Method for improving filament cohesiveness of chopped aramid fiber
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United States of America Patent
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Dec 13, 2011
Grant Date -
Oct 16, 2008
app pub date -
Jul 1, 2006
filing date -
Jul 8, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
The invention pertains to a method for improving filament cohesiveness of chopped aramid fiber including the steps of impregnating a film-forming binding agent into the fiber, drying the fiber, optionally applying a finish to the fiber, and chopping the fiber to pieces of 1 to 16 mm length, characterized in that the fiber prior to applying the binding agent is subjected to a twisting process to obtain a fiber having a twisting level of 10 to 150 tpm and that the chopping of the fiber is performed in a rotary chopper.
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