Papermakers fabric with stacked machine and cross machine...

D - Textiles – Paper – 21 – F

Patent

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Details

D21F 7/08 (2006.01) D03D 15/00 (2006.01) D21F 1/00 (2006.01)

Patent

CA 2219108

The present invention provides a papermakers fabric having a system of flat monofilament machine direction yarns (hereinafter MD yarns) which are stacked to control the permeability of the fabric. The system of MD yarns comprises at least upper and lower layers of yarns. Preferably, each upper MD yarn is paired in a vertically stacked orientation with a lower MD yarn. Preferably, multiple layers of stacked CMD yarns are provided which are maintained in the stacked relationship by the flat stacked MD yarns to provide suitable void volume within the fabric. In a low permeability embodiment, at least the upper MD yarns are flat monofilament yarns woven contiguous with each other.

L'invention concerne une toile pour machines à papier ayant un système de fils monofilaments plats longitudinaux superposés, ce système permettant de réguler la perméabilité de la toile. Le système de fils longitudinaux comprend au moins une couche supérieure et une couche inférieure de fils. De préférence, chaque fil longitudinal supérieur constitue avec un fil longitudinal une paire de fils superposés verticalement. De préférence, on prévoit des couches multiples de fils transversaux superposés qui sont maintenus dans leur position de superposition par les fils longitudinaux superposés plats, de manière à assurer un volume vide approprié dans la toile. Dans une forme d'exécution à faible perméabilité, au moins les fils longitudinaux supérieurs sont des fils monofilaments plats tissés de manière serrée.

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