Improved meltblowing method and system

Details Improved meltblowing method and system Improved meltblowing method and system

D - Textiles, Paper

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D01D 5/098 (2006.01) B05C 5/02 (2006.01) D01D 4/02 (2006.01) D01D 5/26 (2006.01) B05B 7/08 (2006.01)

Patent

CA 2234324

Disclosed are meltblowing methods and systems, and more particularly parallel plate meltblowing die assemblies and meltblowing system configurations useable for precisely controlling the dispensing and uniform application of meltblow adhesive filaments onto moving substrates. More particularly the method includes the steps of dispensing a first fluid from a first orifice to form a first fluid flow at a first velocity, dispensing a second fluid from not more than two second orifices associated with the first orifice to firm separate second fluid flows at a second velocity along substantially opposing flanking sides of the first fluid flow, convergently directing the separate second fluid flows toward the first fluid flow, and drawing the first fluid flow with the separate second fluid flows at asecond velocity greater than the first velocity of the first fluid flow, wherein the drawn first fluid flow is attenuated to form a first fluid filament. The apparatus carries out the method.

Méthodes et systèmes de fusion-soufflage et plus particulièrement ensembles de matrices de fusion-soufflage en plaque parallèle et configurations de systèmes de fusion-soufflage servant à contrôler de façon précise la distribution et l'application uniformes de filaments adhésifs en fusion-soufflage sur substrats en mouvement. Les méthodes comprennent plus particulièrement les étapes de distribution d'un premier fluide provenant d'un premier orifice pour constituer un premier flux à une première vitesse, la distribution d'un second fluide provenant de moins de deux seconds orifices associés au premier orifice pour raffermir séparément un second flux à une seconde vitesse le long des deux côtés opposés du premier flux. Le processus permet ainsi de diriger de façon convergente le second flux vers le premier flux et d'entraîner le premier flux avec le second flux séparé à une seconde vitesse supérieure à la vitesse du premier flux, alors que l'entraînement du premier flux est atténué pour constituer un premier filament fluide. Le dispositif permet de réaliser la mise en oeuvre de la méthode.

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