Process of making spun-bonded web

Details Process of making spun-bonded web Process of making spun-bonded web

D - Textiles, Paper

01

D

D01D 5/16 (2006.01) D01D 5/098 (2006.01) D01D 10/00 (2006.01) D04H 3/14 (2006.01) D04H 3/16 (2006.01)

Patent

CA 2248258

An improved process and apparatus for the formation of a spun-bonded fibrous web suitable for service in nonwoven end uses. A melt-processable thermoplastic polymeric material is melt-extruded to form a multifilamentary spinline (2), is quenched, and is wrapped about at least two spaced driven draw rolls (14, 16) that are surrounded by a shroud (12) prior to collection to form a web (40), and is bonded to form a spun-bonded nonwoven product. The draw rolls (14, 16) exert a pulling force on the multifilamentary spinline (2) so as to accomplish drawing of the molten multifilamentary spinline (2) prior to complete solidification. The shroud (12) makes possible the self-stringing of the spinline (2) around the draw rolls (14, 16). A pneumatic jet (32) located at the exit end (24) of the shroud (12) assists in the contact of the multifilamentary spinline (2) with the draw rolls (14, 16) in order to facilitate the imposition of a uniform pulling force and expels the multifilamentary spinline (2) in the direction of its length toward a support (38) where it is collected. The formation of a highly uniform spun-bonded nonwoven product is made possible on an expeditious basis.

Procédé et appareil amélioré de formation d'un voile fibreux tissé-lié applicable à des utilisations finales de non-tissé. Une matière polymère thermoplastique pouvant être traitée à chaud est extrudée à chaud pour former une ligne de filage multifilamentaire (2), est trempée, et est enroulée autour d'au moins deux rouleaux d'étirage espacés entraînés (14, 16) entourés d'un capot (12) avant la collecte pour former un voile (40), et est liée pour former un produit non-tissé filé-lié. Les rouleaux d'étirage (14, 16) exercent une force de traction sur la ligne de filage multifilamentaire (2) afin d'étirer la ligne de filage multifilamentaire fondue (2) avant la solidification complète. Le capot (12) permet d'enfiler automatiquement la ligne de filage (2) autour des rouleaux d'étirage (14, 16). Un jet pneumatique (32) situé à l'extrémité de sortie (24) du capot (12) aide le contact de la ligne de filage multifilamentaire (2) avec les rouleaux d'étirage (14, 16) afin de faciliter l'application d'une force de traction uniforme et fait sortir la ligne de filage multifilamentaire (2) dans la direction de sa longueur vers un support (38) où elle est collectée. La formation d'un non-tissé filé-lié hautement uniforme est possible de manière rapide.

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