Method for creating a cellulose carbamate blown film

摘要

Cellulose carbamate-spinning solution comprises a solution of cellulose carbamate in at least one ionic liquid, where the cellulose carbamate concentration, in the spinning solution, is at least 15 wt.% and has a zero-shear viscosity, measured at 100[deg] C, of 50-7500 Pas. Independent claims are included for: (1) a method for preparing a cellulose carbamate-blown film comprising extruding the spinning solution over a film forming die and subsequently over an outer air gap in a coagulation bath; and (2) the cellulose carbamate-blown film obtained by the above method.