FILM AND METHOD OF PREPARING THE SAME

摘要

PURPOSE: A film is provided to reduce the number of cleaning times for obtaining cellulose ether which has small content of sodium chloride by having small salt precipitation and low haze and water vapor penetration rate. CONSTITUTION: A film comprises cellulose ether and sodium chloride; a content of the sodium chloride is 0.25~0.6 weight% based on the total weight of the film; the light transmittance reduction value is less than 15%. Moreover, the manufacturing method of the film comprises a step of obtaining a cellulose ether solution in which the cellulose ether is melted in the solvent and untreated; a step processing the untreated cellulose ether solution with ultrasonic wave and obtains the treated cellulose ether solution; a step coating the treated cellulose ether solution in the material; a step of drying the coated cellulose ether solution.