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Comparison of Melt and Solution Spinning

Applications of PVA The largest application of PVA fibers is in paper and non-woven fabrics, where a fraction of water-soluble fiber is often used as a binder. Further applications are in twines, ropes, fabrics (tatami mats), and tarpatdins. Gel-spun , very strong, PVA fibers have become an important replacement for asbestos in cement reinforcement. [Pg.953]

PVA filament yarns are used almost exclusively in industrial applications where high strength is important, such as in fishing nets, ropes and cables, reinforcement of (high-pressure) hoses, and conveyor and transmission belts. PVA is not suitable as a tire cord, however, because of its inadequate fatigue behavior. [Pg.953]

Initially, the temperature will be flat throughout the filament (at the spinning temperature, for example 300°C) and the surrounding cooling air temperature is assumed to be constant (20°C). Gradually a temperature profile will be formed in [Pg.953]

Extraction of solvent from a filament Fourier number Fo=Z)t/D  [Pg.954]

For solution spinmng, the analysis proceeds similarly, but now in terms of concentrations instead of temperatures. For example, we assume an initial solvent concentration of 0.8 (polymer concentration 20%) and solidification at c = 0.3 [Pg.954]


See other pages where Comparison of Melt and Solution Spinning is mentioned: [Pg.953]    [Pg.953]    [Pg.954]    [Pg.955]   


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