Filter medium

A filter has non-woven stiffening layer(s) of synthetic and polymer fibers, filtration layer(s) attached to surface(s) of stiffening layer, covering layer(s) attached to side of filtration layer remote from stiffening layer and optionally non-woven microfiber layer(s). The non-woven fabric of stiffe...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MEITINGER, HANS-JUERGEN, HASSMANN, CHRISTIAN, UMMINGER, JUERGEN, PLOETZ, KURT, SCHOEPS, MICHAEL
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TRANSPORTING
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Beschreibung
Zusammenfassung:	A filter has non-woven stiffening layer(s) of synthetic and polymer fibers, filtration layer(s) attached to surface(s) of stiffening layer, covering layer(s) attached to side of filtration layer remote from stiffening layer and optionally non-woven microfiber layer(s). The non-woven fabric of stiffening layer has weight of 10-500 g/cm 2> and air permeability of 2500 l/m 2>.second or more, and has partially oriented and oriented fibers. The titre of oriented fiber and partially oriented fiber is 2-12 dtex and 8-25 dtex, respectively. The fiber of filtration layer is mineral and/or glass fiber. An independent claim is included for manufacture of filter. Die vorliegende Erfindung betrifft einen Filter aus einem mehrlagigen Filtermedium welches mindestens eine Stützvliesschicht, mindestens eine Filterschicht, mindestens eine Deckschicht und ggf. mindestens eine Mikrofaser-Vliesschicht aufweist, wobei die Stützvliesschicht Fasern aus synthetischen Polymeren umfasst und die Faser sowohl teilverstreckte als auch verstreckte Fasern sind.