Bayer Aktiengesellschaft

Claus Gosling

Walter Simm

Bela Von Falkai

Richard Bonart

Klaus Schubert

Harald Gleinig

Dorde Jovcic

Jurgen Lahrs

Reiner Skerhut

Pulverulent preparations with a low dust content, in particular dyestuff powders, are obtained when the customary dustproofing agents are not added before the drying process and also are not sprayed directly onto the product to be dustproofed, but are allowed to act on the pulverulent product in the form of an aerosol. The average particle size of the aerosol is less than 10.mu..

Process for the manufacture of preparations with a low dust content

In a process for the production of fibre filters, the fibre material is sprayed electrostatically from the liquid state and deposited as a fibre fleece on a conductive support. The starting materials used are solutions of high polymers in readily volatile solvents. The filters obtained have substantially improved properties.

Fibre fleece of electrostatically spun fibres and methods of making same

In a process for the production of fibre filters, the fibre material is sprayed electrostatically from the liquid state and deposited as a fibre fleece on a conductive support. The starting materials used are solutions of high polymers in readily volatile solvents. The charged filters obtained have substantially improved properties.

Filter made of electrostatically spun fibres

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Leverkusen, Germany

Claus Gosling