Multilayered, textile, gas-permeable filter material against toxic chemical substances

US5731065A · kind A · utility

Assignee

• Alfred Kärcher GmbH & Co. KG · DE

Inventors

• Helmut Stelzmuller · Bad Liebenzell, DE
• Hans-Joachim Topfer · Backnang, DE
• Gerhard Stabler · Welzheim, DE
• Thomas Stoll · Reutlingen, DE

Key dates

• Filing date: Jan 6, 1995
• Grant date: Mar 24, 1998
• Expiry date: Jan 6, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/30
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In order to improve the handling and filtering characteristics of a multilayered, textile, gas-permeable filter material against toxic chemical substances and, in particular, filter and protective materials for the production of sheet-like filters and protective suits for the civil and military fields, it is suggested that this filter material have a first layer as textile support layer which is bonded to a second layer present in the form of an areal adhesive layer. In addition, the filter material has a third layer applied to the second layer and areally bonded thereto, this third layer comprising a textile sheet-like layer containing activated carbon fibers.