Boehringer Mannheim Gmbh

Securetec Gmbh

Ludwig Angermaier

Christian Klein

Rolf Lerch

Reiner Schlipfenbacher

Reinhold Hilpert

Josef Ritter

Florian Binder

Harald Ertl

Helmut Oberpriller

An adsorber material for collecting, concentrating and/or recovering gaseous and/or particle-shaped trace substances from an air or gas flow, in which the adsorber material is composed of fibrous elements made of natural and/or synthetic, organic, textile fibers which are worked into a nonwoven web having a planar geometry, the nonwoven web having a thickness of between 100 .mu.m and 2 mm and a weight per unit area of between 20 and 200 g/m.sup.2. Preferably the fibers have a fiber size between 1 and 10 dtex and are composed of cellulose and/or polyester, and if desired, the fibers may be provided with a binding agent and/or a moisture resistance agent. In preferred embodiments the nonwoven adsorber web is a fiber mixture of 80 parts polyester fibers, 20 parts viscose rayon staple fibers, and 20 parts polyvinyl alcohol fibers or a fiber mixture of 50 parts viscose rayon staple fibers and 50 parts linters, which are provided with an epichlorohydrin resin binder. The adsorber webs can be used to detect gaseous or particulate trace contaminants in air or another gas stream.

Adsorber material, apparatus and process for concentrating and

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Bichl, Germany

Ludwig Angermaier