PROCESS FOR PRODUCING FIBRES, FILM, CASINGS AND OTHER PRODUCTS FROM MODIFIED SOLUBLE CELLULOSE

摘要

Process for producing fibres, film, casings and other products from modified soluble cellulose wherein the initial cellulose is hydrothermally treated at a temperature in the 100-200° C. range, under a pressure in the range from about 0.1 to 1.5 Mpa in a water/cellulose ration on a weight basis of at least 1:1 in the presence of a complex activator composed of Lewis acids and/or bases and/or their salts in an amount of at least 0.0001% by weight calculated on cellulose. The obtained modified cellulose pulp after, a possible purification, is in a dry or never dried condition, dissolved in an aqueous solution of alkali metal hydroxides. The dissolving is carried out at a temperature not lower than 0° C. for 1-120 minutes to obtain a homogenous spinning solution with the cellulose concentration at least 1% by weight. The alkaline cellulose solution is filtered, deaerated and coagulated by contacting it with water or aqueous acidic solutions. The produced fibres, film, casings and other products are washed with water to a neutral reaction and finished in a standard way.