VERFAHREN ZUR HERSTELLUNG EINES FILTERMATERIALS.

摘要

The porous surface of an open-pored foam support is impregnated with adhesive before application, e.g. by dropping from low height, adsorber particles, e.g. carbon sphers of 0.1-0.9mm dia., representing 0.1-0.9 of mean pore dia. While the adhesive is still tacky, a charge of much smaller (carbon) powder of 0.05-1 micron dia. is applied. During application, both particle sizes may be electrostatically charged at opposite potential to the carrier layer.