Apparatus for extruding a single aromatic heterocyclic polymeric

Plastic article or earthenware shaping or treating: apparatus – Continuous filament forming or film casting means with...


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264103, 264184, 264203, 264245, 425 71, 425377, 425404, D01D 506




An apparatus for making aromatic heterocyclic polymeric fibers having enhanced compressive strength is disclosed. Individual polymeric fibers, while being made according to otherwise conventional methods, are full twisted as they are drawn from a spinnerette hole so that their internal fibrils and microfibrils become entangled. The twisting is performed before coagulation of the fibers. The entangled fibrils and microfibrils are believed to provide mutual support to adjacent fibrils/microfibrils to resist buckling under compression.

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