Johns Manville

Hoechst Trevira Gmbh & Co Kg

Johnsmanville Europe Gmbh

Christian Hassmann

Juergen Umminger

Andreas Schaab

Michael Schöps

Jürgen Umminger

Joerg Lehnert

Hans-Juergen Meitinger

Hans-Jürgen Meitinger

Kurt Plötz

Kurt Ploetz

Michael Schoeps

J&uuml;rg Hausser

Stefanie Hiller

The present invention relates to a filter composed of a multi-ply filter medium which (i) has at least one textile stiffening layer (layer 4), preferably a non-woven layer, of synthetic, polymer fibers, glass fibers or mixtures of the same, (ii) at least one filtration layer (layer 3), which is attached to at least one side of the non-woven stiffening fabric, the filtration layer being made up of glass fibers, (iii) at least one further filtration layer (layer 2), which is applied on the filtration layer according to ii), the further filtration layer being made up of glass fibers, and at least one textile cover layer (layer 1), which is applied on the filtration layer according to (iii), the cover layer being made up of synthetic polymer fibers. A further subject matter are filter modules including a housing and at least one filter medium according to the invention, and also a method for producing the filter medium according to the invention and also the filter modules and the use thereof in filtration of air/gas and liquids, preferably for filtration of air flows in supply air and/or heat exchanger systems.

Multi-ply filter medium

The present invention relates to a method for the manufacture of a multilayered filter medium whose air permeability is at least 500 l/msec and a multilayered filter medium obtainable by said method which, when charged with 5 mg/cmSAE-dust of the class 'fine', exhibits a pressure increase of no more than 100 Pa.

Filter medium

The present invention relates to a filter composed of a multi-ply filter medium, which comprises at least one non-woven stiffening layer, at least one filtration layer, at least one covering layer and where necessary at least one non-woven microfibre layer, the non-woven stiffening layer comprising fibers of synthetic polymers and the fibers being both partially oriented and oriented fibers.

The present invention relates to a filter composed of a multi-ply filter medium, which comprises at least one non-woven stiffening layer, at least one filtration layer, at least one covering layer and where necessary at least one non-woven microfiber layer, the non-woven stiffening layer comprising fibers of synthetic polymers and the fibers being both partially oriented and oriented fibers.

Formwork for producing articles of concrete is described, comprising a supporting means, a latticed sheet-like structure attached fast to the supporting means and a nonwoven fabric attached to the latticed sheet-like structure by means of a suitable adhesive.

Formwork for producing articles of concrete

The present invention relates to a concrete mold liner and to molds for concrete production which produce patterned or very smooth concrete surfaces.

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Mittelneufnach, Germany

Christian Hassmann