in the stationary non-isothermal state have been solved by an analytical numerical method so as to obtain temperature $ T(s)$ and section $ A(z)$ profiles along the spinning axis $ z$. $ T(z)$ and $ A(z)$ are thus correlated with the molecular parameters of the molten polymer: viscosity, density, and extrusion temperature, and polymer mass-flow rate. Furthermore, the correlation has been obtained between fiber quality and steady-state solutions. A critical collection rate and the critical extrusion output have been deduced from such correlations. Above such critical values, breakage of the molten polymer takes place.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
