Carl Freudenberg Kg

Harold Von Schischka

Armin Greiner

Toan-Hieu Giang

Juergen Adolph

Klauss Veeser

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.

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Oestringen, Germany

Harold Von Schischka