Polysaccharide film and method for the production thereof

Abstract

The present invention relates to a method for the production of films made of polysaccharides which, as a fiber-forming substance, contain α(1→3)-glucan, as well as to the films made thereof and to their use.

1 . A method for the production of a polysaccharide film, wherein the finished spinning solution for the extrusion comprises an amine oxide, at least 23% by weight of water, related to the total quantity of the spinning solution, and, as a polysaccharide, α(1→3)-glucan. 
     
     
         2 . The method according to  claim 1 , wherein the amine oxide is N-methylmorpholine-N-oxide. 
     
     
         3 . The method according to  claim 1 , wherein at least 90% of the α(1→3)-glucan consist of hexose units and at least 50% of the hexose units are linked via α(1→3)-glycosidic bonds. 
     
     
         4 . The method according to  claim 1 , wherein the extrusion is carried out by means of a straight slot die or an annular slot die. 
     
     
         5 . The method according to in  claim 1 , wherein the spinning solution is stretched following the extrusion. 
     
     
         6 . A polysaccharide film comprising a film-forming substance, wherein the film-forming substance consists substantially of α(1→3)-glucan. 
     
     
         7 . (canceled) 
     
     
         8 . (canceled)