Self-crimping fluoropolymer and perfluoropolymer filaments and fibers
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United States of America Patent
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Issued Date -
Aug 6, 2009
app pub date -
Jan 31, 2008
filing date -
Jan 31, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Disclosed is a method and device for creating three dimensional (3D) self-crimping fluoropolymer(s) and perfluoropolymer(s) filaments via extrusion through a spinneret plate orifice with a hole and elliptical gap and using die swell to close the elliptical gap in the filament forming a seam causing uneven stresses in the longitudinal length of the filament while cooling thereby causing the filament to self-crimp toward the seam.
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