D - Textiles – Paper – 01 – D
Patent
D - Textiles, Paper
01
D
D01D 5/11 (2006.01) D04H 1/56 (2006.01) D04H 3/16 (2006.01)
Patent
CA 2227553
This invention relates to a system and process for modifying the resulting properties of a flash spun plexifilamentary film-fibril web and spunbonded nonwoven sheets made from such webs. In particular, the system includes specifically designed letdown chamber (24) arrangements wherein the solution of polymer and spin agent transitions from a single phase solution to a two phase solution in the letdown chamber (24) prior to spinning at the spin orifice (26). The method comprises altering the configuration of the letdown chamber (24) to alter the properties of the web and the sheet products made therefrom.
Système et procédé de modification des propriétés résultantes d'un filage éclair d'une nappe film-fibrilles plexifilamentaire et de feuilles non tissées réalisées à partir de telles nappes. Le système repose en particulier sur des dispositifs de chambres de descente spécialement conçus dans lesquels la solution de polymère et l'agent de filage transitent d'une solution à phase unique à une solution à phase double dans la chambre de chute (24) avant filage à l'orifice de filage (26). Le procédé consiste à modifier la configuration de la chambre de chute (24) pour modifier les propriétés de la nappe et les produits en feuilles réalisés à partir de celles-ci.
Franke Ralph A.
Lim Hyun S.
Marshall Larry Ray
Bennett Jones Llp
E.i. Du Pont de Nemours And Company
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