Process for removing residual spin solvent from a gel spun filament, the filament, multi-filament yarn and products comprising the filament
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United States of America Patent
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Feb 16, 2016
Grant Date -
Apr 8, 2010
app pub date -
Mar 21, 2008
filing date -
Mar 27, 2007
priority date (Note) -
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Abstract
Process for removing residual spin solvent from a gel spun, UHMwPE filament having an effective diameter of above 16 μm, comprising the steps of: removing residual spin solvent from the filament to a level of below 100 ppm at elevated temperature, while keeping the filament taut. The invention also relates to gel spun UHMwPE filament having an effective diameter of above 16 μm and a residual spin solvent residue of less than 100 ppm. Preferably the filament has a creep rate, measured at 50° C., under a load, so that the initial stress is 600 MPa, of less than 510−6 sec−1.
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