Hoechst Aktiengesellschaft

Reinhart Mayer

Arno Holst

Rolf Kleber

Walter Fester

Wilhelm Fischer

The invention provides a process for the manufacture of viscoses from hemicellulose-containing cellulose pulps without requiring dialysis equipment. By addition of substances having a cross-linking or blocking action on the active groups of hemicellulose to the pulp before or during steeping it is possible to reduce the use of NaOH and CS.sub.2 in the manufacture of viscoses. The viscoses so obtained are distinguished by good filterability and low content of compounds causing formation of H.sub.2 S in the spinning process.

Process for the manufacture of viscoses

The invention provides a process for improving the solution state (filterability) of viscoses, wherein mashing of the alkali cellulose-xanthate with dilute sodium hydroxide solution or water and/or dissolving of the xanthate by agitation, disintegration or pump circulation etc. is carried out under an overpressure of from about 1 to 30 bar.

Process for improving the filterability of viscoses

This invention relates to a bonded non-woven fabric capable of absorbing water vapor, containing fibers of cellulose hydrate modified by at least one organic polymeric compound, either solely or blended with synthetic, natural or regenerated fibers.

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Kelheim, Germany

Reinhart Mayer