Process for making oriented melt-blown microfibers
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United States of America Patent
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Aug 25, 1992
Issued Date -
N/A
app pub date -
Jan 16, 1990
filing date -
Dec 21, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for preparing melt-blown microfibers comprising extruding fiber-forming material through the orifices of a die into a high-velocity gaseous stream where the extruded material is rapidly attenuated into fibers, directing the attenuated fibers into a first open end of a tubular chamber disposed near the die and extending in a direction parallel to the path of the attenuated fibers as they leave the die, introducing air into the tubular chamber at a velocity sufficient to maintain the fibers under tension during travel through the chamber, and collecting the fibers after they leave the tubular chamber.
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