Drying and drawing process for polybenzimidazole continuous filamentary materials
Abstract
Abstract POLYBEBZIMIDAZOLE CONTINUOUS FILAMENTARY MATERIALS E.G., MONOFILAMENT AND MULTIFILAMENT STRAND, CABLE, YARN, TOW, ETC) WHICH CONTAIN ANY SUBSTANTIAL QUANTITIES OF RESIDUAL MOISTURE, SUCH AS SOLVENT OR WASH WATER, MAY EXPLODE OR BURST DURING DRAWING. IN THE PRESENT PROCESS, THE POLYBENZIMIDAZOLE CONTINUOUS FILAMETARY MATERIAL IS DRIED BY CONTINUOUSLY PASSING THE MATERIAL IN THE DIRECTION OF ITS LENGTH THROUGH AN APPROPRIATE DRYING ZONE TO REDUCE THE MOISTURE CONTENT TO A LEVEL AT WHICH THE MATERIAL MAY BE DRAWN WITHOUT SUBSTANTIALLY ADVERSELY EFFECTING THE TENSILE PROPERTIES OR COLOR OF THE MATERIAL. THE RESULTING DRIED MATERIALL IS CONTINUOUSLY PASSED IN THE DIRECTION IF ITS LENGTH FROM THE DRYING ZONE INTO A DRAWING ZONE AND THERE DRAWN ON A CONTINUOUS BASIS.
Inventors
- 👤 A Prince
Bibliographic Details
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