Carl Freudenberg Kg

Armin Greiner

Klaus Veeser

Holger Schilling

Guenter Frey

Ralph Berkemann

Wolfram Schultheiss

Rudolf Wagner

Toan-Hieu Giang

Günter Frey

Klaus Marek

Jochen Bialek

Klauss Veeser

Harold Von Schischka

Juergen Adolph

Silke Frank

A wet-laid nonwoven having a1) 5-50 wt % matrix fibers and a2) 50-95 wt % at least partially thermally fused binding fibers or b1) 50-80 wt % matrix fibers and b2) 20-50 wt % binders, can be used as a light distributing element.

Element for manipulating light

A layer for use in a HEPA filter element solves the problem of disclosing a filter element which satisfies HEPA requirements. Said layer comprises a first support layer () for stabilization which contains polypropylene fibers, and a second deposition layer () which contains polypropylene fibers, wherein the polypropylene fibers of the deposition layer () are at least partially electrostatically charged, and wherein the support layer () and the deposition layer () are constructed as nonwoven material which is at least partially free of glass fiber. The layer according to the invention can be easily pleated while having excellent filter efficiency.

Layer for use in a HEPA filter element

The invention relates to a thermally bound non-woven material containing a low-shrinkage dual-component core-sheath fiber consisting of a crystalline polyester core and a crystalline polyester sheath which has a melting point at least 10&#xb0; C. lower than the core, the heat-shrinkage characteristic of said fiber being less than 10% at 170&#xb0; C.

Thermally bound non-woven material

A multi-layer air filter is described, including a filter layer which is covered by a prefilter layer on the dust-laden gas side, which has a laid dry electrostatically effective nonwoven fabric, preferably a staple fiber nonwoven fabric, whose area weight is 10 through 100 g/m . In particular, the filter may be used as a vacuum cleaner bag.

Air filter having electrostatically active nonwoven fabric inliners and their use

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Weinheim, Germany

Armin Greiner