New filter materials

• Main Authors: SONNENKALB WOLFGANG, ZITZMANN HELLMUT, PLATZ KARL-HEINZ, LIEBERTH JOACHIM, OHLERICH GERHARD, WENDLAND WERNER
• Format: Patent
• Language: English
• Published: 06.12.1967
• Subjects: CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES; CHEMISTRY; COMPOSITIONS BASED THEREON; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; HUMAN NECESSITIES; HYGIENE; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES; MEDICAL OR VETERINARY SCIENCE; METALLURGY; METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

A sheet material for filtering bacteria from liquids consists of asbestos and cellulose and at least one organic polymer or polycondensate which has a charge distribution of a dipole-like nature that differs from that of the other constituents. The filter material is produced without the use of a hardening process other than drying and without the use of a hardening agent. In the Example, the material is made by suspending 60 parts asbestos and 38 parts of cellulose with 2 parts urea resin in water, straining, passing over a suction device to form a filter band, and drying.ALSO:A sheet material for filtering bacteria from liquids comprises pores of average radius 45 x 10-6mm. and is made by suspending 60 parts asbestos and 38 parts of cellulose with 2 parts urea resin in water, straining and passing over a suction device to form a filter band, the material being dried but not hardened by polymerisation. Material is used as a 'filter plate', for food and bacteriological applications.