Process for the purification of products of regenerated cellulose
AssigneeWolff Walsrode AG
InventorsHans-Gert Kirchner, Bernd Wahle
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Abstract
Process for the purification of products of regenerated cellulose in which the regenerated cellulose product is passed through at least one washing segment where it is initially squeezed out with the aid of a squeezing element and then washed out with the washing water, passed in counter current, while simultaneously being deflected over deflection elements.
Claims1
A process for the purification of films of salt-containing regenerated cellulose, comprising passing the film through at least one washing cycle wherein the film is sprayed with water, squeezing the film, passing the film about deflection elements immersed in countercurrently-flowing wash water so as to wash the film, again spraying with water and again squeezing the film, the squeezing linear pressure ranging from about 100 to 500N per cm and the residence time immersed in the countercurrently-flowing wash water being less than about 10 seconds.
Dependencies are inferred from the claim text.