Optimized wax for sealing the edge of a filter sheet

Details Optimized wax for sealing the edge of a filter sheet Optimized wax for sealing the edge of a filter sheet

B - Operations, Transporting

01

D

B01D 25/00 (2006.01) B01D 25/176 (2006.01) B01D 39/08 (2006.01)

Patent

CA 2305519

A filter sheet having a fluid impermeable wax layer coursing about an enclosed area of the filter sheet which is permeable to the fluid to be filtered, wherein the wax of the fluid impermeable wax layer has a durometer reading of about 75 to about 100 Shore A hardness at 25 ~C and 85 ~C, a melt point of about 110 ~C to about 180 ~C, and a viscosity of less than about 100 cP at 155 ~C and preferably comprises ethylene bis stearamide.

La présente invention concerne une feuille de filtre pourvue d'une couche fluide de cire imperméable entourant une zone fermée du filtre, laquelle zone est perméable au fluide à filtrer. En l'occurrence, la cire de la couche de cire imperméable au fluide présente une dureté Shore de 75 à 100 environ à 25 ·C et 85 ·C, un point de fusion de 110 ·C à 180 ·C environ, et une viscosité inférieure à 100 cP à 155 ·C. Cette cire comporte de préférence un éthylène di-stéaramide.

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