Melt blowing of tubular filters
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 25, 1995
Grant Date -
N/A
app pub date -
Oct 6, 1993
filing date -
Oct 6, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus and method for producing a meltblown continuous and seamless nonwoven tube is described. The apparatus comprises a meltblowing die for extruding two groups of polymer thermoplastic filaments onto a rotating mandrel to form a multilayer layer tube thereon. The tube is withdrawn from the mandrel by a rotating screw. The present apparatus is capable of producing nonwoven tubes having variable fiber diameters and/or composition in the radial direction, making them ideally suited for filtration purposes.
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