ELECTROSTATIC FILTER MEDIA AND A PROCESS FOR THE MANUFACTURE THEREOF

• Main Authors: WOOD, RAYMON DOUGLAS, FINN, NIALL, SCHUTZ, JURG ARTHUR
• Format: Patent
• Language: English; French
• Published: 07.12.2006
• Subjects: BRAIDING; COTTON-WOOL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS; KNITTING; LACE-MAKING; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROMSOLID MATERIALS OR FLUIDS; MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL; NON-WOVEN FABRICS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS; SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; TEXTILES; TRANSPORTING; TRIMMINGS; WADDING

The present invention relates to an electrostatic filter medium (1) and a process for manufacturing an electrostatic filter (1). The electrostatic filter medium of the present invention is in the form of a non-woven web (1) containing one or more than one type of staple fibre, wherein the non-woven web is electrostatically charged and is compacted such that the electrostatic charge contributes to the filtration properties of the medium for a period of at least 100 days. La présente invention concerne un milieu filtrant électrostatique (1) et un procédé de fabrication d'un filtre électrostatique (1). Le milieu filtrant électrostatique de l'invention se présente sous la forme d'une bande de non-tissé (1) contenant au moins un type de fibres discontinues, la bande de non-tissé étant chargée électrostatiquement et étant comprimée de telle manière que la charge électrostatique contribue aux propriétés de filtrage du milieu pendant une période d'au moins 100 jours.