The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 1997
Filed:
Nov. 13, 1996
Helmut Oberpriller, Feldkirchen, DE;
Reinhold Hilpert, Moorenweis, DE;
Florian Binder, Traunstein, DE;
Josef Ritter, Munich, DE;
Harald Ertl, Gelting, DE;
Rolf Lerch, Ilvesheim, DE;
Reiner Schlipfenbacher, Bad Durkheim, DE;
Ludwig Angermaier, Bichl, DE;
Christian Klein, Weilheim, DE;
Securetec GmbH, Vagen, DE;
Boehringer Mannheim GmbH, Mannheim, DE;
Abstract
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.