Plastic article or earthenware shaping or treating: apparatus – Continuous filament forming or film casting means with...
Patent
1997-05-09
1998-05-12
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Continuous filament forming or film casting means with...
425 722, 2642101, 2642108, B29C 5500
Patent
active
057501513
ABSTRACT:
An improved apparatus is provided for the formation of a spunbonded fibrous web suitable for service in nonwoven end uses. A melt-processable thermoplastic polymeric material is melt-extruded to form a multifilamentary spinline, is quenched, and is wrapped about at least two spaced driven draw rolls that are surrounded by a shroud prior to collection to form a web, and is bonded to form a spun-bonded nonwoven product. The draw rolls exert a pulling force on the multifilamentary spinline so as to accomplish drawing of the molten multifilamentary spinline prior to complete solidification. The shroud makes possible the self-stringing of the spinline around the draw rolls. A pneumatic jet located at the exit end of the shroud assists in the contact of the multifilamentary spinline with the draw rolls in order to facilitate the imposition of a uniform pulling force and expels the multifilamentary spinline in the direction of its length toward a support where it is collected. The formation of a highly uniform spun-bonded nonwoven is made possible on an expeditious basis.
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Brignola Edward L.
Fleck Alvin A.
LaCroix Price W.
Willis Edward K.
Zimmerman, deceased Leon H.
Hopkins Robert
Reemay Inc.
Woo Jay H.
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